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  1. 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.

  2. 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.

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

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    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.

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

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    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.

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

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    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…

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

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    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.

  7. 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.

  8. 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

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    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

  9. 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

  10. Triatoma infestans in Greater Buenos Aires, Argentina

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    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.

  11. 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

  12. 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)

  13. 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)

  14. 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

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

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    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.

  16. 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

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

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    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.

  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. 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.

  20. 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.

  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. 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...

  3. 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...

  4. 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

  5. Factors associated with healthcare avoidance among transgender women in Argentina

    OpenAIRE

    Socías, María Eugenia; Marshall, Brandon DL; Arístegui, Inés; Romero, Marcela; Cahn, Pedro; Kerr, Thomas; Sued, Omar

    2014-01-01

    Introduction Transgender (TG) women in many settings continue to contend with barriers to healthcare, including experiences of stigma and discrimination. Argentina has a universal health care system and laws designed to promote healthcare access among TG women. However, little is known about barriers to healthcare access among TG women in this setting. The aim of this study was to explore individual, social-structural and environmental factors associated with healthcare avoidance among TG wom...

  6. 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

  7. 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.

  8. 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.

  9. 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

  10. 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...

  11. 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.

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

    Directory of Open Access Journals (Sweden)

    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

  13. 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

  14. 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.

  15. 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

  16. 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.

  17. Argentina

    Directory of Open Access Journals (Sweden)

    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.

  18. 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...

  19. 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

    Directory of Open Access Journals (Sweden)

    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

  20. 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.

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

    Directory of Open Access Journals (Sweden)

    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.

  2. 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...

  3. Opening Address (by A. Gonzales) [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)

    We are glad to welcome all of you, arriving from the four corners of the world, to our city Buenos Aires. Preparatory work for the 12th International Congress of the International Radiation Protection Association (IRPA12) is complete. Great personal efforts and immense professional dedication from many unnamed people has made this possible. The renowned IRPA Congress will take place for the first time in Latin America and will be attended by a massive audience arriving from more than 80 countries around the world. This is the first time in the history of IRPA Congresses that such 'internationalization' is taking place. IRPA12 marks a turning point; IRPA's intentions to globalize the profession are actually being realized and IRPA12's motto, 'strengthening radiation protection worldwide' is coming into effect. The unremitting work of IRPA12's programme and support committees has led to achievement of their main aims, namely: (i) a renewed scientific programme that will give an exceptional overview of the latest developments in the science and practice of radiation protection, coupled with a novel programme of refresher courses and tutorial seminars that include professional accreditation for the first time, and; (ii) generous support for scientists from developing countries who will have the opportunity to attend an IRPA Congress

  4. 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.

  5. 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

  6. "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…

  7. 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.

  8. 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.

  9. 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

  10. [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

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

    Directory of Open Access Journals (Sweden)

    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.

  12. 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.

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

    Science.gov (United States)

    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.

  14. 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.

  15. 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

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

    Directory of Open Access Journals (Sweden)

    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.

  17. 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.

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Institute of Scientific and Technical Information of China (English)

    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.

  20. 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

  1. 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.

  2. 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.

  3. 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

  4. Estacionamiento subterráneo en Buenos Aires República Argentina

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    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.

  5. Closing Remarks (by A. Gonzalez) [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)

    The 12th International Congress of the International Radiation Protection Association (IRPA12) has reconfirmed the strong scientific basis on which radiation protection is founded. On one hand, physical sciences characterizing radiation exposure have reached a high level of sophistication. On the other hand, the biological sciences that estimate radiation health effects have undergone a great deal of development in the last years, reaching a level of insight that was unimaginable just a few years ago. Significant advances in the description and quantification of ionizing radiation, as well as a better understanding of radiation exposure effects were presented at the Congress. They have transformed our related knowledge from implicit simplicity to intricate complexity. The final outcome of an exposure situation will probably continue to be simply described by a bare nominal radiation risk coefficient, expressed as probability per unit of effective dose incurred, but the biological mechanisms leading to health effects from radiation have proven to be extremely sophisticated and complex. IRPA12 has shown that radiobiology has come far from the simple target model for radiation effects, which was the preferred paradigm for expressing radiation induced harm as recently as the IRPA10 Congress just a decade ago. Plenty of papers were submitted to the Congress describing complex mechanisms for the interaction of radiation with living matter. Bystander effects, genomic instability, adaptive responses, abscopal effects, and clastogenic plasma factors are among the great variety of recently discovered cell and tissue response mechanisms that were discussed at the Congress. A new understanding of radiation effects is emerging which describes how complex the outcome of radiation interaction with cell structure is. IRPA12 has shown how much is known about this complicated phenomenon, perhaps much more than is known about the interaction of other pollutants with cells; but the

  6. 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...

  7. Human Papillomavirus Cervical Infection and Associated Risk Factors in a Region of Argentina With a High Incidence of Cervical Carcinoma

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    S. A. Tonon

    1999-01-01

    Full Text Available Objective: To assess the prevalence and potential risk factors associated with human papillomavirus (HPV cervical infection among women residing in a region of northeastern Argentina with a high incidence of cervical cancer.

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

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    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.

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

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    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.

  10. 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.

  11. [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

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

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    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.

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

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    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.

  14. [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.

  15. 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.

  16. 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.

  17. 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

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

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    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.

  19. 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

  20. 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

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

    Science.gov (United States)

    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

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

    Directory of Open Access Journals (Sweden)

    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.

  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

    Directory of Open Access Journals (Sweden)

    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

  4. 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.

  5. 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

    Directory of Open Access Journals (Sweden)

    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

  6. 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

  7. 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

  8. China International Friendship Cities Association Delegation Visits Brazil and Argentina

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    <正>Invited by the UNALE (National Union of Legislative Assemblies of Federated States of Brazil) and the State Legislative Assembly of Santa Catarina, the CPAFFC sent a delegation from the China International Friendship Cities Association (CIFCA) to attend the 15th National Conference of State Legislative Assemblies and the Meeting of Chinese and Brazilian Local Governments in Florianopolis, the state capital from May 16 to 21.

  9. Asociación de sida y leishmaniosis tegumentaria americana en Argentina American tegumentary leishmaniasis associated with AIDS in Argentina

    Directory of Open Access Journals (Sweden)

    Héctor D. Romero

    2004-02-01

    Full Text Available Las migraciones a pequeños municipios y áreas rurales de personas infectadas con HIV contribuye a la diseminación progresiva del sida y a la asociación con otras infecciones prevalentes en áreas endémicas, como las parasitosis. Esta asociación significa un importante desafío para la salud pública, ya que frecuentemente ambas infecciones se potencian. En este trabajo presentamos el primer paciente autóctono con sida asociado a leishmaniosis mucocutánea procedente de la zona de Orán, donde a mediados de los 80 se desarrolló un brote epidémico de leishmaniosis que a la fecha supera más de 2000 casos confirmados parasitológicamente en nuestro Instituto. Recientemente informamos la existencia de 2 especies (Leishmania (V. braziliensis y L. (L. amasonensis como las causantes de leishmaniosis tegumentaria americana en la zona. Queremos llamar la atención de los profesionales de la salud sobre la posibilidad de coinfección HIV-Leishmania, recomendando que en pacientes de áreas endémicas con antecedentes de úlceras cutáneas indoloras o incluso cicatrizales, se investigue, entre otras enfermedades, la leishmaniosis.Migration of HIV infected individuals from cities to small towns and rural areas spreads AIDS among non urban population, superimposing HIV with other endemic or epidemic infections as parasitoses. This situation is a big challenge to public health because in most cases the association between these infections worsens both prognoses. We present here the first case in Argentina of AIDS associated to a mucocutaneous form of American tegumentary leishmaniasis. The patient was from Orán, an area where in the middle eighties, an epidemic outbreak took place. By now more than 2000 cases have been parasitologically confirmed in our Institute and the causing species were identified as Leishmania (V. braziliensis and L. (L. amasonensis. Considering the existence of co-infection of HIV and Leishmania, it is recommended that in

  10. 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...

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

    Science.gov (United States)

    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

  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. 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.

  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

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    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. ELA-DRA polymorphisms are not associated with Equine Arteritis Virus infection in horses from Argentina.

    Science.gov (United States)

    Kalemkerian, P B; Metz, G E; Peral-Garcia, P; Echeverria, M G; Giovambattista, G; Díaz, S

    2012-12-01

    Polymorphisms at Major Histocompatibility Complex (MHC) genes have been associated with resistance/susceptibility to infectious diseases in domestic animals. The aim of this investigation was to evaluate whether polymorphisms of the DRA gene the Equine Lymphocyte Antigen is associated with susceptibility to Equine Arteritis Virus (EAV) infection in horses in Argentina. The equine DRA gene was screened for polymorphisms using Pyrosequencing® Technology which allowed the detection of three ELA-DRA exon 2 alleles. Neither allele frequencies nor genotypic differentiation exhibited any statistically significant (P-values=0.788 and 0.745) differences between the EAV-infected and no-infected horses. Fisher's exact test and OR calculations did not show any significant association. As a consequence, no association could be established between the serological condition and ELA-DRA.

  17. High Diversity of Rabies Viruses Associated with Insectivorous Bats in Argentina: Presence of Several Independent Enzootics

    Science.gov (United States)

    Piñero, Carolina; Gury Dohmen, Federico; Beltran, Fernando; Martinez, Leila; Novaro, Laura; Russo, Susana; Palacios, Gustavo; Cisterna, Daniel M.

    2012-01-01

    Background Rabies is a fatal infection of the central nervous system primarily transmitted by rabid animal bites. Rabies virus (RABV) circulates through two different epidemiological cycles: terrestrial and aerial, where dogs, foxes or skunks and bats, respectively, act as the most relevant reservoirs and/or vectors. It is widely accepted that insectivorous bats are not important vectors of RABV in Argentina despite the great diversity of bat species and the extensive Argentinean territory. Methods We studied the positivity rate of RABV detection in different areas of the country, and the antigenic and genetic diversity of 99 rabies virus (RABV) strains obtained from 14 species of insectivorous bats collected in Argentina between 1991 and 2008. Results Based on the analysis of bats received for RABV analysis by the National Rabies system of surveillance, the positivity rate of RABV in insectivorous bats ranged from 3.1 to 5.4%, depending on the geographic location. The findings were distributed among an extensive area of the Argentinean territory. The 99 strains of insectivorous bat-related sequences were divided into six distinct lineages associated with Tadarida brasiliensis, Myotis spp, Eptesicus spp, Histiotus montanus, Lasiurus blosseviilli and Lasiurus cinereus. Comparison with RABV sequences obtained from insectivorous bats of the Americas revealed co-circulation of similar genetic variants in several countries. Finally, inter-species transmission, mostly related with Lasiurus species, was demonstrated in 11.8% of the samples. Conclusions This study demonstrates the presence of several independent enzootics of rabies in insectivorous bats of Argentina. This information is relevant to identify potential areas at risk for human and animal infection. PMID:22590657

  18. High diversity of rabies viruses associated with insectivorous bats in Argentina: presence of several independent enzootics.

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    Carolina Piñero

    Full Text Available BACKGROUND: Rabies is a fatal infection of the central nervous system primarily transmitted by rabid animal bites. Rabies virus (RABV circulates through two different epidemiological cycles: terrestrial and aerial, where dogs, foxes or skunks and bats, respectively, act as the most relevant reservoirs and/or vectors. It is widely accepted that insectivorous bats are not important vectors of RABV in Argentina despite the great diversity of bat species and the extensive Argentinean territory. METHODS: We studied the positivity rate of RABV detection in different areas of the country, and the antigenic and genetic diversity of 99 rabies virus (RABV strains obtained from 14 species of insectivorous bats collected in Argentina between 1991 and 2008. RESULTS: Based on the analysis of bats received for RABV analysis by the National Rabies system of surveillance, the positivity rate of RABV in insectivorous bats ranged from 3.1 to 5.4%, depending on the geographic location. The findings were distributed among an extensive area of the Argentinean territory. The 99 strains of insectivorous bat-related sequences were divided into six distinct lineages associated with Tadarida brasiliensis, Myotis spp, Eptesicus spp, Histiotus montanus, Lasiurus blosseviilli and Lasiurus cinereus. Comparison with RABV sequences obtained from insectivorous bats of the Americas revealed co-circulation of similar genetic variants in several countries. Finally, inter-species transmission, mostly related with Lasiurus species, was demonstrated in 11.8% of the samples. CONCLUSIONS: This study demonstrates the presence of several independent enzootics of rabies in insectivorous bats of Argentina. This information is relevant to identify potential areas at risk for human and animal infection.

  19. "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…

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

    OpenAIRE

    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...

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

    Science.gov (United States)

    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

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

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    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.

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

    Science.gov (United States)

    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.

  6. 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.

  7. 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

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    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

  8. 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

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

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    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.

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

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    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.

  11. 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

  12. 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.

  13. 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.

  14. 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

    Directory of Open Access Journals (Sweden)

    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

  15. Dolomitic marbles and associated calc-silicates, Tandilia belt, Argentina: Geothermobarometry, metamorphic evolution, and P- T path

    Science.gov (United States)

    Delpino, Sergio H.; Dristas, Jorge A.

    2008-06-01

    The metamorphic evolution of dolomitic marbles and associated calc-silicate rocks from Punta Tota (NE Tandilia belt, Buenos Aires province, Argentina) has been evaluated through petrographic, geothermobarometric, and fluid inclusion studies. Thin beds of dolomitic marble are intercalated in amphibolites and constitute the upper part of a stratified basement sequence, which starts at the base with garnet migmatites showing a great abundance of pegmatitic segregates, overlain by biotite-garnet gneisses. Peak metamorphic conditions are estimated at 750-800 °C and 5-6 kb, followed by near isobaric cooling to about 500-450 °C and 5.5-6.5 kb. Anhydrous progressive metamorphic assemblages in both marbles (Fo + Cal + Dol + Cpx + Spl) and adjacent calc-silicate rocks (Cpx + An + Cal + Qtz) strongly retrogressed to hydrous minerals (Tr, Tlc, Grs, Czo, Srp) with decreasing temperatures and increasing water activities. The intense rehydration of the rocks relates to the emplacement of volatile-rich pegmatitic bodies (Qtz + Pl + Kfs + Bt + Grt), which also resulted in the crystallization of clinochlore + phlogopite in the marble and biotite + muscovite in the adjacent calc-silicate rocks. Metamorphic reactions based on textural relations and evaluated on a suitable petrogenetic grid, combined with geothermobarometric results and fluid inclusion isochores, indicate a metamorphic evolution along a counterclockwise P- T path. Two probable geotectonic settings for the determined P- T trajectory are proposed: (1) thinning of the crust and overlying supracrustal basin in an ensialic intraplate tectonic setting and (2) development of a marginal back-arc basin, associated with an oceanic-continental convergent plate margin. In both models, the initial extensional regime is followed by a compressional stage, with overthickening of the basement and supracrustal rocks, during the climax of the Transamazonian cycle at approximately 1800 Ma ago. Continuous convergence and blockage of

  16. 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

  17. 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...

  18. [Factors associated with overweight in students from tri-border region: Argentina, Brazil and Paraguay].

    Science.gov (United States)

    Legnani, Elto; Legnani, Rosimeide Francisco Santos; Filho, Valter Cordeiro Barbosa; Krinski, Kleverton; Elsangedy, Hassan Muhamed; de Campos, Wagner; da Silva, Sergio Gregório; Lopes, Adair da Silva

    2010-12-01

    The Tri-Border Region has several social and health problems among young people, however, there are no data about the overweight between adolescents. This study investigated the prevalence of overweight and associated factors in students from Tri-Border Region: Argentina, Brazil and Paraguay. Study participants were 1.183 students, ages from 15 to 18 years. The overweight was identified according to body mass index cut-off points proposed by the World Health Organization. The Global School-Based Student Health Survey questionnaire was used to identify sociodemographic (gender and age) and behavioral factors (physical activity outside of school, commuting to school, time watching TV and fruits, vegetables, sweet, and salty snack consumption) associated with overweight in adolescents. It was used the descriptive statistics, analysis of variance, chi-square and binary logistic regression, adopting p < 0.05. Thirteen percent of students were overweight. Boys were approximately two times more likely to have overweight than girls, independently of nationality. Brazilian students that realized passive commuting to school and Argentineans students with low consumption of vegetables (< 1 time/day) were 2.2 and 2.9 times more likely to have overweight than their counterparts who performed active commuting to school and consumed vegetables daily, respectively. These results suggest that public policies to combat overweight should attention on promoting healthy lifestyle among young people from Tri-Border Region.

  19. Host association of Spodoptera frugiperda (Lepidoptera: Noctuidae) corn and rice strains in Argentina, Brazil, and Paraguay.

    Science.gov (United States)

    Juárez, M Laura; Murúa, M Gabriela; García, M Gabriela; Ontivero, Marta; Vera, M Teresa; Vilardi, Juan C; Groot, Astrid T; Castagnaro, Atilio P; Gastaminza, Gerardo; Willink, Eduardo

    2012-04-01

    Spodoptera frugiperda (J.E. Smith) is composed of two genetically distinct strains, the so-called corn strain and the rice strain. Whether the two strains differ in their host use is unclear, because laboratory experiments have not been able to show consistent host performance or preference differences between them, and field studies showed high rates of hybridization, as well as some degree asymmetric host use. To determine the distribution of the two strains and their association with host plants, we collected fall armyworm larvae from different crops (corn, rice, alfalfa, and sorghum) and grasses in 15 different localities over 4 yr in Argentina, Brazil, and Paraguay. The strain identity was analyzed using two polymorphisms in the mitochondrial cytochrome oxidase subunit I gene. We identified the corn and rice haplotypes and three types of populations were characterized based on the frequencies of the individuals that belonged to any of these haplotypes: in 44% of populations the corn haplotype predominated, in 44% of populations the rice haplotype was the most frequent, and 11% of populations showed both haplotypes at similar proportions. In total, eight populations (47%) showed the expected pattern, two populations (12%) were polymorphic within the same field, and seven populations (41%) showed the inverse pattern. Taken together, there was no consistent pattern of host association between the two sympatric genotypes and their respective host plants. This investigation supports the need for additional studies to determine which other forces keep the genotypes separate, and what is the degree of genetic differentiation between these populations.

  20. An illustrated key to and diagnoses of the species of Histeridae (Coleoptera) associated with decaying carcasses in Argentina

    Science.gov (United States)

    Aballay, Fernando H.; Arriagada, Gerardo; Flores, Gustavo E.; Néstor D. Centeno

    2013-01-01

    Abstract A key to 16 histerid species associated with decaying carcasses in Argentina is presented, including diagnoses and habitus photographs for these species. This article provides a table of all species associated with carcasses, detailing the substrate from which they were collected and geographical distribution by province. All 16 Histeridae species registered are grouped into three subfamilies: Saprininae (twelve species of Euspilotus Lewis and one species of Xerosaprinus Wenzel), Histerinae (one species of Hololepta Paykull and one species of Phelister Marseul) and Dendrophilinae (one species of Carcinops Marseul). Two species are new records for Argentina: Phelister rufinotus Marseuland Carcinops troglodytes (Paykull). A discussion is presented on the potential forensic importance of some species collected on human and pig carcasses. PMID:23653510

  1. 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

  2. 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.

  3. Weather Variability Associated with Aedes (Stegomyia) aegypti (Dengue Vector) Oviposition Dynamics in Northwestern Argentina.

    Science.gov (United States)

    Estallo, Elizabet L; Ludueña-Almeida, Francisco F; Introini, María V; Zaidenberg, Mario; Almirón, Walter R

    2015-01-01

    This study aims to develop a forecasting model by assessing the weather variability associated with seasonal fluctuation of Aedes aegypti oviposition dynamic at a city level in Orán, in northwestern Argentina. Oviposition dynamics were assessed by weekly monitoring of 90 ovitraps in the urban area during 2005-2007. Correlations were performed between the number of eggs collected weekly and weather variables (rainfall, photoperiod, vapor pressure of water, temperature, and relative humidity) with and without time lags (1 to 6 weeks). A stepwise multiple linear regression analysis was performed with the set of meteorological variables from the first year of study with the variables in the time lags that best correlated with the oviposition. Model validation was conducted using the data from the second year of study (October 2006- 2007). Minimum temperature and rainfall were the most important variables. No eggs were found at temperatures below 10 °C. The most significant time lags were 3 weeks for minimum temperature and rains, 3 weeks for water vapor pressure, and 6 weeks for maximum temperature. Aedes aegypti could be expected in Orán three weeks after rains with adequate min temperatures. The best-fit forecasting model for the combined meteorological variables explained 70 % of the variance (adj. R(2)). The correlation between Ae. aegypti oviposition observed and estimated by the forecasting model resulted in rs = 0.80 (P vector activity can be predicted three or four weeks in advance. PMID:25993415

  4. 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.

  5. 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.

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Directory of Open Access Journals (Sweden)

    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. 

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

    Directory of Open Access Journals (Sweden)

    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.

  10. 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

  11. 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...

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

    Directory of Open Access Journals (Sweden)

    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.

  13. 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

  14. 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.

  15. 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. ...

  16. 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 (...

  17. 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

    Directory of Open Access Journals (Sweden)

    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

  18. 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.

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

    Directory of Open Access Journals (Sweden)

    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

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

    Directory of Open Access Journals (Sweden)

    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.

  1. [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

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

    Energy Technology Data Exchange (ETDEWEB)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

  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

    this framework, we propose that the Inkas used their knowledge of different habitats and associated ecological factors to plan and guarantee the smooth functioning of each architectonic unit at every administrative center. Therefore, our goal was to establish if there is a connection between different mesoclimatic conditions at El Shincal Inka site (Catamarca, Argentina and the spatial distribution of three different architectural-functional structures (grain storage, residence, and cultivation and a control (the plaza. Six climatic variables were studied through uni and multivariate analysis. The storage area presented the best conditions for drying and preserving crop grains: the highest soil temperature, evaporative capacity, and water vapor saturation deficit of the air. The residential area showed low evaporative capacity and water vapor saturation deficit during spring and summer, making it a more comfortable place under high seasonal air temperatures. The cultivation area presented lower air evaporative capacity during days with Zonda (regional wind with Foehn-like effect and generally a mild mesoclimate that fits better the requirements of maize agroecology.

  5. 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

    Full Text Available La mirada estigmatizante de la maternidad en la adolescencia y el interés por controlar la sexualidad por parte del sector sanitario, es reciente y diferente para hombres y mujeres. Sabemos que las categorías género y edad, en tanto construcciones culturales que aluden a relaciones básicas de desigualdad -atravesadas por estructuras económico-políticas particulares-, están cargadas de significados que se dirimen en un campo social predispuesto a reforzar estereotipos naturalizantes y relaciones de dominación. El estudio se ubica en la problemática general del reconocimiento de derechos presente en los programas de salud sexual y reproductiva que tienen como destinatarias a mujeres adolescentes pobres. El recorte pone en foco el contraste entre el marco normativo y el significado que asume la maternidad para las adolescentes. Para ello, se analizan programas de salud nacionales, de la Pcia. de Buenos Aires y de la municipalidad de La Plata y discursos obtenidos en entrevistas realizadas a veinte adolescentes residentes en barrios pobres de la ciudad de La Plata. El análisis de los programas explora la incorporación del enfoque de género y la interpretación de los problemas de sexualidad/reproducción de l@s adolescentes en el marco de los derechos humanos y el de los discursos de las entrevistadas indaga su interpelación.Stigmatizing gaze of teenage motherhood and the aim to control the sexuality from the health sector, is recent and different for men and women. We know that gender and age categories, as cultural constructions that refer to basic relations of inequality-crossed by particular political-economic structures, are loaded with meanings that are settled in a social and naturalizing field predisposed to reinforce stereotypes and relations of domination. The study is placed in the general problem of aknowledgement of rights in the programs of sexual and reproductive health in adolescent girls from low environment. This frame

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Science.gov (United States)

    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.

