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Sample records for aires province argentina

  1. Yellow and purple nutsedges survey in the southeastern Buenos Aires Province, Argentina

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    Eyherabide Juan José

    2001-01-01

    Full Text Available A survey of 79 fields was conducted between December 1993 and January 1994, to determine the distribution and relative importance of species of the genus Cyperus, to justify developing management strategies in the southeastern of Buenos Aires Province, Argentina. Yellow and purple nutsedge were found in 43% and 9% respectively of the surveyed fields. Thirty eight per cent of the surveyed area showed a heavy infestation of yellow nutsedge, and in 90% of cases yellow nutsedge was invading fields cultivated with summer crops and associated with one or more of other seven perennial weeds, mainly bermudagrass.

  2. Surface and groundwater quality in the northeastern region of Buenos Aires Province, Argentina

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    Galindo, G.; Sainato, C.; Dapeña, C.; Fernández-Turiel, J. L.; Gimeno, D.; Pomposiello, M. C.; Panarello, H. O.

    2007-04-01

    This work studies the water quality of the Pergamino-Arrecifes River zone in the Rolling Pampa, northeast Buenos Aires Province, Argentina. Temperature, pH, specific conductivity, Na, K, Mg, Ca, SO42-, Cl -, HCO3-, NO3-, Si, Ag, Al, As, B, Ba, Be, Br, Cd, Co, Cr, Cu, Fe, Hg, Li, Mn, Mo, Ni, P, Pb, Se, Tl, U, V, Zn, and the environmental stable δ18O and δ2H isotope ratios were determined in 18 sampling stations. Natural and anthropogenic features influence surface and groundwater quality. Point pollution sources (septic wells and other domestic and farming effluents) increase the nitrate concentration. The values of pH, NO3-, Al, As, B, Fe, and Mn exceed the respective Argentine reference thresholds in different sampling stations for human drinking water; B, Mo, U, and V for irrigation; and V and Zn for cattle consumption.

  3. BIOMASS IN Eucalyptus viminalis Labill. PLANTATIONS IN BUENOS AIRES PROVINCE, ARGENTINA

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    Paula Ferrere

    2009-10-01

    Full Text Available The present work was developed in the West of Buenos Aires Province (Argentina with the objective of adjusting functions of biomass of individual trees, in their different compartments and in the understorey. Stands of Eucalyptus viminalis Labill. were identified, with ages between 4 and 14 years-old. Twenty-one individuals were felled with diameters ranging from 9,2 to 32,5 cm. Simple and multiple regression models were developed and volume, branch leaf and stem biomass were estimated. The best volume equations were based on lineal models and the most adequate behavior was obtained with d2. To estimate leaf, branch and stem, ln-ln models have been suggested, with diameter and h or only diameter. The leaf biomass presented the weakest adjustment. The distribution of trees biomass agrees with the bibliography. The proportion of crown biomass decreases with age; on the other hand, the proportion of stem biomass increases with age.

  4. Microcystis aeruginos strain [D-Leu1] Mcyst-LR producer, from Buenos Aires province, Argentina

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    Lorena Rosso

    2014-04-01

    Full Text Available Objective: To show the toxicological and phylogenetic characterization of a native Microcystis aeruginosa (M. aeruginosa strain (named CAAT 2005-3 isolated from a water body of Buenos Aires province, Argentine. Methods: A M. aeruginosa strain was isolated from the drainage canal of the sewage treatment in the town of Pila, Buenos Aires province, Argentina and acclimated to laboratory conditions. The amplification of cpcBA-IGS Phcocyanin (PC, intergenic spacer and flanking regions was carried out in order to build a phylogenetic tree. An exactive/orbitrap mass spectrometer equipped with an electrospray ionization source (Thermo Fisher Scientific, Bremen, Germany was used for the LC/ESI-HRMS microcystins analysis. The number of cell/mL and [D-Leu1] Mcyst-LR production obtained as a function of time was modelled using the Gompertz equation. Results: The phylogenetic analysis showed that the sequence clustered with others M. aeruginosa sequences obtained from NCBI. The first Argentinian strain of M. aeruginosa (CAAT 2005-3 growing under culture conditions maintains the typical colonial architecture of M. aeruginosa with profuse mucilage. M. aeruginosa CAAT 2005-3 expresses a toxin variant, that was identified by LC-HRMS/Orbitrapas as [D-Leu1] microcystin-LR ([M+H]+=1 037.8 m/z. Conclusions: [D-Leu1] microcystin-LR has been also detected in M. aeruginosa samples from Canada, Brazil and Argentina. This work provides the basis for technological development and production of analytical standards of toxins present in our region.

  5. Microcystis aeruginos strain [D-Leu1] Mcyst-LR producer, from Buenos Aires province, Argentina

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    Lorena Rosso; Daro Andrinolo; Daniela Sedan; Maria Kolman; Josep Caixach; Cintia Flores; Juan Manuel Oteiza; Graciela Salerno; Ricardo Echenique; Leda Giannuzzi

    2014-01-01

    Objective: To show the toxicological and phylogenetic characterization of a native Microcystisaeruginosa (M. aeruginosa) strain (named CAAT 2005-3) isolated from a water body of Buenos Aires province, Argentine.Methods:the town of Pila, Buenos Aires province, Argentina and acclimated to laboratory conditions. The amplification of cpcBA-IGS Phcocyanin (PC, intergenic spacer and flanking regions) was carried out in order to build a phylogenetic tree. An exactive/orbitrap mass spectrometer equipped with an electrospray ionization source (Thermo Fisher Scientific, Bremen, Germany) was used for the LC/ESI-HRMS microcystins analysis. The number of cell/mL and [D-Leu1] Mcyst-LR production obtained as a function of time was modelled using the Gompertz equation.Results:A M. aeruginosa strain was isolated from the drainage canal of the sewage treatment in sequences obtained from NCBI. The first Argentinian strain of M. aeruginosa (CAAT 2005-3) growing under culture conditions maintains the typical colonial architecture of M. aeruginosa with profuse mucilage. M. aeruginosa CAAT 2005-3 expresses a toxin variant, that was identified by LC-HRMS/Orbitrapas as [D-Leu1] microcystin-LR ([M+H]+=1037.8 m/z). The phylogenetic analysis showed that the sequence clustered with others M. aeruginosa Conclusions: [D-Leu1] microcystin-LR has been also detected in M. aeruginosa samples from Canada, Brazil and Argentina. This work provides the basis for technological development and production of analytical standards of toxins present in our region.

  6. Simulation of regional-scale groundwater flow in the Azul River basin, Buenos Aires Province, Argentina

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    Varni, Marcelo R.; Usunoff, Eduardo J.

    A three-dimensional modular model (MODFLOW) was used to simulate groundwater flow in the Azul River basin, Buenos Aires Province, Argentina, in order to assess the correctness of the conceptual model of the hydrogeological system. Simulated heads satisfactorily match observed heads in the regional water-table aquifer. Model results indicate that: (1) groundwater recharge is not uniform throughout the region but is best represented by three recharge rates, decreasing downgradient, similar to the distribution of soils and geomorphological characteristics; and (2) evapotranspiration rates are larger than previous estimates, which were made by using the Thornthwaite-Mather method. Evapotranspiration rates estimated by MODFLOW agree with results of independent studies of the region. Model results closely match historical surface-flow records, thereby suggesting that the model description of the aquifer-river relationship is correct. Résumé Un modèle modulaire tridimensionnel (MODFLOW) a été utilisé pour simuler les écoulements souterrains dans le bassin de la rivière Azul (Province de Buenos Aires, Argentine), dans le but d'évaluer la justesse du modèle conceptuel du système hydrogéologique. La piézométrie simulée s'ajuste de façon satisfaisante à celle observée pour l'ensemble de la nappe. Les résultats du modèle indiquent que: (1) la recharge de la nappe n'est pas uniforme sur toute la région, mais qu'elle est mieux approchée par trois valeurs différentes, décroissant vers l'aval-gradient, en suivant la même distribution que les sols et les caractéristiques géomorphologiques et (2) l'évapotranspiration est nettement plus importante que prévu initialement à partir de la méthode de Thornthwaite-Mather. Les valeurs d'évapotranspiration fournies par MODFLOW concordent bien avec les résultats d'autres études portant sur la région. Les résultats du modèle reproduisent convenablement les chroniques de débit des écoulements de surface

  7. Insights into Pleistocene palaeoenvironments and biostratigraphy in southern Buenos Aires province (Argentina) from continental deposits

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    Beilinson, E.; Gasparini, G. M.; Soibelzon, L. H.; Soibelzon, E.

    2015-07-01

    The coastal cliffs of the Buenos Aires province (Argentina) have been the subject of intense paleontological studies since the XIX century. Therefore, many of the type localities in which is based the late Cenozoic Pampean biostratigraphic/chronostratigraphic scheme are located in this area. In this context, the sedimentites that crop out near the mouth of the Chocorí Creek contain a set of palaeontological sites that, because of their richness and well-preserved fossil content, hold high national and international importance. The aims of the present contribution are: 1) to make a stratigraphic and sedimentological characterization of the study area; 2) to list the fauna outcropped at these palaeontological sites and establish a biostratigraphic framework; 3) to elaborate a palaeoenvironmental model for the area. The study interval was informally subdivided into a lower, middle and upper interval. Interpretation was based on the presence of a number of key features such as architectural elements; channel:overbank ratio and palaeosol occurrence. The first two intervals were interpreted as continental deposits of a fluvio-alluvial nature and are the focus of this paper. The upper interval was related to foreshore marine deposits and will be studied in a future contribution. The lower interval is characterized mainly by overbank architectural elements in which calcisols and argillic protosols were identified. Channel-fill deposits are isolated and surrounded by fine-grained overbank successions and sedimentary structures are suggestive of mixed-load transport. The contact between the lower and middle intervals is an irregular, highly erosive surface characterized by a significant vertical change in the facies. This surface defines the base of multistorey sandbodies which's internal arrangement alongside with the low participation of overbank deposits suggests deposition by a braided fluvial system. Palaeosols and vertebrate fossils were used as palaeoclimatic

  8. The Risk Assessment Program and the Court of Penal Execution in the Province of Buenos Aires, Argentina.

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    Folino, Jorge O; Marengo, Claudio M; Marchiano, Susana E; Ascazibar, Mariel

    2004-02-01

    This study describes the working of a new system that supervises the execution of the punishment phase in the Province of Buenos Aires, Argentina; namely, the Court of Penal Execution, as well as the risk assessment program. It also reports the results of the violent recidivism baseline risk assessment carried out in candidates for conditional release. The cohort studied was recruited during 18 months in the Judicial Department of La Plata, taking into consideration psychopathological and criminological variables. The Psychopathy Checklist-Revised (PCL-R), the Historical, Clinical, and Risk Management--20 (HCR-20), and the Violence Risk Appraisal Guide (VRAG), among others, were used as measures. During the study period, 65 candidates for conditional release were part of the baseline assessment, and they constitute the population of this study. The measures' mean scores were PCL-R, 20.57; HCR-20, 18.58; VRAG, 12.17.

  9. Soil Water Surplus in Salado River Basin and Its Variability during the Last Forty Years (Buenos Aires Province, Argentina

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    Alberto Daniel Capriolo

    2011-01-01

    Full Text Available Soil water surplus and deficit occur frequently in Buenos Aires province in Argentina. This paper analyses the soil water surplus in a sub-area, the Salado River basin, in the period 1968–2008. This basin is divided in seven drainage areas, delimitated according to the National Water Resources. The series of soil water surplus data were adjusted by means of the theoretical normal cubic-root probability distribution, and the mean areal soil water surplus value of 300 mm was considered as a threshold above which floods can cause severe damage. An increase in the frequency of extreme events and in their tendency exists during the recent years, coherent with the increase of precipitation recorded in the region. The statistical significance of the results was assessed using the Mann Kendall and MAKESENS tests. The results showed a relevant temporal variability, but did not show significant tendencies.

  10. A Pleistocene (MIS 5e) mollusk assemblage from Ezeiza (Buenos Aires Province, Argentina)

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    Martínez, Sergio; Julia del Río, Claudia; Rojas, Alejandra

    2016-10-01

    A fossil assemblage collected around 3.5 m amsl from Ezeiza, Buenos Aires province, have AMS 14C ages of ca. 33,000 to ca. 40,000 yr BP, whereas in the literature is a report of a conventional 14C age of >43,000 yr BP. An OSL age from the overlying deposit corresponds to ca. 22,000 yr. The samples contain marine fossils: mollusks, balanids and corals (Astrangia). La Coronilla (Uruguay, attributed to MIS 5e) is the locality most related to Ezeiza faunistically, despite is not the nearest one. In consequence, the relationship should be addressed to a more similar age and environment than others. The fauna indicates a higher water temperature than today. In Ezeiza exclusively cold water taxa are absent, and we found seven warm taxa with their southern distribution limit displaced northwards today, plus other six at their southern distribution limit. Around 60% of all the species and more than 70% of the individuals are of warm-temperate waters. In sum, although prima facie the numerical ages would locate the deposit in MIS3, faunistic, temperature, and height evidences show that the Ezeiza mollusk assemblage belong to MIS5e. A stronger than presently Brazil warm current, reaching Southern latitudes, may explain the changes in geographical ranges.

  11. Magnetic Characterization of Stream-Sediments From Buenos Aires Province, Argentina, Affected by Pollution

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    Chaparro, M. A.; Sinito, A. M.; Bidegain, J. C.; Gogorza, C. S.; Jurado, S.

    2001-12-01

    A wide urban area from Northeast of Buenos Aires Province is exposed to an important anthropogenic influence, mainly due to industrial activity. In this two water streams were chosen: one of them (Del Gato stream, G) next to La Plata City and the another one (El Pescado stream, P) on the outskirts of the city. Both streams have similar characteristics, although the first one (G) has a higher input of pollutants (fluvial effluents, fly ashes, solid wastes, etc.) than the last one (P). Sediments analyzed in this work are limes from continental origin of PostPampeano (Holocene). Although, some cores were affected by sandy-limy sediments with mollusc valves from Querandino Sea (Pleistocene - later Holocene) and limy sediments of chestnut color with calcareous concretions from the Ensenadense. Magnetic measurements and geochemical studies were carried out on the samples. Among the magnetic parameters, specific susceptibility (X), X frequency-dependence (Xfd%), X temperature-dependence, Natural Remanent Magnetization (NRM), Isothermal Remanent Magnetization (IRM), Saturation IRM (SIRM), coercivity of remanence (Bcr), S ratio and SIRM/X ratio, Anhysteric Remanent Magnetization (ARM), Magnetic and Thermal Demagnetization were studied. The magnetic characteristics for both sites indicate the predominance of magnetically soft minerals on G site and relatively hard minerals on P site. Magnetite is the main magnetic carrier, Pseudo Single Domain and Single Domain grains were found. Chemical studies show (in some cases) a high concentration for some heavy metals (Pb, Cu, Zn, Ni and Fe) on the upper 22-cm. Contents of heavy metals and ARM were correlated. Very good correlation (R> 0.81) is found for Cu, Zn, Ni, Fe and the sum (of Pb, Cu, Zn and Ni), and a weaker correlation for Pb.

  12. Ecology and conservation of large coastal sharks from Anegada Bay, Buenos Aires province, Argentina.

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    Lucifora, L.O.

    2003-01-01

    Reproduction, age, growth, feeding habits and population dynamics of four large temperate sharks (sand tiger shark Carcharias taurus, school shark Galeorhinus galeus, copper shark Carcharhinus brachyurus, and broadnose sevengill shark Notorynchus cepedianus) were studied in Anegada Bay (between 39°50' and 40°40'S), Argentina. Data were gathered from 1089 individuals examined during a three-year study period. Age and growth were studied through examination of vertebral centra only in the first...

  13. Radiological and hyperfine characterization of soils from the Northeastern region of the Province of Buenos Aires, Argentina

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    Montes, M. L.; Mercader, R. C.; Taylor, M. A.; Runco, J. [Universidad Nacional de La Plata, Instituto de Fisica La Plata - CONICET, Departamento de Fisica, Facultad de Ciencias Exactas (Argentina); Imbellone, P. [Universidad Nacional de La Plata, Instituto de Geomorfologia y Suelos (Argentina); Rivas, P. C. [Universidad Nacional de La Plata, Instituto de Fisica La Plata - CONICET, Facultad de Ciencias Agrarias y Forestales (Argentina); Desimoni, J., E-mail: desimoni@fisica.unlp.edu.ar [Universidad Nacional de La Plata, Instituto de Fisica La Plata - CONICET, Departamento de Fisica, Facultad de Ciencias Exactas (Argentina)

    2011-11-15

    The activity concentrations of both natural ({sup 238}U and {sup 232}Th chains and {sup 40}K) and anthropogenic ({sup 137}Cs) radionuclides down along the soil profile have been determined in soil samples collected from inland and coastal areas of the La Plata River, located in the Northeastern region of the Province of Buenos Aires, Argentina. These studies were complemented with {sup 57}Fe Moessbauer spectroscopy characterization, pH, texture and organic carbon content measurements. From Moessbauer results, the sample compositions differ from one area to the other. Spectra from both soil samples are dominated by the Fe{sup 3+ } paramagnetic signal. For soil samples from the coastal area, the {alpha}-Fe{sub 2}O{sub 3} contribution is lower, Fe{sub 3}O{sub 4} was not detected, and the relative areas of each spectral contribution are nearly constant with depth. For samples from the inland area, the Fe{sup 3+ } paramagnetic fraction increases up to 82%, mainly at the expense of the magnetically ordered phase. The main observed activity originates from the decay of {sup 40}K (540-750 Bq/kg), followed by {sup 238}U (60-92 Bq/kg) and {sup 232}Th (37-46 Bq/kg) chains. The activity of {sup 235}U was in all the cases lower than the detection limit (L{sub D} = 0.02 Bq/kg). The only determined anthropogenic nuclide was {sup 137}Cs, arising from the fallout of the Southern Hemisphere nuclear weapon tests. Three of the observed differences in the depth distributions can be described by the dispersion-convection model. A correlation between the natural nuclide activities and the Moessbauer relative fractions was found, whereas no correlation was found between the {sup 137}Cs profile and the relative fraction of Fe{sub 3}O{sub 4} or with other iron species.

  14. Palynofacial analysis in alkaline soils and paleoenvironmental implications: The Paso Otero 5 archaeological site (Necochea district, Buenos Aires province, Argentina)

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    Grill, S.; Borromei, A.; Martínez, G.; Gutierrez, M. A.; Cornou, M. E.; Olivera, D.

    2007-06-01

    The combination of palynofacial and sedimentological analyses constitutes a valuable method for paleoenvironmental and paleoclimatic reconstructions, especially when fossil pollen information is scarce or absent. This methodology elucidates a late Pleistocene/Holocene sequence at the Paso Otero 5 archaeological site in the middle basin of the Quequén Grande River, Necochea district, Buenos Aires province, Argentina. Although the main factor responsible for the destruction of pollen grains is pH, biochemical and chemical oxidation and mechanical damage contribute to the deterioration as well. The site sequence indicates that extremely arid climatic conditions without vegetation cover prevailed during the late Pleistocene (˜12,000 14C yr BP), after which the climate changed to semiarid conditions associated with a disturbed environment due to strong eolian activity (Palynofacies 1 and 2; pre-10,400 14C yr BP). During the Pleistocene/Holocene transition (Palynofacies 3 and 4; ˜10,400-9400 14C yr BP), loamy facies associated with paleosoils reflected stable conditions and temporary ponds (spring deposits). Similar conditions occurred near the end of early Holocene (Palynofacies 5-9; ˜9400-6600 14C yr BP), whereas sandy and silty facies are associated with the flood margins of streams or rivers in the middle and late Holocene (Palynofacies 10-14; 6600-2500 14C yr BP). The top of the sequence (Palynofacies 15 and 16) consists of alluvium sediments and reflects locally humid conditions and modern vegetation with anthropic influence. One of the earliest Pampean sites with evidence of humans (10,450-10,200 14C yr BP), Paso Otero 5, provides a variety of megafauna bone specimens associated with ``fish-tail" projectile points, a lithic artifact diagnostic of early human occupations in South America. The site contains a complete stratigraphic record from the late Pleistocene to the present. The evidence presented herein supports the hypothesis that human colonization, at

  15. First report of diarrheic shellfish toxins in mollusks from Buenos Aires province (Argentina associated with dinophysis spp.: evidence of okadaic acid, dinophysistoxin-1 and their acylderivatives

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    Eugenia A Sar

    2012-06-01

    Full Text Available In January 2010, the toxin-producing dinoflagellates Dinophysis acuminata and D. caudata (10³ cells·l-1 were detected in Mar Azul during routine plankton monitoring in Buenos Aires Province coastal waters, Argentina. Wild clams Mesodesma mactroides and Donax hanleyanus from Mar Azul intertidal beach, which are part of the diet for local inhabitants and tourists, tested positive with the offcial lipophilic mouse bioassay. This paper focuses on the detection of Diarrhetic Shellfsh Poison (DSP toxins in these samples using a HPLC-FLD pre column derivatization procedure. The data showed that shellfish were contaminated with complex DSP toxin profiles composed of Okadaic Acid (OA, Dinophysistoxin-1 (DTX-1, Acyl-Dinophysistoxin-1 (Acyl-DTX-1 and Acyl-Okadaic Acid (Acyl-OA. The DSP toxins found in this study produce diarrhea symptoms consistent with those experienced by patients who had ingested cooked shellfish in January. This is the first report of Acyl-derivatives in South American Atlantic shellfish samples and of OA in Argentinean shellfish samples.Primer reporte de toxinas diarreicas de moluscos en bivalvos de la Provincia de Buenos Aires (Argentina asociado con Dinophysis spp.: evidencia de Ácido Okadaico, Dinophysistoxina-1 y sus acyl-derivados. En enero de 2010, los dinoflagelados productores de toxinas Dinophysis acuminata y D. caudata (10³ cells·l-1 fueron detectados en Mar Azul durante un monitoreo rutinario de fitoplancton realizado en aguas costeras de la Provincia de Buenos Aires, Argentina. Mesodesma mactroides (almeja amarilla y Donax hanleyanus (berberecho del intermareal de Mar Azul, que son parte de la dieta de los habitantes del lugar y de turistas, dieron resultado positivo para toxinas lipofílicas mediante bioensayo ratón. Este trabajo está focalizado en la detección de Toxinas Diarreicas de Moluscos (DSP en muestras colectadas durante el evento de toxicidad usando un HPLC-FLD con procedimiento de derivatizaci

  16. [Detection of anti-Brucella spp. antibodies in swine by agglutination techniques and indirect ELISA in the Buenos Aires and La Pampa provinces, Argentina].

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    Castro, H A; González, S R; Prat, M I; Baldi, P C

    2006-01-01

    Porcine brucellosis is one of the most important zoonoses in this country. Currently, there is no control program for porcine brucellosis in Argentina and the epidemiological situation is still unknown. The purpose of our study was to detect anti-Brucella spp. antibodies in swine in the southwest of the Buenos Aires province and the east of the La Pampa province. Blood samples were obtained when animals were slaughtered. The presence of anti-brucella antibodies was studied by the buffered plate agglutination test (BPA), the tube agglutination test (SAT), the 2-mercaptoethanol (2-ME) agglutination test and indirect ELISA tests, using the cytosolic fraction from Brucella abortus S19 (CYT), and lipopolysaccharide (LPS)-free cytosolic proteins (CP). Out of a total of 325 samples analyzed, 17.8% reacted positively to BPA, 13.8% to SAT, 8.0% to 2-ME, 21.0% to ELISA-CYT and 10.0% to ELISA-CP. These results agree with the few data available in our country and suggest that brucellosis screening should be extended to other regions. PMID:17037254

  17. [From educational and health tourism for children to social tourism: vacation camps in the Province of Buenos Aires, Argentina].

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    Bruno, Perla

    2015-12-01

    The early twentieth century saw the rise of vacation camps for frail children as educational and health-giving experiences provided by medical and philanthropic organizations. This article analyzes some of these early experiences, seen here as the predecessors of social tourism, in the Province of Buenos Aires. A combination of written sources are examined, mainly institutional reports, periodicals such as the Monitor de la Educación Común - published by the Consejo Nacional de Educación (National Board of Education) - or laws, with photographs and plans for different examples. I argue that these buildings were both physical and cultural "brands" in the places where they were located, and that their architectural structure encapsulated ideas about leisure space and cures in unique natural environments.

  18. [From educational and health tourism for children to social tourism: vacation camps in the Province of Buenos Aires, Argentina].

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    Bruno, Perla

    2015-12-01

    The early twentieth century saw the rise of vacation camps for frail children as educational and health-giving experiences provided by medical and philanthropic organizations. This article analyzes some of these early experiences, seen here as the predecessors of social tourism, in the Province of Buenos Aires. A combination of written sources are examined, mainly institutional reports, periodicals such as the Monitor de la Educación Común - published by the Consejo Nacional de Educación (National Board of Education) - or laws, with photographs and plans for different examples. I argue that these buildings were both physical and cultural "brands" in the places where they were located, and that their architectural structure encapsulated ideas about leisure space and cures in unique natural environments. PMID:26625926

  19. Dieta y ecomorfología de la ictiofauna del arroyo Manantiales, provincia de Buenos Aires, Argentina Diet and ecomorphology of the ichthyofauna of Manantiales stream, Buenos Aires province, Argentina

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    Eduardo M Fernández

    2012-06-01

    Full Text Available Se estudio la correlación entre dieta y morfología de 19 especies de peces del arroyo Manantiales, cabecera del río samborombón, provincia de Buenos Aires, Argentina. Las especies fueron clasificadas en cuatro grupos tróficos: carnívoros, omnívoros, insectívoros y detritívoros- alguívoros. Se analizaron 12 atributos ecomor-fológicos relacionados con el uso del hábitat y la alimentación con el fin de distinguir patrones ecomorfológicos de las especies y de las especies con el alimento consumido. Se utilizaron técnicas de análisis univariado y multivariado para determinar agrupamientos de especies utilizando los atributos ecomorfológicos y la dieta como descriptores. Los carnívoros se relacionaron con un buen desarrollo de cabeza, boca, aletas caudal y pectoral; y en general con cuerpos comprimidos. Los omnívoros constituyeron un grupo más heterogéneo. Las formas nectónicas de este grupo se relacionaron con un cuerpo comprimido, ojos laterales y tamaño relativamente pequeño de las aletas pectorales y aleta caudal; las formas nectobentónicas se relacionaron con boca pequeña, cuerpo fusiforme y pedúnculo caudal largo; y las formas bentónicas, con cuerpo deprimido, ojos de posición dorsal, boca ínfera y tubo digestivo largo. La única especie nectónica consumidora de insectos sobre la superficie se caracterizó por un cuerpo fuertemente comprimido, ojos laterales, aleta caudal grande y boca grande orientada hacia arriba. Los detritívoros-alguívoros presentaron un tubo digestivo largo, boca ínfera o terminal y aletas caudales largas. La relación significativa dieta-ecomorfología permite sostener que peces de dieta similar convergen hacia atributos ecomorfológicos comunes.The present study addresses the correlation between diet and morphology of 19 fish species that inhabit the Manantiales stream at the headwaters of the samborombón river, Buenos Aires province, Argentina. The species were classified into four

  20. The occurrence of Shiga toxin-producing Escherichia coli in bathing water of the Sierra de la Ventana region, Buenos Aires Province, Argentina.

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    Marucci, Patricia L; Olivera, Nelda L; Brugnoni, Lorena I; Sica, Maria G; Cubitto, Maria Amelia

    2011-04-01

    The region of Sierra de la Ventana is located in the southwest of Buenos Aires Province, Argentina. Traditionally, this area has been devoted to livestock and agriculture, but tourism has had a significant development in recent years. In the region, there are many rivers and streams that are used for swimming and bathing. A survey of the occurrence of Shiga toxin-producing Escherichia coli (STEC) in these waters was conducted, and the microbiological quality of rivers and streams was investigated. No E. coli O157 was recovered by immunomagnetic separation. Nevertheless, the Shiga toxin gene, exclusively stx2 genotype, was detected in four non-O157 E. coli strains. Two STEC strains carried eae factor, but none of them harbored the EHEC-hlyA gene. Three of the STEC isolates belonged to samples obtained in the warm months, and one to the winter sampling. In the sample sites where STEC strains were isolated the counts of E. coli/100 ml exceeded or were close to the limit recommended by the United States Environmental Protection Agency for bathing water. The relationship observed between the rainy season and E. coli counts suggests that among the main causes for the hygienic indicator increase is the runoff of manure deposited on soils that may also induce the entrance of pathogens into the aquatic environment. This research, the first reporting STEC isolation from recreational waters in this area, revealed that streams and rivers from a beef-producing area of Argentina are a reservoir of STEC strains.

  1. Antiquity of the Rı´o de la Plata craton in Tandilia, southern Buenos Aires province, Argentina

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    Pankhurst, R. J.; Ramos, A.; Linares, E.

    2003-05-01

    Rb-Sr and Sm-Nd whole-rock data for granitoids and orthogneisses from the western part of the Sierras Septentrionales of the southern Buenos Aires province yield an errorchron of 2009±71 Ma (initial 87Sr/ 86Sr=0.7041, MSWD=69) and an isochron of 2140±88 Ma (initial 143Nd/ 144Nd=0.50977), respectively. As in previous investigations, the Rb-Sr data are clearly disturbed, but the Sm-Nd isochron may record the age of emplacement of igneous precursors. These results reaffirm that this region is the southern extension of the crystalline basement of the Rı´o de la Plata craton. The Sm-Nd age, though not very precise, is slightly older than previously demonstrated but consistent with most recent U-Pb studies of the craton exposed in Uruguay and Brazil. Crust-derived Sm-Nd model ages averaging 2620±80 Ma indicate that, though the principal rock-forming events were Paleoproterozoic, a Late Archaean prehistory is possible. However, the data place strict constraints on the nature and intensity of post-2000 Ma activity in this area, which seems to be confined to tholeiitic dyke emplacement and hydrothermal reactivation.

  2. Provenance of the Lower Paleozoic Balcarce Formation (Tandilia System, Buenos Aires Province, Argentina): Implications for paleogeographic reconstructions of SW Gondwana

    Science.gov (United States)

    Zimmermann, Udo; Spalletti, Luis A.

    2009-07-01

    Lower Paleozoic moderately sorted quartz-arenites from the Balcarce Formation deposited in eastern Argentina (Tandilia System) comprise mainly detrital material derived from old upper crustal material. The sources were magmatic, sedimentary, and subordinated felsic metamorphic terranes. High concentrations of tourmaline and Ti-rich heavy minerals, including zircon and nearly euhedral chromite, are common. Trace element concentrations (Nb, Cr) on rutile indicate pelitic and metabasaltic sources, respectively. Major element analyses on chromites indicate a basic volcanic protolith of mid-oceanic ridge origin, which was exposed close to the depositional basin. The delivery of chromite may be associated with convergent tectonics causing the consumption and obduction of oceanic crust during pre-Upper Ordovician times. The oblique/orthogonal collision of the Precordillera Terrane with the western border of the Rio de la Plata Craton, west of the Balcarce Basin or source further to the east from a Lower Palaeozoic extensional basin are possibilities. Geochemical and petrographic data exclude the underlying Precambrian and Cambrian sedimentary rocks as dominant sources, and favour the basement of the Río de La Plata Craton, including Cambrian rift-related granites of South Africa and the Sierras Australes (eastern Argentina), as main suppliers of detritus. Trace element geochemistry of recycled pyroclastic material, associated with the quartz-arenites, also suggests volcanic arc sources. The provenance of the pyroclastic material may either be the Puna-Famatina arc, located in north and central Argentina, or a hypothetical active margin further to the south. These ash layers are equivalent in age to volcanic zircons found in the Devonian Bokkeveld Group in western South Africa. The deposition of a glacial diamictite of Hirnantian age (Sierra del Volcán Diamictite) is interpreted as a member of the Balcarce Formation. Based on the stratigraphic re-location of the glacial

  3. Dieta y ecomorfología de la ictiofauna del arroyo Manantiales, provincia de Buenos Aires, Argentina Diet and ecomorphology of the ichthyofauna of Manantiales stream, Buenos Aires province, Argentina

    OpenAIRE

    Eduardo M Fernández; Ricardo A Ferriz; Cristina A Bentos; Guillermo R. López

    2012-01-01

    Se estudio la correlación entre dieta y morfología de 19 especies de peces del arroyo Manantiales, cabecera del río samborombón, provincia de Buenos Aires, Argentina. Las especies fueron clasificadas en cuatro grupos tróficos: carnívoros, omnívoros, insectívoros y detritívoros- alguívoros. Se analizaron 12 atributos ecomor-fológicos relacionados con el uso del hábitat y la alimentación con el fin de distinguir patrones ecomorfológicos de las especies y de las especies con el alimento consumid...

  4. The Federal Law of Education in Argentina: Its Application in the Province of Buenos Aires La Ley Federal de Educación en la Argentina:Su Aplicación en la Provincia de Buenos Aires

    Directory of Open Access Journals (Sweden)

    María Fernanda Arias

    2005-01-01

    Full Text Available The present work seeks to analyze the results of the educational reform of the secondary school system in Argentina initiated by the Ley Federal de Educación in 1993. This article has chosen Greater Buenos Aires, the biggest conurbation in the country, as a "case study." The methodology used is based on quantitative and qualitative surveys administered to the top authorities of state and private schools in the area. We conclude that the reactions toward the reform are, in general, negative. Furthermore, there are no differences in attitudes between private and state schools. Both of them agree that the worst effect is the leveling down of the quality of education. In other words, the main cause of disagreement is mostly pedagogic. En el marco de la "reforma educativa" de la enseñanza media impuesta en la Argentina a partir de la Ley Federal de Educación (1993, se intenta describir los efectos que tuvo esta reforma en el ámbito del conurbano porteño de la provincia de Buenos Aires. Por esta razón, se utilizaron encuestas cuantitativas y cualitativas realizadas a las autoridades de establecimientos educativos públicos y privados del nivel medio, actualmente, Polimodal. En términos generales, la reacción frente a la transformación del sistema educativo en el ámbito analizado se percibe negativa. Además, en las respuestas dadas por las autoridades encuestadas, no se advierten diferencias notables. En todas se subraya la transformación en detrimento de la calidad educativa, lo que lleva a concluir que las razones del rechazo general obedecen principalmente a fundamentaciones de tipo pedagógicas.

  5. Payenia volcanic province, southern Mendoza, Argentina

    DEFF Research Database (Denmark)

    Søager, Nina; Holm, Paul Martin; Llambias, Eduardo Jorge

    2013-01-01

    to the low thickness of the lithospheric mantle and preheating of the lower crust by earlier Mio-Pliocene volcanism. Rare earth element modelling of mantle melting calls for enriched source compositions and a beginning of melting within the garnet stability field for all Payenia basalts. The Río Colorado......The Pleistocene to Holocene Payenia volcanic province is a backarc region of 60,000 km2 in Mendoza, Argentina, which is dominated by transitional to alkaline basalts and trachybasalts. We present major and trace element compositions of 139 rocks from this area of which the majority are basaltic...... rocks with 4 to 12 wt.% MgO and 44 to 50 wt.% SiO2. The southern Payenia province is dominated by intraplate basalts and the trace element patterns of the Río Colorado and Payún Matrú lavas suggest little or no influence from subducted slab components. The mantle source of these rocks is similar to some...

  6. Extensión del límite austral de distribución de tres especies de peces óseos tropicales en la costa de la Provincia de Buenos Aires, Argentina Southern extension of three species of tropical bony fishes along the coast of Buenos Aires Province, Argentina

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    Andrés C Milessi

    2012-11-01

    Full Text Available Se presentan tres nuevos registros de especies de peces óseos cuya distribución corresponde a aguas tropicales, capturados por buques pesqueros en la costa de la Provincia de Buenos Aires, Argentina (CPBA, 36°-38°S. Los ejemplares corresponden a las especies: Rachycentrum canadum, Elops saurus y Caulolatilus chrysops. Estos registros amplían significativamente el límite austral de su distribución. La presencia ocasional de estas especies está asociada al transporte de agua subtropical cálida proveniente de la plataforma continental brasilera. Esta hipótesis es probada mediante el análisis de imágenes satelitales de temperatura superficial del mar.We document the southern records of three species of tropical bony fishes along the coast of Buenos Aires Province, Argentina (CBAP, 36-38°S. Rachycentrum canadum, Elops saurus and Caulolatilus chrysops were caught by bottom-trawl commercial vessels. Records presented here significantly extend southward their latitudinal distribution from those previously reported. Using sea surface temperature satellite images we show a southward warm circulation event from Brazil as a putative factor to explain the occurrence of these bony fishes in the CBAP.

  7. Status and conservation of the ruddy-headed goose Chloephaga rubidiceps Sclater (Aves, Anatidae in its wintering grounds (Province of Buenos Aires, Argentina Estado y conservación del cauquén colorado Chloephaga rubidiceps Sclater (Aves, Anatidae en su zona de invernada (Provincia de Buenos Aires, Argentina

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    DANIEL E BLANCO

    2003-03-01

    Full Text Available ABSTRACT The mainland population of the ruddy-headed goose (Chloephaga rubidiceps breeds in southern Patagonia and winters in the south of Buenos Aires province (Argentina, with a recent estimated size at around 900 individuals. This population is considered "in danger of extinction", while the Malvinas (Falkland Islands population is in well conservation status, with an estimated size of 40,000 birds. The aim of this work is to contribute with updated information about the ruddy-headed goose's population wintering in southern Buenos Aires province. The specific objectives were to better delimit its wintering area, to look for sites with large numbers, to study its habitat used, and to identify main threats to the species. Two intensive surveys were conducted during the austral winter of 1999. The results: (1 confirm the low abundance of the ruddy-headed goose supporting its critical conservation status, (2 corroborate its very restricted distribution, with more than 80 % of sightings concentrated in an area of 13,000 ha in southern Buenos Aires province, and (3 suggest that changes in the species' habitat use during the wintering season appear to be a response to changes in habitat availability, resulting from the growth of crops and pastures. The overlap between the species wintering distribution and the main wheat cropping areas of Argentina results in serious threats to this goose. Management actions are discussed to contribute to the conservation of this endangered species.La población continental del Cauquén colorado (Chloephaga rubidiceps cría en el sur de la Patagonia e inverna en el sur de la provincia de Buenos Aires (Argentina, con un tamaño poblacional estimado recientemente en alrededor de 900 individuos. Esta población está considerada "en peligro de extinción", mientras la población de las Islas Malvinas se mantiene en buen estado de conservación, con un tamaño estimado en 40.000 individuos. La meta de este trabajo es

  8. Los Ceratopogonidae (Diptera: Culicomorpha del Sistema Serrano de Ventania (Buenos Aires, Argentina The Ceratopogonidae (Diptera: Culicomorphafrom the Sistema Serrano de Ventania (Buenos Aires, Argentina

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    Pablo I. Marino

    2011-12-01

    Full Text Available Se brinda un listado de especies de ceratopogónidos presentes en el Sistema Serrano de Ventania, Buenos Aires, Argentina. Se realizaron seis viajes de estudio y se relevaron nueve sitios de muestreo. Se identificaron 25 especies pertenecientes a ocho géneros, de las cuales sólo Culicoides venezuelensis y Brachypogon (Brachypogon bonaerensis han sido citadas previamente para el área. Ocho especies se registran por primera vez para la provincia de Buenos Aires y una para Argentina.A list of the ceratopogonid species from the Sistema Serrano de Ventania, Buenos Aires, Argentina is presented. Six field trips were carried out sampling nine different localities. Twenty five species of ceratopogonids belonging to eight genera were recorded; only Culicoides venezuelensis and Brachypogon (Brachypogon bonaerensis were known from the area. Eight species are reported for the first time from Buenos Aires province and one from Argentina.

  9. Caracteres anatómicos de la vegetación costera del Río Salado (Noroeste de la provincia de Buenos Aires, Argentina Anatomic features of Salado river coastal vegetation (Northwest of Buenos Aires Province, Argentina

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    Nancy Mariel Apóstolo

    2005-12-01

    Full Text Available Veintiún especies (doce Dicotyledoneae y nueve Monocotyledoneae pertenecientes a la vegetación costera del río Salado (noroeste de la provincia de Buenos Aires, Argentina fueron estudiadas con el fin de determinar las características anatómicas relacionadas a estrategias adaptativas al medio. Dichas especies pertenecen a los humedales de la cuenca del Salado y, por lo tanto, están afectadas por inundación, sequía temporaria y alta salinidad en agua y suelo. Caracteres anatómicos típicos de las especies que crecen en humedales combinados con características xeromórficas actuarían como estrategia adaptativa para aclimatarse en dicho medio. Los representantes de Poaceae y Cyperacae y algunos de Asteraceae tienen aerénquima en raíz y tallo. El 50% de las especies estudiadas muestran estructura Kranz. Escasas especies de Dicotyledoneae (Aizoaceae y Asteraceae muestran pelos de indumento. El tejido acuífero y los mucílagos son evidentes en especies de Aizoaceae, Chenopodiaceae, Malvaceae y Asteraceae. Ceras epicuticulares están presentes en mayor o menor grado en todas las especies analizadas. El 40% de las especies tienen glándulas de sal, principalmente las Poaceae. Cristales de oxalato de calcio y magnesio en diversas formas se observan en la mayoría de la Dicotyledoneae, no presentándose en Monocotyledoneae. Estas características anatómicas indican la capacidad de las especies para sobrevivir a condiciones extremas del medio en la vegetación costera del río Salado.In order to determine the anatomical features acting as adaptive strategies to the environment, 21 species were studied (12 Dicotyledoneae and nine Monocotyledoneae belonging to the coastal vegetation of the Salado river. These species are included in wetlands of Salado River Basin and are affected by flooding, drought and high salinity in water and soil. Typical anatomical features of wetland plants combined with xeromorphic characters could act as adaptive

  10. Diversidad de Anamorfos de Ascomycota en bosques nativos de Celtis tala (Ulmaceae en la Provincia de Buenos Aires, Argentina Diversity of anamorphic fungi in Celtis tala (Ulmaceae native forest from Buenos Aires province, Argentina

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    Natalia Allegrucci

    2007-07-01

    Full Text Available En el presente trabajo se analizó la diversidad de microhongos que constituyen la comunidad fúngica saprótrofa (anamorfos de Ascomycota presente en hojarasca y suelo en bosques nativos de Celtis tala (tala en el partido de Magdalena, provincia de Buenos Aires. Se realizaron muestreos estacionales durante dos años (2004-2005 y se aislaron e identificaron los hongos presentes. Se calculó la frecuencia relativa porcentual de cada taxón; estos datos fueron utilizados para evaluar la diversidad fúngica mediante el cálculo del Indice de Diversidad de Shanon y Weaver ( H '. Para discriminar las comunidades fúngicas se utilizó el coeficiente de similitud de Sorensen ( S '. Se identificaron 104 taxones de anamorfos de Ascomycota, de los cuales 54 fueron aislados de hojarasca y 58 de suelo, registrándose 8 especies en común para ambos tipos de muestra. De las especies compartidas, las que presentaron frecuencias más altas para hojarasca fueron las menos representadas en suelo y viceversa. El resultado del cálculo del coeficiente de similitud de Sorensen fue de 0.14, indicando que la comunidad de hongos saprótrofos que crece en la hojarasca de tala está integrada por diferentes especies a las que caracterizan la micobiota del suelo de la misma área. No se encontraron diferencias significativas en el índice de diversidad.In this paper we analyze the diversity of species that compose the saprotrophic (anamorphic Ascomycota fungi community in the leaf litter and soil in Celtis tala forest in Magdalena , located in the province of Buenos Aires . Seasonal samples were taken during two years (2004-2005, and fungi were isolated and identified. The relative frequencies of fungi were calculated. To compare the similarity of the fungi composition between different habitats, Sorensen's index of similarity (S´ was applied. The frequencies of occurrence of these fungi were recorded and Shannon Weaver index (H´ was applied to evaluate fungal

  11. Parasitismo larval de Crocidosema (=Epinotia aporema (Lepidoptera: Tortricidae en el noreste de la provincia de Buenos Aires (Argentina Larval parasitism of Crocidosema (=Epinotia aporema (Lepidoptera: Tortricidae in north-eastern Buenos Aires province (Argentina

    Directory of Open Access Journals (Sweden)

    Gerardo Liljesthröm

    2005-07-01

    Full Text Available En la interacción huésped-parasitoide las plantas suelen emitir señales capaces de aumentar la eficiencia de los parasitoides. Las larvas de Crocidosema (=Epinotia aporema (Walsingham se alimentan endofíticamente de leguminosas herbáceas y constituyen una plaga de la soja (Glycine max Merrill. En este estudio analizamos el parasitismo larval de C. aporema en Melilotus albus Medikus, Galega officinalis L, Lupinus albus L y G. max, en el noreste de Buenos Aires. La densidad larval fue mayor en L. albus (109,2 larvas/m² que en las restantes leguminosas: 3,7; 6,9 y 11,3 en M. albus, G. officinalis y G. max, respectivamente. Sin embargo, el parasitismo y número de especies parasitoides fueron menores en L. albus (9,5% por el ectoparasitoide generalista Bracon sp. que en M. albus (32,6%, Bracon sp. y los endoparasitoides Trathala sp.y Bassus sp.; G. officinalis y G. max (26,4% y 50,6% respectivamente, con Trathala sp. y Bracon sp. en ambas. Lupinus albus fue la única especie vegetal que reaccionó a la alimentación de C. aporema con producción de exudados pegajosos y olorosos que podrían haber repelido los endoparasitoides, actuando como un refugio parcial para C. aporema. Además, al ser positivamente seleccionada por C. aporema, esta leguminosa podría utilizarse como franja trampa para su control en cultivos de soja, de manera compatible con tácticas de control biológico por conservación de enemigos naturales.In host-parasitoid interactions, parasitoid efficiency may be increased by different quantity and quality of plant signals. Crocidosema (=Epinotia aporema (Walsingham is a pest on soybean, with larvae feeding endophitically on various herbaceous leguminosae. In this study we analyzed larval parasitism of C. aporema on Melilotus albus Medikus, Galega officinalis L, Lupinus albus L and Glycine max Merrill in the north-east of the Buenos Aires province. Larval density was higher on L. albus (109,2 larvae/m², than on the other

  12. Rodent diversity and habitat use in a protected area of Buenos Aires province, Argentina Diversidad y uso del hábitat por roedores en un área protegida de Buenos Aires, Argentina

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    Isabel E. Gómez-Villafañe

    2012-09-01

    Full Text Available Habitat use of rodents is associated to environmental variables, species requirements and biological interactions. The aim of this study was to analyse the macro and microhabitat use and spatial variation in the abundance of small wild rodents that inhabit Otamendi Natural Reserve, Argentina. We studied the rodent communities in 6 habitats: riparian forest, Celtis tala forest, lowland grassland, salt marsh and 2 highland grasslands. We captured a total of 153 individual of Scapteromys aquaticus, Akodon azarae, Oxymycterus rufus, Oligoryzomys flavescens, Deltamys kempi and O. nigripes, with a trapping effort of 3636 trap-nights. The species richness is maintained by the presence of different habitats that satisfy specific requirements from specialist and generalist species, using differentially the reserve and forming communities of different specific composition in each habitat. A differential macrohabitat use was observed by all species, and a certain level of selectivity at microhabitat scale was observed in individuals of 2 species. This study shows that the diversity of environments in the Otamendi Natural Reserve, which allows the maintenance of many wild species of small rodents; confirming the high ecological and conservational value of the reserves inside an urban region.El uso del habitat de los roedores está asociado a variables ambientales, requerimientos específicos e interacciones biológicas. El objetivo de este estudio fue analizar el uso del macro y microhábitat y la variación espacial en la abundancia de pequeños roedores que habitan la Reserva Natural Otamendi, Argentina. Estudiamos la comunidad de roedores en 6 ambientes: bosque ribereño, talares, pastizales bajos, pastizal salino y 2 pastizales altos. Capturamos 153 individuos de Scapteromys aquaticus, Akodon azarae, Oxymycterus rufus, Oligoryzomys flavescens, Deltamys kempi y O. nigripes, con un esfuerzo de 3 636 trampas-noche. La riqueza de especies se mantiene

  13. Obtención de un índice de riesgo de erosión eólica y su aplicación en la provincia de Buenos Aires, Argentina Erosion risk index attainment and its application in the Buenos Aires province, Argentina

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    Susana Goldberg

    2004-12-01

    of the wind erosion risk in Buenos Aires Province, Argentina.

  14. Seasonal and Inter-Annual Analysis of Chlorophyll-a and Inherent Optical Properties from Satellite Observations in the Inner and Mid-Shelves of the South of Buenos Aires Province (Argentina

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    Ana L. Delgado

    2015-09-01

    Full Text Available The aim of this study is to describe and understand the seasonal and inter-annual physical and biological dynamics of the inner and mid shelves of the Southwestern Buenos Aires Province (Argentina. We used chlorophyll-a (chl-a concentrations and inherent optical properties (IOPs, derived from ocean color products between 2002 and 2010, as a proxy for the physical and biological parameters of interest. This study focuses on the absorption by phytoplankton, aph(443, particulate backscattering, bbp(443, and absorption due to dissolved and particulate detrital matter, adg(443, and chl-a derived from a multiband quasi-analytical algorithm (QAA. A regionalization based on the coefficient of variation and the Census X-11 method were applied to define regions and to analyze the inter-annual and seasonal variability of the ocean color parameters, with regards to climate variability. The coastal zone presents the highest values of chl-a with two maxima in winter and autumn, while the mid-shelf shows a strong spring chl-a maximum. After 2009, all parameters under study shifted their seasonality and their magnitude changed over the entire area. In the coastal zone, mean values of aph(443 and bbp(443 increased, while in the mid-shelf, chl-a and aph(443 decreased. The observed inter-annual and seasonal behavior of the parameters is tightly related to climate variability of the study area.

  15. Cryptosporidium parvum GP60 subtypes in dairy cattle from Buenos Aires, Argentina

    Science.gov (United States)

    Cryptosporidium parvum from 73 dairy calves less than two months old from Buenos Aires province (Argentina) were molecularly characterized using sequence analysis of the GP60 gene. Seventy five sequences were obtained, and seven different subtypes were identified, all belonging to the IIa subtype f...

  16. Biostratigraphy and geochronology of the late Cenozoic of Córdoba Province (central Argentina)

    Science.gov (United States)

    Cruz, Laura Edith

    2013-03-01

    In the last twenty years, several geological and stratigraphical studies have been undertaken in Córdoba Province, and they have provided useful bases for biostratigraphic work in the late Cenozoic. However, paleontological contributions have been limited to preliminary analyses of mammal assemblages, or specific discoveries. The aim of this work is to contribute to biostratigraphic knowledge of Argentina through the study of late Cenozoic mammals from Córdoba Province. Five localities have been analyzed: San Francisco, Miramar, Río Cuarto, Isla Verde, and Valle de Traslasierra. Through biostratigraphic analysis the first records of several taxa were established, and mammal assemblages with the description and correlation of the sedimentary strata were confirmed. Finally, three Assemblage Zones (Biozonas de Asociación) were proposed: 1) Neosclerocalyptus paskoensis-Equus (Amerhippus) assemblage zone with type area and profile based on the San Francisco locality, referred to the Lujanian (late Pleistocene-early Holocene), and comparable to the Equus (Amerhippus) neogeus Biozone of Buenos Aires Province; 2) Neosclerocalyptus ornatus-Catonyx tarijensis assemblage zone with type area and profile based on the San Francisco locality, referred to the Ensenadan (early Pleistocene) and comparable to the Mesotherium cristatum Biozone of Buenos Aires Province, and 3) Nonotherium hennigi-Propanochthus bullifer assemblage zone with type area and profile based on the Los Sauces river, Valle de Traslasierra, referred to the Montehermosan-Chapadmalalan interval (Pliocene), and comparable to the Trigodon gaudryi, Neocavia depressidens and/or Paraglyptodon chapadmalensis Biozones of Buenos Aires Province.

  17. Endoparasitic infections in dogs from rural areas in the Lobos District, Buenos Aires province, Argentina Infecçóes endoparasitas em cães de áreas rurais do distrito de Lobos, província de Buenos Aires, Argentina

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    Marcela Cecilia Dopchiz

    Full Text Available Dogs are definite hosts for several zoonotic helminthes and protozoan. Rural areas from the Lobos District in the northeast of Buenos Aires province, Argentina, are mainly used for livestock activity, increasing in this way the number of dogs on farms as well as the human risk of parasitic infections. The aims of this research were to evaluate the endoparasitic infections in dogs from farms in the Lobos District and analyze their zoonotic importance as well as several risk practices and habits of the rural population. Forty-two dog fecal samples obtained in 21 farms were analyzed through coproparasitological methods and coproantigen tests, which resulted in an overall parasite prevalence of 69.05% and 80.95% of the parasitized farms. The most frequent parasites were Trichuris vulpis and Eucoleus aerophila (26.19%, Echinococcus granulosus (19.05%, Uncinaria stenocephala and coccids (14.29%. The analysis of epidemiological files showed several habits of the rural population considered as risk factors associated with the presence of fecal samples parasitized and the presence of E. granulosus on the farms. It is clear that people involved with the farms studied were exposed to several helminthes that could cause serious diseases like cystic echinococcosis, which can become an important public health issue and affect the economy worldwide.Os cães são hospedeiros definitivos de vários helmintos e protozoários zoonóticos. As áreas rurais do distrito de Lobos, no nordeste da província de Buenos Aires, Argentina, destinam-se principalmente à atividade pecuária aumentando desta forma o número de cães em fazendas, bem como o risco humano de infecções parasitárias. Os objetivos desta pesquisa foram avaliar as infecções endoparasitas em cães de fazendas do distrito de Lobos e analisar a sua importância zoonótica, bem como as práticas de risco e hábitos da população rural. Quarenta e duas amostras de fezes de cães obtidos em 21

  18. Tendencias en el uso de la tierra y diversidad productiva en establecimientos agropecuarios del centro-sur de la provincia de Buenos Aires (Argentina Tendencies in land use and productive diversity in central-south farms of the Province of Buenos Aires (Argentina

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    E. Requesens

    2011-06-01

    Full Text Available El partido de Benito Juárez, ubicado en el centro-sur de la provincia de Buenos Aires (Argentina, es ambientalmente heterogéneo y productivamente mixto, con tradición predominantemente ganadera. A fin de evaluar las tendencias en el uso de la tierra, se describió la evolución de los diferentes rubros productivos y su diversidad durante el periodo 1998-2007, sobre la base de una selección de 30 establecimientos. El pastizal natural ocupó la mayor proporción de superficie promedio en el período considerado, pero reflejó una pérdida de 23 puntos porcentuales compensada sólo parcialmente por un aumento de pasturas perennes. La suma de ambos recursos forrajeros evidenció una caída en la superficie destinada a ganadería y, al final del periodo, fue ligeramente superada por la superficie destinada a cultivos anuales. Entre éstos, la soja fue el cultivo con mayor expansión pero su participación relativa alcanzó sólo el 11,02%. Paralelamente, la diversidad productiva, estimada mediante una adaptación del índice de diversidad de Shannon, aumentó 30,84%. Aunque es evidente el avance de cultivos anuales en desmedro de pastizales naturales, el reemplazo parcial de estos últimos por pasturas perennes y el aumento en la diversidad productiva limitan los riesgos ambientales potenciales, puestos de manifiesto en otras regiones del país.Benito Juarez county, in the central-south Buenos Aires province (Argentina, is environmentally and productively heterogeneous, with predominance of cattle farming. In order to evaluate the tendencies in land use, the evolution of different productive items and their diversity throughout the period 1998- 2007 were described on the basis of 30 farms selected. The grasslands occupied the greater proportion of the area throughout the period studied, but they reflected a loss of 23 percentage points which was only partially compensated by an increase of perennial pastures. This fact caused a decrease in the

  19. Sistema de Justicia Juvenil en la Provincia de Buenos Aires, Argentina y métodos de evaluación / The Juvenile Justice System in the Province of Buenos Aires and evaluation methods

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    Jorge Folino

    2012-12-01

    Full Text Available Los objetivos del presente artículo son describir el sistema de justicia juvenil en la provincia de Buenos Aires (Argentina desde las perspectivas jurídica y ejecutiva, y comunicar avances científicos globales en la evaluación de los jóvenes que cometen actos disociales. En la provincia de Buenos Aires el sistema ha sido profundamente modificado en los últimos 15 años siguiendo las premisas de la Convención Internacional sobre los Derechos del Niño y dejando relegado el modelo del Patronato, que había regido previamente. Las instituciones encargadas de la ejecución de la intervención dispuesta por el Poder Judicial dependen actualmente de la Subsecretaria de Niñez y Adolescencia del Ministerio de Desarrollo Social y constan de centros cerrados, centros con régimen de semilibertad y centros de intervención ambulatoria (medidas alternativas a la prisión, tales como suspensión de juicio a prueba o tareas comunitarias. Las ciencias relacionadas con la salud mental y con el comportamiento vienen contribuyendo a la identificación de diversos factores influyentes en la conducta disocial y con el diseño de tipos de intervención para cada nivel de prevención. Sin embargo, hay una distancia importante entre las potencialidades del estado actual delconocimiento y la implementación. En las condiciones expuestas, queda configurado un período de transición que aún requiere optimización de la política de infancia con ajustes legislativos, judiciales y administrativos y con la capitalización de los aportes científicos.

  20. Extensión del límite austral de distribución de tres especies de peces óseos tropicales en la costa de la Provincia de Buenos Aires, Argentina Southern extension of three species of tropical bony fishes along the coast of Buenos Aires Province, Argentina

    OpenAIRE

    Andrés C Milessi; Jorge H Colonello; Federico Cortés; Lasta, Carlos A.; Juan A Waessle; Lucrecia Allega

    2012-01-01

    Se presentan tres nuevos registros de especies de peces óseos cuya distribución corresponde a aguas tropicales, capturados por buques pesqueros en la costa de la Provincia de Buenos Aires, Argentina (CPBA, 36°-38°S). Los ejemplares corresponden a las especies: Rachycentrum canadum, Elops saurus y Caulolatilus chrysops. Estos registros amplían significativamente el límite austral de su distribución. La presencia ocasional de estas especies está asociada al transporte de agua subtropical cálida...

  1. Hantavirus pulmonary syndrome in the Province of Rio Negro, Argentina, 1993-1996.

    Science.gov (United States)

    Cantoni, G; Lazaro, M; Resa, A; Arellano, O; Amestoy, A M; De Bunder, S; Herrero, E; Perez, A; Larrieu, E

    1997-01-01

    Early in 1995 the first case of Hantavirus Pulmonary Syndrome was serologically confirmed in El Bolsón (Province of Río Negro, Argentina), corresponding to the third outbreak reported in Argentina. A total of 26 cases of HPS related to the Andean region of Rio Negro Province, were reported from 1993 to 1996, 17 in El Bolsón, 4 in San Carlos de Bariloche, and 5 in Buenos Aires. The incidence rate was 5.03 x 100,000 with a mortality rate of 51.85 x 100. The occurrence of cases was mainly seasonal, with a significantly greater number in the spring, and the persons affected mainly lived in urban or periurban areas. In four cases, the affected individuals were members of a couple, spouses or live-in contacts. Seven cases were Health workers (physicians, nurses or administrative staff). Twelve cases were related among them, due to an outbreak of 80 days. Two of them did not visit the Andean region. A total of 139 rodents were captured and seven of them, Olygoryzomys longicaudatus, were found to be serologically positive. The possibility of infection by contact with rodents or fecal matter is being analyzed and also hypothesis related with interhuman transmission.

  2. Triatoma infestans in Greater Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Gajate P

    2001-01-01

    Full Text Available The Health Administration Agencies of many municipalities in Greater Buenos Aires (GBA receive frequent reports on triatomines in houses. The aim of this work was to identify and describe the dispersal foci of Triatoma infestans in an urban neighborhood of GBA, and contribute to the knowledge of the epidemiological situation in the region. In June 1998, potentially infested places were entomologically evaluated. T. infestans was only detected in a hen building for egg production, which housed approximately 6,000 birds. A total of 2,930 insects were collected. Density was about 9 triatomines/m². The proportions of fifth instar nymphs and adults were significantly higher than those of the other stages (p<0.001. The number of triatomines collected largely exceeded the highest domestic infestation found in one house from rural endemic areas of Argentina. Though triatomines were negative for Trypanosoma cruzi, they could acquire the parasite by coming in contact with infected people living in GBA. Besides, the numerous and widely distributed places housing hens and chickens, would favor the settlement of the vector. Together, both facts may constitute a risk of parasitic vectorial transmission. It is recommended to intensify systematic activities of vector search and case detection in GBA.

  3. Acerca De La Identidad Boliviana En Argentina. Un Análisis De Tres Casos De Estudio En La Provincia De Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Mercedes Mariano

    2015-08-01

    Full Text Available This paper is about the representations, practices and cultural expressions carried out by groups of Bolivian immigrants and their descendants in the cities of Olavarria, Tandil and Azul in the province of Buenos Aires, Argentina. For this purpose, the three case studies presented are analyzed based on the theoretical notions of identities and ethnic groups proper to the field of social anthropology. It thus seeks to contribute to knowledge about the construction of the identities of Bolivian immigrants in Argentina and, especially, to the discussion of those perspectives that propose the cultural assimilation of these groups into the host society.

  4. Caracterización de las comunidades de acridios (Orthoptera: Acridoidea del partido de Benito Juárez, sudeste de la provincia de Buenos Aires, Argentina Grasshopper (Orthoptera: Acridoidea community structure in Benito Juárez county, in outhern Buenos Aires province, Argentina

    Directory of Open Access Journals (Sweden)

    María Laura de Wysiecki

    2004-12-01

    que motivaron este cambio en la dominancia ya que no se cuenta con datos históricos, no pueden descartarse entre otros factores, eventuales cambios climáticos, campañas acridianas y contra otras plagas y el cambio en los patrones del uso de la tierra ocurridos en las últimas décadas en el área de estudio.The structure of grasshopper communities was studied at different sites in Benito Juárez county, Buenos Aires province, Argentina, over a six-year period (1997-2002. The sites were classified into five categories of disturbance: native grasslands, halophilous communities, pastures, moderately and highly disturbed pastures. A total of 23 grasshopper species was collected. Melanoplinae was the most abundant subfamily in all sites, except for halophilous communities that were characterized by the presence of one Acridinae species, Covasacris pallidinota (Bruner. Average species richness per site and per year, ranged from 2.10 ± 0.60 species in moderately disturbed pastures to 6.20 ± 0.58 species in halophilous communities. Cumulative species richness was: 17 in native grasslands, 14 in halophilous communities, 19 in undisturbed pastures, 18 in moderately disturbed pastures and 14 in highly disturbed pastures. Mean density was significantly higher in 2001 and 2002 than in the remaining years. The most abundant species were Dichroplus pratensis Bruner and Dichroplus elongatus Giglio-Tos in native grasslands and highly disturbed pastures; C. pallidinota in halophilous communities and D. elongatus - Scotussa lemniscata (Stål in undisturbed and moderately disturbed pastures. Along the study, the taxonomic structure of the grasshopper assemblages was significantly constant in native grasslands, halophilous communities and undisturbed pastures. The pattern of species distribution showed few species widely or intermediately distributed, whereas numerous species were rare. Among the 23 species collected, D. elongatus was the most broadly distributed of all. Historically

  5. Photovoltaic generating systems in rural schools in Neuquen Province, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Lawand, T.A.; Campbell, J. [Brace Research Institute, Quebec (Canada)

    1997-12-01

    During the period 1994-95, solar photovoltaic systems were installed at a number of schools in Neuquen Province, Argentina, by the Provincial electric utility, Ente Provincial de Energia del Neuquen. This was undertaken with funds provided by the Inter-American Development Bank. In all, there are 12 schools that have had photovoltaic generating systems installed. These generating systems are designed to provide electricity for the basic needs at the schools: primarily for lighting, and to operate small electrical appliances such as communication radios, televisions, VCR`s, AM/FM and short-wave radios. They do not provide enough energy to operate large consumption appliances such as washing machines, microwaves, refrigerators, power tools, etc. The program of provision of PV systems was supplemented with training on simple systems for cooking food or drying fruit, etc. These techniques are primarily intended for demonstration at the schools thus serving an educational role with the hope that they will be transmitted in time to the families of the students where the need is manifested the most.

  6. Assessment of natural arsenic in groundwater in Cordoba Province, Argentina.

    Science.gov (United States)

    Francisca, Franco M; Carro Perez, Magalí E

    2009-12-01

    Groundwater in the central part of Argentina contains arsenic concentrations that, in most cases, exceed the value suggested by international regulations. In this region, Quaternary loessical sediments with a very high volcanic glass fraction lixiviate arsenic and fluoride after weathering. The objectives of this study are to analyze the spatial distribution of arsenic in different hydrogeological regions, to define the naturally expected concentration in an aquifer by means of hydrogeochemistry studies, and to identify emergent health evidences related to cancer mortality in the study area. The correlation between arsenic and fluoride concentrations in groundwater is analyzed at each county in the Cordoba Province. Two dimensionless geoindicators are proposed to identify risk zones and to rapidly visualize the groundwater quality related to the presence of arsenic and fluoride. A surface-mapping system is used to identify the spatial variability of concentrations and for suggesting geoindicators. The results show that the Chaco-Pampean plain hydrogeologic region is the most affected area, with arsenic and fluoride concentrations in groundwater being generally higher than the values suggested by the World Health Organization (WHO) for drinking water. Mortality related to kidney, lung, liver, and skin cancer in this area could be associated to the ingestion of arsenic-contaminated water. Generated maps provide a base for the assessment of the risk associated to the natural occurrence of arsenic and fluoride in the region. PMID:19165608

  7. Elemental characterization of air particulate matter in Buenos Aires, Argentina

    International Nuclear Information System (INIS)

    Buenos Aires, the capital city of Argentina, is surrounded by 24 neighboring districts forming the so-called Buenos Aires metropolitan area (AMBA) that holds a population of 14 million people. In this work, the atmospheric aerosol of this metropolitan area was characterized through the determination of mass concentration, black carbon and elemental concentrations, on PM10 and PM2.5 samples taken using a 'Gent' sampler. The sampling site was located at an urban area characterized by fast and heavy traffic and samples were collected each third day, along 24 hours, between October 2005 and February 2006. A number of elements (As, Ba, Br, Ce, Co, Cr, Cs, Eu, Fe, Hf, La, Na, Rb, Sb, Sc, Se, Sm, Th, Yb and Zn) were determined by Neutron Activation Analysis and their results, as well as those of gravimetric mass concentrations, were compared with historical data. Enrichment factors were calculated for both fractions, using Sc as reference element and Mason's crustal concentration values, showing enrichment for As, Br, Sb, Se and Zn. Although the number of analyzed filters is still small, a preliminary factor analysis was run on both fraction results and different source profiles were found. The attribution of the sources to soil, high temperature processes including refuse incineration, fuel combustion and others, metal processes, traffic and other anthropogenic ones is discussed. (author)

  8. Elemental characterization of air particulate matter in Buenos Aires, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Jasan, Raquel C.; Pla, Rita R.; Invernizzi, Rodrigo [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Centro Atomico Ezeiza. Grupo Tecnicas Analiticas Nucleares], E-mail: jasan@cae.cnea.gov.ar, E-mail: rpla@cae.cnea.gov.ar; Santos, Marina dos [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Centro Atomico Constituyentes. Lab. de Contaminacion del Aire], E-mail: mdossant@cnea.gov.ar

    2007-07-01

    Buenos Aires, the capital city of Argentina, is surrounded by 24 neighboring districts forming the so-called Buenos Aires metropolitan area (AMBA) that holds a population of 14 million people. In this work, the atmospheric aerosol of this metropolitan area was characterized through the determination of mass concentration, black carbon and elemental concentrations, on PM10 and PM2.5 samples taken using a 'Gent' sampler. The sampling site was located at an urban area characterized by fast and heavy traffic and samples were collected each third day, along 24 hours, between October 2005 and February 2006. A number of elements (As, Ba, Br, Ce, Co, Cr, Cs, Eu, Fe, Hf, La, Na, Rb, Sb, Sc, Se, Sm, Th, Yb and Zn) were determined by Neutron Activation Analysis and their results, as well as those of gravimetric mass concentrations, were compared with historical data. Enrichment factors were calculated for both fractions, using Sc as reference element and Mason's crustal concentration values, showing enrichment for As, Br, Sb, Se and Zn. Although the number of analyzed filters is still small, a preliminary factor analysis was run on both fraction results and different source profiles were found. The attribution of the sources to soil, high temperature processes including refuse incineration, fuel combustion and others, metal processes, traffic and other anthropogenic ones is discussed. (author)

  9. Epidemiology of livestock fasciolosis in Mendoza province, Argentina

    International Nuclear Information System (INIS)

    Full text: Fasciolosis, parasitic disease caused by the trematode Fasciola hepatica, affects many mammals, particularly ruminants, and is now considered an important zoonotic disease. In Mendoza province, the data from the local slaughterhouses and observations made by veterinarians indicated that fasciolosis could be an important disease in cattle with 5,7% (1) liver condemnation registered which is well over the national average that oscillates yearly around 1%. Thus, even though fasciolosis seemed to be an important disease for livestock, the epidemiological information was lacking. Since the recent identification of the most efficient vector of fasciolosis in Mendoza, the introduced lymnaeid snail Galba truncatula (2), the epidemiological situation of fasciolosis needs to be addressed. Our objective was to gain insight in the epidemiology of fasciolosis in Mendoza province. Mendoza province is in the west of Argentina. To the east is a plains region and at the west are the Andes Mountains. The rivers run from the mountains in the west towards the east traversed by valleys were livestock is managed extensively and trashumance is a common practice To investigate the distribution of the lymnaeid snails, samples where recovered following an altitudinal gradient, from the plains region at 600 m.a.s.l. up to above 3000 m.a.s.l. In each sampling point, by means of a GPS, altitude, longitude and latitude was registered, water pH, conductivity and hardness evaluated, and the environmental characteristics of the site recorded. To investigate the possible reservoirs fasciolosis coprological studies were performed (Lumbreras rapid sedimentation and Formo-ether sedimentation) and liver inspection at the slaughterhouse was recorded. Lymnaeid snails where found in 27 sites, belonging to all of the river basins of Mendoza. The range of altitude was from 649 masl to 2971 masl, (μ1674). They were found in small streams with slow current in 18 sites (66,7%) small irrigation

  10. Marine diatoms from Buenos Aires coastal waters (Argentina: II. Thalassionemataceae and Rhaphoneidaceae Diatomeas marinas de aguas costeras de la Provincia de Buenos Aires (Argentina: II. Thalassionemataceae y Rhaphoneidaceae

    Directory of Open Access Journals (Sweden)

    EUGENIA A SAR

    2007-03-01

    Full Text Available This study describes the diversity of the species belonging to the diatom families Thalassionemataceae Round and Rhaphoneidaceae Forti frequently found in the temperate marine coastal waters of Buenos Aires Province, Argentina, from October 1994 to September 2000. It comprises morphological, taxonomic and distributional analysis of species found in planktonic samples collected at San Clemente del Tuyú, Santa Teresita, La Lucila del Mar, Mar de Ajó, Nueva Atlantis, Pinamar and Villa Gesell. Raw and cleaned samples were analysed with light and scanning electron microscopy. Four taxa of the genus Thalassionema Grunow ex Mereschkowsky amend. Hallegraeff, one of the genus Lioloma Hasle, two of the genus Delphineis Andrews and one of the genus Rhaphoneis Ehrenberg, were identified. Thalassionema pseudonitzschioides (Schuette & Schrader Hasle, Thalassionema synedriforme (Greville Hasle and Lioloma pacificum (Cupp Hasle in Hasle & Syvertsen are new records for ArgentinaEste estudio describe la diversidad de especies de diatomeas pertenecientes a las familias Thalassionemataceae Round and Rhaphoneidaceae Forti encontradas frecuentemente en aguas costeras marinas de la Provincia de Buenos Aires, Argentina, entre octubre de 1994 y septiembre de 2000. En él se lleva a cabo el estudio morfológico, taxonómico y distribucional de las especies halladas en muestras planctónicas colectadas en San Clemente del Tuyú, Santa Teresita, La Lucila del Mar, Mar de Ajó, Nueva Atlantis, Pinamar y Villa Gesell. Material sin tratar y tratado fue analizado con microscopio óptico y microscopio electrónico de barrido. Cuatro taxa de Thalassionema Grunow ex Mereschkowsky amend. Hallegraeff, uno de Lioloma Hasle, dos de Delphineis Andrews y uno de Rhaphoneis Ehrenberg, fueron identificados. Thalassionema pseudonitzschioides (Schuette & Schrader Hasle, Thalassionema synedriforme (Greville Hasle y Lioloma pacificum (Cupp Hasle in Hasle & Syvertsen son reportadas por

  11. Caracterización citomorfomérica de Anabaena circinalis (Cyanophyta en una proliferación masiva en el embalse Paso de Las Piedras (Provincia de Buenos Aires, Argentina Cytomorphometric characterization of Anabaena circinalis (Cyanophyta from a bloom in the lake Embalse Paso de las Piedras (Buenos Aires Province, Argentina

    Directory of Open Access Journals (Sweden)

    Gimena Argañaraz Bonini

    2005-07-01

    Full Text Available El objetivo principal de este trabajo fue realizar un tratamiento estadístico de los caracteres morfológicos de los individuos de Anabaena circinalis presentes en una proliferación masiva del Embalse Paso de las Piedras (Buenos Aires, Argentina cuya identidad se determinó mediante técnicas moleculares. Se plantearon como objetivos específicos de este trabajo: 1 analizar las dimensiones celulares y parámetros estadísticos de centralización y dispersión; 2 analizar la posición relativa de los heterocistos y las acinetas en el tricoma; 3 analizar la composición porcentual de los distintos tipos de células del tricoma; 4 analizar relación entre valores promedio del ancho y largo celular; y 5 analizar la variación del largo celular en células vegetativas de diferentes tricomas. Los resultados obtenidos sugieren que en condiciones eutróficas: 1 es posible caracterizar a los individuos de Anabaena circinalis mediante parámetros estadísticos referidos a las medidas de las células vegetativas de los tricomas, 2 el criterio basado en los caracteres morfológicos de las acinetas inmaduras no debe ser utilizado para ese fin, dadas la no-maduración de las acinetas en condiciones eutróficas y la tendencia a la uniformidad morfométrica entre las células vegetativas y las acinetas inmaduras, y 3 los heterocistos y las células vegetativas, uniformemente esféricos, sólo pueden diferenciarse entre sí por su tamaño y no por su forma, mientras que ambos a su vez pueden diferenciarse de las acinetas ovoidales por su forma. En cuanto al análisis de la varianza del largo de las células vegetativas, los resultados obtenidos confirman que todos los tricomas pertenecen a una misma especie.The principal goal of the work was to make a statistical analysis of the morphology of individuals of Anabaena circinalis growing in a bloom in Embalse Paso de las Piedras (Provincia de Buenos Aires, Argentina, identified by a gene probe for this species

  12. Mining and social conflict in the province of Buenos Aires

    Directory of Open Access Journals (Sweden)

    Agustina Girado

    2013-11-01

    Full Text Available The effects of extractive mining-exporter model, developed in Argentina in the light of neoliberal policies in the 1990s, is resisted by different local communities, who question both hegemonic narratives neo-development speech, as the existing governmental and business representations regarding the use and exploitation of the territory and environment. From a socio-anthropological perspective this article reflects on the social conflict generated in two middle-sized cities of the province of Buenos Aires (Tandil and Olavarría in relation to the canteril exploitation of Tandilia´s mountain system. At the same time, it allows the debate about the differential place of the environment, specifically the mountains, which occupies in different city projects and, for the other one, on specific linkages and relations among global processes, the positioning of national governments and local resistance.

  13. El turismo en la Atlántida norte. Estudio del Partido de la Costa. (Provincia de Buenos Aires - Argentina)

    OpenAIRE

    ANNESSI, GUSTAVO JAVIER

    2015-01-01

    [EN] Summary This doctoral thesis analyses the tourism system of La Costa District, which is located in the northeast of the Province of Buenos Aires (Argentina); in general terms, it studies the diffe-rent components and its multiple relations with the physical and natural environment as well as the living conditions of its population. In the last decades, one of the fastest demographic growth has taken place in La Costa District; this is also associated to its popularity as a holiday...

  14. El intrusivo López Lecube: Evidencias de magmatismo alcalino Gondwánico en el sector sudoeste de la provincia de Buenos Aires, Argentina The López Lecube intrusive: evidence of Gondwanic alkaline magmatism in south-western Buenos Aires Province, Argentina

    Directory of Open Access Journals (Sweden)

    D.A. Gregori

    2003-06-01

    Full Text Available El Intrusivo López Lecube, de edad Pérmica, aflora en el sector SO de la Provincia de Buenos Aires, desconectado de rocas ígneas o sedimentarias que le hagan de caja. Está compuesto por una serie sienítica y una granítica, constituidas principalmente por cuarzo, feldespato potásico, hornblenda, plagioclasa y cantidades menores de titanita, biotita y apatito. Las características geoquímicas de la serie sienítica indican que ella deriva de magmas de manto y muestran rasgos peraluminosos a metaluminosos. Estas rocas se encuentran enriquecidas en LILE y deprimidos en HFSE. La serie granítica presenta una composición que se extiende desde levemente metaluminosa a peraluminosa, indicando participación de componentes corticales en su génesis. Esta serie no deriva de la serie sienítica mediante procesos de cristalización fraccionada. El evento magmático que generó el Intrusivo López Lecube se correlaciona con el ciclo magmático Gondwánico que se desarrolló en las Provincias de La Pampa y Mendoza, debido a sus similitudes en edad y composición química.The Permian López Lecube intrusive crops out in south-western Buenos Aires province, and is isolated from other igneous or sedimentary rocks. It consists of syenitic and granitic suites, composed mainly of quartz, K-feldspar, hornblende, plagioclase and subordinate titanite, biotite and apatite. The geochemical characteristics of the syenitic suite indicate that it was derived from mantle magmas with peralkaline and metaluminous signatures. The rocks are enriched in LILE and depleted in HFSE. The granitic suite shows slightly metaluminous to peraluminous compositions, indicating the participation of a crustal component in its genesis. The granites are not derived via crystal fractionation from the syenitic suite. The López Lecube intrusive event can be correlated with the magmatic Gondwanic cycle developed in La Pampa and Mendoza Provinces, on the basis of similarities in age and

  15. Tourism, Transnationality and Ethnolinguistic Vitality: The Welsh in the Chubut Province, Argentina

    Science.gov (United States)

    Johnson, Ian

    2010-01-01

    This article aims to develop the concept of ethnolinguistic vitality by adopting a qualitative approach to vitality rather than the statistical approach traditionally used. Ten small-size focus group style interviews were held with members of the Welsh-Argentinean community in the Chubut Province in the south of Argentina in order to explore…

  16. HANTAVIRUS PULMONARY SYNDROME IN THE PROVINCE OF RIO NEGRO, ARGENTINA, 1993-1996

    Directory of Open Access Journals (Sweden)

    Gustavo CANTONI

    1997-07-01

    Full Text Available Early in 1995 the first case of Hantavirus Pulmonary Syndrome was serologically confirmed in El Bolsón (Province of Río Negro, Argentina, corresponding to the third outbreak reported in Argentina. A total of 26 cases of HPS related to the Andean region of Rio Negro Province, were reported from 1993 to 1996, 17 in El Bolsón, 4 in San Carlos de Bariloche, and 5 in Buenos Aires. The incidence rate was 5.03 x 100000 with a mortality rate of 51.85 x 100. The occurrence of cases was mainly seasonal, with a significantly greater number in the spring, and the persons affected mainly lived in urban or periurban areas. In four cases, the affected individuals were members of a couple, spouses or live-in contacts. Seven cases were Health workers (physicians, nurses or administrative staff. Twelve cases were related among them, due to an outbreak of 80 days. Two of them did not visit the Andean region. A total of 139 rodents were captured and seven of them, Olygoryzomys longicaudatus, were found to be serologically positive. The possibility of infection by contact with rodents or fecal matter is being analyzed and also hypothesis related with interhuman transmissionEm 1995, o primeiro caso de Síndrome Pulmonar pelo Hantavírus (HPS foi sorologicamente confirmado em El Bolsón (Província de Rio Negro, Argentina, correspondendo ao terceiro surto relatado na Argentina. Um total de 26 casos de HPS relacionados com a região Andina, Província de Rio Negro, foram relatados de 1993 a 1996, 17 em El Bolsón, 4 em São Carlos de Bariloche e 5 em Buenos Aires. O índice de incidência foi de 5,03 x 100.000 com índice de mortalidade de 51,85 x 100. A ocorrência de casos foi principalmente sasonal, com números significativamente maiores na primavera, e as pessoas afetadas viviam principalmente nas áreas urbanas e periurbanas. Em 4 casos, os indivíduos afetados eram membros de um casal, esposas ou viviam em contato. Sete casos eram trabalhadores da Saúde (m

  17. Close encounters Brazil and Argentina: Adhemar Gonzaga in Buenos Aires

    Directory of Open Access Journals (Sweden)

    Arthur Autran

    2013-12-01

    Full Text Available This paper focuses on the relations between the cinematography of Argentina and the cinematography of Brazil in the 1930s and 1940s, with the central axis Adhemar Gonzaga’s visit to Buenos Aires in 1934 and the contacts established there. The paper also discusses the tour of Hollywood star Ramón Novarro in South America, one of the motivations of the trip of Gonzaga.