  8. 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.

  9. 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...

  10. 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...

  11. 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...

  12. 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...

  13. 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...

  14. 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

  15. 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.

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

    Science.gov (United States)

    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.

  17. 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.

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

    Directory of Open Access Journals (Sweden)

    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.

  19. 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

  20. 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...

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

    Directory of Open Access Journals (Sweden)

    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.

  2. Associations of endothelial function and air temperature in diabetic subjects

    Science.gov (United States)

    Background and Objective: Epidemiological studies consistently show that air temperature is associated with changes in cardiovascular morbidity and mortality. However, the biological mechanisms underlying the association remain largely unknown. As one index of endothelial functio...

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

  5. 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

    Directory of Open Access Journals (Sweden)

    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

  6. 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...

  7. Childhood astrovirus-associated diarrhea in the ambulatory setting in a Public Hospital in Cordoba city, Argentina

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    Giordano Miguel O.

    2004-01-01

    Full Text Available Human astroviruses have been increasingly identified as important agents of diarrheal disease in children. However, the disease burden of astrovirus infection is still incompletely assessed. This paper reports results on the epidemiological and clinical characteristics of astrovirus-associated diarrhea, as well as the impact of astrovirus infection on the ambulatory setting at a Public Hospital in Córdoba city, Argentina. From February 2001 through January 2002, 97 randomly selected outpatient visits for diarrhea among children 0.05. According to our estimation about one out of seventy-four children in this cohort would be assisted annually for an astroviral-diarrheal episode in the Public Hospital and one out of eight diarrheal cases could be attributed to astrovirus infection. Astrovirus is a common symptomatic infection in pediatric outpatient visits in the public hospital in the study area, contributing 12.37% of the overall morbidity from diarrhea.

  8. 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...

  9. 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.

  10. {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.

  11. 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.

  12. 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

  13. Risk factors associated with the presence of Varroa destructor in honey bee colonies from east-central Argentina.

    Science.gov (United States)

    Giacobino, A; Bulacio Cagnolo, N; Merke, J; Orellano, E; Bertozzi, E; Masciangelo, G; Pietronave, H; Salto, C; Signorini, M

    2014-08-01

    Varroa destructor is considered one of the major threats for worldwide apiculture. Damage caused by varroa mite includes body weight loss, malformation and weakening of the bees. It was also suggested as the main cause associated with colony winter mortality and as an important vector for several honey bee viruses. Little is known about multiple factors and their interaction affecting V. destructor prevalence in apiaries from South America. The aim of this study was to identify risk factors associated with V. destructor prevalence in east-central Argentina. Parasitic mite infestation level and colony strength measures were evaluated in 63 apiaries distributed in 4 different regions in east-central Argentina in a cross sectional study. Data regarding management practices in each apiary were collected by means of a questionnaire. A mixed-effects logistic regression model was constructed to associate management variables with the risk of achieving mite infestation higher than 3%. Colonies owned by beekeepers who indicated that they did not monitor colonies after mite treatment (OR=2.305; 95% CI: 0.944-5.629) nor disinfect hives woodenware material (OR=2.722; 95% CI: 1.380-5.565) were associated with an increased risk of presenting high intensity infestation with V. destructor (>3%). On the other hand, beekeepers who reported replacing more than 50% of the queens in their operation (OR=0.305; 95% CI: 0.107-0.872), feeding colonies protein substitute containing natural pollen (OR=0.348; 95% CI: 0.129-0.941) and feeding colonies High Fructose Corn Syrup (HFCS) (OR=0.108; 95% CI: 0.032-0.364), had colonies that were less likely to have V. destructor infestations above 3%, than beekeepers who did not report using these management practices. Further research should be conducted considering that certain management practices were associated to mite infestation level in order to improve the sanitary condition in the colonies. Epidemiological studies provide key information to

  14. Risk factors associated with the presence of Varroa destructor in honey bee colonies from east-central Argentina.

    Science.gov (United States)

    Giacobino, A; Bulacio Cagnolo, N; Merke, J; Orellano, E; Bertozzi, E; Masciangelo, G; Pietronave, H; Salto, C; Signorini, M

    2014-08-01

    Varroa destructor is considered one of the major threats for worldwide apiculture. Damage caused by varroa mite includes body weight loss, malformation and weakening of the bees. It was also suggested as the main cause associated with colony winter mortality and as an important vector for several honey bee viruses. Little is known about multiple factors and their interaction affecting V. destructor prevalence in apiaries from South America. The aim of this study was to identify risk factors associated with V. destructor prevalence in east-central Argentina. Parasitic mite infestation level and colony strength measures were evaluated in 63 apiaries distributed in 4 different regions in east-central Argentina in a cross sectional study. Data regarding management practices in each apiary were collected by means of a questionnaire. A mixed-effects logistic regression model was constructed to associate management variables with the risk of achieving mite infestation higher than 3%. Colonies owned by beekeepers who indicated that they did not monitor colonies after mite treatment (OR=2.305; 95% CI: 0.944-5.629) nor disinfect hives woodenware material (OR=2.722; 95% CI: 1.380-5.565) were associated with an increased risk of presenting high intensity infestation with V. destructor (>3%). On the other hand, beekeepers who reported replacing more than 50% of the queens in their operation (OR=0.305; 95% CI: 0.107-0.872), feeding colonies protein substitute containing natural pollen (OR=0.348; 95% CI: 0.129-0.941) and feeding colonies High Fructose Corn Syrup (HFCS) (OR=0.108; 95% CI: 0.032-0.364), had colonies that were less likely to have V. destructor infestations above 3%, than beekeepers who did not report using these management practices. Further research should be conducted considering that certain management practices were associated to mite infestation level in order to improve the sanitary condition in the colonies. Epidemiological studies provide key information to

  15. Low electrical resistivity associated with plunging of the Nazca flat slab beneath Argentina.

    Science.gov (United States)

    Booker, John R; Favetto, Alicia; Pomposiello, M Cristina

    2004-05-27

    Beneath much of the Andes, oceanic lithosphere descends eastward into the mantle at an angle of about 30 degrees (ref. 1). A partially molten region is thought to form in a wedge between this descending slab and the overlying continental lithosphere as volatiles given off by the slab lower the melting temperature of mantle material. This wedge is the ultimate source for magma erupted at the active volcanoes that characterize the Andean margin. But between 28 degrees and 33 degrees S the subducted Nazca plate appears to be anomalously buoyant, as it levels out at about 100 km depth and extends nearly horizontally under the continent. Above this 'flat slab', volcanic activity in the main Andean Cordillera terminated about 9 million years ago as the flattening slab presumably squeezed out the mantle wedge. But it is unknown where slab volatiles go once this happens, and why the flat slab finally rolls over to descend steeply into the mantle 600 km further eastward. Here we present results from a magnetotelluric profile in central Argentina, from which we infer enhanced electrical conductivity along the eastern side of the plunging slab, indicative of the presence of partial melt. This conductivity structure may imply that partial melting occurs to at least 250 km and perhaps to more than 400 km depth, or that melt is supplied from the 410 km discontinuity, consistent with the transition-zone 'water-filter' model of Bercovici and Karato.

  16. 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.

  17. 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

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    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.

  18. 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.

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

    Science.gov (United States)

    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.

  20. Principales criaderos para Aedes aegypti y culícidos asociados, Argentina Main breeding-containers for Aedes aegypti and associated culicids, Argentina

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    Marina Stein

    2002-10-01

    Full Text Available Se identificaron criaderos de Aedes (Stegomyia aegypti en dos ciudades de la provincia del Chaco (Noreste de Argentina: Presidencia Roque Saenz Peña y Machagai. Los recipientes encontrados en los patios de las viviendas capaces de colectar agua se clasificaron según tipo y tamaño, se contaron y examinaron. Aedes aegypti y Culex quinquefasciatus fueron las especies mas abundantes, encontrándose además Cx. maxi, Cx. saltanensis y Ochlerotatus scapularis. Los neumáticos y cajas de baterías para autos fueron los recipientes que más aportaron a la producción de formas inmaduras de los culícidos colectados. Las lluvias fueron un factor importante para la proliferacion de Ae. aegypti, así como también el habito comun en la población de guardar recipientes en sus casas que permitan el desarrollo de estos culícidos.Breeding containers for Aedes (Stegomyia aegypti were identified in two cities of Chaco Province (northeast Argentina: Presidencia Roque Saenz Peña and Machagai. All water-retaining recipients found in house backyards capable to retain water were classified according to their type and size, counted and checked. Aedes aegypti and Culex quinquefasciatus were the most frequently collected species, being also found Cx. maxi, Cx. saltanensis and Ochlerotatus scapularis. Tires and car batteries represented the most important type of container where immature forms of culicids could be found. Rain was an important factor for Ae. aegypti proliferation, as well as the widespread habit of the population of keeping useless containers at home, which allows the development of culicids.

  1. 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.

  2. Hospital-acquired infections associated with poor air quality in air-conditioned environments

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    Daniela Pinheiro da Silva

    2014-04-01

    Full Text Available Backgound and Objectives: Individuals living in cities increasingly spend more time indoors in air-conditioned environments. Air conditioner contamination can be caused by the presence of aerosols from the external or internal environment, which may be associated with disease manifestations in patients present in this type of environment. Therefore, the aim of this review was to assess the air quality in air-conditioned hospital environments as a risk factor for hospital-acquired infections – HAI – as the air can be a potential source of infection, as well as assess the exposure of professionals and patients to different pollutants. Material and Methods: A literature review was performed in the LILACS, MEDLINE, SCIELO, SCIENCE DIRECT databases, CAPES thesis database and Ministry of Health – Brazil, including studies published between 1982 and 2008. The literature search was grouped according to the thematic focus, as follows: ventilation, maintenance and cleaning of systems that comprehend the environmental quality standard. Discussion and Conclusion: Outbreaks of hospital-acquired infections associated with Aspergillus, Acinetobacter, Legionella, and other genera such as Clostridium and Nocardia, which were found in air conditioners, were observed, thus indicating the need for air-conditioning quality control in these environments.

  3. Inverse association between air pressure and rheumatoid arthritis synovitis.

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    Chikashi Terao

    Full Text Available Rheumatoid arthritis (RA is a bone destructive autoimmune disease. Many patients with RA recognize fluctuations of their joint synovitis according to changes of air pressure, but the correlations between them have never been addressed in large-scale association studies. To address this point we recruited large-scale assessments of RA activity in a Japanese population, and performed an association analysis. Here, a total of 23,064 assessments of RA activity from 2,131 patients were obtained from the KURAMA (Kyoto University Rheumatoid Arthritis Management Alliance database. Detailed correlations between air pressure and joint swelling or tenderness were analyzed separately for each of the 326 patients with more than 20 assessments to regulate intra-patient correlations. Association studies were also performed for seven consecutive days to identify the strongest correlations. Standardized multiple linear regression analysis was performed to evaluate independent influences from other meteorological factors. As a result, components of composite measures for RA disease activity revealed suggestive negative associations with air pressure. The 326 patients displayed significant negative mean correlations between air pressure and swellings or the sum of swellings and tenderness (p = 0.00068 and 0.00011, respectively. Among the seven consecutive days, the most significant mean negative correlations were observed for air pressure three days before evaluations of RA synovitis (p = 1.7 × 10(-7, 0.00027, and 8.3 × 10(-8, for swellings, tenderness and the sum of them, respectively. Standardized multiple linear regression analysis revealed these associations were independent from humidity and temperature. Our findings suggest that air pressure is inversely associated with synovitis in patients with RA.

  4. 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

    Directory of Open Access Journals (Sweden)

    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

  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. Implications of Electrical Conductivity Structure Associated With the Nazca Slab Beneath Argentina

    Science.gov (United States)

    Booker, J. R.; Pomposiello, C.; Favetto, A.; Burd, A.

    2005-12-01

    From 1998 to 2005 we have collected more than 100 magnetotelluric (MT) sites in the Sierras Pampeanas of Argentina between 27°S and 33°S. The main targets of these investigations were initially active structures within this thick-skinned tectonics province. However, it became clear as we progressed that the subducted Nazca slab, which is anonymously flat under this area was generating observable electrical structures at mantle depth. The high resistivity of the crystalline crust and the generally thin, but conductive sedimentary cover of much of this area provide a favorable situation for the penetration of electromagnetic energy deep into the mantle. Our longest profile extends from near Chile to near Uruguay at 31.5°S, where the flat slab is widest. The flattest portion of the slab is both electrically conductive and seismically active. This seismic activity terminates eastward at almost the same place that the slab conductor ends and the overlying lithosphere becomes seismically active and electrically conductive. A unifying explanation is that as the slab descends to its flat portion at 100 km it dehydrates. The free water raises pore pressure and triggers earthquakes. As the slab progresses eastward, the fluids leak upward out of the slab into the lithosphere, the slab pore pressure drops, electrical pathways close and the slab becomes resistive and quiet. An intriguing possibility is that the wet lithosphere created in this process sets the stage for a massive volcanic flare-up if the slab dip increases and an asthenospheric wedge reforms. Further east, the slab plunges nearly vertically into the mantle when it meets the electrically resistive and presumably mechanically strong backstop of the root of the Rio de la Plata Craton. A near vertical conductor is found between the plunging slab and the resistive root. This conductor rises to the base of the lithosphere, but does not penetrate. It is almost certainly due to partial melt, but whether this melting

  7. [Cancer and its association with dietary patterns in Córdoba (Argentina)].

    Science.gov (United States)

    Pou, Sonia Alejandra; Niclis, Camila; Aballay, Laura Rosana; Tumas, Natalia; Román, María Dolores; Muñoz, Sonia Edith; Coquet, Julia Becaria; Díaz, María del Pilar

    2014-03-01

    Introducción: La alimentación es un importante factor vinculado a la ocurrencia del cáncer. Su abordaje en términos de patrones alimentarios es de creciente interés en epidemiología nutricional, no obstante ha sido pocas veces empleado en Latinoamérica. Objetivos: Identificar patrones alimentarios en la población adulta de Córdoba (Argentina) y estimar sus efectos sobre el riesgo de ocurrencia de cáncer colorrectal (CCR), cáncer de mama (CM), cáncer de próstata (CP) y urotelial (CU). Métodos: Se condujeron estudios caso-control, 2006-2012, correspondientes a CCR, CM, CP y CU. Empleando un análisis factorial de componentes principales se identificaron patrones alimentarios. Se estimaron ORs mediante regresión logística multinivel. Resultados: Se identificaron patrones característicos en la población general, y en hombres y mujeres independientemente. En población total, los patrones Cono Sur y Bebidas Azucaradas evidenciaron un efecto promotor para CCR y CU, y el Patrón Prudente mostró efecto protector. En mujeres, el CM se asoció de manera directa con los patrones Cono Sur Femenino, Rural y Amiláceo, e inversa con el Patrón Prudente. En hombres, los Patrones Cono Sur Masculino, Bebidas Azucaradas y Típico Mesurado mostraron un efecto promotor para CP. Conclusión: Resulta necesario promover una ingesta habitual de vegetales, frutas y lácteos (éstos últimos de manera moderada en hombres), y disminuir el consumo de carnes rojas (fundamentalmente grasas), carnes procesadas, vegetales amiláceos, vino y bebidas azucaradas, a fin de prevenir la ocurrencia de cáncer. En hombres se sugiere moderar la ingesta de huevos, y en mujeres la de granos refinados, productos de pastelería, aceites y mayonesa.

  8. Association of CAPN1 and CAST gene polymorphisms with meat tenderness in Bos taurus beef cattle from Argentina

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    Pablo Corva

    2007-01-01

    Full Text Available The activity of the calpains/calpastatin proteolytic system is closely related to the postmortem tenderization of meat. We investigated the association between beef tenderness and single nucleotide polymorphism (SNP markers on the CAPN1 gene (SNP316, alleles C/G; SNP530 alleles A/G and the CAST gene 3' untranslated region (SNP2870, alleles A/G. We sampled nine slaughter groups comprising 313 steers which had been reared in beef production systems in Argentina between 2002 and 2004 from crosses between Angus, Hereford and Limousin cattle. Minor allele frequencies for the markers were 0.27 to 0.46 (C, 0.02 to 0.18 (A, and 0.24 to 0.53 (A, respectively. The presence of CAPN1 markers had significant effects on meat shear force but no detectable effects were demonstrated for the CAST marker. The shear force of meat from steers with the SNP316 CC genotype was 11% lower than for the SNP316 CG genotype and 17% lower than for the SNP316 GG genotype. There were very few steers with the SNP530 AA genotype and, contrary to previous studies, meat from steers with the SNP530 GG genotype showed an 11.5% higher shear force than that from steers with the SNP530 GA genotype. Final body weight, carcass weight and rib eye area were not affected by any of the markers. These results support the concept that CAPN1 variants are associated with tenderness across a wide range of beef production systems.

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

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    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.

  10. 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.

  11. 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

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

    Science.gov (United States)

    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

  13. 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

  14. 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

  15. 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

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

    Directory of Open Access Journals (Sweden)

    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.

  17. 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)

  18. 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.

  19. Fasciola hepatica infection and association with gastrointestinal parasites in Creole goats from western Argentina Fasciola hepatica infecção e associação com parasitas gastrintestinais em caprinos crioulos do oeste da Argentina

    Directory of Open Access Journals (Sweden)

    Pablo Cuervo

    2013-08-01

    Full Text Available Goats, called “the cow of the poor”, are the livestock species with the most significant population growth worldwide in recent years. Gastrointestinal parasitism constitutes one of the main constraints to its outdoor and extensive breeding in temperate and tropical countries. Despite a Creole goat population of nearly 4 million heads, local reports on parasitological prevalence are scarce, and while Fasciola hepatica infection is spread all over Argentina, the goat is usually neglected as a reservoir and economic losses are not considered. To evaluate gastrointestinal parasitism prevalence and associations between parasite genera and species, with emphasis on fascioliasis, Creole goats from the plateau and Andean regions from western Argentina were investigated by coprological techniques, and associations were statistically assessed. Eighty-five percent (85% of the animals harbored one or more parasite types, while 46% showed mixed infections. Significant positive associations between F. hepatica + Strongyle eggs, Eimeria sp. + Nematodirus sp. and Nematodirus sp. + Trichuris ovis were detected. Further studies are required to define the causality of these associations and their relevance in epidemiology. F. hepatica is rarely considered as goat parasite in the country, but a 33% prevalence poses an interrogation on the role goats play on the transmission and dissemination of this zoonotic trematode.As cabras, nomeadas como “a vaca dos pobres”, são as espécies de gado com o crescimento populacional mais significativo nos últimos anos em todo o mundo. O parasitismo gastrintestinal constitui uma das principais limitações à sua criação extensiva em clima temperado e tropical. Na Argentina, apesar de uma população de caprinos crioulos de cerca de quatro milhões de cabeças, são escassos os relatórios locais de prevalências parasitológicas. Embora a infecção por Fasciola hepatica esteja espalhada em todo o país, as cabras s

  20. Disinfectant-resistant bacteria in Buenos Aires city hospital wastewater Resistência bacteriana a desinfetantes em efluentes de um hospital em Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    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

  1. 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

    Directory of Open Access Journals (Sweden)

    Susana Goldberg

    2004-12-01

    Full Text Available En este trabajo se propone un índice climático para estimar el riesgo de ocurrencia de erosión eólica basado en las leyes físicas que cuantifican el efecto de la agresión del medio (turbulencia atmosférica sobre la resistencia del sistema (textura del suelo. Este indicador es obtenido en función de observaciones meteorológicas estándar a partir de un modelo que incluye la alteración del perfil vertical del viento ocasionada por la presencia de partículas de suelo en el aire y es expresado en términos de la probabilidad de que la potencia del viento supere las condiciones umbrales para el comienzo del proceso. Si bien el índice fue obtenido para suelo seco y desnudo, la metodología permite avanzar hacia un modelo de evaluación de riesgo más general, si se determinan previamente los valores de velocidad de fricción umbral que corresponden a distintas condiciones que afectan la resistencia del suelo tales como la humedad del suelo, el contenido de materia orgánica, cobertura y uso de la tierra. Este modelo ha sido utilizado para evaluar la distribución espacial del riesgo de erosión eólica en la Provincia de Buenos Aires, Argentina.This paper proposes a climatic index to estimate the wind erosion risk based upon physical laws that quantify the effect of environment's aggression (atmospheric turbulence on system resistance (soil texture. This index is obtained as a function of standard meteorological observations including the alteration of the wind profile produced by the presence of soil particles in the air and it is expressed in terms of the probability for the wind power to exceed the threshold conditions. Although this index was obtained for dry and bare soil, it may mean an advance towards a more general model for risk evaluation if other factors intervening in soil resistance, such as soil humidity, organic material content, land cover and use are included. This model has been used to evaluate the spatial distribution

  2. 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 ...

  3. 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.

  4. 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.

  5. Association of indoor air pollution with rhinitis symptoms, atopy and nitric oxide levels in exhaled air

    DEFF Research Database (Denmark)

    Hersoug, Lars-Georg; Husemoen, Lise Lotte N; Thomsen, Simon Francis;

    2010-01-01

    Exposure to particulate matter (PM) outdoors can induce airway inflammation and exacerbation of asthma in adults. However, there is limited knowledge about the effects of exposure to indoor PM. The aim of this study was to investigate the association of exposure to indoor sources of PM with rhini...... with rhinitis symptoms, atopy and nitric oxide in exhaled air (FeNO) as a measure of airway inflammation....

  6. 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.

  7. 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.

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

    Directory of Open Access Journals (Sweden)

    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

  9. 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...

  10. [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

  11. 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

  12. Identification of Calderas Associated With The Acidic Jurassic Volcanism of Southern Patagonia, Argentina

    Science.gov (United States)

    Chernicoff, C. J.; Salani, F. M.

    During the Jurassic, the Patagonian region was subject to a predominantly acidic volcanism locally known as the Chon Aike Volcanic Province, related to the breakup of Gondwana. It comprises ignimbrites, breccias and agglomerates, and a minor component of rhyolitic and dacitic lava domes. In the study area (Río Seco region, Santa Cruz Province), the Jurassic volcanics are largely overlain by Neogene and Quaternary sediments. However, the aeromagnetic survey of this region has unravelled the magnetic pattern of the volcanics, notably two conspicuous calderas, since the young cover sediments are non-magnetic. The magnetic susceptibility of the volcanic rocks ranges 50 to 80 x 10-5 S.I., as oppossed to the nearly null values of the overlying sediments. The geological interpretation of the aeromagnetic survey is mostly based on the analytic signal of the total magnetic intensity, where two distinct sub-circular magnetic lineaments have been recognized and regarded as calderic structures. The eastern caldera, 30 km wide, is centered at 48º 52' S.L./ 68º 02' W.L., and the western caldera, 23 km wide, is centered at 48º 53' S.L. / 68º 29' W.L.. In addition, a number of smaller, high gradient magnetic anomalies have been identified and interpreted as intra- and extracaldera domes. In the eastern caldera, a number of domes follow an anular pattern of fractures regarded as the boundary of an older, outer caldera. A magnetic circular lineament located within the latter structure has been interpreted as a younger, inner caldera which presents a number of small domes in its central depression; additional domes are also located in between the two calderic structures. The western caldera is less complex since it comprises a single structure with intra-caldera domes. The total magnetic gradient (analytic signal) associated with the domes is one order of magnitude higher (0.1 to 0.2) than the mean value of the region (0.03). In addition to the anular fractures and domes, a

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

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    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.

  14. 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

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

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    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.

  16. 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)

  17. Cincuentenario de la Asociación Argentina de Dermatología: (1907-1957 Fiftieth anniversary of the Argentine Association of Dermatology: (1907-1957

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    J. L. Iribas

    2007-09-01

    Full Text Available Transcurrimos en el año del Centenario de la Asociación Argentina de Dermatología, con la intención de comprender cabalmente ese momento. Hallamos en su historia hechos trascendentes, que nos muestran el camino recorrido y nos orientan hacia la concreción de objetivos, en pro del engrandecimiento de la entidad como tal. La revisión del Cincuentenario Institucional, a través de la lectura del acto oficial y evento científico, que se acompañó con la presencia de un número importante de médicos, representativo de la Medicina y Dermatología Argentina, nos nutre de información, estimula a la revisión histórica e invita a trabajar por la vigencia y consolidación del patrimonio cultural-educativo de nuestro país con proyección internacional, que concentra la Asociación Argentina de Dermatología.We go through the year of the Anniversary of the Argentine Association of Dermatology with the intention of fully understanding this moment. Therefore, we have looked for important facts in its history, which show us the distance covered and guide us through the realization of goals, which exalt the institution as such. Through the reading of the first official ceremony and the scientific event which accompanied it -which was full of several important physicians representing Argentine foreign Medicine and Dermatology-, the review of the Fiftieth Institutional Anniversary nurtures us with information and stimulates us to work for the validity and consolidation of the educational and cultural heritage of our country that constitutes the Argentine Association of Dermatology.

  18. 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

  19. 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

  20. 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.

  1. 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

  2. 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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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

  5. 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

    Directory of Open Access Journals (Sweden)

    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

  6. 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

  7. Levels of glyphosate in surface waters, sediments and soils associated with direct sowing soybean cultivation in north pampasic region of Argentina.

    Science.gov (United States)

    Peruzzo, Pablo J; Porta, Atilio A; Ronco, Alicia E

    2008-11-01

    Levels of glyphosate were determined in water, soil and sediment samples from a transgenic soybean cultivation area located near to tributaries streams of the Pergamino-Arrecifes system in the north of the Province of Buenos Aires, Argentina. Field work took into account both the pesticide application and the rains occurring after applications. The pesticide was analysed by HPLC-UV detection, previous derivatization with 9-fluorenylmethylchloroformate (FMOC-Cl). In addition, SoilFug multimedia model was used to analyse the environmental distribution of the pesticides. In the field, levels of glyphosate in waters ranged from 0.10 to 0.70 mg/L, while in sediments and soils values were between 0.5 and 5.0 mg/Kg. Temporal variation of glyphosate levels depended directly on the time of application and the rain events. The results obtained from the application of the model are in accordance with the values found in the field.

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

    Directory of Open Access Journals (Sweden)

    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

  9. 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

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

    Science.gov (United States)

    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.

  11. 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 ...

  12. Acción social y nuevo Estado liberal en Argentina: La participación de las mujeres en las instituciones del modelo mixto de atención de necesidades en el centro y sur bonaerenses Social Action and the New Liberal State in Argentina: Women's Participation in Institutions based on the Mixed Model for Meeting Needs in the Center and South of Buenos Aires

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    Yolanda de Paz Trueba

    2011-08-01

    Full Text Available A fines del siglo XIX y en el marco de la consolidación del poder político en Argentina, encontramos una serie de vacíos que el Estado iba dejando, mismos que fueron ocupados por el accionar de asociaciones emanadas de la sociedad civil, en las que mujeres de los pueblos abordados en este trabajo adquirieron una presencia destacada. En el presente artículo buscamos analizar las relaciones entre ese Estado en formación y las instituciones locales destinadas a la atención de la salud y la educación, en comunidades del centro y sur bonaerenses, espacios no estudiados hasta el momento en esta clave, en el tránsito hacia el siglo XX cuando se resignificaron las funciones e importancia de organizaciones tradicionales como las abocadas a la práctica de la beneficencia, muchas de ellas de fuerte impronta católica.In the late 19th century and as part of the consolidation of political power in Argentina, we find a series of gaps left by the state, which were filled by the work of associations that emerged from civil society, in which the village women studied in this article acquired a noticeable presence. This article seeks to analyze relations between that nascent state and local institutions designed to provide health care and education in communities in the center and south of Buenos Aires. These spheres have not been studied in this sense to date, in the shift towards the 19th century when the functions and importance of traditional organizations such as charity organizations, many of which have a strong Catholic influence, were resignified.

  13. 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.

  14. 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.

  15. 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

  16. Continental sedimentary successions exposed in Centinela del Mar, Buenos Aires, Argentina (Lower Pleistocene - Holocene); Las sucesiones sedimentarias continentales expuestas en Centinela del Mar, provincia de Buenos Aires, Argentina (Pleistoceno Inferior-Holoceno)

    Energy Technology Data Exchange (ETDEWEB)

    Cenizo, M. M.

    2011-07-01

    In the present paper, the geomorphologic and sedimentary characteristics of the continental sequences exposed on the coastal cliffs and surrounding areas of the Centinela del Mar locality are described and interpreted. Fourteen lithofacies are defined, their relation, geometry and structure are represented using transversal and longitudinal detailed profiles. In the basal and medium sector of the profile, facies of different degrees of transport and aqueous rework were recognized. In the superior sector, a succession of marine peri-coastal facies corresponding to the Belgranense transgression (=Fm. Pascua) were identified, ending the sequence with relictual eolic facies. The different historical interpretations are discussed, homologating the units referred previously with the ones proposed on this paper. These units are correlated with those defined in the allostratigrapic scheme proposed by other authors for the area covered between Playa San Carlos and Arroyo Chapadmalal. This allowed recognize for the area under study the presence of the Punta San Andres and Arroyo Loberia Alloformations (basal-medium and superior sector, respectively). Between these two entities, a association of well defined progradant marine facies are found and named on this paper as Centinela del Mar Alloformation. Finally, periferithe information gathered here (magnetostratigraphy, radiometric dating, stratigraphic correlations, etc) indicates, at least preliminarily, that the sequence of Centinela del Mar corresponds to the Ensenadense- Lujanense interval (Lower Pleistocene - Holocene). (Author) 73 refs.

  17. Different immunomodulatory effects associated with sub-micrometer particles in ambient air from rural, urban and industrial areas

    International Nuclear Information System (INIS)

    Immunomodulatory effects of chemicals adsorbed to particles with aerodynamic diameter below 0.49 μm (PM0.5) collected in winter 2001 at three sampling points (industrial area [LPIn], traffic-influenced urban area [LPCi], and control area [LPCo]) of La Plata, Argentina, were investigated. The sampling of particulate matter was carried out with high-volume collectors using cascade impactors. PM0.5-adsorbed compounds were hexane-extracted by accelerated solvent extraction. For immunological investigations, human peripheral blood lymphocytes were activated by phytohemagglutinin and exposed to dimethyl-sulfoxide dilutions of PM0.5-extracts for 24 h. Vitality/proliferation was quantified using MTT, released interferon-γ (IFN-γ) and interleukin-4 (IL-4) by ELISA. Cytokine production but not vitality/proliferation was significantly suppressed by all of the highest extract concentrations. Generally, suppression of IFN-γ by PM0.5-extracts was stronger than those of IL-4. Based on administered mass of PM0.5, all extracts suppressed IFN-γ production nearly uniform. Contrary, LPCi-extracts exerted maximum IFN-γ suppression based either on air volume or regarding PM0.5-adsorbed PAH. Also the ranking of PM0.5-associated effects on IL-4 production differs in dependence of the chosen reference points, either mass or [μg/ml] or air volume [m3/ml] related dust quantities in cell culture. Based on the corresponding air volume, LPCi-extracts inhibited IL-4 production to the maximum extend, whereas suppression of IL-4 was comparable based on concentrations. This indicates that not only the disparate PM0.5-masses in air cause varying impacts, but also that disparities in PM0.5-adsorbed chemicals provoke different effects on immune responses and shifts in the regulatory balance that might have implications for allergy and cancer development

  18. 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.

  19. HIPEROSTOSIS ESQUELÉTICA DIFUSA IDIOPÁTICA EN UNA COLECCIÓN OSTEOLÓGICA CONTEMPORÁNEA (LA PLATA, BUENOS AIRES, ARGENTINA / Difusse Idiopathic Skeletal Hyperostosis in a contemporary osteological collection (La Plata, Buenos Aires, Argentina

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    Marcos Plischuk

    2015-06-01

    Full Text Available La Hiperostosis Esquelética Difusa Idiopática (DISH es una enfermedad caracterizada por provocar anquilosis entre cuerpos vertebrales, sumada a la osificación masiva de ligamentos y tendones en el resto del sistema esqueletal. El objetivo del presente trabajo es establecer la prevalencia de DISH en una colección osteológica documentada contemporánea y discutir rasgos patognomónicos y factores de riesgo asociados. A fin de establecer un diagnóstico se relevó, en 100 individuos adultos, la formación de bloques óseos de al menos tres vertebras fusionadas por la osificación de ligamento vertebral anterior. Se consideró además que no estuvieran comprometidos los espacios intervertebrales y la articulación sacroilíaca. En la zona extra espinal se registraron como evidencia complementaria la presencia de entesopatías. Como resultado del análisis se observaron seis individuos con DISH, sin diferencias significativas entre ambos sexos. El segmento vertebral principalmente afectado fue el torácico, los espacios intervertebrales no se vieron comprometidos en ningún caso y la articulación sacroilíaca tampoco presentó señales de osificación patológica; a la vez que se relevaron numerosas entesopatías. Las prevalencias observadas se deberían a la avanzada edad de los individuos analizados y las características nutricionales de la población de referencia.  Abstract  The diffuse idiopathic skeletal hyperostosis (DISH is a disease characterized by vertebral ankylosis, with massive ligaments and tendons ossification in the rest of the skeletal system. The aim of this study is to establish the prevalence of DISH in a well-documented and contemporary osteological collection, and to discuss pathognomonic features and associated risk factors. In order to establish the diagnosis, we registered, in 100 adults, the formation of bone blocks, with at least three fused vertebrae by ossification of the anterior vertebral ligament. It was

  20. A cluster of human T-cell lymphotropic virus type I-associated myelopathy/tropical spastic paraparesis in Jujuy, Argentina.

    Science.gov (United States)

    Biglione, Mirna M; Pizarro, Manuel; Puca, Alberto; Salomón, Horacio E; Berría, Maria I

    2003-04-01

    Compared with other regions in Argentina, greater human T-cell lymphotropic virus type I (HTLV-I) seroprevalence has been reported in Jujuy Province, where it reaches 2.32% in the general population, so that a search for HTLV-I-associated myelopathy/tropical spastic paraparesis (HAM/TSP) cases deserved to be carried out. Accordingly, a clinically diagnosed and serologically confirmed cluster of cases in 1 man and 10 women, including 2 sisters, is described here. Most patients (9/11) were born in Cochinoca Department, located in an Andes highland area called Puna Jujeña, situated at more that 3400 m above sea level. No history of risk factors was disclosed, except for a single transfusion in 1 patient. In contrast to the Andean region of Bolivia, where high HTLV-I seroprevalence is in part attributable to Japanese immigrants, the Jujuy population mainly consists of aborigines, mestizos, and European descendants. Therefore, the long-term presence of virus in Jujuy natives may be taken for granted. Considering the HAM/TSP cluster described here plus previously reported isolated cases in neighboring Salta Province, we speculate that the Puna Jujeña region and regions in that vicinity would be a microepidemic focus of disease. To determine the role of possible pathogenic cofactors such as geographic, ethnic, genetic, and cultural features, further pertinent surveys are required in subtropical northwestern Argentina.

  1. 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

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    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

  2. 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.

  3. AIR LEAK SYNDROME AND A RARE CASES PRESENTATION OF PNEUMOPERICARDIUM ASSOCIATED WITH AIR EMBOLISM IN TTN BABY

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    Dinakara

    2014-04-01

    Full Text Available : Air leak syndromes are a group of clinically recognizable disorders produced by alveolar rupture and subsequent escape of air in to the tissue in which air is not normally present. All the clinical types of air leak syndrome originate in over distended alveoli, which ultimately rupture. Over distention is because of spontaneous vigorous respirations (usually larger term babies at birth, increased pressure of mechanical ventilator (PEEP, PIP vigorous Cardio Pulmonary resuscitation, air trapping in the presence of a ball valve mechanism, most of this air leaks occur spontaneously, but incidence increases with ventilator support, in some cases of collagen vascular diseases and associated renal problems.1 But in our study spontaneous pneumopericardium with air embolism a rare presentation and spontaneously recovered and followed up to one year. Timely radiological investigations including x-rays, USG chest, and ultra sound guided drainage of pneumopericardium with help of radiologist, play an important role in the management preventing morbidity and mortality.

  4. Las sucesiones sedimentarias continentales expuestas en Centinela del Mar, provincia de Buenos Aires, Argentina (Pleistoceno Inferior-Holoceno

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    Cenizo, Marcos M.

    2011-06-01

    Full Text Available In the present paper, the geomorphological and sedimentary characteristics of the continental sequences exposed on the coastal cliffs and surrounding areas of the Centinela del Mar locality are described and interpreted. Fourteen lithofacies are defined, their relation, geometry and structure are represented using transversal and longitudinal detailed profiles. In the basal and medium sector of the profile, facies of different degrees of transport and aqueous rework were recognized. In the superior sector, a succession of marine peri-coastal facies corresponding to the «Belgranense» transgression (=Fm. Pascua were identified, ending the secuence with relictual eolic facies. The different historical interpretations are discussed, homologating the units referred previously with the ones proposed on this paper. These units are correlated with those defined in the allostratigrapic scheme proposed by other authors for the area covered between Playa San Carlos and Arroyo Chapadmalal. This allowed recognize for the area under study the presence of the Punta San Andrés and Arroyo Lobería Alloformations (basal-medium and superior sector, respectively. Between these two entities, a association of well defined progradant marine facies are found and named on this paper as Centinela del Mar Alloformation. Finally, the information gathered here (magnetostratigraphy, radiometric dating, stratigraphic correlations, etc indicates, at least preliminarily, that the secuence of Centinela del Mar corresponds to the Ensenadense-Lujanense interval (Lower Pleistocene - Holocene.

    Son descriptas e interpretadas las características geomorfológicas y sedimentarias de las sucesiones continentales expuestas en los acantilados litorales y sectores aledaños de la localidad Centinela del Mar. Se definen catorce litofacies, cuyas relaciones, geometría y estructuras son representadas mediante perfiles transversales y longitudinales de detalle. En el sector basal y

  5. 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

  6. First record of Eudorylas schreiteri (Shannon) (Diptera: Pipunculidae) as a parasitoid of the corn leafhopper (Hemiptera: Cicadellidae) in Argentina, with a table of pipunculid-host associations in the neo tropical region

    Energy Technology Data Exchange (ETDEWEB)

    Virla, Eduardo G. [PROIMI-Biotecnologia, Tucuman (Argentina). Div. de Control Biologico]. E-mail: evirla@hotmail.com; Moya-Raygoza, Gustavo [Universidad de Guadalajara, Jalisco (Mexico). Centro Universitario de Ciencias Biologicas y Agropecuarias (CUCBA)]. E-mail: gmoya@cucba.udg.mx; Rafael, Jose A. [Instituto Nacional de Pesquisas da Amazonia (INPA), Manaus, AM (Brazil)]. E-mail: jarafael@inpa.gov.br

    2009-01-15

    The big-headed fly Eudorylas schreiteri (Shannon) is recorded for the first time as an endoparasitoid of the corn leafhopper Dalbulus maidis (DeLong and Wolcott) in Northern Argentina. A table of known Neotropical pipunculid-host associations is presented. (author)

  7. Association of Ambient Air Quality with Pulmonary Function of Youngster Footballers

    OpenAIRE

    Das, Paulomi; Chatterjee, Pinaki

    2013-01-01

    Purpose Air pollution has remained a major health concern in Kolkata. The present study was carried out to analyze the association between the levels of air pollutants and pulmonary function of youngster footballers living in two different air pollutant zones of Kolkata, West Bengal. Methods Air pollution data of the two ambient air quality-monitoring stations located at Rabindrabharati and Victoria Memorial was collected for the period from January 2012 to March 2012. Study was conducted on ...

  8. Patagonia Argentina

    Directory of Open Access Journals (Sweden)

    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.

  9. Reducing indoor air pollution by air conditioning is associated with improvements in cardiovascular health among the general population.

    Science.gov (United States)

    Lin, Lian-Yu; Chuang, Hsiao-Chi; Liu, I-Jung; Chen, Hua-Wei; Chuang, Kai-Jen

    2013-10-01

    Indoor air pollution is associated with cardiovascular effects, however, little is known about the effects of improving indoor air quality on cardiovascular health. The aim of this study was to explore whether improving indoor air quality through air conditioning can improve cardiovascular health in human subjects. We recruited a panel of 300 healthy subjects from Taipei, aged 20 and over, to participate in six home visits each, to measure a variety of cardiovascular endpoints, including high sensitivity-C-reactive protein (hs-CRP), 8-hydroxy-2'-deoxyguanosine (8-OHdG), fibrinogen in plasma and heart rate variability (HRV). Indoor particles and total volatile organic compounds (VOCs) were measured simultaneously at the participant's home during each visit. Three exposure conditions were investigated in this study: participants were requested to keep their windows open during the first two visits, close their windows during the next two visits, and close the windows and turn on their air conditioners during the last two visits. We used linear mixed-effects models to associate the cardiovascular endpoints with individual indoor air pollutants. The results showed that increases in hs-CRP, 8-OHdG and fibrinogen, and decreases in HRV indices were associated with increased levels of indoor particles and total VOCs in single-pollutant and two-pollutant models. The effects of indoor particles and total VOCs on cardiovascular endpoints were greatest during visits with the windows open. During visits with the air conditioners turned on, no significant changes in cardiovascular endpoints were observed. In conclusion, indoor air pollution is associated with inflammation, oxidative stress, blood coagulation and autonomic dysfunction. Reductions in indoor air pollution and subsequent improvements in cardiovascular health can be achieved by closing windows and turning on air conditioners at home.

  10. Gastropods Associated with Fossil Traces from Yacoraite Formation (Maastrichtian-Danian), and its Paleoenvironmental Significance, Jujuy,Northwestern Argentina

    Institute of Scientific and Technical Information of China (English)

    Carlos A. C(O)NSOLE GONELLA; Miguel GRIFFIN; Florencio G. ACE(N)OLAZA

    2009-01-01

    We present results tending to characterize the new records of invertebrates from the Yacoraite Formation (Maastrichtian-Danian). The fossils reported come from two stratigraphic sections exposed in the surroundings of Maimara and Jueya, province of Jujuy, northwestern Argentina. The selection was based on geological and paleontological evidence. The recovered fossils include gastropods and invertebrate fossil traces, including Planolites, Skolithos and Gastrochanoelites ichnogenns. As result of our review, we discussed the possibility of assigning the analyzed gastropods to the family Zygopleuridae (gene. et. sp. indet.), as an approximation to the taxonomic resolution of this fossil fauna. The trace fossils were assigned to the archetypical Glossifungites ichnofacies. The study of the fossil assemblage allowed us to defme a shallow depositional environment, characteristic of a marine context with high-energy conditions.

  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. 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

    Directory of Open Access Journals (Sweden)

    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

  13. 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.

  14. 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

  15. 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.

  16. Environmental Variables Associated with Hantavirus Reservoirs and Other Small Rodent Species in Two National Parks in the Paraná Delta, Argentina: Implications for Disease Prevention.

    Science.gov (United States)

    Vadell, María Victoria; Gómez Villafañe, Isabel Elisa

    2016-06-01

    Hantavirus pulmonary syndrome (HPS) is a severe zoonotic disease caused by hantaviruses hosted in various rodents species. In Argentina, its transmission to humans has been associated to exposure during activities such as farming, recreation, and tourism which are carried out in wild and rural areas. The aim of this study was to analyze the macro- and micro-habitat use and spatio-temporal variation of small sylvan rodents in Pre Delta and Islas de Santa Fe national parks, located in an HPS-endemic area of Argentina. Rodent communities were studied at six sites: two islands, a riparian forest, an inland forest, a marsh, and the margins of a pond. A total of 453 individuals of five species were captured with a trapping effort of 9471 trap-nights. Maximum species richness was found at the marsh and the pond margin sites. Abundance of rodents was influenced by flooding events. Two hantavirus reservoirs, Oligoryzomys flavescens and Akodon azarae, were identified in the area. O. flavescens was captured in every habitat, but it was dominant in Islas de Santa Fe National Park where its abundance was strongly influenced by flooding. A. azarae was captured in every habitat except on the islands. A. azarae behaved as a generalist species at a micro-habitat scale in every habitat of Pre Delta National Park except for the marsh where it selected patches with low vegetation height. Based on these results, several disease prevention measures, including the use of rodent-proof containers for food, and keeping the grass short in the camp site, are proposed in order to reduce the risk to visitors and residents of contracting HPS. PMID:27169561

  17. PARTICLES ASSOCIATION STUDY OF A BORATE SAMPLE FROM SIJES DISTRICT, ARGENTINA ESTUDIO DE LA ASOCIACIÓN DE PARTÍCULAS DE UNA MUESTRA DE BORATOS DEL DISTRITO SIJES, ARGENTINA

    Directory of Open Access Journals (Sweden)

    Rosa M Torres Sánchez

    2007-04-01

    Full Text Available The increasing range of borate uses, mainly in the ceramic frit market, led borate producers to improve competitiveness through concentration and/or purification steps in the mill circuit as well as in the characterization of high content B2O3 minerals. Minerals coming from Sijes, Salta Province, Argentina, mainly identified as colemanite and hydroboracite, with 50.84 % and 50.54 % B2O3 respectively, are potentially interesting from an industrial point of view. The desliming purification technique in hydrocyclones used to upgrade B2O3 and downgrade undesirable impurities to the borate market (Rietveld method mainly iron oxides, chlorides and sulphates not only eliminates slimes but it also generates pores, through a decrease of the specific surface of the particles. Two samples under different purification steps were analyzed: deslimed and without desliming. The chemical and mineralogical analyses of both samples indicate a decreasing percentage of colemanite, smectite and illite in the deslimed sample with a small increase of hibroracite. The parameters of surface electric charge (PZC and IEP match the observations made with the electronic microscopy, reveal mineral associations only in the sample without desliming.La ampliación de los mercados que utilizan borato, principalmente el de la producción de fritas cerámicas, ha llevado a los productores de dicho mineral a mejorar su competitividad a través de su concentración y/o purificación tanto por medio de su molienda así como mediante la caracterización de minerales con alto contenido en B2O3. En los minerales provenientes de Sijes, Provincia de Salta, Argentina, se han identificado principalmente colemanita e hidroboracita, con 50.84% y 50.54% en B2O3, respectivamente, lo cual los hace potencialmente interesantes para su utilización industrial. La técnica de purificación por deslamado en hidrociclón para purificar B2O3, permite la disminución de impurezas indeseables para la

  18. Ecología urbana de Triatoma infestans en Argentina: asociación entre Triatoma infestans y palomares Triatoma infestans urban ecology in Argentina: association between Triatoma infestans and pigeon cotes

    Directory of Open Access Journals (Sweden)

    Silvana L. Vallvé

    1995-06-01

    tinha coletado o T. infestans. O perfil alimentar dos triatomas mostra predomínio de sangue de aves; nos edifícios e na adega 95% dos T. infestans analisados alimentaram-se somente de aves; os demais fizeram repastos simples ou mistos em humanos, cães ou gatos. Nenhum T. infestans apresentou infecção com Trypanosoma cruzi.A study was undertaken in an urban area of the capital city of the province of San Juan, Argentina, in a housing complex of 768 flats distributed in buildings of 3 and 7 floors each surrouding an abandoned central winery. A total of 329 Triatoma infestans were captured, 293 on 4 terraces of seven-floor-towers and 36 inside the winery, associated with the great number of pigeons which nest in those places. The bugs were sheltered in the dung accumulated between the cement blocks used to floor the terraces and inside the unused tuns in the winery. Two main bug foci were identified associated with the dense pigeon colonies: 81,5% of the T. infestans collected were found in one of the towers (4B and 11% in the central winery. After six months of insecticidal sprayind of the infested areas, those terraces in wich T. infestans had not been previously found resulted gave positive results. The feeding profile of triatomines shows a predominance of simple bird blood meals; in the buildings and the winery 95% of the T. infestans analized were identified for bird blood meals; the rest had fed on one or more sources: human, dogs or cats. None of the T. infestans was infected by T. cruzi.