  18. Market Report : The air pollution control market in Argentina

    International Nuclear Information System (INIS)

    This report presents some facts about how Canadian companies can work within the many innovative programs designed by the Canadian federal government to facilitate the export of Canadian products and services into the Argentine air pollution control market. As the economy stabilizes in Argentina, more effort is being given to issues of environmental protection and the Argentine government is increasing funding on environmental programs. The country is also strengthening its environmental legislation and increasing enforcement. The Kyoto and Montreal Protocols have brought attention to air quality issues such as climate change, emissions trading, and ozone depleting substances. Several initiatives currently focus on air quality monitoring and data collection since much information has to be gathered on air pollution levels. Emission control equipment for chemical, petrochemical, mining and power sectors are the best prospects for air pollution control, along with monitoring equipment, consulting services and fuel conversion equipment for vehicles and industrial plants. It was noted that there are legal and practical difficulties regarding new contract negotiations in Argentina, particularly with the decline in credit availability. This paper outlined the key factors shaping market growth. Most opportunities lies with projects funded by international financial institutions. The report includes a section on international competition, and the Canadian position for both private- and public-sector companies. A section on market logistics focused on issues such as direct sales, import regulations, and export credit risks. It is recommended that companies interested in the Argentine market contact the Embassy in Buenos Aires for information. refs., tabs

  19. Hydatidosis in the province of La Pampa, Argentina, 1998. Hidatidosis en la provincia de La Pampa, Argentina, 1998

    OpenAIRE

    Roberto Lamberti; Claudio Calvo; Arian Pombar; Lilia Gino; Emiliano Alvarez E.; Carlos Aguado; Edmundo Larrieu

    1999-01-01

    Echinococcus granulosus is the agent that causes the classical hydatidosis or cystic echinoccosis. The most spread cycle in South America is the sheep-dog cycle, and offers favorable conditions for the development of the parasite. As the province of La Pampa shows an endemic presence with notification of cases and infected dogs, the present work has the aim of contributing to the study of the distribution and prevalence of the disease in the distritc of Maracó, La Pampa, Argentina. Dogs of 36...

  20. El Género Nowakowskiella (Cladochytriaceae, Chytridiomycota en ambientes de la Pcia. de Buenos Aires (Argentina: Taxonomía, frecuencia y abundancia de las especies encontradas The genus Nowakowskiella (Cladochytriaceae, Chytridiomycota in environments of Buenos Aires Province (Argentina: Taxonomy, frequency and abundance of the found species

    Directory of Open Access Journals (Sweden)

    Agostina V. Marano

    2007-07-01

    Full Text Available El género Nowakowskiella comprende organismos acuáticos y terrestres, que se encuentran como saprótrofos principalmente sobre restos vegetales en descomposición. El género es citado por primera vez para Argentina y en esta contribución, se describen cuatro especies, analizándose su frecuencia y abundancia en los ambientes estudiados, brindándose una clave basada en caracteres morfológicos para diferenciarlas.The genus Nowakowskiella comprises aquatic and terrestrial organisms, which occur as saprotrophs on decomposed vegetable debris mainly. This genus is recorded for the first time in Argentina and in this contribution four species are described, analyzing their frequency and abundance in the studied environments and providing an identification key based on morphological characters to differentiate them.

  1. Wildlife vertebrate mortality in roads from Santa Fe Province, Argentina Mortalidad de vertebrados en caminos de la provincia de Santa Fe, Argentina

    Directory of Open Access Journals (Sweden)

    Andrés M. Attademo

    2011-09-01

    Full Text Available Mortality of vertebrates was monitored on 2 roads (National Road 168; NR168 and Provincial Road 1; PR1 in Santa Fe Province (Argentina from October 2007 to August 2008. These roads differed in traffic volume and surrounding landscape management conditions. We also investigated the influence of environmental variables (mean monthly air temperature and monthly total rainfall on the incidence of road kills. Two people monitored the roads on foot (1 000-m line transects, 3 times a month (36 samples per road. We found 2 024 vertebrate road killed specimens representing 61 species (7 amphibians, 15 reptiles, 32 birds, and 7 mammals. The toad Rhinella fernandezae was the most frequently killed species (n = 1307, 64.57%. NR168 had a higher incidence of vertebrate road kills, particularity for amphibians, whereas birds had a higher incidence of road kills on PR1. We found a positive correlation between precipitation and temperature with vertebrate road kills on PR1. We suggest that vertebrate road mortality is a very serious problem for the conservation of the biodiversity in Santa Fe Province-Argentina, therefore implementing mitigation measures will be necessary.Se estudió la mortalidad de vertebrados en 2 rutas (RP1: Ruta Provincial N° 1 y RN168: Ruta Nacional N° 168 de la Provincia de Santa Fe (Argentina desde octubre de 2007 hasta agosto de 2008. Estas rutas diferían en el tránsito vehicular y obras de infraestructura. Además, se investigó la influencia de variables climáticas (temperatura media mensual y precipitación total mensual con el atropellamiento de la fauna silvestre. Se realizaron de 2 a 3 transectos por mes de 1 000 m cada uno, los cuales fueron recorridos a pie por 2 observadores. Un total de 2 024 vertebrados fueron registrados distribuidos en 61 taxa (7 anfibios, 15 reptiles, 32 aves y 7 mamíferos. La especie más impactada fue el sapo Rhinella fernandezae (n = 1307, 64.57%. La RN168 presentó una alta abundancia de

  2. Estudios de interés tafonómico en los restos óseos humanos de Laguna Tres Reyes 1 (Partido de Adolfo Gonzales Chaves, provincia de Buenos Aires Taphonomic studies of human bones from Laguna Tres Reyes 1 (Gonzales Chaves District, Buenos Aires province, Argentina

    Directory of Open Access Journals (Sweden)

    Mariela Edith González

    2007-12-01

    Full Text Available En este trabajo se presentan los resultados del análisis de los efectos tafonómicos del registro bioarqueológico del sitio Laguna Tres Reyes 1 (Partido de Adolfo Gonzales Chaves, realizado en el marco de la tesis de licenciatura. La metodología consistió en el examen macroscópico de la superficie cortical de cada elemento esqueletal sobre el conjunto de entierros primarios. Las variables analizadas fueron: marcas de raíces, depositación química (carbonato de calcio y manchas de manganeso, pérdida ósea, fracturas, actividad de roedores, acción de carnívoros, marcas de excavación y limpieza, meteorización e integridad. Los resultados indican la interacción de una serie de agentes y procesos tafonómicos sobre los huesos humanos que condujeron a una historia tafonómica compleja y de baja intensidad, permitiendo una muy buena preservación del tejido óseo. Los roedores han perturbado este registro fundamentalmente en el aspecto distribucional dejando escasas marcas de su accionar sobre los elementos óseos. Por otro lado, existen evidencias de la acción de pequeños carnívoros sobre algunos esqueletos que sugieren que estos animales habrían accedido a ellos deslizándose por los túneles y cuevas excavados por los roedores.This paper presents the results of taphonomic research carried out on the bioarchaeological record of the Laguna Tres Reyes 1 site (Buenos Aires Province, Argentina. The variables analyzed were root etching, chemical deposition (calcium carbonate coating and manganese staining, bone destruction, fractures, rodent and carnivore activities, excavation and cleaning marks, weathering, and bone integrity. Based on a macroscopic examination of the surface of the human bones found at the site, this study shows that the skeletons were affected by the activity of small rodents, which left scarce traces on the bones. It is also suggested that small-sized carnivores were able to reach the burials through tunnels

  3. Oribátidos arborícolas del «Paseo del Bosque» (La Plata, provincia de Buenos Aires, Argentina Canopy soil suspendend oribatids from the «Paseo del Bosque» (La Plata, province of Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Ana Salazar Martínez

    2007-07-01

    Full Text Available En esta nota se aporta información sobre los oribátidos arborícolas del Paseo del Bosque, La Plata, Argentina (34º 54' S, 57º 55' W, a partir de muestreos realizados en suelos suspendidos con distinta concentración de detritos. La fauna de oribátidos estuvo representada por 17 especies, siendo Cultroribula sp., Pheroliodes cf. minutus Baranek, Rhysotritia peruensis Hammer y Oppiella nova Oudemans las de mayor importancia relativa. De las especies registradas, 76 % son propias del ambiente arborícola.This work deals with the arboreal oribatids of «Paseo del Bosque», La Plata, Argentina (34º 54' S, 57º 55' W. Samples were taken from suspended soils exhibiting unequal detritus concentrations. The overall sample included 17 oribatid species, exhibiting Cultroribula sp., Pheroliodes cf. minutus Baranek, Rhysotritia peruensis Hammer and Oppiella nova Oudemans the highest relative importance. Seventy percent of the recorded species are representative of the arboricole environment.

  4. Avifauna (Passeriformes of Santa Cruz province, Patagonia (Argentina: annotated list of species Avifauna (Passeriformes de la provincia de Santa Cruz, Patagonia (Argentina: lista comentada de especies

    Directory of Open Access Journals (Sweden)

    Carlos Aquiles Darrieu

    2009-06-01

    Full Text Available The birds (Passeriformes of Santa Cruz province, Argentina, are analyzed based on three main sources: specimens housed in the Museo Argentino de Ciencias Naturales of Buenos Aires (MACN, in the Félix de Azara Collection, Buenos Aires (CFA, in the Museo de La Plata, La Plata (MLP, in the Fundación Miguel Lillo, Tucumán (FML and in the National Museum of Natural History, Washington (USNM. The data were obtained from bibliographical citations which include precise localities and from field observations. A list of 75 species belonging to 13 families is included. First records with precise localities are provided for five species. New localities are cited for 64 species.En el presente trabajo se aporta una lista comentada de todas las especies de aves Passeriformes registradas en la provincia de Santa Cruz. Los ejemplares de colección pertenecen al Museo Argentino de Ciencias Naturales y a la Colección Félix de Azara, ambos de Buenos Aires, al Museo de La Plata, a la Fundación Miguel Lillo de Tucumán y al National Museum of Natural History, Washington. Los datos fueron obtenidos de la literatura, del análisis de especimenes de museos y de observaciones de campo. Esto nos permitió incluir un total de 75 especies pertenecientes a 13 familias. Cinco de ellas no presentaban registros concretos para la provincia, aportándose nuevas localidades para otras 64.

  5. Quaternary basaltic volcanism in the Payenia volcanic province, Argentina

    DEFF Research Database (Denmark)

    Søager, Nina

    Pleistocene times. These basalts mark the end of a period of shallow subduction of the Nazca slab beneath the Payenia province and volcanism in the Nevado volcanic field apparently followed the downwarping slab in a north-northwest direction ending in the Northern Segment. The northern Payenia basalts...

  6. Transmission questioned. Youth, awareness, and memory of repression at Posadas Hospital, in Buenos Aires, Argentina

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    Emilio Crenzel

    2011-07-01

    Full Text Available This paper analyses popular wisdom and memory transmission regarding State terrorism and forced disappearance, which are circulating among youth living around Hospital Posadas, located in Haedo, a province to Buenos Aires, Argentina. At this hospital, there was, under the military dictatorship (1976-1983, a Clandestine Imprisonment Center, where people were kept prisoner as disappeared. Therefore, at this facility both practices of health restoration and torture and murder perpetration coexisted. Through thirty indepth interviews carried out among neighbor young people, the existence of manifold knowledge fractures and memory transmission about State violence is verified, being a result from the social relations breakthrough that used to articulate the neighborhood and the hospital, and from the material life conditions promoting undifferentiated historical and political time awareness.

  7. Ergonomic analysis for elementary school teachers. Preliminary trial for elementary schools in the province of Buenos Aires.

    Science.gov (United States)

    Cuenca, Gabriela; Nusshold, Patricio

    2012-01-01

    This article presents the results of a preliminary trial, in the context of an intervention, developed by a team of ergonomists under the request of the Occupational Health Department of the General Management of Schools in the Province of Buenos Aires, Argentina. We present a reformulation of the request and the results obtained in 2009 from observations and interviews held in three schools in the province of Buenos Aires in which different jobs positions were assessed. From this stage onwards, the tools were validated and new aspects were shown, particularly in relation to the high variety of real situations in the education sector.

  8. Reptiles escamosos (Squamata del Pleistoceno Medio del Norte de la ciudad de Mar del Plata (provincia de Buenos Aires, Argentina

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    Santiago Brizuela

    2015-05-01

    Full Text Available In this study, we describe two fossil remains of squamate reptiles found in Middle Pleistocene outcrops at the northern marine cliffs of the city of Mar del Plata (Buenos Aires province. The specimens were found forming a taphocenosis with remains of other microvertebrates (amphibians, mammals and birds. The reptiles recognized in the association are represented by remains of an undetermined colubrid, and the anguid Ophiodes sp. This latter finding represents the first fossil record for the family Anguidae exhumed in Argentina.

  9. - Bacillus anthracis, utilización de un Sistema de Información Geográfico (SIG, para el análisis espacio temporal de 54 brotes de carbunclo rural en el partido de Azul, Bs. As., Argentina (Bacillus anthracis, use of a Geographical infoormation Service (GIS, for the temporary space analysis of 54 outbreaks of rural anthax in the county of Azul, Province of Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Vazquez P.

    2006-02-01

    Full Text Available Resumen. El objeto de este trabajo es utilizar un Sistema de Información Geográfico (SIG para el análisis epidemiológico del Carbunclo Rural aplicado a un ecosistema ganadero, integrado por 618.000 bovinos, distribuidos en 1.350 establecimientos del partido de Azul, Provincia de Buenos Aires, Argentina. Esto permitió estudiar hechos epidemiológicos de una enfermedad de antigua data como es el Carbunclo Rural. Su agente causal el Bacillus anthracis, posee la característica de formar esporos que permite mantenerse durante decenas de años en el ambiente com capacidad de transmitir la enfermedad a otrois animales susceptibles. Se describe la metodología para su diagnóstico y los distintos elementos que integran el Sistema de Información Geográfico. Los 54 brotes identificados entre los años 1989 / 2005 fueron georreferenciados para posteriormente relacionarlos con las vías de avenamiento de aguas del partido de Azul, lãs características de sus suelos y la ubicación de las poblaciones de las poblaciones rurales que comparten la zona de isorriesgo. Se plantea un sistema de alerta epidemiológico temprano para establecimientos ganaderos que comparten vías de avenamiento de agua en común con el brote de Carbunclo diagnosticado. El 93 % de los brotes ocurrieron en establecimientos que comparten vías de avenamiento, mientras que el 7 % restante en establecimientos ganaderos ubicados fuera del área de influencia de estas vías Summary. The objjective of this study was the use of a Geographical Information Service (GIS for the epidemiologiacal analysis of rural Anthrax applied to a catle ecosystem, which includes 618.000 cattle, distributed on 1.350 farms in the county of Azul, Province of Buenos Aires, Argentina. This allowed studying long past epidemiological occurrences of a disease such as rural carbuncle Its causing egent is Bacillus anthracis, which has the property of forming spores That permit being maintained dozens of years in

  10. Nuevas citas de Asteraceae para la provincia de Catamarca (Argentina New records of Asteraceae for the province of Catamarca (Argentina

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    Susana E. Freire

    2011-06-01

    Full Text Available Se mencionan los siguientes nuevos registros de Asteráceas para la provincia de Catamarca, Argentina: Baccharis acaulis, B. boliviensis var. latifolia, B. flexuosa, B. glutinosa var. angustissima, B. stenophylla (Tribu Astereae, Eupatorium patens var. tomentosum (Tribu Eupatorieae, Cosmos bipinnatus, C. peucedanifolius var. peucedanifolius, Helianthus annuus (Tribu Heliantheae, Gamochaeta erythractis, G. longipedicellata, Gnaphalium lacteum, Tessaria integrifolia var. integrifolia (Tribu Inuleae, Chuquiraga ruscifolia (Tribu Mutisieae, Senecio crepidifolius, S. subulatus var. subulatus, Xenophyllum incisum var. incisum (Tribu Senecioneae. Se citan además el hábitat de los taxones y las provincias fitogeográficas que integran. Se propone una nueva combinación, Baccharis glutinosa Pers. var. angustissima (DC. Giuliano.The following Asteraceae are mentioned for the province of Catamarca: Baccharis acaulis, B. boliviensis var. latifolia, B. flexuosa, B. glutinosa var. angustissima, B. stenophylla (Tribe Astereae, Eupatorium patens var. tomentosum (Tribe Eupatorieae, Cosmos bipinnatus, C. peucedanifolius var. peucedanifolius, Helianthus annuus (Tribe Heliantheae, Gamochaeta erythractis, G. longipedicellata, Gnaphalium lacteum, Tessaria integrifolia var. integrifolia (Tribe Inuleae, Chuquiraga ruscifolia (Tribe Mutisieae, Senecio crepidifolius, S. subulatus var. subulatus, Xenophyllum incisum var. incisum (Tribe Senecioneae. The habitat and phytogeographic provinces of the taxa are mentioned. The following new combination is proposed: Baccharis glutinosa Pers. var. angustissima (DC. Giuliano.

  11. Argentina.

    Science.gov (United States)

    1993-02-01

    Background notes on Argentina provide a profile of the geography, selected demographic features, government and economic conditions. Descriptive text includes a discussion of the people, their history and political conditions, the government and officials, the state of the economy, their defense, foreign relations, and relations with the US. The 1992 estimated population was about 33 million of whom 97% are European (mostly Spanish and Italian). Religions represented are Roman Catholic (92%), Protestant (2%), Jewish (2%), and other (4%). Adult literacy is 95%. 36% are engaged in industry and commerce, 20% in services, 19% in agriculture, 6% in transport and communications, and 19% other. Per capita gross domestic product was $4,500. There are only 50,000 native Indians remaining in peripheral provinces. The population enjoys a high standard of living and a low growth rate. The country was shaped by dominant forces: modern agricultural techniques and the integration of the country into the world economy. Foreign investment aided the economic revolution. Conservative and radical rule has swung the country back and forth politically since 1916. Colonel Juan Domingo Peron led a successful military coup in 1943 and was elected in 1946. Policies were instituted to give a greater voice to the working class, and with the influences of his wife, women's groups. In 1955, he was ousted by the military, which failed to revive the economy and quiet increasing terrorism. After a number of difficult elections, Peron was reinstated as president in 1973. Extremists on the left and right threatened public order; the military as a consequence imprisoned persons indefinitely. Peron's wife succeeded him after his death, but was removed from office in the military coup of 1976. Basic human rights were violated during this period. By 1983, a fair election was held and support increased for a democratic system. In 1989, Carlos Saul Menem, a Peronist candidate, won and established

  12. Mites (Acari: Laelapidae associated with sigmodontinae rodents in Entre Ríos Province, Argentina

    Directory of Open Access Journals (Sweden)

    Abba Agustín M

    2001-01-01

    Full Text Available The richness, diversity, abundance and prevalence of mite species associated with sigmodontine rodents of different species in Entre Ríos province, Argentina are studied. Five of the six species of mites were reported for the first time in the study area. The richness and diversity of mites was higher on Oligoryzomys flavescens and O. delticola than on Akodon azarae. Androlaelaps rotundus was dominant and exhibited higher values of mean abundance and prevalence on A. azarae, Mysolaelaps microspinosus on O. flavescens and Gigantolaelaps mattogrossensis on O. delticola.

  13. Bajada de rahue, province of neuquen, Argentina: an interstadial deposit in northern Patagonia

    Science.gov (United States)

    Markgraf, Vera; Bradbury, J.P.; Fernandez, J.

    1986-01-01

    Pollen and diatom analyses of a radiocarbon dated lacustrine section in the temperate Andean region of Argentina (Rahue, Province Neuquen) suggest interglacial type climatic conditions between 27,000 and 33,000 yr B.P., with environments that resemble the modern conditions at the locality. This finding correlates with a woodland record from central Chile, interpreted as reflecting conditions substantially warmer and drier prior to 27,000 yr B.P. than during the following full-glacial period. It also appears to relate to the global paleoclimatic scheme derived from deep-sea records, suggesting interhemispheric synchroneity of such broad-scale palaeoclimatic phases. ?? 1986.

  14. Conservación del ombusillo, planta amenazada de la Provincia de Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Marcelo Paulo Hernández

    2009-10-01

    Full Text Available Conserving ombusillo, an endangered plant from the province of Buenos Aires, Argentina Resumen: Phytolacca tetramera Hauman “ombusillo”, es una especie vegetal endémica del SE de la Provincia de Buenos Aires, Argentina, que se halla en peligro crítico de extinción. Su principal factor de amenaza es la reducción del hábitat por acción antrópica. Esta especie presenta principios activos fungicidas y, posiblemente, dada su afinidad con otras especies del mismo género, presente compuestos antivirales, antitumorales, bactericidas e insecticidas. Se realizaron ensayos de macropropagación con distintas concentraciones de reguladores de crecimiento de tipo auxínicos que muestran claramente un enraizamiento óptimo correspondiente a segmentos de ejes aéreos vegetales “estacas” sometidas a 300 ppm de ácido indol butírico y a segmentos de tallos subterráneos sin aplicación de hormonas. Así mismo, se realizaron ensayos de germinación, en condiciones de luz y de oscuridad, comprobándose que las semillas presentan fotoblastismo positivo con un porcentaje de germinación del 65%, el cual disminuye enormemente luego del año de cosecha.Palabras clave: Phytolacca tetramera; endémica; maropropagación; germinación. Abstract:  Phytolacca tetramera Hauman “ombusillo” is an endemic plant species which is in critical danger of becoming extinct; it comes from the south-east of the province of Buenos Aires. The main factor threatening this species is the reduction of its natural environment by antropic action.This species has antifungal properties and, due to its relationship with other species from the same genus, it could also have antiviral, antitumour, antibacterial and insecticidal compounds. Macropropagation experiments were carried out using different concentrations of auxinic growth regulators. Segements of aerial axis “stakes” treated with 300 ppm of indol-butiric acid and segments of

  15. The Economic Impact of Cystic Echinococcosis in Rio Negro Province, Argentina.

    Science.gov (United States)

    Bingham, Glenda M; Larrieu, Edmundo; Uchiumi, Leonardo; Mercapide, Carlos; Mujica, Guillermo; Del Carpio, Mario; Hererro, Eduardo; Salvitti, Juan Carlos; Norby, Bo; Budke, Christine M

    2016-03-01

    Cystic echinococcosis (CE), a parasitic zoonosis with substantial human health and economic consequences, is highly endemic in Rio Negro Province, Argentina. The objective of this study was to estimate the direct and indirect human and livestock-associated monetary losses attributable to CE, in Rio Negro Province, for the year 2010. Human costs were estimated using data obtained from hospital chart reviews, patient interviews, and government reports. Livestock-associated losses were estimated using data from government reports and scientific publications. Spreadsheet models were developed utilizing Latin Hypercube sampling to account for uncertainty in the input parameters. In 2010, the estimated total cost of CE, in Rio Negro Province, ranged from US$4,234,000 (95% credible interval [CI]: US$2,709,000-US$6,226,000) to US$5,897,000 (95% CI: US$3,452,000-US$9,105,000), with livestock-associated losses representing between 80% and 94% of the total losses, depending on whether non-healthcare-seeking human cases were included and if livestock slaughter values were adjusted to account for underreporting. These estimates suggest that CE is responsible for considerable human and livestock-associated monetary losses in Rio Negro Province. Stakeholders and policymakers can use these data to better allocate public health and agricultural resources for this region. PMID:26787144

  16. Birds in the Daily Life of the Toba Indigenous People from the West of the Province of Formosa (Argentina)

    OpenAIRE

    Gustav F. Scarpa

    2010-01-01

    Review of Birds in the Daily Life of the Toba Indigenous People from the West of the Province of Formosa (Argentina). Pastor Arenas & Gustavo Porini. 2009. Tiempo de Historia, Asunción. Pp. 300 + xxvi. $27.00 (paperback). ISBN 9789995381660.

  17. Sr, Nd, Pb and Hf isotopic constraints on mantle sources and crustal contaminants in the Payenia volcanic province, Argentina

    DEFF Research Database (Denmark)

    Søager, Nina; Holm, Paul Martin; Thirlwall, Matthew F.

    2015-01-01

    The presented Sr, Nd, Hf and double-spike Pb-isotopic analyses of Quaternary basalts from the Payenia volcanic province in southern Mendoza, Argentina, confirm the presence of two distinct mantle types feeding the Payenia volcanism. The southern Payenia mantle source feeding the intraplate-type Río...

  18. Fluctuación estacional de Aedes aegypti en Chaco, Argentina Seasonal fluctuation of Aedes aegypti in Chaco Province, Argentina

    Directory of Open Access Journals (Sweden)

    Marina Stein

    2005-08-01

    Full Text Available OBJETIVO: Estudiar la fluctuación estacional de Aedes aegypti y correlacionar su abundancia con factores ambientales. MÉTODOS: Las colectas fueron realizadas entre octubre de 2002 y noviembre de 2003, en la ciudad de Resistencia, província del Chaco, Argentina. Fueron hechos muestreos semanales empleando ovitrampas. El número de huevos colectados fue correlacionado con la temperatura, humedad relativa ambiente, evaporación y precipitaciones registradas en dicha localidad. Se utilizó el test de correlación de Pearson con los respectivos datos climáticos semanales, realizándose correlaciones simples y múltiples. RESULTADOS: La ocurrencia de huevos fue registrada de manera discontinua, desde la última semana de octubre de 2002, hasta la última de junio de 2003, a partir de la cual no fueron encontrados hasta noviembre de 2003. Se observó un pico de abundancia (70% en noviembre y diciembre, que coincidió con el período de temperaturas altas y mayores precipitaciones. Otro pico, aunque de menor importancia, fue observado en abril y coincidió con las lluvias de otoño. Las correlaciones fueron significativas solamente para las precipitaciones acumuladas mensuales (r=0,57; POBJECTIVE: To study the seasonal fluctuation of Aedes aegypti and to correlate its abundance with climate conditions. METHODS: Samples were weekly collected in ovitraps in the city of Resistencia, Chaco Province, Argentina, between October 2002 and November 2003. The number of eggs collected was correlated with temperature, relative humidity, evaporation and rainfalls recorded. Pearson's correlation test with the respective weekly climate data was used in single and multiple correlation analyses. RESULTS: The first record of eggs took place in the last week of October 2002 and continued irregularly up to the last week of June 2003, when no more eggs were seen until November 2003. The highest peak of abundance (70% was observed in November-December 2002, which

  19. Équidos y Gonfoterios del Pleistoceno tardío de San Pedro, provincia de Buenos Aires, Argentina

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    Prado, J. L.

    2012-12-01

    Full Text Available Mammal fossil remains from San Pedro (Buenos Aires Province, Argentina are very poorly known. In this paper, best preserved specimens of Equidae and Gomphotheriidae are described. They come from “Campo Spósito” quarry near San Pedro city. The quarry was referred to Lujanian Age, Biozone of Equus (Amerhippus neogeus. We conducted a comparative study with other South American horse and gomphothere remains, mainly from Argentina and Brazil, allow their identification as Equus (Amerhippus neogeus, Hippidion principale and Stegomastodon cf. S. platensis. Two absolute dates were obtained by the method of OSL: 37626±4198 y 41554±3756 years BP. Based on this data and correlation with other localities we referred this bed to oxygen isotopic stage 3.

    Los mamíferos fósiles de la localidad de San Pedro (provincia de Buenos Aires, Argentina son escasamente conocidos. En este artículo se describen ejemplares mejor conservados de Equidae y Gomphotheriidae. Estos restos provienen del yacimiento “Campo Spósito”, ubicado en las proximidades de la ciudad de San Pedro. Los sedimentos portadores son referibles al Piso/Edad Lujanense, Biozona de Equus (Amerhippus neogeus. Se realizó un estudio comparativo con caballos y gonfoterios de Argentina y Brasil para identificar los siguientes taxa: Hippidion principale, Equus (Amerhippus neogeus y Stegomastodon cf. S. platensis. Se obtuvieron dos dataciones por Luminiscencia Ópticamente Estimulada para la secuencias estratigráfica de: 37626±4198 y 41554±3756 años AP, respectivamente. Estos datos sitúan el yacimiento en el Pleistoceno Superior (estadio 3 del oxígeno isotópico.

  20. Spatial analysis of the tuberculosis treatment dropout, Buenos Aires, Argentina

    Science.gov (United States)

    Herrero, María Belén; Arrossi, Silvina; Ramos, Silvina; Braga, Jose Ueleres

    2015-01-01

    OBJECTIVE Identify spatial distribution patterns of the proportion of nonadherence to tuberculosis treatment and its associated factors. METHODS We conducted an ecological study based on secondary and primary data from municipalities of the metropolitan area of Buenos Aires, Argentina. An exploratory analysis of the characteristics of the area and the distributions of the cases included in the sample (proportion of nonadherence) was also carried out along with a multifactor analysis by linear regression. The variables related to the characteristics of the population, residences and families were analyzed. RESULTS Areas with higher proportion of the population without social security benefits (p = 0.007) and of households with unsatisfied basic needs had a higher risk of nonadherence (p = 0.032). In addition, the proportion of nonadherence was higher in areas with the highest proportion of households with no public transportation within 300 meters (p = 0.070). CONCLUSIONS We found a risk area for the nonadherence to treatment characterized by a population living in poverty, with precarious jobs and difficult access to public transportation. PMID:26270011

  1. Spatial analysis of the tuberculosis treatment dropout, Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    María Belén Herrero

    2015-01-01

    Full Text Available OBJECTIVE Identify spatial distribution patterns of the proportion of nonadherence to tuberculosis treatment and its associated factors.METHODS We conducted an ecological study based on secondary and primary data from municipalities of the metropolitan area of Buenos Aires, Argentina. An exploratory analysis of the characteristics of the area and the distributions of the cases included in the sample (proportion of nonadherence was also carried out along with a multifactor analysis by linear regression. The variables related to the characteristics of the population, residences and families were analyzed.RESULTS Areas with higher proportion of the population without social security benefits (p = 0.007 and of households with unsatisfied basic needs had a higher risk of nonadherence (p = 0.032. In addition, the proportion of nonadherence was higher in areas with the highest proportion of households with no public transportation within 300 meters (p = 0.070.CONCLUSIONS We found a risk area for the nonadherence to treatment characterized by a population living in poverty, with precarious jobs and difficult access to public transportation.

  2. Under the rainbow : the Civil Union Law and sexual minority activism in Buenos Aires, Argentina

    OpenAIRE

    2008-01-01

    The subject of this thesis is the implementation of the Civil Union Law in Buenos Aires, Argentina. The law was the first one in Latin America to recognize same-sex couples. The law is a result of changing conceptions of homosexuality in Argentina during the last few decades. In this time period Argentina has made the transition from an oppressive dictatorship to democracy. Argentina’s recent history has brought about a public awareness about human rights and the AIDS epidemic generated a pub...

  3. Saprolegnia oliviae sp. nov. isolated from an Argentine river (Tierra del Fuego Province, Argentina).

    Science.gov (United States)

    Steciow, Mónica Mirta

    2003-02-28

    Saprolegnia oliviae sp. nov. is described from litter (floating dead twigs, leaves and roots) in the Olivia River, Ushuaia Department, Tierra del Fuego Province (Argentina). The new species is illustrated and compared with other species of the genus. Distinguishing characteristics of S. oliviae are the production of smooth oogonia (with some lateral or terminal projections) and the absence of antheridial branches on the majority of the oogonia, but when present, they are mostly diclinous, at times oogonia are supplied with androgynous and monoclinous antheridial branches. The oogonial stalks are predominantly short and straight or long and bent, curved or many times coiled; oospores are distinctive subcentric, (1-) 15-50 (-70) per oogonium. Morphological details of the new species and its comparison with other described species are discussed here. PMID:12620629

  4. Thamnocephalus chacosaltensis, a new species of Anostraca (Crustacea: Branchiopoda) from Salta province (Argentina).

    Science.gov (United States)

    Cohen, Rosa Graciela

    2016-03-07

    Thamnocephalus chacosaltensis, a new species of fairy shrimp, was found in a temporary turbid pond in the Rivadavia Department, Salta province, Argentina (24º13'19.3''S; 62º 52'14.3''W), belonging to the Chaco salteño. The males present a well developed frontal appendage. Their First (FB) and Third (TB) branches show features diagnostic for the species. FB shows three sub-branches; the most proximal one is coiled, lacks spines all along, gradually thins in distal direction and flattens in the distal half; distally, the flattened portion is folded and ends blunt, bearing a small spine at the tip. TB is a broad-based triangular, thin, much flattened and folded outgrowth, with a small spine at the apex. Male genital and abdominal segments lack medio-ventral spines near their posterior margins. Comparisons with the other species of the genus are established.

  5. Lamniform shark teeth from the late cretaceous of southernmost South America (Santa Cruz province, Argentina).

    Science.gov (United States)

    Schroeter, Elena R; Egerton, Victoria M; Ibiricu, Lucio M; Lacovara, Kenneth J

    2014-01-01

    Here we report multiple lamniform shark teeth recovered from fluvial sediments in the (Campanian-Maastrichtian) Cerro Fortaleza Formation, Santa Cruz Province, Argentina. This small tooth assemblage is compared to various lamniform sharks possessing similar dental morphologies, including Archaeolamna, Cretalamna, Dwardius, Dallasiella, and Cretodus. Although the teeth share numerous morphological features with the genus Archaeolamna, including a developed neck that maintains a relatively consistent width along the base of the crown, the small sample size and incomplete nature of these specimens precludes definitive taxonomic assignment. Regardless, the discovery of selachian teeth unique from those previously described for the region broadens the known diversity of Late Cretaceous South American sharks. Additionally, the discovery of the teeth in fluvial sandstone may indicate a euryhaline paleobiology in the lamniform taxon or taxa represented by this tooth assemblage.

  6. Lamniform shark teeth from the late cretaceous of southernmost South America (Santa Cruz province, Argentina.

    Directory of Open Access Journals (Sweden)

    Elena R Schroeter

    Full Text Available Here we report multiple lamniform shark teeth recovered from fluvial sediments in the (Campanian-Maastrichtian Cerro Fortaleza Formation, Santa Cruz Province, Argentina. This small tooth assemblage is compared to various lamniform sharks possessing similar dental morphologies, including Archaeolamna, Cretalamna, Dwardius, Dallasiella, and Cretodus. Although the teeth share numerous morphological features with the genus Archaeolamna, including a developed neck that maintains a relatively consistent width along the base of the crown, the small sample size and incomplete nature of these specimens precludes definitive taxonomic assignment. Regardless, the discovery of selachian teeth unique from those previously described for the region broadens the known diversity of Late Cretaceous South American sharks. Additionally, the discovery of the teeth in fluvial sandstone may indicate a euryhaline paleobiology in the lamniform taxon or taxa represented by this tooth assemblage.

  7. [Cercospora kikuchii isolated from Province of Santa Fe (Argentina): genetic variability and cercosporin production].

    Science.gov (United States)

    González, Ana María; Turino, Ludmila; Latorre Rapela, María Gabriela; Lurá, María Cristina

    2008-12-31

    The aims of the present study were to analyze the genetic variability of Cercospora kikuchii isolates and the in vitro cercosporin production, of these isolates obtained from soybean at the central-northern region of Santa Fe province (Argentina). Also the relationship between RAPD profiles and toxin production was also assessed. The strain C. kikuchii NBRC 6711 and 13 soybean isolates with symptoms of leaf blight were tested. Cercosporin production was analyzed by growing the fungus on Potato Dextrose Agar, extracting the toxin in alkaline medium and determining its concentration by spectrophotometry. The population of C. kikuchii studied showed variability, both genotypically, nine different groups were encountered, and have the ability to produce cercosporin. No relationship was found between toxin production and the RAPD profiles.

  8. Pesticide exposure and health conditions of terrestrial pesticide applicators in Córdoba Province, Argentina

    Directory of Open Access Journals (Sweden)

    Mariana Butinof

    2015-03-01

    Full Text Available Agricultural workers represent a population that is highly vulnerable to the toxic effects of pesticide exposure. This cross sectional study aimed to describe the health conditions of terrestrial pesticide applicators in Córdoba Province, Argentina, their work practices and socio-demographic characteristics, by means of a standardized self-administered questionnaire (n = 880. A descriptive analysis reported a high prevalence of occasional or frequent symptoms: 47.4% had symptoms of irritation, 35.5% fatigue, 40.4% headache and 27.6% nervousness or depression. Using logistic regression models, risk and protective factors were found for symptoms of irritation, medical consultation and hospitalization. Among the occupational exposure variables, marital status, length of time in the job, low level of protection with regard to the use of personal protective equipment, combined use of different pesticides and the application of the insecticide endosulfan, were associated with a higher frequency of reported symptoms and higher consultation rates and hospitalization.

  9. [Bocavirus in infants under 5 years with acute respiratory infection. Chaco Province, Argentina, 2014].

    Science.gov (United States)

    Deluca, Gerardo D; Urquijo, María Cecilia; Passarella, Carolina; Picón, César; Picón, Dimas; Acosta, María; Rovira, Carina; Marín, Héctor M

    2016-01-01

    Acute respiratory infection (ARI) is the most frequent pathology along human life, being the most common cause of morbidity and mortality in children under 5 years. The aim of this study was to determine the frequency of bocavirus (BoV) in infants under 5 years with symptoms of ARI from north Argentina (Chaco province). The study was performed on nasopharyngeal aspirates from 488 patients, in the period of January-December 2014. The samples were tested by real time PCR and 36 positive BoV cases (7.4%) were detected. The period with the highest detection rate was June-September with 28 cases (77.8%), of which 26 (72.2%) were infants between 6-18 moths of life. In half of BoV positive cases this virus was detected as single infection of the upper respiratory tract, and in the remaining 50%, as concomitant infection with other microorganisms. To our knowledge, this would be the first study on molecular epidemiology of BoV in northern Argentina. We emphasize the importance of investigating these new viruses capable of generating acute respiratory disease and also to disseminate awareness on their circulation within the community.

  10. Argentina

    International Nuclear Information System (INIS)

    The history of Argentina nuclear development can be summarized into two periods: 'splendour' and 'stand-by'. The former starting in the decade of the 1950s until the late 1970s while the latter period goes from the late 1970s to 2006. The first period (1950-1980) was characterized by a national policy of scientific and technological development; State intervention in the area of industrial production. The military aspects, if any, were marginal in the context of the overall development. During this period, important public scientific technological projects were carried out: the production and sale of experimental reactors, nuclear plants (Atucha I and Embalse), and some projects aimed to developing national industry. The stimulus experienced in the country in this period accompanied the role of nuclear technology worldwide due to the Cold War and the persuasion factor among the main powers. However, during the 1970s and 1980s the whole world started questioning these technologies which ran parallel to the liberalization of the countries economies. The second period (1980s onwards) was characterized by many economic problems and the consequent transitory stop of national nuclear projects; e.g. Argentina transitory stopped its third nuclear plant (at present under construction). At that moment, neoliberal politics were aimed at reducing the role of the State and promoting privatization, separating nuclear projects from governmental control, trying to privatize the nuclear plants, and cutting scientific budgets. Argentina has two nuclear power plants in operation providing 8.6% of the total country's electricity. A third one, 692 MW(e) power reactor PHWR Atucha-2 construction was stopped in the 1990s and re-started in 2007 it is expected to be in commercial operation by 2011). Argentina nuclear power plants utility, NA S.A. is preparing the refurbishment of its CANDU-6 reactor. Argentina Atomic Energy Commission (CNEA) has a prototype of its CAREM nuclear power plant

  11. Urban Chagas disease in children and women in primary care centres in Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Guillermo Moscatelli

    2015-08-01

    Full Text Available The primary objective of this study was to estimate the prevalence of this disease in women of childbearing age and children treated at health centres in underserviced areas of the city of Buenos Aires. Demographic and Chagas disease status data were collected. Samples for Chagas disease serology were obtained on filter paper and the reactive results were confirmed with conventional samples. A total of 1,786 subjects were screened and 73 positive screening results were obtained: 17 were from children and 56 were from women. The Trypanosoma cruziinfection risk was greater in those individuals who had relatives with Chagas disease, who remember seeing kissing bugs, who were of Bolivian nationality or were born in the Argentine province of Santiago del Estero. The overall prevalence of Chagas disease was 4.08%. Due to migration, Chagas disease is currently predominantly urban. The observed prevalence requires health programme activities that are aimed at urban children and their mothers. Most children were infected congenitally, which reinforces the need for Chagas disease screening of all pregnant women and their babies in Argentina. The active search for new cases is important because the appropriate treatment in children has a high cure rate.

  12. [Health system and aboriginal communities in the province of Formosa, Argentina].

    Science.gov (United States)

    Mirassou, Cristina S

    2013-01-01

    The author comments her experience in the practice of medicine and public health among aborigines in Formosa, a long neglected province in northeast Argentina. Her experience goes through a span of 34 years, 11 in a small community in a far off region. The province has 530162 inhabitants, 43358 (6.5%) aborigines of the Wichí, Qom, and Pilagá ethnicities. Some particular public health problems of these aborigines are due to the great distance between communities and the regular medical assistance while others are related to cultural differences. The situation has gradually improved in the last 30 years due to government awareness in providing easy and close access to medical care, making the most of the abilities of local aborigines midwifes, teaching health assistants and conventional measures. The most apparent results are the decrease in infant mortality rates and the lower incidence of tuberculosis, with no deaths due to tuberculous meningitis since 1999. No less important was the opening of new opportunities for education and the teaching of both native and Spanish language in the schools retaining local customs. The changes have brought about new risks and challenges such as: traffic accidents involving youngsters riding motorcycles, alcoholism, obesity, diabetes (undiagnosed beforehand), high rate of adolescence pregnancy, and crisis of leadership within the communities. PMID:24152404

  13. Histopathology associated with angiostrongylosis in Akodon species (Rodentia: Sigmodontinae) from Sierra de la Ventana, Buenos Aires, Argentina.

    Science.gov (United States)

    Robles, María del Rosario; Perfumo, Carlos; Kinsella, John M; Navone, Graciela T

    2012-12-01

    Angiostrongylus is a metastrongylid nematode genus that includes species found in carnivores, rodents, and occasionally primates (including humans). About 100 species of wild sigmodontine rodents occur in Argentina, 16 of which are species of Akodon. The lungs of Akodon azarae and Akodon dolores from Sierra de la Ventana, Buenos Aires, Argentina, were examined, and 2 of 10 A. dolores specimens were positive for angiostrongylosis, showing macroscopic lesions of verminous pneumonia. Adults found were identified as Angiostrongylus morerai. Histopathology of the lungs revealed multiple nodules in the interstitium, alveoli, and vessels, resulting in interstitial fibrosis and the destruction of small capillaries and arterioles. Since extensive pathology in the lung was noted here from only 2 adults, it is probable that heavier infections may cause mortality in their hosts. This is the first record of this nematode species from A. dolores , expanding its geographic distribution to the southwest of Buenos Aires Province, and the first description of the histopathology of larval angiostrongylosis in a wild rodent from South America.

  14. Estabilidad, morfología y rugosidad de agregados de argiudoles típicos sometidos a distintos usos: su rol como indicadores de calidad física en suelos de la provincia de Buenos Aires, Argentina Stability, morphology and roughness of aggregates of typical argiudolls under diferent types of land uses: their role as indicators of soils physical quality in Buenos Aires province, Argentina

    Directory of Open Access Journals (Sweden)

    M Fernanda Alvarez

    2008-12-01

    Full Text Available En los últimos diez años se observó un importante cambio en el uso de la tierra en la llanura pampeana, lo cual ha llevado a una marcada degradación de los suelos. El objetivo del trabajo fue evaluar la estabilidad, la morfología y la rugosidad de distintos tamaños de agregados como indicadores de calidad en Argiudoles Típicos del sudeste bonaerense sometidos a distintos usos de suelo y a distintas intensidades de manejo. Se trabajó con el epipedón mólico de parcelas con distinto uso de suelo: cultivadas, forestadas y naturales. Los resultados mostraron mayor estabilidad en los suelos no laboreados y en los forestados de más de treinta años. En los sitios cultivados y forestados se observaron agregados alargados, cuadrangulares y esféricos, mientras que en los sitios sin laboreo no se presentaron las formas esféricas. La rugosidad de los agregados fue mayor en los suelos sin laboreo, si bien ello varió con el tamaño de los agregados. La estabilidad, morfología y rugosidad de agregados demostraron ser buenos indicadores de calidad de suelos del SE bonaerense.During the last ten years, an important land use change took place in the Pampas region of Argentina. This change led to a significant soil degradation. This work aims to evaluate the stability, morphology and roughness of soil aggregates in soils under different land uses. The values found for each land use could serve as soil quality indicators in southeastern Buenos Aires. Samples were taken from mollic epipedons under cultivated, forest and natural soils. Results showed higher aggregate stability in virgin and forest soils than in cultivated soils. Aggregates were elongated, quadrangular and spherical in cultivated and forest soils. Aggregates from non-cultivated soils did not show the expected spherical forms; they also presented a high roughness although it varied across the different aggregate sizes. Soil aggregate stability, morphology and roughness were suitable

  15. Diatomeas (Bacillariophyceae de humedales de altura de la Provincia de Jujuy-Argentina Diatoms (Bacillariophyceae from high altitude wetlands of Jujuy province-Argentina

    Directory of Open Access Journals (Sweden)

    Claudia Seeligmann

    2008-07-01

    Full Text Available Se estudió la flora diatomológica perteneciente a 13 humedales de altura ubicados entre los 3500-4683 m s. n. m. de la Provincia de Jujuy (Argentina. Se identificaron, excluyendo las especies de Navicula sensu stricto, 51 géneros y 157 taxones infragenéricos, de los cuales tres son nuevas citas para Argentina y 43 se registran por primera vez para Jujuy. Se propone una nueva combinación: Craticula cuspidata var. gracilis. Muy interesante resultó el hallazgo de Cylindrotheca gracilis (Bréb. Grunow, nunca antes mencionado para este tipo de ambientes. Sólo Amphora veneta Kützing estuvo presente en más del 90 % de los cuerpos de agua estudiados mientras que Nitzschia hungarica Grunow, Craticula cuspidata (Kützing D. G. Mann var. cuspidata y Luticola cohnii (Hilse Lange-Bertalot fueron halladas en más del 60% de las muestras.A diatomological analysis of thirteen high altitude wetlands, between 3500-4683 m a. s. l. of Jujuy Province (Argentina was performed. Fifty one genera and one hundred and fifty seven infrageneric taxa, excluding Navicula sensu stricto species, were identified; three of them are new records for Argentina and 43 are new for Jujuy Province. A new combination is proposed: Craticula cuspidata var. gracilis. The finding of Cylindrotheca gracilis (Bréb. Grunow is important, since it has not been previously mentioned for this kind of environments. Amphora veneta Kützing var. veneta was recorded in more than 90 % of the studied waterbodies while Nitzschia hungarica Grunow, Craticula cuspidata (Kützing D. G. Mann var cuspidata and Luticola cohnii (Hilse Lange-Bertalot were found in more than 60% of the samples.

  16. provincia de Buenos Aires (República Argentina

    Directory of Open Access Journals (Sweden)

    Rubén Alberto Cervini

    2008-01-01

    Full Text Available En el estudio que se informa se investigaron las relaciones entre progreso de aprendizaje (valor agregado, motivación y autoconcepto académico del alumno en Matemática, en el marco de los efectos de las características socioeconómicas y académicas del alumno y de su escuela. Para la medición del valor agregado se utilizaron los resultados de dos pruebas estandarizadas de Matemática aplicadas a una cohorte de alumnos de la Provincia de Buenos Aires (República Argentina en dos momentos diferentes (séptimo y noveno años de Educación General Bási ca - EGB. Las mediciones de motivación y de autoconcepto se basaron en respuestas a ítemes binarios de actitudes con respecto a Ma temática y fueron definidas utilizando el análisis de la componente prin - cipal, a partir de la matriz de correlación tetracórica (método heurístico. Para el análisis de las correlaciones se utilizó la téc nica estadística de modelos multinivel. El presente estudio relaciona los resultados empíricos con la teoría del habitus de Bourdieu. Inicialmente, el autoconcepto resulta significativa y positivamente asociado con el puntaje en la prueba y con el progreso de aprendizaje posterior. Este efecto continúa siendo significati vo aun cuando se controlan los efectos del nivel socioeconómi - co y del género del alumno. Sin embargo, su capacidad ex plicativa es muy tenue desde el punto de vista práctico. Si bien este resultado confirmaría la hipótesis central de la teoría de la reproducción, indica un sendero a través del cual podrían producirse transformaciones. Uno de los desafíos del sistema educativo es promover el habitus escolar cultivado (autoconcepto más allá de las determinaciones sociales, culturales y económicas.

  17. Hydatidosis cases in one of Mar del Plata City hospitals, Buenos Aires, Argentina Casos de hidatidose em um hospital da cidade de Mar del Plata, Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Marcela Cecilia Dopchiz

    2007-12-01

    Full Text Available Hydatidosis is a zoonosis of worldwide distribution produced mainly by the metacestode Echinococcus granulosus. In Argentina, its distribution reaches endemic levels. The aims of this investigation were to contribute to the knowledge of hydatidosis in the southeast of Buenos Aires province, study its evolution at the Interzonal General Hospital for Acute Diseases between 1992 and 2002 and discuss its importance. Clinical records of operated and/or diagnosed patients were reviewed with regard to this disease. One hundred and twenty cases were analyzed. Among the patients, 56.7% were women. The average age was 42.2+16.8 years. 68.3% lived in urban areas. In 75% of the cases, ultrasonography was used. Hepatic location was most frequently seen. 89.2% received surgical treatment. Albendazole was used for 19 patients. The mean length of hospital stay was 16 days. We conclude that this zoonosis is a disease that generates high costs in medical care and for this reason more epidemiological studies should be carried out and public health authorities should implement control and prevention strategies in the region.A hidatidose é uma zoonose de distribuição mundial produzida principalmente pela meta-cestódeo Echinococcus granulosus. Na Argentina, a distribuição alcança níveis endêmicos. O objetivo desta pesquisa foi contribuir ao conhecimento da hidatidose no sudeste da província de Buenos Aires, estudar sua evolução no Hospital Geral Interzonal para Doenças Infecciosas Agudas, entre 1992 e 2002 e discutir sua importância. Os registros clínicos dos pacientes operados e/ou diagnosticados foram revisados quanto a esta doença. Cento e vinte casos foram analisados. Entre os pacientes, 56,7% eram mulheres. A idade média foi de 42,2+16,8 anos. Um grupo de 68,3% eram residentes urbanos. Em 75% dos casos, foi utilizada a ultrassonografia. Observou-se mais freqüentemente a localização hepática. Um grupo de 89,2% foi submetido a tratamento cir

  18. Argentina

    Energy Technology Data Exchange (ETDEWEB)

    1999-09-01

    This report presents a brief overview of the socio-economic, energy and environmental context in which climate change mitigation actions in Argentina shall be inserted. To that end, the dynamic of the Argentine economic development, its influence on the energy system and environmental impacts is summarised. From the environmental standpoint, emphasis shall only be made on the impact of economic development patterns and energy policies on GHG emission. (au) 73 refs.

  19. Air pollution biomonitoring in Argentina, application of neutron activation analysis to the study of biomonitors

    International Nuclear Information System (INIS)

    The assessment of baseline levels of atmospheric pollutants and the identification of polluted areas is a complex problem, as pollutant contents at a certain geographical location is usually a combination of contributions from various diverse sources, including long-range transport. Elemental chemical characterization of atmospheric pollutants is thus of great importance and Neutron Activation Analysis has proved to be a powerful technique for multielemental determination of trace elements in biomonitors and aerosols. The general objective of this project is to study the use of biomonitors, specially lichens, for evaluating pollutant levels over a wide geographic area of Argentina and for establishing baseline values and assessing time trends. Two lichen species (Usnea sp. and Ramalina ecklonii (Spreng.) Mey. and Flot) have been identified as suitable monitors of air pollution, with potential regional application at the central area of the country (province of Cordoba) and pilot studies have been initiated to test the practicability of sampling and sample collection. An area of approximately 40,000 km2 will be covered by a sampling network, using in situ growing lichens. The distribution maps for the two selected species are already drawn and sampling of local soils will also be conducted. Current efforts at the Neutron Activation Analysis laboratory are put on assessing, for the selected lichen species, the influence of sample preparation methods on trace element concentrations. The use of other analytical techniques will allow the evaluation of the bioindicator chemical response and its relationship to different atmospheric quality levels. Source identification and apportionment will be done by statistical fingerprinting of the elemental concentrations, as sources of pollution are characterized by being composed of different mixtures of elements in different proportions. In this way and as a long-term objective, regional maps will be drawn showing the

  20. [Spider diversity in cultures of Citrus sinensis (Rutaceae) in Corrientes province, Argentina].

    Science.gov (United States)

    Avalos, Gilberto; Bar, Maria Esther; Oscherov, Elena Beatriz; González, Alda

    2013-09-01

    Spiders are predators that reduce insect pest populations in agroecosystems. In spite that the presence of spider assemblages has been described in different crop plants, no reports have been done for Citrus species in Argentina. We studied the spider community associated with cultures of Citrus sinensis in the province of Corrientes, Argentina, in two plots (AM1 irrigated and AM2 unirrigated) of 0.82 hectares each. Spiders were collected monthly by using pitfall traps, hand capture, agitation of foliage and sieving of soil litter. A total of 7174 specimens were collected (33 families, 44 genera and 200 species/morphospecies). The AM1 recorded 3811 individuals (33 families, 179 species/morphospecies) and AM2 3363 individuals (31 families, 174 species/morphospecies). November, December and January showed the highest abundance in both plots. A total of 70% of collected spiders were juveniles. Eight families were the most abundant and represented 75% of spiders collected in both plots, the largest being Lycosidae. We identified eight guilds in both plots, for which the ground runners resulted the most abundant (AM1 n = 1341, s=39, n=999 AM2, s = 33), followed by orb weavers (AM1 n = 637, s = 36; AM2 n = 552, s = 33), the stalkers (AM1 n = 471, s = 43, AM2 n = 453, s = 47) and the space web-builders (AM1 n = 446, s = 23; AM2 n = 342, s = 25). The analysis of alpha diversity in both plots (AM1H' = 4.161, J' = 0.802; AM2 H' = 4.184, J' = 0.811) showed no significant differences (t = 1.083 p = 0.279). The linear dependences model was the one with the best fit results, where the species observed were more than estimated. Clench model estimated 90.9% of the spiders observed in the unit with irrigation and 90.6% in the unit without irrigation. PMID:24027921

  1. Comments on Environmental and Sanitary Aspects of the Scorpionism by Tityus trivittatus in Buenos Aires City, Argentina

    Directory of Open Access Journals (Sweden)

    Adolfo Rafael de Roodt

    2014-04-01

    Full Text Available Deaths by venomous animals are medical emergencies that can lead to death and thus constitute sanitary problems in some regions of the world. In the South of America, the accidents by these animals are a common sanitary problem especially in warm, tropical or subtropical regions, related with rural work in several countries. Argentina is located in the extreme South of South America and a minor part of the continental surface is in tropical or subtropical regions, where most of the accidents by venomous animals happen. However, in the big cities in the center and South of the country, with no relation to rural work, scorpionism, mostly due to the synanthropic and facultative parthenogenetic scorpion Tityus trivittatus, has become a sanitary problem in the last few decades. This scorpion is present in the biggest cities of Argentina and in the last decades has killed over 20 children in provinces of the center and north of the country, mostly in big cities. In addition, it seems that this species is growing and spreading in new regions of the cities. In this revision, some characteristics of this scorpion regarding its habitat, spreading in Buenos Aires city, combat measures and available treatments are discussed.

  2. An Environmental Management Model of Thermal Waters in Entre Ríos Province, Argentina

    Science.gov (United States)

    Pablo, Mársico Daniel; Luís, Díaz Eduardo; Ivana, Zecca; Oscar, Dallacosta; Antonio, Paz-González

    2015-04-01

    Deep exploratory drillings, i.e. those with more than 500 meters depth, have been performed in the Entre Ríos province, Argentina, in order to ascertain the presence of thermal water. Drilling began in 1994, and until now there have been 18 polls with very variable results in terms of mineralization, resource flow, and temperature. The aim of this study was to present a management model, which should allow operators of thermal complexes to further develop procedures for safeguarding the biodiversity of the ecosystems involved, both during exploration and exploitation activities. The environmental management Plan proposed is constituted by a set of technical procedures that are formulated and should be performed during the stages of exploration and exploitation of the resource, and consists of: environmental monitoring, environmental audit, public information and contingency programs. This Plan describes the measures and proposals aimed at protecting environmental quality in the area of influence of a thermal complex project, ensuring that its execution remains environmentally responsibly, and allowing implementation of specific actions to prevent or correct environmental impacts, as predicted in the evaluation of the Environmental Program. The audit of environmental impact includes and takes into account natural factors, such as water, soil, atmosphere, flora and fauna, and also cultural factors. The technical audit Plan was prepared in order to get a systematic structure and organization of the verification process, and also with regard to document the degree of implementation of the proposed mitigation measures. Finally, an environmental contingency program was implemented, and its objective was to consider the safeguarding of life and its natural environment. Thus, a guide has been developed with the main actions to be taken on a contingency, since forecast increases the efficiency of the response. The methodology developed here was adopted as the procedure

  3. Second Line of Defense, Port of Buenos Aires and Exolgan Container Terminal Operational Testing and Evaluation Plan, Buenos Aires, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Roberts, Bryan W.

    2012-08-23

    The Office of the Second Line of Defense (SLD) Megaports project team for Argentina will conduct operational testing and evaluation (OT&E) at Exolgan Container Terminal at the Port of Dock Sud from July 16-20, 2012; and at the Port of Buenos Aires from September 3-7, 2012. SLD is installing radiation detection equipment to screen export, import, and transshipment containers at these locations. The purpose of OT&E is to validate and baseline an operable system that meets the SLD mission and to ensure the system continues to perform as expected in an operational environment with Argentina Customs effectively adjudicating alarms.

  4. Reflexiones acerca de la significación cultural de un malón indígena (Mercedes, provincia de Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Laura Aylén Enrique

    2012-06-01

    Full Text Available The emergence of the city of Mercedes (Buenos Aires province, Argentina is closely linked to the history of, not always harmonious, border interethnic relations dating from the colonial period. We analyze some strategies in the use of the past as well as the dynamic character present in the construction of cultural resources of the area after the recent addition to the historical monument "Cruz de Palo" of a plaque commemorating indigenous victims of a fight that occurred in early nineteenth century.

  5. Paleomagnetism of Upper Triassic rocks in the Los Colorados hill section, Mendoza province, Argentina

    Science.gov (United States)

    Vizán, Haroldo; Ixer, Robert; Turner, Peter; Cortés, José María; Cladera, Gerardo

    2004-12-01

    Different authors have highlighted a systematic disagreement between Late Carboniferous-Triassic paleomagnetic poles (PPs) for Gondwanaland and Laurasia when they are repositioned in a classical reconstruction prior to the breakup of Pangea A. This disagreement has been interpreted in geodynamic terms or as an evidence of non-dipole components of the geomagnetic field. Such analyses have been made using data on South American PPs published approximately 25 years ago and obtained using outdated methodologies. In this article, the authors present new Late Triassic paleomagnetic data from rocks that crop out in the Pre-Andean ranges (Precordillera) of Mendoza province (Argentina). Samples of different lithologies were taken from two limbs of a doubly plunging syncline, and several field tests of paleomagnetic stability were applied. The results indicate primary site mean directions that yield a PP with geographic coordinates and statistical parameters as follows: Lat.=76°S, Lon.=280°E, N=12, R=11.63, α95=8°, K=30.2. This PP agrees with mean PPs of Laurasia of similar ages in different models of Pangea A, indicating that the hypothesis of a dipolar paleomagnetic field could be valid for the Late Triassic.

  6. Potential schistosome-vector snails and associated trematodes in ricefields of Corrients province, Argentina: preliminary results

    Directory of Open Access Journals (Sweden)

    Alejandra Rumi

    1990-09-01

    Full Text Available Considering the possibility of introduction of schistosomiasis mansoni into Argentina as a consequence of dam construction on the Rio De La Plata basin, preliminary studies have been carried out on agrosystems such as ricefields in Corrientes province with the following purposes: 1 to survey and estimate the relative abundance of planorbids and identify potential vector species; 2 to identify environmental factors capable of influencing Biomphalaria population dynamics; and 3 to find out snail-parasite associations and estimate snail infection rates in order to detect possible competitive interactions between larval stages of native trematodes that could be used in biological control of Schistosoma mansoni. Three potential schistosome vectors were detected in ricefields, namely Biomphalaria straminea, B. tenagophila and B. peregrina, although B. orbignyi, a species refractory to infection with S. mansoni, proved the most frequent and abundant. Positive correlations (P0.05 was found in total iron, phosphates (SRP, pH and soil granulometry. Echinocercariae developed from rediae and belonging to Petasiger sp., Paryphostomum sp., and other undetermined species were found.

  7. Dinámica fluvial, paleoambientes y ocupaciones humanas en la localidad arqueológica Paso Otero, río Quequén Grande, Provincia de Buenos Aires Fluvial dynamics, palaeoenvironment and human occupations in the Paso Otero archaeological locality, Quequén Grande river (Buenos Aires Province, Argentina

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    Cristian M. Favier Dubois

    2006-12-01

    Full Text Available En la localidad arqueológica Paso Otero, cuenca media del río Quequén Grande, se han desarrollado estudios geoarqueológicos que permitieron realizar un esquema de la evolución ambiental del sector desde el Pleistoceno tardío, teniendo en cuenta el potencial de cada unidad geológica para el registro de actividades humanas, y los procesos de formación involucrados. En este marco pudo evaluarse la situación estratigráfica y paleoambiental de las "pilas óseas" recuperadas en el sitio Paso Otero 1, vinculando su ocurrencia con la presencia de discordancias erosivas ocasionadas por flujos turbulentos. Se postula asimismo que la escasez de registro arqueológico en el Holoceno medio en este valle (y otros del área pampeana se relaciona con el desarrollo de ambientes muy poco propicios para la ocupación humana, como son los bañados y lagunas someras que caracterizan al Miembro Río Salado de la Formación Luján, unidades que por otra parte resultan las mejores representadas entre las correspondientes a ese intervalo en los valles pampeanos.Geoarchaeological research at Paso Otero locality, middle basin of the Quequén Grande River (Buenos Aires Province, was carried out to schematize the environmental evolution of this valley since the late Pleistocene. The potential human use of each geological unit was established, along with the formation processes of the archaeological record. From within this framework the stratigraphic and environmental context of four guanaco bone concentrations (piles recovered from Paso Otero 1 site were analyzed. The occurrence of the piles was related to two major erosive discordances produced by turbulent floods. As such, this paper postulates a strong relationship between the lack of mid-Holocene archaeological remains in this valley (and other valleys of the Pampean region and the presence of lacustrine and paludal environments that inhibited human occupation of these areas during that period, such as the

  8. Argentina

    Directory of Open Access Journals (Sweden)

    Hernan Galperin

    2004-01-01

    Full Text Available En este trabajo se analizan las bases sobre las que se está desarrollando el proceso de transición hacia la TV digital en Brasil y Argentina, y se discuten las posibilidades que la transición presenta para replantear la estructura de mercado y el modelo de regulación de la TV abierta en los países del Mercosur. La principal hipótesis es que la TV digital abre una oportunidad única para reformar el actual modelo de radiodifusión basado en la concesión de un número reducido de licencias a operadores de tipo generalista. Al multiplicar la capacidad de transmisión y facilitar el desarrollo de servicios interactivos tanto de entretenimiento como educativos y de información, la transición a la TV digital se ofrece como instrumento de política pública para alcanzar objetivos clave en materia de comunicación, como el pluralismo, la apertura del mercado y el achicamiento de la llamada brecha digital.

  9. Argentina

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    G. Benedetti

    2007-01-01

    Full Text Available El presente trabajo tiene como objetivo realizar un diagnóstico ambiental de un sector de la ciudad de Bahía Blanca, Argentina basado en el arbolado urbano de alineación. El arbolado constituye un componente fundamental de los paisajes artifi ciales ya que contribuye al aumento del confort y al mejoramiento de la calidad del medio. En este sentido, actúa como un factor moderador de las condiciones climáticas, la contaminación y la salud de la población. El municipio de la ciudad de Bahía Blanca tiene como proyecto la realización de inventarios del arbolado en los distintos barrios, para lograr optimizar la relación entre la cantidad de ejemplares arbóreos y la densidad poblacional. Es importante considerar la variedad de ejemplares en función del uso del suelo y de las características ambientales de cada sector. Por lo tanto, este trabajo presenta un diseño metodológico para la elaboración del plano verde de la ciudad.

  10. Prevalence of enteroparasites in a residence for children in the Córdoba Province, Argentina.

    Science.gov (United States)

    Guignard, S; Arienti, H; Freyre, L; Lujan, H; Rubinstein, H

    2000-03-01

    A study of the prevalence of enteroparasites in a population belonging to a substitute home that gives shelter to orphaned and homeless children was done using conventional methods of analysis. This home is located in Córdoba Province, Argentina, and has the following characteristics: It has nine houses located inside the main plot of ground, that shelter 139 individuals, and 25 houses outside this plot distributed randomly in Unquillo city and that shelter 257 individuals. The overall parasitic infection, pathogen and commensal organisms included, yielded 84.8% and the prevalence of the most important parasites was: Enterobius vermicularis (43.4%), Giardia lamblia (23.0%), Ascaris lumbricoides (13.1%), Entamoeba coli (45.5%), Blastocystis hominis (44.4%) and Endolimax nana (34.6%). We also analyzed the population dividing it according to the residence place (inside or outside the plot), age and sex of the individuals. In reference to the location of the patients, A. lumbricoides and E. coli showed significant prevalence in the individuals living inside the plot (p < 0.001 and p < 0.005, respectively) and of B. hominis in those living outside the main plot (p < 0.005). Results indicated a greater parasitism level in the outside residents (61.5%, p < 0.001). When the individuals were studied according to sex, no significant difference was observed, except for E. vermicularis that showed greater prevalence in the male sex (p < 0.04). When the individuals were grouped according to age ranges, a greater prevalence in individuals from 5 to 14 years was noticed (p < 0.01). In this study is also included an analysis of the multiparasitism level that comprises the whole population. PMID:10870946

  11. Biodiversity of trematodes associated with amphibians from a variety of habitats in Corrientes Province, Argentina.

    Science.gov (United States)

    Hamann, M I; Kehr, A I; González, C E

    2013-09-01

    The main goals of this study were to compare the richness of parasitic trematodes in amphibians with diverse habits (terrestrial, fossorial, semi-aquatic and arboreal), and to evaluate whether the composition of the trematode community is determined by ecological relationships. Specimens were collected between April 2001 and December 2006 from a common area (30 ha) in Corrientes Province, Argentina. Trematodes of amphibians in this area comprised a total of 19 species, and were dominated by common species. Larval trematodes presented highest species richness, with the metacercaria of Bursotrema tetracotyloides being dominant in the majority (7/9, 78%) of the parasite communities. Adults of the trematode Catadiscus inopinatus were dominant in the majority (6/9, 67%) of amphibians. The amphibians Leptodactylus latinasus, Leptodactylus bufonius and Scinax nasicus presented a high diversity of trematodes, whereas Leptodactylus chaquensis had the lowest diversity even though it presented with the highest species richness. The patterns of similarity among amphibian species showed groups linking with their habitats. Leptodactilid amphibians, with a generalist diet and an active foraging strategy showed highest infection rates with adult trematodes. The mean richness of trematode species related to host's habitat preferences was higher in semi-aquatic amphibians. Results suggest that semi-aquatic amphibians, present in both aquatic and terrestrial environments, present a greater diversity of parasites as they have a higher rate of exposure to a wider range of prey species and, hence, to diverse infective states. The trematode composition is related to the diets and mobility of the host, and habitat.

  12. Surnames, geographic altitude, and digital dermatoglyphics in a male population from the province of Jujuy (Argentina).

    Science.gov (United States)

    Dipierri, José E; Gutiérrez-Redomero, Esperanza; Alonso-Rodríguez, Concepción; Alfaro, Emma; Demarchi, Dario; Rivaldería, Noemí

    2014-06-01

    The possible association between finger dermatoglyphic patterns and altitude and surname distribution was analyzed in a sample of adult males from the province of Jujuy, Argentina. We also investigated the biological affinity of this population with other South American natives and admixed populations. Fingerprints were obtained from 996 healthy men, aged 18-20 years, from the highlands (HL: 2500m, Puna and Quebrada) and lowlands (LL: Valle and Selvas). Surnames were classified into native/autochthonous (A) or foreign (F), resulting in three surname classes: FF, when both paternal and maternal surnames were of foreign origin; FA, when one surname was foreign and the other was native; and AA, when both surnames were native. Frequencies of finger dermatoglyphic patterns - arches (A), radial loops (RL), ulnar loops (UL), and whorls (W) - were determined for each digit in relation to geographic location, altitude, and surname origin, resulting in the following categories: HL-FF, HL-FA, HL-AA, LL-FF, LL-FA, and LL-AA. The statistical analyses showed that UL and RL were more common in individuals of HL origin, whereas W and A were more frequent in the LL males (pdermatoglyphic patterns and surname origin when geographic altitude was considered. In the HL group, UL was associated with AA and FA; in the LL group, the presence of A was associated with FF and FA. The distribution of dermatoglyphic patterns shows that the population of Jujuy belongs to the Andean gene pool and that it has undergone differential levels of admixture related to altitude.

  13. Environmental risk assessment of arsenic and fluoride in the Chaco Province, Argentina: research advances.

    Science.gov (United States)

    Buchhamer, Edgar E; Blanes, Patricia S; Osicka, Rosa M; Giménez, M Cecilia

    2012-01-01

    The arsenic (As) and fluoride (F⁻) concentration in groundwater and potential adverse human health risk was investigated in the Central-West Region of the Chaco Province, northern Argentina. The mean concentration of As in shallow groundwater was 95 μg/L, where 76% of samples exceeded the World Health Organization (WHO) guideline value of 10 μg/L, while in deep groundwater it was 90 μg/L, where 63% samples exceeded 10 μg/L. For As health risk assessment, the average daily dose, hazard quotient (HQ), and cancer risk were calculated. The values of HQ were found to be >1 in 77% of samples. This level of contamination is considered to constitute a high chronic risk compared with U.S. Environmental Protection Agency (EPA) guidelines. Further, a significant portion of the population has lifetime carcinogenic risk >10⁻⁴ and may suffer from cancer. A positive correlation was observed between As and F⁻ in groundwater. The Código Alimentario Argentino (CAA) suggested a limit of F⁻ in drinking water as low as 0.8 mg/L under tropical environmental conditions; however, in shallow (39%) and deep groundwater (32%), samples exceeded these values. Exposure to F⁻ was calculated and compared with the adequate intake of minimal safe level exposure dose of 0.05 mg/kg/d and it was noted that 42% of population may be at high risk of fluorosis. Chronic exposure to high As and F⁻ levels in this population represents a concern due to possible adverse health effects attributed to these elements.

  14. Primer registro de Tityus trivittatus (Scorpiones: Buthidae en la provincia de Mendoza (Argentina First record of Tityus trivittatus (Scorpiones: Buthidae in Mendoza province (Argentina

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    Florencia Fernández Campón

    2009-06-01

    Full Text Available En la siguiente nota se informa sobre el primer registro del escorpión Tityus trivittatus Kraepelin en la provincia de Mendoza en el Barrio Campo Papa, departamento de Godoy Cruz. T trivittatus es dentro de nuestro país una de las especies de escorpiones con importancia médica, debido a que su veneno neurotóxico puede causar lesiones en el sistema nervioso y en algunos casos la muerte, particularmente en niños.This note reports the first record on the scorpion Tityus trivittatus Kraepelin in Mendoza province in the locality of Campo Papa, Godoy Cruz. T. trivittatus is one of the species of scorpion of medical importance in Argentina, due to the fact that its neurotoxic venom can damage the nervous system and may even be fatal in some cases, especially among children.

  15. Leaf anatomy of medicinal shrubs and trees from Misiones forest of the Paranaense Province (Argentina): Part 2 Anatomía foliar de arbustos y árboles medicinales de la Selva Misionera de la provincia Paranaense (Argentina): Parte 2

    OpenAIRE

    Ana M Arambarri; Freire, Susana E.; Colares, Marta N.; Néstor D. Bayón; Novoa, María C.; Claudia Monti; Sebastián A. Stenglein

    2008-01-01

    The present paper contains the study of the second part of medicinal shrubs and trees from Paranaense province. Forty five species of shrubs and trees belonging to 29 families inhabiting Misiones forest of the Paranaense biogeographic province (Argentina) have been cited with medicinal properties. The work provides illustrations of diagnostic characters and conclusions of the main botanical differential traits, such as the presence of crystaliferous epidermis (e.g. Trixis divaricata subsp. di...

  16. Ecotoxicological and Genotoxic Evaluation of Buenos Aires City (Argentina) Hospital Wastewater

    OpenAIRE

    Anahí Magdaleno; Ángela Beatriz Juárez; Valeria Dragani; Magalí Elizabeth Saenz; Marta Paz; Juan Moretton

    2014-01-01

    Hospital wastewater (HWW) constitutes a potential risk to the ecosystems and human health due to the presence of toxic and genotoxic chemical compounds. In the present work we investigated toxicity and genotoxicity of wastewaters from the public hospital of Buenos Aires (Argentina). The effluent from the sewage treatment plant (STP) serving around 10 million inhabitants was also evaluated. The study was carried out between April and September 2012. Toxicity and genotoxicity assessment was per...

  17. Nuevos registros de Hippidion (Mammalia, Perissodactyla en el Pleistoceno tardío de la provincia de Buenos Aires, Argentina

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    Prado, José Luis

    2013-12-01

    Full Text Available This study describes two new skulls referred to Hippidion principale (Lund and vaRíous elements of the appendicular skeleton referred to H. devillei from two classic localities from Buenos Aires province: the Salado and Quequén Grande Rivers. For taxonomic identification of the appendicular remains was performed a multivariate analysis that included the metacarpals and phalanges described and several remains recorded in various locations in Argentina and Brazil. For the determination of the skulls was made a comparative study with other skulls from different localities. These data increasing the record of Hippidion in South America and provide new evidence about the chronological distribution of two species of Hippidion. One radiometric data was obtained by the method of AMS dating to the skull from Salado River (MHM-P54 about a 14C age 14120 ± 50 BP. In general, bearing sediments at both localities are referable to the Lujanian Age and the Biozone of Equus (Amerhippus neogeus.En este estudio se describen dos nuevos cráneos referidos a Hippidion principale (Lund y varios elementos del esqueleto apendicular referidos a H. devillei procedentes de dos localidades clásicas de la provincia de Buenos Aires, las márgenes de los ríos Salado y Quequén Grande. Para la identificación taxonómica de los restos apendiculares, se realizó un análisis multivariante en el que se incluyeron los metacarpianos y falanges descritos y los registrados en varias localidades de Argentina y Brasil. Para la determinación de los cráneos se realizó un estudio comparativo con otros cráneos de diversas localidades. Estos hallazgos incrementan el registro de Hippidion en América del Sur y aportan nuevas evidencias sobre la cronología de sus especies en Argentina. Se realizó una datación por AMS para el ejemplar de Río Salado (MHM-P54 que ha suministrado una edad 14C 14120 ± 50 BP. En general, los sedimentos portadores en ambas localidades son referibles a

  18. Segunda encuesta antropometrica de embarazadas de la ciudad de Buenos Aires, Argentina 2010 The second anthropometric survey of pregnant women in the city of Buenos Aires, Argentina 2010

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    Andrés Bolzán

    2011-12-01

    Full Text Available OBJETIVOS: mostrar los resultados de la segunda encuesta antropométrica en embarazadas en Buenos Aires, Argentina. MÉTODOS: fueron medidas todas las embarazadas que concurrieron a control de salud durante una semana en los consultorios externos y centros de salud de las 12 maternidades públicas valorándose su peso, talla e índice de masa corporal (IMC. Se empleo una encuesta estructurada. RESULTADOS: fueron evaluadas 2811 embarazadas, nacidas en Argentina (49% y en otros países (51%. Dentro de este segundo grupo, un 49% correspondió a mujeres nacidas en Bolivia (22%, Paraguay (19% y Perú (8%. El problema nutricional más importante lo constituyó el exceso de peso con diferencias estadísticamente significativas según país de nacimiento. Se observaron dos curvas claramente diferenciadas en el IMC de embarazadas adolescentes y adultas. CONCLUSIONES: la investigación permitió obtener el perfil de estado nutricional durante la gestación empleando curvas nacionales de incremento del IMC ajustado por edad gestacional y observar el efecto de algunos determinantes sociales.OBJECTIVES: to present the results of the second anthropometric survey ofpregnant women in Buenos Aires, Argentina. METHODS: measurements were taken of all pregnant women attending the outpatient services of 12 public maternity hospitals during one week. Measurements included weight, height and body mass index (BMI. The survey was a structured survey. RESULTS: the study covered 2811 pregnant women born in Argentina (49% and other countries (51%. Of the latter, 49% were women born in Bolivia (22%, Paraguay (19% and Peru (8%. The main nutritional problem was overweight and there were statistically significant differences according to country of birth. The BMI curves for pregnant adults and pregnant adolescents exhibited clear differences. CONCLUSIONS: the survey provided a profile of the nutritional status of pregnant women, using national BMI growth curves adjusted for

  19. Municipal waste management and groundwater contamination processes in Córdoba Province, Argentina

    OpenAIRE

    Daniel Emilio Martínez; María Laura Gomez

    2010-01-01

    In Coronel Moldes, Argentina, waste management practices consist in municipal waste being tipped directly onto an area of sand dunes at the municipal waste disposal site (MWDS). Moreover, untreated liquid waste from septic tanks and latrines from urban areas are discharged in the same place. This co-disposal waste management is very common in many regions of Argentina and its impact on the groundwater of Coronel Moldes has not been evaluated. The study area is located in the vicinity of a MWD...

  20. Geochemistry of the hydrothermal systems in the Jujuy Province, Argentina, and relationship with the regional geology

    Science.gov (United States)

    Peralta Arnold, Yesica; Cabassi, Jacopo; Tassi, Franco; Caffe, Pablo; Vaselli, Orlando

    2016-04-01

    The western sector of the Jujuy province (22°-24° S), Argentina, basically consisting of the Puna region (from 3,500 to 4,700 m a.s.l.) that borders the Central Volcanic Zone (CVZ), is characterized by sub-meridional ridges that alternate with elongated basins and by extremely voluminous intermediate and silicic ignimbrite deposits, the latter being related to late miocenic and pliocenic calderas and central volcanic edifices. In this region, several hydrothermal discharges with outlet temperatures up to 62°C occur. Among them, the Coranzulí and Pairique thermal emissions show a spatial relationship with miocenic volcanic complexes, whereas other thermal manifestations (Queñual, Orosmayo, Pirquitas, Arizutar, Cono Panizo and Rachaite) are clearly controlled by the local structural setting. Most of these thermal waters have relatively high total dissolved solids (TDS up to 46,500 mg/L), an alkaline-chloride composition and significant concentrations of B, NH4 and SiO2, i.e. they show the typical geochemical features of geothermal brine. Exceptions are the Coranzulí, Orosmayo and Rachaite springs, mainly fed by a shallow Na(Ca)-bicarbonate aquifer. The eastern sector of the province consists of the Eastern Cordillera, composed of a proterozoic basement constituted by the sedimentary sequences of the Puncoviscana Fm, and the Subandean Range, which shows wide east-vergence anticlines whose detachment levels are Silurian-Devonian shales. Both regions are separated by a major thrust that rises the Proterozoic and Eopaleozoic sequences over the Subandean System. The thermal waters in the Eastern Cordillera, namely Termas de Reyes, are characterized by alkaline-sulfate composition, temperature of ≈50°C and neutral pH. In contrast, in the Subandean Ranges, which is separated from the Eastern Cordillera by a thrust rising Proterozoic and Eopaleozoic sequences over the Subandean System, the Aguas Calientes springs are characterized by low temperature (from 21°C to

  1. Coleópteros acuáticos de lagunas situadas en el noroeste de la provincia de Corrientes, Argentina Aquatic Coleoptera from ponds in the northwest of Corrientes Province, Argentina

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    María C. Gomez Lutz

    2012-06-01

    Full Text Available El objetivo de este estudio es contribuir al conocimiento de la biodiversidad de coleópteros acuáticos del NE argentino. Los sitios de muestreo corresponden a dos lagunas permanentes ubicadas en el departamento Capital de la provincia de Corrientes, Argentina. Los muestreos fueron realizados desde octubre de 2010 a marzo de 2011. En total, 107 especies de coleópteros, incluidas en 40 géneros y ocho familias fueron registradas: Haliplidae, Dytiscidae, Noteridae, Dryopidae, Hydrochidae, Hydrophilidae, Limnichidae y Scirtidae. La especie Berosus hamatus Knisch es un nuevo registro para la Argentina. Dos familias (Haliplidae y Dryopidae, cuatro géneros (Haliplus Latreille; Pelonomus Erichson, Onopelmus Spangler, Phaenonotum Sharp y 14 especies son citados por primera vez para la provincia de Corrientes.This study aims to improve the knowledge of aquatic Coleoptera biodiversity in northeastern Argentina. The sampling sites correspond to two permanent ponds located in the department Capital of Corrientes Province, Argentina. The samples were collected between October 2010 and March 2011. A total of 107 species of beetles, including 40 genera and 8 families were recorded: Haliplidae, Dytiscidae, Noteridae, Dryopidae, Hydrochidae, Hydrophilidae, Limnichidae and Scirtidae. Berosus hamatus Knisch is a new record for Argentina. Two families (Haliplidae and Dryopidae, four genera (Haliplus Latreille; Pelonomus Erichson, Onopelmus Spangler, Phaenonotum Sharp and 14 species are cited for the first time for Corrientes Province.