  19. Levels of glyphosate in surface waters, sediments and soils associated with direct sowing soybean cultivation in north pampasic region of Argentina

    International Nuclear Information System (INIS)

    Levels of glyphosate were determined in water, soil and sediment samples from a transgenic soybean cultivation area located near to tributaries streams of the Pergamino-Arrecifes system in the north of the Province of Buenos Aires, Argentina. Field work took into account both the pesticide application and the rains occurring after applications. The pesticide was analysed by HPLC-UV detection, previous derivatization with 9-fluorenylmethylchloroformate (FMOC-Cl). In addition, SoilFug multimedia model was used to analyse the environmental distribution of the pesticides. In the field, levels of glyphosate in waters ranged from 0.10 to 0.70 mg/L, while in sediments and soils values were between 0.5 and 5.0 mg/Kg. Temporal variation of glyphosate levels depended directly on the time of application and the rain events. The results obtained from the application of the model are in accordance with the values found in the field. - Glyphosate concentrations in the environment from a region where little information exists about this and intensive cultivation activities predominate in large areas

  20. Levels of glyphosate in surface waters, sediments and soils associated with direct sowing soybean cultivation in north pampasic region of Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Peruzzo, Pablo J. [Grupo Materiales Polimericos, INIFTA - Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas (UNLP-CONICET), Diag. 113 y 64, CC 16 Suc 4, 1900 La Plata (Argentina); Porta, Atilio A. [CIMA - Centro de Investigaciones del Medio Ambiente, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900 La Plata (Argentina); Division Quimica Analitica, Departamento de Quimica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900 La Plata (Argentina)], E-mail: aporta@quimica.unlp.edu.ar; Ronco, Alicia E. [CIMA - Centro de Investigaciones del Medio Ambiente, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 y 115, 1900 La Plata (Argentina)

    2008-11-15

    Levels of glyphosate were determined in water, soil and sediment samples from a transgenic soybean cultivation area located near to tributaries streams of the Pergamino-Arrecifes system in the north of the Province of Buenos Aires, Argentina. Field work took into account both the pesticide application and the rains occurring after applications. The pesticide was analysed by HPLC-UV detection, previous derivatization with 9-fluorenylmethylchloroformate (FMOC-Cl). In addition, SoilFug multimedia model was used to analyse the environmental distribution of the pesticides. In the field, levels of glyphosate in waters ranged from 0.10 to 0.70 mg/L, while in sediments and soils values were between 0.5 and 5.0 mg/Kg. Temporal variation of glyphosate levels depended directly on the time of application and the rain events. The results obtained from the application of the model are in accordance with the values found in the field. - Glyphosate concentrations in the environment from a region where little information exists about this and intensive cultivation activities predominate in large areas.

  1. 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

  2. Análisis de cambios de uso del suelo en la Delegación Municipal de Ingeniero White (Buenos Aires, Argentina: aplicación de geotecnologías

    Directory of Open Access Journals (Sweden)

    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.

  3. 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

  4. 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 ...

  5. 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...

  6. 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...

  7. AIRE-induced apoptosis is associated with nuclear translocation of stress sensor protein GAPDH

    International Nuclear Information System (INIS)

    Highlights: ► AIRE induces apoptosis in epithelial cells. ► CARD domain of AIRE is sufficient for apoptosis induction. ► AIRE induced apoptosis involves GAPDH translocation to the nuclei. ► Deprenyl inhibits AIRE induced apoptosis. -- Abstract: AIRE (Autoimmune Regulator) has a central role in the transcriptional regulation of self-antigens in medullary thymic epithelial cells, which is necessary for negative selection of autoreactive T cells. Recent data have shown that AIRE can also induce apoptosis, which may be linked to cross-presentation of these self-antigens. Here we studied AIRE-induced apoptosis using AIRE over-expression in a thymic epithelial cell line as well as doxycycline-inducible HEK293 cells. We show that the HSR/CARD domain in AIRE together with a nuclear localization signal is sufficient to induce apoptosis. In the nuclei of AIRE-positive cells, we also found an increased accumulation of a glycolytic enzyme, glyceraldehyde-3-phosphate (GAPDH) reflecting cellular stress and apoptosis. Additionally, AIRE-induced apoptosis was inhibited with an anti-apoptotic agent deprenyl that blocks GAPDH nitrosylation and nuclear translocation. We propose that the AIRE-induced apoptosis pathway is associated with GAPDH nuclear translocation and induction of NO-induced cellular stress in AIRE-expressing cells.

  8. AIRE-induced apoptosis is associated with nuclear translocation of stress sensor protein GAPDH

    Energy Technology Data Exchange (ETDEWEB)

    Liiv, Ingrid, E-mail: ingrid.liiv@ut.ee [Molecular Pathology, Institute of General and Molecular Pathology, University of Tartu, Tartu (Estonia); Haljasorg, Uku; Kisand, Kai; Maslovskaja, Julia; Laan, Martti; Peterson, Paert [Molecular Pathology, Institute of General and Molecular Pathology, University of Tartu, Tartu (Estonia)

    2012-06-22

    Highlights: Black-Right-Pointing-Pointer AIRE induces apoptosis in epithelial cells. Black-Right-Pointing-Pointer CARD domain of AIRE is sufficient for apoptosis induction. Black-Right-Pointing-Pointer AIRE induced apoptosis involves GAPDH translocation to the nuclei. Black-Right-Pointing-Pointer Deprenyl inhibits AIRE induced apoptosis. -- Abstract: AIRE (Autoimmune Regulator) has a central role in the transcriptional regulation of self-antigens in medullary thymic epithelial cells, which is necessary for negative selection of autoreactive T cells. Recent data have shown that AIRE can also induce apoptosis, which may be linked to cross-presentation of these self-antigens. Here we studied AIRE-induced apoptosis using AIRE over-expression in a thymic epithelial cell line as well as doxycycline-inducible HEK293 cells. We show that the HSR/CARD domain in AIRE together with a nuclear localization signal is sufficient to induce apoptosis. In the nuclei of AIRE-positive cells, we also found an increased accumulation of a glycolytic enzyme, glyceraldehyde-3-phosphate (GAPDH) reflecting cellular stress and apoptosis. Additionally, AIRE-induced apoptosis was inhibited with an anti-apoptotic agent deprenyl that blocks GAPDH nitrosylation and nuclear translocation. We propose that the AIRE-induced apoptosis pathway is associated with GAPDH nuclear translocation and induction of NO-induced cellular stress in AIRE-expressing cells.

  9. Associations between Parents' Perceived Air Quality in Homes and Health among Children in Nanjing, China.

    Directory of Open Access Journals (Sweden)

    Hua Qian

    Full Text Available The increasing prevalence of respiratory diseases in Chinese children has focused attention on indoor environmental quality. We investigated associations between perceived air quality in domestic environments and children's allergic diseases with a questionnaire survey study. A total of 4017 children aged 1-8 years old from 23 kindergartens in urban, suburban and industrial areas in Nanjing were randomly recruited for this study. Parents' perceived odors, including stuffy odor, unpleasant odor, pungent odor, moldy odor, humid air and dry air were found to be associated with asthma, wheeze, dry cough and rhinitis (P < 0.05. Both perceived dry and humid air were found to be positively associated with dampness indices, and we present evidence that the sensation of dryness may not be due to the actual indoor relative humidity, but rather to indoor air irritants. Parents' perception of odors and relative humidity may be indicators of environment pollutants, which are likely the real factors associated with children's allergic diseases.

  10. Protección social y políticas de promoción del trabajo asociativo y autogestionado en la Argentina (2003-2013: el Programa Argentina Trabaja (Social protection and policies of promotion of associated and self-managed work in Argentina (2003-2013: the Argentina Trabaja Programme

    Directory of Open Access Journals (Sweden)

    Denise Kasparian

    2014-12-01

    Full Text Available El objetivo del artículo es examinar los modos de protección social que instaura el Programa Argentina Trabaja, de modo de aproximarnos al análisis de la calidad del trabajo generado por el Programa. A través de la revisión bibliográfica y el análisis documental, se identificaron aspectos positivos al respecto: la inscripción de los beneficiarios en el monotributo social, la percepción de la Asignación Universal por Hijo, y la conformación de cooperativas como modalidad de trabajo. La masividad del Programa y el monto del ingreso son elementos que potencian los cambios sociales que se proponen desde el diseño. No obstante, existen tensiones y limitaciones: las escasas posibilidades de diseñar e implementar autónomamente las actividades de las cooperativas; la percepción individual de los ingresos, y que los mismos no alcancen el salario mínimo vital y móvil, ni sean actualizados según los estándares del empleo asalariado formal; y los límites que aún acarrea el monotributo social en cuanto al efectivo uso de los beneficios que contempla. Se concluye que el Programa aporta mejorías para los trabajadores provenientes de la informalidad, mientras que, en comparación con la protección social anclada en el empleo formal asalariado, evidencia carencias. | The objective of the paper is to examine the modes of social protection established by the Argentina Trabaja Programme, so as to analyse the quality of the work generated by the Programme. Through bibliographic review and document analysis, positive elements in this regard were identified: the registration of the beneficiaries in the social monotribute, the perception of the universal child income, and the formation of cooperatives as a mode of work. The massiveness of the Programme and the amount of the income are elements that enhance the social changes proposed in the design. However, there are tensions and limitations: the limited possibilities of designing and

  11. 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

  12. Genetic diversity of Fusarium graminearum sensu lato isolates from wheat associated with Fusarium Head Blight in diverse geographic locations of Argentina.

    Science.gov (United States)

    Consolo, Verónica F; Ortega, Leonel M; Salerno, Graciela; Astoreca, Andrea L; Alconada, Teresa M

    2015-01-01

    Fusarium Head Blight is an important wheat disease in the Argentine Pampas region, being Fusarium graminearum the predominant pathogen. DNA polymorphism of the isolates was analyzed by IGS-RFLP and ISSR. IGS-RFLP and ISSR profiling were carried out using six endonucleases and eight primers, respectively. IGS-RFLP yielded 41 bands, 30 of which were polymorphic while ISSR produced 87 bands with 47 polymorphic bands. Both markers showed genetic variability among the analyzed isolates; however, IGS-RFLP was more efficient than ISSR, showing a higher polymorphic average (59.91%) than the latter (44.11%). The averages of polymorphic information content (PIC) were 0.211 and 0.129, respectively. Twenty haplotypes were identified by IGS-RFLP and 15 haplotypes by ISSR. Genotype clustering within dendrograms was different for both types of markers. The genetic groups obtained by IGS-RFLP showed a partial association to geographic origin. This is the first report on genetic variability of F. graminearum isolates from wheat in Argentina using IGS-RFLP and ISSR markers.

  13. Associations between maternal exposure to air pollution and traffic noise and newborn's size at birth

    DEFF Research Database (Denmark)

    Hjortebjerg, Dorrit; Andersen, Anne Marie Nybo; Ketzel, Matthias;

    2016-01-01

    BACKGROUND: Maternal exposure to air pollution and traffic noise has been suggested to impair fetal growth, but studies have reported inconsistent findings. Objective To investigate associations between residential air pollution and traffic noise during pregnancy and newborn's size at birth....... METHODS: From a national birth cohort we identified 75,166 live-born singletons born at term with information on the children's size at birth. Residential address history from conception until birth was collected and air pollution (NO2 and NOx) and road traffic noise was modeled at all addresses...... between air pollution and birth weight. Exposure to residential road traffic noise was weakly associated with reduced head circumference, whereas none of the other newborn's size indicators were associated with noise, neither before nor after adjustment for air pollution. CONCLUSIONS: This study indicates...

  14. Glass science tutorial: Lecture No. 4, commercial glass melting and associated air emission issues

    Energy Technology Data Exchange (ETDEWEB)

    Kruger, A.A.

    1995-01-01

    This document serves as a manual for a workshop on commercial glass melting and associated air emission issues. Areas covered include: An overview of the glass industry; Furnace design and construction practices; Melting furnace operation; Energy input methods and controls; Air legislation and regulations; Soda lime emission mechanisms; and, Post furnace emission controls. Supporting papers are also included.

  15. Glass science tutorial: Lecture No. 4, commercial glass melting and associated air emission issues

    International Nuclear Information System (INIS)

    This document serves as a manual for a workshop on commercial glass melting and associated air emission issues. Areas covered include: An overview of the glass industry; Furnace design and construction practices; Melting furnace operation; Energy input methods and controls; Air legislation and regulations; Soda lime emission mechanisms; and, Post furnace emission controls. Supporting papers are also included

  16. Meta-analysis of air pollution exposure association with allergic sensitization in European birth cohorts

    NARCIS (Netherlands)

    Gruzieva, Olena; Gehring, Ulrike; Aalberse, Rob; Agius, Raymond; Beelen, Rob; Behrendt, Heidrun; Bellander, Tom; Birk, Matthias; de Jongste, Johan C.; Fuertes, Elaine; Heinrich, Joachim; Hoek, Gerard; Kluemper, Claudia; Koppelman, Gerard; Korek, Michal; Kraemer, Ursula; Lindley, Sarah; Moelter, Anna; Simpson, Angela; Standl, Marie; van Hage, Marianne; von Berg, Andrea; Wijga, Alet; Brunekreef, Bert; Pershagen, Goeran

    2014-01-01

    Background: Evidence on the long-term effects of air pollution exposure on childhood allergy is limited. Objective: We investigated the association between air pollution exposure and allergic sensitization to common allergens in children followed prospectively during the first 10 years of life. Meth

  17. A Neutron Burst Associated with an Extensive Air Shower?

    Science.gov (United States)

    Alves, Mauro; Martin, Inacio; Shkevov, Rumen; Gusev, Anatoly; De Abreu, Alessandro

    2016-07-01

    A portable and compact system based on a He-3 tube (LND, USA; model 25311) with an area of approximately 250 cm² and is used to record neutron count rates at ground level in the energy range of 0.025 eV to 10 MeV, in São José dos Campos, SP, Brazil (23° 12' 45" S, 45° 52' 00" W; altitude, 660m). The detector, power supply, digitizer and other hardware are housed in an air-conditioned room. The detector power supply and digitizer are not connected to the main electricity network; a high-capacity 12-V battery is used to power the detector and digitizer. Neutron counts are accumulated at 1-minute intervals continuously. The data are stored in a PC for further analysis. In February 8, 2015, at 12 h 22 min (local time) during a period of fair weather with minimal cloud cover (< 1 okta) the neutron detector recorded a sharp (count rate = 27 neutrons/min) and brief (< 1 min) increase in the count rate. In the days before and after this event, the neutron count rate has oscillated between 0 and 3 neutrons/min. Since the occurrence of this event is not related with spurious signals, malfunctioning equipment, oscillations in the mains voltage, etc. we are led to believe that the sharp increase was caused by a physical source such as a an extensive air shower that occurred over the detector.

  18. 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.

  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. Association between gaseous ambient air pollutants and adverse pregnancy outcomes in Vancouver, Canada.

    OpenAIRE

    Liu, Shiliang; Krewski, Daniel; Shi, Yuanli; Chen, Yue; Richard T. Burnett

    2003-01-01

    The association between ambient air pollution and adverse health effects, such as emergency room visits, hospitalizations, and mortality from respiratory and cardiovascular diseases, has been studied extensively in many countries, including Canada. Recently, studies conducted in China, the Czech Republic, and the United States have related ambient air pollution to adverse pregnancy outcomes. In this study, we examined association between preterm birth, low birth weight, and intrauterine growt...

  1. 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.

  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. Andean Basin Evolution Associated with Hybrid Thick- and Thin-Skinned Deformation in the Malargüe Fold-Thrust Belt, Western Argentina

    Science.gov (United States)

    Horton, B. K.; Fuentes, F.

    2015-12-01

    Andean deformation and basin evolution in the Malargüe fold-thrust belt of western Argentina (34-36°S) has been dominated by basement faults influenced by pre-existing Mesozoic rift structures of the hydrocarbon-rich Neuquen basin. However, the basement structures diverge from classic inversion structures, and the associated retroarc basin system shows a complex Mesozoic-Cenozoic history of mixed extension and contraction, along with an enigmatic early Cenozoic stratigraphic hiatus. New results from balanced structural cross sections (supported by industry seismic, well data, and surface maps), U-Pb geochronology, and foreland deposystem analyses provide improved resolution to examine the duration and kinematic evolution of Andean mixed-mode deformation. The basement structures form large anticlines with steep forelimbs and up to >5 km of structural relief. Once the propagating tips of the deeper basement faults reached cover strata, they fed slip to shallow thrust systems that were transported in piggyback fashion by newly formed basement structures, producing complex structural relationships. Detrital zircon U-Pb ages for the 5-7 km-thick basin fill succession reveal shifts in sedimentation pathways and accumulation rates consistent with (1) local basement sources during Early-Middle Jurassic back-arc extension, (2) variable cratonic and magmatic arc sources during Late Jurassic-Cretaceous postrift thermal subsidence, and (3) Andean arc and thrust-belt sources during irregular Late Cretaceous-Cenozoic shortening. Although pulses of flexural subsidence can be attributed to periods of fault reactivation (inversion) and geometrically linked thin-skinned thrusting, fully developed foreland basin conditions were only achieved in Late Cretaceous and Neogene time. Separating these two contractional episodes is an Eocene-lower Miocene (roughly 40-20 Ma) depositional hiatus within the Cenozoic succession, potentially signifying forebulge passage or neutral to

  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. A Neutron Burst Associated with an Extensive Air Shower?

    Science.gov (United States)

    Alves, Mauro; Martin, Inacio; Shkevov, Rumen; Gusev, Anatoly; De Abreu, Alessandro

    2016-07-01

    A portable and compact system based on a He-3 tube (LND, USA; model 25311) with an area of approximately 250 cm² and is used to record neutron count rates at ground level in the energy range of 0.025 eV to 10 MeV, in São José dos Campos, SP, Brazil (23° 12' 45" S, 45° 52' 00" W; altitude, 660m). The detector, power supply, digitizer and other hardware are housed in an air-conditioned room. The detector power supply and digitizer are not connected to the main electricity network; a high-capacity 12-V battery is used to power the detector and digitizer. Neutron counts are accumulated at 1-minute intervals continuously. The data are stored in a PC for further analysis. In February 8, 2015, at 12 h 22 min (local time) during a period of fair weather with minimal cloud cover (shower that occurred over the detector.

  6. 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...

  7. 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

  8. 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

    Directory of Open Access Journals (Sweden)

    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.

  9. 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.

  10. Association between Ambient Air Pollution and Outpatient Visits for Acute Bronchitis in a Chinese City

    Institute of Scientific and Technical Information of China (English)

    GUO Li Juan; ZHAO Ang; CHEN Ren Jie; KAN Hai Dong; KUANG Xing Ya

    2014-01-01

    Objective To investigate the short-term association between outdoor air pollution and outpatient visits for acute bronchitis, which is a rare subject of research in the mainland of China. Methods A time-series analysis was conducted to examine the association of outdoor air pollutants with hospital outpatient visits in Shanghai by using two-year daily data (2010-2011). Results Outdoor air pollution was found to be associated with an increased risk of outpatient visits for acute bronchitis in Shanghai. The effect estimates of air pollutants varied with the lag structures of the concentrations of the pollutants. For lag06, a 10μg/m3 increase in the concentrations of PM10, SO2, and NO2 corresponded to 0.94%(95%CI:0.83%, 1.05%), 11.12%(95%CI:10.76%, 11.48%), and 4.84%(95%CI: 4.49%, 5.18%) increases in hospital visits for acute bronchitis, respectively. These associations appeared to be stronger in females (P Conclusion Our analyses have provided the first evidence that the current air pollution level in China has an effect on acute bronchitis and that the rationale for further limiting air pollution levels in Shanghai should be strengthened.

  11. Fenómenos de licuefacción asociados a terremotos históricos. Su análisis en la evaluación del peligro sísmico en la Argentina Liquefaction phenomena associated with historic earthquakes: Their analysis in the evaluation of the seismic hazard in Argentina

    Directory of Open Access Journals (Sweden)

    L. Perucca

    2006-12-01

    earthquakes happened in Argentina. However, to exception of San Juan's province, studies referred to these phenomena are scarce, fundamentally due to the poor preservation of the structures. Although liquefaction has been described in many seismic regions of the world, in Argentina their effects have been underestimated. After the Spanish colonization, they have registered at least thirteen destructive earthquakes and associated liquefaction effects (1817, 1861, 1844, 1894, 1899, 1920, 1927, 1929, 1944, 1948, 1949 y 1952 that negatively impacted in the economy of the region along the last 200 years. However, it doesn't exist a clear relationship between the epicenters and the main Quaternary structures and in most of the cases, neither associated historical ruptures have been recognized, with the exception of those observed in La Laja (1944, Lago Fagnano (1949 and Niquizanga (1977 faults. It is also probable that many of these destructive earthquakes have been characterized by deformations distributed in folds and secondary faults, without surficial ruptures. During these earthquakes, the effects of liquefaction were the most spectacular results in the seismic shakes, causing most of the recorded damages. Becouse of that the study of the soils with physical conditions susceptible to suffer liquefaction during the occurrence of an earthquake in populated areas of Argentina, is a high-priority investigation field to carry out for an appropriate urban planning in the north-western portion of the country.

  12. Ecology of rodent-associated hantaviruses in the Southern Cone of South America: Argentina, Chile, Paraguay, and Uruguay.

    Science.gov (United States)

    Palma, R Eduardo; Polop, Jaime J; Owen, Robert D; Mills, James N

    2012-04-01

    Thirteen hantavirus genotypes, associated with at least 12 sigmodontine reservoir rodents, have been recognized in the four countries that represent the Southern Cone of South America. Host-virus relationships are not as well defined as in North America; several Southern Cone hantaviruses appear to share a common host and some viruses do not occur throughout the range of their host. Although hantavirus-host relationships in the Southern Cone are less strictly concordant with the single-host-single-virus pattern reported elsewhere, recent studies suggest that much of the ambiguity may result from an incomplete understanding of host and hantavirus systematics. Although some Southern Cone host species are habitat generalists, some sympatric species are habitat specialists, helping to explain how some strict host-virus pairings may be maintained. In some cases, host population densities were higher in peridomestic habitats and prevalence of hantavirus infection was higher in host populations in peridomestic habitats. Seasonal and multiyear patterns in climate and human disturbance affect host population densities, prevalence of infection, and disease risk to humans. Unusually high hantavirus antibody prevalence in indigenous human populations may be associated with frequent and close contact with host rodents. Ongoing studies are improving our understanding of hantavirus-host ecology and providing tools that may predict human risk.

  13. CT Air Trapping Is Independently Associated with Lung Function Reduction over Time

    OpenAIRE

    Mets, O.M.; de Jong, P. A.; van Ginneken, B.; Kruitwagen, C.L.J.J.; Prokop, M; Oudkerk, M; Lammers, J. W.; Zanen, P.

    2013-01-01

    Purpose We aimed to study the association between lung function decline and quantitative computed tomography (CT) air trapping. Materials and Methods Current and former heavy smokers in a lung cancer screening trial underwent volumetric low-dose CT in inspiration and expiration. Spirometry was obtained at baseline and after 3 years. The expiratory to inspiratory ratio of mean lung density (E/I-ratioMLD) was used to quantify air trapping. CT emphysema was defined as voxels in inspiratory CT be...

  14. Association between air pollution and preterm birth among neonates born in Isfahan, Iran

    OpenAIRE

    Mohsen Janghorbani; Janghorbani Piraei

    2013-01-01

    Background: Although several studies have investigated the association between maternal exposure to air pollution and preterm birth, the results are inconsistent. The aim of this study was to further investigate the relation between maternal exposure to ambient air pollution during pregnancy and the risk of preterm birth and low birth weight (LBW) in an Iranian pregnant population. Materials and Methods: In this study, we identified 4758 consecutive singleton birth records from one large refe...

  15. Assessment of internal contamination problems associated with bioregenerative air/water purification systems

    Science.gov (United States)

    Johnson, Anne H.; Bounds, B. Keith; Gardner, Warren

    1990-01-01

    The emphasis is to characterize the mechanisms of bioregenerative revitalization of air and water as well as to assess the possible risks associated with such a system in a closed environment. Marsh and aquatic plants are utilized for purposes of wastewater treatment as well as possible desalinization and demineralization. Foliage plants are also being screened for their ability to remove toxic organics from ambient air. Preliminary test results indicate that treated wastewater is typically of potable quality with numbers of pathogens such as Salmonella and Shigella significantly reduced by the artificial marsh system. Microbiological analyses of ambient air indicate the presence of bacilli as well as thermophilic actinomycetes.

  16. Determination of metals in air samples using X-Ray fluorescence associated the APDC preconcentration technique

    Energy Technology Data Exchange (ETDEWEB)

    Nardes, Raysa C.; Santos, Ramon S.; Sanches, Francis A.C.R.A.; Gama Filho, Hamilton S.; Oliveira, Davi F.; Anjos, Marcelino J., E-mail: rc.nardes@gmail.com, E-mail: ramonziosp@yahoo.com.br, E-mail: francissanches@gmail.com, E-mail: hamiltongamafilho@hotmail.com, E-mail: davi.oliveira@uerj.br, E-mail: marcelin@uerj.br [Universidade do Estado do Rio de Janeiro (UERJ), Rio de Janeiro, RJ (Brazil). Instituto de Fisica. Departamento de Fisica Aplicada e Termodinamica

    2015-07-01

    Air pollution has become one of the leading quality degradation factors of life for people in large urban centers. Studies indicate that the suspended particulate matter in the atmosphere is directly associated with risks to public health, in addition, it can cause damage to fauna, flora and public / cultural patrimonies. The inhalable particulate materials can cause the emergence and / or worsening of chronic diseases related to respiratory system and other diseases, such as reduced physical strength. In this study, we propose a new method to measure the concentration of total suspended particulate matter (TSP) in the air using an impinger as an air cleaning apparatus, preconcentration with APDC and Total Reflection X-ray Fluorescence technique (TXRF) to analyze the heavy metals present in the air. The samples were collected from five random points in the city of Rio de Janeiro/Brazil. Analyses of TXRF were performed at the Brazilian Synchrotron Light Laboratory (LNLS). The technique proved viable because it was able to detect five important metallic elements to environmental studies: Cr, Fe, Ni, Cu and Zn. This technique presented substantial efficiency in determining the elementary concentration of air pollutants, in addition to low cost. It can be concluded that the metals analysis technique in air samples using an impinger as sample collection instrument associated with a complexing agent (APDC) was viable because it is a low-cost technique, moreover, it was possible the detection of five important metal elements in environmental studies associated with industrial emissions and urban traffic. (author)

  17. Determination of metals in air samples using X-Ray fluorescence associated the APDC preconcentration technique

    International Nuclear Information System (INIS)

    Air pollution has become one of the leading quality degradation factors of life for people in large urban centers. Studies indicate that the suspended particulate matter in the atmosphere is directly associated with risks to public health, in addition, it can cause damage to fauna, flora and public / cultural patrimonies. The inhalable particulate materials can cause the emergence and / or worsening of chronic diseases related to respiratory system and other diseases, such as reduced physical strength. In this study, we propose a new method to measure the concentration of total suspended particulate matter (TSP) in the air using an impinger as an air cleaning apparatus, preconcentration with APDC and Total Reflection X-ray Fluorescence technique (TXRF) to analyze the heavy metals present in the air. The samples were collected from five random points in the city of Rio de Janeiro/Brazil. Analyses of TXRF were performed at the Brazilian Synchrotron Light Laboratory (LNLS). The technique proved viable because it was able to detect five important metallic elements to environmental studies: Cr, Fe, Ni, Cu and Zn. This technique presented substantial efficiency in determining the elementary concentration of air pollutants, in addition to low cost. It can be concluded that the metals analysis technique in air samples using an impinger as sample collection instrument associated with a complexing agent (APDC) was viable because it is a low-cost technique, moreover, it was possible the detection of five important metal elements in environmental studies associated with industrial emissions and urban traffic. (author)

  18. 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)

  19. 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.

  20. 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.

  1. Fluctuation analysis-based risk assessment for respiratory virus activity and air pollution associated asthma incidence.

    Science.gov (United States)

    Liao, Chung-Min; Hsieh, Nan-Hung; Chio, Chia-Pin

    2011-08-15

    Asthma is a growing epidemic worldwide. Exacerbations of asthma have been associated with bacterial and viral respiratory tract infections and air pollution. We correlated the asthma admission rates with fluctuations in respiratory virus activity and traffic-related air pollution, namely particulate matter with an aerodynamic diameter ≤ 10 μm (PM₁₀), nitrogen dioxide (NO₂), carbon monoxide (CO), sulfur dioxide (SO₂), and ozone (O₃). A probabilistic risk assessment framework was developed based on a detrended fluctuation analysis to predict future respiratory virus and air pollutant associated asthma incidence. Results indicated a strong association between asthma admission rate and influenza (r=0.80, pinfluenza to below 0.9. We concluded that fluctuation analysis based risk assessment provides a novel predictor of asthma incidence. PMID:21663946

  2. 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...

  3. 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.

  4. 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

  5. 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 ...

  6. Occupational health in Argentina.

    Science.gov (United States)

    Werner, A F

    2000-07-01

    Argentina is within the denominated "new industrialised countries", with the characteristic of having high contrasts in the urban population, based on service and industry, and in the rural population, based on agriculture and cattle, still the main sources of wealth in the country. The process of globalisation and the need to compete hard in international markets have provoked high unemployment and the transfer of workers from a formal market to an informal one. Legislation on occupational health is old and it is in the process of being updated. The system of prevention, assistance and compensation for accidents at work and for occupational illnesses has changed from being optative for employers, to the compulsory hiring of private insurance companies. The Government keeps the role of supervisor of the system. There are enough professionals in occupational health, hygiene and safety but not occupational nurses. The teaching is given by many universities and professional associations, some of which have an active profile in the occupational health of the country. PMID:10963410

  7. Microsporidian isolates from mosquitoes of Argentina

    Science.gov (United States)

    Microsporidia are among the most common and widely distributed microbial pathogens associated with mosquitoes in nature. Since 1980 studies of microsporidia in mosquitoes of Argentina were conducted at the Laboratory of Insect Vectors of CEPAVE. Eleven morphologically unique species of microsporidia...

  8. 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...

  9. 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°...

  10. 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.

  11. Air Pollution modifies the association between successful and pathological aging throughout the frailty condition.

    Science.gov (United States)

    Fougère, Bertrand; Vellas, Bruno; Billet, Sylvain; Martin, Perrine J; Gallucci, Maurizio; Cesari, Matteo

    2015-11-01

    The rapid growth in the number of older adults has many implications for public health, including the need to better understand the risks posed by environmental exposures. Aging leads to a decline and deterioration of functional properties at the cellular, tissue and organ level. This loss of functional properties yields to a loss of homeostasis and decreased adaptability to internal and external stress. Frailty is a geriatric syndrome characterized by weakness, weight loss, and low activity that is associated with adverse health outcomes. Frailty manifests as an age-related, biological vulnerability to stressors and decreased physiological reserves. Ambient air pollution exposure affects human health, and elderly people appear to be particularly susceptible to its adverse effects. The aim of this paper is to discuss the role of air pollution in the modulation of several biological mechanisms involved in aging. Evidence is presented on how air pollution can modify the bidirectional association between successful and pathological aging throughout the frailty conditions.

  12. 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.)

  13. Procesos macroeconómicos y homicidios. Un estudio ecológico en los partidos del gran Buenos Aires (Argentina entre los años 1989 y 2006

    Directory of Open Access Journals (Sweden)

    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

  14. GST M1 GENOTYPE INFLUENCES SPERM DNA DAMAGE ASSOCIATED WITH EXPOSURE TO AIR POLLUTION

    Science.gov (United States)

    For Society for Epidemiologic Research Meeting, June 15-18, 2004, Salt Lake City, Utah.Presenter: Sherry G. SelevanGSTM1 GENOTYPE INFLUENCES SPERM DNA DAMAGE ASSOCIATED WITH EXPOSURE TO AIR POLLUTION. J Rubes, SG Selevan*, R. Sram, DPEvenson, SD Perreault. VRI, ...

  15. Association between air pollution and asthma admission among children in Hong Kong

    OpenAIRE

    Lee, S L; Wong, W. H. S.; Lau, Y L

    2006-01-01

    Objective: To examine the association of air pollutants with hospital admission for childhood asthma in Hong Kong. Methods: Data on hospital admissions for asthma, influenza and total hospital admissions in children aged ≤18 years at all Hospital Authority hospitals during 1997-2002 were obtained. Data on daily mean concentrations of particles with aerodynamic diameter

  16. Helosis (Balanophoraceae en Argentina Helosis (Balanophoraceae in Argentina

    Directory of Open Access Journals (Sweden)

    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.

  17. Primera cita de Aleiodes laphygmae (Hymenoptera: Braconidae) para Argentina y de su asociación con larvas de Spodoptera eridania (Lepidoptera: Noctuidae) First record of Aleiodes laphygmae (Hymenoptera: Braconidae) for Argentina and its association with larvae of Spodoptera eridania (Lepidoptera: Noctuidae)

    OpenAIRE

    Liliana Valverde; D. Carolina Berta; Marcelo Geronimo Gomez

    2012-01-01

    Se reporta por primera vez para Argentina Aleiodes laphygmae (Viereck) (Hymenoptera: Braconidae) y como parasitoide de larvas de Spodoptera eridania (Stoll) (Lepidoptera: Noctuidae), en plantaciones de soja en la provincia de Tucumán (Argentina). Se provee información biológica como hábitos, hospedadores y distribución.Aleiodes laphygmae (Viereck) (Hymenoptera: Braconidae), is reported for the first time for Argentina. It is also reported parasitizing larvae of Spodoptera eridania (Stoll) (Le...

  18. The association between air travel and deep vein thrombosis: Systematic review & meta-analysis

    Directory of Open Access Journals (Sweden)

    Adi Yaser

    2004-05-01

    Full Text Available Abstract Background Air travel has been linked with the development of deep vein thrombosis (DVT since the 1950s with a number of plausible explanations put forward for causation. No systematic review of the literature exploring this association has previously been published. Methods A comprehensive search was undertaken (Data bases searched were: MEDLINE, EMBASE, Cochrane Library for studies that estimated both the incidence and the risk of DVT in air travellers relative to non-air travellers. Results In total 254 studies were identified but only six incidence studies and four risk studies met inclusion criteria justifying their use in a systematic review. Incidence of symptomatic DVT ranged from (0% in one study to (0.28% which was reported in pilots over ten years. The incidence of asymptomatic DVT ranged from (0% to (10.34%. Pooled odds ratios for the two case control studies examining the risk of DVT following air travel were 1.11 (95% CI: 0.64–1.94. Pooled odds ratios for all models of travel including two studies of prolonged air travel (more than three hours were 1.70 (95% CI: 0.89–3.22. Conclusion We found no definitive evidence that prolonged (more than 3-hours travel including air travel, increases the risk of DVT. There is evidence to suggest that flights of eight hours or more increase the risk of DVT if additional risk factors exist.

  19. Air Pollution and Preterm Birth in the U.S. State of Georgia (2002–2006): Associations with Concentrations of 11 Ambient Air Pollutants Estimated by Combining Community Multiscale Air Quality Model (CMAQ) Simulations with Stationary Monitor Measurements

    OpenAIRE

    Hao, Hua; Chang, Howard H.; Holmes, Heather A.; Mulholland, James A.; Klein, Mitch; Darrow, Lyndsey A.; Strickland, Matthew J

    2015-01-01

    Background: Previous epidemiologic studies suggest associations between preterm birth and ambient air pollution. Objective: We investigated associations between 11 ambient air pollutants, estimated by combining Community Multiscale Air Quality model (CMAQ) simulations with measurements from stationary monitors, and risk of preterm birth (< 37 weeks of gestation) in the U.S. state of Georgia. Methods: Birth records for singleton births ≥ 27 weeks of gestation with complete covariate informatio...

  20. Primera cita de Aleiodes laphygmae (Hymenoptera: Braconidae para Argentina y de su asociación con larvas de Spodoptera eridania (Lepidoptera: Noctuidae First record of Aleiodes laphygmae (Hymenoptera: Braconidae for Argentina and its association with larvae of Spodoptera eridania (Lepidoptera: Noctuidae

    Directory of Open Access Journals (Sweden)

    Liliana Valverde

    2012-06-01

    Full Text Available Se reporta por primera vez para Argentina Aleiodes laphygmae (Viereck (Hymenoptera: Braconidae y como parasitoide de larvas de Spodoptera eridania (Stoll (Lepidoptera: Noctuidae, en plantaciones de soja en la provincia de Tucumán (Argentina. Se provee información biológica como hábitos, hospedadores y distribución.Aleiodes laphygmae (Viereck (Hymenoptera: Braconidae, is reported for the first time for Argentina. It is also reported parasitizing larvae of Spodoptera eridania (Stoll (Lepidoptera: Noctuidae in soybeans crops in Tucumán province (Argentina. Biological information on habits, hosts and distribution is provided.

  1. Cerebral Arterial Air Embolism Associated with Mechanical Ventilation and Deep Tracheal Aspiration

    OpenAIRE

    Gursoy, S.; Duger, C.; Kaygusuz, K.; Ozdemir Kol, I.; Gurelik, B.; Mimaroglu, C.

    2012-01-01

    Arterial air embolism associated with pulmonary barotrauma has been considered a rare but a well-known complication of mechanical ventilation. A 65-year-old man, who had subarachnoid hemorrhage with Glasgow coma scale of 8, was admitted to intensive care unit and ventilated with the help of mechanical ventilator. Due to the excessive secretions, deep tracheal aspirations were made frequently. GCS decreased from 8–10 to 4-5, and the patient was reevaluated with cranial CT scan. In CT scan, air...

  2. Aire-dependent thymic development of tumor-associated regulatory T cells*

    Science.gov (United States)

    Malchow, Sven; Leventhal, Daniel S.; Nishi, Saki; Fischer, Benjamin I.; Shen, Lynn; Paner, Gladell P.; Amit, Ayelet S.; Kang, Chulho; Geddes, Jenna E.; Allison, James P.; Socci, Nicholas D.; Savage, Peter A.

    2013-01-01

    Despite considerable interest in the modulation of tumor-associated Foxp3+ regulatory T cells (Tregs) for therapeutic benefit, little is known about the developmental origins of these cells and the nature of the antigens that they recognize. Here, we identified an endogenous population of antigen-specific Tregs (termed “MJ23” Tregs) found recurrently enriched in the tumors of mice with oncogene-driven prostate cancer. MJ23 Tregs were not reactive to a tumor-specific antigen, but instead recognized a prostate-associated antigen that was present in tumor-free mice. MJ23 Tregs underwent Aire-dependent thymic development in both male and female mice. Thus Aire-mediated expression of peripheral tissue antigens drives the thymic development of a subset of organ-specific Tregs, which are likely co-opted by tumors developing within the associated organ. PMID:23471412

  3. Carta dinámica del medio ambiente del Partido de Luján, provincia de Buenos Aires-República Argentina. Primer etapa

    Directory of Open Access Journals (Sweden)

    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

    Directory of Open Access Journals (Sweden)

    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. China y Argentina: "Oportunidades y desafíos", o cristalización de una asociación dependiente | China and Argentina: opportunities and challenges or the result of a dependent association

    Directory of Open Access Journals (Sweden)

    Pablo Alejandro NACHT

    2012-06-01

    Full Text Available El presente artículo tiene como objetivo central realizar un análisis del proceso de vinculación y articulación de los diferentes actores argentinos con la República Popular China. Se busca entender el rol de las fracciones del bloque en el poder (burguesía rural, burguesía industrial nacional relevantes en la vinculación con China en el período planteado. El trabajo abarca desde 2002 hasta 2007 y da cuenta del cambio del régimen de acumulación capitalista, evidenciando una nueva configuración de fuerzas dentro del bloque y que encuentra, en la relación argentina con el gigante asiático, un socio destacado. Los sectores agroexportadores y las petroleras se erigen como las más beneficiadas en esta vinculación, al tiempo que la burguesía mercado internista menos competitiva presiona para frenar la entrada de manufacturas chinas. El estado argentino, lejos de ser un actor neutral, recibe importantes recursos por lo recaudado como derechos de exportación y es utilizado por el Gobierno; plasmándose de esta manera un escenario de tensiones y pujas entre los sectores, al tiempo que se cristaliza un modelo neo-extractivista con el monocultivo de soja transgénica como commoditie de exportación.This research article focus on the process of vinculation and coordination between different argentinian actors and China. It seeks to understand the role of the fractions of the power bloc (rural bourgeoisie, national industrial bourgeoisie, etc. relevant to the relationship with China in the period stated. The work ranges from 2002 to 2007 and shows the capitalist accumulation regime´s change, showing a new configuration of forces within the bloc and the relationship with the asian giant as leading partner. The agro-exporters and oil sectors stand as the main beneficiaries in this relationship, while the national industrial bourgeoisie pressed to stem the flow of Chinese products. The argentine state far from being a neutral actor, receives

  6. Associations between air pollution and peak expiratory flow among patients with persistent asthma.

    Science.gov (United States)

    Qian, Zhengmin; Lin, Hung-Mo; Chinchilli, Vernon M; Lehman, Erik B; Stewart, Walter F; Shah, Nirav; Duan, Yinkang; Craig, Timothy J; Wilson, William E; Liao, Duanping; Lazarus, Stephen C; Bascom, Rebecca

    2009-01-01

    Responses of patients with persistent asthma to ambient air pollution may be different from those of general populations. For example, asthma medications may modify the effects of ambient air pollutants on peak expiratory flow (PEF). Few studies examined the association between air pollution and PEF in patients with persistent asthma on well-defined medication regimens using asthma clinical trial data. Airway obstruction effects of ambient air pollutants, using 14,919 person-days of daily self-measured peak expiratory flow (PEF), were assessed from 154 patients with persistent asthma during the 16 wk of active treatment in the Salmeterol Off Corticosteroids Study trial. The three therapies were an inhaled corticosteroid, an inhaled long-acting beta-agonist, and placebo. The participants were nonsmokers aged 12 through 63 yr, recruited from 6 university-based ambulatory care centers from February 1997 to January 1999. Air pollution data were derived from the U.S. Environmental Protection Agency Aerometric Information Retrieval System. An increase of 10 ppb of ambient daily mean concentrations of NO2 was associated with a decrease in PEF of 1.53 L/min (95% confidence interval [CI] -2.93 to -0.14) in models adjusted for age, gender, race/ethnicity, asthma clinical center, season, week, daily average temperature, and daily average relative humidity. The strongest association between NO2 and PEF was observed among the patients treated with salmeterol. Negative associations were also found between PEF and SO2 and between PEF and PM(10), respectively. The results show that the two medication regimens protected against the effects of PM(10). However, salmeterol increased the sensitivity to NO2 and triamcinalone enhanced the sensitivity to SO2.

  7. Psicanálise e marxismo: a fratura da Associação Psicanalítica Argentina (1971 Psychoanalysis and Marxism: the splitting of the Argentine Psychoanalytic Association (1971

    Directory of Open Access Journals (Sweden)

    Hugo Vezzetti

    2009-01-01

    Full Text Available O artigo aborda um acontecimento inusual em que se cruzam a história da psicanálise e a da esquerda marxista: a renúncia, por motivos ideológicos, de dois grupos à associação argentina. O trabalho procura ir além do testemunho dos protagonistas e interrogar os relatos fixados sobre o acontecimento. Para isso explora, a partir dos anos de 1960, as condições e as alternativas desse encontro entre Freud e Marx, particularmente no âmbito universitário (a Faculdade de Filosofia e Letras da UBA, na organização corporativa profissional (a Federação Argentina de Psiquiatras e em organizações políticas da época (o Partido Comunista e o peronismo revolucionário.The article looks at an unusual event in which the history of psychoanalysis and that of the Marxist left intersected: the resignation of two groups from the Argentine association on ideological grounds. Looking to go beyond the testimony of the protagonists and interrogate the accounts focusing on the event, the text explores the conditions and alternatives of this encounter between Freud and Marx from the 1960s onwards, particularly in academia (the Faculty of Philosophy and Letters of the UBA, in a professional organization (the Argentine Federation of Psychiatrists and in political organizations active during the period (the Communist Party and revolutionary Peronism.