  2. Oribátidos (Acari: Oribatida de la Selva Marginal de Punta Lara, Buenos Aires, Argentina

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    Cecilia ACCATTOLI

    2013-01-01

    Full Text Available En el presente trabajo se relevaron diversos biotopos de la Selva Marginal de Punta Lara, provincia de Buenos Aires, Argentina, para conocer el elenco de ácaros oribátidos que allí habitan. Se hallaron 28 especies, de las que siete resultaron nuevas para Argentina: Epilohmannia sculpturata Balogh & Mahunka, Nothrus willmanni Mahunka, Xenillus (Xenillus fecundus P. Balogh, Xenillus (Xenillus superbus (Perez-Íñigo & Baggio, Zetomimus (Protozetomimus polpaicoensis (Hammer, Pseudotocepheus (Pseudotocepheus pauliensis Pérez-Íñigo & Baggio y Lohmannia (Lohmannia juliae Mahunka. El biotopo más diverso resultó la hojarasca de la selva con 20 especies. Se discuten cuestiones zoogeográficas del sistema estudiado.

  3. Risk Analysis of Acute Or Chronic Exposure to Arsenic of the Inhabitants in a District of Buenos Aires, Argentina

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    Cristina Vázquez

    2016-09-01

    Full Text Available The arsenic occurrence in the water constitutes a serious world health concern due to its toxicity. Depending on the intensity and duration of exposure, this element can be acutely lethal or may have a wide range of health effects in humans and animals. In Argentina, the origin of arsenic is mainly natural, and related to different geological processes. The Argentinean concern about arsenic and its influence on human health dates back to the previous century. The disease ascribed to arsenic contamination was called ‘chronic regional endemic hydroarsenism’. It is produced by the consumption of water with high levels of this element. In our study, we focused in La Matanza district, a very populated site in the Buenos Aires Province. An increasing concern of the inhabitants of the area regarding health problems was detected. In order to establish a full view of arsenic exposure in the area, several matrices and targets were analyzed. As matrices, water and soil samples were analyzed. As targets, canine and human hair was studied. The aim of this study was to investigate acute and chronically exposure to arsenic of La Matanza inhabitants.

  4. Lutzomyia longipalpis in Clorinda, Formosa province, an area of potential visceral leishmaniasis transmission in Argentina

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    Oscar D Salomón

    2005-08-01

    Full Text Available Phlebotomine captures were performed during 2004 in Clorinda, Argentina. Clorinda is located across the branches of the Paraguay river in front of Asunción city, Paraguay. Reports of canine and human visceral leishmaniasis in Asunción have been increasing since 1997, however neither leishmaniasis cases nor sand flies were ever recorded from Clorinda. Light traps were located in migration paths (bridges, port, and peridomestic environments of Clorinda and surrounding localities. Lutzomyia longipalpis was found in Clorinda and Puerto Pilcomayo, first report in a potential visceral leishmaniasis transmission area for Argentina. Active surveillance is required immediately in the localities involved and the surrounding area.

  5. Liquefaction during the 1977 San Juan Province, Argentina earthquake (Ms = 7.4)

    Science.gov (United States)

    Youd, T.L.; Keefer, D.K.

    1994-01-01

    Liquefaction effects generated by the 1977 San Juan Province, Argentina, earthquake (Ms = 7.4) are described. The larger and more abundant effects were concentrated in the 60-km long band of the lowlands in the Valle del Bermejo and in an equally long band along the Rio San Juan in the Valle de Tulum. Fissures in the Valle del Bermejo were up to several hundred meters long and up to several meters wide. Sand deposits, from boils that erupted through the fissures, covered areas up to tens of square meters. Fissures generally parallelled nearby stream channels. Because the Valle del Bermejo is undeveloped, these large features caused no damage. Liquefaction in the Valle del Tulum caused important or unusual damage at several localities, including the following five sites: (1) At the Barrio Justo P. Castro, a subdivision of Caucete, liquefaction of subsurface sediments decoupled overlying, unliquefied stiff sediments, producing a form of ground failure called "ground oscillation". The associated differential ground movements pulled apart houses and pavements in extension, while shearing curbs and buckling canal linings in compression at the same locality. (2) At the Escuela Normal, in Caucete, the roof of a 30-m long single-story classroom building shifted westward relative to the foundation. That displacement fractured and tilted columns supporting the roof. The foundation was fractured at several places, leaving open cracks, as wide as 15 mm. The cumulative width of the open cracks was 48 mm, an amount roughly equivalent to the 63 mm of offset between the roof and foundation at the east end of the building. The ground and foundation beneath the building extended (or spread) laterally opening cracks and lengthening the foundation while the roof remained in place. (3) The most spectacular damage to structures at the community of San Martin was the tilting of a 6-m high water tower and the toppling of a nearby pump house into a 1-m deep crater. Similarly, a small

  6. Banco de semillas en ambientes de las sierras de Azul (Buenos Aires, Argentina con distinta intensidad de disturbios Seed bank in environments of the Azul sierras (Buenos Aires, Argentina with different disturbance intensities

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    F. Gianaccini

    2009-12-01

    Full Text Available A fin de evaluar el impacto de la agricultura sobre la flora potencial de pastizales serranos en el Partido de Azul (Buenos Aires, Argentina, se comparó el banco de semillas en los 20 cm superficiales del suelo entre dos sectores adyacentes en las primeras estribaciones serranas. Uno de ellos está sometido a agricultura permanente y el otro conserva un pastizal natural bajo pastoreo y quemas no programados. Este último sector presentó en promedio una densidad de 70.000 sem m-2 contra 36.720 sem m-2 en el primero. La representación de semillas de especies nativas se redujo notablemente en el ambiente agrícola. Stipa caudata con 31360 sem m-2 resultó la especie más abundante en el pastizal. En el ambiente de cultivo, su densidad se redujo a 9940 sem m-2 y fue superada por Chenopodium album con 10560 sem m-2. La similitud en la composición del banco fue de 55% en términos cualitativos y 27% en términos cuantitativos. Estos resultados evidencian que, en el área de estudio, el reemplazo del pastizal natural por agricultura reduce notoriamente las reservas de semillas y modifica la composición cualitativa y cuantitativa del banco con una elevada pérdida en la proporción de especies nativas.In order to evaluate the impact of agriculture on the potential flora of grasslands of the sierras of Azul (Buenos Aires Province, Argentina, the soil seed bank in the top 20 cm from two adjacent areas on the first foothill spurs were compared. One is submitted to continuous agriculture. The other area has grasslands under grazing and non programmed burning. The latter showed a mean density of 70.000 seeds m-2 against a mean density of 36.720 seeds m-2 in the first area. The proportional representation of native species seeds decreased strongly in the agricultural environment. The most abundant species in the grasslands was Stipa caudata (31.360 seeds m-2. In the agricultural environment, its density decreased to 9940 seeds m-2. It was surpassed by

  7. Spider fauna associated with wheat crops and adjacent habitats in Buenos Aires, Argentina Araneofauna asociada a cultivos de trigo y hábitats adyacentes en Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Andrea Armendano

    2011-12-01

    Full Text Available A census of spiders was undertaken in winter wheat fields of Buenos Aires province, Argentina, as well as from their margins and from wheat stubble. Spiders were collected weekly over 3 consecutive years using entomological sweeping and pitfall traps. Field margins were the richest and densest habitats (H'= 3.27, J'= 0.82 and registered 52 species from 14 families, while 31 species from 13 families were found in wheat. Thomisidae and Araneidae were the most abundant families in the herbaceous layer of both the margins and the crop, and Lycosidae in the soil litter. In contrast, 17 species from 8 families were recorded from wheat stubble, making it the least diverse habitat surveyed (H'= 1.67, J'= 0.72. These results could be related to repeated disturbance of wheat fields by harvest, tillage and other field work. Furthermore, the similarity observed in the families of both margin and crop communities indicates that colonization of wheat fields is from the adjacent areas.Se realizó un censo de arañas en cultivos de trigo de invierno de la provincia de Buenos Aires, Argentina, así como en sus márgenes y en el rastrojo. Las arañas fueron recolectadas semanalmente con redes entomológicas y trampas de caída durante 3 años consecutivos. El margen del cultivo fue el hábitat más rico y más denso (H'= 3.27, J'= 0,82 y registró un total de 52 especies pertenecientes a 14 familias, mientras que en el cultivo de trigo se encontraron 31 especies pertenecientes a 13 familias. Thomisidae y Araneidae fueron las familias más abundantes en el estrato herbáceo (tanto en los márgenes como en el cultivo y Lycosidae en el suelo; mientras que en el rastrojo del trigo se registraron 17 especies representantes de 8 familias y fue el hábitat menos diverso (H'= 1.67, J'= 0,72. Estos resultados podrían estar relacionados con el disturbio repetido, debidos a la cosecha, la labranza y otros trabajos de campo. Por otra parte, la similitud observada entre las

  8. First Late Triassic Record of a Paleoentomofauna from South America(Malargüe Basin,Mendoza Province,Argentina)

    Institute of Scientific and Technical Information of China (English)

    Carsten BRAUCKMANN; Oscar F.GALLEGO; Norbert HAUSCHKE; Rafael G.MARTINS-NETO; Elke GROENING; Jan-M.ILGER; María B.LARA

    2010-01-01

    Late Middle Triassic to early Late Triassic insects from Argentina have been previously described from the Bermejo and Cuyana Basins where they have been recovered from the Ischichuca-Los Rastros and Potrerillos-Cacheuta Formations,respectively.The insect fauna discussed herein was collected during field studies in 1986/1987 from the Llantenes section(Norian to Rhaetian? Late Triassic),which is situated in the Malargtie Basin in southern Mendoza province.The insect remains were found in the upper part of the Llantenes section(Llantenes Formation),which is built up of two coarsening-upwards cycles reflecting a deltaic progradation of a fluvial into a lacustrine environment(lower part),succeeded by repeated progradations into a floodplaindominated environment(upper part; with finds of insects,conchostracans,fish remains,plant fragments,and drifted logs).The new finds represent the youngest Triassic insect records described from Argentina and even from South America in its entirety.There is only one contemporaneous fossil assemblage in Gondwana:in the Clarence/Moreton Basin(Aberdare Conglomerate; Late Norian)in Australia.The new Triassic insects include an impression of an isolated Mecopterida-like wing(Mendozachorista volkheimeri gen.et sp.nov.;Mendozachoristidae fam.nov.),coleopteran elytra of the Permosynidae(Ademosyne rosenfeldi sp.nov.and Ademosyne llantenesensis sp.nov.)and other isolated body fragments.This new Late Triassic entomofauna from Argentina is of considerable importance in the reconstruction of the biotic recovery of continental environments in Gondwana after the catastrophic mass extinction at the P/T boundary.

  9. Populus spp.: supervivencia y crecimiento en clones implantados en Buenos Aires, Argentina

    OpenAIRE

    Marlats, Raúl M.; Senisterra, Gabriela; Marquina, Jorge; Ciocchini, Gabriel R.

    2009-01-01

    El objetivo de este trabajo fue evaluar la supervivencia, evolución de las alturas y áreas basales de rebrotes de clones de Populus spp. de diferentes procedencias implantados en Argiudoles típicos del borde Sur de la Pampa Ondulada, Buenos Aires, Argentina (34°55' S; 57°57' W; 15 m snm). Los clones evaluados fueron ‘Delta Gold’, ‘Stoneville 71’, ‘Catfish 2’, ‘Harvard’, ‘Onda’ e ‘I-74/51’. Se compararon, para el conjunto de clones, los comportamientos para el primero y segundo corte. Se re...

  10. Changes in the land use in the valley of Escaba (Province of Tucuman, Argentina) and their environmental implications

    International Nuclear Information System (INIS)

    The objective of this work was to evaluate changes in the land use due to the construction of a dam and reservoir in the valley of Escaba, located southwest of the province of Tucuman ( north of Argentina ) and its implications for the atmosphere. Aerial photographs and satellite images were used for the study. The results show changes in the drainage network of rivers flowing into the center of the valley, changes in base levels and the formation of wetlands of high ecological, social and economic values. The existence of archaeological sites, some of which remain under water and crop areas that have expanded into both riverbanks stands . The enclosure of the valley caused large areas of land disappear under water, altering not only the landscape but also land use and lifestyle of the population, much of which had to be relocated to higher areas

  11. 76 FR 80870 - Notice of Determination of Pest-Free Areas in Mendoza Province, Argentina

    Science.gov (United States)

    2011-12-27

    ...\\ in the Federal Register on June 25, 2010 (75 FR 36347-36348, Docket No. APHIS- 2010-0032), in which... (76 FR 51934-51935, Docket No. APHIS-2010-0032), in which we announced the availability, for review..., Argentina AGENCY: Animal and Plant Health Inspection Service, USDA. ACTION: Notice. SUMMARY: We are...

  12. Hydrogeology aspects of the Tandilia piedmont region (Buenos Aires, Argentine); Aspectos hidrogeologicos de la region periserrana de Tandilia (Buenos Aires, Argentina)

    Energy Technology Data Exchange (ETDEWEB)

    Silva Busso, A. A.; Amato, S. D.

    2011-07-01

    The Sierras de Tandilia piedmont area is a region trending NW-SE from the Atlantic Ocean to the China Hills (Olavarria) in the southeast of the province of Buenos Aires. Despite the intense demand for groundwater in the area, more so than in almost any other part of Argentina, knowledge about the aquifers is very scarce or highly localized. In a large part of the region little or nothing is known about the aquifer units, which might afford very important comparative benefits in terms of potential water exploitation rates. The aim of this study has been to analyse the main features of these aquifers, bearing in mind their different sedimentary architectures (depositional characteristics of the region), to define the basic hydrogeologic models. We also include a brief analysis of the hydraulic characteristics determined in these aquifers with reference to their architectural types. We have identified various types of aquifer: leaky, unconfined, semi-unconfined, and fractured, and obtained very diverse transmissivity values, from 30 m2/d with specific flow capacities of 1 m3/hm, to 500 m2/d with specific flow capacities of 20 m3/hm or more. We propose that these variations in the hydraulic characteristics of the aquifers conditioned to a great extent by the hydro stratigraphy and, especially, the types of sedimentary architecture that go to framing the hydrogeologic models in this region. (Author) 37 refs.

  13. Redescripción de la obrera de Solenopsis leptanilloides (Hymenoptera: Formicidae y primera cita de la provincia de La Pampa (Argentina Redescription of the worker of Solenopsis leptanilloides (Hymenoptera: Formicidae and first record from La Pampa Province, (Argentina

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    José Luis M. Pall

    2009-12-01

    Full Text Available La descripción de Solenopsis leptanilloides Santschi es incompleta hasta el presente, por ello en esta contribución se redescribe la obrera y se cita por primera vez para la provincia de La Pampa (Argentina. El material estudiado, compuesto por obreras, fue recolectado en el interior de los nidos de Acromyrmex striatus Roger en la periferia de la ciudad de Santa Rosa, provincia de La Pampa.Description of Solenopsis leptanilloides Santschi is presently incomplete. This contribution includes a redescription of the worker and the species is mentioned for the first time from the Province of La Pampa (Argentina. The material studied - comprising workers only - was collected from within nests of Acromyrmex striatus Roger in the environs of the city of Santa Rosa, La Pampa province.

  14. Diatomeas marinas de aguas costeras de la provincia de Buenos Aires (Argentina.: III Géneros potencialmente nocivos Asterionellopsis, Cerataulina, Ceratoneis y Leptocylindrus Marine diatoms from Buenos Aires coastal waters (Argentina: Ill Potentially harmful genus Asterionellopsis,Cerataulina, Ceratoneis y Leptocylindrus

    Directory of Open Access Journals (Sweden)

    INÉS SUNESEN

    2007-12-01

    Full Text Available El presente trabajo está abocado al estudio morfológico, taxonómico y distribucional de las especies de diatomeas pertenecientes a los géneros Asterionellopsis, Cerataulina, Ceratoneis y Leptocylindrus halladas en aguas costeras marinas de la provincia de Buenos Aires, Argentina. Las muestras planctónicas fueron colectadas en San Clemente del Tuyú, Santa Teresita, La Lucila del Mar, Mar de Ajó, Nueva Atlantis, Pinamar y Villa Gesell, entre noviembre de 1994 y septiembre de 2000. Material sin tratar y tratado fue analizado con microscopio óptico y microscopio electrónico de barrido. Seis taxa correspondientes a los géneros mencionados fueron determinados, de los cuales Cerataulina dentata es citada por primera vez para Argentina y Leptocylindrus minimus es citada por primera vez para el área costera de la provincia de Buenos Aires. Todas las especies reportadas como nocivas no toxígenas para otras áreas geográficas fueron encontradas. Cerataulina pelágica, Ceratoneis closterium y Leptocylindrus minimus, componentes ocasionales del plancton del área siempre en bajas densidades, no fueron nunca asociadas a episodios de floración. Asterionellopsis glacialis, componente habitual del plancton, fue causante de discoloraciones nocivas para el turismo y las actividades recreacionalesThe present work is devoted to the morphological, taxonomic, and distributional study of the diatom species belonging to the genera Asterionellopsis, Cerataulina, Ceratoneis and Leptocylindrus found in the marine coastal waters of Buenos Aires Province, Argentina. Planktonic samples were collected from November 1994 to September 2000 at San Clemente del Tuyú, Santa Teresita, La Lucila del Mar, Mar de Ajó, Nueva Atlantis, Pinamar and Villa Gesell. Raw and cleaned samples were analysed with light and scanning electron microscopy. Six taxa of the mentioned genera were determined, of which Cerataulina dentata is reported for the first time for Argentina and

  15. Air quality monitoring system using lichens as bioindicators in Central Argentina.

    Science.gov (United States)

    Estrabou, Cecilia; Filippini, Edith; Soria, Juan Pablo; Schelotto, Gabriel; Rodriguez, Juan Manuel

    2011-11-01

    Air quality studies with bioindicators have not been well developed in South America. In the city of Córdoba, there are not permanent air pollutant measurements by equipment. In order to develop an air quality biomonitoring system using lichens, we applied a systematic sampling in the city of Córdoba, Argentina. A total of 341 plots were sampled in the area of the city which is a square of 24 × 24 km. In each sample plot we selected three phorophytes and estimated the frequency and cover of lichen species growing at 1.5 m on trunks. We also calculated the Index of Atmospheric Purity (IAP) using lichen frequencies. Maps with number of lichen species, cover values, and IAP were performed. The lichen community was described with nine species where Physcia undulata and Physcia endochryscea were the most frequent. Moreover, these two species were dominant in the community with the highest cover index. The central area of the city is considered a lichen desert with poor air quality. The southeast and northwest areas of the city showed the highest IAP values and number of species. In general, the city shows fair air quality and few areas with good and very good air quality. PMID:21336488

  16. Emplacement history and inflation evidence of a long basaltic lava flow located in Southern Payenia Volcanic Province, Argentina

    Science.gov (United States)

    Bernardi, Mauro I.; Bertotto, Gustavo W.; Jalowitzki, Tiago L. R.; Orihashi, Yuji; Ponce, Alexis D.

    2015-02-01

    The El Corcovo lava flow, from the Huanul shield volcano in the southern Mendoza province (central-western Argentina) traveled a distance of 70 km and covered a minimum area of ~ 415 km2. The flow emplacement was controlled both by extrinsic (e.g., topography) and intrinsic (e.g., lava supply rate, lava physicochemical characteristics) factors. The distal portion of the lava flow reached the Colorado River Valley, in La Pampa Province, where it spread and then was confined by earlier river channels. Cross-sections through the flow surveyed at several localities show two vesicular layers surrounding a dense central section, where vesicles are absent or clustered in sheet-shaped and cylindrical-shaped structures. Lavas of the El Corcovo flow are alkaline basalts with low values of viscosity. The morphological and structural characteristics of the flow and the presence of landforms associated with lava accumulation are the evidence of inflation. This process involved the formation of a tabular sheet flow up to 4 m of thick with a large areal extent in the proximal sectors, while at terminal sectors frontal lobes reached inflation values up to 10 m. The numerous swelling structures present at these portions of the flow suggest the movement of lava in lava tubes. We propose that this aspect and the low viscosity of the lava allowed the flow travel to a great distance on a gentle slope relief.

  17. Introducing Simple Detection of Bioavailable Arsenic at Rafaela (Santa Fe Province, Argentina Using the ARSOlux Biosensor

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    Konrad Siegfried

    2015-05-01

    Full Text Available Numerous articles have reported the occurrence of arsenic in drinking water in Argentina, and the resulting health effects in severely affected regions of the country. Arsenic in drinking water in Argentina is largely naturally occurring due to elevated background content of the metalloid in volcanic sediments, although, in some regions, mining can contribute. While the origin of arsenic release has been discussed extensively, the problem of drinking water contamination has not yet been solved. One key step in progress towards mitigation of problems related with the consumption of As-containing water is the availability of simple detection tools. A chemical test kit and the ARSOlux biosensor were evaluated as simple analytical tools for field measurements of arsenic in the groundwater of Rafaela (Santa Fe, Argentina, and the results were compared with ICP-MS and HPLC-ICP-MS measurements. A survey of the groundwater chemistry was performed to evaluate possible interferences with the field tests. The results showed that the ARSOlux biosensor performed better than the chemical field test, that the predominant species of arsenic in the study area was arsenate and that arsenic concentration in the studied samples had a positive correlation with fluoride and vanadium, and a negative one with calcium and iron.

  18. Introducing Simple Detection of Bioavailable Arsenic at Rafaela (Santa Fe Province, Argentina) Using the ARSOlux Biosensor

    Science.gov (United States)

    Siegfried, Konrad; Hahn-Tomer, Sonja; Koelsch, Andreas; Osterwalder, Eva; Mattusch, Juergen; Staerk, Hans-Joachim; Meichtry, Jorge M.; De Seta, Graciela E.; Reina, Fernando D.; Panigatti, Cecilia; Litter, Marta I.; Harms, Hauke

    2015-01-01

    Numerous articles have reported the occurrence of arsenic in drinking water in Argentina, and the resulting health effects in severely affected regions of the country. Arsenic in drinking water in Argentina is largely naturally occurring due to elevated background content of the metalloid in volcanic sediments, although, in some regions, mining can contribute. While the origin of arsenic release has been discussed extensively, the problem of drinking water contamination has not yet been solved. One key step in progress towards mitigation of problems related with the consumption of As-containing water is the availability of simple detection tools. A chemical test kit and the ARSOlux biosensor were evaluated as simple analytical tools for field measurements of arsenic in the groundwater of Rafaela (Santa Fe, Argentina), and the results were compared with ICP-MS and HPLC-ICP-MS measurements. A survey of the groundwater chemistry was performed to evaluate possible interferences with the field tests. The results showed that the ARSOlux biosensor performed better than the chemical field test, that the predominant species of arsenic in the study area was arsenate and that arsenic concentration in the studied samples had a positive correlation with fluoride and vanadium, and a negative one with calcium and iron. PMID:26006123

  19. The blue land planarian Caenoplana coerulea, an invader in Argentina La planaria terrestre azul Caenoplana coerulea, un invasor en Argentina

    OpenAIRE

    Lisandro Héctor Luis-Negrete; Francisco Brusa; Leigh Winsor

    2011-01-01

    The blue land planarian Caenoplana coerulea is reported from Argentina (Buenos Aires province). We found C. coerulea in the east central region of Argentina in anthropic environments. The specimens that we found have the characteristic of the species found in others regions; that is, a bluish dorsal surface with a yellow mid-dorsal stripe and eyes forming a single row around the anterior tip, clustered laterally. This is the first record of this species from the Neotropical Region, and togeth...

  20. "Zafar," So Good: Middle-Class Students, School Habitus and Secondary Schooling in the City of Buenos Aires (Argentina)

    Science.gov (United States)

    Meo, Analia Ines

    2011-01-01

    This article examines how students from the "loser" sections of the middle class dealt with the game of secondary schooling in a "good" state school in the city of Buenos Aires (Argentina). It engages with Bourdieu's theory of social practice and, in particular, with its concepts of game, habitus and cultural capital. It argues that middle-class…

  1. Municipal waste management and groundwater contamination processes in Córdoba Province, Argentina

    Directory of Open Access Journals (Sweden)

    Daniel Emilio Martínez

    2010-12-01

    Full Text Available In Coronel Moldes, Argentina, waste management practices consist in municipal waste being tipped directly onto an area of sand dunes at the municipal waste disposal site (MWDS. Moreover, untreated liquid waste from septic tanks and latrines from urban areas are discharged in the same place. This co-disposal waste management is very common in many regions of Argentina and its impact on the groundwater of Coronel Moldes has not been evaluated. The study area is located in the vicinity of a MWDS in a flatlands environment that is typical of Argentina. The main objective of this study was to evaluate the impacts on groundwater quality of current waste management practices in order to consider the requirement for new guidelines for sustainable groundwater management. Three groundwater monitoring wells were installed up-, across- and down-gradient of the MWDS. The principal aquifer is formed by sandy silt sediments (loess. Groundwater levels in the area of the MWDS are between 5.6 m and 7.8 m. The Vulnerability index indicates that groundwater in this area has a high vulnerability. Groundwater in the vicinity of the MWDS shows elevated electrical conductivity, high concentrations of Cl-, Na+, and HCO3- ions, COD, BOD5 and aerobic bacteria and less dissolved oxygen than the background values indicating the presence of organic matter. Municipal waste management represents a significant omission in current groundwater protection policy at Coronel Moldes. Strict supervision of solid and liquid municipal waste disposal needs to be instigated in order to ensure that the groundwater remains free of contamination and to allow a sustainable environmental management.

  2. Salud auto-referida y desigualdades sociales, ciudad de Buenos Aires, Argentina, 2005 Self-rated health and social inequalities, Buenos Aires, Argentina, 2005

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    Marcio Alazraqui

    2009-09-01

    Full Text Available La salud auto-referida es un indicador de calidad de vida. ¿Cuál es el impacto de las características socioeconómicas a nivel individual y a nivel de la vecindad, consideradas simultáneamente, en el estado de salud auto-referida a nivel individual? Diseño de análisis multinivel con dos niveles: individual y vecindad. Las fuentes de información fueron: Encuesta Nacional de Factores de Riesgo (muestreo probabilístico multietápico y Censo Poblacional. La regresión lineal muestra que mayores niveles de educación, de ingresos y de categoría laboral se relacionan con mejor salud auto-referida; y el aumento de la edad con peor salud. En el análisis multinivel, a medida que la proporción de individuos con educación inferior aumentaba en la fracción censal, aumentaba también la proporción de individuos con peor salud auto-referida. Mejorar la salud general de la población requerirá estrategias y acciones que disminuyan los niveles de desigualdad social en sus múltiples dimensiones, individual y de vecindad.Self-rated health is a quality-of-life indicator. This study investigates the impact of individual-level and neighborhood-level socioeconomic characteristics, considered simultaneously, on the state of self-rated health at the individual level in Buenos Aires, Argentina. The study employs a two-level (individual and neighborhood multilevel analysis, and the data sources were the 2005 Argentina National Risk Factor Survey (multistage probabilistic sample and the 2001 Population Census. Linear regression shows that higher schooling and income, as well as occupational category, are related to better self-rated health, and increasing age with worse health. In the multilevel analysis, an increase in the proportion (per census tract of individuals with less schooling was associated with an increase in the proportion of individuals with worse self-rated health. Improving the general health of the population requires strategies and action

  3. Pennsylvanian and Cisuralian palynofloras from the Los Sauces area, La Rioja Province, Argentina: Chronological and paleoecological significance

    Energy Technology Data Exchange (ETDEWEB)

    Pasquo, Mercedes di; Azcuy, Carlos L. [University/Organization, CONICET Institute CICyTTP, CICyTTP- CONICET Diamante - CP, Entre Rios (Argentina); Vergel, Maria del M. [INSUGEO-CONICET y Universidad Nacional de Tucuman, Facultad de Ciencias Naturales e Instituto Miguel Lillo, Miguel Lillo 205, San Miguel de Tucuman (Argentina)

    2010-08-01

    Three outcrops of the Libertad and Sauces Formations from the Los Sauces area La Rioja Province, western Argentina, yielded the nine palynoassemblages studied here. Two assemblage zones are defined on the basis of the stratigraphic distribution and ranges of seventy five species of palynomorphs (42 species of spores, 32 pollen taxa and one fungus). Only thirteen species are common to both assemblages and ten species are first records for the Paganzo Basin. Assemblage 1 from the Libertad Formation is dominated by trilete spores of Cristatisporites (lycophyte) and Punctatisporites (pteridophyte). Monosaccate pollen (Coniferales/Cordaitales) is frequently present. Pteridosperms, mostly represented by Cyclogranisporites, are especially abundant in one level together with scarce striate bisaccate pollen grains. Assemblage 2 of the Sauces Formation is dominated by trilete spores related to the Pteridophyta (e.g., Horriditriletes, Converrucosisporites, Granulatisporites) and Sphenophyta. Monosaccate (Cordaitales/Coniferales) and taeniate and non-taeniate bisaccate pollen grains (Pteridospermales/Coniferales), are equally subordinated. Monosulcate pollen (Cycadophyta) and fungi (Portalites gondwanensis) are rare. Assemblage 1 is mainly Moscovian; assemblage 2 Asselian-Sakmarian. This interpretation is based on correlation of assemblage 1 to the DMb (Mid Pennsylvanian) and assemblage 2 to the FS (Early Cisuralian) Biozones of the Paganzo Basin (Argentina). The taxonomic composition of the Ahrensisporites cristatus-Crucisaccites monoletus (Mid-Late Pennsylvanian) and the Protohaploxypinus goraiensis Subzone (Asselian-Sakmarian) of the Vittatina costabilis (Early Cisuralian) Biozones of the Parana Basin (Brazil) support this correlation. The continental freshwater depositional setting of this part of the Paganzo Basin is supported by the dominance of terrestrial palynomorphs and phytoclasts, the presence of coal and carbonaceous shales, and the occurrence of plant megafossils

  4. Sale of medicinal herbs in pharmacies and herbal stores in Hurlingham district, Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Hernán G. Bach

    2014-04-01

    Full Text Available In this paper, the sale of medicinal plants was described in the urban city of Buenos Aires, Argentina. Semi-structured interviews were conducted with pharmacists and herb store owners about different characteristics of retail. Likewise, different types of retailers were compared, and the phytomedicine degree of acceptance was consulted. The percentage of customers who buy medicinal plants in herb stores is higher than in pharmacies. The five most demanded species were: "malva" (Malva sp., 18%; "manzanilla" (Matricaria recutita, 13%; "tilo" (Tiliasp., 12%; "cuasia" (Picrasma crenata, 8%; and "boldo" (Peumus boldus, 7%. In like manner, the most demanded mixes of species were those that had slimming properties, 21%; digestive, 17%; sedative and diuretic, 13%. Of the 32 most frequently requested species, only 13 are native. Phytomedicines were widely accepted in the different kinds of retail stores. It was also emphasized that, contrary to the usual assumption, the choice to consume plants is cultural rather than economic. Due to the acceptance observed in the use of phytomedicines, it must be emphasized the potential that Argentina possesses for the development of this industry.

  5. Factors associated with H pylori epidemiology in symptomatic children in Buenos Aires, Argentina

    Institute of Scientific and Technical Information of China (English)

    Cinthia Goldman; Ricardo Weill; Marcela Zubillaga; Guillermo I Perez-Perez; José Boccio; Andrés Barrado; Mariana Janjetic; Norma Balcarce; Eduardo Cueto Rua; Masaru Oshiro; María L Calcagno; Margarita Martinez Sarrasague; Julián Fuda

    2006-01-01

    AIM: To determine prevalence of H pylori infection in symptomatic children in Buenos Aires, Argentina, and to investigate factors associated with H pylori positivity.METHODS: A total of 395 children with upper gastrointestinal symptoms referred to the Gastroenterology Unit of the Children Hospital "Sor Maria Ludovica"were evaluated for the presence of H pylori by the 13C-Urea Breath Test (13C-UBT). A questionnaire was applied to the recruited population.RESULTS: Prevalence of H pylori infection was 40.0% in tlis population (mean age 9.97 ± 3.1 years). The factors associated with H pylori positivity were number of siblings (P < 0.001), presence of pet cats (P = 0.03)and birds (P = 0.04) in the household, and antecedents of gastritis among family members (P = 0.01). After multivariate analysis, number of siblings [Odds ratio (OR)= 1.39; 95% CI, 1.20-1.61] and contact with pet cats (OR = 1.76; 95% CI, 1.00-3.09) remained as variables associated with H pylori infection.CONCLUSION: The prevalence of H pylori infection in children with upper gastrointestinal symptoms in Argentina was similar to that reported in developed countries. Children from families with a higher crowding index and presence of pet cats have a higher risk of being colonized with H pylori.

  6. Isolation of Rickettsia massiliae from Rhipicephalus sanguineus Ticks, Buenos Aires (Argentina).

    Science.gov (United States)

    Cicuttin, G L; De Salvo, M N; La Rosa, I; Dohmen, F E Gury

    2015-12-01

    Rickettsia massiliae , a member of the spotted fever group of Rickettsia, was first isolated from a Rhipicephalus turanicus tick in France. In the New World, it has been detected in Rhipicephalus sanguineus ticks from different geographical locations in Argentina and the United States, but it has only been isolated in Arizona. The aim of this study was the isolation and genetic characterization of R. massiliae from R. sanguineus ticks collected from dogs in Buenos Aires city, Argentina. In total, 49 R. sanguineus ticks were collected from 10 dogs and grouped into 10 pools of 4-5 specimens. With a PCR assay, which detects a fragment of the Rickettsia genus-specific 23S-5S intergenic space, 1 pool of 5 ticks was found positive. Generated sequences exhibited 100% identity with R. massiliae . A new isolate, named CABA, was obtained from this pool by inoculating it into monolayers of Vero cells. Genotypic characteristics were determined, and results showed that fragments of the 23S-5S intergenic space, ompA, ompB, gltA, htrA, and sca1 genes had great similarity with R. massiliae strain Bar29 (Spain). Although few human cases have been confirmed for this pathogen, its circulation in urban areas is of great importance to public health. This isolation improves knowledge of the circulating pathogen and could improve future diagnostic processes as it allows the production of more specific antigens for serological testing.

  7. Evidence for avian intrathoracic air sacs in a new predatory dinosaur from Argentina.

    Directory of Open Access Journals (Sweden)

    Paul C Sereno

    Full Text Available BACKGROUND: Living birds possess a unique heterogeneous pulmonary system composed of a rigid, dorsally-anchored lung and several compliant air sacs that operate as bellows, driving inspired air through the lung. Evidence from the fossil record for the origin and evolution of this system is extremely limited, because lungs do not fossilize and because the bellow-like air sacs in living birds only rarely penetrate (pneumatize skeletal bone and thus leave a record of their presence. METHODOLOGY/PRINCIPAL FINDINGS: We describe a new predatory dinosaur from Upper Cretaceous rocks in Argentina, Aerosteon riocoloradensis gen. et sp. nov., that exhibits extreme pneumatization of skeletal bone, including pneumatic hollowing of the furcula and ilium. In living birds, these two bones are pneumatized by diverticulae of air sacs (clavicular, abdominal that are involved in pulmonary ventilation. We also describe several pneumatized gastralia ("stomach ribs", which suggest that diverticulae of the air sac system were present in surface tissues of the thorax. CONCLUSIONS/SIGNIFICANCE: We present a four-phase model for the evolution of avian air sacs and costosternal-driven lung ventilation based on the known fossil record of theropod dinosaurs and osteological correlates in extant birds: (1 Phase I-Elaboration of paraxial cervical air sacs in basal theropods no later than the earliest Late Triassic. (2 Phase II-Differentiation of avian ventilatory air sacs, including both cranial (clavicular air sac and caudal (abdominal air sac divisions, in basal tetanurans during the Jurassic. A heterogeneous respiratory tract with compliant air sacs, in turn, suggests the presence of rigid, dorsally attached lungs with flow-through ventilation. (3 Phase III-Evolution of a primitive costosternal pump in maniraptoriform theropods before the close of the Jurassic. (4 Phase IV-Evolution of an advanced costosternal pump in maniraptoran theropods before the close of the Jurassic

  8. [Historical notes on Infectious Diseases Hospital Francisco Javier Muñiz in Buenos Aires, Argentina].

    Science.gov (United States)

    Laval, Enrique

    2012-08-01

    The Infectious Diseases Hospital Francisco Javier Muñiz, Buenos Aires, Argentina, is the oldest in Latin America. It is over 100 years old and has a history worthy of pride. It became known as "Hospital of the pests" and was preceded by the old House of Insulation, which served as a quarantine station during epidemics of cholera, yellow fever and smallpox. The new House of Insulation, built in the neighborhood of Parque Patricios ("Barracks Hospital"), was renamed in 1904 in memory of Francisco Javier Muñiz, a former military doctor, naturalist and paleontologist. Its technical name is "Porteño Care Centre and National Reference Regional Infectious-Contagious Disease". It receives numerous national and foreign undergraduate and postgraduate students in its Departments of Infectious Diseases and Respiratory Diseases. PMID:23096553

  9. Functional foods and nutraceuticals in a market of bolivian immigrants in Buenos Aires (Argentina).

    Science.gov (United States)

    Pochettino, María Lelia; Puentes, Jeremías P; Buet Costantino, Fernando; Arenas, Patricia M; Ulibarri, Emilio A; Hurrell, Julio A

    2012-01-01

    This paper presents the results of a research in urban ethnobotany, conducted in a market of Bolivian immigrants in the neighborhood of Liniers, Ciudad Autónoma de Buenos Aires (Argentina). Functional foods and nutraceuticals belonging to 50 species of 18 families, its products, and uses were recorded. Some products are exclusive from the Bolivian community; others are frequent within the community, but they are also available in the general commercial circuit; they are introduced into it, generally, through shops called dietéticas ("health-food stores"), where products associated with the maintenance of health are sold. On this basis, the traditional and nontraditional components of the urban botanical knowledge were evaluated as well as its dynamics in relation to the diffusion of the products. Both the framework and methodological design are innovative for the studies of the urban botanical knowledge and the traditional markets in metropolitan areas. PMID:22203866

  10. Atmospheric control of Aedes aegypti populations in Buenos Aires (Argentina) and its variability

    Science.gov (United States)

    de Garín, A.; Bejarán, R. A.; Carbajo, A. E.; de Casas, S. C.; Schweigmann, N. J.

    The mosquito Aedes aegypti is the main urban vector responsible for the transmission of dengue fever and dengue hemorrhagic fever. The city of Buenos Aires, Argentina, is located at the southern end of the world distribution of the species. The population abundance of Ae. aegypti is mainly regulated by environmental factors. We calculated the potential number of times that a female could lay eggs during its mean life expectancy, based on potential egg production and daily meteorological records. The model considers those variables implying physical hazard to the survival of Ae. aegypti, mosquito flying activity and oviposition. The results, obtained after calibration and validation of the model with field observations, show significant correlation (Pclimatic change) can be observed. The climatic variability in the last decade resembles conditions at the end of 19th century.

  11. Geomagnetic effects on cosmic ray propagation under different conditions for Buenos Aires and Marambio, Argentina

    CERN Document Server

    Masías-Meza, Jimmy J

    2014-01-01

    The geomagnetic field (Bgeo) sets a lower cutoff rigidity (Rc) to the entry of cosmic particles to Earth which depends on the geomagnetic activity. From numerical simulations of the trajectory of a proton using different models for Bgeo (performed with the MAGCOS code), we use backtracking to analyze particles arriving at the location of two nodes of the net LAGO (Large Aperture Gamma ray burst Observatory) that will be built in the near future: Buenos Aires and Marambio (Antarctica), Argentina. We determine the asymptotic trajectories and the values of Rc for different incidence directions, for each node. Simulations were done using several models for Bgeo that emulate different geomagnetic conditions. The presented results will help to make analysis of future observations of the flux of cosmic rays done at these two LAGO nodes.

  12. HIV status disclosure among infected men who have sex with men (MSM) in Buenos Aires, Argentina.

    Science.gov (United States)

    Carballo-Diéguez, Alex; Balán, Iván C; Dolezal, Curtis; Ibitoye, Mobolaji; Pando, María A; Marone, Rubén; Barreda, Victoria; Avila, María Mercedes

    2013-12-01

    Five hundred men who have sex with men were recruited in Buenos Aires using respondent driven sampling. Of them, 46 respondents (24 of them not gay identified) who were HIV infected were asked questions on serodisclosure. The sample was characterized by indicators of low socioeconomic status. Most of the respondents reported being in good to excellent health despite 42% of them having been diagnosed with AIDS. Only 10% of respondents had not disclosed their serostatus to at least one person. Coworkers and lovers or main sexual partners were those most likely to know the respondents' serostatus. Reactions to disclosure were for the most part supportive. Those who had not disclosed anticipated less favorable reactions than those who had disclosed. No significant differences were observed between gay and non-gay identified respondents. The progressive social environment of Argentina that includes federal laws recognizing gay marriage may contribute to create a climate favorable for serostatus disclosure. PMID:24245593

  13. Atmospheric control of Aedes aegypti populations in Buenos Aires (Argentina) and its variability

    Science.gov (United States)

    de Garín, A.; Bejarán, R. A.; Carbajo, A. E.; de Casas, S. C.; Schweigmann, N. J.

    The mosquito Aedes aegypti is the main urban vector responsible for the transmission of dengue fever and dengue hemorrhagic fever. The city of Buenos Aires, Argentina, is located at the southern end of the world distribution of the species. The population abundance of Ae. aegypti is mainly regulated by environmental factors. We calculated the potential number of times that a female could lay eggs during its mean life expectancy, based on potential egg production and daily meteorological records. The model considers those variables implying physical hazard to the survival of Ae. aegypti, mosquito flying activity and oviposition. The results, obtained after calibration and validation of the model with field observations, show significant correlation (Paegypti reproduction (linked to the urban climatic change) can be observed. The climatic variability in the last decade resembles conditions at the end of 19th century.

  14. Epidermal characteristics of toxic plants for cattle from the Salado River basin (Buenos Aires, Argentina Caracteres epidérmicos de las plantas tóxicas para el ganado de la Depresión del Salado (Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Susana E. Freire

    2005-12-01

    Full Text Available One hundred and eighty species belonging to 41 families inhabiting the Salado River Basin of the province of Buenos Aires (Argentina were previously reported to be toxic for cattle. The purpose of this study was to provide a tool to distinguish the taxa when the plant material is desintegrated. In this way, an approach to the identification of these taxa through leaf epidermal features (anticlinal epidermal cell wall patterns, cuticular ornamentation, stomata, and hair types is performed. A key to the 180 species as well as illustrations of diagnostic characters are given.Las plantas tóxicas para el ganado están representadas en la Depresión del Salado (provincia de Buenos Aires, Argentina por 180 especies pertenecientes a 41 familias. El objetivo del presente trabajo es determinar estos taxa a partir de material desintegrado, utilizando caracteres epidérmicos foliares (paredes anticlinales de las células epidérmicas, ornamentación de la cutícula, tipos de estomas y pelos. Se brinda una clave para la determinación de las especies e ilustraciones de los caracteres diagnósticos.

  15. Becoming "Neuquino" in Mapuzugun: Teaching Mapuche Language and Culture in the Province of Neuquen, Argentina

    Science.gov (United States)

    Szulc, Andrea

    2009-01-01

    This article explores the sense of belonging promoted by the current program of Educacion Intercultural Bilingue (EIB) of the province of Neuquen for Mapuche children, examining the design and implementation of this program. The analysis reveals how this program reinforces a hegemonic definition of Mapuche identity, which relegates Mapuche culture…

  16. Megacity and country emissions from combustion sources-Buenos Aires-Argentina

    Science.gov (United States)

    Dawidowski, L.; Gomez, D.; Matranga, M.; D'Angiola, A.; Oreggioni, G.

    2010-12-01

    Historic time series (1970-2006) emissions of greenhouse gases and air pollutants arising from stationary and mobile combustion sources were estimated at national level for Argentina and at regional level for the metropolitan area of Buenos Aires (MABA). All emissions were estimated using a bottom-up approach following the IPCC good practice guidance. For mobile sources, national emissions include all transport categories. Regional emissions account thus far only for on-road. For national emissions, methodologies and guidance by the IPCC were employed, applying the highest possible tier and using: i)country-specific emission factors for carbon and sulphur and technology-based information for other species, ii)activity data from energy balance series (1970-2007), and iii)complementary information concerning the non-energy use of fuels. Regional emissions in 2006 were estimated in-depth using a technology-based approach for the city of Buenos Aires (CBA) and the 24 neighboring districts composing the MABA. A regional emissions factors database was developed to better characterize Latin American fleets and driving conditions employing COPERT III-IV algorithms and emission factors measured in dynamometers and circulating vehicles in Argentina, Brazil, Chile and Colombia. Past emissions were back estimated from 2005 to 1970 using the best available information, which differs greatly among categories, spatial disaggregation and time periods. The time series of stationary and mobile combustion sources at the national and regional level allowed the identification of distinct patterns. National greenhouse gas emissions in 2006 amounted to ~ 150 million ton CO2-equivalent, 70% of which were contributed by stationary sources. On-road transport was the major contributor within mobile sources (28.1 %). The increasing emissions trends are dominated by on-road transport, agriculture and residential categories while the variability is largely associated with energy industries

  17. Soria 2: Apuntes sobre un sitio Formativo en el valle de Yocavil (Catamarca, Argentina Soria 2: Notes on a formative site in the yocavil valley (Catamarca Province, Argentina

    Directory of Open Access Journals (Sweden)

    Valeria Palamarczuk

    2007-12-01

    Full Text Available En este trabajo se presenta información preliminar sobre el sitio arqueológico Soria 2 de la localidad de Andalhuala Banda, correspondiente al Período Temprano en el sur del valle de Yocavil, provincia de Catamarca, Argentina. Un fechado marca un momento de la ocupación inicial del sitio en 1940 + 80 años radiocarbónicos AP, dato particularmente interesante por tratarse de uno de los pocos contextos de carácter doméstico conocidos hasta el momento para los inicios del primer milenio en el sur de Yocavil que han podido ser fechados. La excavación permitió reconocer dos recintos cuyos trazados eran parcialmente visibles en superficie. Dentro de estos se definió un piso de gran espesor con abundante material cerámico, lítico y faunístico, que presentaba diversos rasgos como un fogón, varios agujeros de poste y un pozo de basura -que contenía, entre otros muchos materiales, los restos de un hornillo de pipa cerámica-. Se hallaron también dos entierros primarios de neonatos en ollas de tipo doméstico y el entierro secundario de un párvulo, presentando ajuar. Este aporte junto con futuros trabajos en la zona permitirá bosquejar aspectos de la vida cotidiana de las sociedades agropastoriles tempranas en la región que permanecen esquivos al conocimiento actual.This report presents preliminary information on the Early Period archaeological site of Soria 2 in the locality of Andalhuala Banda in the south of Yocavil Valley ( Catamarca Province, Argentina. A radiocarbon date of 1940 ± 80 radiocarbon years BP marks one moment of the initial site occupation. This information is particularly revealing as it represents one of the few successfully dated domestic-use contexts that dates to the beginning of the first millennium in the south of Yocavil. Through excavation it was possible to identify two occupation units that were only partially detectable on the surface due to poor visibility. A thick and rich stratum was defined within these

  18. Very long pahoehoe inflated basaltic lava flows in the Payenia volcanic province (Mendoza and la Pampa, Argentina

    Directory of Open Access Journals (Sweden)

    Giorgio Pasquarè

    2008-03-01

    Full Text Available Extremely long basaltic lava flows are here presented and described. The flows originated from the great, polygenetic, fissural Payen Volcanic Complex, in the Andean back-arc volcanic province of Payenia in Argentina. The lava flows outpoured during the Late Quaternary from the summit rift of a shield volcano representing the first volcanic centre of this complex. One of these flows presents an individual tongue-like shape with a length of 181 km and therefore is the longest known individual Quaternary lava flow on Earth. Leaving the flanks of the volcano this flow reached the Salado river valley at La Pampa and, in its distal portion, maintained its narrow and straight shape without any topographic control over a flat alluvial plain. It has a hawaiite composition with low phenocryst content of prevailing olivine and minor plagioclase. Rare Earth element patterns are typical of Na-alkaline basalts, but incompatible trace element patterns and Sr -Nd isotope ratios, suggest a geodynamic setting transitional to the orogenic one. The flow advanced following the thermally efficient "inflation" mechanism, as demonstrated by a peculiar association of well developed morphological, structural and textural features. The temperature of 1130-1160°C and the viscosity of 3-73 Pa*s, calculated by petrochemical data, may be considered, together with a very low cooling rate and a sustained and long lasting effusion rate, the main causes of the extremely long transport system of this flow. Both the extreme length of the flow and the partial lack of topographic control may provide new constraints on the physics of large inflated flows, which constitute the largest volcanic provinces on Earth and probably also on the terrestrial planets.

  19. Serological evidence of Rickettsia and Coxiella burnetii in humans of Buenos Aires, Argentina.

    Science.gov (United States)

    Cicuttin, Gabriel Leonardo; Degiuseppe, Juan Ignacio; Mamianetti, Andrea; Corin, Marcela Viviana; Linares, María Cielo; De Salvo, María Nazarena; Dohmen, Federico Eugenio Gury

    2015-12-01

    In Buenos Aires city (Argentina), the circulation of these agents has been detected mainly in vectors and animals, few human cases having been described. The aim of our study was to determine the seroprevalence of Rickettsia (spotted fever--SFG--and typhus--TG--groups) and Coxiella burnetii (Q fever agent) in residents of Buenos Aires city. The study involved 99 participants. Rickettsia IgG antibodies against SFG and TG were detected by IFA in 28.3% and 16.2% of serum samples, respectively. SFG titers were mostly 1/64 (53.6%) with a maximum of 1/512 (3.5%) whereas TG titers ranged between 1/64 (62.5%) and 1/256 (6.3%). Only one sample showed a titer of 1/32 for C. burnetii (phases I and II). The circulation of these pathogens in urban areas such as the city of Buenos Aires should be considered by health services, especially at the primary care level.

  20. Culicidae (Diptera selection of humans, chickens and rabbits in three different environments in the province of Chaco, Argentina

    Directory of Open Access Journals (Sweden)

    Marina Stein

    2013-08-01

    Full Text Available Studies were conducted to determine the selection of humans, chickens and rabbits by Culicidae in three different environments in the province of Chaco, Argentina. Mosquitoes were collected fortnightly using cylindrical metal traps containing animal bait (chickens and rabbits. The mosquitoes were collected between June 2001-May 2002. During the same period and with the same frequency, mosquitoes biting the human operators of the traps were collected during the first 15 min of exposure within different time intervals: from 09:00 am-11:00 am, 01:00 pm-03:00 pm, 05:00 pm-07:00 pm and 09:00 pm-10:00 pm. A total of 19,430 mosquitoes of 49 species belonging to 10 genera were collected. Culex species mainly selected chicken bait and Wyeomyia species selected rabbit bait. Ochlerotatus and Psorophora species were more abundant in rabbit-baited traps. Anopheles triannulatus, Coquillettidia nigricans, Ochlerotatus scapularis, Mansonia titillans and Psorophora albigenu showed a strong attraction for human bait. The Anopheles, Coquillettidia, Culex and Mansonia species were more active between 05:00 pm-09:00 pm, while Ochlerotatus, Psorophora, Haemagogus and Wyeomyia were most active from 09:00 am-07:00 pm. This study provides additional information about the biology and ecology of arbovirus vectors in Chaco.

  1. Geochemistry of uranium in ground waters of the Conlara river Valley, San Luis and Cordoba provinces (Argentina)

    International Nuclear Information System (INIS)

    Geochemical characteristics of ground waters related with lixiviation, transport and precipitation of uranium in the Conlara river valley (provinces of San Luis and Cordoba (Argentina)) are studied. Anions and cations' distributions, together with hardness, specific conductivity, pH, Eh, and uranium and vanadium contents, have been studied. Those parameters characterize four hidrogeochemical facies along an E-W profile: a calcic strong bicarbonate facies, an alkaline-calcic bicarbonate facies, an alkaline sulfate facies, and a strong alkaline sulfate facies. An ''Interphase zone'' (transition from bicarbonate water to sulfate water), where changes in composition may define a geochemical environment capable of UO2 precipitation, has been determined. The chemical-Thermodynamic studies give a dominance of UDC and UTC complexs ions (even in sulfate waters), so they represent the 99% of present ions. Besides, the calculated values required for equilibrium with uraninite or carnotite resulted much greater than those obtained in the performed experiments. It means that the precipitation of those minerals requires either the presence of greate amounts of uranium or vanadium, or a reducing environment with Eh values smaller than the observed ones. Finally, the steps to be taken in future investigations are suggested in view to a drilling plan where: 1) Priority to the ''Interphase zone'' areas is given. 2) The deepest aquifers in Tertiary sediments of the basin have to be reached in order to get the convenient environmental conditions (i.e. smallest Eh values) for uranium or uranium-vanadium precipitation. (author)

  2. Subsurface geological modeling of Corrientes province (NE Argentina) and its relationships with the Guaraní Aquifer system function

    Science.gov (United States)

    Mira, Andrés; Veroslavsky, Gerardo; Rossello, Eduardo; Vives, Luis; Rodríguez, Leticia

    2015-10-01

    From the integration results of geological and geophysical data, a subsurface geological model of the Corrientes province (Argentina) that allows visualizing its deep geological structure and how it affected the Guaraní Aquifer System (GAS) is presented. 44 boreholes, 21 geophysical surveys and 1366 depth data from a Bouguer gravity anomaly model have been used. The model was built from five layers easily distinguishable in the regional subsurface: basement, pre-GAS sediments (Paleozoic), GAS sediments (Triassic-Lower Cretaceous), basalts (Serra Geral Group, Lower Cretaceous) and post basaltic sediments. The resulting geometry shows a basement with a structural high, the Dorsal Asunción-Rio Grande, where the GAS and the basaltic layer are thinner and the Mesozoic sediments rise near the surface. It is an area prone to local recharge and regional discharge of the GAS and it is in line with the latest piezometry and groundwater chemical analysis. Furthermore, two important depocenters have been identified, Corrientes and Curuzú structural high blocks, with at least 3500 m of sedimentary and volcano-sedimentary deposits that suggest the existence of significant pre-carboniferous sediment units associated to ancient extensional structures of the early Paleozoic. The proposed model allows defining a lithostratigraphic column of Corrientes and gives new criteria to redraw the southwest limit of the GAS.

  3. Garrapatas (Acari: Ixodidae asociadas a perros en diferentes ambientes de la provincia de Corrientes, Argentina Ticks (Acari: Ixodidae of dogs in different environments of the Corrientes Province, Argentina

    Directory of Open Access Journals (Sweden)

    V.N. Debárbora

    2011-06-01

    Full Text Available Se estudiaron las garrapatas (Acari: Ixodidae de perros en ambientes urbanos, periurbanos y rurales de la provincia de Corrientes por medio de colecciones mensuales durante un año en siete sitios diferentes. De los 138 perros examinados, en 87 (63,04% se determinaron tres especies de garrapatas: Amblyomma tigrinum (n=35, Amblyomma ovale (n=2 y Rhipicephalus sanguineus sensu lato (n=523. Las mayores prevalencias para A. tigrinum y R. sanguineus s.l. fueron halladas en ambientes rurales. Especímenes de R. sanguineus s.l. fueron detectados a lo largo de todo el año, con picos de abundancia en primavera y verano, A. tigrinum fue encontrada en otoño, invierno y primavera con un pico en esta última estación, mientras que A. ovale fue colectada sólo en primavera. Rhipicephalus sanguineus s.l. y A. tigrinum fueron halladas en todos los ambientes muestreados, pero el primer taxón fue siempre el más abundante. Teniendo en cuenta que las especies del complejo R. sanguineus son potenciales vectores de microorganismos patógenos para los perros y humanos, y debido a la alta prevalencia registrada en este estudio, queda en evidencia la relevancia de aplicar métodos para su control en las áreas incluidas en este estudio.Ticks (Acari: Ixodidae of dogs in urban, peri-urban and rural areas from the Corrientes Province, Argentina, were studied. They were monthly collected during one year at 7 different sites. A total of 138 dogs were examined, and 87 (63.04% of them were infested; and three species were determined: Amblyomma tigrinum (n=35, Amblyomma ovale (n=2 and Rhipicephalus sanguineus sensu lato (n=523. Both A. tigrinum and R. sanguineus s.l. had the highest prevalence in rural areas. Specimens of R. sanguineus s.l. were collected in the four seasons, but the peaks of abundance were detected in spring and summer. Amblyomma tigrinum was found in autumn, winter and spring, with the peak of abundance in spring, and the two specimens of A. ovale were

  4. Bionomics of Aedes aegypti subpopulations (Diptera: Culicidae) from Misiones Province, northeastern Argentina.

    Science.gov (United States)

    Tejerina, Edmundo Fabricio; Almeida, Francisco Felipe Ludueña; Almirón, Walter Ricardo

    2009-01-01

    Life statistics of four Aedes aegypti subpopulations from the subtropical province of Misiones were studied during autumn and winter, under semi-natural conditions, coming from the localities of Posadas (SW), San Javier (SE), Bernardo de Irigoyen (NE) and Puerto Libertad (NW). The eastern subpopulations are geographically separated by the central mountain system of the province from the western subpopulations. High percentages of larval and pupal survival (97-100%) were recorded, and no significant differences were detected among the four subpopulations. Larvae and pupae lasted approximately 8 days to complete their development, no significant differences being detected among the four subpopulations studied. Sex ratio recorded did not differ significantly from 1:1. Male longevity did not show difference among the different subpopulations, but female longevity was remarkably different among the four subpopulations (F=16.27; d.f.=(3;8); P=0.0009), ranging among 11.45 days for San Javier and 57.87 days for Posadas. Fecundity also varied considerably among subpopulations, the greatest number (307.44 eggs/female) being recorded for Posadas (F=4.13; d.f.=(3;8); P=0.04). Ae. aegypti females of the western subpopulations lived longer than the eastern subpopulations studied, therefore, the risk of dengue outbreak would be greater on the Misiones Province border with Paraguay.

  5. Rocas para moler: análisis de procedencia de materias primas líticas para artefactos de molienda (área Interserrana Bonaerense Rocks For Grinding: Lithic Raw Material Provenience Studies Of Grinding Technology, Interserrana Area Of Buenos Aires Province, Argentina

    Directory of Open Access Journals (Sweden)

    Alejandra B. Matarrese

    2009-06-01

    Full Text Available Los artefactos de molienda representan frecuentemente grandes volúmenes de roca trasportados a los sitios arqueológicos del área Interserrana Bonaerense. En el contexto de los recientes estudios sistemáticos en relación a estos artefactos, en este trabajo se presentan los resultados de los análisis macroscópicos, de cortes delgados y de difracción de rayos X de una muestra de instrumentos confeccionados sobre materias primas sedimentarias y metamórficas. De manera complementaria, se consideran características de las formas-base y los pesos de parte de los artefactos estudiados. Los datos obtenidos se discuten respecto a la procedencia y estrategias de explotación de estos recursos líticos utilizados para los artefactos de molienda. Se identificó en los conjuntos estudiados el uso de rocas disponibles en afloramientos de los sistemas serranos pampeanos de Tandilia y Ventania e interserranos. El trasladado de estas materias primas líticas a los contextos bajo estudio implicaron diferentes esfuerzos de aprovisionamiento (locales, de media y de larga distancia. Las características petrográficas de las rocas seleccionadas para la producción de los artefactos de molienda se relacionan principalmente con una alta capacidad abrasiva. En algunos casos, se habrían aprovechado formas-base naturales aptas para ser usadas sin modificaciones previas. Estos datos comprenden un primer acercamiento a la gestión de recursos líticos para la manufactura y/o uso de artefactos de molienda por parte de grupos cazadores-recolectores prehispánicos pampeanos durante el Holoceno tardío.Grinding tools frequently comprise great volumes of rocks transported to the archaeological sites of the Interserrana area of Buenos Aires Province. The results from thin section and X-ray diffraction analyses of a sample of grinding artifacts manufactured from sedimentary and metamorphic raw material are presented in this paper in the context of recent systematic

  6. Holocene compression in the Acequión valley (Andes Precordillera, San Juan province, Argentina): Geomorphic, tectonic, and paleoseismic evidence

    Science.gov (United States)

    Audemard, M.; Franck, A.; Perucca, L.; Laura, P.; Pantano, Ana; Avila, Carlos R.; Onorato, M. Romina; Vargas, Horacio N.; Alvarado, Patricia; Viete, Hewart

    2016-04-01

    The Matagusanos-Maradona-Acequión Valley sits within the Andes Precordillera fold-thrust belt of western Argentina. It is an elongated topographic depression bounded by the roughly N-S trending Precordillera Central and Oriental in the San Juan Province. Moreover, it is not a piggy-back basin as we could have expected between two ranges belonging to a fold-thrust belt, but a very active tectonic corridor coinciding with a thick-skinned triangular zone, squeezed between two different tectonic domains. The two domains converge, where the Precordillera Oriental has been incorporated to the Sierras Pampeanas province, becoming the western leading edge of the west-verging broken foreland Sierras Pampeanas domain. This latter province has been in turn incorporated into the active deformation framework of the Andes back-arc at these latitudes as a result of enhanced coupling between the converging plates due to the subduction of the Juan Fernández ridge that flattens the Nazca slab under the South American continent. This study focuses on the neotectonics of the southern tip of this N-S elongated depression, known as Acequión (from the homonym river that crosses the area), between the Del Agua and Los Pozos rivers. This depression dies out against the transversely oriented Precordillera Sur, which exhibits a similar tectonic style as Precordillera Occidental and Central (east-verging fold-thrust belt). This contribution brings supporting evidence of the ongoing deformation during the Late Pleistocene and Holocene of the triangular zone bounded between the two leading and converging edges of Precordillera Central and Oriental thrust fronts, recorded in a multi-episodic lake sequence of the Acequión and Nikes rivers. The herein gathered evidence comprise Late Pleistocene-Holocene landforms of active thrusting, fault kinematics (micro-tectonic) data and outcrop-scale (meso-tectonic) faulting and folding of recent lake and alluvial sequences. In addition, seismically

  7. Tectonic implications of post-folding Permian magnetizations in the Carapacha Basin, La Pampa province, Argentina

    Science.gov (United States)

    Tomezzoli, Renata N.; Melchor, Ricardo N.; MacDonald, William D.

    2006-10-01

    Paleomagnetic results from Permian clastic and igneous rocks of the Carapacha Basin of the Gondwáides orogenic zone of central Argentina are mainly consistent with results reported previously from the same zone further east, e.g., in the Sierra de la Ventana. Three lithologic entities were analysed: the lower member and upper member of the Carapacha Formation, and an andesite intrusive into the upper member. The directions of their characteristic remanences are similar, differ significantly from the present field direction, and are post-folding. The in situ magnetization directions are moreover consistent with directions expected for late Permian poles of the APWP for South America. The in situ pole for the lower Carapacha Formation is 70°S, 049°E, A95=11° (San Roberto pole); the pole for the upper Carapacha, combined with similar directions from the intrusive, is 64°S, 005°E, A95=5° (Río Curacó pole). These magnetizations imply that the Carapacha Formation, with a minimum age of early Late Permian (about 260 Ma.), was deformed before the end of the Permian. Structural evidence, as well as paleomagnetic, IRM, and AMS experimental results, support the interpretations. The paleogeographic implications of these results are interpreted as a significant counterclockwise movement of Gondwana between the early and the late Permian.

  8. Estacionamiento subterráneo en Buenos Aires República Argentina

    Directory of Open Access Journals (Sweden)

    Editorial, Equipo

    1980-04-01

    Full Text Available The 370 car-stall, 4-level longitudinal type car park was a promotion of the Buenos Aires City Council and was built under Avenida de Córdoba in the Argentinean Capital. The facility is provided with the most sophisticated fire prevention systems, automatic sign systems, vehicle counting equipment to know at any one moment how many are present, public restrooms, locker rooms for the staff, forced ventilation, etc. The structure is formed by a peripheral retention wall, rolled steel columns, and ribbed reinforced concrete slabs in floors and ramps.

    Promovido por la Municipalidad de la ciudad de Buenos Aires se ha construido, en la Avenida de Córdoba de la capital argentina, un estacionamiento de tipo longitudinal con capacidad para 370 plazas, distribuidas en cuatro plantas, dotado de todos los modernos sistemas contra incendios, sistemas automáticos de señalización y contabilización de vehículos en cada momento, aseos públicos, vestuarios para personal, ventilación, etc. La estructura está constituida por muros pantalla perimetrales, pilares de acero laminado y losas aligeradas de hormigón armado en rampas y forjados.

  9. Lichens as possible agents of sandstone deterioration in Jesuitic ruins of San Ignacio Miní (Misiones Province, Argentina

    Directory of Open Access Journals (Sweden)

    Rosato, V. G.

    2010-09-01

    Full Text Available The ruins of San Ignacio Miní, in NE Argentina, Misiones Province, included by the UNESCO in the list of World Heritage in 1984, were built in the 18th century by the Guarani people under the supervision of the Jesuite Congregation. The ruins are located in a tropical weather zone, exposed to extreme conditions of heat and humidity affecting the rocks used in its construction. These rocks are identified as siliceous sandstones, mainly formed by rounded to subrounded clasts, with scarce angulose particles, containing 96% quartz. Weather characteristics encourage the growth of vascular plants as well as algae and mosses and other organisms that damage materials. Among these, there are 18 lichen species (belonging to 18 genera, 8 foliose, 3 fruticose and 7 crustose. The damaging action of these lichens has been observed through SEM observations and EDAX microanalysis of rock samples colonized by Caloplaca sp. and Buellia sp.

    Incluidas en la lista de Patrimonio Mundial por la UNESCO, las ruinas de San Ignacio Miní, en el NE de Argentina, provincia de Misiones, fueron construidas en el siglo XVIII por pobladores guaraníes supervisados por la Compañía de Jesús. Las ruinas se encuentran en una zona de clima tropical, expuestas a condiciones extremas de calor y humedad que alteran a las rocas empleadas en su construcción. Estas rocas se identifican como areniscas silíceas, formadas por clastos redondeados a sub-redondeados, con escasas partículas angulosas, con un contenido de 96,0% cuarzo. Las características del clima favorecen el desarrollo tanto de plantas vasculares como también de musgos, algas y otros organismos capaces de dañar a los materiales. Entre éstos se incluyen 18 especies de líquenes (pertenecientes a 18 géneros, 8 foliosos, 3 fruticosos y 7 crustosos. Las observaciones con SEM y los microanálisis EDE de muestras de roca colonizadas por Caloplaca sp. y Buellia sp sugieren que estos líquenes ejercen una acci

  10. Environmental stable isotope of the 'Sistema de las Encadenadas de Chascomus', Buenos Aires, Argentina

    International Nuclear Information System (INIS)

    The Sistema de las Encadenadas de Chascomus (35o30'S-35o34'S; 58o17'W-58o44'W) lies in the geomorphologic unit called Pampa Deprimida in the Buenos Aires province, Argentina. The Pampa Deprimida has wet climate, with mean annual precipitation about 900 mm, mean annual temperature ranging 13-16 oC and alternating of multiannual dry and humid periods (Iriondo and Drago, 2000). Although rainfall is higher in summer, the precipitation-evaporation balance is negative for this season. This system is located in the Salado River drainage basin, a sedimentary basin where Cretaceous, Tertiary, Plio- Pleistocene and Pleistocene sediments are superimposed over the Precambrian crystalline basement. The Pampeano Plio-Pleistocene sediments contain the aquifer unit and consist in a succession of silt-stones and fine sandstones with a relatively homogeneous mineralogical composition, consisting primarily of plagioclase, quartz and volcanic glass (Teruggi, 1957). Such sediments have generally been regarded as eolic in origin, being derived from volcaniclastic deposits outcropping in the Andes over 1000 km to the west, although localized fluvial and mass movement processes probably redistributed the material to a large extent once accumulated in the Pampas (Kemp and Zarate, 2000). The Sistema de Las Encadenadas de Chascomus is formed by interconnected shallow lakes being the principal ones Vitel (13 km2), Chascomus (30 km2), Manantiales and Adela (21 km2), El Burro (10,7 km2),Chis Chis (14.8 km2), Las Tablillas (16,7 km2) and Las Barrancas (8,85 km2). The Horqueta stream connects the last one, and in fact the whole system, with the Salado River. Pampasic lakes are shallow alkaline systems, with nearly continuous vertical mixing that promotes a high concentration of suspended particulate matter and low water transparency. Water column is almost always thermally homogeneous, saturated with dissolved oxygen and with a high content of dissolved organic matter, mainly humic substances

  11. Incidence and prevalence of lupus in Buenos Aires, Argentina: a 11-year health management organisation-based study

    OpenAIRE

    Scolnik, M; Marin, J.; Valeiras, S M; Marchese, M F; Talani, A S; Avellaneda, N L; Etchepare, A; Etchepare, P; Plou, M S; Soriano, E. R.

    2014-01-01

    Objectives Studies regarding the epidemiology of systemic lupus erythematosus (SLE) are lacking in Argentina. Our purpose was to estimate the incidence and prevalence of SLE in a university hospital-based health management organisation in Buenos Aires (HIMCP). Methods For incidence calculation, the population at risk included all adult members of the HIMCP, with continuous affiliation for at least 1 year from January 1998 to January 2009. Each person was followed until he/she voluntarily left...

  12. The temporal evolution of back-arc magmas from the Auca Mahuida shield volcano (Payenia Volcanic Province, Argentina)

    Science.gov (United States)

    Pallares, Carlos; Quidelleur, Xavier; Gillot, Pierre-Yves; Kluska, Jean-Michel; Tchilinguirian, Paul; Sarda, Philippe

    2016-09-01

    In order to better constrain the temporal volcanic activity of the back-arc context in Payenia Volcanic Province (PVP, Argentina), we present new K-Ar dating, petrographic data, major and trace elements from 23 samples collected on the Auca Mahuida shield volcano. Our new data, coupled with published data, show that this volcano was built from about 1.8 to 1.0 Ma during five volcanic phases, and that Auca Mahuida magmas were extracted from, at least, two slightly different OIB-type mantle sources with a low partial melting rate. The first one, containing more garnet, was located deeper in the mantle, while the second contains more spinel and was thus shallower. The high-MgO basalts (or primitive basalts) and the low-MgO basalts (or evolved basalts), produced from the deeper and shallower lherzolite mantle sources, respectively, are found within each volcanic phase, suggesting that both magmatic reservoirs were sampled during the 1 Myr lifetime of the Auca Mahuida volcano. However, a slight increase of the proportion of low-MgO basalts, as well as of magmas sampled from the shallowest source, can be observed through time. Similar overall petrological characteristics found in the Pleistocene-Holocene basaltic rocks from Los Volcanes and Auca Mahuida volcano suggest that they originated from the same magmatic source. Consequently, it can be proposed that the thermal asthenospheric anomaly is probably still present beneath the PVP. Finally, our data further support the hypothesis that the injection of hot asthenosphere with an OIB mantle source signature, which was triggered by the steepening of the Nazca subducting plate, induced the production of a large volume of lavas within the PVP since 2 Ma.

  13. Estimation of the Serial Interval for Pandemic Influenza (pH1N1) in the Most Southern Province of Argentina

    OpenAIRE

    PW Orellano; JI Reynoso; Grassi, A; A. Palmieri; Uez, O; Carlino, O

    2012-01-01

    Background: A retrospective cohort study, in the context of household transmission, to estimate the serial interval (SI) of pH1N1 influenza in the island of Tierra del Fuego was carried out. Methods: We collected data from the epidemiological surveillance system during disease outbreak in Ushuaia and Rio Grande, the two main cities of the southernmost province of Argentina. Only the records of patients and households with a positive result of RT-PCR assay for pH1N1 virus were used. Results: A...

  14. Ecotoxicological and Genotoxic Evaluation of Buenos Aires City (Argentina Hospital Wastewater

    Directory of Open Access Journals (Sweden)

    Anahí Magdaleno

    2014-01-01

    Full Text Available Hospital wastewater (HWW constitutes a potential risk to the ecosystems and human health due to the presence of toxic and genotoxic chemical compounds. In the present work we investigated toxicity and genotoxicity of wastewaters from the public hospital of Buenos Aires (Argentina. The effluent from the sewage treatment plant (STP serving around 10 million inhabitants was also evaluated. The study was carried out between April and September 2012. Toxicity and genotoxicity assessment was performed using the green algae Pseudokirchneriella subcapitata and the Allium cepa test, respectively. Toxicity assay showed that 55% of the samples were toxic to the algae (%I of growth between 23.9 and 54.8. The A. cepa test showed that 40% of the samples were genotoxic. The analysis of chromosome aberrations (CA and micronucleus (MN showed no significant differences between days and significant differences between months. The sample from the STP was not genotoxic to A. cepa but toxic to the algae (%I = 41%, showing that sewage treatment was not totally effective. This study highlights the need for environmental control programs and the establishment of advanced and effective effluent treatment plants in the hospitals, which are merely dumping the wastewaters in the municipal sewerage system.

  15. Calidad y aprovechamiento del agua de la Laguna Unamuno (Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Vanesa Yael Bohn

    2004-01-01

    Full Text Available Una de las características más destacadas de la geomorfología de la provincia de Buenos Aires es la presencia de un número muy grande de lagunas, de tamaños y formas diversas, con una distribución aparentemente caótica. Muchas de ellas han ocupado tierras potencialmente productivas. La laguna Unamuno se halla localizada en la cuenca del arroyo Napostá Chico (1320 km2, en la región pampeana argentina. El objetivo del trabajo es el estudio de la calidad del agua de la laguna y el análisis de las posibilidades de aprovechamiento del recurso hídrico. Se recopilaron datos edafológicos y meteorológicos, se midieron parámetros físicos y se analizaron muestras de agua en superfi cie y profundidad. La calidad del agua es evaluada desde las perspectivas biológica, química y física.

  16. [Recent history: 12th International Conference on Cancer, Buenos Aires, Argentina, 1978].

    Science.gov (United States)

    Spinelli, Hugo

    2014-04-01

    Using the approaches of history of the present, this article recovers the discussions surrounding the 12th International Conference on Cancer carried out in Buenos Aires in 1978, in reaction to which Georges Périès organized a "counter-conference" in Paris. In order to understand this discussion, the political situation of the time is described, as is the state of human rights at the time in Argentina, the role of the media - in particular the newspapers La Nación and Clarín and the magazine Gente - and the institutional position adopted by the National Academy of Medicine, as expressed in a letter sent to the presidents of the primary scientific societies of the world. The letter is reprinted in this text as a documentary source, taken from Memoria: Año 1978 (Presidencia de Dr. José E. Rivarola) [Acta: Year 1978 (Presidency of Dr. José E. Rivarola)]. The framework of the discussion makes reference to science's social policy versus science's supposed neutrality and the role of scientific societies. PMID:24823605

  17. Fronteras en el ciberespacio: el nuevo mapa mundial visto desde Buenos Aires (Argentina

    Directory of Open Access Journals (Sweden)

    Gustavo D. Buzal

    2014-01-01

    Full Text Available Internet, la red de redes, fue creada bajo una perspectiva de descentralización. Sin embargo, su desarrollo material presenta un espacio altamente jerarquizado. A través de la aplicación de procedimientos del análisis espacial, se plasmó en una cartografía el nuevo mapa mundial del ciberespacio, visto desde Buenos Aires (Argentina. Un espacio apto para la realización de nuevas exploraciones, pero que también presenta posibilidades geopolíticas. En el artículo se verifica el surgimiento de nuevas fronteras, derivadas del acceso a la red, entre los países centrales y periféricos; hecho que amplía la fragmentación en la conexión de los países de América Latina. Revertir esta situación es un desafío a futuro.

  18. Fronteras en el ciberespacio: el nuevo mapa mundial visto desde Buenos Aires (Argentina

    Directory of Open Access Journals (Sweden)

    Gustavo D. Buzai

    2014-05-01

    Full Text Available Internet, la red de redes, fue creada bajo una perspectiva de descentralización. Sin embargo, su desarrollo material presenta un espacio altamente jerarquizado. A través de la aplicación de procedimientos del análisis espacial, se plasmó en una cartografía el nuevo mapa mundial del ciberespacio, visto desde Buenos Aires (Argentina. Un espacio apto para la realización de nuevas exploraciones, pero que también presenta posibilidades geopolíticas. En el artículo se verifica el surgimiento de nuevas fronteras, derivadas del acceso a la red, entre los países centrales y periféricos; hecho que amplía la fragmentación en la conexión de los países de América Latina. Revertir esta situación es un desafío a futuro.

  19. [Recent history: 12th International Conference on Cancer, Buenos Aires, Argentina, 1978].

    Science.gov (United States)

    Spinelli, Hugo

    2014-04-01

    Using the approaches of history of the present, this article recovers the discussions surrounding the 12th International Conference on Cancer carried out in Buenos Aires in 1978, in reaction to which Georges Périès organized a "counter-conference" in Paris. In order to understand this discussion, the political situation of the time is described, as is the state of human rights at the time in Argentina, the role of the media - in particular the newspapers La Nación and Clarín and the magazine Gente - and the institutional position adopted by the National Academy of Medicine, as expressed in a letter sent to the presidents of the primary scientific societies of the world. The letter is reprinted in this text as a documentary source, taken from Memoria: Año 1978 (Presidencia de Dr. José E. Rivarola) [Acta: Year 1978 (Presidency of Dr. José E. Rivarola)]. The framework of the discussion makes reference to science's social policy versus science's supposed neutrality and the role of scientific societies.

  20. Historia reciente: XII Congreso Internacional del Cáncer, Buenos Aires, Argentina, 1978

    Directory of Open Access Journals (Sweden)

    Hugo Spinelli

    2014-01-01

    Full Text Available Desde los enfoques de la historia del tiempo presente, este artículo recupera la discusión en torno al XII Congreso Internacional del Cáncer realizado en Buenos Aires en 1978, que provocó la realización en París de un “contracongreso” por iniciativa de Georges Périès. Para ello se describe el escenario político de la época, la situación de los derechos humanos en Argentina, el rol de los medios de comunicación, en especial los periódicos La Nación y Clarín y la revista Gente, y la posición institucional adoptada por la Academia Nacional de Medicina, plasmada en una carta enviada a los presiden- tes de las principales sociedades científicas del mundo, que se reproduce como fuente documental, tomada del libro Memoria: Año 1978 (Presidencia de Dr. José E. Rivarola. El marco de la discusión remite a la política social de la ciencia versus su presunta neu- tralidad y el rol de las sociedades científicas.

  1. Social determinants of nonadherence to tuberculosis treatment in Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Maria Belen Herrero

    2015-09-01

    Full Text Available This study aimed to identify the individual and environmental determinants of nonadherence to tuberculosis (TB treatment in selected districts in the Buenos Aires Metropolitan Area, in Argentina. We conducted a cross-sectional study using a hierarchical model. Using primary and secondary data, logistic regression was performed to analyze two types of determinants. The likelihood of nonadherence to treatment was greatest among male patients. The following factors led to a greater likelihood of nonadherence to treatment: patients living in a home without running water; head of household without medical insurance; need to use more than one means of transport to reach the health center; place of residence in an area with a high proportion of households connected to the natural gas network; place of residence in an area where a large proportion of families fall below the minimum threshold of subsistence capacity; place of residence in an area where a high proportion of households do not have flushing toilets and basic sanitation. Our results show that social and economic factors – related to both individual and environmental characteristics – influence adherence to TB treatment.