  8. Late Oligocene-Early Miocene compressional tectosedimentary episode and associated land-mammal faunas in the Andes of central Chile and adjacent Argentina (32 37°s)

    Science.gov (United States)

    Semper, Thierry; Marshall, Larry G.; Rivano, Sergio; Godoy, Estanislao

    1994-01-01

    A reassessment of the geologic and land-mammal fossil evidence used in attribution of a tectosedimentary episode in the Andes between 32 and 37°S to the Middle Eocene "Incaic tectonic phase" of Peru indicates that the episode occurred during Late Oligocene-Early Miocene times(~ 27-20 Ma). From west to east, three structural domains are recognized for this time span in the study area: a volcanic arc (Chile); a thin-skinned, E-verging fold-thrust belt (Cordillera Principal, Chile-Argentina border strip); and a foreland basin (Argentina). Initiation of thrusting in the Cordillera Principal fold-thrust belt produced the coeval initiation of sedimentation in the foreland basin of adjacent Argentina. This onset of foreland deposition postdates strata bearing a Divisaderan Land Mammal Age fauna (i.e. ~ 35-30 Ma) and is marked at ~ 36°30'S by the base of the "Rodados Lustrosos" conglomerates, which are conformably overlain by sedimentary rocks containing a Deseadan Land Mammal Age fauna (i.e. ~ 29-21 Ma). Geologic relationships between the thick volcanic Abanico (Coya-Machalí) and Farellones formations also demonstrate that this tectosedimentary episode practically ended at ~ 20 Ma at least in the volcanic arc, and was therefore roughly coeval with the major tectonic crisis (~ 27-19 Ma) known in northwestern Andean Bolivia some 1500 km to the north. This strongly suggests that a long, outstanding tectonic upheaval affected at least an extended 12-37°S segment of the Andean margin of South America during Late Oligocene and Early Miocene times.

  9. El intrusivo López Lecube: Evidencias de magmatismo alcalino Gondwánico en el sector sudoeste de la provincia de Buenos Aires, 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.

  10. Caracterización de los Servicios de Atención en Violencia Familiar del área metropolitana de 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.

  11. 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

  12. Factores predictivos de la no adherencia al tratamiento de la tuberculosis en municipios del Área Metropolitana de Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    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.

  13. 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...

  14. 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)

  15. Air pollution and diabetes association: Modification by type 2 diabetes genetic risk score.

    Science.gov (United States)

    Eze, Ikenna C; Imboden, Medea; Kumar, Ashish; von Eckardstein, Arnold; Stolz, Daiana; Gerbase, Margaret W; Künzli, Nino; Pons, Marco; Kronenberg, Florian; Schindler, Christian; Probst-Hensch, Nicole

    2016-09-01

    Exposure to ambient air pollution (AP) exposure has been linked to type 2 diabetes (T2D) risk. Evidence on the impact of T2D genetic variants on AP susceptibility is lacking. Compared to single variants, joint genetic variants contribute substantially to disease risk. We investigated the modification of AP and diabetes association by a genetic risk score (GRS) covering 63 T2D genes in 1524 first follow-up participants of the Swiss cohort study on air pollution and lung and heart diseases in adults. Genome-wide data and covariates were available from a nested asthma case-control study design. AP was estimated as 10-year mean residential particulate matter air pollution through alterations in insulin sensitivity. These results need confirmation in diabetes cohort consortia. PMID:27281273

  16. Cerebral Arterial Air Embolism Associated with Mechanical Ventilation and Deep Tracheal Aspiration

    Directory of Open Access Journals (Sweden)

    S. Gursoy

    2012-01-01

    Full Text Available Arterial air embolism associated with pulmonary barotrauma has been considered a rare but a well-known complication of mechanical ventilation. A 65-year-old man, who had subarachnoid hemorrhage with Glasgow coma scale of 8, was admitted to intensive care unit and ventilated with the help of mechanical ventilator. Due to the excessive secretions, deep tracheal aspirations were made frequently. GCS decreased from 8–10 to 4-5, and the patient was reevaluated with cranial CT scan. In CT scan, air embolism was detected in the cerebral arteries. The patient deteriorated and spontaneous respiratory activity lost just after the CT investigation. Thirty minutes later cardiac arrest appeared. Despite the resuscitation, the patient died. We suggest that pneumonia and frequent tracheal aspirations are predisposing factors for cerebral vascular air embolism.

  17. Association between the First Occurrence of Allergic Rhinitis in Preschool Children and Air Pollution in Taiwan.

    Science.gov (United States)

    Chung, Hui-Ying; Hsieh, Chia-Jung; Tseng, Chun-Chieh; Yiin, Lih-Ming

    2016-03-01

    The occurrence of allergic rhinitis (AR) may be significantly influenced by air pollution. This study examined the association between the first occurrence of AR in preschool children and the pre-incident levels of air pollutants in Taiwan. We identified 9960 eligible subjects from a systematic sampling cohort database containing 400,000 insureds of the National Health Insurance from 2007 to 2011 and matched them with the environmental monitoring data from 2006 to 2011 according to the locations of their clinics. Pre-incident levels were determined using the average concentrations of air pollutants one or two weeks prior to the AR diagnoses. Logistic regression analyses were performed to determine any significant relationships between AR and specific air pollutants. The first AR incidence for Taiwanese preschool children, which increased with age, was 10.9% on average; boys appeared to have a higher percentage (14.2%) than girls (8.27%). Among the air pollutants, carbon monoxide (CO) and nitrogen oxides (NOX) were significantly related to AR after adjusting for age and gender (p < 0.05). Because both pollutants are considered to be traffic emissions, this study suggests that traffic emissions in Taiwan need to be controlled to lower the prevalence of children's AR. PMID:26927153

  18. Association between the First Occurrence of Allergic Rhinitis in Preschool Children and Air Pollution in Taiwan

    Directory of Open Access Journals (Sweden)

    Hui-Ying Chung

    2016-02-01

    Full Text Available The occurrence of allergic rhinitis (AR may be significantly influenced by air pollution. This study examined the association between the first occurrence of AR in preschool children and the pre-incident levels of air pollutants in Taiwan. We identified 9960 eligible subjects from a systematic sampling cohort database containing 400,000 insureds of the National Health Insurance from 2007 to 2011 and matched them with the environmental monitoring data from 2006 to 2011 according to the locations of their clinics. Pre-incident levels were determined using the average concentrations of air pollutants one or two weeks prior to the AR diagnoses. Logistic regression analyses were performed to determine any significant relationships between AR and specific air pollutants. The first AR incidence for Taiwanese preschool children, which increased with age, was 10.9% on average; boys appeared to have a higher percentage (14.2% than girls (8.27%. Among the air pollutants, carbon monoxide (CO and nitrogen oxides (NOX were significantly related to AR after adjusting for age and gender (p < 0.05. Because both pollutants are considered to be traffic emissions, this study suggests that traffic emissions in Taiwan need to be controlled to lower the prevalence of children’s AR.

  19. Phylodynamics of vampire bat-transmitted rabies in Argentina

    OpenAIRE

    Torres, C.; Lema, C; DOHMEN, F. GURY; Beltran, F.; NOVARO, L.; S. Russo; Freire, M. C.; Velasco-Villa, A; Mbayed, V. A.; D. M. CISTERNA

    2014-01-01

    Common vampire bat populations distributed from Mexico to Argentina are important rabies reservoir hosts in Latin America. The aim of this work was to analyse the population structure of the rabies virus (RABV) variants associated with vampire bats in the Americas and to study their phylodynamic pattern within Argentina. The phylogenetic analysis based on all available vampire bat-related N gene sequences showed both a geographical and a temporal structure. The two largest groups of RABV vari...

  20. Reflexiones para una historia del documental en Argentina

    Directory of Open Access Journals (Sweden)

    Carmen Guarini

    2006-12-01

    Full Text Available Documentary cinema has had, in Argentina, an uncertain destination, in some periods it was protagonist, and in others almost disappeared.In this last decade it reached levels of interesting production and quality. It is already a common place to associate this growth to the social situation of crisis since 2001 that overflew in “filmed events”. However, in Argentina documentary possesses a long history that includes fundamental names for its construction.

  1. Estrategias de recuperacion y conservacion de entierros humanos en el sitio paso alsina 1 (curso inferior del Río Colorado, prov. de Buenos Aires,Argentina

    Directory of Open Access Journals (Sweden)

    Martínez, Gustavo Adolfo

    2009-01-01

    Full Text Available 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 sitio y la complejidad de la estructura funeraria datada en ca. 500 años AP llevaron a tomar una serie de decisiones metodológicas y técnicas ligadas al rescate de los entierros. Trabajos de laboreo con maquinarias agrícolas dejaron unidades anatómicas parcialmente expuestas y fragmentadas sobre la superficie del terreno. A partir de los hallazgos se desarrollaron tres campañas de excavación en el lapso de un año, recuperándose la totalidad de las inhumaciones. Durante los trabajos de campo se realizaron tareas de conservación preventivas (cobertura de los entierros por excavar y actividades de intervención (uso de consolidantes como resina de acetato de polivinilo o PVAc. En la mayoría de los casos, se procedió a la extracción de huesos individuales y cuando fue posible, los entierros se recuperaron en bloques. En el laboratorio se llevaron a cabo tareas de conservación y restauración de los elementos óseos. Actualmente, la muestra se encuentra acondicionada y almacenada, en bolsas y cajas libres de ácido, en gabinetes móviles dentro de un depósito con condiciones de temperatura y humedad estables. Esta serie de procedimientos permitió mantener la integridad del registro óseo para su posterior estudio bioarqueológico.

  2. Mathematics Education in Argentina

    Science.gov (United States)

    Varsavsky, Cristina; Anaya, Marta

    2009-01-01

    This article gives an overview of the state of mathematics education in Argentina across all levels, in the regional and world contexts. Statistics are drawn from Mercosur and UNESCO data bases, World Education Indicators and various national time-series government reports. Mathematics results in national testing programmes, Programme for…

  3. A lab in Argentina

    Science.gov (United States)

    2016-06-01

    Mauricio Erben, a researcher at the National University of La Plata and the National Scientific and Technical Research Council, talks to Nature Chemistry about his experience of research in Argentina, and how it is inherently linked to the country's political climate.

  4. Albert Einstein visits Argentina

    CERN Document Server

    Gangui, A; Gangui, Alejandro; Ortiz, Eduardo L.

    2005-01-01

    This is a detailed, day by day, account of Albert Einstein's activities, both social and scientific, during his 30-day stay in Argentina in 1925, including his lectures on relativity at the various local universities and his visit to the National Academy of Sciences, as follows from his personal Diary of the trip to South-America and other contemporary documents.

  5. Short-term associations between outdoor air pollution and mortality in London 1992-4

    OpenAIRE

    Bremner, S A; Anderson, H R; Atkinson, R W; McMichael, A.J.; Strachan, D. P.; Bland, J. M.; Bower, J. S.

    1999-01-01

    OBJECTIVES: A previous study of the short term effects of air pollution in London from April 1987 to March 1992 found associations between all cause mortality and black smoke and ozone, but no clear evidence of specificity for cardiorespiratory deaths. London data from 1992 to 1994 were analysed to examine the consistency of results over time and to include particles with a mean aerodynamic diameter of 10 microns (PM10) and carbon monoxide. METHODS: Poisson regression was used of daily ...

  6. A study on the reconstruction of Los Acantilados Beach, Argentina

    NARCIS (Netherlands)

    Algera, A.; Burger, B.; Hartog, W.M.; De Rijke, Q.C.

    2004-01-01

    The city of Mar del Plata is situated some 400 km South of Buenos Aires, the capital of Argentina. The city has two main incomes, namely industry and tourism. In summer, beaches of this Atlantic Ocean faced destination are packed with typical Argentine beach tents, which can be rented, and people fr

  7. Associations between immune function and air pollution among postmenopausal women living in the Puget Sound airshed

    Science.gov (United States)

    Williams, Lori A.

    Air pollution is associated with adverse health outcomes, and changes in the immune system may be intermediate steps between exposure and a clinically relevant adverse health outcome. We analyzed the associations between three different types of measures of air pollution exposure and five biomarkers of immune function among 115 overweight and obese postmenopausal women whose immunity was assessed as part of a year-long moderate exercise intervention trial. For air pollution metrics, we assessed: (1) residential proximity to major roads (freeways, major arterials and truck routes), (2) fine particulate matter(PM2.5) at the nearest monitor to the residence averaged over three time windows (3-days, 30-days and 60-days), and (3) nitrogen dioxide (NO2) modeled based on land use characteristics. Our immune biomarkers included three measures of inflammation---C-reactive protein, serum amyloid A and interleukin-6---and two measures of cellular immunity---natural killer cell cytotoxicity and T lymphocyte proliferation. We hypothesized that living near a major road, increased exposure to PM2.5 and increased exposure to NO2 would each be independently associated with increased inflammation and decreased immune function. We observed a 21% lower average natural killer cell cytotoxicity among women living within 150 meters of a major arterial road compared to other women. For PM2.5 , we observed changes in 3 of 4 indicators of lymphocyte proliferation stimulated by anti-CD3---an antibody to the T cell receptor associated with increases in 3-day averaged PM2.5. For 30-day averaged PM 2.5 and 60-day averaged PM2.5 we did not observe any statistically significant associations. We observed an increase in lymphocyte proliferation index stimulated by the plant protein phytohemagglutinin (PHA) at 1 of 2 PHA concentrations in association with modeled NO2. For the three inflammatory markers, we observed no notable associations with any of our measures of air pollution. If confirmed, our

  8. Tendencias del régimen de precipitación y el manejo sustentable de los agroecosistemas: estudio de un caso en el noroeste de la provincia de Buenos Aires, Argentina.

    Directory of Open Access Journals (Sweden)

    Silvia P. Pérez

    2006-05-01

    Full Text Available Durante las últimas décadas se ha tomado una creciente conciencia de la importancia del cambio climático sobre el manejo sustentable de los agroecosistemas. El abordaje de esta problemática requiere un enfoque interdisciplinario que puede hacerse a través de la metodología de estudio del caso. Un caso de estudio de notable interés se presenta en el noroeste de la Provincia de Buenos Aires, Argentina, donde el aumento en las precipitaciones permitió un incremento de la superficie dedicada a la agricultura en secano. Es importante dilucidar si dicho fenómeno constituye un cambio irreversible o forma parte de un ciclo de larga duración, con fases secas y húmedas, separadas por fases de transición. Pudo comprobarse que, aunque la teoría del ciclo de lluvias explica un mayor porcentaje de la varianza total de las series estudiadas, ambas teorías presentan una correlación significativa con los fenómenos observados por lo que no puede excluirse ninguna de las dos hipótesis. Si bien no se cuenta aún con evidencias suficientes como para demostrar la validez de una u otra teoría, deben preverse las decisiones estratégicas necesarias para producir en uno u otro ambiente como así también considerar las posibles consecuencias de un error de evaluación. Finalmente se concluye que en un escenario de incertidumbre, resulta preferible renunciar al máximo beneficio, y apuntar a una máxima seguridad de cosecha, eligiendo variedades, épocas de siembra, densidades, métodos de labranza, y todos los recursos tecnológicos disponibles para producir en un ambiente desfavorable, pues lo que podría causar una catástrofe productiva y ambiental no es que el régimen de precipitaciones sufra una disminución, sino que ésta tome desprevenido al sistema productivo sin que se hayan tomado las medidas necesarias para hacerle frente.

  9. XXXVIII Annual meeting of the Argentine Association of Nuclear Technology (AATN 2011)

    International Nuclear Information System (INIS)

    The 38th Annual meeting of the Argentine Association of Nuclear Technology was organized by the AATN (Asociacion Argentina de Tecnologia Nuclear) in Buenos Aires, Argentine, between the 14 and 18 November of 2011. In this event 146 papers in 16 Sessions, with 13 Plenary Conferences and 3 Roundtables were presented.

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

    Directory of Open Access Journals (Sweden)

    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.

  11. The association of annual air pollution exposure with blood pressure among patients with sleep-disordered breathing.

    Science.gov (United States)

    Liu, Wen-Te; Lee, Kang-Yun; Lee, Hsin-Chien; Chuang, Hsiao-Chi; Wu, Dean; Juang, Jer-Nan; Chuang, Kai-Jen

    2016-02-01

    While sleep-disordered breathing (SDB), high blood pressure (BP) and air pollution exposure have separately been associated with increased risk of cardiopulmonary mortality, the association linking air pollution exposure to BP among patients with sleep-disordered breathing is still unclear. We collected 3762 participants' data from the Taipei Medical University Hospital's Sleep Center and air pollution data from the Taiwan Environmental Protection Administration. Associations of 1-year mean criteria air pollutants [particulate matter with aerodynamic diameters ≤10 μm (PM10), particulate matter with aerodynamic diameters ≤2.5 μm (PM2.5), nitrogen dioxide (NO2) and ozone (O3)] with systolic BP (SBP) and diastolic BP (DBP) were investigated by generalized additive models. After controlling for age, sex, body mass index (BMI), temperature and relative humidity, we observed that increases in air pollution levels were associated with decreased SBP and increased DBP. We also found that patients with apnea-hypopnea index (AHI) ≥30 showed a stronger BP response to increased levels of air pollution exposure than those with AHIpollution exposure on BP were found in overweight participants than in participants with normal BMI. We concluded that annual exposure to air pollution was associated with change of BP among patients with sleep-disordered breathing. The association between annual air pollution exposure and BP could be modified by AHI and BMI.

  12. National expenditures, jobs, and economic growth associated with indoor air quality in the United States.

    Science.gov (United States)

    Mudarri, David H

    2014-05-01

    While a number of studies have addressed the economic cost associated with adverse health and productivity effects of poor indoor air quality (IAQ), few have addressed the value of economic expenditures and job creation associated with this industry. This article estimates that the annual sale of IAQ products and services is valued at $18-$30 billion and is associated with approximately 150,000-250,000 current jobs. Compared with other familiar industries, the IAQ market remains relatively small. Given the close association between good IAQ and both job performance of adults and learning performance of children, however, the expenditure to maintain good IAQ in commercial and educational facilities is a useful complement to programs designed to improve education and economic growth.

  13. Helosis (Balanophoraceae) en Argentina Helosis (Balanophoraceae) in Argentina

    OpenAIRE

    José Luis Fontana; Orlando Fabián Popoff

    2006-01-01

    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 ilustra...

  14. Spatial associations between socioeconomic groups and NO2 air pollution exposure within three large Canadian cities.

    Science.gov (United States)

    Pinault, Lauren; Crouse, Daniel; Jerrett, Michael; Brauer, Michael; Tjepkema, Michael

    2016-05-01

    Previous studies of environmental justice in Canadian cities have linked lower socioeconomic status to greater air pollution exposures at coarse geographic scales, (i.e., Census Tracts). However, studies that examine these associations at finer scales are less common, as are comparisons among cities. To assess differences in exposure to air pollution among socioeconomic groups, we assigned estimates of exposure to ambient nitrogen dioxide (NO2), a marker for traffic-related pollution, from city-wide land use regression models to respondents of the 2006 Canadian census long-form questionnaire in Toronto, Montreal, and Vancouver. Data were aggregated at a finer scale than in most previous studies (i.e., by Dissemination Area (DA), which includes approximately 400-700 persons). We developed simultaneous autoregressive (SAR) models, which account for spatial autocorrelation, to identify associations between NO2 exposure and indicators of social and material deprivation. In Canada's three largest cities, DAs with greater proportions of tenants and residents who do not speak either English or French were characterised by greater exposures to ambient NO2. We also observed positive associations between NO2 concentrations and indicators of social deprivation, including the proportion of persons living alone (in Toronto), and the proportion of persons who were unmarried/not in a common-law relationship (in Vancouver). Other common measures of deprivation (e.g., lone-parent families, unemployment) were not associated with NO2 exposures. DAs characterised by selected indicators of deprivation were associated with higher concentrations of ambient NO2 air pollution in the three largest cities in Canada. PMID:26950027

  15. Sewage impact on the composition and distribution of Polychaeta associated to intertidal mussel beds of the Mar del Plata rocky shore, Argentina

    Directory of Open Access Journals (Sweden)

    Elías Rodolfo

    2003-01-01

    Full Text Available The polychaete composition and distribution within mussel beds were studied in order to assess organic pollution due to domestic sewage in a rocky shore of Mar del Plata (Argentina during 1997. Four stations and a control site were randomly sampled around the local effluent. Quantitative data on polychaetes, as well as sediment accumulated among mussels and its organic carbon content were measured. Polychaete distribution patterns are related to the organic matter gradient, being Capitella cf. capitata, Neanthes succinea (Frey & Leuckart, 1847 and Boccardia polybranchia (Haswell, 1885 the dominant indicator species close to the effluent. At medial distances, the cirratulids Caulleriella alata (Southern, 1914 and Cirratulus cirratus (Müller, 1776 are very important in abundance. The syllids Syllis prolixa Ehlers, 1901 and S. gracilis Grube, 1840 are distributed along the study area, but dominate at the medial stations and at the control site. The orbiniid Protoariciella uncinata Hartmann-Schröder, 1962 is subdominant at the control station.

  16. Phylodynamics of vampire bat-transmitted rabies in Argentina.

    Science.gov (United States)

    Torres, C; Lema, C; Dohmen, F Gury; Beltran, F; Novaro, L; Russo, S; Freire, M C; Velasco-Villa, A; Mbayed, V A; Cisterna, D M

    2014-05-01

    Common vampire bat populations distributed from Mexico to Argentina are important rabies reservoir hosts in Latin America. The aim of this work was to analyse the population structure of the rabies virus (RABV) variants associated with vampire bats in the Americas and to study their phylodynamic pattern within Argentina. The phylogenetic analysis based on all available vampire bat-related N gene sequences showed both a geographical and a temporal structure. The two largest groups of RABV variants from Argentina were isolated from northwestern Argentina and from the central western zone of northeastern Argentina, corresponding to livestock areas with different climatic, topographic and biogeographical conditions, which determined their dissemination and evolutionary patterns. In addition, multiple introductions of the infection into Argentina, possibly from Brazil, were detected. The phylodynamic analysis suggests that RABV transmission dynamics is characterized by initial epizootic waves followed by local enzootic cycles with variable persistence. Anthropogenic interventions in the ecosystem should be assessed taking into account not only the environmental impact but also the potential risk of disease spreading through dissemination of current RABV lineages or the emergence of novel ones associated with vampire bats. PMID:24661865

  17. Phylodynamics of vampire bat-transmitted rabies in Argentina

    Science.gov (United States)

    DOHMEN, F. GURY; BELTRAN, F.; NOVARO, L.; RUSSO, S.; FREIRE, M. C.; VELASCO-VILLA, A.; MBAYED, V. A.; CISTERNA, D. M.

    2016-01-01

    Common vampire bat populations distributed from Mexico to Argentina are important rabies reservoir hosts in Latin America. The aim of this work was to analyse the population structure of the rabies virus (RABV) variants associated with vampire bats in the Americas and to study their phylodynamic pattern within Argentina. The phylogenetic analysis based on all available vampire bat-related N gene sequences showed both a geographical and a temporal structure. The two largest groups of RABV variants from Argentina were isolated from northwestern Argentina and from the central western zone of northeastern Argentina, corresponding to livestock areas with different climatic, topographic and biogeographical conditions, which determined their dissemination and evolutionary patterns. In addition, multiple introductions of the infection into Argentina, possibly from Brazil, were detected. The phylodynamic analysis suggests that RABV transmission dynamics is characterized by initial epizootic waves followed by local enzootic cycles with variable persistence. Anthropogenic interventions in the ecosystem should be assessed taking into account not only the environmental impact but also the potential risk of disease spreading through dissemination of current RABV lineages or the emergence of novel ones associated with vampire bats. PMID:24661865

  18. 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

  19. Association between indoor and outdoor air pollution and adolescent asthma from 1995 to 1996 in Taiwan

    Energy Technology Data Exchange (ETDEWEB)

    Wang, T.N.; Ko, Y.C.; Chao, Y.Y.; Huang, C.C.; Lin, R.S.

    1999-10-01

    The study aim was to estimate the contribution of indoor and outdoor air pollution to the 1-year prevalence of adolescent asthma after personal susceptibility and other potential risk factors were taken into account. A large-scaled cross-sectional study was conducted among 165,173 high school students aged 11 to 16 years in the different communities of Kaohsiung and Pintong in Taiwan, from October 1995 to June 1996. Each student and his/her parents participating in the study completed a video and a written International Study of Asthma and Allergies in Childhood questionnaire about symptoms of wheezing and allergies, passive smoking, and demographic variables. After adjustment for potential confounders, adolescents exposed to cigarette smoking and environmental tobacco smoke were found to suffer from asthma at an increased frequency. The authors observed a statistically significant association between outdoor air pollution and asthma, after controlling for potential confound variables. Total suspended particulate, nitrogen dioxide, carbon monoxide, ozone, and airborne dust particles all displayed an independent association with asthma, respectively. There were no selection biases in this community-based study, which provides evidence that passive smoking and long-term, high average outdoor air pollution are independent risk factors of asthma.

  20. Cryptosporidium varanii infection in leopard geckos (Eublepharis macularius) in Argentina

    Science.gov (United States)

    Dellarupe, A.; Unzaga, J.M.; Moré, G.; Kienast, M.; Larsen, A.; Stiebel, C.; Rambeaud, M.; Venturini, M.C.

    2016-01-01

    Cryptosporidiosis is observed in reptiles with high morbidity and considerable mortality. The objective of this study was to achieve the molecular identification of Cryptosporidium spp. in pet leopard geckos (Eublepharis macularius) from a breeder colony in Buenos Aires, Argentina. Oocysts comparable to those of Cryptosporidium spp. were detected in three geckos with a history of diarrhea, anorexia and cachexia. Molecular identification methods confirmed the presence of Cryptosporidium varanii (syn. C. saurophilum). This agent was considered to be the primary cause of the observed clinical disease. This is the first description of C. varanii infection in pet reptiles in Argentina. PMID:27419102

  1. Cryptosporidium varanii infection in leopard geckos (Eublepharis macularius) in Argentina.

    Science.gov (United States)

    Dellarupe, A; Unzaga, J M; Moré, G; Kienast, M; Larsen, A; Stiebel, C; Rambeaud, M; Venturini, M C

    2016-01-01

    Cryptosporidiosis is observed in reptiles with high morbidity and considerable mortality. The objective of this study was to achieve the molecular identification of Cryptosporidium spp. in pet leopard geckos (Eublepharis macularius) from a breeder colony in Buenos Aires, Argentina. Oocysts comparable to those of Cryptosporidium spp. were detected in three geckos with a history of diarrhea, anorexia and cachexia. Molecular identification methods confirmed the presence of Cryptosporidium varanii (syn. C. saurophilum). This agent was considered to be the primary cause of the observed clinical disease. This is the first description of C. varanii infection in pet reptiles in Argentina. PMID:27419102

  2. Cryptosporidium varanii infection in leopard geckos (Eublepharis macularius in Argentina

    Directory of Open Access Journals (Sweden)

    A. Dellarupe

    2016-06-01

    Full Text Available Cryptosporidiosis is observed in reptiles with high morbidity and considerable mortality. The objective of this study was to achieve the molecular identification of Cryptosporidium spp. in pet leopard geckos (Eublepharis macularius from a breeder colony in Buenos Aires, Argentina. Oocysts comparable to those of Cryptosporidium spp. were detected in three geckos with a history of diarrhea, anorexia and cachexia. Molecular identification methods confirmed the presence of Cryptosporidium varanii (syn. C. saurophilum. This agent was considered to be the primary cause of the observed clinical disease. This is the first description of C. varanii infection in pet reptiles in Argentina.

  3. Spatial variations in the associations of term birth weight with ambient air pollution in Georgia, USA.

    Science.gov (United States)

    Tu, Jun; Tu, Wei; Tedders, Stuart H

    2016-01-01

    Birth weight is an important indicator of overall infant health and a strong predictor of infant morbidity and mortality, and low birth weight (LBW) is a leading cause of infant mortality in the United States. Numerous studies have examined the associations of birth weight with ambient air pollution, but the results were inconsistent. In this study, a spatial statistical technique, geographically weighted regression (GWR) is applied to explore the spatial variations in the associations of birth weight with concentrations of ozone (O3) and fine particulate matter (PM2.5) in the State of Georgia, USA adjusted for gestational age, parity, and six other socioeconomic, behavioral, and land use factors. The results show considerable spatial variations in the associations of birth weight with both pollutants. Significant positive, non-significant, and significant negative relationships between birth weight and concentrations of each air pollutant are all found in different parts of the study area, and the different types of the relationships are affected by the socioeconomic and urban characteristics of the communities where the births are located. The significant negative relationships between birth weight and O3 indicate that O3 is a significant risk factor of LBW and these associations are primarily located in less-urbanized communities. On the other hand, PM2.5 is a significant risk factor of LBW in the more-urbanized communities with higher family income and education attainment. These findings suggest that environmental and health policies should be adjusted to address the different effects of air pollutants on birth outcomes across different types of communities to more effectively and efficiently improve birth outcomes. PMID:27104672

  4. Poverty and Health in Argentina

    Directory of Open Access Journals (Sweden)

    Maria Alejandra Silva

    2009-06-01

    Full Text Available This article examines health conditions in the rural areas of Central Argentina, the country’s main region for soy-bean production and export. Health conditions are analyzed through the concepts of emerging and re-emerging diseases in a context of increasing poverty. Data on poverty and health was obtained from both primary sources (trade union, government officials, rural doctors and the South Watch/FA/FODEPAL/UNR working group and secondary sources (IPEC/INDEC, IDESA, Consultora Equis, the Argentine Ministry of Employment, ILO, the Ministry of Health, the Ministry of the Environment, toxicology centers and rural doctors. Analysis of rural health conditions gives cause for concern. There is evidence of deterioration in the social determinants of health such as an increase in rural and urban poverty associated with informal employment and child labor. At the same time lack of government epidemiological and toxicological data appears to hide or distort the reality of health conditions.

  5. Coffee husk associated with firewood as fuel for indirect heating of drying air

    Energy Technology Data Exchange (ETDEWEB)

    Magalhaes, Edney Alves; Silva, Juarez de Sousa e; Silva, Jadir Nogueira da; Oliveira Filho, Delly [Universidade Federal de Vicosa (DEA/UFV), MG (Brazil). Dept. de Engenharia Agricola; Donzeles, Sergio Mauricio Lopes [Empresa de Pesquisa Agropecuaria de Minas Gerais (EPAMIG), Vicosa, MG (Brazil)

    2008-07-01

    The objective of this work was the performance analysis of a furnace, burning coffee husk associated with firewood to heat the drying air passing through a heat exchanger. For the analysis the temperature variation, the combustion quality, the heat losses and the furnace thermal efficiency were all monitored. Results showed that the furnace average efficiency was 58.3% and the heat losses in the exhaust were 24.3%. The presence of carbon monoxide in the exhaust gases (average 2982.8 ppm) had proven incomplete combustion, and suggesting that the combustion gases can not be used to directly drying of foods. Despite of indirect heating, the presented thermal efficiency indicates that the burning of coffee husks is one economic alternative for air heating in grain drying or in other agricultural processes. (author)

  6. The Association between Ambient Air Pollution and Daily Mortality in Beijing after the 2008 Olympics: A Time Series Study

    OpenAIRE

    Yang Yang; Runkui Li; Wenjing Li; Meng Wang; Yang Cao; Zhenglai Wu; Qun Xu

    2013-01-01

    In recent decades, ambient air pollution has been an important public health issue in Beijing, but little is known about air pollution and health effects after the 2008 Beijing Olympics. We conduct a time-series analysis to evaluate associations between daily mortality (nonaccidental, cardiovascular and respiratory mortality) and the major air pollutants (carbon monoxide, nitrogen dioxide and particulate matter less than 10 µm in aerodynamic diameter) in Beijing during the two years (2009,201...

  7. Association of air pollution with daily GP consultations for asthma and other lower respiratory conditions in London

    OpenAIRE

    Hajat, S.; Haines, A; Goubet, S; Atkinson, R.; Anderson, H.

    1999-01-01

    BACKGROUND—Very few published studies have looked at the effects of air pollution on health in the primary care setting. As part of a large study to examine the association between air pollution and a number of health outcomes, the relationship between daily GP consultations for asthma and other lower respiratory diseases (LRD) and air pollution in London was investigated.
METHODS—Time-series analysis of daily numbers of GP consultations controlling for time trends, seaso...

  8. The Huillin in Argentina

    OpenAIRE

    Chehebar C.

    1986-01-01

    We recommend re-introduction of huillines in Lanin, Puelo and Los Alerces National Parks, through translocations of animals, so as to minimize the risks involved in the present dependence on Nahuel Huapi and Staten Island (as far as we know) for the conservation of the species in Argentina. Also, we recommend careful monitoring and protection of the Nahuel Huapi population and protection of the Staten Island ecosystems.

  9. Psychology In Argentina

    OpenAIRE

    Modesto M. Alonso

    2016-01-01

    A summary on Psychology as science and profession in Argentina is presented. The report includes a historical review on places, criteria and results of psychologists'education, aspects of their professional practices; quantitative data on universities, graduates and students related to sociodemographic variables; characteristics of research activities, publications, legal frameworks and types of institutions where psychologists work. Some distinctive features of Argentine psychology are menti...

  10. Episodic air pollution is associated with increased DNA fragmentation in human sperm without other changes in semen quality

    Energy Technology Data Exchange (ETDEWEB)

    Rubes, J.; Selevan, S.G.; Evenson, D.P.; Zudova, D.; Vozdova, M.; Zudova, Z.; Robbins, W.A.; Perreault, S.D. [US EPA, Research Triangle Park, NC (United States)

    2005-10-01

    This study examined potential associations between exposure to episodes of air pollution and alterations in semen quality. The air pollution, resulting from combustion of coal for industry and home heating in the Teplice district of the Czech Republic, was much higher during the winter than at other times of year with peaks exceeding US air quality standards. Young men from Teplice were sampled up to seven times over 2 years allowing evaluation of semen quality after periods of exposure to both low and high air pollution. Routine semen analysis (sperm concentration, motility and morphology) and tests for sperm aneuploidy and chromatin integrity were performed, comparing measurements within each subject. Exposure was classified as high or low based on data from ambient air pollution monitoring. Using repeated measures analysis, a significant association was found between exposure to periods of high air pollution (at or above the upper limit of US air quality standards) and the percentage of sperm with DNA fragmentation according to sperm chromatin structure assay (SCSA). Other semen measures were not associated with air pollution. It is concluded that exposure to intermittent air pollution may result in sperm DNA damage and thereby increase the rates of male-mediated infertility, miscarriage, and other adverse reproductive outcomes.

  11. DIETARY VITAMIN E DEFICIENCY AS A MODIFIER OF THE ASSOCIATIONS OF RESPIRATORY OUTCOMES WITH AIR POLLUTION IN ADOLESCENTS

    Science.gov (United States)

    Introduction: We investigated whether low dietary intake of the lipophilic antioxidant vitamin E may act as a modifier of chronic air pollution's associations with respiratory outcomes among adolescents due to an increased respiratory response to the oxidative effects of air pol...

  12. Associations between air pollution and socioeconomic characteristics, ethnicity and age profile of neighbourhoods in England and the Netherlands

    NARCIS (Netherlands)

    Fecht, Daniela; Fischer, Paul; Fortunato, Léa; Hoek, Gerard; de Hoogh, Kees; Marra, Marten; Kruize, Hanneke; Vienneau, Danielle; Beelen, Rob; Hansell, Anna

    2015-01-01

    Air pollution levels are generally believed to be higher in deprived areas but associations are complex especially between sensitive population subgroups. We explore air pollution inequalities at national, regional and city level in England and the Netherlands comparing particulate matter (PM10) and

  13. Anomalías de circulación atmosférica en 500 y 1000 hpa asociada a la sequía producida en la Argentina durante enero de 2003 a marzo de 2004 Anomalies of the atmospheric circulation at 500 and 1000 hpa associated with the dry period in Argentina from january 2003 to march 2004

    Directory of Open Access Journals (Sweden)

    Adelia Perla Alessandro

    2008-03-01

    Full Text Available Neste trabalho se analisa e descreve a situação sinótica associada à precipitação e temperatura do território argentino durante o ano de 2003 e o primeiro trimestre de 2004. A escolha deste período obedece à falta de precipitações em pelo menos dez províncias argentinas, o que ocasionou grandes prejuízos econômicos no setor agropecuário. Com o intuito de determinar as causas deste déficit de precipitações foram analisados os campos médios de altura geopotencial nos níveis de 500 e 1000 hPa e suas anomalias. Em 2003, o déficit de precipitação se associa principalmente às anomalias de geopotencial no nível de 500 hPa, que mostram um fluxo dominante de SO que atravessa o país diagonalmente entre 45°S e 30°S. Em 1000 hPa o anticiclone subtropical do Atlântico se encontra enfraquecido, deslocado para o norte e afastado do continente, enquanto que o anticiclone subrtopical do Pacífico está mais intenso e deslocado para leste respeito da sua posição normal. No primeiro trimestre de 2004 a seca se deve principalmente à presença de uma crista no nível de 500 hPa posicionada no centro do país. As anomalias médias de temperatura do período considerado resultam positivas sobre toda a Argentina. Em 2003, essas anomalias se devem à contribuição do fluxo do N-NE desde o norte do país, à subsidência ocasionada pelo anticiclone do Pacífico mais deslocado para o interior do continente e a orografia. No primeiro trimestre de 2004 as anomalias se originam devido ao fluxo do norte e à freqüente circulação anticiclônica no Atlântico ao sul de 35°S.This paper analyzes and describes the synoptic situation associated with precipitation and temperature in Argentina during 2003 and the first quarter of 2004. The period was selected as during that time drought affected at least ten Argentine provinces, causing great agricultural and ranching losses. In order to find the causes of such rainfall deficit the mean and

  14. Short-term associations between air pollution and respiratory drug sales

    International Nuclear Information System (INIS)

    Study objective: This research was implemented to assess the effect of air pollution on anti-asthmatic, bronchodilator, and cough and cold preparation sales in the city of Rouen (France) based on the Upper Normandy Regional Union of Health Insurance Offices database and the Air Quality Monitoring Network database. Design: An ecological time-series analysis was performed for a period of 2 years (July 1998-June 2000). Generalized additive model yields to relative risks and 95% confidence interval (CI) estimates were also carried out. Main results: The 10-day cumulative effect of a 10-μg/m3 black smoke increase was significantly associated with a 6.2% (95% CI, 2.4-10.1%) increase in the sales of anti-asthmatics and bronchodilators and to a 9.2% (95% CI, 5.9-12.6%) increase in the sales of cough and cold preparation for children aged under 15 years. The cumulative effect of a 10-μg/m3 increase in SO2 was associated with an 11.8% (95% CI, 6.7-17.1%) increase in cough and cold preparation sales for children aged under 15 years. The cumulative effect of 10-μg/m3 increase in NO2 was associated with an 13.6% (95% CI, 8-18.3%) increase in cough and cold preparation sales for children under 15 years of age. Conclusions: The results of this study suggest that an increase in drugs sales was directly related to air pollutant concentration increases in the city of Rouen (France)

  15. Worldwide associations between air quality and health end-points: Are they meaningful?

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    Peter Wallner

    2014-10-01

    Full Text Available Objectives: The World Health Organization (WHO provides data on national indices of health, environment and economy. When we were asked, why air pollution is negatively correlated with cancer mortality, our first response (presumably the mortality data are not age-adjusted was not sufficient to explain the paradox. Material and Methods: A table including all-cause, cancer and childhood mortality, life expectancy, gross national product per person, smoking prevalence, physician density and particulate matter (PM10 per country (N = 193 was developed. For explorative purposes weighted cross-sectional multiple linear regressions models were built. Results: Air pollution is positively correlated with infant and overall mortality and negatively with life expectancy. This might not only depict a true causal effect of PM10 because air quality is also an indicator of a country’s prosperity and general state of environment. Cancer mortality is negatively correlated with PM10. However, this association turns positive when economic or health system indicators are controlled. Conclusions: The World Health Organization’s world-wide data sets demonstrate the large disparity of our world. A careful and professional approach is needed as interpretation is difficult, especially for lay persons. Therefore, with publicly available data WHO should also provide interpretation and guidance.

  16. A case of cerebral aneurysm rupture and subarachnoid hemorrhage associated with air travel

    Directory of Open Access Journals (Sweden)

    Cui V

    2014-04-01

    Full Text Available Victoria Cui,1,2 Timur Kouliev,1 Jason Wood1 1Beijing United Family Hospital, Beijing, People's Republic of China; 2Department of Biological Sciences, Columbia University, New York, NY, USA Abstract: During air travel, passengers are exposed to unique conditions such as rapid ascent and descent that can trigger significant physiological changes. In addition, the cabins of commercial aircraft are only partially pressured to 552–632 mmHg or the equivalent terrestrial altitudes of 1,500–2,500 m (5,000–8,000 feet above sea level. While studies in high-altitude medicine have shown that all individuals experience some degree of hypoxia, cerebral edema, and increased cerebral blood flow, the neurological effects that accompany these changes are otherwise poorly understood. In this study, we report a case of acute subarachnoid hemorrhage from a ruptured cerebral aneurysm associated with travel on commercial aircraft. We then review relevant cases of neurological incidents with possible air travel-related etiology and discuss the physiological factors that may have contributed to the patient's acute subarachnoid hemorrhage. In the future, this report may serve as reference for more detailed and conservative medical guidelines and recommendations regarding air travel. Keywords: high-altitude, cabin pressure, emergency, cerebral edema, triage, neurological

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

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    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

  18. [HTLV-I/II seroprevalence and risk factors associated with infection in a blood donor population in Córdoba, Argentina].

    Science.gov (United States)

    Gallego, S; Maturano, E; Recalde, A; Gastaldello, R; Sileoni, S; Bepre, H; Medeot, S

    2001-01-01

    In this study we have determined the seroprevalence of infections by HTLV-I/II in the blood donor population from the city of Córdoba. A total of 5476 blood donor sera were screened for HTLV-I/II antibodies by particle agglutination assay (PA) (SERODIA HTLV-I, Fujirebio INC, Tokyo, Japan). The reactive sera samples were confirmed by an "in house" indirect immunofluorescence assay (IFA). 14 out of 5476 blood donors studied were PA reactive and were confirmed positive by IFA, showing a prevalence of 0.26% (95% confidence interval: 0.126%-0.394%). All the positive samples, except one, met the criteria for HTLV-I. Although one HTLV-I infected donor was an intravenous drug abuser and two donors were born in highly endemic areas for HTLV-I, no specific risk factors were identified among the others. The demonstration that HTLV-I circulates in blood donor population of Córdoba, points out that the systematic screening of blood for HTLV-I/II antibodies must be implemented in the blood banks, in an attempt to prevent the spread of infections with this oncogenic virus in Argentina.

  19. Association between State Assistance on the Topic of Indoor Air Quality and School District-Level Policies That Promote Indoor Air Quality in Schools

    Science.gov (United States)

    Everett Jones, Sherry; Doroski, Brenda; Glick, Sherry

    2015-01-01

    Nationally representative data from the 2012 School Health Policies and Practices Study examined whether state assistance on indoor air quality (IAQ) was associated with district-level policies and practices related to IAQ and integrated pest management (IPM). Districts in states that provided assistance on IAQ were more likely than districts not…

  20. Do Variants in GSTs Modify the Association between Traffic Air Pollution and Asthma in Adolescence?

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    Gayan Bowatte

    2016-04-01

    Full Text Available Polymorphisms in genes involved in the oxidative stress response may partially explain the documented heterogeneous associations between traffic-related air pollution (TRAP exposure and asthma and allergies in children. We investigated whether the GSTT1, GSTM1 and GSTP1 gene polymorphisms modified the associations between TRAP exposure during the first year of life and asthma, wheeze and hay fever in adolescence. We used a birth cohort of 620 high risk infants from the Melbourne Atopy Cohort Study. TRAP exposure during the first year of life was defined as the cumulative length of major roads within 150 m of each participant’s residence during the first year of life. Wheeze, asthma and hay fever were measured at ages 12 (n = 370 and 18 (n = 434 years. The associations and interactions with glutathione S-transferases (GST s were investigated using regression models. Overall, there was no relationship between TRAP exposure during the first year of life and current asthma, wheeze and hay fever at ages 12 or 18 years. However, in GSTT1 null carriers, every 100 m increase in cumulative lengths of major road exposure during the first year of life was associated with a 2.31-fold increased risk of wheeze and a 2.15-fold increased risk of asthma at 12 years. TRAP is associated with some respiratory outcomes in carriers of genetic polymorphisms in oxidative stress metabolism genes.

  1. Cadenas productivas y disponibilidad de alimentos en Argentina Productive chains and food availability in Argentina

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    Malena Giai

    2010-06-01

    Full Text Available En abril de 2009 se conformó en la Asociación Argentina de Dietistas y Nutricionistas Dietistas el Grupo de Estudio sobre Soberanía Alimentaria, constituido por un grupo de Licenciados en Nutrición con interés en el tema. Como primer objetivo, el Grupo se propuso estudiar tres temas: "el Derecho a la Alimentación", "la Producción y Disponibilidad de alimentos en Argentina" y "la Canasta Básica de Alimentos". En el presente artículo se expone un resumen de los avances en el segundo tema mencionado.In April 2009, was formed in the Argentina Association of Dieticians and Nutritionists Dietitians the Study Group on Food Sovereignty, established by a group of graduates in nutrition with interest in the subject. As a first objective, the Group was to examine three issues: "The Right to Food", "Production and Availability of food in Argentina" and "Basic Food Basket." This article is a summary of progress on the second topic mentioned.