  2. Ecotoxicological and genotoxic evaluation of Buenos Aires city (Argentina) hospital wastewater.

    Science.gov (United States)

    Magdaleno, Anahí; Juárez, Angela Beatriz; Dragani, Valeria; Saenz, Magalí Elizabeth; Paz, Marta; Moretton, Juan

    2014-01-01

    Hospital wastewater (HWW) constitutes a potential risk to the ecosystems and human health due to the presence of toxic and genotoxic chemical compounds. In the present work we investigated toxicity and genotoxicity of wastewaters from the public hospital of Buenos Aires (Argentina). The effluent from the sewage treatment plant (STP) serving around 10 million inhabitants was also evaluated. The study was carried out between April and September 2012. Toxicity and genotoxicity assessment was performed using the green algae Pseudokirchneriella subcapitata and the Allium cepa test, respectively. Toxicity assay showed that 55% of the samples were toxic to the algae (%I of growth between 23.9 and 54.8). The A. cepa test showed that 40% of the samples were genotoxic. The analysis of chromosome aberrations (CA) and micronucleus (MN) showed no significant differences between days and significant differences between months. The sample from the STP was not genotoxic to A. cepa but toxic to the algae (%I = 41%), showing that sewage treatment was not totally effective. This study highlights the need for environmental control programs and the establishment of advanced and effective effluent treatment plants in the hospitals, which are merely dumping the wastewaters in the municipal sewerage system. PMID:25214834

  3. BIOMASA EN PLANTACIONES DE Eucalyptus viminalis Labill. DE LA PROVINCIA DE BUENOS AIRES, ARGENTINA

    Directory of Open Access Journals (Sweden)

    Paula Ferrere

    2008-01-01

    Full Text Available El presente trabajo se desarrolló en el oeste de la provincia de Buenos Aires, Argentina con el objetivo de ajustar funciones de biomasa de árboles individuales y determinar la biomasa en diferentes compartimientos de la planta y el sotobosque. Se identificaron rodales de Eucalyptus viminalis Labill. cuyas edades oscilaron entre 4 y 14 años. Se apearon 21 árboles con diámetros entre 9,2 y 32,5 cm. Se desarrollaron regresiones simples y múltiples y se estimó el volumen, la biomasa en ramas, hojas y fuste. Las ecuaciones de volumen de mejor comportamiento son basadas en modelos lineales en su forma normal, y el modelo más adecuado fue el que incorporó al d2 (R2 = 0,92. Para la estimación de la biomasa en hojas, ramas, copa y fuste se recomienda los modelos ln-ln que consideran el d y h o solo el d. El componente de la biomasa en hojas presentó una estimación más débil. La distribución de la biomasa en los individuos sigue el patrón de desarrollo que se encuentra en la bibliografía. La proporción de la biomasa en la copa disminuye con la edad, contrariamente a lo sucedido con el fuste.

  4. Well site conditions associated with nitrate contamination in a multilayer semiconfined aquifer of Buenos Aires, Argentina

    Science.gov (United States)

    Carbó, L. I.; Flores, M. C.; Herrero, M. A.

    2009-06-01

    A stepwise logistic regression (LR) model was generated to evaluate the association between contamination of groundwater by nitrates with several risk factors such as soil types, farm facilities and practises, and well characteristics. The odds ratio was calculated to estimate the degree of impact that the associated variables had on the risk of contamination in a semiconfined multilayer aquifer underlying rural areas of Buenos Aires, Argentina. Duplicate farm groundwater samples ( n = 160) were taken and nitrate was analyzed. Data, involving various farm factors, was gathered via two questionnaires concerning farm’s general and productive aspects, and well characteristics. Statistical tests were run between nitrates and each variable present in the survey. A 96.25% of the samples presented detectable nitrate levels, 40.91% of which had more than 45 ppm nitrates. The final LR model involved five of the variables under study: well age, soil permeability, depth of water table, location, and distance from well to contamination sources. Cross validation proved to be a good estimator of nitrate water contamination. Suspicions about how these characteristics influence groundwater contamination by nitrates were confirmed, and as these five factors represent a higher risk for this type of aquifer, their proper management may contribute to a better resource protection.

  5. Infection levels of the cestode Hymenolepis diminuta in rat populations from Buenos Aires, Argentina.

    Science.gov (United States)

    Hancke, D; Suárez, O V

    2016-03-01

    Ecological studies on zoonotic parasites are crucial for the design and implementation of effective measures to prevent parasite transmission. The aim of this study was to evaluate factors such as season, landscape unit, rat sex and rat body length, affecting the abundance of the cestode Hymenolepis diminuta, a parasite of synanthropic rats, within an urban environment. A parasitological survey was undertaken on 169 rats from landscape units such as shantytowns, parklands, industrial-residential areas and scrap-metal yards in Buenos Aires, Argentina. The overall prevalence of H. diminuta was 21.3%, although the occurrence of this species in rats was not homogeneous. The abundance of H. diminuta, using a zero-inflated negative binomial model, was correlated with rat body length. In shantytowns, abundance levels were higher than other landscape units, largely due to differences in individual environmental characteristics and rat assemblages. The populations of arthropod intermediate hosts could be subjected to seasonal fluctuations and the degree of urbanization. Shantytowns are overcrowded urban marginal settlements with most inhabitants living in precarious conditions and supporting large populations of rats, thereby increasing the risk of zoonotic infection. PMID:25869333

  6. Arthropod and filarioid parasites associated with wild rodents in the northeast marshes of Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Marcela Lareschi

    2003-07-01

    Full Text Available During 1995, 16 species of arthropods and 2 species of filarioids, totaling 1 287 specimens were collected from 64 wild rodents captured in the Hudson Natural Reserve, Buenos Aires, Argentina. Infestation parameters and indexes were analyzed. Host specific richness was S = 6, diversity H = 1.48, and relative density RDI = 40%. High values of parasite species richness and diversity were found on Oligoryzomys delticola (S = 9; H = 1.40, Oxymycterus rufus (S = 9; H = 1.37, and Oligoryzomys flavescens (S = 9; H = 1.28, followed by Scapteromys aquaticus (S = 6; H = 0.17, and Akodon azarae (S = 4; H = 1.20. Deltamys kempi was infested only by Androlaelaps rotundus. O. delticola and O. flavescens showed the highest similarity index (O = 74.19%, followed by O. flavescens with S. aquaticus, as a result of historical processes and shared microhabitats. Considering arthropods-filarioids associations, significant affinity was observed in Litomosoides bonaerensis with Hoplopleura travassosi, Laelaps paulistanensis, and Gigantolaelaps wolffsohni.

  7. Bioacustical and etho-ecological features in amphibian communities of Southern Cordoba province (Argentina

    Directory of Open Access Journals (Sweden)

    Salas, Nancy E.

    1998-01-01

    standardized monitoring practices. In the present work, the most important etho-ecological differences (reproduction habitat, call site, daily and seasonal activity of species that constitute the communities of southern Cordoba Province are indicated, and a classification of advertisement calls is provided. The anuran fauna of the plain area of the southern-central Córdoba Province is represented by 9 species of leptodactylids belonging to 5 genera (Leptodactylus gracilis, L. mystacinus, L. latinasus latinasus, L. ocellatus, Pleurodema tucumanum, Physalaemus biligonigerus, Odontophlynus americanus, Ceratophrys cranwelli and C. ornata, 2 species of bufonids (Bufo arenarum and B. fernandezae and one hylid (Hyla pulchella pulchella. The acoustic records obtained in the field during the reproductive period were analyzed through a program of sound digital analysis comparing the following parameters: dominant frequency, call duration and interval between calls; descriptions regarding type of call and modulation were also made. Three types of basic calls were recognized based on duration; this category was sub-divided depending on the shape of the oscillographic image. Results of this analysis revea] marked differences between advertisement calls, mainly at the level of dominant frequency ranges and call duration. This partition of sound space represents a mechanism of mating isolation that minimizes the interaction between sympatric species that breed at the same time.

  8. A unifying study of phenotypic and molecular genetic variability in natural populations of Anadenanthera colubrina var. cebil from Yungas and Paranaense biogeographic provinces in Argentina

    Indian Academy of Sciences (India)

    María Victoria García; Kathleen Prinz; María Eugenia Barrandeguy; Marcos Miretti; Reiner Finkeldey

    2014-04-01

    Anadenanthera colubrina var. cebil is a discontinuously distributed native tree species in South American subtropical forests. Thirteen quantitative traits and eight nuclear microsatellite loci were examined in individuals from two biogeographic provinces of Argentina to determine the number and composition of genetically distinguishable groups of individuals and explore possible spatial patterns of the phenotypic and genetic variability. Means of reproductive traits were higher in the Yungas than in the Paranaense biogeographic province, whereas five out of eight nonreproductive quantitative traits showed higher mean values in the latter. Variance coefficients were moderate, and there were significant differences between and within provinces. Three clusters were defined based on spatial model for cluster membership for quantitative traits. One cluster grouped the individuals from the Paranaense biogeographic province whereas the individuals from the Yungas biogeographic province grouped regarding its population of origin. Parameters of molecular genetic variability showed higher values in the Yungas than in the Paranaense biogeographic province. Observed heterozygosity was lower than expected heterozygosity in both biogeographic provinces, indicating an excess of homozygosity. The homozygosity test by Watterson and the exact test by Slatkin suggested diversifying selection for locus Ac41.1. Bayesian clustering spatial model for microsatellites loci data were performed for both all loci and for all loci excluding locus Ac41.1. In both analyses two clusters were inferred. Analysis of molecular variance revealed similar results for all genotypes and for all genotypes defined excluding locus Ac41.1. Most of the total variance is attributable to genetic variation within clusters. The presence of homogeneous clusters was detected for both the phenotypic and molecular genetic variability. Two Bayesian clustering analyses were performed according to molecular genetic data

  9. Potencial uso agrícola del agua de la laguna Unamuno. Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    V. Bohn

    2007-01-01

    Full Text Available La laguna Unamuno se localiza en el sudoeste de la provincia de Buenos Aires (Argentina y pertenece a la cuenca del arroyo Napostá Chico. Su origen se relaciona con la topografía y con el incremento de las precipitaciones promedio de la región durante las últimas décadas. Debido a que no existen experiencias de riego con agua de la laguna, el objetivo de este trabajo es determinar su aptitud para riego y el riesgo de sodificación del suelo de la cubeta de inundación. El grado de dicho riesgo es un aporte al conocimiento del estado actual de los suelos de la cubeta de inundación y es un parámetro a tener en cuenta en futuros planes de manejo para el uso de la laguna en suelos aledaños. Los parámetros físicos y químicos del agua se obtuvieron a partir del análisis de muestras correspondientes al período abril/04-junio/05. Se aplicó el índice de absorción de sodio y el de carbonato sódico residual. Se determinó que existe un alto riesgo de sodificación de los suelos que están en contacto con el agua de la laguna. Sin embargo, la permanencia de los mismos y la variación areal de la laguna contrarrestaron los efectos de la permanencia de agua con alto contenido de sodio(Na, cloro y sulfatos sobre tierras productivas.

  10. Diatomeas (Bacillariophyceae de Ambientes Acuáticos de Altura de la Provincia de Catamarca, Argentina II Diatoms (Bacillariophyceae from high altitude aquatic environments of Catamarca Province in Argentina. II

    Directory of Open Access Journals (Sweden)

    Nora I. Maidana

    2006-07-01

    Full Text Available En esta contribución al conocimiento de las diatomeas de humedales de altura, se analizaron 14 muestras pertenecientes a distintos cuerpos de agua de la Provincia de Catamarca (Argentina, entre los 2420 y 4240 m s. n. m. Se identificaron 208 taxones infragenéricos de los cuales 90 son nuevas citas para la Provincia de Catamarca. Se mencionan por primera vez para Argentina los géneros: Frankophila y Microcostatus y las especies: Achnanthes thermalis var. rumrichorum Lange-Bertalot; Amphora mira Krasske; Brachysira atacamae Hustedt; Frankophila similioides Lange-Bertalot & Rumrich; Gomphonema punae Lange-Bertalot & Rumrich; Haloroundia speciosa Diaz & Maidana; Luticola mollis Lange-Bertalot& Rumrich; Mastogloia atacamae Hustedt; Microcostatus andinus Lange-Bertalot & Rumrich; Navicula atacamana Patrick; Navicula parinacota Rumrich & Lange-Bertalot; Planothidium chilense (Hustedt Lange-Bertalot; Staurosira pseudoconstruens (Marciniak Lange-Bertalot; Surirella chilensis var constricta Hustedt y Surirella wetzellii Hustedt. Además se propone una nueva combinación: Ulnaria ulna var. constricta.In this research focusing the diatoms of high topographic wetlands, 14 samples of different freshwater bodies (between 2,420 and 4,240 m a. s. l. were studied. Two hundred and eight infrageneric taxa were identified, 90 of them are new records for the Catamarca province. The genera: Frankophila and Microcostatus and the species Achnanthes thermalis var. rumrichorum Lange-Bertalot; Amphora mira Krasske; Brachysira atacamae Hustedt; Frankophila similioides Lange-Bertalot & Rumrich; Gomphonema punae Lange-Bertalot & Rumrich; Haloroundia speciosa Diaz & Maidana; Luticola mollis Lange-Bertalot & Rumrich; Mastogloia atacamae Hustedt; Microcostatus andinus Lange-Bertalot& Rumrich; Navicula atacamana Patrick; Navicula parinacota Rumrich & Lange-Bertalot; Planothidium chilense (Hustedt Lange-Bertalot; Staurosira pseudoconstruens (Marciniak Lange-Bertalot; Surirella

  11. 21Pb dating of sediments in a heavily contaminated drainage channel to the La Plata estuary in Buenos Aires, Argentina

    International Nuclear Information System (INIS)

    Concentrations of 21Pb and 137Cs in sediment samples collected from two cores at a drainage channel to the La Plata river estuary in Buenos Aires, Argentina, were measured using ultralow-background detection systems. The 21Pb data were used to determine the rate of sediment accumulation of the sites. These results were correlated with some heavy metal (chromium and lead) concentrations of the samples in an attempt to characterize the historical input of contaminants due to the industrial development, which has taken place in this area over the last century. The 137Cs measurements demonstrate that cesium dating is not adequate in regions of the southern hemisphere

  12. Control of Aedes aegypti with temephos in a Buenos Aires cemetery, Argentina Control de Aedes aegypti con temefós en un cementerio de Buenos Aires, Argentina Controle de Aedes aegypti com temefós em cemitério de Buenos Aires, Argentina

    OpenAIRE

    Darío Vezzani; Stella Maris Velázquez; Nicolás Schweigmann

    2004-01-01

    The efficacy of a larvicide, temephos, for controlling Ae. aegypti was evaluated in a cemetery in Buenos Aires, Argentina. Breeding sites decreased from 18.4% in the first study period (Nov 1998 to May 1999, without temephos) to 2.2% in the second period (Nov 1999 to May 2000, two applications), and to 0.05% in the third one (Nov 2000 to May 2001, five applications). Ovitraps with eggs decreased from 17% in the first period to 5.8% in the second period, and to 2.9% in the third one. Results s...

  13. Distribution study of Chlamydia trachomatis genotypes in symptomatic patients in Buenos Aires, Argentina: association between genotype E and neonatal conjunctivitis

    Directory of Open Access Journals (Sweden)

    Corominas Ana I

    2010-02-01

    Full Text Available Abstract Background Chlamydia trachomatis infections are the most prevalent sexually transmitted bacterial infections in the world. There is scarce data available referring to the distribution of C. trachomatis genotypes in Argentina. The aim of this study was to identify the genotypes of C. trachomatis circulating in the metropolitan area of Buenos Aires (Argentina associated with ophthalmia neonatorum and genital infections. Findings From 2001 to 2006, 199 positive samples for C. trachomatis infection from symptomatic adult patients and neonates with ophthalmia neonatorum from two public hospitals were studied. C. trachomatis genotypes were determined by PCR-RFLP of an ompA fragment. Genotype E was the most prevalent regardless of the sample origin (46.3% 57/123 in adults and 72.4% 55/76 in neonates, followed by genotype D (19.5% 24/123 and F (14.6% 18/123 in adults, and G (9.2% 7/76 and D (7.9% 6/76 in neonates. We detected a significantly higher frequency of genotype E (p ophthalmia neonatorum than in genital specimens. Genotype D was associated with genital localization (p Conclusion We found a particularly increased frequency of C. trachomatis genotype E in neonatal conjunctivitis, which may indicate an epidemiological association between this genotype and the newborn population. The present study also contributed to increase the knowledge on genotype distribution of Chlamydia trachomatis in symptomatic adult patients in Buenos Aires, Argentina, in which genotypes E, D and F were the predominant ones.

  14. "We talk of AIDS because we love life": a stakeholder assessment of HIV/AIDS organizations in Buenos Aires, Argentina.

    Science.gov (United States)

    Spaulding, Alicen B; Brieger, William R

    This stakeholder assessment of HIV/AIDS service providing institutions in Argentina offers insights into the HIV/AIDS crisis in Spanish-speaking Latin America from an institutional level and makes recommendations for strengthening the work and functioning of these institutions. This stakeholder assessment was conducted to determine how HIV/AIDS prevention and management in Argentina affects and is affected by relevant HIV/AIDS institutions. Semi-structured qualitative interviews were conducted with 13 key leaders of organizations working in HIV/AIDS prevention in Buenos Aires including non-governmental, governmental, and academic institutions. Analyses of interviewee comments are presented according to four major themes: network connections, program resources, perceptions of success, and challenges. Key findings include the need for strengthening formal networks, increasing the involvement of other non-AIDS related social institutions in promoting HIV prevention, finding more sustainable funding options, working more effectively with the public sector to create policies and regulations favorable to the HIV/AIDS field, and addressing the lack of perceived susceptibility to HIV/AIDS in Argentine culture. From leaders' comments, recommendations are made for strengthening the HIV/AIDS network among key institutions including adapting the UNAIDS "Three Ones" principal to create one crosssector office responsible for coordinating HIV/AIDS work, formalizing agreements with institutions outside of Buenos Aires, increasing the role of schools in HIV/AIDS awareness, and designing programs that address lack of perceived susceptibility to HIV/AIDS among Argentines. PMID:18573753

  15. Control of Aedes aegypti with temephos in a Buenos Aires cemetery, Argentina Control de Aedes aegypti con temefós en un cementerio de Buenos Aires, Argentina Controle de Aedes aegypti com temefós em cemitério de Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Darío Vezzani

    2004-10-01

    Full Text Available The efficacy of a larvicide, temephos, for controlling Ae. aegypti was evaluated in a cemetery in Buenos Aires, Argentina. Breeding sites decreased from 18.4% in the first study period (Nov 1998 to May 1999, without temephos to 2.2% in the second period (Nov 1999 to May 2000, two applications, and to 0.05% in the third one (Nov 2000 to May 2001, five applications. Ovitraps with eggs decreased from 17% in the first period to 5.8% in the second period, and to 2.9% in the third one. Results suggest that, in Buenos Aires, Ae. aegypti populations are highly susceptible to temephos. It is recommended to limit the use of temephos to prevent potential epidemics rather than for routine control.Se evaluó la eficacia de un larvicida, temefós, para controlar Ae. aegypti en un cementerio de Buenos Aires, Argentina. Los criaderos descendieron de 18,4% en el primer periodo de estudio (Nov 1998 a May 1999, sin temefos a 2,2% en el segundo (Nov 1999 a May 2000, dos aplicaciones, y a 0,05% en el tercero (Nov 2000 a May 2001, cinco aplicaciones. Las ovitrampas con huevos disminuyeron de 17% en el primer periodo a 5,8% en el segundo, y a 2,9% en el tercero. Los resultados sugieren que, en Buenos Aires, las poblaciones de Ae. aegypti son altamente susceptibles al temefós. Es recomendable limitar su uso para prevenir eventuales epidemias y no para el control rutinario.Avaliou-se a eficácia de um larvicida, temefós, para controlar Ae. aegypti em um cemitério de Buenos Aires, Argentina. Os criadouros reduziram de 18,4% no primeiro período de estudo (nov de 1998 a maio de 1999, sem temefós para 2,2% no segundo (nov de 1999 a maio de 2000, duas aplicações, e para 0,05% no terceiro (nov de 2000 a maio de 2001, cinco aplicações. As. ovitrampas com ovos diminuíram de 17% no primeiro período para 5,8% no segundo e para 2,9% no terceiro. Os resultados sugerem que, em Buenos Aires, as populações de Ae. aegypti são altamente susceptíveis ao temefós.

  16. Microstructural analysis and P T conditions of the Azul megashear zone, Tandilia, Buenos Aires province, Argentina

    Science.gov (United States)

    Frisicale, M. C.; Martinez, F. J.; Dimieri, L. V.; Dristas, J. A.

    2005-09-01

    A microstructural analysis was carried out on mylonitic rocks of the Azul megashear zone (AMSZ), Tandilia, which were formed in a range of metamorphic conditions from lower greenschist to amphibolite facies. Tailed porphyroclasts are common and mostly symmetric. Scarce asymmetric rotated porphyroclasts show both sinistral and dextral senses of shear. In sections parallel to the mylonitic foliation, porphyroclasts are round. The AMSZ is probably related to the late Transamazonian orogenic cycle and may be due to NNE-SSW-directed convergence. In weakly deformed protolith and protomylonites, quartz deforms by dynamic recrystallization, mainly subgrain rotation in dislocation creep Regime 2. K-feldspar porphyroclasts and plagioclase show scarce fracturation and deform by dynamic recrystallization along grain boundaries. Quartz microstructures in mylonites indicate predominantly Regime 3 grain boundary migration recrystallization. Feldspar structures indicate recrystallization through the nucleation and growth of new grains at grain boundaries. The temperatures of deformation from mineral assemblages in the CNKFMASH system in four bulk compositions are in the range of 400-450 °C, and the pressures are more than 6 kb.

  17. Abnormalities in amphibian populations inhabiting agroecosystems in Northeastern Buenos Aires Province, Argentina.

    Science.gov (United States)

    Agostini, M G; Kacoliris, F; Demetrio, P; Natale, G S; Bonetto, C; Ronco, A E

    2013-05-27

    The occurrence of abnormalities in amphibians has been reported in many populations, and its increase could be related to environmental pollution and habitat degradation. We evaluated the type and prevalence of abnormalities in 5 amphibian populations from agroecosystems with different degrees of agricultural disturbance (cultivated and reference areas). We detected 9 types of abnormalities, of which the most frequent were those occurring in limbs. The observed prevalence of abnormality in assessed populations from cultivated and reference areas was as follows: Rhinella fernandezae (37.1 and 10.2%, respectively), Leptodactylus latrans adults (28.1 and 9.2%) and juveniles (32.9 and 15.3%), and Hypsiboas pulchellus (11.6 and 2.8%). Scinax granulatus populations did not show abnormalities. Pseudis minuta, which was only detected in the reference area, exhibited a prevalence of 13.3%. For R. fernandezae, L. latrans, and H. pulchellus, generalized linear mixed models showed that prevalence of abnormalities was significantly higher (p ponds of the cultivated area, no data are currently available on how other factors, such as injuries from predators and parasite infections, vary by land use. Further research will be necessary to evaluate possible causes of abnormalities detected in the present study mainly in the context of factor interactions. PMID:23709469

  18. Variation in external morphology of resident bottlenose dolphins (Tursiops truncatus) in Bahia San Antonio, Patagonia, Argentina.

    OpenAIRE

    Vermeulen, Els; Cammareri, Alejandro

    2010-01-01

    Two geographic variations of bottlenose dolphins were described in Argentina (Bastida & Rodriguez, 2003); bottlenose dolphins characterized by their triangular dorsal fin shape (coast of the province of Buenos Aires), and bottlenose dolphins characterized by their falcate dorsal fin shape (coast of the province of Chubut). It was stated that `their clear difference would indicate that both geographic forms are isolated¿ (Bastida & Rodriguez, 2003 p.137). A photo-identification study carrie...

  19. Programas de salud sexual y reproductiva y maternidad adolescente en La Plata (Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Susana Ortale

    2009-12-01

    brings into focus the contrast between the normative framework and the meaning motherhood assumes for adolescents. For this purpose, we analyze national health programs, of Buenos Aires province and the municipality of La Plata as well as speeches made in interviews to twenty teens in poor neighborhoods of the city of La Plata. The analysis of the program explores the incorporation of gender and political interpretation of the problems of sexuality and reproduction of adolescents in the context of human rights and the opinions of the informants explores the interpellation.

  20. La mortalidad por armas de fuego en Argentina entre 1990 y 2008 Firearm mortality in Argentina, 1990-2008

    Directory of Open Access Journals (Sweden)

    Marina Gabriela Zunino

    2012-04-01

    Full Text Available Este es un estudio epidemiológico descriptivo de la mortalidad por armas de fuego en Argentina, 1990-2008. Se analizaron los porcentajes y las tasas de mortalidad por armas de fuego entre las jurisdicciones del país. Los datos provienen de la Dirección de Estadística e Información en Salud, Ministerio de Salud y Ambiente, República Argentina. Entre 1990-2008 se produjeron 358.484 muertes por causas externas de las cuales el 16,6% (59.339 correspondieron a armas de fuego. La Provincia de Buenos Aires presentó el porcentaje y tasas cruda y ajustada superiores. Las jurisdicciones de la Región Pampeana (incluye Provincia de Buenos Aires presentaron un perfil más homogéneo y similar al del país: aumento de las tasas en 1999-2002 y disminución en 2003-2006. Estos hallazgos se explicarían en parte por el deterioro socioeconómico vivido en Argentina a fines del siglo XX, que habría tenido mayor impacto en Provincia de Buenos Aires, por ser ésta una de las provincias con mayor desarrollo y dinamismo económico de Argentina. La situación de Provincia de Buenos Aires habría estado agravada por el hecho de tener una de las fuerzas policiales más represivas del país.This is a descriptive epidemiological study of firearm mortality in Argentina, 1990-2008. The study compared the firearm mortality percentages and rates between the country's jurisdictions. The data are from the Office of Health Statistics and Information, Ministry of Health. From 1990 to 2008 there were 358,484 deaths from external causes, of which 16.6% (59,339 were caused by firearms. The Province of Buenos Aires showed the highest percentage and crude and adjusted rates. The jurisdictions in the Pampeana region (including the Province of Buenos Aires showed a more homogeneous profile, similar to that of the country as a whole, with an increase in the rates from 1999 to 2002 and a decrease from 2003 to 2006. These findings are partially explained by the country

  1. Reptiles escamosos (Squamata) del Pleistoceno Medio del Norte de la ciudad de Mar del Plata (provincia de Buenos Aires, Argentina)

    OpenAIRE

    Santiago Brizuela; Marcos M. Cenizo; Daniel A. Tassara

    2015-01-01

    In this study, we describe two fossil remains of squamate reptiles found in Middle Pleistocene outcrops at the northern marine cliffs of the city of Mar del Plata (Buenos Aires province). The specimens were found forming a taphocenosis with remains of other microvertebrates (amphibians, mammals and birds). The reptiles recognized in the association are represented by remains of an undetermined colubrid, and the anguid Ophiodes sp. This latter finding represents the first fossil record for th...

  2. Reading for All; Proceedings of the IRA (International Reading Association) World Congress on Reading (4th, Buenos Aires, Argentina, August 3-5, 1972).

    Science.gov (United States)

    Karlin, Robert, Ed.

    This book contains papers presented at the Fourth International Reading Association World Congress on Reading in Buenos Aires, Argentina, in August 1972. The contents of the book are divided into three parts: "Literacy and Literature" includes papers on libraries, books, and reading by Jorge Borges, the future of reading by Theodore Harris, the…

  3. "Quien Sabe Mas Lucha Mejor": Adult Educators' Care of the Self Practices within Social Movements in Buenos Aires, Argentina

    Science.gov (United States)

    O'Donnell, Jennifer Lee

    2014-01-01

    This article looks at popular adult educators' care of the self practices within social movements in Buenos Aires, Argentina. It answers the following questions: How is popular adult education practiced amongst educators in social movements? What can studying popular adult educators' care of the self practices offer the field of adult…

  4. Study on Child Abuse in Children and Adolescents in the Province of Buenos Aires:

    OpenAIRE

    Cuenya, Lucas; Sánchez, Norma Inés

    2011-01-01

    The principal aim of this study was to provide a current description of the child and teenager maltreatment phenomenon in the Buenos Aires Province. The sample was composed by 5341 cases of children and teenagers from 0 to 20 years old, whose were treated in 2010 for having been victims of maltreatment. Physical maltreatment was the most frequent one. The girls presented major proportion of sexual abuse, whereas boys registered major proportions of negligence, physical maltreatment and desert...

  5. In situ monitoring of urban air in Córdoba, Argentina using the Tradescantia-micronucleus (Trad-MCN) bioassay

    Science.gov (United States)

    Carreras, H. A.; Pignata, M. L.; Saldiva, P. H. N.

    During the last decades, a significant deterioration of ambient air quality has been observed in Argentina. However, the availability of air pollution monitoring stations is still limited to only few cities. In this study, we investigated the genotoxicity of ambient levels of air pollution in Córdoba using the Tradescantia micronucleus assay. The experiment was performed from October, 2004 to April 2005. Pots with Tradescantia pallida were placed in three sites: Córdoba city center, characterized by important avenues with high traffic activity (cars, taxis, and public transport vehicles); the university campus, along a side road with heavy traffic of gasoline and diesel powered vehicles, buses and trucks; and a residential area, with no significant local sources of air pollution. Twenty young T. pallida inflorescences were collected from each sampling site in November, February and April. Micronuclei frequencies were determined in early tetrads of pollen mother cells and expressed as MCN/100 tetrads. Simultaneously, the environmental levels of total suspended particles (24 h mean) were determined for each site. A significant difference in micronuclei frequency was observed among sites ( p=0.036). Post-hoc analysis revealed that the residential area exhibited a lower micronuclei frequency than the university and city center areas. In conclusion, we found that the gradients of ambient air pollution of Córdoba are associated with changes in the spontaneous micronuclei frequency of Tradescantia pollen mother cells. These results indicate that in situ biomonitoring with higher plants may be useful for characterizing air pollution in areas without instrumental monitoring techniques, or for exploring the distribution of air contaminants at a microscale.

  6. Pollution trends using bark of morus alba in the cities of buenos aires and mendoza (Argentina Tendências de poluição usando cascas de morus alba nas cidades de buenos aires e mendoza (Argentina

    Directory of Open Access Journals (Sweden)

    Patricia Perelman

    2010-06-01

    Full Text Available A comparative study of elements deposited on tree bark was carried out for urban and periurban areas of two of the most important cities in Argentina. The content of Fe, Mg, Al, Mn, Zn, Pb, Ba, Cr, Hg, Cu, Ni, Cd and Sb was determined by inductively coupled plasma atomic emission spectrometry (ICP-OES in Morus alba tree bark collected in the cities of Buenos Aires and Mendoza. The main air pollutants detected in the Buenos Aires urban area were Ba, Cr, Cu and Ni and indicate significative difference from the Mendoza urban and periurban areas. Significantly, higher concentrations of Zn, Ba, Cr and Cu were recorded in the periurban area of the city of Buenos Aires than in Mendoza. Bark samples were strongly influenced by dust and show Al, Fe, Mg and other element accumulations that indicate that soil particles were carried out by wind. Elements like Ba and Zn, commonly linked to traffic emissions, showed the highest concentrations in the Buenos Aires metropolitan area, possibly due to more intensive vehicular traffic. Our results indicated that intensity of vehicular traffic and not city structure is responsible for air pollution.Um estudo comparativo dos elementos depositados nas cascas das árvores foi realizado nas áreas urbanas e na periferia de duas cidades das mais importantes da Argentina. Os índices do Fe, Mg, Al, Mn, Zn, Pb, Ba, Cr, Cu, Ni e do Sb foram determinados pela espectrometria da emissão atômica com plasma acoplado indutivamente (ICP-OES nas cascas da árvore Morus alba, coletados nas cidades de Buenos Aires e Mendoza. Os principais elementos da contaminação do ar detectadas na área urbana de Buenos Aires foram Ba, Cr, Cu e Ni, que indicaram diferenças significativas nas áreas urbanas e na periferia de Mendoza. Uma concentração do Zn, Ba, Cr e do Cu foi achada na periferia da cidade de Buenos Aires, significativamente mais elevada do que em Mendoza. As amostras da casca foram influenciadas fortemente pela poeira e

  7. Genetic structure of Varroa destructor populations infesting Apis mellifera colonies in Argentina.

    Science.gov (United States)

    Maggi, M; Medici, S; Quintana, S; Ruffinengo, S; Marcángeli, J; Gimenez Martinez, P; Fuselli, S; Eguaras, M

    2012-04-01

    Although mitochondrial DNA mapping of Varroa destructor revealed the presence of several haplotypes, only two of them (Korean and Japanese haplotypes) were capable to infest Apis mellifera populations. Even though the Korean haplotype is the only one that has been reported in Argentina, these conclusions were based on mites sampled in apiaries from a specific geographical place (Buenos Aires province). To study mites from several sites of Argentina could reveal the presence of the Japanese genotype, especially considering sites near to Brazil, where Japanese haplotype was already detected. The aim of this work was to study the genetic structure of V. destructor populations from apiaries located in various provinces of Argentina, in order to determine the presence of different haplotypes. The study was carried out between January 2006 and December 2009. Phoretic adult Varroa mites were collected from honey bee workers sampled from colonies of A. mellifera located in Entre Ríos, Buenos Aires, Corrientes, Río Negro, Santa Cruz and Neuquén provinces. Twenty female mites from each sampling site were used to carry out the genetic analysis. For DNA extraction a nondestructive method was used. DNA sequences were compared to Korean haplotype (AF106899) and Japanese haplotype (AF106897). All DNA sequences obtained from mite populations sampled in Argentina, share 98% of similitude with Korean Haplotype (AF106899). Taking into account these results, we are able to conclude that Korean haplotype is cosmopolite in Argentina.

  8. O´Higgins 2319: departamentos transformables en Belgrano (1940-1941, Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Gonzalo Fuzs

    2014-07-01

    Full Text Available The changeable apartments in Belgrano is the first apartment building designed and built by Juan Kurchan and Jorge Ferrari Hardoy, members of the Austral Group in Argentina, who returned home after having lived in Paris where they worked in Le Corbusier’s office. This unknown and radical project was published in August 1942 in the journal Tecné. This article intends to describe the design intentions of the architects, which materialized some of the Group’s endeavours. These explorations are a reflection of the work carried out in the Rue de Sèvres and of the Parisian context of the late nineteen-thirties.

  9. Confirmación de la presencia de Cyathea atrovirens (Cyatheaceae en la provincia de Corrientes, Argentina Confirmation of the presence of Cyathea atrovirens (Cyatheaceae in Corrientes province, Argentine

    Directory of Open Access Journals (Sweden)

    J. L. Fontana

    Full Text Available Poblaciones de Cyathea atrovirens fueron halladas recientemente en dos localidades ubicadas sobre la costa del río Paraná, en la provincia de Corrientes, después de la formación del embalse de la Represa Yacyretá.Populations of Cyathea atrovirens were recently found in two locations sited on the coast of Paraná River, in the Province of Corrientes (Argentina, after the formation of the Yacyretá Reservoir.

  10. Impact of the June 2013 Riau province Sumatera smoke haze event on regional air pollution

    Science.gov (United States)

    Dewi Ayu Kusumaningtyas, Sheila; Aldrian, Edvin

    2016-07-01

    Forest and land fires in Riau province of Sumatera increase along with the rapid deforestation, land clearing, and are induced by dry climate. Forest and land fires, which occur routinely every year, cause trans-boundary air pollution up to Singapore. Economic losses were felt by Indonesia and Singapore as the affected country thus creates tensions among neighboring countries. A high concentration of aerosols are emitted from fire which degrade the local air quality and reduce visibility. This study aimed to analyze the impact of the June 2013 smoke haze event on the environment and air quality both in Riau and Singapore as well as to characterize the aerosol properties in Singapore during the fire period. Air quality parameters combine with aerosols from Aerosol Robotic Network (AERONET) data and some environmental parameters, i.e. rainfall, visibility, and hotspot numbers are investigated. There are significant relationships between aerosol and environmental parameters both in Riau and Singapore. From Hysplit modeling and a day lag correlation, smoke haze in Singapore is traced back to fire locations in Riau province after propagated one day. Aerosol characterization through aerosol optical depth (AOD), Ångstrom parameter and particle size distribution indicate the presence of fine aerosols in a great number in Singapore, which is characteristic of biomass burning aerosols. Fire and smoke haze even impaired economic activity both in Riau and Singapore, thus leaving some accounted economic losses as reported by some agencies.

  11. Nuevos registros de squamata (reptilia para el pleistoceno superior del norte de la provincia de Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Federico Agnolin

    2011-01-01

    Full Text Available En el presente artículo son reportados ejemplares de diversos taxones de reptiles escamados fósiles procedentes de la base de la Formación Luján (Pleistoceno Superior, en la localidad fosilífera de Merlo, provincia de Buenos Aires, Argentina. Entre los ejemplares registrados se reconoce el primer registro fósil para el género y especie Anops kingii (Amphisbaenidae; asimismo se reporta la presencia de especies indeterminadas de los géneros Homonota (Gekkonidae y Liolaemus (Liolaemidae. La asociación conjunta de estos tres taxones hoy en día no se encuentra representada en el norte de la provincia de Buenos Aires, siendo la región geográficamente más cercana en donde encuentran una superposición en su distribución el Partido de Balcarce, ubicado en el extremo Sureste de la provincia y alejado unos 600 kilómetros al sur de la localidad fosilífera de Merlo. La presencia conjunta de estos tres reptiles se encuentra de acuerdo con la posible existencia de un pulso árido y frío, tal como ha sido propuesto con anterioridad para porción más inferior del Pleistoceno Superior en la provincia de Buenos Aires.

  12. Características químicas determinan la capacidad micotrófica arbuscular de suelos agrícolas y prístinos de Buenos Aires (Argentina Chemical characteristics as determinants of arbuscular mycotrophic ability of agricultural and pristine soils from Buenos Aires (Argentina

    Directory of Open Access Journals (Sweden)

    Fernanda Covacevich

    2012-12-01

    Full Text Available Los suelos de la provincia de Buenos Aires (Argentina presentan muy buenas características físicas y químicas para la producción agrícola, así como elevada diversidad microbiana. Sin embargo, la continua explotación agrícola del suelo, con permanente extracción de nutrientes, aceleró su degradación, afectó su fertilidad natural y las poblaciones microbianas po-tencialmente benéficas como los hongos formadores de micorrizas arbusculares (HMA, aspecto que ha sido poco explorado. El objetivo de este trabajo es identificar cambios en el contenido de nutrientes en suelos sometidos a manejos agrícolas contrastantes que podrían incidir en la capacidad micotrófica de los HMA. Se tomaron muestras de suelo de 29 sitios de la provincia de Buenos Aires bajo manejo agrícola, o sin uso (prístino. Se determinaron las características químicas (CIC, Fe, Mn, Cu, Zn, B, P-Bray, CO y pH, así como el grado de micorrización nativa, luego de 12 semanas desde la instalación de cultivos trampa. Los valores de las características químicas fueron, en general, mayores para los sitios prístinos que para los que estuvieron bajo agricultura. Sin embargo, la intensidad de micorrización no fue significativamente diferente en relación al manejo del suelo. El análisis de componentes principales permitió agrupar por una parte los sitios que se encontraban bajo agricultura y por otra parte los sitios prístinos. El contenido de P disponible en el suelo, juntamente con el contenido de Fe parecerían ser los principales depresores de la capacidad micotrófica de los suelos analizados, particularmente en condiciones de moderado a bajo contenido de Carbono Orgánico.The soils of Buenos Aires Province (Argentina have very good physical and chemical properties for agricultural production, and also a high microbial diversity. However, the continuous cropping of agricultural soils with a high nutrient removal rate has accelerated its degradation. Consequently

  13. Phlebotominae: Vectores de Leishmaniasis en las provincias de Santa Fe y Entre Ríos, Argentina Phlebotominae: vectors of leishmaniasis in the provinces of Santa Fe and Entre Ríos, Argentina

    Directory of Open Access Journals (Sweden)

    Oscar D. Salomón

    2006-06-01

    Full Text Available La transmisión de leishmaniasis tegumentaria (LT se incrementó desde 1985 en 9 provincias argentinas. Santa Fe y Entre Ríos en dicho período no notificaron casos de transmisión autóctona comprobada, sin embargo en el año 2003 ocurrió un brote epidémico en Bella Vista, Corrientes, localidad que se encuentra en un área con continuidad ecológica y contigüidad geográfica con ambas provincias. Por ello, para determinar el riesgo potencial de transmisión de LT en las áreas próximas y al sur de Bella Vista se realizaron capturas de Phlebotominae en febrero del 2004, colectándose sobre las márgenes del río Paraná en Santa Fe (El Rabón, Villa Ocampo, Cayastá y en Entre Ríos (La Paz, La Celina-Villa Urquiza 860 ejemplares de Lutzomyia neivai (99.5% y Lu. migonei (0.5 %, ambas especies con capacidad vectorial para Leishmania (V. braziliensis. En Tartagal, Santa Fe, las capturas fueron consistentes con el paisaje de «chaco» residual: 7 ejemplares de Lu. nerivai, Lu. migonei y Lu. cortelezzii. Se destaca el riesgo potencial de transmisión epidémica de LT en estas provincias, especialmente por la tropicalización progresiva hacia el sur de la selva en galeria paranaense. Se recomiendan actividades de vigilancia clínica y vectorial.The transmission of tegumentary leishmaniasis (TL has increased in 9 provinces of Argentina since 1985. Santa Fe and Entre Ríos did not record in this period autochtonous probed cases: however, an epidemic outbreak took place in 2003 in Bella Vista, Corrientes, located in an area with ecological continuity and contiguous to both provinces. In order to evaluate the potential risk of transmission of LT, Phlebotominae were captured at locations close to and southern from Bella Vista during February 2004. The traps located on the shores of Parana river in Santa Fe (El Rabón, Villa Ocampo, Cayastá, and Entre Ríos (La Paz. La Celina-Villa Urquiza captured 860 individuals of Lutzomyia neivai (99.5% and Lu

  14. Comunidades de malezas en cultivos hortícolas en la Provincia de Neuquén (Argentina Weed's communities in vegetable crops in Neuquen Province, (Argentina

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    María Beatriz Cerazo

    2008-07-01

    Full Text Available La gran mayoría de los cultivos hortícolas son muy sensibles a la competencia de malezas, las cuales inciden en los rendimientos y calidad de los mismos y en ocasiones determinan la pérdida total del cultivo. El presente trabajo tuvo como objetivo conocer la composición florística de las comunidades de malezas y su análisis sintaxonómico, ya que ambos constituyen un buen parámetro para medir el estado de los cultivos. La vegetación fue muestreada siguiendo la metodología de Braun Blanquet, en explotaciones de seis localidades de la provincia. A partir de esta información se determinaron ocho asociaciones, de las cuales seis están comprendidas en la clase Stellarietea mediae (Br. Bl. 1931 Tx., Prsg. et Lohm, 1950 y las dos restantes en Artemisietea vulgaris Lohm, Prsg et Tüxen 1950. El deficiente estado del cultivo está señalado por el desarrollo de malezas perennes de difícil control, incluidas en su mayoría en la clase Artemisietea vulgaris. Se inventariaron ochenta y nueve especies, para los periodos otoño- invierno y primavera - verano. Existe un claro predominio de Dicotiledóneas (79 % sobre Monocotiledóneas y de malezas anuales (66 % sobre perennes.Most vegetable crops are very sensitive to the weed competition, which affects the yields and quality and sometimes the total lost of the crop. The objective of this study was to evaluate the floristic composition of the weed communities and to analyse its sintaxonomy, because both are effective parameters for measuring the state of the crop. The vegetation was sampled following the Braun-Blanquet methodology on farms in six localities in the province. We determined eight associations from this information: six are included in the class Stellarietea mediae (Br. Bl. 1931 Tx., Prsg. et Lohm, 1950 and the other two in Artemisietea vulgaris Lohm, Prsg and Tüxen 1950. The deficient state of the crop resulted from the development of perennial and difficult to control weeds, most of

  15. Los coleópteros y heterópteros acuáticos del Parque Nacional Calilegua (Provincia de Jujuy, Argentina Aquatic Coleoptera and Heteroptera from Calilegua National Park (Jujuy Province, Argentina

    Directory of Open Access Journals (Sweden)

    Patricia L. M. Torres

    2008-06-01

    Full Text Available Se expone una lista de las especies de Coleoptera y Heteroptera presentes en los cuerpos de agua del Parque Nacional Calilegua. Se registraron 51 especies de Coleoptera incluidas en 28 géneros y cinco familias, y 37 especies de Heteroptera distribuidas en 22 géneros y 10 familias; sólo cuatro especies de Coleoptera y cinco de Heteroptera fueron citadas previamente del parque. Se mencionan por primera vez para la Argentina dos especies de Veliidae (Heteroptera: Rhagovelia trista Gould y Platyvelia brachialis (Stål, así como una especie y un género de Dytiscidae (Coleoptera: Desmopachria chei K. B. Miller y Bidessonotus Régimbart. Además, es la primera ocasión en que se mencionan para la provincia de Jujuy 24 especies y 11 géneros de Coleoptera (Leuronectes Sharp, Bidessonotus, Hypodessus Guignot, Desmopachria Babington, Celina Aubé, Gyrinus Linné, Haliplus Latreille, Hydrocanthus Say, Suphis Aubé, Anacaena Thomson, Derallus Sharp y 19 especies y 12 géneros de Heteroptera (Mesovelia Mulsant & Rey, Hebrus Curtis, Merragata White, Microvelia Westwood, Rhagovelia Mayr, Platyvelia J. T. Polhemus & D. A. Polhemus, Limnogonus Stål, Curicta Stål, Ranatra Fabricius, Centrocorisa Lundblad, Pelocoris Stål, Neoplea Esaki & China.A list of the species of aquatic Coleoptera and Heteroptera occurring in Calilegua National Park is presented. Fifty-one species of Coleoptera included in 28 genera and five families, and 37 species of Heteroptera belonging to 22 genera and 10 families were recorded. Only four species of Coleoptera and five of Heteroptera had been previously cited from the park. Two species of Veliidae (Heteroptera (Rhagovelia trista Gould, Platyvelia brachialis (Stål, along with one species and one genus of Dytiscidae (Coleoptera (Desmopachria chei K. B. Miller, Bidessonotus Régimbart are new records for Argentina. Twenty-four species and 11 genera of Coleoptera (Leuronectes Sharp, Bidessonotus, Hypodessus Guignot, Desmopachria

  16. [Permanence of the piamontese culture on food practices in third generation descendants in Piamonte (Province of Santa Fe, Argentina)].

    Science.gov (United States)

    Andreatta, María M; Muñoz, Sonia E; Navarro, Alicia

    2004-01-01

    This paper describes the influence of the piemontese culture on food practices of students living in Piamonte, Santa Fe, Argentina. Food practices of 96 students with Piamontese ancestry (PA) (n = 57) and without Piamontese ancestry (No-PA) (n = 39) were studied along 2002 using a self-administered questionnare. Data were analysed by Chi square test, Fisher's exact test, multiple correspondance analysis and logistic regression. Consumption of bagna cauda (p elaboration of polenta and pasta were found: PA add them cheese (p tomato sauce (p elaboration and the serving of the food were similar on both groups. In conclusion, food practices of Piamontese's descendants recall the food culture of their ancestry with some reasonable adaptations to the local context.

  17. Long-term landscape development: a perspective from the southern Buenos Aires ranges of east central Argentina

    Science.gov (United States)

    Demoulin, A.; Zarate, M.; Rabassa, J.

    2005-06-01

    Traditionally, the long-term landscape evolution of the southern Buenos Aires ranges of east central Argentina has been related to the influence of the Andean orogeny. We describe the large-scale morphological units and associated weathering products in the Tandilia and Ventania ranges. Two main planation surfaces are encountered at varying altitudes in different sectors of these ranges. The lower surface is characterized by roots of kaolinized weathering profiles in the Tandil area and silicified conglomerates around Sierra de La Ventana. In an interpretative model linking the range morphogenesis to the tectonosedimentary evolution of the bordering Salado and Colorado Basins, we suggest that the main morphogenetic stages are related to the late Jurassic-early Cretaceous south Atlantic rifting and Miocene tectonic reactivation induced by the Andean orogeny. Thus, the uplifted surfaces appear much older than commonly believed: pre-Cretaceous and Paleogene. Although they contradict recent results of apatite fission-track studies along the South America and South Africa passive margins, the implied low denudation rates (˜4 m/My) can be explained by the limited Meso-Cenozoic uplift suffered by the southern Buenos Aires ranges. The discussion also shows the limits of the comparison that can be made with the South African planation surfaces.

  18. The blue land planarian Caenoplana coerulea, an invader in Argentina La planaria terrestre azul Caenoplana coerulea, un invasor en Argentina

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    Lisandro Héctor Luis-Negrete

    2011-03-01

    Full Text Available The blue land planarian Caenoplana coerulea is reported from Argentina (Buenos Aires province. We found C. coerulea in the east central region of Argentina in anthropic environments. The specimens that we found have the characteristic of the species found in others regions; that is, a bluish dorsal surface with a yellow mid-dorsal stripe and eyes forming a single row around the anterior tip, clustered laterally. This is the first record of this species from the Neotropical Region, and together with Bipalium kewense are the only 2 species of exotic terrestrial planarians so far recorded in Argentina.La planaria terrestre azul Caenoplana coerulea se registra para el centro este de Argentina (provincia de Buenos Aires, en ambientes antropizados. Los ejemplares encontrados presentan las características de la especie registrada en otras regiones, con una superficie dorsal azulada y una hilera medio dorsal amarilla, y ojos formando una hilera alrededor del extremo anterior, agrupados lateralmente. Es la primera vez que se cita dicha especie en la Región Neotropical, y junto a Bipalium kewense son las únicas planarias terrestres exóticas registradas en Argentina.

  19. The influences of globalisation in education policy-making: the case of the charter schools in the Province of San Luis, Argentina

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    Alejandra Cardini

    2006-05-01

    Full Text Available Contextualisation This paper combines insights from the fields of educational policy and sociology, regarding the nature and impact of globalisation in national education policy, with empirical data from a particular policy-borrowing process in Argentina. Although there is extensive theoretical literature on the mechanisms by which globalisation trends influence national policy, few scholars have paid attention to the practical ways in which these global ideas shape and are disseminated in local contexts. This article is part of the growing body of literature that looks at the particular ways in which global discourses penetrate local settings. Abstract: This paper analyses to what extent specific educational reforms, in local contexts, respond to influences generally associated with the process of globalisation and the ways in which this might occur. More specifically, it looks at the origins and intentions of the Charter School policy in the Argentine province of San Luis. It aims to shed light on the practical ways in which global discourses penetrate local contexts. The paper begins by describing the context in which the charter policy took place. It then explores the transformations proposed by the policy and their link to global trends. The mechanisms, by which these international ideas were disseminated, in this particular local context, are then examined. To conclude, the paper suggests some explanations for the recent expansion of similar, educational and political, responses throughout the world.

  20. First evidence of the effects of agricultural activities on gonadal form and function in Rhinella fernandezae and Dendropsophus sanborni (Amphibia: Anura from Entre Ríos Province, Argentina

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    Laura C. Sanchez

    2014-06-01

    Full Text Available The relationship between male gonadal abnormalities and habitats with different degrees of agricultural activities was quantified in two anuran species, Rhinella fernandezae and Dendropsophus sanborni. The study sites were selected along a gradient of increasing agricultural land use in south-western Entre Ríos province (Argentina: an agroecosystem, a natural wetland (a non-agricultural site adjacent to monoculture zones, and a natural forest (not associated with agriculture. Rhinella fernandezae and D. sanborni were manually captured from each environment during field surveys. A scaled mass index (MI was evaluated for each animal. Specimens of R. fernandezae from the agroecosystem and the natural wetland site presented poorly developed seminiferous tubules, lower testicular volume, and a lower number of seminiferous tubules, primary spermatogonia, and spermatids than specimens from the natural forest site. Additionally, we observed fewer primary spermatocytes in the agroecosystem group than in the natural forest group. Individuals of D. sanborni from the agroecosystem and the natural wetland site presented poorly developed tubules, higher proportions of irregularly shaped testes, and a reduced number of primary and secondary spermatogonia compared with specimens from natural forest sites. Consequently, the affected anurans are likely to have reduced reproductive success. We suggest that agrochemical use may be associated with decreased testicular development and function in both R. fernandezae and D. sanborni occurring in agroecosystems and nearby environments. Buffer zones are needed to prevent contamination, preserve wildlife, and enhance the conservation value of pristine natural forests.

  1. Estimation of the Serial Interval for Pandemic Influenza (pH1N1 in the Most Southern Province of Argentina

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    PW Orellano

    2012-12-01

    Full Text Available Background: A retrospective cohort study, in the context of household transmission, to estimate the serial interval (SI of pH1N1 influenza in the island of Tierra del Fuego was carried out.Methods: We collected data from the epidemiological surveillance system during disease outbreak in Ushuaia and Rio Grande, the two main cities of the southernmost province of Argentina. Only the records of patients and households with a positive result of RT-PCR assay for pH1N1 virus were used.Results: A total of 283 laboratory confirmed cases were detected, from 550 samples analyzed. Hospitalizations were necessary in 13.8% of patients, yet no deaths were reported. Complete data of household contacts were available in 13 patients. We calculated an SI of 2.0 days (95% CI = 1.5 – 2.6 days, fitting to a log-normal distribution, the one that presented the best adjustment.Conclusion: These results were consistent with estimates of SI calculated from Mexico, but lower than estimations from Canada, Germany and USA. We discuss these differences in relation to limitations of the current study design.

  2. Condiciones ambientales en el sistema de bibliotecas públicas de la Municipalidad del Partido de General Pueyrredon (Pcia. Buenos Aires-Argentina)

    OpenAIRE

    Gauchi, Verónica; Laguarde, María Laura; Méndez, Rubens Ramón; Peluchi, Olga; Fernández, Oscar

    2011-01-01

    This study is based on the project research group Alexandria, which is devoting itself to the investigation of the conditions and working environment existing in Public Libraries of Municipality of General (Pvcia. of Buenos Aires - Argentina). The aim was to formalize a description of the conditions and working environment of public libraries in order to obtain objective data on risk factors to which the workers are exposed and the perception of librarians capable of producing or contribute t...

  3. Emissions inventory and scenario analyses of air pollutants in Guangdong Province, China

    Science.gov (United States)

    Chen, Hui; Meng, Jing

    2016-03-01

    Air pollution, causing significantly adverse health impacts and severe environmental problems, has raised great concerns in China in the past few decades. Guangdong Province faces major challenges to address the regional air pollution problem due to the lack of an emissions inventory. To fill this gap, an emissions inventory of primary fine particles (PM2.5) is compiled for the year 2012, and the key precursors (sulfur dioxide, nitrogen oxides) are identified. Furthermore, policy packages are simulated during the period of 2012-2030 to investigate the potential mitigation effect. The results show that in 2012, SO2, NO x , and PM2.5 emissions in Guangdong Province were as high as (951.7, 1363.6, and 294.9) kt, respectively. Industrial production processes are the largest source of SO2 and PM2.5 emissions, and transport is the top contributor of NO x emissions. Both the baseline scenario and policy scenario are constructed based on projected energy growth and policy designs. Under the baseline scenario, SO2, NO x , and PM2.5 emissions will almost double in 2030 without proper emissions control policies. The suggested policies are categorized into end-of-pipe control in power plants (ECP), end-of-pipe control in industrial processes (ECI), fuel improvement (FI), energy efficiency improvement (EEI), substitution-pattern development (SPD), and energy saving options (ESO). With the implementation of all these policies, SO2, NO x , and PM2.5 emissions are projected to drop to (303.1, 585.4, and 102.4) kt, respectively, in 2030. This inventory and simulated results will provide deeper insights for policy makers to understand the present situation and the evolution of key emissions in Guangdong Province.

  4. El urbanismo Inka y su vinculación con mesoclimas en el sitio "El Shincal de Quimivil" (Provincia de Catamarca, Argentina Inka urbanism associated with mesoclimatic conditions at the site "El Shincal de Quimivil" (Catamarca province, Argentina

    Directory of Open Access Journals (Sweden)

    Aylen Capparelli

    2006-12-01

    Full Text Available Los Inkas gestionaron el ambiente, de las distintas regiones que ocuparon, sobre la base tanto de sus conocimientos astronómicos -solares y lunares- como de aquellos referidos a la ecología y calendario agrícola -del maíz en especialde cada región. La producción excedente de una población se redistribuía luego en base a un sistema de almacenaje propio de este Estado. Dentro de este marco, se propone que el conocimiento de la diversidad de hábitats, y de los factores ecológicos a ellos asociados, les sirvió a los Inkas para planificar y garantizar el buen funcionamiento de cada unidad arquitectónica en cada centro administrativo. Por lo tanto, el objetivo principal de este trabajo es determinar si existe alguna vinculación entre las distintas condiciones mesoclimáticas que se encuentran en el lugar de implantación del sitio Inka El Shincal de Quimivil (Catamarca, Argentina y la distribución espacial de tres sectores arquitectónicofuncionales diferentes (almacenaje, habitacional, cultivo y un testigo (plaza. Se analizaron en forma univariada y multivariada 6 variables climáticas. Por sus altos valores de déficit de saturación de vapor del aire (DS, capacidad evaporante del aire y temperatura del suelo, el sector de almacenaje resultó el sector más propicio para lograr el secado y la preservación de los granos. El sector habitacional, mostró bajos DS y capacidad evaporante en primavera y verano, lo que contribuyó a condiciones más confortables bajo las elevadas temperaturas de esas estaciones. El sector cultivos, tuvo baja capacidad evaporante durante días con Zonda, y su mesoclima generalmente moderado, es el que más se ajusta a los requerimientos agroecológicos del maíz.The Inkas managed the environment of the different regions they occupied based on their astronomical and agroecological knowledge, especially in relation to maize. Surplus production was redistributed through a well developed storage system. Within

  5. Metallurgical sessions. Second ALAMET congress (held in) Buenos Aires, Argentina, 6-10 May 1991

    International Nuclear Information System (INIS)

    This congress was held in Buenos Aires, Argentine Republic, on May 6-10, 1991, gathering experts from all over the world. The present volume includes the papers presented at the Metallurgical Sessions - II. ALAMET Congress

  6. Assessment of human health risk related to metals by the use of biomonitors in the province of Cordoba, Argentina

    International Nuclear Information System (INIS)

    The evaluation of metal contents in the environment is of vital importance for the assessment of human exposure. Thus the species Usnea amblyoclada, Ramalina celastri and Tillandsia capillaris were tested as bioaccumulators of transition metals in the urban area of Cordoba city, Argentina. The level of metals on biomonitors was compared to that of total deposition samples. All three species discriminated zones within the urban area of Cordoba city with different pollution levels; they revealed high levels of Zn in the downtown area and confirmed high levels of some transition metals in an industrial area. The correlation analysis revealed that the lichen R. celastri had the highest correlation rates with total deposition samples, suggesting it is a valuable biomonitor of atmospheric pollution. A significant relationship was also observed between respiratory diseases in children and the contents of metal accumulated in R. celastri and T. capillaris, indicating their usefulness when assessing human exposure to metals. - Metal accumulation in epiphytes is correlated with human respiratory diseases

  7. Phenotypic and genotypic characterization of Streptococcus agalactiae in pregnant women: first study in a province of Argentina

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    P Oviedo

    2013-01-01

    Full Text Available Group B Streptococcus (GBS is the leading cause of neonatal infections. Our purpose was to characterize GBS colonization in pregnant women, current serotypes, resistance phenotypes and genes associated with virulence. In Misiones, Argentina, there are no previous data on this topic. Vaginal-rectal swabs from 3125 pregnant women were studied between 2004 and 2010. GBS strains were identified by conventional and serological methods (Phadebact Strep B Test, ETC International, Bactus AB, Sweden. Serotypes were detected using Strep-B Latex (Statens Serum Institut, Denmark. Resistance phenotypes were determined by the double-disk test. Genes were studied by PCR. Maternal colonization was 9.38%. Resistance to erythromycin was 11.6%, and the constitutive phenotype was the predominant one. Serotype Ia was the most frequent, whereas serotypes IV, VI, VII and VIII were not detected. The lmb, bca and hylB genes were detected in more than 79% of the strains. In this study, the colonization rate with GBS and the serotype distribution were compared with studies reported in other areas of the country. The high resistance to erythromycin in Misiones justifies performing antibiotic susceptibility testing. The serotype distribution, the genes encoding putative virulence factors, and the patterns of resistance phenotypes of GBS may vary in different areas. They thus need to be evaluated in each place to devise strategies for prevention.

  8. Lichen Usnea barbata as biomonitor of airborne elements deposition in the Province of Tierra del Fuego (southern Patagonia, Argentina).

    Science.gov (United States)

    Conti, Marcelo Enrique; Pino, Anna; Botrè, Francesco; Bocca, Beatrice; Alimonti, Alessandro

    2009-05-01

    Lichen Usnea barbata was tested as a possible biomonitor of atmospheric deposition in a supposedly pristine environment Tierra del Fuego (Argentina). Lichen samples were collected in 2005 and again in 2006 in 71 sites covering almost the entire region. The aim of the study was to evaluate the bioaccumulation of 26 elements in order to define the background levels in the region. The quantification was carried out by the sector field inductively coupled plasma mass spectrometry. No relevant temporal accumulation patterns between 2005 and 2006 sampling campaigns were observed. Then, the results were submitted to multivariate statistical analysis (cluster and principal component analyses). Cluster analysis produced a dendrogram where the 71 sites were divided into four clusters at (Dlink/Dmax)100Ushuaia-Road 3 (E area) and it was characterized by high levels of Cd, Co, Ni, Pb, Sb, and W in lichens. The present study has revealed the good capacity of U. barbata to reflect the baseline levels of elements in the environment at a regional scale level. The presence of certain level of elements in lichens agrees with the hypothesis that Tierra del Fuego is not a relatively pristine environment as occasionally supposed. However, when comparing our results with other countries, Tierra del Fuego lichens have a very low content of the measured elements. PMID:19232724

  9. Assessment of human health risk related to metals by the use of biomonitors in the province of Cordoba, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Carreras, Hebe A. [Departamento de Quimica, Instituto Multidisciplinario de Biologia Vegetal, IMBIV/CONICET-UNC, Facultad de Ciencias Exactas, Fisicas y Naturales, Universidad Nacional de Cordoba, Av. Velez Sarsfield 1611, Ciudad Universitaria, X5016GCA Cordoba (Argentina)], E-mail: hcarreras@com.uncor.edu; Wannaz, Eduardo D.; Pignata, Maria L. [Departamento de Quimica, Instituto Multidisciplinario de Biologia Vegetal, IMBIV/CONICET-UNC, Facultad de Ciencias Exactas, Fisicas y Naturales, Universidad Nacional de Cordoba, Av. Velez Sarsfield 1611, Ciudad Universitaria, X5016GCA Cordoba (Argentina)

    2009-01-15

    The evaluation of metal contents in the environment is of vital importance for the assessment of human exposure. Thus the species Usnea amblyoclada, Ramalina celastri and Tillandsia capillaris were tested as bioaccumulators of transition metals in the urban area of Cordoba city, Argentina. The level of metals on biomonitors was compared to that of total deposition samples. All three species discriminated zones within the urban area of Cordoba city with different pollution levels; they revealed high levels of Zn in the downtown area and confirmed high levels of some transition metals in an industrial area. The correlation analysis revealed that the lichen R. celastri had the highest correlation rates with total deposition samples, suggesting it is a valuable biomonitor of atmospheric pollution. A significant relationship was also observed between respiratory diseases in children and the contents of metal accumulated in R. celastri and T. capillaris, indicating their usefulness when assessing human exposure to metals. - Metal accumulation in epiphytes is correlated with human respiratory diseases.

  10. Caracterización de los Servicios de Atención en Violencia Familiar del área metropolitana de Buenos Aires, Argentina Analysis of Services Targeting Family Violence Against Women in Greater Metropolitan Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Roxana Cecilia Ynoub

    1998-01-01

    Full Text Available Se presentan, en este trabajo, un diagnóstico y evaluación de la disponibilidad de servicios existentes en la región metropolitana de Buenos Aires para la atención en Violencia Familiar Contra la Mujer. De ellos se describen las redes existentes y las articulaciones intersectoriales. Asimismo se evaluan su desarrollo institucional, los enfoques teóricos, las modalidades de intervención y la producción de información e investigaciones. Entre los resultados, se destaca la presencia de distintas perspectivas teóricas ­ particularmente entre quienes incluyen o no la temática de género ­, a las que corresponden distintas modalidades de intervención; y las conexiones ­ más informales que formales ­ entre distintos sectores y áreas oficiales y las organizaciones no gubernamentales. Finalmente se proponen las experiencias institucionales desarrolladas en esta tema como un modelo de nuevas modalidades en el diseño de políticas públicas y de salud.This study presents a diagnosis and evaluation of the availability of services related to family violence against women in Greater Metropolitan Buenos Aires, Argentina. The paper focuses on institutional development, theoretical foci, intervention modalities, and production of information and research. Existing networks and interprofessional relationships are also described. Results point to several noteworthy theoretical perspectives. Some programs include gender as an issue, while others do not. The relationship (more informal than formal between governmental and nongovernmental organizations is also a relevant issue. The paper concludes by proposing these institutional experiences as a model for the design of new public health policies.

  11. Isolation of Cryptococcus neoformans and Cryptococcus gattii from trunk hollows of living trees in Buenos Aires City, Argentina.

    Science.gov (United States)

    Refojo, N; Perrotta, D; Brudny, M; Abrantes, R; Hevia, A I; Davel, G

    2009-03-01

    The aim of this work was to describe the distribution of the members of the Cryptococcus species complex (Cryptococcus neoformans and C. gattii) in hollows of trees from seven parks in Buenos Aires City, to determine the serotypes and genotypes of these environmental isolates and to compare them with the ones reported in the 2001 survey. Four hundred and eighty nine samples were collected by swabbing all trees which had hollows or fissures in the seven parks studied. Each tree was sampled once during the study period and one or more isolates were recovered from each swab. Eight isolates of C. neoformans and 18 isolates of C. gattii were recovered from 15 out of 489 tree samples. C. neoformans was isolated from Tipuana tipu, Eucalyptus spp., and Phoenix sp. All isolates were serotype A and belonged to genotype VNI. C. gattii was isolated from Tipuana tipu, Cedrus deodara, Eucalyptus spp., Acacia visca, Cupresus sempervirens and Ulmus campestrus. All isolates were serotype B and genotype VGI, like both C. gattii strains isolated in 2001. On two occasions, both species were isolated from the same tree sample. These results reinforce and extend our previous findings especially about the presence of C. gattii serotype B, genotype VGI, in Argentina.

  12. Estrategias habitacionales de familias de sectores populares y medios residentes en el área metropolitana de Buenos Aires (Argentina

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    María Mercedes di Virgilio

    2012-12-01

    Full Text Available This article analyzes the various ways in which families face difficult habitat access conditions in the post-Fordist city. In order to do this, we have comparatively explored the housing strategies implemented by popular and middle class families residing in the Buenos Aires metropolitan area (Argentina. We have chosen popular and middle class families as a response to our interest in analyzing the effects that position in the class structure has on the actions carried out by families for their reproduction. From this point of view, the logic, the decisions, and the goals that lead to access to habitat and to the resources that are mobilized, vary according to the position that families occupy in the class structure. In this article, we advance in the analysis of housing strategies, emphasizing the differences and similarities that are observed among social groups that occupy differential positions in this structure but live in nearby locations in the city, and among social groups occupying similar positions in production and consumption but who reside in different areas and/or locations of the urban space.

  13. La aparición del cólera en Buenos Aires (Argentina, 1865-1996

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    Adriana Carlina Álvarez Cardoso

    2012-12-01

    Full Text Available El objetivo de este artículo es repensar los episodios coléricos ocurridos en el Buenos Aires (Argentina entre fines del siglo XIX y postrimerías del XX. El autor tiene en cuenta las particularidades de la infraestructura sanitaria porteña, que fue desplegada entre los años setenta (siglo XIX, una vez finalizada la primera epidemia, y el período del noventa (siglo XX. Explica las razones por las cuales el cólera se expandió de manera diferente a lo que lo se evidencia en otras ciudades del interior del país como Córdoba, Salta, entre otras; de tal modo que trabaja un aspecto poco atendido hasta ahora por los historiadores, como son las diferencias entre las epidemias de “foco” y las “extendidas”. Entendiendo, que tanto en una centuria como en otra la falta de infraestructura fueron causantes del cólera, y que hubo tendencia a ocultar el verdadero estado de esta situación.

  14. Análisis de legislación penitenciaria de la Provincia de Buenos Aires, Argentina

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    Fabián A. Quintero

    2014-06-01

    Full Text Available El objetivo del estudio fue analizar la coherencia normativa respecto de la matriz laboral,  la salud y  la ejecución de la pena privativa de la libertad en el ámbito del Servicio Penitenciario de la Provincia de Buenos Aires, Argentina. La metodología consistió en la búsqueda, organización y selección de Leyes, Decretos, Resoluciones y documentos internos de los últimos 30 años, sobre los cuales se realizó un análisis de contenido siguiendo criterios de homogeneidad y pertinencia. El análisis documental muestra que el periodo estudiado se vio signado por modificaciones normativas con objetivos diversos como suprimir la corrupción interna, mejorar las condiciones de vida de los detenidos, dar respuestas a la superpoblación carcelaria y profesionalizar al personal. Se concluye que en las tres aéreas de injerencia delimitadas, tanto por falta de decretos reglamentarios como por persistencia de normas obsoletas e inclusive por el litigio de normativas en oposición, se ha generado un campo institucional que puede ser concebido como anómico, tanto desde las perspectivas de Durkheim como de Merton. Estas modificaciones normativas han fragmentado la lógica institucional y no han logrado modificar las prácticas penitenciaristas anómalas para las cuales fueron diseñadas. 

  15. Parasitosis intestinales en poblaciones Mbyá-Guaraní de la Provincia de Misiones, Argentina: aspectos epidemiológicos y nutricionales Intestinal parasitosis in Mbyá-Guaraní populations from Misiones Province, Argentina: epidemiological and nutritional aspects

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    Graciela Teresa Navone

    2006-05-01

    Full Text Available Se describieron las enteroparasitosis más frecuentes en dos comunidades Mbyá-Guaraní de Misiones, Argentina: Kaaguy Poty e Yvy Pytá. Las parasitosis intestinales se asociaron con el estado nutricional de los individuos infectados y los factores ambientales y culturales que caracterizan a las poblaciones estudiadas. Los resultados se compararon con los obtenidos en una población aborigen vecina, Takuapí, y la población urbana más cercana: Aristóbulo del Valle. Se utilizaron las técnicas de Ritchie, Willis y Kato Katz para las muestras fecales. Se analizaron los parámetros antropométricos y se procesaron muestras de tierra. De un total 296 individuos en las cuarto poblaciones, 100 (87,7%, 63 (88,7%, 49 (96,1% y 50 (82% estuvieron parasitados en Kaaguy Poty, Yvy Pytá, Takuapí, y Aristóbulo del Valle respectivamente. El 84% de los individuos parasitados estuvieron poliparasitados. El 43% de los individuos medidos presentaron desnutrición y el 87% de ellos estaban parasitados. Hubo asociación entre el uso de letrinas y Giardia lamblia (p Intestinal parasite infestation in indigenous Mbyá-Guaraní communities in Misiones, Argentina, was described and associated with nutritional status and environmental and cultural factors. The results were compared with those from Takuapí, a neighboring indigenous population, and the nearest urban population, Aristóbulo del Valle. The Ritchie, Willis, and Kato Katz techniques were used to analyze the stool samples. Anthropometric parameters were analyzed and earth samples processed. From a total sample of 296 individuals analyzed in the four populations, 100 (87.7%, 63 (88.7%, 49 (96.1%, and 50 (82% were infested in Kaaguy Poty, Yvy Pytá, Takuapí, and Aristóbulo del Valle, respectively. 84% of infested individuals had multiple parasites. The 43% of the individuals presented malnutrition, and 87% of these were infested. There was an association between use of latrines and Giardia lamblia (p < 0

  16. Leaf anatomy of medicinal shrubs and trees from Misiones forest of the Paranaense Province (Argentina: Part 2 Anatomía foliar de arbustos y árboles medicinales de la Selva Misionera de la provincia Paranaense (Argentina: Parte 2

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    Ana M. Arambarri

    2008-07-01

    Full Text Available The present paper contains the study of the second part of medicinal shrubs and trees from Paranaense province. Forty five species of shrubs and trees belonging to 29 families inhabiting Misiones forest of the Paranaense biogeographic province (Argentina have been cited with medicinal properties. The work provides illustrations of diagnostic characters and conclusions of the main botanical differential traits, such as the presence of crystaliferous epidermis (e.g. Trixis divaricata subsp. divaricata; stomata and trichomes types (e. g. ciclocytic stomata in Pilocarpus pennatifolius and scale peltate trichomes in Tabebuia heptaphylla; midvein transection outlines (e.g. midvein convex and keel-shaped on the adaxial side in Schinus weinmanniifolia; presence and types of crystals (e.g. crystal sand in Cordia ecalyculata, raphides in Psychotria carthagenensis. This paper also gives an ecological interpretation of the species studied which shows predominantly a combination of mesomorphic (e.g. hypostomatic leaves, dorsiventral mesophyll and xeromorphic leaf traits (e.g. thick cuticle, abundant sclerenchyma, multilayered epidermis, mesophyll formed exclusively by palisade parenchyma, multilayered hypodermis, presence of sclereids. Only two species (Ilex paraguariensis and Manihot grahamii have mesomorphic (e.g. hypostomatic leaves, dorsiventral mesophyll and hygromorphic leaf characters (e.g. epidermis glabrous. Finally, the work provides a key to distinguish 107 medicinal shrubs and trees from the Paranaense biogeographic province (Part 1: Gallery forests and Part 2: Misiones forest that permit identified species using anatomy leaf characteristics.El presente trabajo corresponde a la segunda entrega del estudio de arbustos y árboles medicinales de la provincia biogeografica Paranaense. En esta parte, se analizaron 45 especies contenidas en 29 familias que habitan la Selva Misionera y han sido citadas con propiedades medicinales. El trabajo se acompa

  17. Aporte aborigen y africano de diferentes regiones de la Argentina en Buenos Aires

    OpenAIRE

    Avena, Sergio Alejandro; Goicoechea, Alicia Susana; Clapsos, R.; Dugoujon, Jean Michel; Dejean, Cristina Beatriz; Perosino, María C.; Carnese, Francisco R.

    2003-01-01

    En trabajos anteriores realizados en muestras poblacionales de la Región Metropolitana de Buenos Aires (RMBA) hemos observado un 15,2 % de aporte indígena (AI) y un 3,8% de africano (AA). En el presente estudio se analizó una muestra de 169 individuos provenientes de las regiones del noroeste (NOA), del nordeste (NEA) y del centro del país (CP, se excluye la RMBA) que fueron donantes en el Banco de Sangre de la Provincia de Buenos Aires. Esta muestra se adicionó a las previamente obtenidas de...

  18. Pobreza y desempeño ejecutivo en alumnos preescolares de la ciudad de Buenos Aires (Republica Argentina

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    Sebastián Javier Lipina

    2004-01-01

    Full Text Available El estudio de los efectos de la pobreza sobre el desempeño cognitivo durante las primeras fases del desarrollo, ha sido efectuado predominantemente en base a la definición de pobreza según el ingreso y el uso de paradigmas de inteligencia basados en la hipótesis de un factor general de funcionamiento cognitivo. En el presente trabajo se utilizó el concepto de Necesidades Básicas Insatisfechas (NBI como criterio de pobreza y se aplicó un paradigma cognitivo de funcionamiento ejecutivo proveniente de la Neurociencia. El mismo plantea el análisis de componentes de comportamientos inteligentes orientados hacia objetivos y asociados a la activación de circuitos cerebrales que involucran centralmente a la región prefrontal. Se comparó el desempeño ejecutivo de 247 niños escolarizados de 3 a 5 años de edad, provenientes de hogares pobres (NBI y no pobres o con Necesidades Básicas Satisfechas (NBS, y de jardines de infantes del Distrito Escolar 4 de la Ciudad de Buenos Aires (Boca-Barracas y de distritos escolares de Vicente López y San Isidro del Gran Buenos Aires (Argentina. Se administró una batería de pruebas que evalúan componentes de flexibilidad cognitiva, logro de objetivos y control atencional. Los resultados obtenidos muestran perfiles de desempeño diferentes entre ambos grupos. El perfil de desempeño menos eficiente en términos de las variables estudiadas se observó en el grupo de niños proveniente de hogares pobres. Estos resultados constituyen un aporte significativo de un paradigma neurocientífico para la implementación de estrategias de intervención orientadas a estimular el funcionamiento cognitivo de tipo ejecutivo de niños de edad preescolar.

  19. Parasites in rodent coprolites from the historical archaeological site Alero Mazquiarán, Chubut Province, Argentina

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    Norma Haydée Sardella

    2009-02-01

    Full Text Available The aim of this study was to examine the parasitic remains that were found in rodent coprolites collected from the archaeological site Alero Mazquiarán (Chubut Province, 45º44'15"S, 70°25'9"W, which is assigned to the interface of the Araucanian and Tehuelche cultures, dated at 212 ± 35 years B.P. The faecal material from two unidentified rodent species (X-10 and X-11 was collected from one human pelvic cavity found in a multiple burial. The faecal samples were processed and examined using paleoparasitological procedures. The X-10 coprolites were positive for eggs of Monoecocestus sp. (Cestoda: Anoplocephalidae and the X-11 faeces were positive for Pterygodermatites sp. (Nematoda: Rictulariidae, Trichosomoides sp. (Nematoda: Trichosomoididae and Monoecocestus sp. In this study, we discuss parasitic life cycles, the zoonotic importance of parasites and the behaviour of the aboriginal people.

  20. Parasites in rodent coprolites from the historical archaeological site Alero Mazquiarán, Chubut Province, Argentina.

    Science.gov (United States)

    Haydée Sardella, Norma; Horacio Fugassa, Martín

    2009-02-01

    The aim of this study was to examine the parasitic remains that were found in rodent coprolites collected from the archaeological site Alero Mazquiarán (Chubut Province, 45 degrees 44'15''S, 70 degrees 25'9''W), which is assigned to the interface of the Araucanian and Tehuelche cultures, dated at 212 +/- 35 years B.P. The faecal material from two unidentified rodent species (X-10 and X-11) was collected from one human pelvic cavity found in a multiple burial. The faecal samples were processed and examined using paleoparasitological procedures. The X-10 coprolites were positive for eggs of Monoecocestus sp. (Cestoda: Anoplocephalidae) and the X-11 faeces were positive for Pterygodermatites sp. (Nematoda: Rictulariidae), Trichosomoides sp. (Nematoda: Trichosomoididae) and Monoecocestus sp. In this study, we discuss parasitic life cycles, the zoonotic importance of parasites and the behaviour of the aboriginal people.

  1. Analysis and environmental diagnosis of rural habitat in arid zones of the Province of San Juan, Argentina

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    María Guillermina Re

    2015-03-01

    Full Text Available This paper presents the environmental analysis on rural communities on arid zones of the province of San Juan. The objective of this research is to perform a diagnosis and to develop proposals for future improvements on this region. The analysis was carried out at two different scales: one on the natural environment (macro scale, and another one, on the humanized environment (micro scale, represented by the productive farms, considered as the core of the rural domestic and productive habitat. This research allowed a characterization of the environment and an understanding of the rules that structure the rural habitat in San Juan, and also to perform an evaluation and diagnosis of this type of rural habitat.

  2. Thermal and mineral resource exploitation in Angaco department, province of San Juan, Argentina, as therapeutic and recreational resort area

    International Nuclear Information System (INIS)

    In this paper the development of the Guayaupa thermal and mineral spring water intended as therapeutic and recreational resort area is presented. This area is located on the western piedmont of the Pie de Palo range, Department of Angaco, province of San Juan. From the analysis of the information related to geological, hydrogeological, hydrochemical, location, accessibility and climate aspects and also to the processing of the Landsat Tms satellite images to evaluate the geomorphologic and flora features an ordered diagnosis of the organization internal reality and its relation with the environment (FODA analysis) is presented. Internal strengths and weaknesses and the external factors that generate both opportunities and/or hazards were identified to define strategy guidelines that meet the legal and environmental standards in force. Results obtained from the strategic planning process conclude the availability and convenience of the project.(author)

  3. Archosauriform remains from the Late Triassic of San Luis province, Argentina, Quebrada del Barro Formation, Marayes-El Carrizal Basin

    Science.gov (United States)

    Gianechini, Federico A.; Codorniú, Laura; Arcucci, Andrea B.; Castillo Elías, Gabriela; Rivarola, David

    2016-03-01

    Here we present archosauriform remains from 'Abra de los Colorados', a fossiliferous locality at Sierra de Guayaguas, NW San Luis Province. Two fossiliferous levels were identified in outcrops of the Quebrada del Barro Formation (Norian), which represent the southernmost outcrops of the Marayes-El Carrizal Basin. These levels are composed by massive muddy lithofacies, interpreted as floodplain deposits. The specimens consist of one incomplete maxilla (MIC-V718), one caudal vertebra (MIC-V719), one metatarsal (MIC-V720) and one indeterminate appendicular bone (MIC-V721). The materials can be assigned to Archosauriformes but the fragmentary nature and lack of unambiguous synapomorphies preclude a more precise taxomic assignment. The maxilla is remarkably large and robust and represents the posterior process. It preserved one partially erupted tooth with ziphodont morphology. This bone shows some anatomical traits and size match with 'rauisuchians' and theropods. MIC-V719 corresponds to a proximal caudal vertebra. It has a high centrum, a ventral longitudinal furrow, expanded articular processes for the chevrons, a posteriorly displaced diapophysis located below the level of the prezygapophyses, and short prezygapophyses. This vertebra would be from an indeterminate archosauriform. MIC-V720 presents a cylindrical diaphysis, with a well-developed distal trochlea, which present resemblances with metatarsals of theropods, pseudosuchians, and silesaurids, although the size matches better with theropods. MIC-V721 has a slender diaphysis and a convex triangular articular surface, and corresponds to an indeterminate archosauriform. Despite being fragmentary, these materials indicate the presence of a diverse archosauriforms association from Late Triassic beds of San Luis. Thus, they add to the faunal assemblage recently reported from this basin at San Juan Province, which is much rich and diverse than the coeval paleofauna well known from Los Colorados Formation in the

  4. Vigilancia epidemiológica de enfermedades transmitidas por alimentos en la provincia de Río Negro, Argentina, 1993-2001 Surveillance of foodborne diseases in the Province of Rio Negro, Argentina, 1993 - 2001

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    Silvana Di Pietro

    2004-04-01

    Full Text Available Se describen 39 brotes de enfermedades transmitidas por alimentos que afectaron a 958 personas en la provincia de Río Negro, Argentina, en el período 1993- 2001. Se identifican los agentes causales, los alimentos involucrados, los sitios de ocurrencia, los factores de riesgo involucrados y los mecanismos de notificación empleados. Salmonella spp (38%, Trichinella spiralis (15%, Escherichia coli (13% y Staphylococcus aureus (15% resultaron los agentes más frecuentes en los brotes. Salmonella spp. también produjo el mayor número de casos (52%. Los principales alimentos involucrados resultaron cárneos (36%, quesos (10%, fiambres y sándwiches (10%, postres (10% y helados (8%. El mayor número de casos, por su parte, fue causado por la ingestión de helados (37%. Con relación al origen de los alimentos, 41% de los brotes fueron causados por comidas elaboradas en los domicilios, 23% en establecimientos comerciales, 13% en fiestas familiares, 8% en fiestas comunitarias y 8% en restaurantes de hoteles. En el 28% de los brotes fue identificado el agente etiológico por análisis epidemiológico exclusivamente, en el 64% se logró el aislamiento del agente, mientras que en el 8% de los casos no se logró el diagnóstico definitivo. Se analiza el valor de la encuesta epidemiológica en los estudios de enfermedades transmitidas por alimentos, la necesidad de fortalecer el sistema de notificación médica de casos y brotes y la importancia de las buenas prácticas en la manipulación de alimentos.A total of 39 outbreaks of foodborne diseases affecting 958 people in the province of Rio Negro, Argentina between 1993 and 2001 are described and evaluated. The main causal agents were identified involving food, sites of occurrence, risk factors and notification system used. Salmonella spp (38%, Trichinella spiralis (15%, Escherichia coli (13% and Staphylococcus aureus (15% were the most frequent agents present in outbreaks. Salmonella spp produced the

  5. Early breeding of buffalo heifers: Mineral supplementation and its effects on development and pregnancy rates in the province of Corrientes, Argentina

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    E. Mollica

    2010-02-01

    Full Text Available Two commercial mineral supplement formulae were used to evaluate their effects on body weight, average daily gain and reproduction at first breeding in seventy buffalo heifers, between 14 and 16 months old. Pasture from this area of the province of Corrientes, Argentina, is known to be phosphorus and sodium deficient. The experiment began on 26th December 2005 and ended on 9th August 2006. On 15 th May 2006 two bulls were introduced in each group for 59 days. Treatments were: (a usual mineral supplement (US - Ca=12% and P=6%; (b a mineral quelated supplement (QS, Tortuga™ - Ca=5,7%, P=4,1%, Na, K, Co, Cu, Fe, Se, Zn, N. Minerals were supplied every week ad libitum. Animals were kept in separate paddocks and were rotated every month to minimize the paddock effect. Body weight, jugular blood and stool samples were taken every month. Blood serum was assayed for mineral and progesterone (P4 concentration. Crude protein and dry matter digestibility were estimated on faecal samples by NIRS scanning. The weight at weaning, the initial and the final live weight for the breeding period were: 224.6 and 230.7, 322.2 and 321.7 and 342.8 and 326.6 kg. in QS and US groups, respectively. Live weight was increased by QS supplement (Table 1. Pregnancy rates, determined by transrectal ultrasound, were 60.0% and 17.3 % (P<0.05 for QS and US groups, respectively. It is concluded that QS supplement increased the body development and the early pregnancy rates in buffalo heifers. Further investigation is needed to confirm these findings.

  6. Indoor air quality levels in a University Hospital in the Eastern Province of Saudi Arabia

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    Mahmoud F El-Sharkawy

    2014-01-01

    Full Text Available Aim of the Study: The complex hospital environment requires special attention to ensure a healthy indoor air quality (IAQ to protect patients and healthcare workers against hospital-acquired infections and occupational diseases. Poor hospital IAQ may cause outbreaks of building-related illness such as headaches, fatigue, eye, and skin irritations, and other symptoms. The general objective for this study was to assess IAQ inside a large University hospital at Al-Khobar City in the Eastern Province of Saudi Arabia. Materials and Methods: Different locations representing areas where most activities and tasks are performed were selected as sampling points for air pollutants in the selected hospital. In addition, several factors were studied to determine those that were most likely to affect the IAQ levels. The temperature and relative percent humidity of different air pollutants were measured simultaneously at each location. Results: The outdoor levels of all air pollutant levels, except volatile organic compounds (VOCs, were higher than the indoor levels which meant that the IAQ inside healthcare facilities (HCFs were greatly affected by outdoor sources, particularly traffic. The highest levels of total suspended particulates (TSPs and those less than 10 microns (PM 10 inside the selected hospital were found at locations that are characterized with m4ore human activity. Conclusions:Levels of particulate matter (both PM 10 and TSP were higher than the Air Quality Guidelines (AQGs. The highest concentrations of the fungal species recorded were Cladosporium and Penicillium. Education of occupants of HCF on IAQ is critical. They must be informed about the sources and effects of contaminants and the proper operation of the ventilation system.

  7. A Maastrichtian microbial reef and associated limestones in the Roca Formation of Patagonia (Neuquén Province, Argentina

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    W. Kiessling

    2006-08-01

    Full Text Available We describe a small microbial reef and associated limestones occurring in a Maastrichtian transgressive succession of mixed carbonate-siliciclastic lithologies at Sierra Huantraico near Chos Malal (Neuquén, Argentina. Strontium isotope data suggest that the reef is of earliest Maastrichtian age. The small reef (0.8 m thick, 2 m wide is mostly composed of peloidal bindstone, dense stromatolite-cement crusts and thrombolite. Except for some ostracods, no metazoan fossils were found in the reef structure, although the majority of peloids are fecal pellets, probably of larger crustaceans. Small foraminifers with calcite tests and probable green algae have also been noted. Sedimentological data and fossils within and immediately above the reef suggest that the reef was formed in a transgressive systems tract under freshwater to brackish-water conditions. Limestones above the reef are serpulid-bryozoan packstones and intraclast-ooid grainstones. These limestones yield a mixture of typical non-tropical (common serpulids and bryozoans and typical tropical aspects (common dasycladaceans and ooids. This mosaic is explained by salinity fluctuations, which in our case dominate over temperature in determining the grain associations. Wir beschreiben ein kleines mikrobielles Riff, das in der Sierra Hunatraico (Neuquén, Argentinien in einer transgressiven, gemischt siliziklastisch-kalkigen Abfolge gefunden wurde. Nach Strontiumisotopen-Datierung ist das Riff in das unterste Maastrichtium zu stellen. Das kleine Riff (0,8 m Mächtigkeit, 2 m Breite besteht überwiegend aus peloidalem Bindstone, dichten Stromatolith-Zement-Krusten und Thrombolith. Mit Ausnahme von Ostrakoden konnten keine Metazoen in der Riffstruktur nachgewiesen werden, obwohl die Mehrzahl der Peloide als Kotpillen zu interpretieren sind, die vermutlich auf größere Krebse zurückgehen. Kleine Foraminiferen und mögliche Grünalgen sind die einzigen zusätzlich nachweisbaren Eukaryoten

  8. Y-CHROMOSOMAL STR HAPLOTYPE DIVERSITY IN A SAMPLE FROM THE METROPOLITAN AREA OF BUENOS AIRES (ARGENTINA/Diversidad de Haplotipos del cromosoma Y en una muestra del área metropolitana de Buenos Aires (Argentina

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    Maria Laura Parolin

    2012-11-01

    Full Text Available El objetivo de este trabajo fue analizar el origen de los haplotipos del cromosoma Y en una muestra poblacional del Área Metropolitana de Buenos Aires (AMBA, y comparar estos resultados con los obtenidos previamente a nivel mitocondrial. Se determinaron 17 marcadores Y-STRs en 85 donantes no emparentados. Un total de 85 haplotipos únicos fueron observados. La diversidad haplotípica  fue de 1,000+/-0.0018, y la diversidad genética media de 0,680+/-0,095. Los linajes paternos evidenciaron una homogeneidad genética de raíces Europeas (93%, procedentes principalmente de Italia y España. La contribución amerindia paterna asociada al sub-haplogrupo Q1a3a fue relativamente baja (6%. La menor proporción de haplotipos amerindios y el elevado número de linajes maternos (44% de ese origen, revela que ha habido un aporte diferencial por género en la historia de mestizaje de esa población. Se observó un único perfil E1b1a, el cual es predominante en  África subsahariana. Estos datos, conjuntamente con la información histórica y demográfica, nos permite afirmar que el bajo aporte amerindio y subsahariano observado en  la muestra del AMBA, sería el resultado de las migraciones recientes, iniciadas a mediados del siglo XX, principalmente desde el norte de Argentina y de países limítrofes de elevada composición nativa y, en menor medida, africana. Abstract The aim of this work was to analyze the origin of Y-chromosome haplotypes in a sample from Buenos Aires Metropolitan Area (BAMA, and compare these results with those obtained at a mitochondrial level. In order to reach this objective, 17 Y-STRs were determined from 85 unrelated blood donors. A total of 85 unique haplotypes were observed. The haplotype diversity was 1.000+/-0.0018, and the average genetic diversity 0.680+/-0.095. Paternal lineages showed a genetic homogeneity of European roots (93%, mainly from Italy and Spain. Amerindian paternal contribution associated to sub

  9. HIV Status Disclosure Among Infected Men Who Have Sex With Men (MSM) in Buenos Aires, Argentina

    OpenAIRE

    Carballo-Diéguez, Alex; Balán, Iván C.; Dolezal, Curtis; Ibitoye, Mobolaji; María A Pando; Marone, Rubén; Barreda, Victoria; Ávila, María Mercedes

    2013-01-01

    Five hundred men who have sex with men were recruited in Buenos Aires using respondent driven sampling. Of them, 46 respondents (24 of them not gay identified) who were HIV infected were asked questions on serodisclosure. The sample was characterized by indicators of low socioeconomic status. Most of the respondents reported being in good to excellent health despite 42% of them having been diagnosed with AIDS. Only 10% of respondents had not disclosed their serostatus to at least one person. ...

  10. Análisis FODA del sector ostricultor artesanal de la provincia de Buenos Aires, Argentina

    OpenAIRE

    Errazti, Elizabeth; Gualdoni, Patricia; Bertolotti, María Isabel; Pagani, Andrea N.

    2011-01-01

    Se considera a la ostricultura artesanal de la provincia de Buenos Aires como una actividad promisoria y de alto impacto para el desarrollo local, sin embargo, los ostricultores tienen dificultades en la cadena productiva para: lograr un volumen de producción que les permita abastecer al mercado en forma continua y con calidad uniforme, acceder al mercado interno consolidado para colocar lo producido, lograr una escala eficiente y obtener financiamiento adecuado. Se realizó un análisis FODA (...

  11. Study on Child Abuse in Children and Adolescents in the Province of Buenos Aires:

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    Cuenya, Lucas

    2011-12-01

    Full Text Available The principal aim of this study was to provide a current description of the child and teenager maltreatment phenomenon in the Buenos Aires Province. The sample was composed by 5341 cases of children and teenagers from 0 to 20 years old, whose were treated in 2010 for having been victims of maltreatment. Physical maltreatment was the most frequent one. The girls presented major proportion of sexual abuse, whereas boys registered major proportions of negligence, physical maltreatment and desertion situation. An increase of the sexual abuse frequency in teenagers from 12 years was observed. As a whole, the information demonstrates that sex and age of victims are differentially associated with different types of maltreatment, and these are pertinent variables to have into account by future investigations, and prevention and protection organisms.

  12. Urban political ecologies of informal recyclers׳ health in Buenos Aires, Argentina.

    Science.gov (United States)

    Parizeau, Kate

    2015-05-01

    Buenos Aires׳ informal recyclers (cartoneros) confront multiple health hazards in their work. Based in a survey with (n=397) informal recyclers, this study establishes that these workers experience uneven health landscapes as evidenced through their health outcomes, the social determinants of their health, and their living and working environments. I argue that the analytical framework of urban political ecology can provide insights to the ways that the urban environments where cartoneros live and work are socially-constructed phenomena, drawing on concepts of crisis, metabolism, and multi-scalar analyses.

  13. Summer feeding ecology of Great Pampa-finches, Embernagra platensis at Laguna de Guaminí, Buenos Aires, Argentina

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    Laura M. Ferman

    2010-09-01

    Full Text Available The aim of this study was to assemble data on the summer feeding ecology of the Great Pampa-finch, Embernagra platensis at the Laguna de Guaminí, Buenos Aires, Argentina, and to explore the differences related to the dietary patterns for each sex between winter and summer when possible. The stomach contents of 43 birds were analyzed. The animal fraction was composed of Hymenoptera (45.1%, Coleoptera (32.4%, Lepidoptera (6.0%, Araneae (5% and Orthoptera (3.2%. The application of the index of relative importance (IRI resulted in 1490.4 for Coleoptera, 428.5 for Hymenoptera and 162.5 for Lepidoptera caterpillars. The vegetal fraction consisted of Triticum aestivum (26.9%, Cyperaceous (25%, Poaceae (Gramineae (19.3% and Panicum sp. (11.2%. The IRI values were 893.8 for Triticum aestivum, 174.5 for Gramineae, 126.5 for Panicum sp. and 112.8 for Scirpus sp. The food niche width was 0.33 for both sexes; the diversity index resulted in 1.06 for females and 1.33 for males and specific diversity ranged from 1.87 to 2.84. A canonical component analysis (CCA was performed on environmental and morphometric variables, and a Monte Carlo test confirmed the canonical correlations. A t-test showed that some birds harmonized with a logarithmic model and some with a geometric curve. During the summer, Embernagra platensis ingests Hymenoptera and Coleoptera more often than seeds, suggesting that two biological mechanisms could be taking place in this bird.O objetivo deste estudo foi reunir dados referentes à ecologia alimentar do Sabiá-do-banhado, Embernagra platensis, na laguna de Guaminí, Buenos Aires, Argentina, e explorar as diferenças relacionadas aos padrões dietéticos para cada sexo entre inverno e verão, quando possível. O conteúdo estomacal de 43 pássaros foi analisado. A fração animal foi composta por Hymenoptera (45,1%, Coleoptera (32,4%, Lepidoptera(6,0%, Araneae (5% e Orthoptera (3,2%. A aplicação do índice de importância relativa (IRI

  14. Museos regionales en el Sudeste de la Provincia de Buenos Aires: Una aproximación a la problemática del patrimonio arqueológico Regional museums in southeast Buenos Aires province: an approach to the archaeological heritage issue

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    Irene Elena Brichetti

    2009-06-01

    Full Text Available Los museos nacionales en Argentina surgen conforme al influjo ejercido por la moderna idea de progreso y el imperialismo inscripto en el discurso museológico a través de la justificación de la superioridad occidental. El mundo postcolonial ha abierto otras perspectivas y nuevas voces pugnan por ser incluidas en la historia a través de su incorporación en el debate patrimonial. En este contexto mundial y desde hace tres décadas están creciendo los localismos justamente cuando una incipiente cultura común o global parece elevarse por sobre las singularidades. Es en este marco donde han surgido pequeños museos captados por el ámbito municipal en localidades bonaerenses. Aquí analizaremos cómo esos museos regionales del sudeste de la provincia de Buenos Aires (Miramar, Santa Clara del Mar, Balcarce se inscriben en la problemática del patrimonio arqueológico a partir de la relación entre lo local y lo global, la multivocalidad y el turismo.National museums in Argentina emerged with the influence of the idea of progress and imperialism inscribed in a museological discourse that served to justify western superiority. The postcolonial world has introduced other perspectives and new voices which struggle to be included in history through inclusion in the debate around patrimony. In this worldwide context for the past three decades localism has been growing at the same time that a global and common culture has been rising out of the singularities. Consequently, small museums were opened by local governments in Buenos Aires Province. Our objective is to analyze how the regional museums in southeast Buenos Aires Province (Miramar, Santa Clara del Mar, Balcarce are included in the current heritage debate on the basis of the relationship between the local and the global contexts, multivocality and tourism.

  15. Aporte aborigen y africano de diferentes regiones de la Argentina en Buenos Aires

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    Avena, Sergio Alejandro

    2003-01-01

    Full Text Available En trabajos anteriores realizados en muestras poblacionales de la Región Metropolitana de Buenos Aires (RMBA hemos observado un 15,2 % de aporte indígena (AI y un 3,8% de africano (AA. En el presente estudio se analizó una muestra de 169 individuos provenientes de las regiones del noroeste (NOA, del nordeste (NEA y del centro del país (CP, se excluye la RMBA que fueron donantes en el Banco de Sangre de la Provincia de Buenos Aires. Esta muestra se adicionó a las previamente obtenidas de las mismas regiones en los hospitales de Clínicas e Italiano. El objetivo fue evaluar si existe una distribución diferencial del AI y el AA según la región de origen de los dadores. Para ello se determinaron los sistemas ABO, Rh, MNS, Diego, Duffy, Gm y Km. Las frecuencias génicas y haplotípicas fueron calculadas mediante métodos de máxima verosimilitud y la mezcla génica se calculó aplicando el programa ADMIX. La región con mayor AI fue NOA (49,5% seguida por NEA (28,4% y CP (17,2%, mientras que el AA fue similar en las tres regiones (NOA 3,2%, NEA 3,5% y CP 3,8.

  16. Algal and Cyanobacterial communities in two rivers of the province of San Luis (Argentina subjected to anthropogenic influence

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    Jorgelina Daruich

    2013-03-01

    Full Text Available AIM: The use of biological indicators of pollution has increased in recent years as an alternative to the monitoring of water quality. Phytoplankton community selectively respond to different anthropogenic disturbances, such as water dams and the increase of nutrients coming from city centers, which leads to the eutrophication of the aquatic environment. The objective of this work was to evaluate the composition and the structure of the algal and Cyanobacterial communities in order to prove human influences by the presence of reservoirs with some degree of eutrophication and the impact of urbanization in two rivers at the Bebedero basin in San Luis province (Argentine. METHODS: Four sites were sampled: two of them were placed before dams and villages (V1 and (P1 and two after them (V2 and (P2. Each site was visited in every season of the year: summer, autumn, winter and spring. Qualitative and semi-quantitative phytoplankton samples were taken, and the frequency of occurrence was determined. Variations between pairs of sampling stations were analyzed through the Jaccard similarity and complementarity indices. RESULTS: Ninety two taxa were identified, of which diatoms were the most frequent. The most affected station was P2 with high abundance, less diversity and equitability, whereas the species more tolerant to the presence of organic matter were Melosira varians, Navicula tripunctata, Oscillatoria limosa, Gomphonema parvulum and Coelastrum microporum, and some species of euglenophytas. CONCLUSION: Therefore, the structure and composition of the algal and Cyanobacterial communities allowed us to identify sections more sensitive to human-induced alterations.

  17. Culicidae (Diptera) community structure, spatial and temporal distribution in three environments of the province of Chaco, Argentina.

    Science.gov (United States)

    Stein, Marina; Santana, Mirta; Galindo, Liliana María; Etchepare, Eduardo; Willener, Juana Alicia; Almirón, Walter Ricardo

    2016-04-01

    The aim of this work was to study the composition of the Culicidae community in three environments with different degrees of anthropic disturbance in the province of Chaco. The nonparametric richness estimator ACE was calculated to measure the completeness of the sampling in each environment, and the diversity of each environment (α-diversity) were estimated. The composition, abundance and uniformity of species from the different environments were compared by means of range-species curves. β-diversity was measured as species complementarity, which allowed us to know the degree of dissimilarity among the environments. The synanthropic index was estimated, identifying urban environment (synanthropic) species, eusynanthropic species, and wild species. The influence of climatic factors (mean temperature, relative humidity and rainfall) on the monthly and annual variations of the identified mosquito species was analysed using multilevel Poisson models with over-dispersion. The wild environment showed higher diversity and the semi-urban environment higher species richness. Despite having lower S and abundance, the urban environment showed greater diversity than semi-urban environment, although it also showed lower completeness, which means S could increase. Anthropogenic disturbance can lead to the elimination and/or modification or substitution of habitats, with the subsequent loss of richness in the more sensitive species of Culicidae fauna, although the conditions are also favourable for the settling of opportunistic and exotic species well-adjusted to disturbed environments. Most of the species abundances were positively influenced by the analysed climatic variables. The study area showed a rich Culicidae fauna of public health significance, with a risk of pathogen transmission, suggesting the need of further studies and the febrile and entomological surveillance.

  18. [Genomic heterogeneity of hepatitis B virus, genotype A circulating in the metropolitan area of Buenos Aires, Argentina].

    Science.gov (United States)

    Fernandez, C; Mariana; de Torres, R A

    1996-01-01

    HVB DNA was extracted from highly purified Dane particles, from sera of HBV viremic patients, collected in the metropolitan area of Buenos Aires (Argentina). HBV DNA was cloned in pUC18 vector, amplified in Escherichia coli DH5 F'. Plasmids were recovered and analyzed for HBV DNA inserts. Three recombinant plasmids, pHB4, pHB7 and pHB20 were selected, and HBVDNA inserts sequenced. The resulted sequences were incorporated at the GenBank, with the following accession numbers: PHB4P3=U33188; PHB4P5=U33189; PHB7P3=U33190; PHB7P5=U33191 and PHB20=U33190; PHB7P5=U33191 and PHB20=U33187. All belongs to the genotype A, pHB4 and pHB20 have a very close relation in between each other and with L13994 sequence, from North America origin. pHB7 have a significant distance from pHB4 and pHB20 and have a discrete homology with m57633 detected in Philippines. pHB4 shows a mutation at the T 3182-Leu in the preS1 region that change Pro for Leu, this mutation is absent in 125 sequences selected (having a 65% or more of homology) from NCBI by Blast algortm. The sequence of the pre C regions of all three inserts do not show any evidence to belong to the e-or scape mutants. Type A genotypes shows to be common in the area, but a hight degree of divergence have been demonstrate between two circulating strains. PMID:9335928

  19. La distribución del gasto educativo en la provincia de Buenos Aires, Argentina: ¿Es equitativa?

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    María Marta Formichella

    2015-01-01

    Full Text Available La equidad en educación es socialmente deseable debido a la relevancia de la formación en el desarrollo de las personas. Por ello, resulta interesante estudiar si la asignación del gasto destinado a educación tiene en cuenta este aspecto. Dado que el concepto de equidad no es un unívoco, es necesario definir una postura; en el trabajo se asume que existe equidad educativa si hay igualdad en los resultados educativos. Así, el objetivo de éste es analizar si la distribución del gasto educativo entre los distritos de la provincia de Buenos Aires, Argentina, es equitativa. Se planteó la hipótesis de que no lo es. Para contrastarla, se utilizó el coeficiente de GINI y una regresión de Mínimos Cuadrados Ordinarios (MCO. Se halló que la distribución de los fondos se vincula en forma directa con el grado de analfabetismo de los distritos, pero al mismo tiempo se encontró evidencia de que es independiente de la pobreza, de la tasa de abandono escolar, del porcentaje de matrícula en los niveles iniciales y de la proporción de establecimientos clasificados como desfavorables. Entonces, se concluye que la distribución de los fondos de gastos educativos no se rige, o lo hace muy débilmente, por el principio de equidad considerado en el trabajo. Es decir, que la evidencia empírica verifica la hipótesis propuesta.

  20. Análisis arqueofaunísticos de los sitios Loma Ruiz 1 y El Tigre (Partidos de Villarino y Patagones, provincia de Buenos Aires: Aportes para el conocimiento de la subsistencia en el valle inferior del río Colorado durante el Holoceno tardío Archaeofaunistic analysis of Loma Ruiz 1 and El Tigre sites (Villarino and Patagones districts, Buenos Aires province, Argentina: a contribution to knowledge of subsistence in the lower basin of the colorado river during the late Holocene

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    Luciana Stoessel

    2007-12-01

    Full Text Available En este artículo se presentan los resultados obtenidos a partir de los análisis llevados a cabo en los conjuntos faunísticos de los sitios Loma Ruiz 1 y El Tigre (Partidos de Villarino y Patagones, provincia de Buenos Aires. El objetivo general es contribuir al conocimiento de la subsistencia de los grupos cazadores-recolectores que habitaron el valle inferior del río Colorado durante el Holoceno tardío. A partir de los estudios arqueofaunísticos realizados en los conjuntos mencionados, sumado a la evidencia faunística proveniente de otros sitios arqueológicos del área y a la información proporcionada por los análisis de isótopos estables y de los materiales de molienda se planteó un patrón preliminar de subsistencia. Dicho patrón sugiere que durante el Holoceno tardío inicial (ca. 3000-1000 años AP la subsistencia estuvo basada en la explotación del guanaco, complementada con el consumo de venado de las pampas y ñandú y con aportes de recursos vegetales. Sin embargo, se plantea que hacia el Holoceno tardío final (ca. 1000-300 años AP habría existido un espectro mayor de especies faunísticas explotadas, con la incorporación a la dieta de taxa de menor tamaño (i.e., peludo, piche, el aporte de recursos fluviales (percas, posiblemente marinos y vegetales.In this paper, the results obtained from an analysis carried out on the faunal assemblages of the Loma Ruiz 1 and El Tigre sites (Villarino and Patagones Districts, Buenos Aires Province are presented. The general objective is to contribute to insights into the subsistence of hunter-gatherer groups who inhabited the lower basin of the Colorado River during the late Holocene. A preliminary subsistence pattern is presented on the basis of the archaeofaunal analysis, faunal evidence originating from other archaeological sites in the area, and the information provided by the analysis of stable isotopes and grinding materials. This pattern suggests a subsistence strategy based

  1. Mapa de riesgo de temperaturas extremas frías para el sur de la provincia de Buenos Aires usando datos satelitales y de superficie Frost risk map for the south of Buenos Aires province using satellite and surface data

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    Roberto De Ruyver

    2012-06-01

    Full Text Available Cerca del 40 % del área sembrada con trigo en Argentina se concentra en el sur de la provincia de Buenos Aires. Los eventos frecuentes de temperaturas extremas frías en la segunda quincena de octubre, coincidentes con un momento fenológico sensible del trigo, provocan daños de importancia en el cultivo. El presente trabajo tiene como objetivo proveer mapas de riesgo de temperaturas extremas frías para el período sensible del cultivo de trigo en esa región. Se utilizó información de los canales 3, 4 y 5 del satélite NOAA de 1,09 km² de resolución espacial, obtenidas en el Instituto de Clima y Agua del INTA-Castelar entre 2005 y 2008, y datos diarios de temperaturas mínimas del período 1961-2008 de 13 estaciones de superficie del Servicio Meteorológico Nacional (SMN y del Instituto Nacional de Tecnología Agropecuaria (INTA. Los resultados muestran que las áreas de mayor riesgo son aquellas que combinan menor altura sobre el nivel del mar y al mismo tiempo mayor distancia al mismo. Esta metodología puede ser extendida a otros cultivos y a otras regiones. Este tipo de análisis constituye una herramienta que puede ser útil en tareas de planificación tanto a nivel estatal como privado.Cold temperature can cause severe damage in crops when a cold front irruption occurs. This is especially true in some specific periods on the growing crops mainly during spring. This work presents frost risk maps for wheat. The region selected was the south of Buenos Aires province in Argentina. Wheat covers almost 2,2 million ha in south Buenos Aires area which represents 40% of the total wheat cultivated in Argentina At the same time, south Buenos Aires area suffers the biggest damage on wheat because of frost during spring time. The study was carried out based on channels 3, 4 and 5 of NOAA satellite images (1,09 km² spatial resolution. Images from 2005 to 2008 were available. Minimum daily temperatures from "Servicio Meteorológico Nacional

  2. Impact of wildfire smoke in Buenos Aires, Argentina, on ocular surface

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    Martin Berra

    2015-04-01

    Full Text Available Purpose: To evaluate the acute impact of the wildfire smoke episode in 2008 on the ocular surface of subjects living in the Metropolitan Area of Buenos Aires (MABA. Methods: A total of 86 subjects were evaluated: Group 1 comprised patients from a public ophthalmology hospital (N=35 and Group 2 comprised healthy volunteers (N=51. All subjects answered a questionnaire on ocular symptoms and underwent ophthalmologic examination [bulbar conjunctival hyperemia, corneal fluorescein staining, rose bengal vital staining, tear break-up time (TBUT, Schirmer I test, tear lysozyme, and impression cytology] during and after the acute episode. Concentrations of carbon monoxide (CO, nitrogen dioxide (NO2, and particulate matter (PM were measured before, during, and after the acute episode. Results: Both groups showed a statically significant increase in ocular symptoms and bulbar conjunctival hyperemia and a statically significant decrease in tear break-up time during the acute episode. Group 1 showed more severe symptoms and a statistically significant increase in fluorescein and rose bengal staining intensities during the acute episode. We found a significant negative correlation between ocular symptoms and tear break-up time. During the episode, the levels of CO, NO2, and particulate matter in MABA were four times higher than the usual average levels for the same period in 2007 and 2009. Conclusions: Increased air pollution from the burning of biomass is associated with a decrease in the stability of the tear film (TBUT, generating areas of ocular surface exposure that may be the cause of the increased feeling of irritation. Group 1 was more affected by not having a healthy ocular surface, and thus consulted an ophthalmologist. Cytological changes in the conjunctiva were not observed, which could be due to the short duration of the episode.

  3. EL AJARAFE: UN ESPACIO SERRANO OCUPADO EFÍMERAMENTE EN DIFERENTES MOMENTOS DEL HOLOCENO (TANDILIA, PROVINCIA DE BUENOS AIRES / El Ajarafe: An ephemeral mountain space occupied at different times of the Holocene (Tandilia, Province of Buenos Aires

    Directory of Open Access Journals (Sweden)

    Natalia Mazzia

    2011-12-01

    Full Text Available El Ajarafe es un sitio arqueológico excavado recientemente en el sector centro oriental del sistema serrano de Tandilia, provincia de Buenos Aires, Argentina. Se trata de un pequeño reparo rocoso ubicado en la cima de Sierra Larga sur. A partir de cuatro fechados radiocarbónicos fueron identificados tres momentos de ocupación humana de carácter efímero ocurridos en el Holoceno temprano y en el Holoceno tardío. En este trabajo se presenta la descripción del sitio, sus características espaciales y contextuales y los resultados obtenidos a partir de los diferentes análisis realizados. Entre éstos se incluyen análisis tecnomorfológicos de los conjuntos líticos, de procedencia de materias primas líticas y de sustancias adheridas a las superficies de los objetos mediante cromatografía gaseosa; además de análisis espaciales mediante el uso de Sistemas de Información Geográfica. A partir de la información presentada, tomando al sitio El Ajarafe como punto de partida, se propone una discusión sobre las ocupaciones humanas efímeras registradas en el ámbito serrano de Tandilia a lo largo del tiempo.   Palabras clave: cazadores recolectores; ocupaciones efímeras; Holoceno; Tandilia; Región Pampeana   Abstract El Ajarafe is an archaeological site recently excavated in the central east portion of Tandilia range, in the Buenos Aires province, Argentina. It is a small rock shelter located on the hilltop of the south portion of Sierra Larga. Three different ephemeral human occupations during early and late Holocene were identified by four radiocarbon dates. In this paper we introduce the description of the site along with its contextual and spatial characteristics. The results of different analyses are presented, as well, including the technomorphological analysis of the lithic assemblage, the lithic raw materials provenience and quantification and the gas chromatography analysis applied to organic substances adhered to the surface of

  4. LINAJES MASCULINOS Y SU DIVERSIDAD EN COMUNIDADES WICHÍ DE FORMOSA / Male lineages diversity in Wichí communities of Formosa province, Argentina

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    Virginia Ramallo

    2009-12-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}  Durante el año 2005, se realizaron dos viajes de campaña a comunidades Wichí cercanas a las localidades de Ingeniero Juárez y Laguna Yema (provincia de Formosa, Argentina, como parte del proyecto multidisciplinario “De las historias étnicas a la prehistoria en el Gran Chaco”. Partiendo del planteo metodológico de unidad poblacional, se obtuvieron datos genéticos en 93 muestras utilizando marcadores binarios y microsatélites del cromosoma Y, determinando haplogrupos y haplotipos masculinos. El haplogrupo Q1a3a, natural del continente americano, resultó mayoritario en ambas localidades (72,7 % y 81,6 %. Los linajes moleculares se compararon con la diversidad de apellidos registrada y las posibles vinculaciones entre las comunidades Wichís se analizaron  por redes “median joining”, encontrando una variabilidad de linajes coherente con la distribución de las parcialidades del “complejo étnico Wichí” propuesto por Braunstein.   Palabras claves: Herencia genética, cromosoma Y, PCR, SNP, STR   Abstract During the year 2005, as part of the multidisciplinary project “Of the ethnic histories to the prehistory of the Gran Chaco”, two field trips to the wichi communities nearing the locations of Ingeniero Juárez and Laguna Yema (Formosa province, Argentina were made. From the methodological proposal of a population unit, genetic data in 93 samples, employing binary markers and microsatellites of the Y-chromosome were obtained, determining male

  5. El transporte urbano en la Región Metropolitana de Buenos Aires, Argentina

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    Cristina Beatriz Malfa Del Grosso

    2003-01-01

    Full Text Available El objetivo de este trabajo consiste en el análisis de la oferta actual del transporte urbano en la Region metropolitana de Buenos Aires, en el marco de las concesiones otorgadas a empresas privadas, de los servicios públicos de transporte, tratando de evaluar las políticas y modalidades de regulación y gestión aplicadas desde el Estado y centrando la mirada en los efectos y consecuencias de esta modalidad, sobre el conjunto social involucrado y sobre el territorio. Se presentará un panorama general de la situación del sistema de transporte y circulación urbana a modo de síntesis diagnostica, que incluye las características mas significativas movilidad, los distintos modos de transportación, los procesos de concesión de la red de accesos a la ciudad madre, del transporte publico, tanto automotor como ferroviario de pasajeros y de las nuevas modalidades que incrementaron la oferta. Asimismo en el contexto de la Reforma del Estado, - privatizaciones y concesiones-, se incorporaran algunas reflexiones haciendo hincapié en los impactos que estos procesos provocaron en lo social, espacial-económico y ambiental, y que favorecieron el recrudecimiento de la exclusión y fractura social, y la fragmentación territorial, fenómenos ocurridos de manera general en todas las ciudades latinoamericanas sin distinción de niveles de jerarquía urbana o límites jurisdiccionales pero recortando espacialmente el estudio en la Region metropolitana de Buenos Aires.. Toda la reflexión se apoya en el marco del enfoque sistémico, partiendo de considerar que la realidad es compleja y multidimensional y que su naturaleza no es unívoca, que los elementos que la constituyen están interrelacionados entre si, por lo que existen múltiples relaciones ínter- temáticas e ínter escalares.

  6. El rururbano: un espacio de vulnerabilidad y riesgo. estudio cualitativo en la ciudad de bahía blanca, provincia de buenos aires, argentina

    OpenAIRE

    Santarelli Serer Silvia Alicia; Sereno Claudia A.

    2012-01-01

    El trabajo caracteriza el rururbano —límite externo del periurbano— de la ciudad de Bahía Blanca, provincia de Buenos Aires (Argentina), como un espacio expuesto al crecimiento urbano y como un ámbito de fragilidad y vulnerabilidad para quienes habitan estas zonas. Para ello se puntualiza en el riesgo que corren los residentes del borde frente a la amenaza de modificar sus modos de vida y de perder sus propiedades ante el avance urbano. Los resultados permiten precisar las fortalezas y debili...

  7. Sequías e inundaciones en la provincia de Buenos Aires (Argentina) y su distribución espacio-temporal

    OpenAIRE

    Olga Eugenia Scarpati; Capriolo, Alberto D.

    2013-01-01

    La provincia de Buenos Aires, importante pro- ductora agropecuaria argentina, ha sido escenario de eventos hidrológicos extremos (sequías e inundaciones) de distinto grado de gravedad a lo largo del tiempo. Muchos de ellos ocasionaron catástrofes mientras que otros solo alteraron las condiciones normales de algunas áreas. Investigadores de distintas ramas científicas han estudiado estos eventos, principalmente en sus impactos económico-sociales, pero no desde una mirada que contemple las vari...

  8. Aportes para el debate. Instrumentos de gestión ambiental en la provincia de Buenos Aires, Argentina. Una mirada interdisciplinar

    OpenAIRE

    Clara María Minaverry; Verónica Lucía Cáceres

    2016-01-01

    El artículo recupera reflexiones de dos investigaciones que siguieron una metodología cualitativa. Contribuye al conocimiento sobre los instrumentos de gestión ambiental en una jurisdicción particular de Argentina: la provincia de Buenos Aires (PBA). Tiene como punto de partida el reconocimiento de la importancia del trabajo interdisciplinar en la reflexión sobre la problemática ambiental y centra la atención por un lado, en las herramientas de gestión ambiental propuestas en dos campos de...

  9. Material tipo de la Colección de Herpetología del Museo de La Plata, Buenos Aires, Argentina

    OpenAIRE

    Ferraro, Daiana Paola; Williams, Jorge Daniel

    2005-01-01

    El Museo de la Plata (Buenos Aires, República Argentina) se fundó en 1889, y la colección herpetológica comenzó a funcionar poco tiempo después, bajo la responsabilidad deJulio G. Koslowsky. En esta contribución se listan los ejemplares tipo de Anfibios y Reptiles depositados en la colección herpetológica del Museo de La Plata. El material tipo depositado corresponde a 32 especies descriptas desde 1895 hasta la actualidad, incluyendo: 14 holotipos, 115 paratipos, 4 lectotipos, 22 paralectotip...

  10. Huerta agroecológica comunitaria en el Jardín de Infantes N° 904 del partido de Ensenada (provincia de Buenos Aires, Argentina)

    OpenAIRE

    Del Huerto, María del Carmen; Chaves, Natalia; Maldonado, José Antonio; Gonzales Andía, Eduardo; Farace, Mariano; Torres, Marian Nathalia; D'Agostino, Gino Gastón; Costello, Ana Paula; Arisvanarreta, Rocío; Zaffaroni, Agustina; Paoloca, Iván; Domínguez, Daniela; Vallejo Azar, Mariana Nahir; Maydup, María Luján; Bogino, María Leonor

    2015-01-01

    Desde marzo de 2011 se trabaja en Villa Catella (Pdo. de Ensenada, Provincia de Buenos Aires, Argentina) en la promoción de la salud y la soberanía alimentaria a través de la producción agroecológica de alimentos. Se emprendió una huerta en la Unidad Sanitaria Nº 80 y se inició otra en el Jardín de Infantes N°904 del mencionado barrio. Los participantes fueron los miembros de la comunidad educativa, integrada por los niños, docentes, autoridades, auxiliares, padres y vecinos. El mantenimiento...

  11. Pleistocene and holocene beaches and estuaries along the Southern Barrier of Buenos Aires, Argentina

    Science.gov (United States)

    Isla, Federico I.; Cortizo, Luis C.; Schnack, Enrique J.

    The Buenos Aires aggradation plain has a good record of Quaternary sea-level fluctuations. To the east of the Tandilia Range, the elevations of the Pleistocene beaches respond to the tectonic behaviour of the Salado Basin. Holocene beaches indicate a maximum transgression higher than 2 m. The low relief permitted an extended horizontal record of beach/chenier plains interfingered with estuarine environments (coastal lagoons, marshes) covered by a sandy (Eastern) barrier. Between the Tandilia and Ventania ranges, the location of Pleistocene and Holocene beaches are related to a former higher relief; i.e. they are attached to low-altitude cliffs and underneath cliff-top dunes composing the Southern Barrier. At Claromecó, Pleistocene gravel beaches, mostly composed of caliche pebbles, occur at heights between 4 and 7 m, and are overlying estuarine Pleistocene environments. Beaches of the same age are at a level of 10 m at Mar del Plata Harbour and Arroyo Sotelo (west of Mar Chiquita Lagoon). Holocene beaches found at Punta Mogotes and Costa Bonita are at higher altitudes than on the Eastern Barrier (ca. 2-4 m). The Holocene estuarine sequences are related laterally to present operating inlets (Las Brusquitas, La Ballenera, Quequén Grande, Claromecó, Quequén Salado). They are seldon thicker than 2.4 m, and comprise basal layers of black muds; towards the top, the layers are thinner, of coarser grain size and white colours. Grain-size analyses were performed comparatively on Pleistocene, mid-Holocene and present beaches. Sangamonian beaches aregravelly or coarser than medium sand (mean). Holocene beaches are usually coarser than medium sand, but dominantly shelly to the north of Mar del Plata, and composed of volcanic clasts to the south of this city. Modern beaches are dominated by fine sand, except at some erosive beaches between the Mar del Plata capes. They have a lesser content of shells than those of mid-Holocene.

  12. Characterization and health risk assessment of VOCs in occupational environments in Buenos Aires, Argentina

    Science.gov (United States)

    Colman Lerner, J. E.; Sanchez, E. Y.; Sambeth, J. E.; Porta, A. A.

    2012-08-01

    To detect volatile organic compounds (VOCs) in indoor air in small enterprises in La Plata city and surrounding areas, sampling was conducted using passive diffusion monitors (3M-3500) and analysis of the samples were performed byCG-FID. Analytic methodology was optimized for 23 VOCs (n-alkanes, cycloalkanes, aromatic and chlorinated compounds, ketones and terpenes compounds) by determining the recovery factor and detection limit for each analyte. Different recovery values were obtained by desorbing with a mixture of dichloromethane: methanol (50:50), with a standard deviation lower than 5%. Enterprise analyzed included chemical analysis laboratories, sewing workrooms, electromechanical repair and car painting centers, take away food shops, and a photocopy center. The highest levels of VOCs were found to be in electromechanical repair and car painting centers (hexane, BTEX, CHCl3, CCl4) followed by chemical analysis laboratories and sewing workrooms. Cancer and noncancer risks were assessed using conventional approaches (HQ and LCR, US EPA) using the benzene, trichloroethylene, chloroform for cancer risk, and toluene, xylene and n-hexane, for noncancer risks as markers. The results showed different LCR for benzene and trichloroethylene between the different indoor environments analyzed (electromechanical repair and car painting center ≫ others) and chloroform (laboratory > others), but comparing with the results obtained by other research, are in similar order of magnitude for equivalents activities. Similar finding were founded for HQ. Comparing these results with the worker protection legislation the electromechanical repair and car painting center and chemical analysis laboratories are close to the limits advised by OSHA and ACGIH. These facts show the importance of the use of abatement technologies for the complete reduction of VOCs levels, to mitigate their impact in the worker's health and their venting to the atmosphere.

  13. Especies de hongos formadores de Micorrizas Arbusculares: nuevas citas para la República Argentina Arbuscular mycorrhizal fungal species: new records for Argentina

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    G. Irrazabal

    2005-07-01

    Full Text Available Se investigó la presencia de hongos formadores de micorrizas arbusculares asociados a plantas colectadas en un agroecosistema y en un bosque nativo de tala, en la provincia de Buenos Aires. Las especies que constituyen un nuevo registro para la Argentina son: Scutellospora dipapillosa (Walker & Koske Walker & Sanders y Scutellospora fulgida Koske & Walker halladas en la rizósfera de Triticum aestivum L.; Scutellospora gilmorei (Trappe & Gerd. Walker & Sanders, en la rizósfera de Celtis tala Gill. Ex Planch., Scutia buxifolia Reiss. y plantas herbáceas; Acaulospora delicata Walker, Pfeiffer & Bloss. y Glomus clarum Nicolson & Schenck, halladas en ambos sitios. Estas especies son citadas, descriptas e ilustradas por primera vez para Argentina. Glomus etunicatum Becker & Gerdemann ha sido citada pero no descripta e ilustrada para nuestro país.The presence of arbuscular mycorrhizal fungi associated with plants from an agroecosystem and a native forest, in Buenos Aires province is studied. The species that correspond a new register for Argentina are: Scutellospora dipapillosa (Walker & Koske Walker & Sanders and Scutellospora fulgida Koske & Walker found in the rhizosphere of Triticum aestivum L.; Scutellospora gilmorei (Trappe & Gerd. Walker & Sanders, in the rhizosphere of Celtis tala Gill. Ex Planch., Scutia buxifolia Reiss. and herbaceous plants; Acaulospora delicata Walker, Pfeiffer & Bloss. and Glomus clarum Nicolson & Schenck, occurred in both sites. They are cited, described and illustrated for the first time from Argentina. Glomus etunicatum Becker & Gerdemann was previously cited although it was not described and illustrated from Argentina.

  14. Prospective multicenter study of community-associated skin and skin structure infections due to methicillin-resistant Staphylococcus aureus in Buenos Aires, Argentina.

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    María José López Furst

    Full Text Available BACKGROUND: Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA is now the most common cause of skin and skin structure infections (SSSI in several world regions. In Argentina prospective, multicenter clinical studies have only been conducted in pediatric populations. OBJECTIVE: PRIMARY: describe the prevalence, clinical and demographic characteristics of adult patients with community acquired SSSI due to MRSA; secondary: molecular evaluation of CA-MRSA strains. Patients with MRSA were compared to those without MRSA. MATERIALS AND METHODS: Prospective, observational, multicenter, epidemiologic study, with molecular analysis, conducted at 19 sites in Argentina (18 in Buenos Aires between March 2010 and October 2011. Patients were included if they were ≥ 14 years, were diagnosed with SSSI, a culture was obtained, and there had no significant healthcare contact identified. A logistic regression model was used to identify factors associated with CA-MRSA. Pulse field types, SCCmec, and PVL status were also determined. RESULTS: A total of 311 patients were included. CA-MRSA was isolated in 70% (218/311 of patients. Clinical variables independently associated with CA-MRSA were: presence of purulent lesion (OR 3.29; 95%CI 1.67, 6.49 and age <50 years (OR 2.39; 95%CI 1.22, 4.70. The vast majority of CA-MRSA strains causing SSSI carried PVL genes (95% and were SCCmec type IV. The sequence type CA-MRSA ST30 spa t019 was the predominant clone. CONCLUSIONS: CA-MRSA is now the most common cause of SSSI in our adult patients without healthcare contact. ST30, SCCmec IV, PVL+, spa t019 is the predominant clone in Buenos Aires, Argentina.

  15. PATOLOGÍAS PODALES EN GANADO LECHERO Y EN FEEDLOT DEL PARTIDO DE TANDIL, PROVINCIA DE BUENOS AIRES, ARGENTINA

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    O. E. Confalonieri

    2016-01-01

    Full Text Available Las patologías podales del bovino son multicausales; entre ellas se cuentan altos niveles de producción y estrés, así como etiologías ambientales, nutricionales, infecciosas, genéticas, razas, estado fisiológico y comportamiento, tanto animal como humano. Están adquiriendo gran importancia debido a la intensificación de la producción. El objetivo del presente trabajo fue determinar la prevalencia de enfermedades podales en explotaciones lecheras y en feedlot, así como comparar ambos sistemas de explotación en la región de Tandil, Buenos Aires, Argentina. A tal fin, se evaluaron 24 tambos en 2005 y un feedlot en 2013 en busca de patologías podales. Los animales que presentaron claudicación se separaron del rodeo y se examinaron clínicamente. Se calculó la prevalencia bruta y por patologías de mayor presentación en ambos tipos de explotación y, además, la proporción según miembro afectado. Se estimaron diferencias entre las prevalencias de cada tipo de producción por medio de Chi cuadrado (p < 0,05 y Razón de Prevalencia. La prevalencia en los 12.132 animales lecheros fue de 2,71% y en los 14.500 de feedlot de 0,57% (Razón de Prevalencia = 4,73; IC 95% = 3,72 a 6,02. La prevalencia de traumatismos en feedlot fue del 0,17% y en los tambos de 0,016% (p < 0,05; la de dermatitis digital fue de 0,69% en los tambos y en feedlot de 0,13% (p < 0,05, mientras la prevalencia de dermatitis interdigital alcanzó 0,81% en los tambos y 0,1% en feedlot (p < 0,05. En ambos sistemas de producción, los miembros más afectados fueron los posteriores (90,4% feedlot y 88,1% tambos. La menor prevalencia de patologías podales en feedlot podría deberse a la baja edad de los animales. No obstante, en los animales de feedlot hay una significativa mayor prevalencia en cuanto traumatismos que en los tambos, mientras que en estos se presentan más casos de dermatitis digital e interdigital.

  16. Percepción ambiental de productores agropecuarios y docentes rurales del partido de Arrecifes, Buenos Aires (Argentina

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    Graciela Maria Sardi

    2012-12-01

    Full Text Available En la región pampeana el avance de la agricultura sobre los suelos ganaderos, la incorporación de tecnología en la agricultura con creciente uso de agroquímicos y el deficiente manejo de efluentes en las producciones intensivas ganaderas, incrementan el riesgo de contaminación del agua. Se analizó la percepción ambiental de productores agropecuarios y docentes del ámbito rural del partido de Arrecifes (Buenos Aires, Argentina para planificar el desarrollo  de acciones de capacitación que puedan ser implementadas con cada uno de los grupos de actores sociales entrevistados. En un proyecto de gestión del agua (2001-2004 se recopiló información por medio de encuestas (2002 abarcando las siguientes temáticas: -Identificación de los principales problemas ambientales regionales, -Su ponderación por escala de gravedad, -Identificación de sus  consecuencias ambientales y  soluciones, - Percepción y conocimiento sobre los beneficios que aportan y perjuicios que afectan al agua superficial y subterránea, -Actitudes diarias que puedan perjudicar o favorecer la calidad del agua  e -Interés por recibir capacitación e información sobre los aspectos vinculados al cuidado y utilización de este recurso. Para el análisis de resultados se utilizó estadística descriptiva y  prueba de Fisher (?= 5%. Los encuestados (n=95 43.2 % productores 56.8 % docentes perciben problemas, proponen soluciones y actúan de acuerdo al grupo social al que pertenecen. Los productores poseen una mirada produccionista, ignorando las causas reales de la problemática del agua incriminando muchas veces a factores climáticos, como causantes de la degradación de los recursos naturales y proponiendo soluciones de índole educativas. Los docentes tienen una mirada más amplia y social, proponen soluciones económicas y tecnológicas, y creen que éstas son funciones privativas de los tomadores de decisiones.  Conocer la percepción de aquellos que hacen al

  17. Primera ictiofauna marina del Cretácico Superior (Formación Jaguel, Maastrichtiano de la provincia de Río Negro, Argentina First marine ichthyofauna from the Upper Cretaceous (Jaguel Formation; Maastrichtian from Río Negro province, Argentina

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    Sergio Bogan

    2010-01-01

    Full Text Available Se describe un conjunto de dientes fósiles que proceden de sedimentos marinos de la Formación Jagüel (Maastrichtiano, de la localidad de Bajo Trapalcó, provincia de Río Negro, Patagonia, Argentina. La ictiofauna aquí descripta es la primera para la Formación y se compone de unos seis taxones diferentes de Chondrichthyes (Serratolamna serrata, Squalicorax pristodontus, Cretalamna appendiculata, Carcharias sp., Odontaspis sp. y cf. Pseudohypolophus mcnultyi y dos Teleostei del género Enchodus (aff. E. ferox y aff. E. gladiolus. Serratolamna serrata es el taxón mejor representado del conjunto, y constituye la cita más austral conocida en la distribución de esta especie y el primer registro fósil para Argentina. Los registros de Enchodus, Squalicorax pristodontus y cf. Pseudohypolophus mcnultyi, representan las primeras descripciones de estos taxones para Argentina. Todos los taxones descriptos constituyen un ensamblaje de especies que caracterizan las paleoictiofaunas de los mares del Cretácico Superior de distintas partes del globo, aportando novedosa información para la comprensión de las ictiofaunas Mesozoicas del cono sur sudamericano.This paper describes several fossil teeth coming from marine sediments from the Bajo Trapalcó locality, Río Negro province, Patagonia, Argentina. The ichthyofauna described here is composed by six different chondrichtyan taxa (Serratolamna serrata, Squalicorax pristodontus, Cretalamna appendiculata, Carcharias sp., Odontaspis sp. and cf. Pseudohypolophus mcnultyi and two Teleostei of the genus Enchodus (aff. E. ferox and aff. E. gladiolus. Serratolamna serrata is the most abundant species, and it represents the southernmost record for the species and the first record for Argentina. The records of Enchodus, Squalicorax pristodontus and cf. Pseudohypolophus mcnultyi, constitute the first mention for these taxa in Argentina. The taxa described here characterize the paleoichthyofaunas of the Upper

  18. Material tipo de la Colección de Herpetología del Museo de La Plata, Buenos Aires, Argentina

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    Ferraro, Daiana Paola

    2005-12-01

    Full Text Available El Museo de la Plata (Buenos Aires, República Argentina se fundó en 1889, y la colección herpetológica comenzó a funcionar poco tiempo después, bajo la responsabilidad deJulio G. Koslowsky. En esta contribución se listan los ejemplares tipo de Anfibios y Reptiles depositados en la colección herpetológica del Museo de La Plata. El material tipo depositado corresponde a 32 especies descriptas desde 1895 hasta la actualidad, incluyendo: 14 holotipos, 115 paratipos, 4 lectotipos, 22 paralectotipos, 1 neotipo y 12 sintipos (sin incluir los ejemplares extraviados. Se proporciona, para cada taxón, la información completa referida a estatus de cada ejemplar tipo, sexo, datos de recolección y modificaciones taxonómicas posteriores. The La Plata Museum (Buenos Aires, República Argentina was founded on 1889, and after a little time, the herpetological collection started under the responsibility of Julio G. Koslowsky. In this paper the type specimens of Amphibia and Reptilia housed in the collection of the Herpetology Section at the La Plata Museum are listed. These type materials correspondto 32 species described since 1895 until nowadays, and include: 14 holotypes, 115 paratypes, 4 lectotypes, 22 paralectotypes, 1 neotype and 12 sintypes (this list does not include lost specimens. Complete data about taxonomic status, sex, collection data, and subsequent taxonomic changes are given for each taxon.

  19. Expanding the distribution of two species of mosquitoes (Diptera: Culicidae in Argentina and notes on their bionomics Ampliación de la distribución de dos especies de mosquitos (Diptera: Culicidae en Argentina y notas sobre su bionomía

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    Raúl E. Campos

    2011-12-01

    Full Text Available This paper reports the discovery of the mosquitoes Toxorhynchites haemorrhoidalis (Lynch Arribálzaga and Ochlerotatus milleri Dyar in Corrientes and Buenos Aires provinces respectively, thereby extending the geographical distribution of both species in Argentina.En esta nota, se informa el hallazgo de los mosquitos Toxorhynchites haemorrhoidalis (Lynch Arribálzaga y de Ochlerotatus milleri Dyar en la provincia de Corrientes y Buenos Aires respectivamente; con lo cual se amplía la distribución geográfica de ambas especies en Argentina.

  20. Salud mental y nuevas complementariedades terapéuticas. La experiencia en dos hospitales públicos de Buenos Aires, Argentina

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    María Mercedes Saizar

    2013-01-01

    Full Text Available En las últimas décadas las terapias alternativas se han convertido en una opción cada vez más frecuente entre la población general de las ciudades industrializadas, aunque su aceptación como opciones válidas en el sistema de salud aún se encuentra en discusión. A pesar de ello, en la Ciudad de Buenos Aires (Argentina han surgido talleres dentro de los hospitales generales que ofertan terapias alternativas/complementarias, asociadas a servicios o profesionales de la salud mental. A partir de un estudio cualitativo en dos hospitales públicos de la Ciudad Autónoma de Buenos Aires, indagaremos los motivos que dan origen a dicho fenómeno, destacando las formas de expresión que adquiere y la complejidad de un campo en construcción.

  1. Very long pahoehoe inflated basaltic lava flows in the Payenia volcanic province (Mendoza and la Pampa, Argentina Flujos de lava basáltica pahoehoe muy extendidos en la provincia volcánica Payenia (Mendoza y La Pampa, Argentina

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    Giorgio Pasquarè

    2008-03-01

    Full Text Available Extremely long basaltic lava flows are here presented and described. The flows originated from the great, polygenetic, fissural Payen Volcanic Complex, in the Andean back-arc volcanic province of Payenia in Argentina. The lava flows outpoured during the Late Quaternary from the summit rift of a shield volcano representing the first volcanic centre of this complex. One of these flows presents an individual tongue-like shape with a length of 181 km and therefore is the longest known individual Quaternary lava flow on Earth. Leaving the flanks of the volcano this flow reached the Salado river valley at La Pampa and, in its distal portion, maintained its narrow and straight shape without any topographic control over a flat alluvial plain. It has a hawaiite composition with low phenocryst content of prevailing olivine and minor plagioclase. Rare Earth element patterns are typical of Na-alkaline basalts, but incompatible trace element patterns and Sr -Nd isotope ratios, suggest a geodynamic setting transitional to the orogenic one. The flow advanced following the thermally efficient "inflation" mechanism, as demonstrated by a peculiar association of well developed morphological, structural and textural features. The temperature of 1130-1160°C and the viscosity of 3-73 Pa*s, calculated by petrochemical data, may be considered, together with a very low cooling rate and a sustained and long lasting effusion rate, the main causes of the extremely long transport system of this flow. Both the extreme length of the flow and the partial lack of topographic control may provide new constraints on the physics of large inflated flows, which constitute the largest volcanic provinces on Earth and probably also on the terrestrial planets.En este trabajo se presentan y describen flujos de lava extremadamente largos. Estos flujos se originaron en el complejo volcánico fisural Payen, dentro de la provincia volcánica Payenia en el retroarco andino. Los flujos de lava

  2. Transferencia de nutrientes del área de pastoreo a la de ordeño, en tambos semiextensivos en Buenos Aires, Argentina Nutrient transference from paddocks to milking area in grazing dairy farms in Buenos Aires, Argentina

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    M. A. Herrero

    2006-12-01

    Full Text Available En tambos pastoriles, los nutrientes presentes en las excretas reingresan al sistema con una distribución irregular, donde el área de ordeño resulta un sector de gran acumulación. El objetivo fue cuantificar los excedentes de nitrógeno y fósforo transferidos anualmente al área de ordeño según tiempos de permanencia (TP, en sistemas de producción lechera bovina en la provincia de Buenos Aires. Los excedentes se cuantificaron en 17 establecimientos a partir del cálculo de balances realizado por diferencia entre ingresos (nutrientes aportados por la ración total de la vaca en ordeño y egresos (leche producida. Para establecer el excedente real transferido al área de ordeño se consideró el TP diario real de los animales (ordeño y alimentación, y para definir el excedente de transferencia mínimo se estableció un TP óptimo de 4 horas/día. El 88% de los tambos evaluados presentó un TP mayor al óptimo. La prueba de Wilcoxon arrojó diferencias significativas (pIn grazing dairy farm systems, nutrients present in excreta return to the system with irregular distributions, with great accumulation in the milking area. The objective of this study was to quantify excess Nitrogen and Phosphorus (N&P transferred annually to the milking area according to permanency time (PT in this area, in bovine milk production systems in the Buenos Aires Province. Nutrient excess was quantified in 17 farms, based on the N&P balances estimated by the difference between inputs (nutrients provided by the total ration for milking cows and outputs (milk production. To establish the real excess of the balance that is transferred to the milking area, the real daily PT of the animals (milking and feeding was considered. An optimum PT was established in 4 hours/day to define the minimum transferred excess. The 88% of the farms evaluated presented a PT over the optimum. The Wilcoxon test showed significant differences (p<0.05 between the central values in both

  3. Chlorococcales nuevas para el embalse Paso de las Piedras (Buenos Aires, Argentina New Chlorococcales for Paso de las Piedras Reservoir (Buenos Aires, Argentine

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    Carolina Fernández

    2005-12-01

    Full Text Available En el presente trabajo se citan e ilustran 22 especies pertenecientes al orden Chlorococcales (Chlorophyceae, Chlorophyta halladas en el embalse Paso de las Piedras que representan nuevas citas para este ambiente. Pseudokirchneriella subcapitata, Tetraedron hemisphaericum y Scenedesmus semipulcher constituyen nuevas citas para la República Argentina.In this paper, we record and illustrate 22 species of Chlorococcales (Chlorophyceae, Chlorophyta found in Paso de las Piedras Reservoir, which are new records for this area. Pseudokirchneriella subcapitata, Tetraedron hemisphaericum and Scenedesmus semipulcher are new for Argentina.

  4. Assessment of air quality management policies in China with integrated model framework: Case study for Hebei province

    Science.gov (United States)

    Zhang, Q.; Zhao, Q.; Zheng, B.; Hong, C.; Tong, D.; Yang, W.; He, K.

    2015-12-01

    The Chinese government has pledged to clean urban air within five years from 2013 to 2017, to promote annual average PM2.5 concentration decline by 25%, 20% and 15% in the North China Plain, Yangtze River Delta and Pearl River Delta, respectively. The national targets are disaggregated into provinces, where region-specific action plan is designed and implemented by local government. It is particularly important to timely assess the effectiveness of local emission control measures and guarantee local efforts are in line with the national goal. We develop an integrated model framework for air quality management and policy evaluation, by integrating a dynamic high-resolution emission model, an emission scenarios analysis tool, and a 3-D air quality model. We then put the model system into pilot use in Hebei province for policy making to achieve the air quality target of 2017. We first integrate over 3000 point source facilities into this system to develop a high-resolution emission inventory. Upon the base emission dataset, the efforts to mitigate emissions with current and enacted measures are tracked and quantified to dynamic account of emission changes monthly. Strict policies are designed within the model framework through analyzing the potential to cut emissions for each point source. The finalized policy package can reduce emissions of major air pollutants by 20%-40%, respectively, leading to large decrease of ambient PM2.5 concentration.

  5. Stenomicra (Diptera: Opomyzoidea) in Argentina, with information on the biology of the genus Stenomicra (Diptera: Opomyzoidea) en Argentina, con información sobre la biología del género

    OpenAIRE

    Campos, Raúl E.; María C Gramajo; Mercedes Lizarralde de Grosso

    2010-01-01

    This is the first literature record of the genus Stenomicra Coquillett (Diptera: Periscelididae) from South America (Neotropical Region). New information on the biological cycle of Stenomicra species in the wild is provided, and four species of the genus Eryngium L. (Apiaceae) are recorded as host plants for immature stages of this taxon. The specimens of Stenomicra sp. were collected in Sierra de la Ventana, Buenos Aires province, Argentina.En este estudio, se publica por primera vez para Su...

  6. The reconstruction and climatic implication of an independent palaeo ice cap within the Andean rain shadow east of the former Patagonian ice sheet, Santa Cruz Province, Argentina

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    Wolff, Ingo W.; Glasser, Neil F.; Hubbard, Alun

    2013-03-01

    This paper describes the reconstruction of the previously undocumented Meseta Cuadrada palaeo ice cap on south-west Meseta del Lago Buenos Aires, Santa Cruz Province, Patagonia. Based on theoretical surface profiles the reconstruction of the Meseta Cuadrada Palaeo Ice Cap indicates an ice mass covering at least 78 km2 with a total ice volume around 9.2 km3. The inferred equilibrium line altitude (ELA) of the palaeo ice cap (2031 m asl) represents a drop of 286 m compared to the ELA of the current Meseta Cuadrada glacier (~ 2317 m asl). We explain this small change in ELA with reference to the flat hypsometry of the palaeo ice cap and an enhanced aridity to the west of the Patagonian Andes caused by the existence of the Last Glacial Maximum (LGM) Patagonian ice sheet. Calculated annual accumulation values of ca. 402 to 957 mm/a at the ELA of the Meseta Cuadrada palaeo ice cap derived by a degree day model (DDM) during the last local glacial maximum extent are low compared with estimations of the current accumulation at the ELA of the remaining glacierized area of around 3789 mm/a. This strongly supports the existence of increased aridity and seasonality east of the Patagonian Andes during the Last Glacial Maximum, provided both maximum extents were synchronous.

  7. PRIMER REGISTRO PREHISPÁNICO DE OBSIDIANAS EN EL PIEDEMONTE MERIDIONAL DE LA PROVINCIA DE TUCUMÁN (ARGENTINA: ANÁLISIS TECNOLÓGICO Y DE PROCEDENCIA / First pre Hispanic record of obsidian in the southern foothill of the Tucuman province (Argentina: tech

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    Gabriel Eduardo Miguez

    2015-06-01

    Full Text Available En este trabajo se presentan los resultados del estudio realizado sobre restos de obsidiana, los cuales constituyen los primeros registrados en contextos arqueológicos de las selvas meridionales de la provincia de Tucumán. Estos materiales fueron recuperados en capas estratigráficas del primer milenio D.C. correspondientes al sitio Santa Rosa, el cual se ubica en la base de las laderas orientales de la Sierra del Aconquija (Tucumán, Argentina. Se realizó un análisis técnico-morfológico de los especímenes, en conjunto con un análisis geoquímico mediante fluorescencia de rayos X (FRX para determinar la procedencia geográfica de los materiales de obsidiana. Los resultados determinaron que la materia prima de la muestra, compuesta exclusivamente por desechos de talla, procede de la cantera de Ona-Las Cuevas, la cual se ubica a ca.270 km al noroeste del sitio Santa Rosa, en el norte de la provincia de Catamarca, en la Puna meridional argentina. La gran distancia sitio-cantera nos lleva a proponer que las comunidades prehispánicas de estas tierras bajas habrían participado de esferas estables de interacción con grupos de áreas muy distantes, propiciando la circulación e intercambio de obsidianas dentro de la porción meridional del NO de Argentina. Abstract In this paper we present the results of the study conducted on obsidian specimens, which constitutes the first record of this kind in archaeological contexts of the southern forests of the province of Tucumán are presented. These materials were recovered in stratigraphic layers of the first millennium AD of the Santa Rosa site, which is located at the base of the eastern slopes of the Sierra del Aconquija (Tucumán, Argentina. A techno-morphological analysis of specimens in conjunction with geochemic alanalysis using X-ray fluorescence (XRF was performed to determine the geographical provenance of obsidian archaeological materials. Results determined that the sample raw material

  8. «Batir bandera»: las emociones en los debates sobre género y clientelismo en Argentina

    OpenAIRE

    Tabbusch, Constanza

    2016-01-01

    This article examines how emotions are understood, in deeply gendered ways, within gender and clientelism debates in Argentina. By looking at the case study of the voluntary network of neighborhood representatives of Plan Vida, which distributes food aid in the Province of Buenos Aires, I distinguish two ways of conceiving affects in grassroots women’s political participation. While the first one emphasizes the management of the external expression of emotions as part of doing politics, the s...

  9. China Looks to Argentina to Grow Food

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    @@ It might sound perverse for a Chinese company to go halfway round the globe to grow soya and other crops on unproductive land in a dry corner of Argentina. Yet that is what Beidahuang Group, a state-owned farm company based in the north-eastern Chinese province of Heilongjiang, is doing in the Pa-tagonian province of Rio Negro.

  10. Comments on Environmental and Sanitary Aspects of the Scorpionism by Tityus trivittatus in Buenos Aires City, Argentina

    OpenAIRE

    Adolfo Rafael de Roodt

    2014-01-01

    Deaths by venomous animals are medical emergencies that can lead to death and thus constitute sanitary problems in some regions of the world. In the South of America, the accidents by these animals are a common sanitary problem especially in warm, tropical or subtropical regions, related with rural work in several countries. Argentina is located in the extreme South of South America and a minor part of the continental surface is in tropical or subtropical regions, where most of the accidents...

  11. First record of the genus Typhlocybella (Hemiptera: Auchenorrhyncha: Typhlocybinae: Dikraneurini from Argentina Primer registro del género Typhlocybella (Hemiptera: Auchenorrhyncha: Typhlocybinae: Dikraneurini para Argentina

    Directory of Open Access Journals (Sweden)

    María I. Catalano

    2008-12-01

    Full Text Available The genus Typhlocybella Baker is quoted for first time for Argentina from specimens collected on maize crops in Buenos Aires, Mendoza, Córdoba and Tucumán provinces. This contribution adds taxonomic and bioecologic knowledge about the genus as well as observations about the leaf damage produced on this crop.El género Typhlocybella Baker se cita por primera vez para la Argentina a partir de ejemplares recogidos sobre cultivos de maíz en las provincias de Buenos Aires, Mendoza, Córdoba y Tucumán. En esta contribución se reúne información relevante acerca de los aspectos taxonómicos y bioecológicos del género, y se adicionan observaciones acerca de los daños foliares que provocan sobre el mencionado cultivo.

  12. The local scale, from the periphery. An analysis of the agriculture machinery industry in Las Parejas (province of Santa Fe, Argentina, in connection withits its context in the Argentine economy

    Directory of Open Access Journals (Sweden)

    Patricio Narodowski

    2007-01-01

    Full Text Available This paper looks into the possibilities that local development strategies inspired in the reality of European countries may be applied to peripheral countries such as Argentina. A difference is made between a global/national context and a local one. the analysis takes into account geographical, sociological and economic discourses which, considering the Italian and French experience, among others, relativize the national scale as the axis of analysis and focus on the local birth as scale of reference. The agricultural machinery businesses of Las Parejas, in the province of Santa Fe, are used to exemplify how a medium-sized city can generate associative projects which help actors to deal with the context, though this is still a business performance and local productive networks life variable.

  13. [Biocultural study of infant malnutrition of primary cause in the urban setting of La Plata, Buenos Aires Province, Argentina].

    Science.gov (United States)

    Ortale, S; Rodrigo, M A

    1996-06-01

    The present study, of microsocial nature, attempts to recover the biology-culture unity in the analysis of child undernutrition. A sample was selected of 52 children with primary undernutrition and their families, from the population attending the Nutritional Rehabilitation Unit of La Plata Children Hospital. The specific index was used to measure the low socioeconomic level in families with undernourished children. The mothers were interviewed to obtain information on the perception and recognition of undernutrition. Observation and interviews to the medical staff were performed in ten centers of primary health care (PHC), in order to reveal the medical practices related to this problem. The results obtained showed that the studied families conjugated the most unfavorable life conditions within poverty. Children with adequate weight at birth were nutritionally affected between 3 and 18 months of age, leading to height disorders. The representations and practices sustained by the mothers, relating undernutrition to a popular disease named "pata de cabra" lead to limitations in treatment. In PHC centers, conceptual and operative limitations are recorded for its detection and early treatment. It is concluded that cultural factors present in the two most directly related agents to child health (the mother and the PHC center) do not allow to modify the environmental effects that prematurely affect the children of poverty.

  14. Maps, imaginary and environmental memory in Argentina

    Directory of Open Access Journals (Sweden)

    Verónica Hollman

    2014-08-01

    Full Text Available While research on social ideas of nature focused on the discursive side of environmental rhetoric during the last decade of the twentieth century, the visual turn has introduced the analysis of its visual facet: the study of the visual representation of nature in photographs, films, paintings and media among many other image-based media. However, scarce attention has received the study of what is provoked by environmental images as well as how they shape our imagination and memory of environmental issues. Based on the analysis of mental maps created by 215 subjects -all of them students of the undergraduate programs of the Faculty of Humanities at Universidad Nacional del Centro de la Provincia de Buenos Aires Province (Argentina in 2013- as the starting point to identify images that have become constitutive environmental memory, the article discusses the role of environmental images in shaping both our ways of looking to nature and our understanding of environmental issues.

  15. Coleópteros acuáticos y semiacuáticos del Parque Provincial Ernesto Tornquist (Provincia de Buenos Aires, Argentina

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    Liliana A. FERNÁNDEZ

    2010-01-01

    Full Text Available Se presenta el primer relevamiento de coleópteros acuáticos y semiacuáticos del Parque Provincial Ernesto Tornquist. El material entomológico estudiado se obtuvo durante las campañas de recolección de insectos acuáticos, realizadas entre los años 2005 y 2007, en las cuatro estaciones del año. Los ambientes estudiados fueron los arroyos Ventana, El Loro, Sauce Grande y dos charcos temporarios. Se identificaron en total 5.200 ejemplares pertenecientes a 9 familias, 20 géneros y 34 especies. Se brinda el listado de las especies y su distribución en la Argentina. Se citan, por primera vez para el parque, 23 especies y por primera vez para la Provincia de Buenos Aires: Austrelmis sp. e Hydrochus stolpi Germain.

  16. {sup 21}Pb dating of sediments in a heavily contaminated drainage channel to the La Plata estuary in Buenos Aires, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Di Gregorio, D.E. [Departamento de Fisica, Comision Nacional de Energia Atomica, Av. Gral. Paz 1499, 1650 San Martin, Provincia de Buenos Aires (Argentina) and Escuela de Ciencia y Tecnologia, Universidad Nacional de Gral. San Martin, Martin de Irigoyen 3100, 1650 San Martin, Provincia de Buenos Aires (Argentina)]. E-mail: digregorio@tandar.cnea.gov.ar; Fernandez Niello, J.O. [Departamento de Fisica, Comision Nacional de Energia Atomica, Av. Gral. Paz 1499, 1650 San Martin, Provincia de Buenos Aires (Argentina); Escuela de Ciencia y Tecnologia, Universidad Nacional de Gral. San Martin, Martin de Irigoyen 3100, 1650 San Martin, Provincia de Buenos Aires (Argentina); Huck, H. [Departamento de Fisica, Comision Nacional de Energia Atomica, Av. Gral. Paz 1499, 1650 San Martin, Provincia de Buenos Aires (Argentina); Escuela de Ciencia y Tecnologia, Universidad Nacional de Gral. San Martin, Martin de Irigoyen 3100, 1650 San Martin, Provincia de Buenos Aires (Argentina); Somacal, H. [Escuela de Ciencia y Tecnologia, Universidad Nacional de Gral. San Martin, Martin de Irigoyen 3100, 1650 San Martin, Provincia de Buenos Aires (Argentina); Curutchet, G. [Escuela de Ciencia y Tecnologia, Universidad Nacional de Gral. San Martin, Martin de Irigoyen 3100, 1650 San Martin, Provincia de Buenos Aires (Argentina)

    2007-01-15

    Concentrations of {sup 21}Pb and {sup 137}Cs in sediment samples collected from two cores at a drainage channel to the La Plata river estuary in Buenos Aires, Argentina, were measured using ultralow-background detection systems. The {sup 21}Pb data were used to determine the rate of sediment accumulation of the sites. These results were correlated with some heavy metal (chromium and lead) concentrations of the samples in an attempt to characterize the historical input of contaminants due to the industrial development, which has taken place in this area over the last century. The {sup 137}Cs measurements demonstrate that cesium dating is not adequate in regions of the southern hemisphere.

  17. International Uranium Resources Evaluation Project (IUREP) national favourability studies: Argentina

    International Nuclear Information System (INIS)

    Argentina is a predominantly lowland area of 2,789,240 square kilometers. The capital is Buenos Aires. The entire length of Argentina is bordered on the west by the Andes Mountains. Tile Northwest Andes-Piedmont region consists of deep valleys containing salt basins and volcanoes, and is an earthquake zone. Patagonia, in the south, is essentially an arid region of windy plateaus and valleys. The southern Andes are narrower and lower than the northern Andes and in the extreme south contain glaciers and ice fields. The east-central plain (Pampa) of Argentina has dry and humid sectors and contains most of the population. The largest rivers are chiefly in the northeast, many having only seasonal flow. There has been extensive surface and subsurface exploration for uranium in Argentina for over 20 years. Although most of the work has been performed by the CNEA, advisors from the U.S. and from the IAEA have also taken part. Private industry has been involved, but apparently only on a small scale. In the OECD report of 1970, it was stated that 400,000 square kilometers of Argentina appear very favorable for uranium while an additional 900,000 square kilometers offer fair possibilities. Uranium exploration to date suggests that sandstones of Permian and Cretaceous ages exposed in Western Argentina in the Cordillera are very promising for discovery of new deposits. Past CNEA estimates have indicated that there is considerable hope for new discoveries in those areas where reserves are now known. In addition to the known uraniferous provinces which are indeed favorable for further exploration, there are several other large areas that warrant attention. There are, for example, in the Santa Cruz area of about 15,500 square kilometers Cretaceous and Tertiary sediments with favorable facies for uranium deposition. In the Patagonia Cordillera, Jurassic, Cretaceous, and Tertiary sediments are of interest for prospecting, These rocks contain carbonaceous material and have been

  18. Sedimentitas marinas de la Formación Barranca Final (Mioceno medio-superior de la cuenca del Colorado, aflorantes en el sureste de la provincia de La Pampa, Argentina Marine sediments of the Barranca Final Formation (Middle-Upper Miocence of the Colorado Basin in south-east La Pampa province, Argentina

    Directory of Open Access Journals (Sweden)

    G. Visconti

    2003-06-01

    Full Text Available En este trabajo se describen sedimentitas carbonáticas, silicoclásticas y evaporíticas del Mioceno de la cuenca del Colorado, aflorantes en el sureste de la provincia de La Pampa, Argentina. Sobre la base de la litología, las estructuras sedimentarias y los fósiles se identificaron siete facies y dos asociaciones de facies, correspondientes a ambientes marino somero (intermareal a supramareal y fluvial, para las secciones analizadas. Las sedimentitas marinas infrayacen a las areniscas fluviales de la Formación Río Negro y se consideran correlacionables con las sedimentitas de la Formación Barranca Final (Mioceno medio-superior, depositadas en la cuenca del Colorado durante la transgresión "Entrerriense". El hallazgo de estos niveles confirma la presencia de este mar en el sureste de la provincia de La Pampa.This paper describes Miocene carbonatic, siliciclastic and evaporitic sedimentary rocks of the Colorado Basin, from southeast of La Pampa Province, Argentina. Seven facies and two facies assemblages of shallow marine (intertidal and supratidal settings and fluvial environments are inferred on the basis of lithology, sedimentary structures, and fossil content. The thin marine level underlies the fluvial sandstones of the Río Negro Formation, and is considered contemporary with the Barranca Final Formation (middle-upper Miocene, of the Colorado Basin, which is the depositional record of the "Entrerriense" transgression. The occurrence of these sedimentary rocks confirms the presence of the "Entrerriense" sea in the south-east of La Pampa Province during the Miocene.

  19. Tick paralysis cases in Argentina

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    Carlos Remondegui

    2012-08-01

    Full Text Available Tick paralysis (TP occurs worldwide and is caused by a neurotoxin secreted by engorged female ticks that affects the peripheral and central nervous system. The clinical manifestations range from mild or nonspecific symptoms to manifestations similar to Guillain-Barré syndrome, bulbar involvement, and death in 10% of the patients. The diagnosis of TP is clinical. To our knowledge, there are no formal reports of TP in humans in South America, although clusters of TP among hunting dogs in Argentina have been identified recently. In this paper, clinical features of two cases of TP occurring during 1994 in Jujuy Province, Argentina, are described.

  20. Cyanophyceae Epipélicas de la Marisma "El Cangrejal" en el estuario de Bahía Blanca (Buenos Aires, Argentina Epipelic Cyanophyceae of the salt marsh «El Cangrejal» in the estuary of Bahía Blanca (Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Constanza Da Rodda

    2005-12-01

    Full Text Available En la marisma de las planicies de marea limo-arcillosas del estuario de Bahía Blanca (Buenos Aires se ubica "El cangrejal", una asociación de Sarcocornia perennis y Chasmagnathus granulata. En la interfase sedimento-agua se forman matas microbianas constituidas principalmente por cianofíceas y diatomeas. Se estudiaron las Cyanophyceae epipélicas presentes en dichas matas, identificándose veintitres taxa correspondientes a los Órdenes Chroococcales (1 y Hormogonales (22. Las especies halladas son nuevas citas para el área en estudio, a excepción de Microcoleus chthonoplastes y Oscillatoria limosa. Symploca hydnoides f. minor se cita por primera vez para Argentina.«El Cangrejal», an association of Sarcocornia perennis and Chasmagnathus granulata is situated in the salt marsh of slime-clay tide plains of the estuary of Bahía Blanca (Buenos Aires. In the sediment-water interface microbial mats are mainly constituted by cyanophytes and diatoms. This is a study of the epipelics Cyanophyceae presents in these mats, identifying twenty three taxa corresponding to the Orders Chroococcales (1 and Hormogonales (22. The species are new mention for the study area, an exception are Microcoleus chthonoplastes and Oscillatoria limosa. Symploca hydnoides f. minor is a new record for Argentina.

  1. Magnetismo ambiental en un paleosuelo desarrollado en la Formación Luján (Luján, provincia de Buenos Aires: Comparación con otras áreas de la provincia; consideraciones paleoclimáticas Environmental magnetism of a paleosoil in the Lujan Formation (Luján, Buenos Aires Province: comparison with other areas in the province and palaeoclimatic considerations

    Directory of Open Access Journals (Sweden)

    M. J. Orgeira

    2002-12-01

    Full Text Available Se efectuó un estudio de magnetismo ambiental en sedimentos postpampeanos, principalmente fluviales, asignados a la Formación Lujan (localidad tipo, Luján, provincia de Buenos Aires, Argentina. La informacion surgida de las muestras recolectadas sugieren un fenómeno de disolución de los minerales ferromagnéticos detríticos durante el proceso edáfico. De la comparación de los resultados magnéticos obtenidos en paleosuelos y suelo holocenos labrados en "sedimentos postpampeanos" eólicos y fluviales (Fm. Luján y La Postrera, surge que existe una señal magnética característica en todos ellos. Asimismo, esta señal es consistente con la obtenida en sedimentos loéssicos pampeanos asignados a la Fm. Buenos Aires. El fenómeno de disolución de minerales ferrimagnéticos detríticos es generalizado en el área chacopampeana. Sin embargo, este proceso puede asociarse a ulterior génesis de una fracción superparamagnética (SP, la que podría indicar una estación con importante deficiencia hídrica durante el evento climático. Por último, también se ha observado la asociación del fenómeno de disolución a la génesis de una fracción mineralógica de alta coercitividad, análogos a los encontrados en paleosuelos formados en loess pampeano .An environmental magnetic study of mainly fluvial "postpampean sediments" assigned to the Lujan Formation (Luján, Buenos Aires Province, Argentina was carried out. The results obtained suggest a depletion of detrital ferromagnetic minerals during the pedogenetic processes. A characteristic magnetic signal can be distinguished in Holocene paleosols and soils of both eolian and fluvial "post-Pampean sediments" (Fm. Luján and Fm. La Postrera. This signal is analogous to that determined in loessic Pampean sediments assigned to the Buenos Aires Formation. It is inferred that the depletion of detrital ferromagnetic minerals is a general process in the Chacopampean area. This process may be associated

  2. El registro de Lestodelphys Tate, 1934 (Didelphimorphia, Didelphidae en el Pleistoceno tardío del noreste de la Provincia de Buenos Aires, Argentina

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    Agustín G. Martinelli

    2013-01-01

    Full Text Available Nuevos registros de Lestodelphys sp. (Marsupialia: Didelphimorphia: Didelphinae: Thylamyini son registrados en la base del Miembro Eloisa, Formación Río Luján (Pleistoceno tardío, provenientes de tres sitios localizados sobre la margen derecha de la ribera del Río Reconquista, Partido de Merlo, noreste de la Provincia de Buenos Aires (Argentina. Estos materiales constituyen los registros más boreales de Lestodelphys para la Provincia de Buenos Aires. Los registros consisten en cuatro mandíbulas. Estos tienen una combinación de caracteres que sugieren que (1 la especie fósil L. juga posee una alta variabilidad morfológica, por lo tanto la diagnosis actual debe ser revisada; o, (2 la validez de L. juga debiera no ser considerada, como fue sugerido por autores previos. El registro de Lestodelphys es utilizado como indicador ambiental ya que la especie viviente se registra en ambientes áridos a semiáridos. La presencia de los nuevos materiales en el Pleistoceno de Merlo refuerza las inferencias ambientales previamente mencionadas para los depósitos portadores.

  3. LINAJES MASCULINOS Y SU DIVERSIDAD EN COMUNIDADES WICHÍ DE FORMOSA / Male lineages diversity in Wichí communities of Formosa province, Argentina

    OpenAIRE

    Virginia Ramallo; María Rita Santos; Marina Muzzio; Josefina María Brenda Motti; Susana Salceda; Graciela Bailliet

    2009-01-01

     Durante el año 2005, se realizaron dos viajes de campaña a comunidades Wichí cercanas a las localidades de Ingeniero Juárez y Laguna Yema (provincia de Formosa, Argentina), como parte del proyecto multidisciplinario “De las historias étnicas a la prehistoria en el Gran Chaco”. Partiendo del planteo metodológico de unidad poblacional, se obtuvieron datos genéticos en 93 muestras utilizando marcadores binarios y microsatélites del cromosoma Y, determinando haplogrupos y haplotipos masculino...

  4. El patrimonio industrial-minero como recurso turístico cultural: El caso de un pueblo-fábrica en Argentina

    OpenAIRE

    Fernández, Guillermina; Guzmán Ramos, Aldo

    2004-01-01

    The valuation of the heritage on the part of the society is fundamental, because it allows to understand of where we come and towards where we go. Within the cultural heritage, a category exists that is the industrial heritage. The present I articulate must like objective diagnose the possibilities of developing to a program of cultural tourism from the existing industrial heritage in the locality of Villa Cacique - Barker, in the Southeast of the Province of Buenos Aires (Argentina), this wo...

  5. La Argentina inconclusa (2012) : Juan Archibaldo Lanús. Páginas: 719. El Ateneo, Buenos Aires.. ISBN: 9789500206662

    OpenAIRE

    Suárez Saponaro, Jorge Alejandro

    2013-01-01

    El autor recorre la historia argentina desde Mayo hasta el 2009, indagando sobre los factores que impidieron que la Argentina se transformara en un estado desarrollado, con políticas de largo plazo, previsible. En este excepcional trabajo político histórico se toca la política exterior argentina. (Párrafo extraído del texto a modo de resumen)

  6. Cubiertas de auto abandonadas como sitios de cría de Culex eduardoi (Diptera: Culicidae en el Parque Provincial Pereyra Iraola, Provincia de Buenos Aires Discarded car tires as breeding sites of Culex eduardoi (Diptera: Culicidae in the Pereyra Iraola Provincial Park, Buenos Aires Province

    Directory of Open Access Journals (Sweden)

    Alejandra Rubio

    2011-06-01

    Full Text Available El conocimiento sobre la fauna de mosquitos que se cría en cubiertas de auto es realmente escaso en Argentina. El objetivo de este estudio fue caracterizar una población de inmaduros de Culex eduardoi Casal & Garcia en una acumulación de cubiertas abandonadas en un bosque suburbano de la Provincia de Buenos Aires. Entre noviembre 2009 y mayo 2010, se recolectaron mensualmente larvas de mosquitos en 27 cubiertas de auto abandonadas en un sector boscoso del Parque Provincial Pereyra Iraola. Se recolectaron en total 1.009 larvas del tercer y cuarto estadio de Cx. eduardoi, y el índice de contenedores (IC global fue 66,3% (106/160. Culex eduardoi estuvo presente durante todos los meses, aunque el IC difirió significativamente (x²(6 = 15,11; p The knowledge about tire-breeding mosquitoes is truly scarce in Argentina. The objective of this study was to characterize a population of immatures of Culex eduardoi Casal & Garcia, from a pile of abandoned tires located in a suburban forest of Buenos Aires Province. Between November 2009 and May 2010, mosquito larvae were monthly collected in 27 abandoned tires within a woody area of the Parque Provincial Pereyra Iraola. A total of 1009 third and fourth instar larvae of Cx. eduardoi were collected, and the overall container index (CI was 66.3% (106/160. Culex eduardoi was collected every month but the CI differed significantly (x²(6 = 15.11; p < 0.05, reaching maximum values in November and December (76 and 92.5% respectively. In spring, the relative abundance of larvae was also the highest, and the mean number of larvae collected per habitat was 9.5 (min. 3.5 in March; max.15.1 in November. Other mosquito species such as Cx. pipiens Linneo and Toxorhynchites theobaldi Dyar & Knab were also found in the studied containers. The present findings contribute with novel knowledge on culicids of tires in Argentina.

  7. Contribución al conocimiento de los reservorios del Trypanosoma cruzi (Chagas,1909 en la Provincia de Corrientes, Argentina Contribution to knowledge of reservoirs of Trypanosoma cruzi (Chagas, 1909 in Corrientes Province, Argentina

    Directory of Open Access Journals (Sweden)

    María Esther Bar

    1999-06-01

    Full Text Available Con el propósito de identificar a reservorios del Trypanosoma cruzi se investigaron 60 mamíferos en los Departamentos Capital y San Luis del Palmar. Se examinaron: primates, roedores, marsupiales, carnívoros y edentados; 40 vivían en cautiverio y 20 fueron capturados mediante trampas en una comunidad rural forestal. Los mamíferos fueron analizados por xenodiagnóstico, empleándose ninfas de 3o o 4o estadío de Triatoma infestans ayunadas durante 2 semanas. Las heces de los triatominos fueron observadas al microscopio (400x a los 30, 60 y 90 días post-alimentación. En 2 Saimiri sciureus y en 1 Cebus apella se constató infección por tripanosomas cruziformes. Se concluye que la parasitemia detectada fue baja. La presencia de Didelphis albiventris, reservorio potencial del Trypanosoma cruzi , en una zona de transmisión activa del parásito representa un factor de riesgo, por lo que son necesarias futuras investigaciones epidemiológicas para determinar la real diagnosis de esta parasitosis en la provincia de Corrientes, Argentina.In order to identify Trypanosoma cruzi reservoirs in transmission areas, 60 mammals in Capital and San Luis del Palmar Departments, Corrientes, Argentina were studied. Primates, rodents, carnivores, marsupials and edentates were investigated, 40 of them living in captivity and 20 caught with traps in a rural area. The mammals were examined by xenodiagnosis and third or fourth instars nymphs of Triatoma infestans starved for 2 weeks were used. The feces were microscopically observed (400x for Trypanosoma cruzi infection at 30, 60 and 90 days after feeding. Trypanosoma cruzi-like parasites were identified in 2 Saimiri sciureus and 1 Cebus apella analyzed by xenodiagnosis. It was concluded that parasitemia was low. Howewer, the presence in a forest area of Didelphis albiventris, potential reservoir of the parasite, indicates a risk factor and deserves further epidemiological study for a true diagnosis of this

  8. Tafonomía sobre asociaciones de vertebrados registradas en trampas fluviales de la Región Pampeana (Buenos Aires, Argentina

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    Pomi, L. H.

    2008-12-01

    Full Text Available We describe a new taphonomic mode from a fluvial system developed in channel terraces located at the Pampean Region (Quequén Grande River, Buenos Aires, Argentina associated with natural vertical cavities («marmits». We analyzed a recent (mainly aquatic vertebrate assemblage accumulated in these cavities, which operate as bone traps. Our observations suggest that these traps have accumulated isolated specimens and live or dead complete individuals during high hydric regime (torrential rains. Skeletal part representation indicates that exists a bone selection. We compare the element differential survey with different variables (structural bone density, original representation in a skeleton, size, form and volume, concluding that selection was associated with floating capabilities of missing bones (e.g. vertebrae.Se da a conocer un nuevo modo tafonómico reconocido en un sistema fluvial ubicado en la Región Pampeana (provincia de Buenos Aires, Argentina. Éste se encuentra asociado a cavidades verticales (marmitas desarrolladas en terrazas del canal principal del río Quequén Grande. Se estudió una asociación de vertebrados actuales (en su mayoría de hábitos acuáticos acumulados en estas cavidades, las cuales actuaron como trampas para los especímenes. El estudio de la muestra y observaciones realizadas in situ, sugieren que dicha trampa acumuló individuos completos (vivos o muertos y especímenes aislados durante eventos de alto régimen hídrico (lluvias torrenciales. La representación de partes anatómicas indica una selección de elementos. Se comparó la supervivencia diferencial de cada elemento con diferentes variables (densidad ósea estructural, representación original en el esqueleto, tamaño, forma y volumen, concluyendo que la selección observada se produjo por la capacidad de flotación de los elementos ausentes (p. ej., vértebras.

  9. [Campylobacter spp.: prevalence and pheno-genotypic characterization of isolates recovered from patients suffering from diarrhea and their pets in La Pampa Province, Argentina].

    Science.gov (United States)

    Tamborini, Ana L; Casabona, Luis M; Viñas, María R; Asato, Valeria; Hoffer, Alicia; Farace, María I; Lucero, María C; Corso, Alejandra; Pichel, Mariana

    2012-01-01

    The prevalence of Campylobacter spp. was investigated in 327 patients suffering from diarrhea and in 36 animals (dogs, cats and chickens) owned by the patients that presented infection by Campylobacter in Santa Rosa, La Pampa, Argentina. Campylobacter spp. was isolated in 50/327 patients and in 12/36 animals, being Campylobacter jejuni the most common species. Resistance to ciprofloxacin (65 %) and tetracycline (32 %) was found among 35 isolates of human origin studied. Seven genetic subtypes were observed among 13 C. jejuni isolates by pulsed field gel electrophoresis. Two subtypes grouped isolates belonging to patients and their respective dogs whereas another subtype grouped one isolate of human origin and two isolates from the patient's chickens. The results of this investigation highlight the need to strengthen surveillance of Campylobacter spp. not only in poultry, which is recognized as the main reservoir, but also in pets, which were shown to be asymptomatic carriers of the pathogen. PMID:23267623

  10. Utilization of research reactor to the environmental application in Thailand. Air quality study in Saraburi Province, central Thailand

    International Nuclear Information System (INIS)

    Saraburi Province is facing difficulties due to high dust generating Industries which is the major economy of the area. Thus, the elemental composition of SPMs in Tumbon Na Phra Lan, Saraburi Province is being monitored. The samples were collected in each quarter from May 2005 to March 2006. Soil as well as fine particles from stacks of some selected manufacturers were also analyzed. The average weight of SPM was found lowest in wet season and highest in the middle of dry season. The average weight of SPM is also high in dry season and low in wet season. The elements found in the samples are Na, Mg, Al, As, Sr, Br, Si, P, S, Cl, K, Ca, Ti, V, Mn, Fe, Co, Cu, and Zn. Calcium is selected as the key elements since most postulated source of pollution is due industrial utilization of the limestone deposit. It is observed that the fine partials form stack are quite low which mean an effective emission control of fine particles form the selected manufacturers. The data is being utilized by the Pollution Control Department, Ministry of Natural Resources and Environment, the environmental authority in Thailand. The authority will use this data to find possible solution for air quality improvement of the area. Future collaboration with environmental authority will be on the study of Thalenoi conservation area in the southern part of Thailand. (author)

  11. Aerosol properties and meteorological conditions in the city of Buenos Aires, Argentina, during the resuspension of volcanic ash from the Puyehue-Cordón Caulle eruption

    Science.gov (United States)

    Graciela Ulke, Ana; Torres Brizuela, Marcela M.; Raga, Graciela B.; Baumgardner, Darrel

    2016-09-01

    The eruption in June 2011 of the Puyehue-Cordón Caulle Volcanic Complex in Chile impacted air traffic around the Southern Hemisphere for several months after the initial ash emissions. The ash deposited in vast areas of the Patagonian Steppe was subjected to the strong wind conditions prevalent during the austral winter and spring experiencing resuspension over various regions of Argentina. In this study we analyze the meteorological conditions that led to the episode of volcanic ash resuspension which impacted the city of Buenos Aires and resulted in the closure of the two main airports in Buenos Aires area (Ezeiza and Aeroparque) on 16 October 2011. A relevant result is that resuspended material (volcanic ash plus dust) imprints a distinguishable feature within the atmospheric thermodynamic vertical profiles. The thermodynamic soundings show the signature of "pulses of drying" in layers associated with the presence of hygroscopic ash in the atmosphere that has already been reported in similar episodes after volcanic eruptions in other parts of the world. This particular footprint can be used to detect the probable existence of volcanic ash layers. This study also illustrates the utility of ceilometers to detect not only cloud base at airports but also volcanic ash plumes at the boundary layer and up to 7 km altitude. Aerosol properties measured in the city during the resuspension episode indicate the presence of enhanced concentrations of aerosol particles in the boundary layer along with spectral signatures in the measurements at the Buenos Aires AERONET site typical of ash plus dust advected towards the city. The mandatory aviation reports from the National Weather Service about airborne and deposited volcanic ash at the airport near the measurement site (Aeroparque) correlate in time with the enhanced concentrations. The presence of the resuspended material was detected by the CALIOP lidar overpassing the region. Since the dynamics of ash resuspension and

  12. Sequías e inundaciones en la provincia de Buenos Aires (Argentina y su distribución espacio-temporal

    Directory of Open Access Journals (Sweden)

    Olga Eugenia Scarpati

    2013-01-01

    Full Text Available La provincia de Buenos Aires, importante pro- ductora agropecuaria argentina, ha sido escenario de eventos hidrológicos extremos (sequías e inundaciones de distinto grado de gravedad a lo largo del tiempo. Muchos de ellos ocasionaron catástrofes mientras que otros solo alteraron las condiciones normales de algunas áreas. Investigadores de distintas ramas científicas han estudiado estos eventos, principalmente en sus impactos económico-sociales, pero no desde una mirada que contemple las variaciones que experimenta el contenido de agua en el suelo. En este trabajo, primero, se analiza la evolución de eventos húmedos y secos aproximadamente desde el año 1600 (época colonial hasta 2008. Por otro lado, se aplicó un modelo de balance de agua en el suelo utilizando datos diarios de precipitación y constantes hidrológicas de los suelos (basados en datos obtenidos in situ; con lo que se obtuvo la distribución de los excesos y deficiencias de agua en el suelo, considerados como desen- cadenantes de los eventos hidrológicos extremos. Por último, se analizan la suma de los excesos y las defi- ciencias anuales de agua en el suelo desde 1969 a 2008, en 16 sectores determinados según sus cuencas y se exponen los resultados en mapas con su distribución espacio-temporal.

  13. Patrimonio y turismo en dos ciudades intermedias de la provincia de Buenos Aires, Argentina: construcciones históricas ancladas en la naturaleza

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    Lorena Marina Sánchez

    2013-01-01

    Full Text Available La amalgama entre historia y naturaleza en las ciudades de la provincia de Buenos Aires, Argentina, permite comprender el origen y el progreso de las relaciones entre patrimonio y turismo. En particular, Mar del Plata y Tandil ostentan dos caras diferentes desde sus condiciones costeras y mediterráneas. La transformación de las condiciones naturales en características turístico-patrimoniales, ameritan un análisis histórico para comprender la modificación de los lugares y sus usos desde las prácticas de ocio y su promoción. Desde una investigación bibliográfica y fotográfica junto al análisis de imágenes textualizadas y discursos ilustrados en medios gráficos de difusión local y nacional, se exploran las construcciones valorativas que impulsarán las principales condiciones patrimoniales-atractoras de cada urbe, para así reflexionar sobre las acciones a fomentar.

  14. Histology and gametogenesis in Heleobia piscium (Cochliopidae) from the Multiple Use Reserve “Isla Martín García,” Buenos Aires, Argentina

    Science.gov (United States)

    Díaz, Ana C.

    2016-01-01

    Heleobia piscium (d’Orbigny, 1835), a member of the Cochliopidae family found only in South America, is distributed from Entre Ríos, Delta del Paraná, and the littoral of the Río de la Plata down as far as to Punta Indio (Buenos Aires), the southernmost limit of the snail’s geographical distribution. To date, little information is available regarding the reproductive cycle of species within this family either in Argentina or throughout South America. The present work analyzed the histology of the reproductive system of the gonochoric species H. piscium and determined the stages oogenesis and spermatogenesis under natural conditions. Specimens of H. piscium were collected in the Multiple-Use Natural Reserve Isla Martín García, located in the Upper Río de la Plata estuary to the south of the mouth of the Uruguay River. The gametogenic cycle in both sexes was found to consist of the following stages: early maturation, maturation, and evacuation. The maturation period was found to extend from January to October and evacuation of the gametes to start in November and end in February (summer in the Southern Hemisphere). The results indicated the H. piscium exhibit a reproductive cycle without a resting period. PMID:27761336

  15. Stenomicra (Diptera: Opomyzoidea in Argentina, with information on the biology of the genus Stenomicra (Diptera: Opomyzoidea en Argentina, con información sobre la biología del género

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    Raúl E. Campos

    2010-12-01

    Full Text Available This is the first literature record of the genus Stenomicra Coquillett (Diptera: Periscelididae from South America (Neotropical Region. New information on the biological cycle of Stenomicra species in the wild is provided, and four species of the genus Eryngium L. (Apiaceae are recorded as host plants for immature stages of this taxon. The specimens of Stenomicra sp. were collected in Sierra de la Ventana, Buenos Aires province, Argentina.En este estudio, se publica por primera vez para Sudamérica (Región Neotropical el género Stenomicra Coquillett (Diptera: Periscelididae. Se aporta información sobre su ciclo biológico en condiciones naturales y se mencionan cuatro especies del género Eryngium L. (Apiaceae, como plantas hospedadoras de los estados inmaduros. Los ejemplares de Stenomicra sp. fueron colectados en Sierra de la Ventana, Provincia de Buenos Aires, Argentina.

  16. Genetic and Phylogenetic Analyses of Influenza A H1N1pdm Virus in Buenos Aires, Argentina ▿ †

    Science.gov (United States)

    Barrero, P. R.; Viegas, M.; Valinotto, L. E.; Mistchenko, A. S.

    2011-01-01

    An influenza pandemic caused by swine-origin influenza virus A/H1N1 (H1N1pdm) spread worldwide in 2009, with 12,080 confirmed cases and 626 deaths occurring in Argentina. A total of 330 H1N1pdm viruses were detected from May to August 2009, and phylogenetic and genetic analyses of 21 complete genome sequences from both mild and fatal cases were achieved with reference to concatenated whole genomes. In addition, the analysis of another 16 hemagglutinin (HA), neuraminidase (NA), and matrix (M) gene sequences of Argentinean isolates was performed. The microevolution timeline was assessed and resistance monitoring of an NA fragment from 228 samples throughout the 2009 pandemic peak was performed by sequencing and pyrosequencing. We also assessed the viral growth kinetics for samples with replacements at the genomic level or special clinical features. In this study, we found by Bayesian inference that the Argentinean complete genome sequences clustered with globally distributed clade 7 sequences. The HA sequences were related to samples from the northern hemisphere autumn-winter from September to December 2009. The NA of Argentinean sequences belonged to the New York group. The N-4 fragment as well as the hierarchical clustering of samples showed that a consensus sequence prevailed in time but also that different variants, including five H275Y oseltamivir-resistant strains, arose from May to August 2009. Fatal and oseltamivir-resistant isolates had impaired growth and a small plaque phenotype compared to oseltamivir-sensitive and consensus strains. Although these strains might not be fit enough to spread in the entire population, molecular surveillance proved to be essential to monitor resistance and viral dynamics in our country. PMID:21047959

  17. Sixteen years of evolution of human respiratory syncytial virus subgroup A in Buenos Aires, Argentina: GA2 the prevalent genotype through the years.

    Science.gov (United States)

    Viegas, M; Goya, S; Mistchenko, A S

    2016-09-01

    Human respiratory syncytial virus (HRSV) is the main viral cause of acute lower respiratory tract infections (LRTI) in children worldwide. In recent years, several preclinical trials with vaccine candidates have been reported. It is in this sense that molecular epidemiological studies become important. Understanding viral dispersion patterns before and after the implementation of a vaccine can provide insight into the effectiveness of the control strategies. In this work we analyzed the molecular epidemiology of HRSV-A over a period of sixteen years (1999-2014) in Buenos Aires. By bioinformatic tools we analyzed 169 sequences of the G glycoprotein gene from hospitalized pediatric patients with LRTI. We found that GA2 was the most prevalent genotype (73.35%). GA5 genotype co-circulated in our region until 2009 when it was no longer detected, except in 2011. The recently globally emerging ON1 lineage with a 72-nt duplication increased its frequency to become the only lineage detected in Buenos Aires in 2014. By discrete phylogeographic analysis of global ON1 strains we could determine that Panama could be the location of the MRCA dated June 20, 2010; and this lineage could be introduced in Argentina from Spain in April 2011. This analysis also showed temporary and geographical clustering of ON1 strains observed as phylogenetic clades with strains exclusively associated from a single country, nevertheless among our 44 ON1 strains from three outbreaks (2012-2014) we could also detect posterior reintroductions and circulation from United States, Cuba, South Korea, and Spain. The continuous phylogeographic analysis of one sublineage of Argentine ON1 strains allowed us to establish that there could be a local clustering of some strains even in neighborhoods. This work shows the potential of this type of bioinformatic tools in the context of a future vaccine surveillance network to trace the spread of new genetic lineages in human populations. PMID:27154330

  18. Children's palliative care now! Highlights from the second ICPCN conference on children's palliative care, 18-21 May 2016, Buenos Aires, Argentina.

    Science.gov (United States)

    Downing, J; Kiman, R; Boucher, S; Nkosi, B; Steel, B; Marston, C; Lascar, E; Marston, J

    2016-01-01

    The International Children's Palliative Care Network held its second international conference on children's palliative care in Buenos Aires, Argentina, from the 18th-21st May 2016. The theme of the conference was 'Children's Palliative Care…. Now!' emphasising the need for palliative care for children now, as the future will be too late for many of them. Six pre-conference workshops were held, addressing issues connected to pain assessment and management, adolescent palliative care, ethics and decision-making, developing programmes, the basics of children's palliative care, and hidden aspects of children's palliative care. The conference brought together 410 participants from 40 countries. Plenary, concurrent, and poster presentations covered issues around the status of children's palliative care, genetics, perinatal and neonatal palliative care, the impact of children's palliative care and the experiences of parents and volunteers, palliative care as a human right, education in children's palliative care, managing complex pain in children, spiritual care and when to initiate palliative care. The 'Big Debate' explored issues around decision-making and end of life care in children, and gave participants the opportunity to explore a sensitive and thought provoking topic. At the end of the conference, delegates were urged to sign the Commitment of Buenos Aires which called for governments to implement the WHA resolution and ensure access to palliative care for neonates, children and their families, and also commits us as palliative care providers to share all that we can and collaborate with each other to achieve the global vision of palliative care for all children who need it. The conference highlighted the ongoing issues in children's palliative care and participants were continually challenged to ensure that children can access palliative care NOW. PMID:27610193

  19. Child feeding practices and household food insecurity among low-income mothers in Buenos Aires, Argentina Práticas de alimentação infantil e insegurança alimentar doméstica entre mães de baixa renda em Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Ana Cristina Lindsay

    2012-03-01

    Full Text Available This qualitative study of low-income mothers in Buenos Aires, Argentina, examines the influence of socio-economic conditions, organizational structures, family relationships, and food insecurity on child feeding practices and weight status. Thirty-eight mothers of preschool children living in urban Buenos Aires participated in four focus group discussions. The results indicated that many mothers were aware that obesity may be detrimental to the child's health, but most of them are unclear about the specific consequences. Maternal employment, family pressures, food insecurity and financial worries seem to influence child feeding practices. These findings have important implications for developing strategies for nutritional assistance that could benefit the health of children and provide opportunities for educational programs that are directed to nutritional awareness in Buenos Aires, Argentina. The right to eat regularly and properly is an obligation of the State and must be implemented taking into account the notion of food sovereignty and respecting the importance of preserving the culture and eating habits of a country and its diverse population groupsEstudo qualitativo realizado com mães de baixa renda em Buenos Aires, Argentina, que examina a influência das condições socioeconômicas, da estrutura organizacional, das relações familiares e da insegurança alimentar sobre as práticas de alimentação infantil e o padrão de peso. Trinta e oito mães de crianças pré-escolares que vivem em áreas urbanas de Buenos Aires participaram de quatro discussões em grupos focais. Os resultados indicaram que muitas mães estavam cientes de que a obesidade pode ser prejudicial para a saúde da criança, mas a maioria não tem clareza sobre as consequências. O trabalho materno, as pressões familiares, a insegurança alimentar e as preocupações financeiras parecem influenciar as práticas de alimentação infantil. Esses achados t

  20. UV-A (315-400 nm) irradiance from measurements at 380 nm for solar water treatment and disinfection. Comparison between model and measurements in Buenos Aires, Argentina and Almeria, Spain

    Energy Technology Data Exchange (ETDEWEB)

    Navntoft, C.; Dawidowski, L. [Unidad de Actividad Quimica, Comision Nacional de Energia Atomica, Av. Gral Paz 1499, B1650KNA San Martin (Argentina)]|[Escuela de Posgrado, Universidad Nacional de San Martin, Peatonal Belgrano 3563, B1650ANQ San Martin (Argentina); Blesa, M.A. [Unidad de Actividad Quimica, Comision Nacional de Energia Atomica, Av. Gral Paz 1499, B1650KNA San Martin (Argentina)]|[Escuela de Posgrado, Universidad Nacional de San Martin, Peatonal Belgrano 3563, B1650ANQ San Martin (Argentina)]|[Consejo Nacional de investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AAJ Ciudad de Buenos Aires (Argentina); Fernandez-Ibanez, P. [Plataforma Solar de Almeria, Carretera Senes km 4, 04002 Tabernas (Spain); Wolfram, E.A. [Centro de Investigaciones Cientificas y Tecnicas de las Fuerzas Armadas (CITEFA), San Juan Bautista de La Salle 4397, B1603ALO Villa Martelli (Argentina); Paladini, A. [Instituto de Genetica y Biologia Molecular, Vuelta de Obligado 2490, CP 1428, Ciudad de Buenos Aires (Argentina)]|[Consejo Nacional de investigaciones Cientificas y Tecnicas (CONICET), Av. Rivadavia 1917, C1033AAJ Ciudad de Buenos Aires (Argentina)

    2009-02-15

    A linear correlation between UV-A and 380 nm was developed by means of the TUV 4.1 radiative transfer model. The prediction error of the correlation was evaluated with data from Buenos Aires, Argentina, 2001, and from 2006, Almeria, Spain. Percent random mean square error (RMSE%) was calculated for intervals of 10 of solar zenith angles, ranging 4.75% at 20 to 37.70% at 90 in clear days and 22.16% at 20 to 26.17% at 90 for cloudy days in Buenos Aires Argentina, and 1.27% at 20 to 11.27% at 90 for clear days in Almeria, Spain. Clouded days were not assessed with the data from Spain. In Argentina, the UV-A radiometer is located in a rural area and the 380 nm radiometer is located in an urban area 6 km away. Hence the real error of the proposed model is closer to that found in Spain were both measurements were performed at the same site. The objective of the work is to achieve a simple and precise method to assess UV-A availability for environmental applications of solar energy, particularly for solar water treatment, at any desired latitude. (author)

  1. Endicamientos naturales en las nacientes del Arroyo Lileo (Provincia del Neuquén, Argentina Natural dams in the headwater of the Lileo valley (Neuquén province, Argentina

    Directory of Open Access Journals (Sweden)

    Ivanna M Penna

    2012-09-01

    Full Text Available En este trabajo analizamos tres endicamientos naturales por depositación de movimientos en masa que tuvieron lugar en las nacientes del arroyo Lileo (Cordillera de los Andes, norte neuquino, dos de ellos ocurrieron en los últimos 50 años. El primero ocurrió en el Holoceno, por desprendimiento de 0,14 km³ de volcanitas en la ladera oeste del valle, cerca de las nacientes del arroyo La Tregua. Este bloqueo originó una laguna permanente de 0,44 km². En los años '60, la depositación de una avalancha de detritos originada en la ladera opuesta del valle, frente a la escarpa de la avalancha de rocas, ocluyó la brecha labrada por erosión fluvial en el depósito de avalancha de rocas, generando un segundo cuerpo lacustre de tipo efímero. El último endicamiento, que tuvo lugar entre >1962-In this paper we analyze three natural dams that formed by deposits of mass movement that took place in the headwater of Lileo creek (Cordillera de los Andes, northern Neuquén, Argentina, two of them occurred in the last 50 years. The first one happened in the Holocene, by detachment of 0.14 km³ of volcanites in the western side of the valley, near the headwater of the La Tregua creek. This blockade originated a permanent water body of 0.44 km². The deposition in the 60's of a debris avalanche, originated in the slope of the valley opposite the scarp of the rock avalanche, occluded the breach carved by fluvial erosion in the rock avalanche deposit, generating a second water body of ephemeral type. The last dam, that took place between >1962- < 1985, was caused by a sudden progradation of a conoid developed in the mouth of La Tregua creek, due to an important contribution of material by a debris flow originated in the same zone of detachment as the aforementioned case. The continuous deposition of material in the conoid zone has buried the poles of the Loma de la Lata - Talcahuano gas pipeline, built in 1998. As the zone of detachment of the eastern side

  2. The impact of different cooling strategies on urban air temperatures: the cases of Campinas, Brazil and Mendoza, Argentina

    Science.gov (United States)

    Alchapar, Noelia Liliana; Cotrim Pezzuto, Claudia; Correa, Erica Norma; Chebel Labaki, Lucila

    2016-07-01

    This paper describes different ways of reducing urban air temperature and their results in two cities: Campinas, Brazil—a warm temperate climate with a dry winter and hot summer (Cwa), and Mendoza, Argentina—a desert climate with cold steppe (BWk). A high-resolution microclimate modeling system—ENVI-met 3.1—was used to evaluate the thermal performance of an urban canyon in each city. A total of 18 scenarios were simulated including changes in the surface albedo, vegetation percentage, and the H/W aspect ratio of the urban canyons. These results revealed the same trend in behavior for each of the combinations of strategies evaluated in both cities. Nevertheless, these strategies produce a greater temperature reduction in the warm temperate climate (Cwa). Increasing the vegetation percentage reduces air temperatures and mean radiant temperatures in all scenarios. In addition, there is a greater decrease of urban temperature with the vegetation increase when the H/W aspect ratio is lower. Also, applying low albedo on vertical surfaces and high albedo on horizontal surfaces is successful in reducing air temperatures without raising the mean radiant temperature. The best combination of strategies—60 % of vegetation, low albedos on walls and high albedos on pavements and roofs, and 1.5 H/W—could reduce air temperatures up to 6.4 °C in Campinas and 3.5 °C in Mendoza.

  3. Changes in soil organic matter under different land management in misiones province (Argentina Mudanças na matéria orgânica edafica sob diferentes manejos de solo na província de misiones (Argentina

    Directory of Open Access Journals (Sweden)

    Gabriel Agustín Piccolo

    2008-01-01

    Full Text Available Highly weathered tropical soils rapidly loose soil organic matter (SOM and may be affected by water erosion and soil compaction after deforestation and intensive cultivation. With the main objective to estimate the SOM balances in a subtropical soil we determined the dynamics of SOM in a degraded yerba mate (Ilex paraguaiensis Saint Hil. plantation introduced after deforestation and with elephant grass (Pennisetum purpureum L. as a cover crop. The study site was in Misiones, Argentina, and we use the natural 13C abundance methodology and a descriptive model. The study was conducted on three contiguous 50 x 100 m plots of a typic Kandihumult soil with: (i native forest, (ii 50 years of continuous yerba mate monoculture with intensive tillage, and (iii yerba mate associated with elephant grass as a cover crop and no tillage. We determined bulk density, carbon (C, nitrogen (N and 13C content of the soil (0 - 0.05, 0.05 - 0.15 m layers and the grass biomass. Yerba mate monoculture reduced soil C and N content as well as porosity at 0 - 0.15 m depth by 43 and 23%, respectively, as compared to the native forest. After ten years of yerba mate - elephant grass association soil C and N contents at the same depth increased by 19 and 12%, respectively, compared to the yerba mate monoculture, while soil porosity remained similar. Total C input,13C, and soil organic C were incorporated into a three compartment model to evaluate elephant grass C dynamics. Through the natural 13C abundance methodology we tracked the elephant grass C incorporation and the "old" soil C loss, and determined the model parameters - humification (k1 and mineralization (k coefficients and stable C (Cs- unambiguously. The high k1 and k predicted by the model are probably explained by elephant grass root system incorporation under no tillage and humid subtropical climate, respectively. In soil under yerba mate monoculture, Cs was counted as 91% of the total soil organic C.Os solos

  4. Estudio de la contaminación con huevos de Toxocara sp. en suelos de espacios públicos de San Martín de los Andes, Provincia del Neuquén. Argentina. (Soil contamination with Toxocara sp. eggs in public parks from San Martín de los Andes, Province of Neuquen, Argentina

    Directory of Open Access Journals (Sweden)

    Brusoni, Claudio: Medico Veterinario,

    2005-10-01

    Full Text Available Con el objetivo de determinar la presencia de huevos de Toxocara sp. en suelos de espacios públicos de San Martín de los Andes, Provincia del Neuquén, Argentina, se estudiaron suelos de 12 parques de la localidad entre Abril y Julio de 2005. Se comprobó la presencia de huevos de Toxocara sp. en el 92% de los sitios de muestreados. Se recomienda la implementación de acciones para minimizar los riesgos a la salud pública. The objective being to determine if our soil in parks and publics areas were contaminated with Toxocara sp. eggs, we surveyed 12 different places in the area of San Martín de los Andes, Province of Neuquén from April to July, 2005. The presence of Toxocara sp. Eggs was confirmed in 92% of the places studied. In order to minimize the risk for our public health, we recommended the implementation of safety measures.

  5. Comunidades de insectos acuáticos de charcos temporarios y lagunas en la ciudad de Buenos Aires (Argentina) Aquatic insect communities of temporary pools and permanent ponds in Buenos Aires City (Argentina)

    OpenAIRE

    María S. Fontanarrosa; Patricia L. M. Torres; Mariano C. Michat

    2004-01-01

    Se realizó un estudio comparativo de la comunidad de insectos acuáticos presente en charcos temporarios de parques y plazas de la ciudad de Buenos Aires, y en lagunas permanentes de la Reserva Ecológica Costanera Sur, situada en la ribera del Río de la Plata. Se revisaron 3436 charcos y se visitaron, en 149 oportunidades, seis lagunas de la reserva. Para el conjunto de ambientes, se registraron 85 taxones pertenecientes a cinco órdenes de insectos. Los coleópteros fueron los más diversos (36 ...

  6. Phylogeny, diet, and habitat of an extinct ground sloth from Cuchillo Curá, Neuquén Province, southwest Argentina

    Science.gov (United States)

    Hofreiter, Michael; Betancourt, Julio L.; Sbriller, Alicia Pelliza; Markgraf, Vera; McDonald, H. Gregory

    2003-01-01

    Advancements in ancient DNA analyses now permit comparative molecular and morphological studies of extinct animal dung commonly preserved in caves of semiarid regions. These new techniques are showcased using a unique dung deposit preserved in a late glacial vizcacha (Lagidium sp.) midden from a limestone cave in southwestern Argentina (38.5° S). Phylogenetic analyses of the mitochondrial DNA show that the dung originated from a small ground sloth species not yet represented by skeletal material in the region, and not closely related to any of the four previously sequenced extinct and extant sloth species. Analyses of pollen and plant cuticles, as well as analyses of the chloroplast DNA, show that the Cuchillo Curá ground sloth browsed on many of the same herb, grass, and shrub genera common at the site today, and that its habitat was treeless Patagonian scrub-steppe. We envision a day when molecular analyses are used routinely to supplement morphological identifications and possibly to provide a time-lapse view of molecular diversification.

  7. Continuous multi-criteria methods for crop and soil conservation planning on La Colacha (Río Cuarto, Province of Córdoba, Argentina

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    J. M. Antón

    2012-08-01

    Full Text Available Agro-areas of Arroyos Menores (La Colacha west and south of Río Cuarto (Prov. of Córdoba, Argentina basins are very fertile but have high soil loses. Extreme rain events, inundations and other severe erosions forming gullies demand urgently actions in this area to avoid soil degradation and erosion supporting good levels of agro production. The authors first improved hydrologic data on La Colacha, evaluated the systems of soil uses and actions that could be recommended considering the relevant aspects of the study area and applied decision support systems (DSS with mathematic tools for planning of defences and uses of soils in these areas. These were conducted here using multi-criteria models, in multi-criteria decision making (MCDM; first of discrete MCDM to chose among global types of use of soils, and then of continuous MCDM to evaluate and optimize combined actions, including repartition of soil use and the necessary levels of works for soil conservation and for hydraulic management to conserve against erosion these basins. Relatively global solutions for La Colacha area have been defined and were optimised by Linear Programming in Goal Programming forms that are presented as Weighted or Lexicographic Goal Programming and as Compromise Programming. The decision methods used are described, indicating algorithms used, and examples for some representative scenarios on La Colacha area are given.

  8. Who Defines Culturally Acceptable Health Access? Universal rights, healthcare politics and the problems of two Mbya-Guarani communities in the Misiones Province, Argentina

    Directory of Open Access Journals (Sweden)

    A. Sy

    2013-05-01

    Full Text Available This paper seeks to analyze the problems and barriers encountered when public policy health programs are implemented within indigenous communities. The initial stumbling block for such programs is precisely the idea of health as a universal right, around which emerges a characterization and stereotype of the indigenous population who are consequently addressed as a homogenized unit subsisting below the poverty line, and marginalized. A result of this is that the  particular ethno-cultural register of such populations fails to be acknowledged and form part of a systematic public health policy. Consequently, health policies become generalized in character, unable to variate and differentiate according to the culturally specific contexts within which health outreach and access is needed. In this sense, based on the results of an ethnographic study carried out in two Mbya-Guaraní indigenous communities of Argentina, our study highlights as to how public policies of indigenous health are perceived, their impact value measured, and the meanings which emerge locally about the policy practices implemented.Lastly, our study identifies problems that can be avoided in fulfilling the goals of universal policies and certain questions to consider at the time of policy design and implementation.

  9. Molecular characterization of Rickettsia massiliae and Anaplasma platys infecting Rhipicephalus sanguineus ticks and domestic dogs, Buenos Aires (Argentina).

    Science.gov (United States)

    Cicuttin, Gabriel L; Brambati, Diego F; Rodríguez Eugui, Juan I; Lebrero, Cecilia González; De Salvo, María N; Beltrán, Fernando J; Gury Dohmen, Federico E; Jado, Isabel; Anda, Pedro

    2014-09-01

    Rickettsioses, ehrlichioses and anaplasmoses are emerging diseases that are mainly transmitted by arthropods and that affect humans and animals. The aim of the present study was to use molecular techniques to detect and characterize those pathogens in dogs and ticks from Buenos Aires city. We studied 207 Rhipicephalus sanguineus ticks and 52 canine blood samples from poor neighborhoods of Buenos Aires city. The samples were molecularly screened for the genera Rickettsia, Ehrlichia, and Anaplasma by PCR and sequencing. DNA of Rickettsia massiliae (3.4%) and Anaplasma platys (13.5%) was detected in ticks and blood samples, respectively. For characterization, the positive samples were subjected to amplification of a fragment of the 190-kDa outer membrane protein gene (spotted fever group rickettsiae) and a fragment of the groESL gene (specific for A. platys). A phylogenetic tree was constructed using the neighbor-joining method, revealing that the sequences were closely related to those of strains from other geographic regions. The results indicate that human and animal pathogens are abundant in dogs and their ticks in Buenos Aires city and portray the potentially high risk of human exposure to infection with these agents, especially in poor neighborhoods, where there is close contact with animals in an environment of poor health conditions.

  10. The Choiyoi volcanic province at 34°S-36°S (San Rafael, Mendoza, Argentina): Implications for the Late Palaeozoic evolution of the southwestern margin of Gondwana

    Science.gov (United States)

    Kleiman, Laura E.; Japas, María S.

    2009-08-01

    The Choiyoi rhyolitic province of Chile and Argentina (23°S-42°S) was emplaced at the SW margin of Gondwana during the Permian. The San Rafael Massif (Mendoza, Argentina, 34°-36°S), is a key area to analyse the relative timing of Choyoi magmatism and related deformation as it bears one of the most complete and well exposed succession. Stratigraphic, structural and magmatic studies indicate that major changes of geodynamic conditions occurred during the Permian since arc-related sequences syntectonic with transpression (lower Choiyoi) were followed by transitional to intraplate, postorogenic suites coeval with transtension (upper Choiyoi). During the Early Permian, a major event of N-NNW dextral transpressional motions deformed the Carboniferous foreland basin in the San Rafael Massif. This event is attributed to the first episode of the San Rafael orogeny and can be related to oblique subduction (Az. 30°) of the Palaeo-Pacific plate. Ca. 280 Ma the inception of voluminous calc-alkaline volcanism (lower Choiyoi) syntectonic with WNW sinistral transpression of the second episode of the San Rafael orogeny, is associated with an eastward migration of the magmatic arc at this latitude. To the southeast of San Rafael, magmatism and transpression continued to migrate inland suggesting that a progressively younger, WNW, sinistral, thick skinned deformation belt broadens into the foreland and can be traced from San Rafael to Sierra de la Ventana, linking the San Rafael orogeny with the Gondwanide orogeny of the Cape Fold Belt in South Africa. This distribution of magmatism and deformation is interpreted as being the consequence of a progressive shallowing of the Palaeo-Pacific plate starting to the north of San Rafael, and culminating with a flat-slab region south of 36°S. Ca. 265 Ma the onset of predominantly felsic volcanism (upper Choiyoi) in San Rafael occurred in a Post-San Rafael extensional setting. Kinematic indicators and strain fabric analyses of San Rafael

  11. Informing effective smokefree policies in Argentina: air quality monitoring study in 15 cities (2007-2009 Políticas efectivas de ambientes libres de humo de tabaco en Argentina: estudio de monitoreo de calidad del aire en 15 ciudades (2007-2009

    Directory of Open Access Journals (Sweden)

    Verónica Schoj

    2010-01-01

    Full Text Available Objective. To evaluate indoor air pollution in hospitality venues in Argentina. Material and Methods. PM2.5 levels were measured in a convenience sample of venues in 15 cities with different legislative contexts following a protocol developed by Roswell Park Cancer Institute. Results. 554 samples were collected. Across all 5 smokefree cities the mean PM2.5 level was lower during daytime vs. evening hours, 24 vs. 98 PM2.5 respectively (p=.012. In the three cities evaluated before and after legislation, PM2.5 levels decreased dramatically (pObjetivo. Evaluar la polución ambiental del sector gastronómico en Argentina. Material y métodos. Se midieron los niveles de partículas respirables (PM2.5 en una muestra por conveniencia de establecimientos de 15 ciudades con diferente legislación, siguiendo un protocolo del Instituto de Cáncer Roswell Park. Resultados. Se recolectaron 554 muestras. En cinco ciudades libres de humo (CLH la media de PM2.5 durante el día fue baja y menor a la observada durante la noche, 24 vs. 98 PM2.5 respectivamente (p=.012. En las tres ciudades evaluadas antes y después de la legislación, las PM2.5 disminuyeron drásticamente (p<0.001 cada una. Las PM2.5 fueron cinco veces mayores en ciudades sin legislación comparadas con CLH (p<0.001. En ciudades con restricción parcial, no hubo diferencia significativa entre las PM2.5 en el sector fumador y no fumador (p=0.272. Los sectores no fumadores tuvieron niveles PM2.5 significativamente más altos comparados con los lugares 100% libres de humo de la misma ciudad (p= 0.017. Conclusiones. La mayoría de las ciudades participantes en este estudio tuvieron niveles PM2.5 significativamente más bajos tras la implementación de leyes pro ambientes 100% libres de humo de tabaco, por lo que representa una herramienta útil para promover legislación 100% libre de humo en Argentina.

  12. Current situation of the facilities, equipments and human resources in nuclear medicine in Argentina

    International Nuclear Information System (INIS)

    The current situation of nuclear medicine in Argentina, taking into account the facilities, their equipment and human resources available is presented in this paper. A review and analysis of the equipment, including technical characteristics and a survey of the professionals and technicians of the area, was carried out. In Argentina, there are 266 centers of nuclear medicine distributed all over the country. The operating licenses are granted by the Nuclear Regulatory Authority (Autoridad Regulatoria Nuclear - ARN). Forty four percent of the installed equipment are SPECT of 1 or 2 heads and 39,4 % are gamma camera. Besides, there are eleven PET operating in Argentina. There are 416 nuclear medicine physicians with individual permit for diagnostic purposes and 50% of them has also individual permit for treatment purposes. With the purpose of analyzing the regional distribution of the available resources in nuclear medicine, the country was divided into 7 geographical regions: City of Buenos Aires, Province of Buenos Aires, Pampa, Cuyo, Northeast, Northwest and Patagonia. From the analysis of the gathered information it is possible to conclude that the nuclear medicine equipment as well as the personnel present an irregular distribution, with a major concentration in the City of Buenos Aires and Province of Buenos Aires. The Northeast region presents the lowest number of Nuclear Medicine centers and the Patagonia region has the lowest number of medicine nuclear physicians with individual permits. The number of SPECT and gamma cameras is 7,3 per million of inhabitants. The information about the available resources in nuclear medicine presented in this paper and its comparison with the international information available provide elements for a better planning of the future activities in the area not only for the operators but also from the regulatory point of view. (author)

  13. Long-term variability of heat waves in Argentina and recurrence probability of the severe 2008 heat wave in Buenos Aires

    Science.gov (United States)

    Rusticucci, Matilde; Kyselý, Jan; Almeira, Gustavo; Lhotka, Ondřej

    2016-05-01

    Heat waves are one of the main concerns related to the impacts of climate change, because their frequency and severity are projected to increase in a future climate. The objectives of this work are to study the long-term variability of heat waves over Argentina and to estimate recurrence probability of the most severe 2008 heat wave in Buenos Aires. We used three definitions of heat waves that were based on (1) daily maximum temperature above the 90th percentile (MaxTHW), (2) daily minimum temperature above the 90th percentile (MinTHW) and (3) both maximum and minimum temperatures above the corresponding 90th percentiles (EHW). The minimum length of a heat wave was 3 days, and the analysis was performed over the October-March period. Decadal values in Buenos Aires experienced clear increases in heat waves according to MinTHW and EHW, with the highest frequency for both in the 2001-2010 decade, but at other stations, combinations of different trends and decadal variability resulted in some cases in a decrease of extreme heat waves. In the north-western part of the country, a strong positive change in the last decade was found, mainly due to the increment in the persistence of MinTHW but also accompanied by increases in MaxTHW. In general, other stations show a clear positive trend in MinTHW and decadal variability in MaxTHW, with the largest EHW cases in the last decade. We also estimated recurrence probability of the longest and most severe heat wave in Buenos Aires (over 1909-2010, according to intensity measured by the cumulative excess of maximum daily temperature above the 90th percentile) that occurred from 3 to 14 November 2008, by means of simulations with a stochastic first-order autoregressive model. The recurrence probability of such long and severe heat wave is small in the present climate but it is likely to increase substantially in the near future even under a moderate warming trend.

  14. Comunidades de insectos acuáticos de charcos temporarios y lagunas en la ciudad de Buenos Aires (Argentina Aquatic insect communities of temporary pools and permanent ponds in Buenos Aires City (Argentina

    Directory of Open Access Journals (Sweden)

    María S. Fontanarrosa

    2004-12-01

    Full Text Available Se realizó un estudio comparativo de la comunidad de insectos acuáticos presente en charcos temporarios de parques y plazas de la ciudad de Buenos Aires, y en lagunas permanentes de la Reserva Ecológica Costanera Sur, situada en la ribera del Río de la Plata. Se revisaron 3436 charcos y se visitaron, en 149 oportunidades, seis lagunas de la reserva. Para el conjunto de ambientes, se registraron 85 taxones pertenecientes a cinco órdenes de insectos. Los coleópteros fueron los más diversos (36 taxones, seguidos por los dípteros (27, heterópteros (17, odonatos (4 y efemerópteros (1. Se observaron altos valores de riqueza en los charcos temporarios (58 taxones y las lagunas sin vegetación flotante (64 taxones. La diversidad estimada de los charcos temporarios fue significativamente (pWe studied the community of aquatic insects inhabiting both temporary pools and permanent ponds occuring in Buenos Aires City. A total of 3436 rain pools were examined, and six permanent ponds at the "Reserva Ecológica Costanera Sur" in the Río de la Plata riverside were visited 149 times. A total of 85 taxa were recorded from both habitats, included in five orders of Insecta. The order Coleoptera showed the highest diversity values (36 taxa, followed by Diptera (27, Heteroptera (17, Odonata (4, and Ephemeroptera (1. High values of richness were observed in temporary pools (58 taxa and permanent ponds without floating vegetation (64 taxa. The diversity index for temporary ponds was significantly (p<0,05 lower than in permanent habitats.

  15. HIV-1, HIV-2, HTLV-I/II and STD among female prostitutes in Buenos Aires, Argentina.

    Science.gov (United States)

    Zapiola, I; Salomone, S; Alvarez, A; Scolastico, M C; Koessel, R A; Lemus, J; Wainstein, C; Muchinik, G

    1996-02-01

    To determine the prevalence of HIV-1 and HTLV-I/II among female prostitutes from different areas of the city of Buenos Aires, we studied serum samples from 237 individuals (mean age: 25; range 17 to 39). Prostitutes were recruited from 16 different Buenos Aires locations with different economical status. Information on sexual behaviour, health and socioeconomic conditions was collected through a questionnaire. HIV-1 and HTLV-I/II antibodies (ab) were tested by ELISA (Abbott) and Particle agglutination (Fujirebio, Tokyo) respectively. Positive results were confirmed by immunofluorescence assay. Samples that were positive for HIV-1 antibodies were also tested for p24 antigen (Abbott). VDRL for syphilis was performed in all samples. Fifteen (6.3%) out of the 237 individuals were positive for HIV-1 antibodies. Moreover, 2 (0.8%) HIV-1 seropositive prostitutes were also positive for HTLV-I/II antibodies and for HIV p24-Ag. Even though PCR for HTLV-I/II was not performed, titration by IFA in these two samples suggests HTLV-I. Our serologic results indicate a relatively high HIV-1 infection among prostitutes working in Buenos Aires. As we previously mentioned for other risk groups, we found an association between HTLV-I/II and HIV-1 infection in this particular group. Although we did not find any significant difference between HIV-1 seropositivity and the variables analyzed through the questionnaire, the prevalence of HIV-1 infection was higher in prostitutes working in mask brothels ('sauna or massage houses') as compared with hotel or street prostitutes.

  16. Epidemiología de la tripanosomiasis americana en el Norte de Corrientes Epidemiology of American trypanosomiasis in the North of Corrientes province, Argentina

    Directory of Open Access Journals (Sweden)

    María Esther Bar

    2010-04-01

    Full Text Available El objetivo de esta investigación fue evaluar la presencia de triatominos en ecotopos domésticos y extradomésticos, determinar el índice de infección de los triatominos y estimar la prevalencia humana de anticuerpos contra el Trypanosoma cruzi. Los muestreos se llevaron a cabo en viviendas seleccionadas al azar en áreas rurales (departamentos Mburucuyá en otoño 2007 y Berón de Astrada en verano 2008 de Corrientes, Argentina. El diagnóstico de la infección chagásica se realizó a voluntarios mediante las pruebas de hemaglutinación indirecta, inmunofluorescencia indirecta y ensayo inmunoenzimático. Se exploraron 32 viviendas y 33 peridomicilios en Mburucuyá, y 30 viviendas y 25 peridomicilios en Berón de Astrada. En Mburucuyá la infestación del peridomicilio por Triatoma sordida alcanzó un 3.0%, capturándose 19 ninfas en un gallinero. La infestación del peridomicilio en Berón de Astrada fue 4.0%, detectándose una hembra y 58 huevos en un nidal de ave. Tanto la hembra como las ninfas resultaron negativas al T. cruzi. La prevalencia de seropositivos humanos al T. cruzi fue 5.2% (4/77 en Mburucuyá y 14.3% (11/77 en Berón de Astrada. En el domicilio no se confirmó infestación por triatominos y en el peridomicilio el índice de infestación fue bajo. Es necesario implementar nuevas estrategias de control vectorial, especialmente para las especies que habitan en estructuras peridomésticas y biotopos silvestres. La seroprevalencia fue menor a la observada en investigaciones previas en las áreas rurales de Corrientes. La ausencia de seropositivos de 0-10 años indica que la transmisión vectorial está interrumpida.The aim of this investigation was to evaluate triatomine colonization in domestic and extradomestic ecotopes, to determine triatomines infection index and to assess human prevalence of anti Trypanosoma cruzi antibodies at Berón de Astrada and Mburucuyá Departments, Corrientes, Argentina. Samplings were performed

  17. Un desafío a la justicia social peronista: la hidatidosis en la provincia de Buenos Aires, 1946-1952 A challenge to Peronism's social justice: hydatidosis in the province of Buenos Aires, 1946-1952

    OpenAIRE

    Adriana Valobra

    2007-01-01

    Analiza las políticas sanitarias del gobierno de Domingo Alfredo Mercante (1946-1952) - mano derecha de Juan Domingo Perón - en la provincia de Buenos Aires, Argentina, atendiendo a lo que fue una de sus más instigantes líneas de intervención: la erradicación de la hidatidosis. Visibilizando un problema largamente olvidado por la historiografía, especificaremos de qué modo el gobierno mercantiano colocó a la hidatidosis en la agenda estatal a través de una legitimación estadística, socioeconó...

  18. Federalismo y políticas ambientales en la Región Metropolitana de Buenos Aires, Argentina

    OpenAIRE

    Ricardo A Gutiérrez

    2012-01-01

    La articulación entre la escala metropolitana de los problemas y la multiplicidad de jurisdicciones gubernamentales constituye un desafío para cualquier política ambiental. Centrado en la Región Metropolitana de Buenos Aires, este trabajo aborda la coordinación de políticas ambientales metropolitanas en un contexto federal. La primera parte describe la región metropolitana, el modo en que el federalismo argentino distribuye competencias ambientales entre niveles de gobierno, los mecanismos in...

  19. [Correlation between results of the residency admission test and of pediatric certification test in Buenos Aires, Argentina].

    Science.gov (United States)

    Ferreira, Juan Pablo; Hamui, Magali; Paganini, Agustina; Torres, Fernando A; Ossorio, María Fabiana; Eiguchi, Kumiko; Ferrero, Fernando

    2016-01-01

    In the city of Buenos Aires (CABA), pediatric residents enter the residency program after taking a unified admission test. After completion of the program and passing a final test, the Universidad de Buenos Aires (UBA) provides a professional certification. The objective of this study is to determine if the results obtained in the residency admission test (RAT) and those of the professional certification test (PCT) correlated. This is a cross-sectional study, that included all subjects who passed the pediatrics RAT in CABA in 2004-2009, and that attended the pediatric PCT of the UBA. The score for each subject in both tests was obtained and the corresponding correlation was calculated. Results were divided in quintiles, and the proportion of subjects who improved their position in the PCT with respect to the RAT was calculated. Data from 303 subjects was obtained. The RAT showed a median of 45.0 (over 60 maximum) (IC-range: 43.0-48.7), and the PCT showed a median of 6 points (over 10 max.)(IC-range: 6-8). A significative correlation between results in RAT and PCT was observed (r = 0.37, p PCT, without differences between residents attending pediatric and general hospitals (45.6 vs. 31.5%; p = 0.1). In the case of pediatric residents, results of the residency admission test correlate with those obtained in the professional certification test. PMID:27295703

  20. Social and environmental health determinants and their relationship with parasitic diseases in asymptomatic children from a shantytown in Buenos Aires, Argentina

    Science.gov (United States)

    Garbossa, Graciela; Pía Buyayisqui, María; Geffner, Laura; López Arias, Ludmila; de la Fournière, Sofía; Haedo, Ana S; Marconi, Adela E; Frid, Juan C; Nesse, Alcira B; Bordoni, Noemí

    2013-01-01

    Health inequities are a common problem for all countries and are the result of not only adverse social conditions but also poor public policies. Today chronic diseases represent the most relevant threats and are a current challenge. Parasitic infections, a leading cause of child morbidity affecting low-income populations, can be transmitted because of an unhealthy environment. Notwithstanding, scarce data have been published on the epidemiological profile of intestinal parasitoses in asymptomatic children living in shantytowns. Vulnerable populations settled in slums are growing in Argentina, particularly in Buenos Aires city. Consequently, this work intended to screen healthy carriers of enteric parasites and determine the epidemiologic profile in asymptomatic children residing in one of those communities, to explore risk factors associated with the transmission of parasites, and to initiate a basic health education campaign to promote healthy behavior in the community. Fecal samples (n = 138) were analyzed by conventional parasitological methods and a survey gathered data on symptoms, family composition, and environmental and hygiene-related variables. High prevalence of feco-orally-transmitted parasitoses (83.3%) and polyparasitism were remarkable findings. The main environmental health determinants were those related to excreta disposal and water provision. Health promotion actions were performed through the diffusion of a set of posters with iconic images and brief messages for health education. Results suggest the need for an environmental sanitation policy to complement health promotion actions. It is essential to spread the results of investigations that address inequities and social determinants of health in order to integrate data with local political processes and alert on acceptable actions for developing appropriate interventions. PMID:23683369

  1. Homicidios diarios. Análisis del discurso periodístico sobre homicidios por armas de fuego. Buenos Aires (Argentina 2001-2002

    Directory of Open Access Journals (Sweden)

    Leonardo Federico

    2010-01-01

    Full Text Available Durante los años 2001 y 2002, la Argentina atravesó una grave crisis política y social, alcanzando niveles de pobreza y exclusión inauditos. En esos años, los diferentes tipos de violencia urbana mostraron un marcado incremento, en especial los homicidios cometidos mediante el uso de armas de fuego, constituyéndose en una problemática social con importantes repercusiones para la salud pública. El presente artículo es producto de una investigación cualitativa que indagó, mediante un análisis crítico del discurso, las diferentes modalidades con que los diarios La Nación y Clarín dieron cuenta de los hechos acaecidos -durante dicho período- en la Ciudad Autónoma de Buenos Aires. Los datos se obtuvieron de la recopilación de material de hemeroteca, y fueron analizados a partir de una técnica propia referenciada en la Escuela Francesa de Análisis del Discurso. En cuanto a los resultados del estudio, se subraya: el posicionamiento más popular adoptado por el diario Clarín (lógica enunciativa de la verosimilitud, en contraposicióncon la búsqueda de objetividad de La Nación (lógica de la verificación, asumiendo ambos un carácter complementario en la producción y reproducción social de sentido, al dar cuenta de las muertes por homicidios ocasionadas mediante el uso de armas de fuego.

  2. Diserción en estudiantes de nuevo ingreso a carreras de diseño. El caso de la unversidad de Buenos aires, Argentina

    Directory of Open Access Journals (Sweden)

    Maris Vásquez, Stella

    2015-01-01

    Full Text Available El artículo presenta los resultados de una investigación acerca de los factores que inciden en la deserción y retención en la educación superior. En una muestra de 2273 alumnos del primer año de las carreras de Arquitectura, Diseño y Urbanismo de la Universidad de Buenos Aires, Argentina, que cursaron la materia de Dibujo, se aplicó un instrumento ad-hoc para evaluar la competencia espacial, el cuestionario MSLQ para evaluar los componentes del estilo de aprendizaje y se recogieron los datos demográficos y las calificaciones obtenidas por los alumnos. Se verificó que los factores de más peso en la explicación de la varianza para la deserción/retención fueron el nivel de competencia espacial en el momento de iniciar el curso, el rendimiento del primer semestre y las variables relacionadas con el estilo de aprendizaje. Además, se verificaron relaciones con factores demográficos: sexo, momento de inscripción, lugar de proveniencia y tipo de escuela media, gestión y orientación. De estos resultados surgen algunas reflexiones en el plano pedagógico, referidas a la necesidad de contribuir a que los alumnos desarrollen estilos de aprendizaje adaptativos, que les permitan asumir positivamente las exigencias que se derivan del nuevo ámbito de estudio, en el que es preciso crecer en la autoregulación

  3. DESERCIÓN EN ESTUDIANTES DE NUEVO INGRESO A CARRERAS DE DISEÑO. EL CASO DE LA UNIVERSIDAD DE BUENOS AIRES, ARGENTINA

    Directory of Open Access Journals (Sweden)

    Marianela Noriega Biggio

    2015-01-01

    Full Text Available El artículo presenta los resultados de una investigación acerca de los factores que inciden en la deserción y retención en la educación superior. En una muestra de 2273 alumnos del primer año de las carreras de Arquitectura, Diseño y Urbanismo de la Universidad de Buenos Aires, Argentina, que cursaron la materia de Dibujo, se aplicó un instrumento ad-hoc para evaluar la competencia espacial, el cuestionario MSLQ para evaluar los componentes del estilo de aprendizaje y se recogieron los datos demográficos y las calificaciones obtenidas por los alumnos. Se verificó que los factores de más peso en la explicación de la varianza para la deserción/retención fueron el nivel de competencia espacial en el momento de iniciar el curso, el rendimiento del primer semestre y las variables relacionadas con el estilo de aprendizaje. Además, se verificaron relaciones con factores demográficos: sexo, momento de inscripción, lugar de proveniencia y tipo de escuela media, gestión y orientación. De estos resultados surgen algunas reflexiones en el plano pedagógico, referidas a la necesidad de contribuir a que los alumnos desarrollen estilos de aprendizaje adaptativos, que les permitan asumir positivamente las exigencias que se derivan del nuevo ámbito de estudio, en el que es preciso crecer en la auto-regulación.

  4. Nuevos registros de especies del género Eretmocerus (Hymenoptera: Aphelinidae, parasitoides de Trialeurodes vaporariorum y el complejo Bemisia tabaci (Hemiptera: Aleyrodidae en Argentina New records of species of the genus Eretmocerus (Hymenoptera: Aphelinidae, parasitoids of Trialeurodes vaporariorum and Bemisia tabaci complex (Hemiptera: Aleyrodidae in Argentina

    Directory of Open Access Journals (Sweden)

    Silvia N. López

    2008-06-01

    Full Text Available El objetivo de este trabajo es dar a conocer nuevos registros y distribuciones de las especies del género Eretmocerus Haldeman, parasitoides de las dos especies de mosca blanca que tienen mayor importancia económica en cultivos hortícolas y ornamentales en Argentina. Una especie de Eretmocerus Haldeman fue hallada parasitando a Trialeurodes vaporariorum (Westwood en Santa Fe y Buenos Aires; por sus caracteres morfológicos, se encuentra en el grupo californicus, cercana a corni Haldeman, podría tratarse de una nueva especie. Asimismo, se amplía la distribución geográfica de Eretmocerus mundus Mercet, enemigo natural del complejo Bemisia tabaci (Gennadius, a las provincias de San Juan y Buenos Aires.The objective of this paper is to report new records of species of the genus Eretmocerus Haldeman, parasitoids of the most important whitefly pest species in vegetables and ornamental crops in Argentina. One species was found parasitizing Trialeurodes vaporariorum (Westwood in Santa Fe and Buenos Aires provinces and it is grouped into californicus group near corni Haldeman, due to its morphological characters. It could be a new species. The known distribution of Eretmocerus mundus Mercet, a parasitoid of Bemisia tabaci (Gennadius, is enlarged to include the provinces of San Juan and Buenos Aires of Argentina.

  5. Proficiency in radiation protection, nuclear medicine and biomedicine in the Faculty of Biochemistry and Pharmaceutics, Universidad de Buenos Aires, Argentina; Capacitacion en proteccion radiologica en medicina y biomedicina en la Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Bergoc, Rosa M.; Caro, Ricardo A.; Rivera, Elena S. [Universidad Buenos Aires (Argentina). Faculdade de Farmacia y Bioquimica. Lab. de Radioisotopos; Menossi, Carlos A. [Autoridad Regulatoria Nuclear, Buenos Aires (Argentina)

    2001-07-01

    The School of Pharmacy and Biochemistry (Buenos Aires University) offers four annual courses on Methodology of Radioisotopes (which focus on different aspect of the Radiological Protection according to whom they are aimed: 1) Course for students in the Biochemistry Cycle; 2) Course for post-Graduate in Medicine, Biochemistry, Biology, Chemists; 3) Course to up-date the knowledge; 4) Course for Technicians in Nuclear Medicine. From 1960, 5000 biochemistry students have approved Methodology of Radioisotopes. The syllabus includes aspect related to the students' future professional activities. Since 1962, 1513 (?) graduates have approved it. Training (222 h) include: dosimetric magnitudes, units, internal and external dosimetry; working conditions, contamination barriers, radioprotection philosophy and principles; limits; radioactive wastes; legal aspects, national and international legislation. Uses of commonest isotopes in Nuclear Medicine and Biomedicine are under deep analysis. Since 1992 the graduates who wish to up-date their knowledge can follow this course organized in modules to suit their needs. Since 1997 this course emphasizes the operational aspects such as: columns elution, injection of radioactive drugs to patients, decontamination of areas. The increasing in the application of radioisotopes makes necessary to encourage their use in harmony with the environmental. (author)

  6. Leaf anatomy of Medicinal Shrubs and Trees from Gallery Forests of the Paranaense Province (Argentina: Part 1 Anatomía foliar de árboles y arbustos medicinales de las selvas en galería de la provincia Paranaense (Argentina. Parte 1

    Directory of Open Access Journals (Sweden)

    Ana M. Arambarri

    2006-12-01

    Full Text Available Sixty two species of shrubs and trees belonging to 28 families inhabiting gallery forests of the Paranaense biogeographic province (Argentina have been cited with medicinal properties. The aim of this study was to provide a tool to recognize these taxa from fragmented leaf samples. Fresh material and hydrated herbarium specimens fixed in FAA were surveyed. The main differential traits are: hypodermis presence (e.g. Myrceugenia glaucescens ; stomata and trichome types (e.g. ciclocytic stomata in Baccharis spp.; cystolith-like structure in trichomes in Aloysia gratissima var. gratissima ; midvein transection outlines (e.g. midvein convex and keel-shaped on the adaxial side in Allophylus edulis , mesophyll of the leaf blade (e.g. indifferentiated in Poiretia tetraphylla ; presence of idioblastic sclereids (e.g. in the petiole of Rollinia emarginata , presence and types of crystals (e.g. crystal sand in Sambucus australis ; presence of secretory structures (e.g. large secretory cavities in Malvaceae and Myrtaceae. We can conclude that the leaf features have diagnostic value to identify species. As a result, we offer a key to distinguish these 62 species and illustrations to clarify it. Ecological interpretation of leaf structures is also given.Entre los árboles y arbustos que forman las selvas en galería de la provincia biogeográfica Paranaense (Argentina, 62 especies pertenecientes a 28 familias son citadas como medicinales. El objetivo de este trabajo es proveer elementos para el reconocimiento de estos taxones a partir de hojas fragmentadas. Para el estudio se utilizó material fresco y ejemplares de herbario recuperados y fijados en FAA. Algunos de los principales caracteres de identificación son: la presencia de una hipodermis (e.g. en Myrceugenia glaucescens ; los tipos de estomas (e.g. los estomas ciclocíticos en Baccharis spp. y de tricomas (e.g. los tricomas cistolíticos en Aloysia gratissima var. gratissima ; el contorno de la vena

  7. Lesiones en Mus musculus inoculados con Mycobacterium phlei, Mycobacterium kansasii y Mycobcterium fortuitum aislados de suelos pampeanos (República Argentina Mus musculus lesions inoculated with Mycobacterium phlei, Mycobacterium kansasii and Mycobacterium fortuitum isolated from soil of La Pampa Province (R. Argentina

    Directory of Open Access Journals (Sweden)

    D.S Oriani

    2007-12-01

    Full Text Available El objetivo de este trabajo fue determinar la capacidad para producir lesiones macro y microscópicas de nueve aislamientos de micobacterias no tuberculosas (MNT cuando eran inoculadas en ratones albinos (Mus musculus. Las micobacterias fueron aisladas de muestras de suelos destinados a la agricultura y ganadería de la provincia de La Pampa, Argentina. Se investigaron tres especies ambientales (M. fortuitum, M. phlei y M. kansasii que eran dominantes en los suelos estudiados. Los animales fueron inoculados por vía endovenosa, con una suspensión de cultivos frescos de MNT, equivalente a 1 mg de bacterias mL¹. Los animales se mantuvieron en un área restringida durante 60 días, en ese momento se les efectuó la eutanasia y la necropsia, recolectando órganos para realizar estudios bacteriológicos e histopatológicos. Las cepas de M. phlei y M. kansasii inoculadas produjeron lesiones en los ratones similares a las producidas por M. tuberculosis y/o bovis, mientras que M. fortuitum no desarrollo patogenicidad en el modelo animal utilizado bajo las condiciones en que se realizó este estudio. Es necesario continuar valorando otras micobacterias ambientales aisladas de suelos y otras vías de inoculación contribuyendo a colaborar en el diagnostico diferencial de la tuberculosis y las enfermedades granulomatosas.The study objective was to determine the capacity of originate macroscopic and microscopic lesions of nine atypical mycobacteria inoculated in albino rats. The mycobacteria were isolated from farms soil samples at different places from La Pampa province (Argentina. It was investigated the three most frequent species (M. fortuitum, M. phlei and M. kansasii. The animals were endovenously inoculated with 1 mg of bacteria/ml-¹ of fresh culture and kept in a restricted area during 60 days. After euthanasia, samples from different organs, for bacteriologic and histopathologic studies, were collected. M. phlei and M. kansasii showed lesions

  8. Estimación del número de reproducibilidad basal para la leishmaniasis tegumentar americana en dos localidades del nordeste de la Provincia de Salta, Argentina Estimation of the basic reproducibility number for American tegumentary leishmaniasis in two sitesin northeastern Salta Province, Argentina

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    Juan Carlos Rosales

    2007-11-01

    Full Text Available Un modelo matemático determinístico del tipo SIR para tres hospedadores es aplicado para analizar el proceso de transmisión de la leishmaniasis tegumentar americana, en las localidades Río Blanco y paraje Las Carmelitas, ubicadas en el Nordeste de la Provincia de Salta, Argentina, del mismo se deriva la expresión para el número de reproducibilidad basal Ro. Se implementa el modelo en ambiente MATLAB, en base a datos de las zonas endémicas se realizan simulaciones y se obtienen estimaciones numéricas de Ro. Para el caso de Río Blanco hemos obtenido el valor Ro = 4,689, mientras que para el paraje Las Carmelitas se obtuvo Ro = 1,948. Estudiando numéricamente el modelo también se estima la fuerza de infección, obteniendo para las localidades mencionadas 0,239 y 0,171 (unidad 1/año, respectivamente. Las simulaciones muestran que en la localidad de Río Blanco la fase endémica resulta más sostenida que la fase inter-epidémica presentada en el paraje Las Carmelitas. Las estimaciones obtenidas para estos parámetros epidemiológicos indican donde las instituciones del Ministerio de Salud Pública de la Provincia y de la Nación tendrán más dificultad para el control y la erradicación de la enfermedad.A SIR-type deterministic mathematical model for three hosts is applied to analyze the transmission process for American tegumentary leishmaniasis in Río Blanco and Las Carmelitas, located in northeastern Salta Province, Argentina, and to derive the expression for the baseline reproducibility number Ro. The model is implemented in the MATLAB environment, and based on data from endemic areas, simulations are performed and numerical estimations of Ro are obtained. Río Blanco shows Ro = 4.689 and Las Carmelitas Ro = 1.948. By studying the model numerically, we also estimate the force of infection, namely 0.239 and 0.171 (unit 1/year, respectively. The simulations show that in Río Blanco, the endemic phase was more sustained than the inter

  9. Presentación del estudio “Links” de hombres que tienes sexo con hombres en Buenos Aires, Argentina

    Science.gov (United States)

    Carballo-Diéguez, Alex; Ávila, María M; Balán, Iván C.; Marone, Rubén; Pando, María A.; Barreda, Victoria

    2011-01-01

    Resumen Estudios previos en Buenos Aires reportaron altas prevalencias de HIV entre HSH, con valores que oscilan entre 9 y 14% durante casi 10 años de continuo testeo. El objetivo principal de este estudio fue la evaluación de factores relacionados al comportamiento de alto riesgo para transmisión del HIV entre HSH entre los que se incluyen el conocimiento y factores emocionales, socioculturales y ambientales. Por otro lado se realizó la estimación de prevalencia e incidencia de HIV utilizando RDS (Respondent Driven Sampling), así como la presencia de otras infecciones de transmisión sexual. Por último se evaluaron los hábitos de testeo para HIV indagando que factores facilitan o impiden su realización. El estudio constó de dos fases, en primer lugar una fase cualitativa y posteriormente una fase cuantitativa con una duración total de 4 años y medio. Durante la fase cualitativa se realizaron 44 entrevistas individuales en profundidad, 8 grupos focales y 10 observaciones etnográficas (hoteles, baños públicos (“teteras”), cines pornográficos, fiestas privadas, dark rooms y discotecas). Durante la fase cuantitativa del estudio se realizó el reclutamiento de 500 participantes que provinieron de la Ciudad Autónoma de Buenos Aires, así como del Gran Buenos Aires. El reclutamiento se comenzó con 16 participantes llamados semillas. Se realizó el diagnóstico de infección por HIV, hepatitis B y C (HBV y HCV), Treponema pallidum, Virus Papiloma Humano (HPV) y Chlamidias. La colaboración establecida entre los grupos de trabajo enfocados en áreas diversas posibilitó el abordaje conjunto de nuevas estrategias de investigación antes no exploradas en nuestro país. Los resultados más relevantes de esta investigación serán progresivamente publicados en sucesivos números de Actualizaciones en SIDA. PMID:25264397

  10. Presentación del estudio "Links" de hombres que tienes sexo con hombres en Buenos Aires, Argentina.

    Science.gov (United States)

    Carballo-Diéguez, Alex; Avila, María M; Balán, Iván C; Marone, Rubén; Pando, María A; Barreda, Victoria

    2011-03-01

    Estudios previos en Buenos Aires reportaron altas prevalencias de HIV entre HSH, con valores que oscilan entre 9 y 14% durante casi 10 años de continuo testeo. El objetivo principal de este estudio fue la evaluación de factores relacionados al comportamiento de alto riesgo para transmisión del HIV entre HSH entre los que se incluyen el conocimiento y factores emocionales, socioculturales y ambientales. Por otro lado se realizó la estimación de prevalencia e incidencia de HIV utilizando RDS (Respondent Driven Sampling), así como la presencia de otras infecciones de transmisión sexual. Por último se evaluaron los hábitos de testeo para HIV indagando que factores facilitan o impiden su realización. El estudio constó de dos fases, en primer lugar una fase cualitativa y posteriormente una fase cuantitativa con una duración total de 4 años y medio. Durante la fase cualitativa se realizaron 44 entrevistas individuales en profundidad, 8 grupos focales y 10 observaciones etnográficas (hoteles, baños públicos ("teteras"), cines pornográficos, fiestas privadas, dark rooms y discotecas). Durante la fase cuantitativa del estudio se realizó el reclutamiento de 500 participantes que provinieron de la Ciudad Autónoma de Buenos Aires, así como del Gran Buenos Aires. El reclutamiento se comenzó con 16 participantes llamados semillas. Se realizó el diagnóstico de infección por HIV, hepatitis B y C (HBV y HCV), Treponema pallidum, Virus Papiloma Humano (HPV) y Chlamidias. La colaboración establecida entre los grupos de trabajo enfocados en áreas diversas posibilitó el abordaje conjunto de nuevas estrategias de investigación antes no exploradas en nuestro país. Los resultados más relevantes de esta investigación serán progresivamente publicados en sucesivos números de Actualizaciones en SIDA. PMID:25264397

  11. Presentación del estudio "Links" de hombres que tienes sexo con hombres en Buenos Aires, Argentina.

    Science.gov (United States)

    Carballo-Diéguez, Alex; Avila, María M; Balán, Iván C; Marone, Rubén; Pando, María A; Barreda, Victoria

    2011-03-01

    Estudios previos en Buenos Aires reportaron altas prevalencias de HIV entre HSH, con valores que oscilan entre 9 y 14% durante casi 10 años de continuo testeo. El objetivo principal de este estudio fue la evaluación de factores relacionados al comportamiento de alto riesgo para transmisión del HIV entre HSH entre los que se incluyen el conocimiento y factores emocionales, socioculturales y ambientales. Por otro lado se realizó la estimación de prevalencia e incidencia de HIV utilizando RDS (Respondent Driven Sampling), así como la presencia de otras infecciones de transmisión sexual. Por último se evaluaron los hábitos de testeo para HIV indagando que factores facilitan o impiden su realización. El estudio constó de dos fases, en primer lugar una fase cualitativa y posteriormente una fase cuantitativa con una duración total de 4 años y medio. Durante la fase cualitativa se realizaron 44 entrevistas individuales en profundidad, 8 grupos focales y 10 observaciones etnográficas (hoteles, baños públicos ("teteras"), cines pornográficos, fiestas privadas, dark rooms y discotecas). Durante la fase cuantitativa del estudio se realizó el reclutamiento de 500 participantes que provinieron de la Ciudad Autónoma de Buenos Aires, así como del Gran Buenos Aires. El reclutamiento se comenzó con 16 participantes llamados semillas. Se realizó el diagnóstico de infección por HIV, hepatitis B y C (HBV y HCV), Treponema pallidum, Virus Papiloma Humano (HPV) y Chlamidias. La colaboración establecida entre los grupos de trabajo enfocados en áreas diversas posibilitó el abordaje conjunto de nuevas estrategias de investigación antes no exploradas en nuestro país. Los resultados más relevantes de esta investigación serán progresivamente publicados en sucesivos números de Actualizaciones en SIDA.

  12. family farming; quantification; RENAF (registration of family farming; Argentina.

    Directory of Open Access Journals (Sweden)

    Mabel Manzanal

    2015-04-01

    Full Text Available As part of an ongoing research project, this paper discusses public policies that link family farming (FF and food security and sovereignty (FSS which have been promoted in Argentina since 2010.The objective of this research is to contribute to knowledge about developmental and territorial issues, based on the study of experiences located in the provinces of Buenos Aires and Misiones.The article contextualizes and analyzes the emergence of FF and FSS policies, as well as the differences in the ways in which they were managed and implemented in the cases selected. All of this raises the following questions: what role is assigned to FF in rural development policy? What conception of "food sovereignty" lies behind these policies? 

  13. Highlights of the ecancer/SAC First International Prostate Cancer Symposium, 11-12 March 2016, Buenos Aires, Argentina.

    Science.gov (United States)

    Villalba, Marcelo Blanco; Bramajo, Marina; Bruno, Mario

    2016-01-01

    The ecancer/SAC First International Prostate Cancer Symposium, held in Buenos Aires, included national, regional, and international experts in the field of prostate cancer. More than 200 professionals from a variety of areas (clinical urologists, pathologists, oncologists, biologists, imaging specialists, radiation therapists, and generalist doctors, among others) attended, and they proposed multidisciplinary management of prostate pathology from the start in concordance with the ideas set forth by the organising committee. A radiotherapy workshop was also held during the symposium, in which new techniques and their possible uses were specifically discussed. In addition to the local doctors, Dr Lilian Faroni (COI Group, Rio de Janeiro, Brazil), Dr Leonardo Carmona (Chilean Head and Neck Institute, Chile), and Dr Anthony Addesa (Jupiter Medical Centre, Florida, USA) also participated in this symposium. PMID:27350786

  14. Detección molecular de virus de encefalitis de Saint Louis en mosquitos de Buenos Aires, Argentina

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    Fernando J Beltrán

    2014-12-01

    Full Text Available Durante el mes de marzo de 2013 una población de palomas torcazas (Zenaida auriculata se instaló en una zona céntrica de la ciudad de Buenos Aires. Conociendo el rol que poseen estas aves como hospedadores competentes del virus de la encefalitis de Saint Louis (SLEV, fue colocada en el lugar una trampa de luz tipo CDC, a fin de realizar una vigilancia entomológica. Durante ese mes,fueron capturados 5 grupos de mosquitos (n = 48, 3 correspondieron a la especie Culex pipiens (n = 10 y 2 a Culex spp.(n = 38, no pudiéndose determinar en estos últimos con precisión la especie por encontrarse dañados. En un grupo de mosquitos Culex spp. se detectó el SLEV por técnicas moleculares. Posteriormente fue secuenciado y clasificado como perteneciente al genotipo III.

  15. Riesgos de trabajo en veterinarios del centro-oeste de la provincia de Santa Fe, Argentina Occupational risks in veterinarans from the central-west area of Santa Fe province, Argentina

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    H.D Tarabla

    2009-06-01

    Full Text Available Se estimaron las frecuencias de accidentes ocupacionales y zoonosis, incapacidad laboral y uso de elementos de protección mediante encuestas telefónicas con cuestionario estructurado en 94 Veterinarios del centro-oeste santafesino. El 75,5% sufrió accidentes laborales en el año previo, y sólo el 7,4% no había tenido al menos uno a lo largo de su trayectoria profesional. Las lesiones más frecuentes fueron punzaduras, contusiones, hematomas, escoriaciones y heridas cortantes causadas por animales, agujas y tránsito vehicular. El 39,4% tuvo accidentes in itinere, la mayoría por tránsito vehicular. El 55,3% requirió atención médica y un tercio sufrió pérdidas de días de trabajo, con un promedio de 25,2±29,6 días por profesional accidentado. En los 12 meses previos a la encuesta se produjeron dos casos de brucelosis (2,9%, mientras que el 28,7% manifestó padecer o haber padecido alguna zoonosis en algún momento de su trayectoria profesional, siendo la brucelosis la más frecuente. El uso de elementos de protección fue claramente insuficiente. Aunque el 53,2% padecía alguna patología atribuible al ejercicio profesional, el 74,5 % manifestó no haber recibido capacitación alguna sobre peligros ocupacionales. La necesidad de capacitación específica en este área aparece como primordial para minimizar los riesgos.The frequency of occupational accidents, zoonosis, lost of work days, and protective practices were estimated by means of telephone interviews using a structured questionnaire on 94 Veterinarians from Central-West Santa Fe Province. Seventy six percent suffered occupational accidents on the previous year, while only 7,4% did not have a single accident throughout their careers. Most frequent lesions were punctures, concussions, haematomas, abrasions, and cutting injuries caused by animals, needles and traffic. Thirty nine percent suffered accidents in itinere, mostly due to traffic. Fifty five percent required medical

  16. Los depósitos de bentonita de Barda Negra y cerro Bandera, departamento Zapala, provincia del Neuquén, Argentina Bentonite deposits of Barda Negra and Cerro Bandera, Zapala Department, Neuquén Province, Argentina

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    A. Impiccini

    2002-09-01

    Full Text Available Las bentonitas de la región nordpatagónica pueden ser agrupadas en dos distritos mineralogenéticos caracterizados desde el punto de vista geológico, geográfico y estratigráfico. En este trabajo se considera a las bentonitas terciarias localizadas en la región occidental, en el departamento Zapala, provincia del Neuquén. Los depósitos consisten en estratos lenticulares, subhorizontales, de 2 a 15 metros de espesor, la mayoría de ellos aflorantes. Están incluidos en la Formación Collón Curá, una secuencia miocena continental donde alternan tobas y areniscas. Los cuerpos de arcilla son productos de alteración de materiales piroclásticos vítreos en ambientes húmedos confinados, tales como cuerpos de agua someros. Los análisis por difracción de rayos X muestran que prevalece una esmectita dioctaédrica - montmorillonita - como único mineral arcilloso en la mayoría de los depósitos. Los minerales accesorios son cuarzo, feldespato, plagioclasa y cristobalita (ópalo-CT, y en menor proporción, ceolitas y yeso. El Na+ es el ión intercambiable dominante, junto con Ca++, Mg++ y K+. El contenido en Fe2O3 es muy alto. Estas bentonitas son buenos agentes ligantes en arenas de moldeo para fundición, pero sus propiedades reológicas y el test de filtrado no cumplen exactamente con las normas API para lodos de perforación de petróleo.Bentonites from the North Patagonia region can be grouped in two mineralogenic districts distinguishable on geological, geographical, and stratigraphical criteria. In this paper, we consider the Tertiary bentonites located in the western region, Zapala Department, Neuquén Province. The deposits occur in sub-horizontal lenticular beds, 2 to 15 m in thickness, most of which crop out at the surface. They lie within the Collón Curá Formation, a Miocene continental sequence of alternating tuffs and sandstones. The clay bodies are alteration products of pyroclastic glassy materials in confined wet

  17. Nuevos registros de ácaros oribátidos (Acari: Oribatida para la Argentina New records of oribatid mites (Acari: Oribatida for Argentina

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    Cecilia Accattoli

    2010-12-01

    Full Text Available Esta publicación constituye un aporte al conocimiento del elenco oribatológico en suelos de Argentina, basado en relevamientos realizados en un parque urbano de la ciudad de La Plata, Buenos Aires. Se informan dos nuevas citas de géneros, una de subgénero y siete de especies para el país. Además, cinco de las especies halladas serían nuevas para la ciencia. Se incorporan ocho géneros y siete especies a las registradas para la Provincia de Buenos Aires.This paper is a contribution to the knowledge of assemblages of oribatid mites in soils of Argentina. The study is based on samples from an urban forest in the city of La Plata, Buenos Aires. New records for the country are provided for two genera, one subgenus and seven species. Furthermore, five of the species found are possibly new to science. Eight genera and seven species are incorporated to the record of the Buenos Aires province.

  18. Federalismo y políticas ambientales en la Región Metropolitana de Buenos Aires, Argentina

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    Ricardo A Gutiérrez

    2012-05-01

    Full Text Available La articulación entre la escala metropolitana de los problemas y la multiplicidad de jurisdicciones gubernamentales constituye un desafío para cualquier política ambiental. Centrado en la Región Metropolitana de Buenos Aires, este trabajo aborda la coordinación de políticas ambientales metropolitanas en un contexto federal. La primera parte describe la región metropolitana, el modo en que el federalismo argentino distribuye competencias ambientales entre niveles de gobierno, los mecanismos institucionales para la gestión metropolitana y las características y principales deficiencias de las organizaciones interjurisdiccionales que operan en la región metropolitana. La segunda parte discute los factores que explican esas deficiencias. Se argumenta que las fallas de coordinación metropolitana de políticas ambientales se explican por la interacción entre las instituciones federales y otras variables del sistema político, como la lógica de acumulación partidaria, la configuración de las agendas de gobierno, el papel de las burocracias estatales y el impacto del activismo ambiental.In any metropolitan region, the articulation between metropolitan scale of issues and the multiplicity of government jurisdictions poses a challenge for the implementation of environmental policies. Focused on the Buenos Aires Metropolitan Region, this article examines the coordination of metropolitan environmental policies in a federal context. The first part describes the metropolitan region and its main environmental problems, the way in which Argentine federalism assigns environmental competences to the different government levels and the mechanisms it sets for metropolitan governance, and the characteristics and flaws of the inter-jurisdictional organizations at work in the metropolitan region. The second part discusses the factors explaining those flaws. It argues that the shortcomings of the metropolitan coordination of environmental policies are

  19. El uso de la televisión en comunidades educativas.: Estudio cualitativo en Buenos Aires, Argentina 0 uso da televisão em comunidades educativas: Estudo qualitativo em Buenos Aires, Argentina The Use of Television in Educational Communities: A Qualitative Study in Buenos Aires, Argentina

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    Patricia Nigro

    2011-04-01

    Full Text Available Se presentan los resultados de un estudio acerca del uso de la televisión en las comunidades educativas de escuelas primarias de clase media de la ciudad de Buenos Aires. Los objetivos fueron: describir las relaciones que surgen cuando se dialoga con padres, docentes y alumnos acerca de qué es la televisión y cómo la utilizan los niños de la clase media porteña. El método empleado fue el cualitativo. Se realizaron 63 entrevistas profundas, a docentes, padres y alumnos de cuarto y quinto grados (de 9 y 10 años, y posteriormente se categorizaron las respuestas para su análisis. Entre las conclusiones se encontró que los educadores (padres y maestros no pueden ponerse de acuerdo sobre cuáles son las influencias educativas de la televisión en los niños; que los padres sienten que son responsables de los consumos mediáticos de sus hijos, y que los niños consumen gran cantidad de programas para adultos.Este artigo apresenta os resultados de um estudo sobre o uso da televisão nas comunidades educativas de escolas de ensino de primeiro grau da classe média na cidade de Buenos Aires. Os objetivos foram descrever as relações que surgem ao dialogar com pais, professores e alunos sobre o que é televisão e como a utilizam as crianças de classe média de Buenos Aires. O método foi qualitativo. Foram realizadas 63 entrevistas em profundidade a professores, pais e alunos de quarto e quinto garus (9 e 10 anos. As respostas foram categorizadas para análise. Entre os resultados verificou-se que os educadores (pais e professores não pode concordar em quais são as influências educativas da televisão sobre as crianças; os pais sentem que são responsáveis pelo consumo mediático de seus filhos; as crianças consomem grandes quantidades de programas para adultos.The results of a study on the use of television in the educational communities of middle-class elementary schools in the city of Buenos Aires are presented in this article. The

  20. Espacios de encuentros y participación en busca de la construcción de un proceso de aprendizaje colectivo. : Estudio de caso: El sistema educativo del distrito de Punta Indio, provincia de Buenos Aires, Argentina

    OpenAIRE

    Rossi, Elisabet; Molinari, Gloria

    2012-01-01

    El presente trabajo se basa en una experiencia de extensión universitaria desarrollada en el territorio de Punta Indio, distrito de la provincia de Buenos Aires, Argentina, atendiendo a las necesidades detectadas en el sistema educativo distrital dependiente de la Dirección General de Cultura y Educación de la provincia mencionada. Se planteó como objetivo, el diseño de una estrategia local de construcción colectiva de desarrollo turístico en la región, a partir de la participación activa de ...

  1. Groundwater in the hydrological functioning of wetlands in the Southeast of Buenos Aires Province, Argentina; El agua subterranea en el funcionamiento hidrologico de los humedales del Sudeste Bonaerense, Provincia de Buenos Aires, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Romanelli, A.; Quiroz, O.M.; Massone, H.E.; Martinez, D.E.; Bocanegra, E.

    2010-07-01

    The understanding of the hydrological functioning and the interaction among the different water bodies in an area is essential when a sustainable use of the hydric resources is considered. The hydrogeochemical interpretation of representative water-sample analyses is a useful tool developed for the analysis of hydrological systems. Isotopic techniques are also important tools for the validation and adjustment of conceptual hydrogeological models. The aim of the present paper is to develop depth of knowledge of the conceptual hydrogeological models for wetlands of the Pampa Plain by using hydrochemical and stable isotopic techniques. Three wetlands of different origin were sampled for hydrochemical and stable isotopic analysis (18O and 2H) at different depths. Groundwater and streams were also sampled. Hydrochemical analysis classified La Brava and Los Padres basins as sodium bicarbonate waters, and La Salada Basin as sodium chloride bicarbonate waters. Differences in the isotopic fingerprints and the electrical conductivity values were evident among wetlands: 6.766,8, 762,2 y 647,8 iS/cm in La Salada, Los Padres and La Brava respectively. Hydrochemical and isotopic data allowed us to define the effluent-influent behavior of these wetlands, their main recharge sources and their importance as aquifer recharge areas. (Author).

  2. Diversidad de oribátidos (Acari: Oribatida del "Paseo del bosque", La Plata (Buenos Aires, Argentina Diversity of oribatid mites (Acari: Oribatida from «Paseo del bosque», La Plata (Buenos Aires Province, Argentina

    Directory of Open Access Journals (Sweden)

    Ana Salazar Martínez

    2010-12-01

    Full Text Available Se compararon las taxocenosis de oribátidos de dos sitios con distinto tipo de uso antrópico en un bosque urbano, durante un ciclo anual. Los relevamientos se realizaron mensualmente y la fauna fue extraída con embudos Berlese. La densidad promedio anual en el sitio de uso recreativo menos frecuente (sitio 1, fue significativamente mayor que la del sitio de paso obligatorio en el acceso al Paseo del Bosque y con deterioro evidente por el uso (sitio 2. Las especies características de ambos sitios son compartidas y la diversidad y riqueza específica no son significativamente diferentes. La mayor intensidad de uso por parte del hombre coincide con menor densidad de la taxocenosis en general.Oribatid assemblages from two sites differing in their degree of disturbance by human intervention were compared during an annual cycle. Sampling was carried out at monthly intervals and individuals were extracted using Berlese funnels. Annual average density in the less disturbed location (site 1 was significantly higher than that observed in the site exhibiting high perturbation as a result of human intervention at «Paseo del Bosque» (site 2. Species composition, richness and diversity did not differ significantly between the sampled sites. Site 2 showed lower overall density than site 1.

  3. Parasitismo larval de Crocidosema (=Epinotia aporema (Lepidoptera: Tortricidae en el noreste de la provincia de Buenos Aires (Argentina

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    Gerardo LILJESTHRÖM

    2005-01-01

    Full Text Available En la interacción huésped-parasitoide las plantas suelen emitir señales capaces de aumentar la eficiencia de los parasitoides. Las larvas de Crocidosema (=Epinotia aporema (Walsingham se alimentan endofíticamente de leguminosas herbáceas y constituyen una plaga de la soja (Glycine max Merrill. En este estudio analizamos el parasitismo larval de C. aporema en Melilotus albus Medikus, Galega officinalis L, Lupinus albus L y G. max, en el noreste de Buenos Aires. La densidad larval fue mayor en L. albus (109,2 larvas/m2 que en las restantes leguminosas: 3,7; 6,9 y 11,3 en M. albus, G. officinalis y G. max, respectivamente. Sin embargo, el parasitismo y número de especies parasitoides fueron menores en L. albus (9,5% por el ectoparasitoide generalista Bracon sp. que en M. albus (32,6%, Bracon sp. y los endoparasitoides Trathala sp.y Bassus sp.; G. officinalis y G. max (26,4% y 50,6% respectivamente, con Trathala sp. y Bracon sp. en ambas. Lupinus albus fue la única especie vegetal que reaccionó a la alimentación de C. aporema con producción de exudados pegajosos y olorosos que podrían haber repelido los endoparasitoides, actuando como un refugio parcial para C. aporema. Además, al ser positivamente seleccionada por C. aporema, esta leguminosa podría utilizarse como franja trampa para su control en cultivos de soja, de manera compatible con tácticas de control biológico por conservación de enemigos naturales.

  4. Fluctuación poblacional del minador de la hoja de los cítricos y su parasitoide exótico Ageniaspis citricola en la provincia de Tucumán, Argentina Population fluctuation of the citrus leafminer and its imported parasitoid, Ageniaspis citricola, in the province of Tucumán, Argentina

    Directory of Open Access Journals (Sweden)

    Lucía Goane

    2007-12-01

    Full Text Available La presencia del minador de los cítricos Phyllocnistis citrella Stainton en la provincia de Tucumán, Argentina, planteó nuevos problemas para el manejo fitosanitario de las quintas cítricas en producción. Actualmente una de las principales herramientas de control de esta plaga es el parasitoide específico Ageniaspis citricola Logvinovskaya, introducido desde Perú en 1998. Con el propósito de definir estrategias de manejo adecuadas para esta plaga, se evaluó la fluctuación poblacional del minador de los cítricos y el parasitismo producido por A. citricola en diferentes puntos de la provincia. Para ello, se realizaron muestreos quincenales entre los meses de noviembre y abril durante cuatro campañas cítricas consecutivas en plantaciones de limonero ubicadas en la zona norte y sur de Tucumán. La infestación del minador se calculó a partir de la observación de brotes con hojas tiernas susceptibles al ataque, y el parasitismo se evaluó analizando cámaras pupales del minador tomadas de hojas maduras. En la zona norte de la provincia la infestación del minador alcanzó valores más elevados comparados con la zona sur. Las mayores tasas de parasitismo de A. citricola registradas en la zona sur, resultaron en una disminución anticipada de la infestación del minador, la cual tuvo lugar a mediados del verano. En esta última, los niveles de parasitismo de A. citricola fueron superiores. La temperatura media fue el factor meteorológico que mejor correlacionó con la fluctuación del minador, y la humedad relativa, con el parasitismo de A. citricola.Presence of citrus leafminer Phyllocnistis citrella Stainton in Tucumán province, Argentina, raised new problems for the phytosanitary management of citrus producing orchards. At present, one of the main tools used to control this pest is the specialized parasitoid Ageniaspis citricola Logvinovskaya, imported from Perú in 1998. With the aim to define adequate management strategies to

  5. A new species of Rhytidognathus (Carabidae, Migadopini from Argentina

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    Sergio Roig-Junent

    2012-11-01

    Full Text Available The Migadopini are a small tribe of Carabidae with 47 species that occur in South America, Australia, and New Zealand, in the sub-Antarctic areas. In South America, most of the genera inhabit areas related to sub-Antartic Nothofagus forest except two monogeneric genera, the Ecuadorian genus Aquilex Moret and the Pampean genus Rhytidognathus Chaudoir. These two genera are geographically isolated from the remaining five South American genera. New material of Rhytidognathus from the northeast of Buenos Aires province and from Entre Ríos province permits establishing that the previous records of Rhytidognathus ovalis (Dejean for Argentina were erroneous and that it belongs to a new species. Based on external morphological characters and from male and female genitalia we describe Rhytidognathus platensis as a new species. In this contribution we provide illustrations, keys, habitat characteristics and some biogeographic considerations on the distribution of Rhytidognathus.

  6. en Argentina

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    Patricia Davolos

    2005-01-01

    Full Text Available Hacia finales de la década pasada comienza a cobrar dinamismo la protesta social en Argentina como respuesta a la crisis resultante de las políticas neoliberales que dominaron la escena nacional en los noventa. En ese contexto, grupos de trabajadores ocupan empresas en riesgo de cerrar sus puertas, organizándose para operarlas en forma autogestionaria. Aquí se estudian las características del mercado de trabajo, así como las tradiciones y los recursos que permitieron a los trabajadores llevar adelante este tipo de acciones, delineando distintas trayectorias que otorgaron inteligibilidad al fenómeno analizado.

  7. Oil and democracy in Argentina, 1916-1930

    International Nuclear Information System (INIS)

    Argentine society in the 1920s experience strong political, cultural, and economic divisions between the littoral regional surrounding Buenos Aires and the interior provinces to the west and north. Economic recession through World War 1 sparked efforts to wean the economy from total dependence upon agricultural production and export, and petroleum deposits in the south and northwest corners of Argentina offered a wider economic base. Regional conflict quickly arose concerning oil production and control over oil revenues. By mounting a popular anti-imperialist campaign against Standard Oil of New Jersey, the primary interior oil producer, dominant political forces in Buenos Aires worked to nationalize all oil deposits to the detriment of interior provincial interests. To maintain the kinds of political control necessary to fend off this threat, interior conservatives reverted to electoral fraud and violence, especially in the major oil-producing province of Salta. This thesis reconstructs and analyzes the process by which political division on the oil issue hardened and gave way to a conservative reaction leading to an authoritarian regime

  8. A new species of Paraberrapex Jensen, 2001 (Cestoda: Lecanicephalidea) from Squatina guggenheim Marini (Squatiniformes: Squatinidae) off Argentina.

    Science.gov (United States)

    Mutti, Leonardo D; Ivanov, Veronica A

    2016-01-01

    Paraberrapex atlanticus sp. n. (Cestoda: Lecanicephalidea) is described from the spiral intestine of the angel shark Squatina guggenheim Marini from coastal waters off Buenos Aires Province, Argentina. Paraberrapex atlanticus sp. n. can be distinguished from the only species described in the genus, P. manifestus Jensen, 2001 in having cocoons 5-6 times longer with more eggs per cocoon, the extension of the uterine duct, the distribution of vitelline follicles, and the size and density of microtriches on the bothridial surfaces. The presence of P. atlanticus sp. n. in S. guggenheim confirms the specificity of Paraberrapex Jensen, 2001 for squatiniform sharks. PMID:27080495

  9. Ticks infesting humans in Northern Misiones, Argentina.

    Science.gov (United States)

    Lamattina, Daniela; Nava, Santiago

    2016-01-01

    This work presents records of ticks infesting humans in northern Misiones Province, Argentina. Also, notes on potential transmission of tick-borne pathogens are included. A total of 282 ticks attached to researchers were collected and identified by their morphological characters. Eight tick species were found: Amblyomma brasiliense, Amblyomma coelebs, Amblyomma dubitatum, Amblyomma incisum, Amblyomma ovale, Haemaphysalis juxtakochi, Rhipicephalus sanguineus and Rhipicephalus microplus. Some of these species as A. dubitatum, A. ovale and R. sanguineus have been found infected with spotted fever group rickettsiae pathogenic to humans in Brazil and Argentina. The potential role as vectors of humans pathogens of the ticks found attached to humans in this study is discussed.

  10. Low frequency of male circumcision and unwillingness to be circumcised among MSM in Buenos Aires, Argentina: association with sexually transmitted infections

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    María A Pando

    2013-06-01

    Full Text Available Objective: The aims of this study were to investigate the frequency of male circumcision among men who have sex with men (MSM in Buenos Aires, Argentina; the association between circumcision and sexually transmitted infections (STIs; and, among those uncircumcised, the willingness to be circumcised. Methods: A cross-sectional study was conducted among 500 MSM recruited through the respondent-driven sampling (RDS technique. Participants underwent a consent process, responded to a Web-based survey that included questions on demographic information, sexual behaviour, and circumcision and provided biological samples. HIV, hepatitis B virus (HBV, hepatitis C virus (HCV, Treponema pallidum, and human papiloma virus (HPV diagnoses were performed using standard methodologies. For all analyses, data were weighted based on participants’ network size. Results: Only 64 (13% of the 500 MSM in our study reported being circumcised. Among uncircumcised men (n=418, 302 (70.4% said that they would not be willing to get circumcised even if the procedure could reduce the risk of HIV infection. When considering all participants, circumcision status was not significantly associated with HIV, HBV, HCV, T. pallidum or HPV infections. However, when we restricted the sample to men who do not practice receptive anal intercourse (RAI and compared circumcised to uncircumcised men, the former (N=33 had no cases of HIV infection, while 34 of 231 (14.8% uncircumcised men were HIV positive (p=0.020. Regarding HPV, uncircumcised men had a significantly larger number of different HPV types compared with circumcised men (mean 1.83 vs. 1.09, p<0.001 and a higher frequency of high-risk-HPV genotypes (47.6% vs. 12.5%, p=0.012. Conclusions: Consistent with international evidence, male circumcision appears to have a partial protective effect among MSM. The efficacy of circumcision in reducing risk of HIV infection among MSM appears to be correlated with sexual practices. Given the

  11. Innovative practices in Psychiatry. Argentina, 1960-1970

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    Aida Alejandra Golcman

    2012-09-01

    Full Text Available The paper analyzes innovative psychiatric practices that took place in Argentina during the sixties and seventies at the Hospital Jose Esteves in the province of Buenos Aires. Objective: To present the coexistence of different paradigms related to mental health in the same institution and to analyze the complexities generated by this scenario. Methodology: This study uses primary sources in the form of medical records of patients admitted to the hospital between 1960 and 1979. The medical records were cross-referenced with publications of newspapers and magazines of the time. Results: The analysis shows that the political environment during the era of military dictatorship —characterized by ideological persecution and the inhibition of political expression— influenced the development of innovative psychiatric practices. At the same time, instances of anti-Semitism and ideological persecution among health workers affected therapeutic approaches. Conclusions: While the introduction of innovative practices in mental health led to some resistance among the more orthodox psychiatrists, the presence of different paradigms shows a plan, both political and professional, to transform psychiatry and admission policy in Argentina.

  12. Política legislativa y trabajo en la horticultura del Área Metropolitana de Buenos Aires (Argentina: Orígenes y continuidades de la precarización laboral en la horticultura Legislative Policy and Work in Horticulture in the Metropolitan Area of Buenos Aires (Argentina.: Origins and Continuities of Labor Precarization in Horticulture

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    Matías García

    2011-04-01

    Full Text Available El artículo consta de un análisis de la legislación laboral agraria argentina en general, y del trabajo hortícola del área metropolitana bonaerense en particular. El periodo bajo estudio se circunscribe desde la sanción del Estatuto del Peón hasta la actualidad. Se concluye que el desconocimiento de la legislación laboral agraria, el no cumplimiento de la misma -como mayoritariamente ocurre con los asalariados- y la indefinición de algunos marcos regulatorios -como sucede con la mediería- es responsable de una prácticamente total precarización del trabajo en la horticultura bonaerense. La presencia de Trabajadores -en su mayoría migrantes bolivianos- en desigualdad de fuerzas ante los productores, con un gremio poco presente y un Estado bastante ausente, no hacen más que continuar damnificando a un sujeto tradicionalmente desprotegido.The article consists of an analysis of Argentinean legislation on agrarian work in general and horticultura! work in the Buenos Aires metiopolitan area in particular. The period spans the sanction of the Workers' Statute to the present. It concludes that ignorance of agrarian labor legislation and failure to comply with it, as usually happens with salaried worker, and the lack of definition of certain regulatory frameworks -as happens in sharecropping- is responsible for the virtually total precarization of work in Buenos Aires horticulture. The presence of workers, mosr of whom are Bolivian migrants, at a disadvantage in relation to producers and with an ineffectual trade union and an absent state, continues to victimize a traditionally unprotected subject.

  13. Economic evaluation of a 100% smoke-free law on the hospitality industry in an Argentinean province Evaluación económica sobre las ventas del sector gastronómico después de una ley de ambientes 100% libres de humo en una provincia argentina

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    Carlos Candioti

    2012-06-01

    Full Text Available OBJECTIVES: To assess the economic impact of a 100% smoke-free law on bars and restaurants in an Argentinean province. MATERIALS AND METHODS: We conducted a time series analysis of restaurant and bar revenues in the province of Santa Fe 31 months before and 29 months after the implementation of the 100% smokefree environment law. The neighboring province of Entre Rios without smoking restrictions at the time of this study, was used as the control province. RESULTS: Average taxable revenues post-legislation in the province of Santa Fe as a whole and in the two most important cities were higher when compared to the total provincial revenue pre-legislation. No significant differences were observed with the total revenue from the province of Entre Rios. CONCLUSIONS: We found no statistically significant evidence that the 100% smoke-free environment legislation in the province of Santa Fe, Argentina, had a negative impact on the revenues of local bars and restaurants.OBJETIVOS: Evaluar el impacto económico de una ley de ambientes 100% libres de humo de tabaco sobre las ventas de bares y restaurantes en una provincia argentina. MATERIAL y MÉTODOS: Se realizó un análisis de serie temporal sobre las ventas de bares y restaurantes en Santa Fe, 31 meses antes y 29 meses después de la ley. Se utilizó a la provincia vecina de Entre Ríos, sin ley en el momento del estudio, como provincia control. RESULTADOS: El promedio de ventas post-ley tanto en la provincia de Santa Fe como en sus dos ciudades más importantes fue mayor al compararse con el promedio provincial total pre-ley. No se observaron diferencias significativas en las ventas totales al ser comparadas con la provincia de Entre Ríos. CONCLUSIONES: No se demostró evidencia estadísticamente significativa sobre el impacto negativo de la legislación de ambientes 100% libres de humo sobre las ventas de bares y restaurantes en la provincia de Santa Fe.

  14. Disinfectant-resistant bacteria in Buenos Aires city hospital wastewater Resistência bacteriana a desinfetantes em efluentes de um hospital em Buenos Aires, Argentina

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    L. Nuñez

    2007-12-01

    Full Text Available Large quantities of disinfectants are used in hospitals, externally on human skin or to eliminate microorganisms from inanimate objects. After use, residual quantities of these products reach the wastewater, exposing the bacteria that survive in hospital wastewaters to a wide range of biocides that could act as a selective pressure for the development of resistance. Increasing attention has been directed recently to the resistance of bacteria to disinfectants. The aim of this paper was to determine the disinfectant bacterial resistance pattern of the microflora released to the urban sewer system by hospital effluents. The characterization of the waste water microflora was performed by determination of the CFU of heterotrophic bacteria, fecal indicator bacteria, Pseudomonas sp. and Staphylococcus sp., in a Buenos Aires hospital effluent. The bacterial resistance to the disinfectants more frequently used in the hospital practice, glutaraldehyde, chlorhexidine and povidone-iodine, was then evaluated. Disinfectant resistant bacterial strains were isolated and typified. Between 10³ and 10(6 chlorexidine resistant bacteria/100 mL were isolated from the samples. Bacteria resistant to other disinfectants ranged between 10³ and 10(4 /100 mL. The bacterial population resistant to desinfectants to was mainly composed by Enterobacteriaceae, Staphylococcus spp, and Bacillus spp, which are highly associated to nosocomial infections. The results obtained show that the hospital effluents are of importance in the bacterial resistance selection process, particularly in the case of disinfectants.Os hospitais utilizam uma grande quantidade de desinfetantes para eliminar microorganismos tanto da pele humana como de superfícies inanimadas. Após sua utilização, esses produtos podem chegar ao esgoto em quantidades residuais. A pressão seletiva exercida pelos antimicrobianos nos efluentes hospitalares propicia a disseminação de linhagens resistentes. Além dos

  15. Mapeo de desmontes en áreas de bosque nativo de la provincia de Entre Ríos, Argentina / Mapping of forest clearance in natural areas of Entre Ríos province, Argentine

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    Francisco Darío Maldonado

    2012-10-01

    Full Text Available El objetivo de este trabajo fue evaluar la aplicación de una metodología de detección y monitoreo de los desmontes, resistente a la irregularidad de la adquisición de imágenes en la región del Espinal entrerriano. El monitoreo de los cambios de uso y cobertura de las tierras es actualmente necesario para la política gubernamental de manejo y conservación de los recursos naturales. El área de estudio fue el Departamento Feliciano al norte de la Provincia de Entre Ríos, región noreste de Argentina. La vegetación es la típica formación arbórea del Espinal entrerriano sometido a la actividad ganadera extensiva. La metodología usó imágenes Landsat TM para formar un paquete multitemporal de bandas espectrales de la imagen de la segunda fecha y una banda intensidad del cambio obtenida por la técnica RCEN. Sobre este paquete se aplicó una técnica de “segmentación de imágenes por crecimiento de regiones” con semillado manual. Finalmente, se realizó el agrupamiento temático basado en la interpretación visual. En total, fueron detectados 1680ha desmontadas entre agosto de 2009 y diciembre de 2010, y 1140ha desmontadas entre diciembre de 2010 y abril de 2011. La segmentación de imágenes con bandas “intensidad del cambio” con semillado manual obtuvo buenos resultados para la detección de desmontes. Este resultado fue corroborado por la fiscalización in situ de los organismos gubernamentales.AbstractThe objective of this study was to evaluate the application of a methodology for detecting and monitoring forest clearance. The methodology should be unaffected to irregular image acquisition in the region of the “Espinal” (thorn forest in northeastern Argentina. Monitoring changes in land use and cover is needed for government policies of conservation and management of natural resources. The study area was the Department Feliciano northern of Entre Rios province. The typical vegetation is Espinal thorn forest, subjected

  16. Análisis de la ocurrencia de la Mortalidad Materna en la Provincia de Santa Fe - Argentina, a propósito de una intervención Occurrence analysis of Maternal Mortality in the Province of Santa Fe - Argentina, due to an intervention

    Directory of Open Access Journals (Sweden)

    Eduardo Gustavo Elizalde

    2004-12-01

    donde aparecía la Hipertensión Arterial ocupando el primer lugar. CONCLUSIÓN: La introducción del "ITEM 33" en el Certificado de Defunción de la Provincia de Santa Fe produjo modificaciones importantes en los datos sobre MM. Estas modificaciones pueden ser atribuidas a la disminución del subregistro, ya que no se encuentran razones valederas para pensar en un aumento real en la ocurrencia de muertes maternas. Por lo cual se concluye que: este instrumento de recolección de datos permitiría corregir el subregistro y obtener datos de mayor calidad que, en consecuencia, posibiliten la implementación de políticas y programas de salud basados en datos que reflejen la verdadera situación sanitaria.INTRODUCTION: Maternal Mortality (MM shows differences in population health and life conditions, therefore it becomes not only a good socioeconomic indicator but also an indicator of health service providers and health care service quality in the assistance to women at reproductive age. Official Health Statistics do not reveal the size of MM problem due to the under-report that has this death cause. This deficiency or lack of data is highly marked especially in underdeveloped countries. It has been estimated that Argentina is not out of this under-report problem. In 1994, the Province of Santa Fe decided to add a specific ITEM to the Death Certificate for Maternal Death cause with the aim of amending the under-report. OBJECTIVES: The main objective of this study was to evaluate changes that Maternal Mortality Ratio (MMR registered between 1988 and 2001 as a consequence of adding the "33 ITEM" regarding Maternal Death to the Death Certificate of the Province of Santa Fe from 1995 on. MATERIAL AND METHODS: Bibliography was reviewed as regards the MM under-report. The MM occurrence in the Province of Santa Fe was studied from 1988 to 2001. Changes produced by the 33 ITEM appearance in the Death Certificate of the Province of Santa Fe during the period 1995 - 2001 were

  17. Means to improve access to justice and legally empower victims of domestic violence: An empirical legal study on legislation and legal offices in Buenos Aires, Argentina

    NARCIS (Netherlands)

    Marotta, J.

    2014-01-01

    The purpose of this study is to understand how recent legal reforms and the creation of legal offices in Argentina may improve access to justice and legally empower victims of domestic violence. The paper looks into the way the judicial system developed to provide suitable options for victims of dom

  18. Soft rocks in Argentina

    Institute of Scientific and Technical Information of China (English)

    Giambastiani; Mauricio

    2014-01-01

    Soft rocks are a still fairly unexplored chapter in rock mechanics. Within this category are the clastic sedimentary rocks and pyroclastic volcanic rocks, of low to moderate lithification (consolidation, cemen-tation, new formed minerals), chemical sedimentary rocks and metamorphic rocks formed by minerals with Mohs hardness less than 3.5, such as limestone, gypsum, halite, sylvite, between the first and phyllites, graphitic schist, chloritic shale, talc, etc., among the latter. They also include any type of rock that suffered alteration processes (hydrothermal or weathering). In Argentina the study of low-strength rocks has not received much attention despite having extensive outcrops in the Andes and great impact in the design criteria. Correlation between geomechanical properties (UCS, deformability) to physical index (porosity, density, etc.) has shown promising results to be better studied. There are many studies and engineering projects in Argentina in soft rock geological environments, some cited in the text (Chihuído dam, N. Kirchner dam, J. Cepernic Dam, etc.) and others such as International Tunnel in the Province of Mendoza (Corredor Bioceánico), which will require the valuable contribution from rock mechanics. The lack of consistency between some of the physical and mechanical parameters explored from studies in the country may be due to an insufficient amount of information and/or non-standardization of criteria for testing materials. It is understood that more and better academic and professional efforts in improv-ing techniques will result in benefits to the better understanding of the geomechanics of weak rocks.

  19. Patagonia Argentina

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    A.J. Acuña

    2008-01-01

    Full Text Available La zona central de la Patagonia, Argentina, se encuentra sometida a explotación petrolera y sus suelos se caracterizan por ser deficientes en nitrógeno. Esto causaría un efecto negativo en los procesos de atenuación natural que se desarrollan en los suelos contaminados con hidrocarburos. El objeto de este estudio fue determinar cual es el efecto de la deficiencia de nitrógeno sobre la biodegradación de los hidrocarburos en un suelo de la Patagonia, Argentina. Se trabajó con tres microcosmos a los que se les realizó tratamientos diferentes. En uno se monitoreo la atenuación natural del sistema, en otro la fertilización con nitrógeno (N, fósforo (P y potasio (K, y en el último la fertilización con P y K. Durante el seguimiento se determinaron mineralización y medición de hidrocarburos, y se realizaron recuentos bacterianos y determinación de nitrato, nitrito y amonio. Los resultados indican que es posible la biodegradación de hidrocarburos en el suelo deficiente de nitrógeno de la Patagonia estudiado en tiempos mas prolongados que en aquellos que se realiza una fertilización con nitrógeno. El nitrógeno necesario para el proceso sería obtenido por los microorganismos del suelo por fijación biológica.

  20. Welcoming Address (by E. Curia) [IRPA12: 12. Congress of the International Radiation Protection Association: Strengthening Radiation Protection Worldwide - Highlights, Global Perspective and Future Trends, Buenos Aires, Argentina, 19-24 October 2008

    International Nuclear Information System (INIS)

    Full text: Distinguished participants of the 12th Congress of the International Radiation Protection Association, IRPA. On behalf of the Government of Argentina, it is an honour and a pleasure for me to welcome you most warmly to our country, in my capacity as Governor to the International Atomic Energy Agency and also in my current role as the 2008-2009 President of ARCAL, the Co-operation Agreement for the Promotion of Nuclear Science and Technology in Latin America and the Caribbean. I would just like to mention that Argentina's bid to host this important Congress was declared to be in the national interest by the president of Argentina in 2004. From the moment it was decided that Buenos Aires would host this important 12th IRPA Congress, the Government of Argentina, aware of its importance, supported its organization and publicity in all countries and in the international organizations involved in the field of radiation protection. We also maintained ongoing contacts with a large number of diplomatic missions accredited to Argentina to promote extensive international participation in the Congress. As a result of these efforts, the Congress has received the co-sponsorship and support of the International Atomic Energy Agency (IAEA), the World Health Organization (WHO) and the Pan American Health Organization (PAHO). These international organizations are also organizing a great many scientific satellite events in connection with IRPA12, which are taking place at various locations around the city of Buenos Aires. In witness of these efforts and their successful results, it is no surprise that this Congress has attracted over 1500 papers, and we are confident that once everyone has checked in, we will have over 1300 experts and officials here from more than 80 countries. This has made IRPA12, without a doubt, one of the largest international events in this field. Esteemed participants, in the four years that have passed since the 11th Congress in Madrid, there have

  1. STR data for PowerPlex 16 System from Neuquen population, SW Argentina.

    Science.gov (United States)

    Toscanini, Ulises; Berardi, Gabriela; Raimondi, Eduardo

    2003-07-01

    Allele frequencies for the 15 autosomic STR loci included in the PowerPlex 16 System kit (Promega) were estimated from a sample of 111 unrelated individuals living in Neuquen province, southwest of Argentina. Population showed to be in HWE.

  2. [Latin American malacology. Freshwater mollusks from Argentina].

    Science.gov (United States)

    Rumi, Alejandra; Gregoric, Diego E Gutiérrez; Núñez, Verónica; Darrigran, Gustavo A

    2008-03-01

    A report and an updated list with comments on the species of freshwater molluscs of Argentina which covers an area of 2 777 815 km2 is presented. Distributions of Gastropoda and Bivalvia families, endemic, exotic, invasive as well as entities of sanitary importance are also studied and recommendations on their conservation are provided. Molluscs related to the Del Plata Basin have been thoroughly studied in comparison to others areas of the country. This fauna exhibits relatively the biggest specific richness and keeps its affinity with the fauna of other regions of the basin in areas of Paraguay and Brasil. The 4 500 records of molluscs considered in this paper arise from the study of the collections of Museo Argentino de Ciencias Naturales "Bernardino Rivadavia", Buenos Aires; Museo de La Plata, La Plata and Fundación "Miguel Lillo", Tucumán. These institutions keep very important collections of molluscs in southern South America. Field information has recently been obtained and localities cited by other authors are also included in the data base. Until today, 166 species have been described, 101 belonging to 10 families of Gastropoda and 65 to 7 of Bivalvia. Families with highest specific richness are Lithoglyphidae (22) and Sphaeriidae (25), respectively. The number of endemic species (those present only in Argentina) by family is: Gastropoda: Ampullariidae (1), Cochliopidae (10), Lithoglyphidae (11), Thiariidae (3), Chilinidae (11), Lymnaeidae (2) and Physidae (2?); Bivalvia: Hyriidae (1?); Etheriidae (1?) and Sphaeriidae (10). Families with a distribution that comprise almost the whole country are: the Sphaeriidae and the gastropods Cochliopidae, Chilinidae and Lymnaeidae. Families Erodonidae and Solecurtidae (Bivalvia) were registered in mixohaline environments from Buenos Aires province. Gastropod families Thiaridae and Glacidorbiidae show a very restricted distribution. The rest of the families are present mainly in the center and north of the country

  3. Estudios etnoarqueológicos con cazadores de coipo de Argentina

    Directory of Open Access Journals (Sweden)

    Paula Daniela Escosteguy

    2014-12-01

    Full Text Available The analysis of diverse archaeofaunal assemblages from the Salado River Depression and the Northeastern part of Buenos Aires province (Buenos Aires pampa, Argentina led to propose that there had been intensive and integral exploitation of the coypu (Myocastor coypus by hunter– gatherer–fisher groups during the late Holocene era. An ethnoarchaeological study was therefore proposed to obtain data that could be extrapolated for the interpretation of the material record. It also offered information about some intangible aspects -actions unobservable in the archaeological record- such as social relations, specific vocabulary, and the influence of gender in different stages of the activity. Information was also obtained regarding technology and lanscape, among other topics, by participating in a coypu hunt and conducting interviews of the hunters.

  4. Lanteri, Sol, Un vecindario federal. La construcción del orden rosista en la frontera sur de Buenos Aires (Azul y Tapalqué, Centro de Estudios Históricos “Prof. Carlos S. A. Segreti”-CONICET, Córdoba, Argentina, 2011, 351 pp.

    Directory of Open Access Journals (Sweden)

    Juan Luis Martirén

    2014-12-01

    Full Text Available Lanteri, Sol, Un vecindario federal. La construcción del orden rosista en la frontera sur de Buenos Aires (Azul y Tapalqué, Centro de Estudios Históricos “Prof. Carlos S. A. Segreti”-CONICET, Córdoba, Argentina, 2011, 351 pp.

  5. The type-material of Arctiinae (Lepidoptera, Erebidae) described by Burmeister and Berg in the collection of the Museo Argentino de Ciencias Naturales Bernardino Rivadavia (Buenos Aires, Argentina)

    Science.gov (United States)

    Beccacece, Hernán M.; Vincent, Benoit; Navarro, Fernando R.

    2014-01-01

    Abstract Carlos G. Burmeister and Carlos Berg were among the most important and influential naturalists and zoologists in Argentina and South America and described 241 species and 34 genera of Lepidoptera. The Museo Argentino de Ciencias Naturales Bernardino Rivadavia (MACN) housed some of the Lepidoptera type specimens of these authors. In this study we present a catalogue with complete information and photographs of 11 Burmeister type specimens and 10 Berg type specimens of Phaegopterina, Arctiina and Pericopina (Lepidoptera, Erebidae, Arctiinae, Arctiini) housed in the MACN. Lectotypes or holotypes were designated where primary type specimens could be recognized; in some cases we were not able to recognize types. The catalogue also proposes nomenclatural changes and new synonymies: Opharus picturata (Burmeister, 1878), comb. n.; Opharus brunnea Gaede, 1923: 7, syn. n.; Hypocrisias jonesi (Schaus, 1894), syn. n.; Leucanopsis infucata (Berg, 1882), stat. rev.; Paracles argentina (Berg, 1877), sp. rev.; Paracles uruguayensis (Berg, 1886), sp. rev. PMID:25061380

  6. The type-material of Arctiinae (Lepidoptera, Erebidae) described by Burmeister and Berg in the collection of the Museo Argentino de Ciencias Naturales Bernardino Rivadavia (Buenos Aires, Argentina).

    Science.gov (United States)

    Beccacece, Hernán M; Vincent, Benoit; Navarro, Fernando R

    2014-01-01

    Carlos G. Burmeister and Carlos Berg were among the most important and influential naturalists and zoologists in Argentina and South America and described 241 species and 34 genera of Lepidoptera. The Museo Argentino de Ciencias Naturales Bernardino Rivadavia (MACN) housed some of the Lepidoptera type specimens of these authors. In this study we present a catalogue with complete information and photographs of 11 Burmeister type specimens and 10 Berg type specimens of Phaegopterina, Arctiina and Pericopina (Lepidoptera, Erebidae, Arctiinae, Arctiini) housed in the MACN. Lectotypes or holotypes were designated where primary type specimens could be recognized; in some cases we were not able to recognize types. The catalogue also proposes nomenclatural changes and new synonymies: Opharus picturata (Burmeister, 1878), comb. n.; Opharus brunnea Gaede, 1923: 7, syn. n.; Hypocrisias jonesi (Schaus, 1894), syn. n.; Leucanopsis infucata (Berg, 1882), stat. rev.; Paracles argentina (Berg, 1877), sp. rev.; Paracles uruguayensis (Berg, 1886), sp. rev.

  7. Costa y ribera en Claromecó, provincia de Buenos Aires Shoreline and coastline of Claromecó, Buenos Aires province

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    Roberto R. Kokot

    2011-03-01

    Full Text Available Se determinó la posición de la línea de costa en la localidad de Claromecó, provincia de Buenos Aires y se presentan elementos de carácter determinativo respecto a la ubicación de la línea de ribera. Al comparar los métodos de determinación de línea de costa y de ribera, surge que la primera resulta de la interpretación geomorfológica, mientras que la posición de la línea de ribera queda sujeta a un sinnúmero de indeterminaciones si no se realizan mediciones de largo plazo. La nomenclatura correspondiente a las áreas costeras no siempre es clara, dificultando la interpretación de los procesos ocurrentes en costa y ribera. La correcta delimitación tiene importancia técnica, científica y jurídica. La legislación actual indica que el límite entre derecho público y privado se corresponde con la línea de ribera. Se consideró el uso de especies vegetales en la determinación de la línea de costa y la línea de ribera, pero por sí mismas no son determinativas si no van acompañadas del reconocimiento geomorfológico del área. La correcta determinación de costa y ribera es indispensable en la ejecución de relevamientos geológicos y de especial importancia para la correcta planificación y desarrollo del área costera. En las tareas de delimitación del área costera se hallaron cordones litorales, el ubicado a unos S m s.n.m. tiene una edad de 4.370 años AP.The coastline position in Claromecó, Buenos Aires province was determined, featuring character elements identified in relation to the position of the shoreline. In comparison on the determination of coastline and shoreline, it appears that the first results of the geomorphologic interpretation, while the position of the shoreline is subject to a number of uncertainties if there are no long-term measurements. The nomenclature for the coastal areas is not always clear, hampering the interpretation of the processes occurring in the coast and shore. The correct

  8. Estudios sobre lecheron en la zona centro de la provincia de Buenos Aires Study of Euphorbia dentata in province center zone of Buenos Aires

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    V.F. Juan

    1996-01-01

    Full Text Available Euphorbia dentata Michaux é uma espécie de ciclo primaveril-estival, de recente introdução na zona central da Província de Buenos Aires. Nos últimos anos, no distrito de Azul, adiquiriu importância como planta daninha ocupando uma grande área agrícola, principalmente de soja, milho e girassol. Atualmente, o pouco conhecimento desta espécie dificulta o emprego de métodos de manejo racionais e eficientes. O objetivo deste trabalho foi determinar a área de difusão desta planta daninha na região de azul; descrever suas características botânicas e estudar o seu comportamento nesta área através de diversos aspectos biológicos que pudessem ser relevantes para estabelecer programas de controle. Os estudos foram desenvolvidos em toda área agricultável da região durante os anos de 1993/94, 1994/95 e 1995/96. Nas áreas de amostragem determinou-se a presença e densidade e, diversos aspectos relacionados a biologia como emergência, germinação, número de frutos e sementes por planta e peso seco. Determinou-se a viabilidade das sementes e descreveu-se botanicamente a espécie. Verificou-se que a espécie ocupa uma superfície aproximada de 250.000 ha, o que representa 40% do distrito de Azul e 85% da área cultivada, com níveis de infestação que vão desde 20 a 200 plantas/m2. Sob condições naturais ocorrem dois picos de emergência e, a floração foi induzida pelo fotoperíodo. Em geral as plantas produzem uma grande quantidade de sementes e com alta viabilidade. Para um melhor conhecimento da espécie, esta encontra-se descrita botanicamente.Euphorbia dentata Michaux is an annual species which grows during spring and summer. Its has been recently introduced in the Province of Buenos Aires. In Azul district, during the last few years it has become an important weed with increasing propagation occuping a high proportio of agricultural land associated mainly with soybean, corn and sunflower crops. At present the limited

  9. Analysis of regulatory uses and its connection with flood prone areas. The case of 23 counties on the coastline of the province of Buenos Aires

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    María Inés Botana

    2008-01-01

    Full Text Available This paper is based on an analysis of the land and soil use regulations in the 23 counties of the basin of the rivers Paraná and de la Plata, which make up the area of study of the project in which this is framed1, bearing in mind the specific treatment of the affected areas as well as flood prevention. In order to do this, we have taken into account the following: a the analysis of the evolution of State regulations as regards soil occupancy in the greater Buenos Aires; b the updated registry of regulations connected with land demarcation and use of soil validated by the Executive Power (Regulation N§ and Validating Decree N§; c the specific regulation (Regulation N§ / Executive Power decree N§ by municipality / by content. The data to perform the study of regulatory soil use was obtained from the new Interactive Land Demarcation Map of the Province of Buenos Aires created by the Ministry of Government of the Province of Buenos Aires, Subsecretariat of Municipal Affairs. The analysis of current regulations in each of the 23 counties comprised in the study will allow us to define future intervention strategies, which will act as instruments in connection with land regulation for each municipality's management.

  10. Aedes aegypti resistance to temephos in Argentina

    OpenAIRE

    Seccacini, Emilia; Lucía Mulas, Alejandro; Eduardo N Zerba; Licastro, Susana; Masuh, Hector M.

    2008-01-01

    Monitoring of resistance of Aedes aegypti to temephos was implemented in the provinces of Formosa and Misiones, Argentina, as a response to the need to improve the vigilance for the dengue vector in areas of high risk of dengue. Eggs collected in each locality were reared, and susceptibility to temephos was assayed using larval bioassays. A weak decrease in susceptibility of larvae to temephos was observed in Clorinda and Puerto Iguazú, indicating an incipient resistance with a resistance rat...

  11. Stronger Municipalities for Stronger Cities in Argentina

    OpenAIRE

    Rémy Prud'homme; Hervé Huntzinger; Pierre Kopp

    2004-01-01

    In recent years a number of studies have been devoted to the twin issues of economic development and of decentralization in Argentina. Many papers have tried to understand the complex system of intergovernmental relations. Most of them, however, have focussed on the role of provinces, and neglected the problems raised by municipalities. This paper tries to bridge this gap, and to suggest that stronger municipalities could contribute to produce stronger cities that would in turn foster economi...

  12. Revisión sistemática del género Halictillus (Hymenoptera: Halictidae: Augochlorini en la Argentina Systematic revision of the genus Halictillus (Hymenoptera: Halictidae: Augochlorini in Argentina

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    Rocío A. González-Vaquero

    2010-06-01

    Full Text Available Entre los grupos basales de la tribu Augochlorini, se encuentra el género de abejas Halictillus Moure, con sólo dos especies descriptas y ninguna revisión sistemática hasta el momento. En este trabajo, se describen cuatro especies nuevas de Halictillus de la Argentina y Chile. Las especies nuevas son: H. amplilobus sp. nov. (de Buenos Aires, Córdoba y Río Negro, H. peninsularis sp. nov. (de la Península de Valdés, Chubut, H. badiclypeus sp. nov. (de Mendoza, La Rioja y Catamarca y H. reticulatus sp. nov. (de las zonas occidentales de Chubut, Neuquén y Río Negro en la Argentina, y las regiones de La Araucanía y Los Lagos en Chile. Se presenta una clave para la determinación de las seis especies que componen el género, así como descripciones detalladas, imágenes de microscopio electrónico de barrido y un mapa de distribución geográfica de las especies nuevas.Among the basal genera of the tribe Augochlorini is the bee genus Halictillus Moure, which comprises only two described species and has no systematic revision at the moment. Four new species of Halictillus from Argentina and Chile are described in this contribution: H. amplilobus sp. nov. (from Buenos Aires, Córdoba and Río Negro Provinces, H. peninsularis sp. nov. (from Península Valdés, Chubut Province, H. badiclypeus sp. nov. (from Mendoza, La Rioja and Catamarca Provinces and H. reticulatus sp. nov. (from western Chubut, Neuquén and Río Negro Provinces in Argentina, and the regions of La Araucanía and Los Lagos in Chile. A key to the six species of the genus, as well as detailed descriptions, scanning electron microscope images and a map with distributional data of the new species are provided.

  13. Contracaecumovale (Nematoda: Anisakidae from Rollandia rolland Quoy & Gaimard 1824 (Aves, Podicipedidae in Argentina Contracaecumovale (Nematoda: Anisakidae de Rollandia rolland Quoy & Gaimard 1824 (Aves, Podicipedidae na Argentina

    Directory of Open Access Journals (Sweden)

    Noelia Adelina Galeano

    2012-06-01

    Full Text Available Necropsy on 15 specimens of white-tufted grebe, Rollandiarolland, caught in the Mar Chiquita and Chascomús lagoons (Buenos Aires province, revealed the presence of Contracaecumovale (Linstow, 1907. This nematode shows a marked specificity for podicipediform birds. The specimens were identified from morphological study on features such as cephalic and esophageal structures and caudal papillae, using both optical and scanning electron microscopy. This is the first record of C. ovale parasitizing R. rolland in Argentina.Necropsia de 15 espécimes de mergulhão-de-orelha-branca, Rollandiarolland, coletados nas lagoas Mar Chiquita e Chascomús (Província de Buenos Aires, revelou a presença de Contracaecumovale (Linstow, 1907. Esse nematóide tem uma marcada especificidade pelas aves podicipediformes. Os espécimes foram identificados a partir de características, tais como estruturas morfológicas cefálicas e esofágicas e papilas caudais, utilizando-se microscopia óptica e microscopia eletrônica de varredura (MEV. Esse é o primeiro registro de C. ovale parasito de R. rolland na Argentina.

  14. The genera Boiruna and Clelia (serpentes: pseudoboini in Paraguay and Argentina

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    Norman J. Scott Jr.

    2006-01-01

    Full Text Available Snakes of the pseudoboine genera Clelia, which is probably polyphyletic, and Boiruna are distributed from southern Argentina, southern Brazil, and Uruguay northwards into central México. Six members occur in Paraguay and Argentina: B. maculata, Clelia bicolor, C. clelia, C. plumbea, C. quimi, and C. rustica. Historically, there has been taxonomic confusion among the larger species (B. maculata, C. clelia, C. plumbea, and C. rustica and between the small species (C. bicolor and C. quimi. All of the species except C. rustica have distinct ontogenetic color changes. Species can be distinguished on the bases of size, color, hemipenial spines, and loreal, supralabial, and ventral scale counts. Much of the morphological evolutionary differentiation in Boiruna and Clelia seems to have taken place in the snout region, as evidenced by the differing proportions of the scales of the loreal region. Boiruna maculata has the widest ecological amplitude. It is broadly distributed in most vegetation types north of the 38th parallel in central Argentina, being absent only from the deltaic sediments of Buenos Aires Province, Argentina and the broad valleys and rolling hills of eastern Paraguay. Clelia bicolor is most common in the Paraguay and Paraná river valleys, with a few records from the Andean foothills in northern Argentina. Clelia clelia is distributed along the Río Paraguay and the lower Paraná, and is also found throughout much of eastern Paraguay. Clelia plumbea is apparently parapatric with C. clelia along the Río Paraná in southeastern Paraguay and Misiones Province, Argentina. The ranges of C. quimi to the east and C. bicolor in the west about in this same region without apparent overlap. There are no vouchered records of Clelia rustica from Paraguay. In Argentina, it is a species of temperate climates; north of the 30th parallel, it occurs in the Andean foothills and the wet forests of Misiones Province. Southwards, it is widely distributed

  15. Persistence of the biocide activity of atrazine in soils of the southeast of Buenos Aires Province Persistência do herbicida atrazine em solos do sudeste da Provincia de Buenos Aires

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    A.A. Delmonte

    1996-01-01

    Full Text Available Atrazine persistence in soils of the southeast of Buenos Aires Province, was studied by an oat bioassay. Atrazine doses of 0.58, 1.16, and 2.32 mg.g-1 dry soil weight (DSW were applied to pots containing soils from Balcaree, A. Gonzáles Chaves and San Cayetano sites, whose organic matter (OM content of soils were 5.70, 5.15, and 3,84%, respectively. Avena sativa cv. Millauquén plants were grownth in the pots under greenhouse conditions at different times after atrazine application. Shoots were evenly cut above the soil and dry weight determined as a measure of plant growth. Plants grown in non-sprayed soil were used as controls. Relative dry weight (RDW of shoots was calculated as percentage of control. Atrazine phytotoxicity was expressed in terms of 50 % plant growth reduction (GR50 in the soils under study. Herbicide persistence was expressed in terms of days after treatment (DAT needed for the plant to achieve 80% of RDW. Atrazine GR50 values of 0.30, 0.64, and 0.90 mg.g-1 DSW in soils from San Cayetano, Balcare and A.G. Chaves, were respectively obtained at 42 DAT. Herbicide persistences at the recommended dose (1.16 mg.g-1 were 100, 143, and 221 DAT for A.G. Chaves, Balcarce and San Cayetano soils, respectively. San Cayetano soil had both the lowest OM content and cation exchange capacity (CEC, as well as the highest pH, of all the soil studied here. These results were consistent with both the lowest GR50 and the highest persistence abtained for atrazine in this soil.O objetivo do presente trabalho foi estudar a persistência da atrazine em solos do sudoeste da Província de Buenos Aires, Argentina, por meio de bioensaio com aveia. Estudaram-se doses de atrazine de 0; 0,58; 1,16 e 2,32 mg.g-1 de solo seco (SS, os quais foram aplicados em vasos que continham solos de Balcarce, A. Gonzáles Chaves e San Cayetano. O conteúdo de matéria orgânica (MO dos solos foram 5,70; 5,15 e 3,84% para Balcarce, A. Gonzáles Chaves e San Cayetano

  16. From 1962 the teaching of Methodology of Radioisotopes is continuous in the University of Buenos Aires of the Argentine Republic; Desde 1962 la ensenanza de Metodologia de Radioisotopos es continua en la Universidad de Buenos Aires de la Republica Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Rivera, E.; Cremaschi, G.; Martin, G.; Zubillaga, M.; Cricco, G.; Davio, C.; Genaro, A.; Bianchin, A.; Mohamad, N.; Klecha, A.; Calmanovici, G.; Goldman, G.; Salgueiro, J.; Nunez, M.; Medina, V.; Gutierrez, A.; Leonardi, N.; Bergoc, R. [Laboratorio de Radioisotopos, Facultad de Farmacia y Bioquimica, Universidad de Buenos Aires, Junin 956, 1113- Buenos Aires (Argentina)]. e-mail: rmbergoc@arnet.com.ar

    2006-07-01

    In the Faculty of Pharmacy and Biochemistry of the University of Buenos Aires the teaching of the radioisotopes began in 1960 and uninterruptedly continuous. The application of the radioisotopes and the radiations in different professional activities it is acceptable only in a context of radiological safety and with personal appropriately trained. Conscious of it, the training in grade, postgraduate and technicature, has more of 40% of the thematic one guided to the formation in radiological protection. The courses dictated at the moment in the Laboratory of Radioisotopes they include: Grade formation: to) Subject grade 'Methodology of Radioisotopes' in the Career of Biochemistry: it began to be dictated in 1960 and until the present, more of 6500 students they have gone by our classrooms. b) Grade subject 'Radiopharmacy' in the Career of Pharmacy: guided to the formation of a modern pharmacist, with necessary knowledge to be developed as professional in the Radiopharmaceutical area. Postgraduate formation: c) Postgraduate course of Methodology of Radioisotopes specially directed to biochemical, biologists, veterinarians, chemical. It is dictated uninterruptedly from 1962. d) Postgraduate course in Methodology of Radioisotopes for medical professionals, specially directed to professionals of the medicine that want to specialize in different branches of the Nuclear Medicine. Both courses have 220 present hours and it stops their approval the assistants they should surrender a final exam at open book that consists on the resolution of a practical exercise adapted to their professional practices. Until the present they have surrendered their exams satisfactorily approximately 2000 professionals coming from different areas of the Argentina and of several countries of Hispanic speech. e) Starting from 1992 the Course of Upgrade in Methodology of Radioisotopes directed to professionals that want to upgrade its knowledge in new radioisotopic

  17. Detección de Malpighamoeba mellifcae (Protista: Amoebozoa en Apis mellifera (Hymenoptera: Apidaede Argentina Detection of Malpighamoeba mellifcae (Protista: Amoebozoa in Apis mellifera (Hymenoptera: Apidae of Argentina

    Directory of Open Access Journals (Sweden)

    Santiago Plischuk

    2010-12-01

    Full Text Available Debido a su rol como polinizador y productor de miel, la abeja Apis mellifera L. es considerado un insecto beneficioso. Si bien Argentina juega un papel de liderazgo en la producción de miel, existe un considerable vacío en el conocimiento acerca de las enfermedades de etiología protista que afectan las abejas en el país. La ameba Malpighamoeba mellificae Prell es un protista entomopatógeno que invade los túbulos de Malpighi de las abejas e interfiere con el proceso de excreción, debilitando al huésped y posiblemente facilitando la acción de otros patógenos. En esta contribución se presentan los primeros hallazgos de M. mellificae en Argentina y se brindan datos iniciales acerca de su frecuencia, intensidad de las infecciones, y co-ocurrencia con Nosema sp. Malpighamoeba mellificae se halló en dos de 36 localidades prospectadas: San Cayetano, al Sur de la provincia de Buenos Aires y San Carlos de Bariloche, en el Oeste de la provincia de Río Negro.Due to its role as a pollinator and honey producer, the honey bee Apis mellifera L. is considered a beneficial insect. Although Argentina plays a leading role in honey production, there is a considerable gap in knowledge regarding protistan diseases that affect honey bees in the country. The amoeba Malpighamoeba mellificae Prell is an entomopathogenic protist that invades the Malpighian tubules of honey bees and interferes with the excretory process, debilitating the host and possibly facilitating the action of other pathogens. In this contribution, we present the first reports of M. mellificae in Argentina, and provide some initial data about its frecuency, infection intensity, and co-occurrence with Nosema sp. Malpighamoeba mellificae was found in two out of 36 localities surveyed: San Cayetano, in southern Buenos Aires province, and San Carlos de Bariloche, in western Río Negro province.

  18. Análisis de cambios de uso del suelo en la Delegación Municipal de Ingeniero White (Buenos Aires, Argentina: aplicación de geotecnologías

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    Andrea Marcela Silva Schweitzer

    2014-01-01

    Full Text Available La Delegación Municipal de Ingeniero White se encuentra en la provincia de Buenos Aires, Argentina. Este trabajo analiza la dinámica de cambio de uso del suelo en el área mencionada durante el periodo 1967-2012. La metodología empleada se basa, por un lado, en el desarrollo del proceso cartográfico necesario para la identificación de los usos del suelo a escala 1:50.000 para ambos años y, por otro, en la aplicación del método de tabulación cruzada en un entorno SIG con el fin de evaluar los cambios ocurridos en el lapso de 45 años. Los resultados muestran un importante crecimiento del uso residencial y poca variación en el resto de los usos.

  19. Cooperation on Water management issues, Argentina : Project in the framework of Bilateral Cooperation between Argentina and the Netherlands : Case studies on water management issues in Argentina

    NARCIS (Netherlands)

    Querner, E.P.; Morabito, J.A.; Rebori, G.

    2007-01-01

    In Argentina parts of the country have problems encountered from too much water or suffer serious water shortages. The Humid Pampas encounter an increased rainfall since the 1970’s. In Mendoza Province water resources are limited and all the water from the rivers is used for agriculture, drinking wa

  20. Science and education between Spain and Argentina, 1910-1940. The university chairs of Buenos Aires «Institución Cultural Española» Las cátedras de la «institución cultural española» de buenos aires. Ciencia y educación entre España y Argentina, 1910-1940

    Directory of Open Access Journals (Sweden)

    Rosario E. FERNÁNDEZ TERÁN

    2011-07-01

    Full Text Available During the first decades of the twentieth century Spain experienced its most significant period of educational, cultural and scientific encounter with Europe in all its history. The new approaches and reforms, initially advanced by García Alix in 1900 and accomplished by the Junta para Ampliación de Estudios from 1907, became the model for many Latin-American countries. In particular, the celebration in 1910 of the centenary of the declaration of independence in Argentina became the origin for a very special initiative that rejoined Spanish immigrants and their descendants with the country of their ancestors, which by that time had learned how to overcome several decades of decline looking for Europe: the Institución Cultural Española at Buenos Aires. The ICE, through the JAE, established and supported two successive university chairs. In Buenos Aires, since 1914, the most important Spanish University Professors sat at the «Cátedra de Cultura Española» alternating Humanities and the Sciences. In Madrid, from 1928, some European authorities joined Spanish scientists at the «Cátedra Cajal de Investigaciones Científicas». These initiatives, which showed the splendour of what is being known as Spanish Silver Age, suffered a dramatic rupture with the outbreak of the Civil War. After 1939, a new Institución Cultural Española had to adapt itself to the new Spain, a very different country from the one they had met during the fist third of the twentieth century, while the Junta para Ampliación de Estudios was reincarnated as Consejo Superior de Investigaciones Científicas.Durante las primeras décadas del siglo XX España vivió la etapa de convergencia educativa, cultural y científica con Europa más singular de toda su historia, a través de novedades y reformas que, esbozadas en la normativa ministerial por García Alix en 1900, y culminadas con apuestas como la de la Junta para Ampliación de Estudios a partir de 1907, se

  1. El patrimonio industrial-minero como recurso turístico cultural: El caso de un pueblo-fábrica en Argentina

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    Fernández, Guillermina

    2004-01-01

    Full Text Available The valuation of the heritage on the part of the society is fundamental, because it allows to understand of where we come and towards where we go. Within the cultural heritage, a category exists that is the industrial heritage. The present I articulate must like objective diagnose the possibilities of developing to a program of cultural tourism from the existing industrial heritage in the locality of Villa Cacique - Barker, in the Southeast of the Province of Buenos Aires (Argentina, this would allow to maintain the identity of the locality and through a tourist model cultural-industrialist to increase economic the income local

  2. Intraseasonal characterization of tropospheric O3 in the North of the Buenos Aires Province: determining four months cycle and teleconnection evidence

    CERN Document Server

    Cionco, Rodolfo G; Quaranta, Nancy; Agosta, Eduardo

    2013-01-01

    Tropospheric ozone (O3T) is a secondary pollutant whose formation involved primarily solar radiation, NOx and volatile organic compounds. The North of the Buenos Aires Province has great agricultural-industrial activity; therefore, O3T study is an important issue in the area. In this paper, we present the first results tend to estimate and characterize O3T in San Nicol\\'as de los Arroyos, North of Buenos Aires. Due to a lack of in situ data, we analyse the observations of the instrument OMI (Ozone Monitoring Instrument) of land remote sensing satellite AURA (GSFC/NASA). The data cover the years 2004-2013. Applying the multitaper technique (MTM), very suitable for short and noisy data series, spectral analysis is performed on a grid corresponding 1{\\deg} in latitude by 1.5{\\deg} in longitude, centred South of the Province of Santa Fe. The most remarkable result is the emergence of a significant peak (95%) of four months cycle. To test the validity of this signal in San Nicol\\'as, daily solar radiation data (Q)...

  3. Los recursos hídricos subterráneos en el desarrollo socioeconómico de la provincia de Buenos Aires, Argentina

    OpenAIRE

    González, Nilda; Álvarez, María del Pilar; Trovatto, María Marta; Solero, Claudia

    2008-01-01

    Se analiza la alta gravitación que históricamente ha tenido el aprovechamiento de los recursos hídricos subterráneos en el desarrollo socioeconómico de la provincia con mayor producto interno de Argentina, desde el punto de vista de su aplicación para satisfacer los requerimientos de las actividades usuarias domésticas, industriales, y agropecuarias, las más importantes volumétricamente. En un territorio de 307571 km2 con un clima que va desde sub-húmedo - húmedo en el Noreste (precipitación ...

  4. La regulación económica en las concesiones de agua potable y desagües cloacales en Buenos Aires y Corrientes, Argentina

    OpenAIRE

    Daniel Artana; Fernando Navajas; Santiago Urbiztondo

    1997-01-01

    En Argentina, como en la mayoría de los países del mundo, el sector sanitario ha sido tradicionalmente manejado por empresas públicas. Sin embargo, la corriente privatizadora de los últimos 10 años ha alcanzado a este sector lo cual la obliga a compatibilizar las ventajas de la provisión privada y las demandas sociales que caracterizan a los servicios públicos. La literatura especializada identifica como factores determinantes de la obtención de dichas ventajas, al diseño de la estructura y n...

  5. Homicidios diarios. Análisis del discurso periodístico sobre homicidios por armas de fuego. Buenos Aires (Argentina) 2001-2002

    OpenAIRE

    Leonardo Federico; Romeu Gomez; Paola Piacenza

    2010-01-01

    Durante los años 2001 y 2002, la Argentina atravesó una grave crisis política y social, alcanzando niveles de pobreza y exclusión inauditos. En esos años, los diferentes tipos de violencia urbana mostraron un marcado incremento, en especial los homicidios cometidos mediante el uso de armas de fuego, constituyéndose en una problemática social con importantes repercusiones para la salud pública. El presente artículo es producto de una investigación cualitativa que indagó, mediante un análisis c...

  6. El Paleozoico inferior de la sierra del Campo, provincia de Tucumán: Nuevos datos sobre la prolongación austral de la cuenca eopaleozoica del noroeste argentino The lower Paleozoic in the Sierra del Campo, province of Tucumán: New data on the southern extension of the Eopaleozoic basin in northwestern Argentina

    Directory of Open Access Journals (Sweden)

    MG Mángano

    2003-12-01

    Full Text Available El estudio de afloramientos del Paleozoico inferior de la sierra del Campo, provincia de Tucumán, proporciona información sobre el borde sur de la cuenca eopaleozoica del noroeste argentino. El análisis de facies indica que estos depósitos registran sedimentación en un complejo de barras arenosas submareales en un ambiente marino dominado por mareas. Una comparación con otros afloramientos de la cuenca sugiere una correlación regional con el Grupo Mesón.Study of Lower Paleozoic outcrops from the Sierra del Campo, Tucumán province, provides information on the southern margin of the Early Paleozoic basin of northwest Argentina. Facies analysis indicates that these deposits record sedimentation in a subtidal sandbar complex of a tide-dominated shallow sea. Comparison with other outcrops in the basin suggests a regional correlation with the Mesón Group.

  7. Association between dietary habits, education, serum triglycerides and blood cholesterol among women of Cabildo, Buenos Aires Asociación entre hábitos nutricionales, educación, triglicéridos séricos y colesterol total en mujeres de Cabildo, Buenos Aires

    OpenAIRE

    Raúl J. Schneider; Noel Barengo; Irja Haapala; Marcelo Tavella

    2006-01-01

    A cross sectional study of 107 women between 20 and 69 years old, living in the town of Cabildo, province of Buenos Aires, Argentina, which describes food intake and analyses its relation to their education, blood cholesterol and serum triglyceride levels. A food frequency questionnaire including questions regarding meal patterns and food use were completed by the participants. Questions regarding educational status were included. A nutritional risk score was created from nine food groups. To...

  8. Egg parasitoid of Saccharosydne subandina (Hemiptera: Delphacidae) in Neuquen, Argentina

    Science.gov (United States)

    Saccharosydne subandina Remes Lenicov & Rossi Batiz is a recently described planthopper from Argentina which is known to feed on garlic, rye, and pampas grass (de Remes-Lenicov & Rossi-Batiz 2010). During a trip to Neuquén Province in February 2007, we noticed a heavy infestation of pampas grass, Co...

  9. The bloodsucking biting midges of Argentina (Diptera: Ceratopogonidae

    Directory of Open Access Journals (Sweden)

    Gustavo R Spinelli

    2005-04-01

    Full Text Available A key is presented for the identification of the adults of 54 species of bloodsucking ceratopogonids, 51 of which are known inhabitants of Argentina, and Culicoides uruguayensis Ronderos, C. pifanoi Ortiz, and C. trilineatus Fox, which are known to occur in bordering Uruguay and Paraguay. Wing photographs are provided of females of the 45 species of Culicoides. Three new species of Culicoides Latreille from Northeastern Argentina are described and illustrated: C. austroparaensis Spinelli, C. bachmanni Spinelli, and C. williamsi Spinelli. The following six species are recorded for the first time from Argentina and/or bordering localities in Paraguay: Leptoconops brasiliensis (Lutz, C. gabaldoni Ortiz, C. ginesi Ortiz, C. pifanoi Ortiz, C. pseudocrescentis Tavares and Luna Dias, and C. trilineatus; and C. estevezae Ronderos and Spinelli is newly recorded from Misiones province of Argentina. C. lopesi Barretto is excluded from the Argentinean ceratopogonid fauna.

  10. FLORA ARGENTINA: NOVEDADES EN PRIMULACEAE Argentinian flora: novelties in Primulaceae

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    Sara G. Tressens

    2010-08-01

    Full Text Available

    Anagallis filiformis Cham. & Schltdl., especie no mencionada previamente para la Argentina,
    es citada, descripta e ilustrada. Se señala por primera vez A. arvensis L., ampliamente
    extendida en la Argentina, para las provincias de Corrientes y Misiones. Se incluye una clave
    para la identificación de las cuatro especies de Anagallis presentes en el país
    Anagallis filiformis Cham. & Schltdl., species not previously mentioned for Argentina is
    recorded, described and illustrated. A. arvensis L., largely widespread in Argentina, is reported
    for the first time from Corrientes and Misiones provinces. A key for the identification of the four
    species of Anagallis present in the country is also included

  11. Multidisciplinary response for a radiological accident developed in Argentina

    International Nuclear Information System (INIS)

    In January 2009 during an oil well logging task in Rincon de los Sauces, Province of Neuquen, Argentina, and, as a result of the temporary loss of control of a 137Cs sealed source of 92,5 GBq (2,5 Ci), two workers were allegedly exposed to ionizing radiation. The Health Emergency Coordination System in Neuquen activated the Radiological Emergency Intervention System of the Nuclear Regulatory Authority (NRA). An initial assessment of the accident scenario and the involved persons was performed. Two workers were were transfer to Buenos Aires for a biodosimetry evaluation. In Buenos Aires, the Burn Hospital performed the first diagnostic and therapeutic approach of the radioinduced skin injuries. The NRA estimated the biological absorbed doses and the studies of telethermography. The Italian Hospital was in charge of the studies using ultrasonography and Eco- Doppler. As a result of the multidisciplinary evaluation performed, one of the workers was diagnosed with superficial radioinduced dermatitis. The mentioned intervention highlighted the importance of multidisciplinary and multiparametric work for the evaluation of a radiological accident, as well as for the diagnosis and early treatment of the exposed persons. (authors)

  12. Proyecto "Encuesta a los Servicios Alimentarios de Comedores Escolares Estatales" (PESCE: alcance de las metas nutricionales de las prestaciones alimentarias de los comedores escolares de Gran Buenos Aires, Argentina Proyect: "Survey of State School meal service" (PESCE: Scope of Food Supply Nutritional Goals in State School in Gran Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Susana Buamden

    2010-03-01

    Full Text Available Objetivo: Evaluar el alcance de las metas nutricionales de las prestaciones alimentarias de los comedores escolares estatales de la región Gran Buenos Aires, Argentina, en 2007. Materiales y Métodos: Unidad de análisis: prestación alimentaria de todas las escuelas estatales de la región. Metas nutricionales: elaboradas por prestación, para energía, nutrientes y alimentos críticos por grupo etario (Grupo 1: 3 años; Grupo 2: 4-8 años; Grupo 3: 9-14 años. Encuesta ad-hoc: administrada por nutricionistas. Muestreo: aleatorio estratificado bietápico; total 301 escuelas, 299 relevadas. Análisis de datos: sistema informático ad-hoc. Resultados: Desayuno/Merienda: el aporte de leche fue menor a la meta para todos los grupos etarios. La ración brindada al Grupo 1 alcanzó la meta para todos los nutrientes excepto el Calcio. Para el Grupo 2 la ración brindada solo fue aceptable en zinc y hierro. El Grupo 3 no alcanzó ninguna meta. Almuerzo: para todos los grupos etarios, existió un aporte calórico por debajo de la meta y exceso proteico. Para el Grupo 1, la ración ofrecida superó las metas de hierro y zinc; y no alcanzó la de Vitamina A. Para el Grupo 2, los aportes de zinc y vitamina C superaron la meta; calcio, hierro y vitamina A presentaron aportes bajos. Para el Grupo 3, solo se alcanzó la meta en vitamina C. El aporte de carne solo superó las metas establecidas para el grupo 1. El aporte de fruta superó la meta para el grupo 1 y 2, y fue aceptable para el grupo 3. El Desayuno/Merienda para Grupo 2 aportó más kcal en las escuelas que no brindaban almuerzo. Conclusiones: El Desayuno/Merienda solo alcanzó las metas nutricionales (excepto calcio en el grupo de 3 años. En Almuerzo, se observó aporte calórico por debajo de la meta y exceso proteico para todos los grupos etarios.Objective: To assess the scope of food supply nutritional goals in state school in the area of Gran Buenos Aires, Argentina, in 2007. Materials and

  13. GUARDIANES DEL PARAÍSO. GÉNESIS Y GENEALOGÍA DE UNA IDENTIDAD COLECTIVA EN MAR DE LAS PAMPAS, PROVINCIA DE BUENOS AIRES / Guardians of Paradise. Genesis and genealogy of a collective identity in Mar de las Pampas, Buenos Aires Province

    Directory of Open Access Journals (Sweden)

    Gabriel David Noel

    2011-12-01

    Full Text Available La localidad balnearia de Mar de las Pampas (Buenos Aires, Argentina ha experimentado en la última década un proceso inédito de expansión de su infraestructura edilicia y de servicios dirigidos al turismo. Al mismo tiempo, la inmensa mayoría de sus residentes permanentes perciben este crecimiento como una amenaza a su proyecto de construcción colectiva de una comunidad “virtuosa” argumentada en torno de valores como la “ecología”, lo “natural” y la “calidad de vida”. Nuestro texto busca mostrar algunas de las formas en que los residentes permanentes plantean y responden las preguntas acerca de qué es, qué debe ser y qué no Mar de las Pampas – así como los repertorios morales a los que los mismos recurren - en el marco de una narrativa moral que opone un proyecto “virtuoso” y “auténtico” de “comunidad” a los intereses “espurios” de una “especulación inmobiliaria” y un “progreso desenfrenado” que buscarían corromper el proyecto de estos “vecinos”, así como la manera en la cual estas disputas contribuyen a la consolidación de una identidad colectiva compartida para sus pobladores.   Palabras Clave: identidad colectiva; moralidades; construcción de comunidad; ecologismo; localidades turísticas.   Abstract Mar de las Pampas, a seaside resort on the Atlantic Seaboard of the province of Buenos Aires (Argentina has undergone in the last decade a process of massive expansion of its touristic infrastructure (especially on lodging and commercial facilities. At the same time, most of its full-time residents consider this process as a threat looming over their own project of collective construction of a virtuous community, grounded in values such as “ecology”, “natural life” and “quality of life”. Our text will attempt to show some of the ways in which the permanent residents of Mar de las Pampas pose and answer their questions about what Mar de las Pampas is, what should it be and

  14. Variación temporal de la riqueza, composición y densidad de acridios (Orthoptera: Acridoidea en diferentes comunidades vegetales del Sur de la provincia de Buenos Aires Temporal variation in grasshopper (Orthoptera: Acridoidea richness, composition, and density in grasslands of the southern Buenos Aires province

    Directory of Open Access Journals (Sweden)

    Yanina Mariottini

    2012-12-01

    Full Text Available Los acridios figuran entre los invertebrados herbívoros dominantes en la mayoría de los sistemas de pastizal. Si bien, en Argentina, la importancia económica de estos insectos ha sido reconocida desde el siglo XIX, aún se desconocen aspectos importantes de la biología y ecología de la mayoría de las especies. El objetivo principal de este estudio fue determinar cómo la riqueza de especies, la composición y la densidad de acridios variaron en las comunidades vegetales más características del Sur de la provincia de Buenos Aires, durante cinco temporadas sucesivas (2005-06 hasta 2009-10, un área históricamente afectada por estos insectos. Se colectó un total de 22especies. La riqueza de acridios fue similar entre las diferentes comunidades vegetales, observándose una disminución significativa de la misma durante la última temporada de muestreo. La densidad total de acridios aumentó significativamente en todas las comunidades vegetales durante el estudio, alcanzando niveles de explosión poblacional (“outbreak” en las últimas dos temporadas. En la de 2009-10, la densidad fue ocho veces mayor que en 2005-06. Las especies que más aportaron a este aumento en la densidad fueron Dichroplus maculipennis (Blanchard y Borellia bruneri (Rehn. Dichroplus maculipennis resurgió como el acridio plaga más perjudicial en la región Pampeana, con el desarrollo de un “outbreak” de magnitud histórica, se registraron, en algunos sitios, densidades de hasta 75 ind/m².Grasshoppers are among the dominant invertebrate herbivores in most grassland habitats. The economic importance of grasshoppers has been recognized in Argentina since the XIX century, but many aspects of the biology and ecology of most species remain unknown. The main objective of this study was to determine how grasshopper species richness, composition, and density varied among characteristic plant communities during five successive seasons (2005-06 to 2009-10 in grasslands

  15. Two new species of Nippostrongylinae (Nematoda: Trichostrongylina: Heligmonellidae from the grey leaf-eared mouse Graomys griseoflavus (Sigmodontinae in Argentina

    Directory of Open Access Journals (Sweden)

    Digiani M.C.

    2003-03-01

    Full Text Available Two new species of Nippostrongylinae, Hassalstrongylus puntanus n. sp., and Stilestrongylus franciscanus n. sp. are described from the intestine of the grey leaf-eared mouse Graomys griseoflavus (Waterhouse, 1837 (Sigmodontinae from the Province of San Luis, Argentina. Hassalstrongylus puntanus n. sp. is distinguished from the most closely related species H. dollfusi (Diaz-Ungria, 1963, a parasite of Mus musculus from Venezuela by longer rays 2, shorter rays 4, proximal half of the dorsal ray non-enlarged and a non-retractile female tail. Stilestrongylus franciscanus n. sp. is distinguished from the most closely related species S. flavescens Sutton & Durette-Desset, 1991, a parasite of Oryzomys flavescens from Argentina, by rays 2 and 3 diverging separately from common trunk of rays 2 to 6, and by right ray 3 arising from this trunk more distally than ray 6. Stilestrongylus azarai Durette-Desset & Sutton, 1985, a parasite of Akodon azarae from Buenos Aires, Argentina, was also found parasitizing G. griseoflavus, representing new host and locality records. Some additional morphological data for this species are also provided.

  16. [Pollen dispersion and reproductive success of four tree species of a xerophytic forest from Argentina].

    Science.gov (United States)

    Torretta, Juan Pablo; Basilio, Alicia M

    2009-01-01

    The "talares" in eastern Buenos Aires province, Argentina, are coastal xerophitic forests structured by few arboreal species surrounded by a lower and moister soil matrix. We studied the reproductive parameters of the most representative arboreal species (Celtis tala, Scutia buxifolia, Jodina rhombifolia, and Schinus longifolia). Pollen dispersion was studied through floral visitor traps (biotic dispersion) and using gravimetric pollen collectors (abiotic dispersion). The reproductive success (fruit formation rate) of the focal species was studied by enclosing flowers with different mesh bags. The reproductive system varied among the different species. C. tala was anemophilous and selfcompatible. S. buxifolia was entomophilous and floral visitors dependant. J. rhombifolia was entomophylous, although spontaneous autogamy could favor reproduction in the absence of pollinators. Lastly, S. longifolia could be an ambophilous species (pollinated by insects and by the wind). This dual system may be the result of system flexibility mechanism or an evolutionary transition. PMID:19637707

  17. A Peculiar New Pampatheriidae (Mammalia: Xenarthra: Cingulata) from the Pleistocene of Argentina and Comments on Pampatheriidae Diversity

    Science.gov (United States)

    Scillato-Yané, Gustavo Juan; Soibelzon, Esteban

    2015-01-01

    Pampatheriidae are a group of cingulates native to South American that are known from the middle Miocene to the lower Holocene. Two genera have been recognized between the lower Pleistocene and the lower Holocene: Pampatherium Gervais and Ameghino (Ensenadan, Bonaerian and Lujanian, lower Pleistocene–lower Holocene) and Holmesina Simpson (Blancan, Irvingtonian, upper Pliocene–lower Holocene). They have been mainly differentiated by their osteoderm morphology and cranio-dental characters. These taxa had a wide latitudinal distribution, extending from the southern part of South America (Península Valdés, Argentina) to North America (Florida, USA). In this contribution, we describe a new genus and species of Pampatheriidae for the lower and middle Pleistocene of Buenos Aires Province and for the upper Pleistocene of Santa Fe Province (Argentina).The new taxon is represented by disarticulated osteoderms, one skull element, two thoracic vertebrae and a right femur and patella. It has extremely complex osteoderm ornamentations and particular morphological characters of the cranial element and femur that are not found in any other species of the family. This new taxon, recorded in the lower–middle Pleistocene (Ensenadan Stage/Age) and in the upper Pleistocene–early Holocene (Lujanian Stage/Age), is incorporated to the Pleistocene mammal assemblage of South America. Finally, the Pampatheriidae diversity is greater during the Lujanian Stage/Age than the Ensenadan Stage/Age. PMID:26083486

  18. Detection of Orthobunyavirus in mosquitoes collected in Argentina.

    Science.gov (United States)

    Tauro, L B; Batallan, G P; Rivarola, M E; Visintin, A; Berrón, C I; Sousa, E C; Diaz, L A; Almiron, W R; Nunes, M R; Contigiani, M S

    2015-09-01

    Bunyamwera virus (BUNV) (Bunyaviridae, genus Orthobunyavirus, serogroup Bunyamwera) is considered an emerging pathogen for humans and animals in American countries. The CbaAr-426 strain of BUNV was recovered from mosquitoes Ochlerotatus albifasciatus (Diptera: Culicidae) collected in Córdoba province (Argentina), where serological studies detected high seroprevalences in humans and animals. Molecular detection of Orthobunyavirus was performed in mosquitoes collected in Córdoba province. Seventeen mosquito pools of Oc. albifasciatus, Ochlerotatus scapularis and Culex quinquefasciatus (Diptera: Culicidae) showed positive results; four of these positive pools, all of Oc. scapularis, were sequenced. All amplicons grouped with BUNV in the Bunyamwera serogroup. The findings highlight the circulation of BUNV in Córdoba province and represent the first report of BUNV-infected Oc. scapularis mosquitoes in Argentina. PMID:25991544

  19. Argentina Welcomes Chinese Enterprises

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    @@ On July 13,China-Argentina Entrepreneur Luncheon Meeting was held in Beijing.Cristina Fernandez de Kirchner,President of Argentina,Hui Liangyu,Vice Prime Minister of China and Wan Jifei,President of CCPIT attended the meeting.

  20. La escritura epistolar como registro de la experiencia de encierro y represión en las cárceles argentinas (1974-1983

    Directory of Open Access Journals (Sweden)

    Silvina Inés Jensen

    2013-06-01

    Full Text Available En este artículo se analizan las potencialidades de la escritura epistolar para la investigación histórica de las prisiones políticas en Argentina. El corpus está constituido por cartas y peticiones de presos políticos que permanecieron detenidos en el Sistema Penitenciario Bonaerense durante la vigencia del Estado de sitio entre 1974 y 1983. Estos materiales censurados por la burocracia penitenciaria, actualmente se encuentran depositados en la Secretaría de Derechos Humanos de la Provincia de Buenos Aires. El trabajo consta de tres partes: la primera analiza el lugar que han tenido los documentos personales en la escritura de la historia de la prisión política en Argentina; la segunda describe el “archivo de la represión” en el que se encuentran conservadas las misivas y la tercera se centra en un conjunto de cartas que permiten indagar las dimensiones experiencial e institucional/represiva de la vida en las cárceles.  In this article there are analyzed the potentials of the epistolary writing for the historical investigation of the political prisons in Argentina. The corpus is constituted by letters and requests of political prisoners who remained detained in the Penitentiary Buenos Aires System between 1974 and 1983. These materials censured by the penitentiary bureaucracy, nowadays are deposited in the Secretariat of Human Rights of the Province of Buenos Aires. The work consists of three parts: the first one analyzes the place that the personal documents have had in the writing of the history of the political prison in Argentina; the second one describes the " file of the repression " in which the missives are preserved and the third one center on a set of letters that allow to investigate the dimensions experiential and institutionally / repressive of the life in the jails.

  1. Research on the Differences of Evaluative Bases About Air Pollutants Emission From Cement Industry in Yunnan Province

    Science.gov (United States)

    Yu, Y.; Jiang, Y. X.; Wu, J. L.; Yan, L.; Wang, K. D.; Du, Y.

    Environment impact assessment (EIA) and the check and accepts of completed project (CACP) are two evaluative bases usually used to estimate pollutant emission. In order to find out the differences between them, this study collected the EIA approval documents and CACP reports from 50 key cement plants in Yunnan province, by statistical methods to analyze the data. Results as follows: Emission factors (EF) from EIA are much greater than CACP, data distribution difference: SO2 is significant, dust and NOx are insignificant. The EF of EIA and CACP has no relationship with linear regression analysis. Reasons: Original data used in EIA are not fit the actual pollution status completely, CACP operational difficulties and regional variation still exist. This study first found out the statistical differences between EIA and CACP in Yunnan. For increasing the accuracy of EIA, we should reference the local actual emission status in the process of EIA.

  2. The role of the invasive polychaete Ficopomatus enigmaticus (Fauvel, 1923) (Serpulidae) as facilitator of parasite transmission in Mar Chiquita coastal lagoon (Buenos Aires, Argentina).

    Science.gov (United States)

    Etchegoin, J A; Merlo, M J; Parietti, M

    2012-09-01

    In Mar Chiquita coastal lagoon (Argentina), the reefs of the invasive polychaete Ficopomatus enigmaticus (Serpulidae) serve as concentration areas for invertebrates and vertebrates and as potential foci of parasite transmission (mainly digeneans). To analyse the role of F. enigmaticus as facilitator of parasite transmission, and to evaluate the influence of the habitats selected by 2 species of cochliopid snails (Heleobia conexa and Heleobia australis), on the richness and on the prevalence of the digenean assemblages that parasitize them, 1945 snails were collected from 2 sampling sites. The comparisons between larval digenean communities parasitizing both snail hosts revealed significant differences related to the overall prevalence and the prevalence contributed by birds in the snails collected from reefs. These results support the idea that the reefs may increase the number of links between intermediate and definitive hosts of digeneans, facilitating parasite transmission only when the aggregates of F. enigmaticus become the unique habitat of the snail host. This first report of an exotic species acting as facilitator of parasite transmission in an estuarine area highlights the importance of analysing the effects of the assimilation process of exotic species by recently colonized environments (including the possible effects on parasite transmission).

  3. Ciliates (Protozoa from dried sediments of a temporary pond from Argentina Ciliados (Protozoa de sedimentos secos de una charca temporaria de la Argentina

    Directory of Open Access Journals (Sweden)

    Gabriela Cristina Küppers

    2009-12-01

    Full Text Available Temporary ponds represent special environments that are inhabited by organisms adapted to changing environmental conditions. Ciliates are able to survive complete loss of water in these transient habitats through cyst formation. However, ciliates from the Neotropical region in general have been poorly studied with modern techniques. The main goal of this study is to describe the ciliates in dried sediments of a temporary pond from Buenos Aires Province, Argentina, through sampling efforts that were performed 2003-2005. Soil samples were obtained during drought phases and re wetted in laboratory to establish raw and enriched cultures. Ciliates were then studied both in vivo and after impregnation with protargol. In this study, we present 4 new records for Argentina (Gonostomum affine (Stein, 1859 Sterki, 1878, Stylonychia bifaria (Stokes, 1887 Berger, 1999, Pleurotricha lanceolata (Ehrenberg, 1835 Stein, 1859, Meseres corlissi Petz and Foissner, 1992, 1 for South America (Blepharisma americanum (Suzuki, 1954 Hirshfield, Isquith and Bhandary, 1965, and 2 for the Neotropical Realm (Gonostomum strenuum (Engelmann, 1862 Sterki, 1878, Stylonychia lemnae Ammermann and Schlegel, 1983.Los cuerpos de agua temporarios son ambientes particulares que se encuentran habitados por organismos adaptados a condiciones fluctuantes. Los ciliados son capaces de sobrevivir a la pérdida completa de agua del ambiente gracias a la formación de estructuras de resistencia. Por otra parte, los ciliados de la región Neotropical han sido poco investigados con técnicas modernas. El objetivo de este estudio es referir los ciliados que se desarrollaron a partir de los sedimentos secos de una charca temporaria de la provincia de Buenos Aires, Argentina, en la que se realizaron muestreos durante el período 2003-2005. Las muestras de suelo fueron obtenidas durante las fases de sequía y luego resuspendidas en el laboratorio para realizar cultivos naturales y enriquecidos. Los

  4. Determination the atmospheric fallout in the Argentina Republic

    International Nuclear Information System (INIS)

    With the purpose to study the radioactive precipitation present in the Argentina Republic, due to the rehearsal the nuclear weapons in the atmosphere carried out in the past, you implement the environmental sampling outside of the area gives influence the nuclear facilities the Argentina during the years 1996 and 1997. The concentrations were determined Cs 137 and Sr 90 in samples air, radioactive material (rain water), milk, diet standard average and in several foods

  5. The impact of modern migrations on present-day multi-ethnic Argentina as recorded on the mitochondrial DNA genome

    Science.gov (United States)

    2011-01-01

    Background The genetic background of Argentineans is a mosaic of different continental ancestries. From colonial to present times, the genetic contribution of Europeans and sub-Saharan Africans has superposed to or replaced the indigenous genetic 'stratum'. A sample of 384 individuals representing different Argentinean provinces was collected and genotyped for the first and the second mitochondrial DNA (mtDNA) hypervariable regions, and selectively genotyped for mtDNA SNPs. This data was analyzed together with additional 440 profiles from rural and urban populations plus 304 from Native American Argentineans, all available from the literature. A worldwide database was used for phylogeographic inferences, inter-population comparisons, and admixture analysis. Samples identified as belonging to hg (hg) H2a5 were sequenced for the entire mtDNA genome. Results Phylogenetic and admixture analyses indicate that only half of the Native American component in urban Argentineans might be attributed to the legacy of extinct ancestral Argentineans and that the Spanish genetic contribution is slightly higher than the Italian one. Entire H2a5 genomes linked these Argentinean mtDNAs to the Basque Country and improved the phylogeny of this Basque autochthonous clade. The fingerprint of African slaves in urban Argentinean mtDNAs was low and it can be phylogeographically attributed predominantly to western African. The European component is significantly more prevalent in the Buenos Aires province, the main gate of entrance for Atlantic immigration to Argentina, while the Native American component is larger in North and South Argentina. AMOVA, Principal Component Analysis and hgs/haplotype patterns in Argentina revealed an important level of genetic sub-structure in the country. Conclusions Studies aimed to compare mtDNA frequency profiles from different Argentinean geographical regions (e.g., forensic and case-control studies) should take into account the important genetic

  6. Transformaciones en la dinámica política argentina. La ciudad de Buenos Aires: marginación partidaria y vitalidad del espacio público

    Directory of Open Access Journals (Sweden)

    Sebastián Mauro

    2011-11-01

    Full Text Available Normal 0 21 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabla normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} En el contexto del declive de los partidos políticos como articuladores de identidades colectivas, la ciudad de Buenos Aires, capital de Argentina, presenta una evolución particular. Luego del colapso de su sistema partidario, ganaron popularidad discursos identificados con el progresismo, facilitando la reelección del Jefe de Gobierno. Pero apenas tres años después, dicha retórica entró en un declive que condujo a la destitución del mandatario comunal y, en las elecciones posteriores, al triunfo de un candidato de centroderecha. El artículo describe e interpreta la evolución de este proceso.

  7. With everything exposed: cruelty in post-abortion care in Rosario, Argentina.

    Science.gov (United States)

    Steele, Cynthia; Chiarotti, Susana

    2004-11-01

    At the suggestion of a social worker who witnessed abusive post-abortion care at a public hospital in Rosario, Argentina, two human rights NGOs collaborated to investigate women's experiences seeking treatment for abortion complications at area public hospitals. During the year-long enquiry, more than 300 women took part. Role play was successfully used to surmount women's initial reluctance to reveal pervasive discriminatory and humiliating mistreatment. Thirty-one women later gave personal testimonies about their experiences, which were contained in the report of the research and later dramatised in a public meeting and video. The report, Con Todo al Aire (With Everything Exposed), was disseminated widely, including to the media, and a formal complaint was made to the local Ombudsman, who called for high-level action to resolve the problems. Initial denial by some health professionals that there was a serious problem was replaced by critical self-assessment within the provincial government, hospitals and medical and nursing schools, who made commitments to reform hospital practices and the medical school curriculum. Women participants also gained an understanding of their right to appropriate and humane health care. The findings from Rosario are not isolated. They are now being shored with activists and researchers in other provinces of Argentina and other countries. PMID:15938156

  8. Equine leukoencephalomalacia (ELEM due to fumonisins B1 and B2 in Argentina

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    Federico Giannitti

    2011-05-01

    Full Text Available In August 2007 an outbreak of neurological disease and sudden death in Arabian horses occurred in a farm located in Coronel Rosales County, Buenos Aires Province, Argentina. The animals were on a pasture of native grasses and supplemented ad libitum with corn kernels and wheat bran. Three horses were observed having acute neurologic signs including blindness, four leg ataxia, hyperexcitability, aimless walking and circling, followed by death in two of them. Four other horses were found dead overnight without a history of neurologic signs. The morbidity, mortality and lethality rates were 11.6%, 10% and 85.7%, respectively. Grossly, the brain showed focal areas of hemorrhage, brown-yellow discoloration and softening of the sub-cortical white matter. The microscopic brain lesions consisted of extensive areas of malacia within the white matter of the cerebral hemispheres, brainstem and cerebellum, characterized by rarefaction of the white matter with cavitations filled with proteinaceous edema, multifocal hemorrhages and mild infiltration by neutrophils, and rare eosinophils. Swollen glial cells with abundant eosinophilic cytoplasm, distinct cell borders, intracytoplasmic deeply eosinophilic globules and eccentric, hyperchromatic, occasionally pyknotic nucleus were present throughout the areas of rarefaction hemorrhage, edema and necrosis. The feed supplements contained 12,490µg/kg of fumonisin B1 and 5,251µg/ kg of fumonisin B2. This is the first reported outbreak of ELEM associated with consumption of feed supplements containing high concentrations of fumonisins in Argentina.

  9. Aedes aegypti resistance to temephos in Argentina.

    Science.gov (United States)

    Seccacini, Emilia; Lucia, Alejandro; Zerba, Eduardo; Licastro, Susana; Masuh, Hector

    2008-12-01

    Monitoring of resistance of Aedes aegypti to temephos was implemented in the provinces of Formosa and Misiones, Argentina, as a response to the need to improve the vigilance for the dengue vector in areas of high risk of dengue. Eggs collected in each locality were reared, and susceptibility to temephos was assayed using larval bioassays. A weak decrease in susceptibility of larvae to temephos was observed in Clorinda and Puerto Iguazú, indicating an incipient resistance with a resistance ratio of 3. No control failures have been observed yet, and this program should allow the early detection of a real problem in our country.

  10. Clientelism and Political Control in Rural Argentina

    Directory of Open Access Journals (Sweden)

    Fernando Landini

    2012-07-01

    Full Text Available Scholarship on clientelism frequently addresses political clientelism using strong ideological presuppositions and/or neglecting its subjective dimension. In this article I explore political clientelism in a rural community of the province of Formosa, Argentina from the peasants' point of view. The results suggest that peasants consider the clientelist relation as one that recognizes their personal needs, while the bureaucracy of the state does not. Thus, they perceive clientelist ties as legitimate, criticizing only the fact that the provision of resources by patrons takes place only during elections.

  11. Novelties in Casearia (Flacourtiaceae for Argentina NOVEDADES EN CASEARIA (FLACOURTIACEAE PARA ARGENTINA

    Directory of Open Access Journals (Sweden)

    Héctor A. Keller

    2010-07-01

    Full Text Available

    Casearia obliqua Spreng. (Flacourtiaceae is recorded for the first time to Argentina, based on
    specimens collected beside Iguazú river, in Misiones province. The taxon is here described
    and illustrated. The presence of Casearia gossypiosperma Briq. in Misiones, a tree mentioned
    in 1936 for that province, is here documented by mean herbarium material. A key for identifying
    the argentinean species is included
    Se cita por primera vez para la flora de Argentina, Casearia obliqua Spreng. (Flacourtiaceae,
    sobre la base de ejemplares recolectados junto al río Iguazú, en la provincia de Misiones. Este
    taxón es descripto e ilustrado. Se certifica mediante material de herbario la presencia en
    Misiones de Casearia gossypiosperma Briq., especie arbórea que fue mencionada para dicha
    provincia en 1936. Se incluye una clave para determinar las especies de Casearia de
    Argentina.

  12. Una exploración sobre la dimensión estatal de las (probables reglas de la política para las provincias argentinas (1976-2001 An exploration about the state dimension of the (probably politics rules to the Argentina’s provinces (1976-2001

    Directory of Open Access Journals (Sweden)

    Pamela Sosa

    2010-12-01

    Full Text Available El artículo tiene como principal objetivo explorar los impactos de las reformas estatales, iniciados en la década del ’70 en Argentina, en los escenarios de acción e interacción política de los actores políticos provinciales. Se analiza el impacto en las provincias de tres dimensiones de cambio estatal: la reconfiguración la relación entre nación y provincias a partir de las nuevas estructuras y funciones de las administraciones públicas provinciales y nacionales, los cambios cualitativos en la composición y el origen de los ingresos provinciales y, por último, los heterogéneos impactos en las provincias, especialmente en el desarrollo local, del nuevo perfil económico de la estructura estatal y la regulación gubernamental. La tesis principal del trabajo es que las reformas expresaron un proceso de desmonopolización y desestatalización de las relaciones socio políticas que plantean un novedoso escenario de interacción para los actores políticos provinciales.This article has as it principal aim to explore the impacts of states change since ’70´s middle in Argentine onto the interaction and action structure of political provincially stages and its influence to provincial actors characteristics. It focus in the influences on the provinces to tree changes state dimensions: the reconfiguration of relation ship between nation and province since commence new structure and functions of provincial and national public administrations; the qualitative changes in the origin and composition to the province incomes. Finally, it analyzes the heterogenic impacts in the provinces, especially in the local development, of the new structural economic profile and governmental regulation. This paper holds a thesis: the changes states mined a des monopolistic and des states process that made a new stage of interaction to political provincially actors.

  13. Prevalence of infection with hantavirus in rodent populations of central Argentina

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    Olga V Suárez

    2003-09-01

    Full Text Available We studied hantavirus seroprevalence and virus variability in rodent populations in Diego Gaynor, northwest of Buenos Aires province, Argentina. Rodent samplings were conducted in railroads and cropfield borders in March and July 1999, September and December 2000, and March 2001. Antibody detection was performed by an enzyme link immunosorbent assay (ELISA, using the recombinant nucleoprotein of Andes (AND virus as antigen. Tissue samples were taken from positive antibody individuals in order to confirm the presence of hantavirus genomic material and to identify virus genotypes. Akodon azarae was the most abundant species, followed by Oligoryzomys flavescens, while Calomys laucha and C. musculinus were rarely caught. We found a rate of seroprevalence of 9.3% for a total sample of 291 A. azarae and 13.5% for 37 O. flavescens. After molecular analyses of hantavirus, we confirmed the presence of hantavirus genomic material in 16 individuals with ELISA (+ results and two individuals with ELISA (-. Four amplimers for each species were sequenced and compared to the corresponding sequences of representative hantaviruses. We identified the AND Cent Lec from three O. flavescens, and the Pergamino virus from four A. azarae and from one O. flavescens. A. azarae males had higher seroprevalence than females, and heavier individuals showed higher seroprevalence than lighter ones. We did not find seroprevalence differences according to sex in O. flavescens, although this result may have been produced by the low sample size. The lowest seroprevalence was found in a period of high rodent density, when juveniles prevailed in the population. We found higher seroprevalences than those detected in previous studies for other localities of central Argentina where cases of hantavirus pulmonary syndrome (HPS have been reported. The presence of AND Cent Lec virus in rodent populations of the study area, which is responsible of HPS cases in central Argentina, suggests

  14. The Chilean granite (austral mountains of Buenos Aires-Argentina): preludial testimony of the Rifting Jurassic-Cretaceous in the Colorado and Macachin Basins

    International Nuclear Information System (INIS)

    The tectonic significance of Los Chilenos (140 16 Ma), forming the crystalline basement of the Sierras Australes de Buenos Aires, is out lighted as a preludial testimony of Jurassic-Cretaceous rifting which controlled the sedimentation in neighbouring Colorado and Macachin basins. (author)

  15. CARACTERIZACIÓN Y PROCEDENCIA DE MATERIAS PRIMAS PARA LA PRODUCCIÓN DE ALFARERÍA PREHISPÁNICA EN LA QUEBRADA DE HUMAHUACA (PROVINCIA DE JUJUY, REPÚBLICA ARGENTINA): FRX, ICP Y PETROGRAFÍA DE PASTAS (Characterization and Provenance of Raw Materials for the Production of Prehispanic Pottery in Quebrada de Humahuaca (Jujuy Province, Argentina): XRF, ICP and Ceramic Petrography)

    OpenAIRE

    Nicolás E. Larcher; Clarisa Otero; M. Beatriz Cremonte

    2016-01-01

    Se presenta un avance en la investigación arqueométrica de la alfarería prehispánica de la Quebrada de Humahuaca, territorio ubicado en el extremo noroeste de Argentina. Se analizaron 72 muestras de cerámicas y arcillas por FRX e ICP en tres laboratorios distintos. La integración de los datos y su procesamiento estadístico permitió identificar 4 grupos con características químicas definidas. La petrografía de pastas aportó información extra que ayudó a corroborar la congruencia de los agrupam...

  16. Asociaciones áfido-parasitoide (Hemiptera: Aphididae; Hymenoptera: Braconidae, Aphidiinae en cultivos hortícolas orgánicos en Los Cardales, Buenos Aires, Argentina Aphid-parasitoid associations (Hemiptera: Aphididae; Hymenoptera: Braconidae, Aphidiinae on organic vegetable crops in Los Cardales, Buenos Aires, Argentina

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    Andrea V. Andorno

    2007-07-01

    Full Text Available Diez especies de áfidos (Hemiptera: Aphididae se hallaron parasitados por siete especies de parasitoides (Hymenoptera: Braconidae, Aphidiinae en cultivos hortícolas orgánicos. Myzus persicae (Sulzer fue el áfido más frecuentemente encontrado sobre una amplia variedad de cultivos, y con mayor diversidad de parasitoides asociados. Aphidius colemani Viereck fue el afidiino más usual, que ataca varias especies de áfidos. Ocho asociaciones tritróficas, involucrando Aphidius matricariae Haliday, han sido registradas por primera vez para la Argentina.Ten aphid species (Hemiptera: Aphididae were found parasitized by seven aphid parasitoid species (Hymenoptera: Braconidae, Aphidiinae on organic vegetable crops. Myzus persicae (Sulzer was the most frequent aphid found on a wide variety of crops, with the largest parasitoid diversity associated. Aphidius colemani Viereck was the most frequent aphidiine attacking several species of aphids. Eight tritrophic associations involving Aphidius matricariae Haliday are reported for the first time for Argentina.

  17. Astronomy in Argentina

    CERN Document Server

    Muriel, Hernán

    2013-01-01

    This article analyses the current state of Astronomy in Argentina and describes its origins. We briefly describe the institutions where astronomical research takes place, the observational facilities available, the training of staff and professionals, and the role of the institutions in scientific promotion. We also discuss the outreach of Astronomy towards the general public, as well as amateur activities. The article ends with an analysis of the future prospects of astronomy in Argentina.

  18. The "Private School Advantage" in Argentina

    OpenAIRE

    Gustavo E. Fischman

    2001-01-01

    Local actors' perceptions of curricular and management changes in two private schools and one neighboring public secondary school in the city of Buenos Aires, Argentina, are analyzed. An exploration was conducted of how, within an ideologically and politically pro-reform context and a widespread acceptance of the "private school advantage," principals, teachers, and students in these schools evaluated the changes (or lack of them) in management, teaching, and curriculum orientations of the se...

  19. The "Private School Advantage" in Argentina

    Directory of Open Access Journals (Sweden)

    Gustavo E. Fischman

    2001-08-01

    Full Text Available Local actors' perceptions of curricular and management changes in two private schools and one neighboring public secondary school in the city of Buenos Aires, Argentina, are analyzed. An exploration was conducted of how, within an ideologically and politically pro-reform context and a widespread acceptance of the "private school advantage," principals, teachers, and students in these schools evaluated the changes (or lack of them in management, teaching, and curriculum orientations of the secondary education sector.

  20. Dirigentes de migrantes andinos, empleados y funcionarios públicos ante "el Estado": Una mirada desde abajo para comprender procesos políticos locales (Ciudad de Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Canelo Brenda

    2008-07-01

    Full Text Available Este trabajo explora representaciones acerca del Estado presentes entre dirigentes de migrantes del área andina central (Bolivia, Perú y noroeste argentino residentes en la Ciudad de Buenos Aires y alrededores, quienes poseen una trayectoria de lucha política caracterizada por la fuerte interlocución con un otro al que entienden como "el Estado". Me interesa indagar cómo esas representaciones se relacionan con las prácticas que dichos dirigentes realizan ante el gobierno porteño en vistas a alcanzar objetivos cuyo sentido también se vincula con esa particular imagen del Estado. Asimismo, examino el significado del Estado para empleados y funcionarios públicos del GCBA con quienes esos dirigentes interactúan, cómo esa idea se liga con su práctica cotidiana al interior de instituciones estatales y cómo, en definitiva, ponen en acción al Estado orientados por esas representaciones, constreñidos por diversas regulaciones y condiciones materiales y demandados por los agentes sociales con quienes su trabajo los vincula.Este artigo explora as representações sobre o Estado presentes entre os líderes dos emigrantes da região dos Andes Centrais (Bolívia, Peru e noroeste da Argentina residentes na cidade e nos subúrbios de Buenos Aires. Estes líderes têm um histórico de luta política marcado por uma forte interlocução entre eles e o que compreendem como "o Estado". Meu interesse é investigar como estas representações se relacionam com as práticas executadas por estes líderes perante o governo desta cidade, a fim de conseguir objetivos, cujo sentido esteja ligado também a essa imagem particular de Estado. Ademais, examino o significado do Estado para empregados e funcionários públicos do GCBA com quem estes líderes interagem, como essa idéia é ligada com sua prática diária dentro das instituições do Estado e como, orientados por estas representações, confinados por vários regulamentos e por circunst

  1. ACERCA DEL USO DE PULIDORES O LITOS NO MODIFICADOS EN LA PRODUCCIÓN CERÁMICA DEL SITIO VILLAVIL (PROVINCIA DE CATAMARCA, ARGENTINA (On the Use of Unmodified Lithic Polishers in the Ceramic Production of the Villavil Site (Province of Catamarca, Argentina

    Directory of Open Access Journals (Sweden)

    Julieta Lynch

    2015-09-01

    Full Text Available El siguiente trabajo tiene como objetivo profundizar el conocimiento sobre las actividades que se desarrollaron en el sitio Villavil, localizado al norte del valle de Hualfín, provincia de Catamarca, Argentina. Se analizaron las características tecnomorfológicas y funcionales de los conjuntos cerámicos, como así también del material lítico asociado a la producción cerámica de uno de los recintos que conforman el sitio (Recinto Rectangular 1. Los resultados obtenidos han permitido profundizar acerca de las distintas etapas de producción cerámica y de los elementos líticos que habrían participado en su proceso de manufactura. ENGLISH: The main objective of this paper is to improve the knowledge of the ancient activities in the site of Villavil, located in the northern Hualfin Valley, Catamarca, Argentina. The techno-morphology, functional ceramic characteristics, and lithic material associated to ceramic production from one structure forming the archaeological site (Rectangular Structure 1 has been analyzed. These results have helped to better understand the different stages of ceramic production and the lithic elements that would have been part of the manufacturing process.

  2. Subseafloor to Sea-Air Interface Characterization of Methane Dynamics in the northern US Atlantic Margin Seep Province

    Science.gov (United States)

    Ruppel, C. D.; Kluesner, J.; Danforth, W. W.; Casso, M.; Pohlman, J.

    2015-12-01

    Since the discovery of hundreds of northern US Atlantic margin (USAM) cold seeps in 2012 and 2013, the USGS Gas Hydrates Project has undertaken intensive studies of the along-margin gas hydrate/free gas distribution, the plumbing systems sustaining seeps, seafloor gas emissions, and sea-air methane flux. Interest in the USAM is motivated both by climate change (i.e., documented ocean warming may contribute to seepage) and energy resource (i.e., the amount of gas-in-place in hydrates on the USAM is about the same as that in the northern Gulf of Mexico) issues. USGS-led field efforts have included an April 2015 study to acquire high-resolution multichannel seismic data, coincident split-beam water column methane plume imaging data, and real-time sea-air methane flux measurements between Wilmington and Norfolk Canyons and a September 2015 cruise (with OSU, UCLA, and Geomar) to collect piston cores, multicores, heat flow data, subbottom imagery, CTDs, and coincident water column imagery from Block Canyon to the Currituck Slide. In April 2015, we discovered methane seeps not included in the previously-published database, but found that some known seeps were not active. New high-resolution multi-channel seismic data revealed clear differences between the deep gas distribution in mid-Atlantic upper slope zones that are replete with (up to 240 sites) and lacking in seeps. Based on sea-air flux measurements, even shallow-water outer shelf (~125 m water depth) seeps and a 900-m-high methane plume originating on the mid-slope do not contribute methane to the atmosphere. Using thermistors placed on piston core outriggers, we will in September 2015 acquire thermal data to identify zones of high fluid advection and to constrain background geotherms in areas where heat flow has never been measured. During that same cruise, we will collect a series of piston cores across the no-hydrate/hydrate transition on the upper slope to constrain fluid and gas dynamics in this zone.

  3. Air

    Science.gov (United States)

    ... house) Industrial emissions (like smoke and chemicals from factories) Household cleaners (spray cleaners, air fresheners) Car emissions (like carbon monoxide) *All of these things make up “particle pollution.” They mostly come from cars, trucks, buses, and ...

  4. Aerial gamma spectrometry of the uranium province of Lagoa Real (Caetite, BA, Brazil): go environmental aspects and distribution of the absorbed dose in the air

    International Nuclear Information System (INIS)

    In the present study, it was analyzed the surface concentrations of the natural radioelements K, U and Th, as well as the absorbed dose rate in air caused by gamma radiation from the Lagoa Real uranium province, which is located at the center southern portion of Bahia State and comprises an area of approximately 4.600 Km2. Data from the airborne gamma ray spectrometric survey of the region (Sao Timoeo Project) carried out in 1979, was used in this study. Besides, recent data of U, Th and absorbed dose rates from the Environmental Monitoring Program of the uranium concentration plant (URA), operated in the region by the Brazilian Nuclear Industries (INB), were used with the aim of inter compare the sampling points in the same geo referenced area. Imaging geo processing software's give support to frame maps of surface concentrations and ternary maps, as well as allow the integration of these with other themes (e.g. hydrology, geology, pedology) favouring the interpretation of geo environmental process from the radioactive cartography. Considering the whole study area, it was obtained the following mean values: absorbed dose rate in air (61,08 nGy.h-1), Potassium (1,65 % K) , Uranium (3,02 ppm eU) and thorium (18,26 ppm eTh). The geological unities bounding the uranium anomalies were placed in the areas characterized by the highest values of radioelements and, as expected, the major dose levels. The use of ternary maps coupled with the geology and hydrology allowed distinguishing the relationship between the surface distribution of natural radioelements and the geo environmental aspects, including the influence of the catchment in their transport and migration. (author)

  5. La reconversión del estado durante la primera gobernación de Duhalde en la provincia de Buenos Aires The State's Process of Reform in Province of Buenos Aires during Duhalde's First Government

    Directory of Open Access Journals (Sweden)

    María Cecilia Erbetta

    2011-06-01

    Full Text Available El objetivo principal de este trabajo es mostrar el inicio en la provincia de Buenos Aires, a partir de la ley 11.184, del proceso de reforma del Estado provincial durante la primera gobernación de Eduardo Duhalde. Esto es, indagar en qué medida el contexto le otorga sentido a las prácticas y discursos de sus protagonistas, a fin de comprender cómo conviven simultáneamente una política de ajuste con la llegada de nuevos fondos de origen federal.O objetivo principal deste trabalho é mostrar o início na província de Buenos Aires, a partir da lei 11.184, do processo de reforma do Estado provincial durante o primeiro governo de Eduardo Duhalde. Isto é, indagar em que medida o contexto outorga sentido às práticas e discursos de seus protagonistas, a fim de compreender como convive simultaneamente uma política de ajuste com a chegada de novos fundos de origem federal.The principal aim of this article is to describe the beginnings of the Provincial State's process of reform in the Province of Buenos Aires, which started with the law 11.184, during Eduardo Duhalde's first government,. This is, to study in which way the context gives sense to the practices and speeches of its main actors, in order to understand how an adjustment policy coexists with the arrival of new public funds of federal origin.

  6. El ejercicio de la beneficencia. Espacio de prestigio y herramienta de control social en el centro y sur bonaerense a fines del siglo XIX Charity exercise as prestige space and social control tool, in the centre and south of Buenos Aires province at the end of nineteenth century

    Directory of Open Access Journals (Sweden)

    Yolanda de Paz Trueba

    2007-01-01

    Full Text Available En la Argentina de fines del siglo XIX se hacía indispensable para el Estado (que se sentía amenazado por el desorden social consolidarse, instalando un modelo de sociedad y de familia. El objetivo del presente trabajo es analizar las formas concretas en que las instituciones de beneficencia se erigieron en agentes moralizadores en algunas localidades del centro y sur bonaerense a fines del siglo XIX, así como los límites que los controles que se pretendía instalar por su intermedio encontraron en la práctica. En estas instituciones las mujeres pertenecientes a los sectores notables fueron transmisoras de valores y agentes de control sobre los sectores populares de la sociedad, al mismo tiempo que encontraron un canal para ejercer la ciudadanía a pesar de ser actores sociales a quienes sólo se les consideraba sujetos de derecho en tanto madres de ciudadanos.In Argentine of the end of nineteenth century, it was very important for the State (that has been feeling threaten by social disorder to consolidate itself by installing a society and a family model. This article intends to analyse not only how charity institutions could moralize agents in some towns of centre and south of Buenos Aires province, but also the limits that the imposed controls have found in practice.In those institutions, upper class women were control transmitters over popular sectors, at the same time they found a way to exercise citizenship, although they had civil rights only like mothers.

  7. Estrategias de recuperacion y conservacion de entierros humanos en el sitio paso alsina 1 (curso inferior del Río Colorado, prov. de Buenos Aires,Argentina)

    OpenAIRE

    Martínez, Gustavo Adolfo; Bayala, Pablo; Flensborg, Gustavo

    2009-01-01

    En este trabajo se describen los procedimientos aplicados en el rescate, conservación y almacenaje de la colección bioarqueológica del sitio Paso Alsina 1 (Pdo. de Patagones, Prov. de Buenos Aires). Se recuperaron 10 entierros secundarios múltiples en un área de aproximadamente 6 m2. Análisis cuantitativos indicaron la presencia de ca. 3500 unidades anatómicas, correspondientes a un NMI de 56 individuos, representados por ambos sexos y diferentes categorías etarias. El hallazgo fortuito del s...

  8. Historia natural y ecología de los ofidios (Reptilia: Serpentes) de las sierras australes de la provincia de Buenos Aires, Argentina

    OpenAIRE

    Di Pietro, Diego Omar

    2016-01-01

    En este trabajo fueron analizados diversos aspectos de la composición faunística, historia natural, ecología y distribución espacial de la comunidad de serpientes de las Sierras Australes de la provincia de Buenos Aires, o Sierras de Ventania, con el propósito de establecer prioridades de conservación. El área de muestreo comprendió los partidos de Puan, Saavedra, Tornquist, Cnel. Suárez y Cnel. Pringles, abarcando la totalidad de la unidad orográfica del sudoeste bonaerense (entre los 37°...

  9. Los heterópteros acuáticos y semiacuáticos del Parque Provincial Ernesto Tornquist (Provincia de Buenos Aires, República Argentina

    Directory of Open Access Journals (Sweden)

    Susana A. KONOPKO

    2009-01-01

    Full Text Available Se presenta una lista de las especies de Heteroptera presentes en los cuerpos de agua del Parque Provincial Ernesto Tornquist. Se registraron 18 especies de Gerromorpha y Nepomorpha distribuidas en 10 géneros y 8 familias; sólo 4 especies fueron citadas previamente para el parque. El género Merragata White, con la especie M. hebroides White, son citados aquí por primera vez para la Provincia de Buenos Aires. Se incluye una clave para las especies de Gerromorpha y Nepomorpha presentes o esperables en el Parque Provincial Ernesto Tornquist.

  10. ESTUDIOS BIOARQUEOLÓGICOS DEL SITIO PASO MAYOR, SUDOESTE DE LA PROVINCIA DE BUENOS AIRES / Bioarchaeological studies of Paso Mayor site, southwest Buenos Aires province

    Directory of Open Access Journals (Sweden)

    Clara Scabuzzo

    2013-07-01

    Full Text Available En este trabajo se resumen los estudios bioarqueológicos realizados en la colección osteológica del sitio Paso Mayor Y1S2 (partido de Coronel Pringles, Buenos Aires. Los análisis efectuados comprendieron diferentes etapas. En primer lugar se hizo un inventario de la colección y se relevaron algunas variables tafonómicas para conocer el estado general de conservación de los restos. Una segunda etapa estuvo orientada a determinar la estructura sexo-etaria de la muestra. Finalmente se efectuaron estudios de marcadores de estrés ocupacional y el relevamiento de algunas patologías de carácter infeccioso y traumático. En conjunto estos análisis muestran que en el sitio se inhumaron individuos subadultos y adultos de ambos sexos, los restos fueron enterrados de manera primaria y secundaria. La colección muestra un buen estado de conservación por lo que fue posible determinar la mayoría de los elementos óseos analizados. En cuanto a los estudios de marcadores de actividad física, estos indican la importancia de la actividad deambulatoria y el posible uso de sistemas de armas como el arco y flecha. Se registró una reacción perióstica en los miembros inferiores y un traumatismo en el esqueleto craneal. Finalmente se discute la información bioarqueológica del sitio con la publicada para otros sitios del área. Abstract This paper summarizes the bioarchaeological studies of the osteological collection recovered in Paso Mayor Y1S2 site (Coronel Pringles, Buenos Aires. Analyses were carried out in different stages. First, a detailed inventory of the collection was made and some taphonomic variables were considered in order to evaluate the general condition of the bone remains. A second phase was oriented to the determination of the age-sex structure of the sample. Finally, occupational stress markers studies were undertaken along with the observation of certain infectious and traumatic pathologies. As a whole, these analyses show the

  11. Mobility and identification processes in indigenous and migrant children’s intercultural experiences of life in Argentina

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    Ana Padawer

    2016-01-01

    Full Text Available In this paper we analyse migrants and indigenous ‘children identification processes in Argentina, considering the influence of special mobility and intercultural experiences of life in their sense of belonging. We consider how identifications and mobility by two ethnographic researches about formative experiences of mbyà- Guaraní children of misiones province and Bolivian migrants living in Buenos Aires.By two life stories, we analyse how children participate in communities of practice linked with social reproduction in contexts of mobility, which imply generation’s distinctive experiences referred to school, productive activities and expressive dimensions of social life. Our research shows the children are active producers of identifications where origin territories idealized images are stressed by transformation’s process, evidence of inter-generation’s dynamicsof membership’s definitions.

  12. WATER QUALITY INDEX AS AN TOOL FOR RIVER ASSESSMENT IN AGRICULTURAL AREAS IN THE PAMPEAN PLAINS OF ARGENTINA

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    Carlos Moscuzza

    2007-01-01

    Full Text Available The contributions of nutrients and xenobiotics by anthropogenic activities developed in riverside deteriorate water quality. In this context, the impact of different agroindustry effluents on the water quality of Salado River in Buenos Aires Province (Argentina was analyzed applying water quality indexes (WQI. Water quality index is an efficient a simple monitoring tool to instrument corrective and remediation policies. Winter and summer samplings were performed. A minimal water quality index (WQImin was calculated using only two parameters which can be easy determined in situ. The use of WQImin may be a useful methodology for river management. Meat industry appears as the most pollutant source. Since it is considered as point pollution source, effluents should be treated previous to its disposal with the available technologies.

  13. Paleolimnología de la Laguna Cerrillo del medio, Monte, provincia de Buenos Aires Paleolimnology of Laguna Cerrillo del Medio, Monte, Buenos Aires Province

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    Nauris V. Dangavs

    2008-03-01

    Full Text Available Se caracterizaron el medio físico del ambiente, la fisiografía, el sistema geomorfológico de la región, las características hidrológicas y el origen de la cubeta lagunar. La geología superficial está definida por diez unidades estratigráficas (siete litoestratigráficas y tres pedoestratigráficas. La más antigua es la Formación Ensenada del Pleistoceno medio, que constituye el sustrato regional, donde se excavó la cubeta lagunar. Encima se dispone la Formación Buenos Aires del Pleistoceno tardío, en cuya parte cuspidal se sitúa un Geosuelo Sin Nombre. Las siguientes cuatro unidades corresponden a depósitos eólicos de dunas de arcilla y loéssicos de la Formación La Postrera I, II, III y IV, de edades dispares, que abarcan desde el Pleistoceno tardío al Holoceno tardío-tardío. La Formación La Postrera II y III poseen los Geosuelos Puesto Callejón Viejo y Puesto Berrondo respectivamente. En las playas afloran depósitos aluviales, que incrementan su espesor en el lecho lagunar. En los sedimentos colmatantes se reconocieron seis depósitos, cinco representan a ambientes acuáticos: Formación Luján, Miembros La Chumbiada, Lobos y Río Salado, del Pleistoceno tardío al Holoceno temprano a medio; formación subaluvial del Holoceno tardío y la actual formación aluvial. El sexto es un depósito eólico de duna de arcilla intracuencal del Pleistoceno tardío. El conjunto de los depósitos suprayacentes a la Formación Ensenada supera los 64 ka, representados por cinco episodios de clima seco que abarcan desde el loess Bonaerense hasta la pequeña edad de hielo (IS4, IS2, D3-L3, D2-L2, D1-L1 y cinco húmedos (IS3, S3, IS1, S1 y el actual.The regional physical environment was characterized, describing the physiographic and geomorphic features, the hydrologic regime and the origin of the shallow lake basin. The surficial geology is defined by ten stratigraphic units (seven lithostratigraphic units and three geosols; the oldest

  14. Air

    International Nuclear Information System (INIS)

    In recent years several regulations and standards for air quality and limits for air pollution were issued or are in preparation by the European Union, which have severe influence on the environmental monitoring and legislation in Austria. This chapter of the environmental control report of Austria gives an overview about the legal situation of air pollution control in the European Union and in specific the legal situation in Austria. It gives a comprehensive inventory of air pollution measurements for the whole area of Austria of total suspended particulates, ozone, volatile organic compounds, nitrogen oxides, sulfur dioxide, carbon monoxide, heavy metals, benzene, dioxin, polycyclic aromatic hydrocarbons and eutrophication. For each of these pollutants the measured emission values throughout Austria are given in tables and geographical charts, the environmental impact is discussed, statistical data and time series of the emission sources are given and legal regulations and measures for an effective environmental pollution control are discussed. In particular the impact of fossil-fuel power plants on the air pollution is analyzed. (a.n.)

  15. Estratigrafía y análisis tafonómico de Bonitasaura salgadoi Apesteguía, en el sitio «La Bonita» (Cretácico superior, Río Negro, Argentina Stratigraphic and taphonomic analysis of Bonitasaura salgadoi Apesteguía (Sauropoda, Titanosauria at «La Bonita» site (Upper Cretaceous, Río Negro Province, Argentina

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    Leandro M. Pérez

    2009-06-01

    Full Text Available La localidad fosilífera «La Bonita» se ubica en las cercanías del pueblo de Cerro Policía, provincia de Río negro, Argentina. Allí afloran sedimentos continentales silicoclásticos pertenecientes a las Formaciones Bajo de la Carpa y Anacleto (Santoniano-Campaniano separadas en discordancia de la Formación Rentería (Plioceno Superior-Pleistoceno. La Formación Bajo de la Carpa se compone de areniscas, finos bancos conglomerádicos alternados con pelitas y capas de vaques. La Formación Anacleto está compuesta de capas arenopelíticas. La Formación Rentería está mayormente compuesta por conglomerados con clastos que alcanzan 15 cm de longitud, incluídos en una matriz sabulítica. El análisis de facies sugiere un regimen fluvial, con un control subacuático que oscila entre energía media y alta. Los canales arenosos, lenticulares, poseen estratificación entrecruzada indicando un agente de transporte unidireccional. El análisis tafonómico indicaría que el dinosaurio murió en las cercanías de los márgenes del río, siendo rápidamente incorporado a los sedimentos fluviales y sepultado en sucesivos eventos. La distribución especial de los huesos revela un corto transporte desde la fuente de aporte, con una leve orientación hacia el norte. La presencia de dos series de vertebras caudales con arqueamiento opistótono indican que el animal fue expuesto un período suficiente de tiempo para que actúe el rigor mortis y la disecasión. El grado de desarticulación sugiere, también, cierta exposición subaérea, aunque no en gran medida, debido a la exquisita preservación del hueso periostial.«La Bonita» is a fossiliferous locality close to the town of Cerro Policía, Río Negro Province, Argentina. At the quarry are exposed siliceous rocks belonging to the Bajo de la Carpa and Anacleto formations (Santonian-Campanian, separated by an unconformity from the Rentería Formation (Upper Pliocene-Pleistocene. The Bajo de la Carpa

  16. Procesos macroeconómicos y homicidios. Un estudio ecológico en los partidos del gran Buenos Aires (Argentina entre los años 1989 y 2006

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    Hugo Spinelli

    2008-01-01

    Full Text Available Se analizó la evolución de la tasa de homicidios en los partidos del Gran Buenos Aires, en el período comprendido entre los años 1989 y 2006, y la estimación de la relación existente entre estos eventos y los procesos macroeconómicos que se desarrollaron en Argentina durante el período descrito. Se realizó un estudio ecológico, con análisis de correlación entre series "sin tendencia" de las variables para evaluar la existencia de asociación entre la mortalidad por homicidios e indicadores macroeconómicos seleccionados (previo proceso de suavizado de la tendencia de las curvas según técnica de Hodrick-Prescott. Los principales resultados son: la tasa de homicidios disminuye durante los dos primeros años para mantenerse en una meseta hasta el año 1997, cuando comienza a aumentar. Llega a su valor máximo en el año 2002 (11,1 por 100.000 habitantes para comenzar un descenso que se ubica, en el año 2006, en valores similares a los de 1992. Fue hallada una correlación estadísticamente significativa entre la tasa de homicidios y el coeficiente de Gini (según ingresos familiares, el porcentaje de población bajo la línea de pobreza e indigencia y el PIB. No fue hallada correlación entre homicidios y desempleo. Los hallazgos sugieren que la variación de la tasa de homicidios está ligada directamente al empobrecimiento y la desigualdad, e inversamente al desarrollo económico

  17. [Hantavirus pulmonary syndrome in Buenos Aires, 2009-2014].

    Science.gov (United States)

    Iglesias, Ayelén A; Bellomo, Carla M; Martínez, Valeria P

    2016-01-01

    Andes virus is the causative agent of hantavirus pulmonary syndrome (HPS) in Argentina and neighboring countries. In our country four different areas are affected: Northwest, Southwest, Central and Northeast, where distinct Andes virus genotypes were characterized. Three genotypes were described in Buenos Aires province (Central area): AND-Buenos Aires, AND-Lechiguanas and AND-Plata. In this work, we considered all HPS cases confirmed by ELISA and real time RT-PCR during the period 2009-2014 in Buenos Aires province. The annual distribution, fatality rate and geographic distribution were analyzed. We also analyzed the genotypes involved by RT-PCR and nucleotide sequencing. Finally we evaluated epidemiological data in order to establish the route of transmission. We analyzed 1386 suspect cases of hantavirus infection from Buenos Aires province and we confirmed 88 cases of Hantavirus Pulmonary Syndrome during 2009-2014. The overall average was 14.3 cases per year. The occurrence of a HPS outbreak was confirmed in Buenos Aires province during 2013, showing a 3 fold increase in case number compared to the annual average between 2009 and 2012, tending to normalize during 2014. The overall lethality was 25.6%, with a maximum value of 45.5% in 2011. Genotype analysis was performed in 30.7% of confirmed cases, AND-BsAs show the highest incidence, it was characterized in 72% of the studied cases. Epidemiological data and results of viral genome comparison strongly suggest person-to-person transmission in the three clusters of two cases described in our study. PMID:26826986

  18. Confederações indígenas em luta por participação política, comercial e territorial: Argentina, 1852 - 1859 Argentinean native-american confederations in action: politics, commerce and territories (1852-1859

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    Gabriel Passetti

    2009-01-01

    Full Text Available Entre 1852 e 1859, a atual Argentina se encontrava politicamente dividida entre Buenos Aires e a Confederação, que congregava as demais Províncias. Nesse período, diferentes grupos étnicos dos pampas, dos Andes e da Patagônia se organizaram em confederações indígenas com o objetivo de enfrentar os avanços territoriais, defender suas autonomias e a participação em lucrativas redes de comércio. Nesta luta por autonomia política, territorial e comercial, negociaram com os grupos criollos em luta pelo poder, avaliaram seus projetos e aderiram a aquele que os reconheceu enquanto interlocutores políticos e aliados militares. Participantes ativos da política argentina, conseguiram reconquistar territórios e oferecer intensas resistências aos criollos.Argentina was divided, between 1852 and 1859 in two political groups: the Province of Buenos Aires and the Argentine Confederation. Strong native-american confederations from the pampas, the Andes and Patagonia, arose interested in political autonomy, deffence of territories and commerce. They dealed with the criollos, evaluated their project for the nation and joined those who recognized them as political and military allies. Active members of the Argentinean politics in that time, they re-conquered lands and offered intense resistances to the criollos.

  19. CARACTERIZACIÓN Y PROCEDENCIA DE MATERIAS PRIMAS PARA LA PRODUCCIÓN DE ALFARERÍA PREHISPÁNICA EN LA QUEBRADA DE HUMAHUACA (PROVINCIA DE JUJUY, REPÚBLICA ARGENTINA: FRX, ICP Y PETROGRAFÍA DE PASTAS (Characterization and Provenance of Raw Materials for the Production of Prehispanic Pottery in Quebrada de Humahuaca (Jujuy Province, Argentina: XRF, ICP and Ceramic Petrography

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    Nicolás E. Larcher

    2016-03-01

    Full Text Available Se presenta un avance en la investigación arqueométrica de la alfarería prehispánica de la Quebrada de Humahuaca, territorio ubicado en el extremo noroeste de Argentina. Se analizaron 72 muestras de cerámicas y arcillas por FRX e ICP en tres laboratorios distintos. La integración de los datos y su procesamiento estadístico permitió identificar 4 grupos con características químicas definidas. La petrografía de pastas aportó información extra que ayudó a corroborar la congruencia de los agrupamientos obtenidos. Los resultados permitieron relacionar arcillas con cerámicas, diferenciar químicamente las arcillas y cerámicas de dos sectores de la Quebrada de Humahuaca estudiados e identificar posibles evidencias de interacción. ENGLISH: This article presents a new archaeometric investigation of prehispanic pottery from Quebrada de Humahuaca, a valley in the northwesternmost region of Argentina. We assayed 72 samples from pottery and clays using X-RF and ICP in three different laboratories. Data integration and statistical processing allowed us to identify 4 groups with defined chemical signatures. Ceramic petrology provided additional information that helped us to corroborate the coherence of the clustering. The results enabled us to correlate clays with pottery, to establish chemical differences between the clays and pottery of two areas of Quebrada de Humahuaca that have been investigated archaeologically, and to identify possible evidence of social interaction.

  20. Helosis (Balanophoraceae en Argentina Helosis (Balanophoraceae in Argentina

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    José Luis Fontana

    2006-07-01

    Full Text Available Se cita por primera vez para Argentina Helosis cayennensis (Swartz Sprengel var. cayennensis en base a colecciones hechas por los autores en la Isla argentina de Apipé Grande, Ituzaingó, provincia de Corrientes. Se describe e ilustra la especie, el desarrollo de la planta y su estado de conservación. Esta cita de Helosis corresponde a un género nuevo para la flora argentina.Helosis cayennensis var. cayennensis is reported for the first time for Argentina. The species is described and ilustrated. Developement and ecology are also given. Helosis is also a new generic record for Argentina.

  1. Changes in time-use and drug use by young adults in poor neighbourhoods of Greater Buenos Aires, Argentina, after the political transitions of 2001-2002: Results of a survey

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    Mateu-Gelabert Pedro

    2011-01-01

    Full Text Available Abstract Background In some countries, "Big Events" like crises and transitions have been followed by large increases in drug use, drug injection and HIV/AIDS. Argentina experienced an economic crisis and political transition in 2001/2002 that affected how people use their time. This paper studies how time use changes between years 2001 and 2004, subsequent to these events, were associated with drug consumption in poor neighbourhoods of Greater Buenos Aires. Methods In 2003-2004, 68 current injecting drug users (IDUs and 235 young non-IDUs, aged 21-35, who lived in impoverished drug-impacted neighbourhoods in Greater Buenos Aires, were asked about time use then and in 2001. Data on weekly hours spent working or looking for work, doing housework/childcare, consuming drugs, being with friends, and hanging out in the neighbourhood, were studied in relation to time spent using drugs. Field observations and focus groups were also conducted. Results After 2001, among both IDUs and non-IDUs, mean weekly time spent working declined significantly (especially among IDUs; time spent looking for work increased, and time spent with friends and hanging out in the neighbourhood decreased. We found no increase in injecting or non-injecting drug consumption after 2001. Subjects most affected by the way the crises led to decreased work time and/or to increased time looking for work--and by the associated increase in time spent in one's neighbourhood--were most likely to increase their time using drugs. Conclusions Time use methods are useful to study changes in drug use and their relationships to every day life activities. In these previously-drug-impacted neighbourhoods, the Argentinean crisis did not lead to an increase in drug use, which somewhat contradicts our initial expectations. Nevertheless, those for whom the crises led to decreased work time, increased time looking for work, and increased time spent in indoor or outdoor neighbourhood environments, were

  2. PAISAJES DE LA MODERNIDAD EN LA PROVINCIA DE BUENOS AIRES: LA OBRA DEL ARQUITECTO FRANCISCO SALAMONE (1936-1940

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    Jimena Cruz

    2013-12-01

    Full Text Available This work seeks to understand the architecture as a part of the materiality of a social landscape and as an active element, produced by a society where he belongs. From this idea I make some considerations about the potential of the studies of the archaeology of architecture as a form of understand different problematics. I propose to illustrate this idea by studying the process of consolidation of the industrial capitalism in the Buenos Aires Province (Argentina during the 1930 decade through the changes that occurred in the urban landscape of that region. In order to accomplish that, the constructions and buildings designed by the architect Francisco Salamone were studied. They were part of an edification plan developed by the provincial government during the years 1936 to 1940. In this particular work, I consider the city of Azul, localized in the South of the Buenos Aires province where two buildings made by that architect, the cemetery and the slaughterhouse, are present.

  3. Carta dinámica del medio ambiente del Partido de Luján, provincia de Buenos Aires-República Argentina. Primer etapa

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    Nelly M. Guadalupe Leclerc

    1996-01-01

    Full Text Available La Carta Dinámica del Medio Ambiente es un instrumento que p e d , a través de la evaluación de diversos parámetros, Uevar a cabo diagnóstiws ambientales En la República Argatina son pocas las experiencias llevadas a cabo al respecto, en este caso particular resulta de sumo interés desanollar la Carta D i c a &&da a un Partido del área de inüuencia de la Universidad Nacional de Luján, smiado al oeste de la ciudad de Buenos Aires (aproximadamente 70 km, en la República -tina. Para este estudio se makwá un detallado análisis de diversos componentes del medio: topografía, &m, hidrografia, suelos, usos de la tierra, etc., y se tiene en cuenta asimismo la resultante de sus wmbiiiones: degradacih, erosión, contamhación del suelo, aire y agua, entre otros. Para representar toda la información obtenida se elaborarán dos cartas a escala 150 000; en la Carta 1 se voicarán los dafos wrrespdientes a los elementos del medio y en la Carta 2 el Estado de los mismos. Se empleará la súnbología eskwdarkda por la Unión M c a Internacional (UGI para cartas dinámicas del medio ambiente. Se aplicará procesamiento &&al, nivelación de histogramas y realce de bordes sobre la imagen LANDSAT TM 225-084 de 1992, para logm un producto especial que pemUtirá realizar interpretación visual y con ello la posterior obtención de distintos mapas temáticos. También se bizo uso de cartas topogmfícas, fotcgrañas aéreas, datos del Servicio Meteorológico Nacional y otros. Toda la información se i n t m en una base de datos mediante la uiüización del sistema de infonnaciá geográfica (SIG ARC-WFO. Aquí se presenta la primera etapa de este trabajo en donde se pmcedió al análisis de las variables relativas a la topograña, red hidrográiica, vias de wmunicacion, industrias y centros urbanos, obteniéndose wmo resultado mapas p r e h h m para la elaboración de la Carta 1.

  4. Comparación de caracteres corporales y del veneno de Bothrops alternatus entre poblaciones de las provincias de Buenos Aires y Entre Ríos, Argentina

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    Rocco, Daniela Marisa

    2011-11-01

    Full Text Available Comparamos caracteres corporales y producción de veneno de ejemplares de Bothrops alternatus de una población aislada geográficamente (Olavarría, región de Tandilia, Buenos Aires con otra en su área de distribución continua de Concordia (Entre Ríos. Estudiamos el largo corporal, peso, separación entre dientes inoculadores, cantidad de veneno y de proteínas en el veneno por ejemplar. No se hallaron diferencias en los caracteres estudiados entre ambas poblaciones (p > 0.05. Las hembras fueron mayores que los machos en ambas muestras, entre un 12-18% (p 0.5; Olavarría: 142 ± 65 mg/animal, Concordia: 160 ± 80 mg/animal, aún ajustando la cantidad de veneno producida respecto al tamaño, mediante el cociente veneno/largo corporal (p >0.6. Tampoco hubo diferencias en el contenido proteico, siendo para ambas muestras de 0.697 ± 0.096 mg de proteínas/mg de veneno seco. Nuestros datos sugieren que los ejemplares de la población aislada de Tandilia no presentan variaciones en el tamaño corporal o en la cantidad de veneno producida, respecto a los ejemplares de Concordia. Some corporal characters and venom yield of adult specimens of Bothrops alternatus from the isolated region of Olavarría (Tandilian Region, Buenos Aires and the region of continuous distribution of Concordia (Entre Ríos were compared. Corporal length, weight, separation between fangs, venom yield by snake and the amount of protein in the venom were determined. No differences in the distinct characters from specimens from both regions were found (p > 0.05. Females were greater than males in both samples, 12-18% (p 0.5; Olavarría= 142 ± 65 mg / animal, Concordia= 161 ± 80 mg / animal even adjusting the venom yield with the corporal length by the relation mg of venom / corporal length (p > 0.6. No differences were observed in the protein content of the dry venom which was of 0.697 ± 0.096 mg of protein / mg of dry venom. From the study of these samples, it could be

  5. Producción artesanal indígena: una aproximación a la problemática en la comunidad Chané de Campo Durán (Salta, Argentina Indigenous craft production: an approach to the problematic of the chané community of Campo Durán, Salta province

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    Cecilia Benedetti

    2007-12-01

    Full Text Available Este trabajo presenta un conjunto de consideraciones que surgen de una investigación en curso sobre producción artesanal indígena en la comunidad Chané de la localidad de Campo Durán, provincia de Salta, Argentina. En el contexto de las vulnerables condiciones socioeconómicas que atraviesan a este pueblo, las artesanías se presentan como una importante fuente de ingreso, al mismo tiempo que constituyen una de sus manifestaciones tradicionales más relevantes. Tras recorrer brevemente la historia de las artesanías Chané, se señalan las problemáticas fundamentales que se presentan en torno a esta actividad en la actualidad, focalizando en la dimensión económica. En este sentido, se propone que las artesanías Chané atraviesan un proceso de dinamización. El análisis realizado en este trabajo apunta a especificar este fenómeno y a comprender sus implicancias en la estructuración de los procesos productivos y la caracterización de los productores. Desde esta perspectiva, la dinámica actual de la producción artesanal Chané se vincula con dos cuestiones: el incremento de las posibilidades de comercialización y la necesidad de diversificar las fuentes de ingreso en un contexto de precarización del trabajo asalariado.This paper presents some considerations that emerge from current research on indigenous craft production in the Chané community of Campo Durán, province of Salta, Argentina. In the context of the vulnerable social and economic situation that characterizes this group, the handicrafts are an important source of income, and also one of their most prominent traditional manifestations. After examining briefly the history of Chané handicrafts, some contemporary problems related to this activity are revealed, focusing on the economic dimension. In this sense, it is proposed that Chané crafts are undergoing a process of increased dynamism. The following analysis aims to explain this phenomenon and understand its

  6. Measuring Variance in Subnational Regimes: Results from an Expert-Based Operationalization of Democracy in the Argentine Provinces Midiendo la variación de los regímenes subnacionales: Resultados de una operacionalización basada en expertos de la democracia en las provincias argentinas

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    Carlos Gervasoni

    2010-01-01

    Full Text Available This paper presents an expert-based operationalization strategy to measure the degree of democracy in the Argentine provinces. Starting with a mainstream and “thick” definition of regime type, I assess each of its aspects using a subjective or perception-based approach that taps the knowledge of experts on the politics of each province. I present and justify the methodological design of the resulting Survey of Experts on Provincial Politics (SEPP and conduct a preliminary analysis of its results. Some aspects of the provincial regimes appear to be clearly democratic, while others are mixed or even leaning towards authoritarianism. Moreover, some show little interprovincial variance, while others vary considerably from province to province. An analysis of the central tendency and dispersion of the survey items allows for a general description of the Argentine provincial regimes. Inclusion is the most democratic dimension, while the effectiveness of institutional constraints on the power of the Executive is the most deficient. Electoral contestation is generally free of traditional forms of fraud, but incumbents often command far more campaign resources and media attention than do their challengers. Physical repression is rare, but opponents in some provinces face subtler forms of punishment. While the survey does not uncover any clear cases of subnational authoritarianism, stricto sensu, provincial regimes do vary significantly from basically democratic to clearly hybrid. Este artículo presenta una estrategia de operacionalización basada en expertos para medir el grado de democracia en las provincias argentinas. Partiendo de una definición convencional y “densa” del tipo de régimen, se evalúan cada uno de sus aspectos usando un enfoque subjetivo o basado en percepciones, que explota el conocimiento de expertos en la política de cada provincia. Se presenta y justifica el diseño metodológico de la resultante Encuesta de Expertos en

  7. El intrusivo López Lecube: Evidencias de magmatismo alcalino Gondwánico en el sector sudoeste de la provincia de Buenos Aires, Argentina

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    D.A. Gregori

    2003-06-01

    Full Text Available El Intrusivo López Lecube, de edad Pérmica, aflora en el sector SO de la Provincia de Buenos Aires, desconectado de rocas ígneas o sedimentarias que le hagan de caja. Está compuesto por una serie sienítica y una granítica, constituidas principalmente por cuarzo, feldespato potásico, hornblenda, plagioclasa y cantidades menores de titanita, biotita y apatito. Las características geoquímicas de la serie sienítica indican que ella deriva de magmas de manto y muestran rasgos peraluminosos a metaluminosos. Estas rocas se encuentran enriquecidas en LILE y deprimidos en HFSE. La serie granítica presenta una composición que se extiende desde levemente metaluminosa a peraluminosa, indicando participación de componentes corticales en su génesis. Esta serie no deriva de la serie sienítica mediante procesos de cristalización fraccionada. El evento magmático que generó el Intrusivo López Lecube se correlaciona con el ciclo magmático Gondwánico que se desarrolló en las Provincias de La Pampa y Mendoza, debido a sus similitudes en edad y composición química.

  8. Caracterización de los Servicios de Atención en Violencia Familiar del área metropolitana de Buenos Aires, Argentina

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    Roxana Cecilia Ynoub

    1998-01-01

    Full Text Available Se presentan, en este trabajo, un diagnóstico y evaluación de la disponibilidad de servicios existentes en la región metropolitana de Buenos Aires para la atención en Violencia Familiar Contra la Mujer. De ellos se describen las redes existentes y las articulaciones intersectoriales. Asimismo se evaluan su desarrollo institucional, los enfoques teóricos, las modalidades de intervención y la producción de información e investigaciones. Entre los resultados, se destaca la presencia de distintas perspectivas teóricas ­ particularmente entre quienes incluyen o no la temática de género ­, a las que corresponden distintas modalidades de intervención; y las conexiones ­ más informales que formales ­ entre distintos sectores y áreas oficiales y las organizaciones no gubernamentales. Finalmente se proponen las experiencias institucionales desarrolladas en esta tema como un modelo de nuevas modalidades en el diseño de políticas públicas y de salud.

  9. Phylogenetic and molecular analyses of human parainfluenza type 3 virus in Buenos Aires, Argentina, between 2009 and 2013: The emergence of new genetic lineages.

    Science.gov (United States)

    Goya, Stephanie; Mistchenko, Alicia Susana; Viegas, Mariana

    2016-04-01

    Despite that human parainfluenza type 3 viruses (HPIV3) are one of the leading causes of acute lower respiratory tract infections in children under five, there is no licensed vaccine and there is limited current information on the molecular characteristics of regional and global circulating strains. The aim of this study was to describe the molecular characterization of HPIV3 circulating in Buenos Aires. We performed a genetic and phylogenetic analysis of the HN glycoprotein gene. Between 2009 and 2013, 124 HPIV3-positive samples taken from hospitalized pediatric patients were analyzed. Four new genetic lineages were described. Among them, C1c and C3d lineages showed local circulation patterns, whereas C3e and C3f comprised sequences from very distant countries. Despite the diversity of the described genotypes, C3a and C3d predominated over the others, the latter was present during the first years of the study and it was progressively replaced by C3a. Molecular analyses showed 28 non-synonymous substitutions; of these, 13 were located in potentially predicted B-cell epitopes. Taken together, the emergence of genetic lineages and the information of the molecular characteristics of HN protein may contribute to the general knowledge of HPIV3 molecular epidemiology for future vaccine development and antiviral therapies. PMID:26780643

  10. Factores predictivos de la no adherencia al tratamiento de la tuberculosis en municipios del Área Metropolitana de Buenos Aires, Argentina

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    Silvina Arrossi

    2012-01-01

    Full Text Available El objetivo de este estudio fue identificar las características sociodemográficas de los pacientes y las características del tratamiento que influyen en la no-adherencia al tratamiento antituberculoso. Se realizó un estudio de corte transversal, en el Área Metropolitana de Buenos Aires. Se encuestaron 38 pacientes que no adhirieron al tratamiento y 85 pacientes que adhirieron al tratamiento, diagnosticados durante el año 2007, residentes y atendidos en hospitales de municipios seleccionados. El análisis de los factores se llevó a cabo mediante regresión logística. Los resultados indican que los pacientes con viviendas sin agua, tuvieron 3 veces más probabilidad de no adherencia (OR=2,8; IC95% 1,1-6,9. Asimismo, los pacientes que realizaban los controles en un hospital tuvieron 3 veces más riesgo de no adherir que los que los realizaban en centros de atención primaria (OR=3,2; IC95% 1,1-8,9. Estos resultados permiten delinear un perfil de paciente en riesgo de no-adherencia, caracterizado por estar en condiciones de pobreza, y con dificultades de acceso a la atención de su salud.

  11. Diarrea en lechones lactantes y posdestete de cuatro criaderos intensivos de la provincia de Buenos Aires, Argentina: identificación e índice de detección de partículas virales en materia fecal por microscopía electrónica

    OpenAIRE

    Aguirre, José Ignacio; Petruccelli, Miguel Ángel; Armocida, A.; Moredo, Fabiana; Risso, Miguel Atilio; Venturini, María Lucila; Idiart, Julio Roberto; Perfumo, Carlos J.

    2000-01-01

    El presente estudio preliminar tuvo como objetivo identificar y determinar el índice de detección de partículas virales en heces diarreicas de lechones de 4 establecimientos intensivos de la Provincia de Buenos Aires, Argentina, empleando la técnica de tinción negativa en microscopía electrónica (TNME). Esta técnica ha venido empleándose durante décadas por su rapidez, sencillez y sensibilidad. Se estudiaron un total de 146 muestras pertenecientes a lechones lactantes (50) y a lechones posdes...

  12. Measurements of atmospheric fallout in Argentina

    International Nuclear Information System (INIS)

    With the purpose of studying the radioactive fallout present in Argentina from atmospheric nuclear explosions tests that have been conducted recently, an environmental monitoring program, outside the influence of nuclear facilities of Argentina, was undertaken during 1996 and 1997. The levels of Cs-137 and Sr-90 were analysed in samples of air, deposited material (rainwater), milk, an average meal of a standard man and food. During this period, a total of 630 radiochemical analysis were performed on 325 samples of the different matrices described. The concentration levels of the radionuclides analysed in the different environmental matrices are presented and are compared with the values obtained in the environmental monitoring program done during the period 1960-1981. (author)

  13. Subduction of the South Chile active spreading ridge: A 17 Ma to 3 Ma magmatic record in central Patagonia (western edge of Meseta del Lago Buenos Aires, Argentina)

    Science.gov (United States)

    Boutonnet, E.; Arnaud, N.; Guivel, C.; Lagabrielle, Y.; Scalabrino, B.; Espinoza, F.

    2010-01-01

    The Chile Triple Junction is a natural laboratory to study the interactions between magmatism and tectonics during the subduction of an active spreading ridge beneath a continent. The MLBA plateau (Meseta del Lago Buenos Aires) is one of the Neogene alkali basaltic plateaus located in the back-arc region of the Andean Cordillera at the latitude of the current Chile Triple Junction. The genesis of MLBA can be related with successive opening of slabs windows beneath Patagonia: within the subducting Nazca Plate itself and between the Nazca and Antarctic plates. Detailed 40Ar/ 39Ar dating and geochemical analysis of bimodal magmatism from the western flank of the MLBA show major changes in the back-arc magmatism which occurred between 14.5 Ma and 12.5 Ma with the transition from calc-alkaline lavas (Cerro Plomo) to alkaline lavas (MLBA) in relation with slab window opening. In a second step, at 4-3 Ma, alkaline felsic intrusions were emplaced in the western flank of the MLBA coevally with the MLBA basalts with which they are genetically related. These late OIB-like alkaline to transitional basalts were generated by partial melting of the subslab asthenosphere of the subducting Nazca plate during the opening of the South Chile spreading ridge-related slab window. These basalts differentiated with small amounts of assimilation in shallow magma chambers emplaced along transtensional to extensional zones. The close association of bimodal magmatism with extensional tectonic features in the western MLBA is a strong support to the model of Patagonian collapse event proposed to have taken place between 5 and 3 Ma as a consequence of the presence of the asthenospheric window (SCR-1 segment of South Chile Ridge) below the MLBA area.

  14. Judges of peace, masons and conservatives on Buenos Airesïcountryside. An approximation to the personal links on the south of the Buenos Airesïprovince (Tres Arroyos, 1865-1910 Jueces de paz, masones y conservadores en la campaña bonaerense: Una aproximación a las redes vinculares en el sur de la provincia de Buenos Aires [Tres Arroyos, 1865-1910

    Directory of Open Access Journals (Sweden)

    Leandro A. Di Gresia

    2010-01-01

    Full Text Available The purpose of this article is to analyze the way in which Justice of the Peace was implemented in Buenos Aires Province, Argentina, between 1865 and 1910, through the study of the subjects who acted in such capacity and the political framework in which they took part. The work was carried out taking into account one particular Justice of the Peace Office, the one located at Tres Arroyos County. On the one hand, the profile of the subjects who acted as Justices of the Peace is reconstructed so as to understand the logics guiding the appointment thereof. For this, research work is done in order to reconstruct their biographies associated to the different terms of office and local institutionalization. Then, two grouping modes that served as a relational basis for local individuals and that allowed to complete the explanation developed from individual biographies are identified: an initiation ritual-type network, as it was the case of masonry, and a local conservatism network, managed by local and powerful ranch and farm owners. Finally, it is observed if these networks had an influence on local justice administration. The sources used are several local commemorative albums, census data, local newspapers, criminal records brought before the Justice of the Peace in Tres Arroyos, the Copybook of the Justice of the Peace Office, and the Book of Records of Tres Arroyos Hiram Lodge.Este artículo se propone analizar la forma en que se implantó la Justicia de Paz en el interior de la provincia de Buenos Aires entre 1865 y 1910, a través del estudio de los sujetos que desempeñaron esa función y los entramados políticos en los que participaron. El mismo se ha realizado a partir del estudio de un Juzgado en particular, como fue el del partido de Tres Arroyos. Por un lado, se reconstruye el perfil de los sujetos que ejercieron el cargo de Jueces de Paz, con la intención de entender las lógicas que guiaron su designación. Para ello, se indaga en la

  15. Situation Analysis and Countermeasures of Urban Air Pollution Control In Shandong Province%山东省城市大气污染防治形势分析及对策建议

    Institute of Scientific and Technical Information of China (English)

    王琳琳; 刘志峰

    2016-01-01

    2014年,山东省四项主要大气污染物浓度同比有所改善,但大气环境质量不容乐观。本文在介绍山东省大气环境质量概况的基础上,分析了山东省大气污染防治过程中存在的主要问题,提出了山东省大气污染防治工作的对策建议。%In Shandong province in 2014, the four major air pollutants concentration improved over the previous year, but the atmospheric environment quality is not optimistic. On the basis of the introduction of atmospheric environmental quality in Shandong province, this paper analyzed the main problems of control of atmospheric pollution in Shandong province history work, and put forward the suggestions on atmospheric pollution control work in Shandong province.

  16. Clave para el reconocimiento de la Flora Leñosa Nativa del sitio Rasmar Jaaukanigás (Provincia de Santa Fe, Argentina Key to the recognition of indigenous tree and shrub species from Sitio Ramsar Jaaukanigás (Province of Santa Fe, Argentina

    Directory of Open Access Journals (Sweden)

    G. D. Marino

    2006-07-01

    Full Text Available El conocimiento de la vegetación nativa es esencial para la investigación biológica y el diseño de planes de manejo y conservación de la biodiversidad en áreas protegidas. Diversas especies leñosas del valle de inundación del Río Paraná Medio son cruciales para el funcionamiento del ecosistema fluvial, además de ser aprovechadas localmente para la elaboración de medicinas y alimentos o como recursos madereros, tanineros y melíferos. No obstante, no existe hasta el presente un trabajo que facilite su reconocimiento. El objetivo de este trabajo fue elaborar una herramienta sistemática versátil para el reconocimiento a campo, a través de caracteres vegetativos, de las especies leñosas del Sitio Ramsar Jaaukanigás (Santa Fe, Argentina, área protegida que concentra una elevada diversidad biológica. Se presenta una clave botánica elaborada sobre la base de 36 caracteres vegetativos de fácil observación, que incluye 50 especies distribuidas en 44 géneros y 23 familias.The recognition of native vegetation is the first step on biological conservation and management planning in protected areas. The ligneous species of Paraná River floodplain are