  2. The air quality impacts of road closures associated with the 2004 Democratic National Convention in Boston

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    Clougherty Jane E

    2006-05-01

    Full Text Available Abstract Background The Democratic National Convention (DNC in Boston, Massachusetts in 2004 provided an opportunity to evaluate the impacts of a localized and short-term but potentially significant change in traffic patterns on air quality, and to determine the optimal monitoring approach to address events of this nature. It was anticipated that the road closures associated with the DNC would both influence the overall air pollution level and the distribution of concentrations across the city, through shifts in traffic patterns. Methods To capture these effects, we placed passive nitrogen dioxide badges at 40 sites around metropolitan Boston before, during, and after the DNC, with the goal of capturing the array of hypothesized impacts. In addition, we continuously measured elemental carbon at three sites, and gathered continuous air pollution data from US EPA fixed-site monitors and traffic count data from the Massachusetts Highway Department. Results There were significant reductions in traffic volume on the highway with closures north of Boston, with relatively little change along other highways, indicating a more isolated traffic reduction rather than an across-the-board decrease. For our nitrogen dioxide samples, while there was a relatively small change in mean concentrations, there was significant heterogeneity across sites, which corresponded with our a priori classifications of road segments. The median ratio of nitrogen dioxide concentrations during the DNC relative to non-DNC sampling periods was 0.58 at sites with hypothesized traffic reductions, versus 0.88 for sites with no changes hypothesized and 1.15 for sites with hypothesized traffic increases. Continuous monitors measured slightly lower concentrations of elemental carbon and nitrogen dioxide during road closure periods at monitors proximate to closed highway segments, but not for PM2.5 or further from major highways. Conclusion We conclude that there was a small but

  3. Primer registro para la Argentina de una especie de chicharrita, Ctenarytaina spatulata (Hemiptera: Psyllidae, en plantaciones de eucalipto en Entre Ríos New record in Argentina of a species of jumping plant-lice, Ctenarytaina spatulata (Hemiptera: Psyllidae, in eucalypt plantations from Entre Ríos

    Directory of Open Access Journals (Sweden)

    Juan P. R. Bouvet

    2008-06-01

    Full Text Available Se menciona por primera vez para Argentina la especie Ctenarytaina spatulata Taylor, asociada a plantaciones de eucalipto. Este nuevo registro se obtuvo en la Provincia de Entre Ríos, Argentina.Ctenarytaina spatulata Taylor, a species associated with eucalypt plantations, is recorded for the first time from Entre Ríos, Argentina.

  4. Case study - Argentina

    International Nuclear Information System (INIS)

    Antecedents and experience of nuclear activities in Argentina; the Atomic Energy Commission (CNEA). First development and research activities. Research reactors and radioisotopes plants. Health physics and safety regulations. - Feasibility studies for the first nuclear power plant. Awarding the first plant CNA I (Atucha I). Relevant data related to the different project stages. Plant performance. - Feasibility study for the second nuclear power plant. Awarding the second plant CNE (Central Nuclear Embalse). Relevant data related to established targets. Differences compared with the first station targets. Local participation. Plant performance. (orig./GL)

  5. 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

  6. Variation in summer surface air temperature over Northeast Asia and its associated circulation anomalies

    Science.gov (United States)

    Chen, Wei; Hong, Xiaowei; Lu, Riyu; Jin, Aifen; Jin, Shizhu; Nam, Jae-Cheol; Shin, Jin-Ho; Goo, Tae-Young; Kim, Baek-Jo

    2016-01-01

    This study investigates the interannual variation of summer surface air temperature over Northeast Asia (NEA) and its associated circulation anomalies. Two leading modes for the temperature variability over NEA are obtained by EOF analysis. The first EOF mode is characterized by a homogeneous temperature anomaly over NEA and therefore is called the NEA mode. This anomaly extends from southeast of Lake Baikal to Japan, with a central area in Northeast China. The second EOF mode is characterized by a seesaw pattern, showing a contrasting distribution between East Asia (specifically including the Changbai Mountains in Northeast China, Korea, and Japan) and north of this region. This mode is named the East Asia (EA) mode. Both modes contribute equivalently to the temperature variability in EA. The two leading modes are associated with different circulation anomalies. A warm NEA mode is associated with a positive geopotential height anomaly over NEA and thus a weakened upper-tropospheric westerly jet. On the other hand, a warm EA mode is related to a positive height anomaly over EA and a northward displaced jet. In addition, the NEA mode tends to be related to the Eurasian teleconnection pattern, while the EA mode is associated with the East Asia-Pacific/Pacific-Japan pattern.

  7. Genetics and biology of Anastrepha fraterculus: research supporting the use of the sterile insect technique (SIT) to control this pest in Argentina

    OpenAIRE

    Cladera, Jorge L.; Vilardi, Juan C.; Juri, Marianela; Paulin, Laura E; Giardini, M Cecilia; Gómez Cendra, Paula V; Segura, Diego F.; Lanzavecchia, Silvia B

    2014-01-01

    Two species of true fruit flies (taxonomic family Tephritidae) are considered pests of fruit and vegetable production in Argentina: the cosmopolitan Mediterranean fruit fly (Ceratitis capitata Wiedemann) and the new world South American fruit fly (Anastrepha fraterculus Wiedemann). The distribution of these two species in Argentina overlaps north of the capital, Buenos Aires. Regarding the control of these two pests, the varied geographical fruit producing regions in Argentina are in differen...

  8. Activities with Argentina

    International Nuclear Information System (INIS)

    In 1989, the US Department of Energy (DOE) responded to the need to redirect resources from weapons production to environmental restoration and waste management by establishing the Office of Environmental Management (EM) and delegated to this office the responsibility of cleaning up the US nuclear weapons complex. Now in its eight year, EM's mission has three central facets: (1) to assess, remediate, and monitor contaminated sites and facilities; (2) to store, treat, and dispose of waste from past and current operations; and (3) to develop and implement innovative technologies for environmental cleanup. To this end, EM has established domestic and international cooperative technology development programs, including one with the Republic of Argentina. Cooperating with Argentine scientific institutes and industries meets US cleanup objectives by: (1) identifying and accessing Argentine EM-related technologies, thereby leveraging investments and providing cost-savings; (2) improving access to technical information, scientific expertise, and technologies applicable to EM needs; and (3) fostering the development of innovative environmental technologies by increasing US private sector opportunities in Argentina in EM-related areas

  9. Association between air pollution and general outpatient clinic consultations for upper respiratory tract infections in Hong Kong.

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    Wilson W S Tam

    Full Text Available BACKGROUND AND OBJECTIVES: Many studies have shown the adverse effects of air pollution on respiratory health, but few have examined the effects of air pollution on service utilisation in the primary care setting. The aim of this study was to examine the association between air pollution and the daily number of consultations due to upper respiratory tract infections (URTIs in general outpatient clinics (GOPCs in Hong Kong. METHODS: Daily data on the numbers of consultations due to URTIs in GOPCs, the concentrations of major air pollutants, and the mean values of metrological variables were retrospectively collected over a 3-year period (2008-2010, inclusive. Generalised additive models were constructed to examine the association between air pollution and the daily number of consultations, and to derive the relative risks and 95% confidence intervals (95% CI of GOPC consultations for a unit increase in the concentrations of air pollutants. RESULTS: The mean daily consultations due to URTIs in GOPCs ranged from 68.4 to 253.0 over the study period. The summary relative risks (and 95% CI of daily consultations in all GOPCs for the air pollutants PM10, NO2, O3, and SO2 were 1.005 (1.002, 1.009, 1.010 (1.006, 1.013, 1.009 (1.006, 1.012, and 1.004 (1.000, 1.008 respectively, per 10 µg/m(3 increase in the concentration of each pollutant. CONCLUSION: Significant associations were found between the daily number of consultations due to URTIs in GOPCs and the concentrations of air pollutants, implying that air pollution incurs a substantial morbidity and increases the burden of primary health care services.

  10. Association between air pollution and daily mortality and hospital admission due to ischaemic heart diseases in Hong Kong

    Science.gov (United States)

    Tam, Wilson Wai San; Wong, Tze Wai; Wong, Andromeda H. S.

    2015-11-01

    Ischaemic heart disease (IHD) is one of the leading causes of death worldwide. The effects of air pollution on IHD mortalities have been widely reported. Fewer studies focus on IHD morbidities and PM2.5, especially in Asia. To explore the associations between short-term exposure to air pollution and morbidities and mortalities from IHD, we conducted a time series study using a generalized additive model that regressed the daily numbers of IHD mortalities and hospital admissions on daily mean concentrations of the following air pollutants: nitrogen dioxide (NO2), particulate matter with an aerodynamic diameter less than 10 μm (PM10), particulate matter with an aerodynamic diameter less than 2.5 μm (PM2.5), ozone (O3), and sulfur dioxide (SO2). The relative risks (RR) of IHD deaths and hospital admissions per 10 μg/m3 increase in the concentration of each air pollutant were derived in single pollutant models. Multipollutant models were also constructed to estimate their RRs controlling for other pollutants. Significant RRs were observed for all five air pollutants, ranging from 1.008 to 1.032 per 10 μg/m3 increase in air pollutant concentrations for IHD mortality and from 1.006 to 1.021 per 10 μg/m3 for hospital admissions for IHD. In the multipollutant model, only NO2 remained significant for IHD mortality while SO2 and PM2.5 was significantly associated with hospital admissions. This study provides additional evidence that mortalities and hospital admissions for IHD are significantly associated with air pollution. However, we cannot attribute these health effects to a specific air pollutant, owing to high collinearity between some air pollutants.

  11. Mortality, Severe Acute Respiratory Infection, and Influenza-Like Illness Associated with Influenza A(H1N1)pdm09 in Argentina, 2009

    Science.gov (United States)

    Azziz-Baumgartner, Eduardo; Cabrera, Ana María; Chang, Loretta; Calli, Rogelio; Kusznierz, Gabriela; Baez, Clarisa; Yedlin, Pablo; Zamora, Ana María; Cuezzo, Romina; Sarrouf, Elena Beatriz; Uboldi, Andrea; Herrmann, Juan; Zerbini, Elsa; Uez, Osvaldo; Rico Cordeiro, Pedro Osvaldo; Chavez, Pollyanna; Han, George; Antman, Julián; Coronado, Fatima; Bresee, Joseph; Kosacoff, Marina; Widdowson, Marc-Alain; Echenique, Horacio

    2012-01-01

    Introduction While there is much information about the burden of influenza A(H1N1)pdm09 in North America, little data exist on its burden in South America. Methods During April to December 2009, we actively searched for persons with severe acute respiratory infection and influenza-like illness (ILI) in three sentinel cities. A proportion of case-patients provided swabs for influenza testing. We estimated the number of case-patients that would have tested positive for influenza by multiplying the number of untested case-patients by the proportion who tested positive. We estimated rates by dividing the estimated number of case-patients by the census population after adjusting for the proportion of case-patients with missing illness onset information and ILI case-patients who visited physicians multiple times for one illness event. Results We estimated that the influenza A(H1N1)pdm09 mortality rate per 100,000 person-years (py) ranged from 1.5 among persons aged 5–44 years to 5.6 among persons aged ≥65 years. A(H1N1)pdm09 hospitalization rates per 100,000 py ranged between 26.9 among children aged <5 years to 41.8 among persons aged ≥65 years. Influenza A(H1N1)pdm09 ILI rates per 100 py ranged between 1.6 among children aged <5 to 17.1 among persons aged 45–64 years. While 9 (53%) of 17 influenza A(H1N1)pdm09 decedents with available data had obesity and 7 (17%) of 40 had diabetes, less than 4% of surviving influenza A(H1N1)pdm09 case-patients had these pre-existing conditions (p≤0.001). Conclusion Influenza A(H1N1)pdm09 caused a similar burden of disease in Argentina as in other countries. Such disease burden suggests the potential value of timely influenza vaccinations. PMID:23118877

  12. Mortality, severe acute respiratory infection, and influenza-like illness associated with influenza A(H1N1pdm09 in Argentina, 2009.

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    Eduardo Azziz-Baumgartner

    Full Text Available INTRODUCTION: While there is much information about the burden of influenza A(H1N1pdm09 in North America, little data exist on its burden in South America. METHODS: During April to December 2009, we actively searched for persons with severe acute respiratory infection and influenza-like illness (ILI in three sentinel cities. A proportion of case-patients provided swabs for influenza testing. We estimated the number of case-patients that would have tested positive for influenza by multiplying the number of untested case-patients by the proportion who tested positive. We estimated rates by dividing the estimated number of case-patients by the census population after adjusting for the proportion of case-patients with missing illness onset information and ILI case-patients who visited physicians multiple times for one illness event. RESULTS: We estimated that the influenza A(H1N1pdm09 mortality rate per 100,000 person-years (py ranged from 1.5 among persons aged 5-44 years to 5.6 among persons aged ≥ 65 years. A(H1N1pdm09 hospitalization rates per 100,000 py ranged between 26.9 among children aged <5 years to 41.8 among persons aged ≥ 65 years. Influenza A(H1N1pdm09 ILI rates per 100 py ranged between 1.6 among children aged <5 to 17.1 among persons aged 45-64 years. While 9 (53% of 17 influenza A(H1N1pdm09 decedents with available data had obesity and 7 (17% of 40 had diabetes, less than 4% of surviving influenza A(H1N1pdm09 case-patients had these pre-existing conditions (p ≤ 0.001. CONCLUSION: Influenza A(H1N1pdm09 caused a similar burden of disease in Argentina as in other countries. Such disease burden suggests the potential value of timely influenza vaccinations.

  13. Influence of air quality model resolution on uncertainty associated with health impacts

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    T. M. Thompson

    2012-06-01

    Full Text Available We use regional air quality modeling to evaluate the impact of model resolution on uncertainty associated with the human health benefits resulting from proposed air quality regulations. Using a regional photochemical model (CAMx, we ran a modeling episode with meteorological inputs representing conditions as they occurred during August through September 2006, and two emissions inventories (a 2006 base case and a 2018 proposed control scenario, both for Houston, Texas at 36, 12, 4 and 2 km resolution. The base case model performance was evaluated for each resolution against daily maximum 8-h averaged ozone measured at monitoring stations. Results from each resolution were more similar to each other than they were to measured values. Population-weighted ozone concentrations were calculated for each resolution and applied to concentration response functions (with 95% confidence intervals to estimate the health impacts of modeled ozone reduction from the base case to the control scenario. We found that estimated avoided mortalities were not significantly different between 2, 4 and 12 km resolution runs, but 36 km resolution may over-predict some potential health impacts. Given the cost/benefit analysis requirements of the Clean Air Act, the uncertainty associated with human health impacts and therefore the results reported in this study, we conclude that health impacts calculated from population weighted ozone concentrations obtained using regional photochemical models at 36 km resolution fall within the range of values obtained using fine (12 km or finer resolution modeling. However, in some cases, 36 km resolution may not be fine enough to statistically replicate the results achieved using 2 and 4 km resolution. On average, when modeling at 36 km resolution, 7 deaths per ozone month were avoided because of ozone reductions resulting from the proposed emissions reductions (95% confidence interval was 2–9. When modeling at 2, 4 or 12 km finer

  14. Influence of air quality model resolution on uncertainty associated with health impacts

    Directory of Open Access Journals (Sweden)

    T. M. Thompson

    2012-10-01

    Full Text Available We use regional air quality modeling to evaluate the impact of model resolution on uncertainty associated with the human health benefits resulting from proposed air quality regulations. Using a regional photochemical model (CAMx, we ran a modeling episode with meteorological inputs simulating conditions as they occurred during August through September 2006 (a period representative of conditions leading to high ozone, and two emissions inventories (a 2006 base case and a 2018 proposed control scenario, both for Houston, Texas at 36, 12, 4 and 2 km resolution. The base case model performance was evaluated for each resolution against daily maximum 8-h averaged ozone measured at monitoring stations. Results from each resolution were more similar to each other than they were to measured values. Population-weighted ozone concentrations were calculated for each resolution and applied to concentration response functions (with 95% confidence intervals to estimate the health impacts of modeled ozone reduction from the base case to the control scenario. We found that estimated avoided mortalities were not significantly different between the 2, 4 and 12 km resolution runs, but the 36 km resolution may over-predict some potential health impacts. Given the cost/benefit analysis requirements motivated by Executive Order 12866 as it applies to the Clean Air Act, the uncertainty associated with human health impacts and therefore the results reported in this study, we conclude that health impacts calculated from population weighted ozone concentrations obtained using regional photochemical models at 36 km resolution fall within the range of values obtained using fine (12 km or finer resolution modeling. However, in some cases, 36 km resolution may not be fine enough to statistically replicate the results achieved using 2, 4 or 12 km resolution. On average, when modeling at 36 km resolution, an estimated 5 deaths per week during the May through September ozone

  15. The use of chained two-point clusters for the examination of associations of air pollution with health conditions

    OpenAIRE

    Mieczysław Szyszkowicz; Wesley S. Burr

    2016-01-01

    Objectives: There are a few accepted and intensively applied statistical methods used to study associations of ambient air pollution with health conditions. Among the most popular methods applied to assess short term air health effects are case-crossover (using events) and time-series methodologies (using counts). A few other techniques for studying counts of events have been proposed, including the Generalized Linear Mixed Models (GLMM). One suggested GLMM technique uses cluster structures b...

  16. Associations between air pollution and socioeconomic characteristics, ethnicity and age profile of neighbourhoods in England and the Netherlands

    International Nuclear Information System (INIS)

    Air pollution levels are generally believed to be higher in deprived areas but associations are complex especially between sensitive population subgroups. We explore air pollution inequalities at national, regional and city level in England and the Netherlands comparing particulate matter (PM10) and nitrogen dioxide (NO2) concentrations and publicly available population characteristics (deprivation, ethnicity, proportion of children and elderly). We saw higher concentrations in the most deprived 20% of neighbourhoods in England (1.5 μg/m3 higher PM10 and 4.4 μg/m3 NO2). Concentrations in both countries were higher in neighbourhoods with >20% non-White (England: 3.0 μg/m3 higher PM10 and 10.1 μg/m3 NO2; the Netherlands: 1.1 μg/m3 higher PM10 and 4.5 μg/m3 NO2) after adjustment for urbanisation and other variables. Associations for some areas differed from the national results. Air pollution inequalities were mainly an urban problem suggesting measures to reduce environmental air pollution inequality should include a focus on city transport. - Highlights: • Air pollution inequalities are believed to vary between subpopulations. • We explore this across two European countries at different geographical levels. • We found that air pollution inequalities are largely an urban problem. • Ethnically diverse neighbourhoods have the highest air pollution levels. • Associations vary across two countries that might be thought to be quite similar. - Air pollution inequalities are largely an urban problem and associations with deprivation and ethnicity vary even across two European countries that might be thought to be quite similar

  17. Association between Long-Term Exposure to Traffic-Related Air Pollution and Subclinical Atherosclerosis: The REGICOR Study

    OpenAIRE

    Rivera, Marcela; Basagaña, Xavier; Aguilera, Immaculada; Foraster, María; Agis, David; Groot, Eric de; Pérez, Laura; Méndez, Michelle A.; Bouso, Laura; TARGA Jaume; Ramos Blanes, Rafel; Sala, Joan; Marrugat, Jaume; Elosua, Roberto; Künzli, Nino

    2012-01-01

    Background: Epidemiological evidence of the effects of long-term exposure to air pollu tion on the chronic processes of athero genesis is limited. Objective: We investigated the association of long-term exposure to traffic-related air pollu tion with subclinical atherosclerosis, measured by carotid intima media thickness (IMT) and ankle–brachial index (ABI). Methods: We performed a cross-sectional analysis using data collected during the reexamination (2007–2010) of 2,780 participants in the...

  18. Sátira, caricatura y parodia en la Argentina de fines del siglo XIX. Un caso paradigmático: el periódico "Don Quijote" (1884-1903, de Buenos Aires

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    Lic. María Ximena Avila

    2000-01-01

    Full Text Available estudio se fundamenta en una investigación histórico-periodística que da cuenta de las condiciones socio-culturales, las luchas políticas, la participación de los sujetos sociales en la historia argentina de 1890. El periódico Don Quijote es un órgano partidario opositor al gobierno nacional, de un grupo político "el radicalismo" que, a partir de 1890, surge como voz disidente que intentaba proponerse como una alternativa a la hegemonía de los partidos conservadores.

  19. Efecto del sistema de manejo de suelo en el desarrollo de raices, absorción de agua y productividad en una rotación soja-trigo en la provincia de Buenos Aires, Argentina

    OpenAIRE

    Barrios, Mónica Beatriz

    2010-01-01

    La degradación de los suelos se ha propagado en el mundo a un ritmo acelerado en los últimos 50 años. Es de esperar que la presión sobre el recurso suelo sea cada vez mayor, teniendo en cuenta el sostenido aumento de la población mundial. Actualmente en Argentina tiene lugar un proceso de reemplazo de sistemas de producción tradicionales por sistemas de producción de "commodities" a gran escala. Ecosistemas marginales están siendo incorporados a la producción, dando como resultado la fragi...

  20. Segio Federowsky. El medioambiente no le importa a nadie. Bestialidades ecológicas en la Argentina: del Riachuelo a las Papeleras : Editorial Planeta, Buenos Aires, 2007, 272 páginas

    OpenAIRE

    Tram[p]as de la Comunicación y la Cultura

    2008-01-01

    Desde un enfoque más genérico y no abocado exclusivamente a sus vínculos con el proceso comunicacional, el biólogo y periodista Sergio Federovisky publicó El medio ambiente no le importa a nadie. Bestialidades ecológicas en la Argentina: del Riachuelo a las Papeleras. Tras un prólogo del jurista Daniel Sabsay, titular de la Fundación Ambiente y Recursos Naturales (FARN), el autor se interroga: “¿Cómo es posible que todo el mundo diga que hay que cuidar el medio ambiente, que hay que proteger ...

  1. Operating practical experience at Argentina

    International Nuclear Information System (INIS)

    Operating experiences of Atucha-1 and Embalse Nuclear Power Plants were discussed in this work. The technical and economic aspects, such as reliability, availability, personnel training, operating costs, prices and market, which exercise influence upon Argentina nuclear energy policy, mainly on the power electric generation by nuclear power plants were considered. Finally the current status of the nucleoelectric sector in Argentina and forecasting were analysed

  2. Association between long-term air pollution and increased blood pressure and hypertension in China.

    Science.gov (United States)

    Dong, Guang-Hui; Qian, Zhengmin Min; Xaverius, Pamela K; Trevathan, Edwin; Maalouf, Salwa; Parker, Jamaal; Yang, Laiji; Liu, Miao-Miao; Wang, Da; Ren, Wan-Hui; Ma, Wenjun; Wang, Jing; Zelicoff, Alan; Fu, Qiang; Simckes, Maayan

    2013-03-01

    Several studies have investigated the short-term effects of ambient air pollutants in the development of high blood pressure and hypertension. However, little information exists regarding the health effects of long-term exposure. To investigate the association between residential long-term exposure to air pollution and blood pressure and hypertension, we studied 24 845 Chinese adults in 11 districts of 3 northeastern cities from 2009 to 2010. Three-year average concentration of particles with an aerodynamic diameter ≤10 µm (PM(10)), sulfur dioxide (SO(2)), nitrogen dioxides (NO(2)), and ozone (O(3)) were calculated from monitoring stations in the 11 districts. We used generalized additive models and 2-level logistic regressions models to examine the health effects. The results showed that the odds ratio for hypertension increased by 1.12 (95% confidence interval [CI], 1.08-1.16) per 19 μg/m(3) increase in PM(10), 1.11 (95% CI, 1.04-1.18) per 20 μg/m(3) increase in SO(2), and 1.13 (95% CI, 1.06-1.20) per 22 μg/m(3) increase in O(3). The estimated increases in mean systolic and diastolic blood pressure were 0.87 mm Hg (95% CI, 0.48-1.27) and 0.32 mm Hg (95% CI, 0.08-0.56) per 19 μg/m(3) interquartile increase in PM(10), 0.80 mm Hg (95% CI, 0.46-1.14) and 0.31 mm Hg (95% CI, 0.10-0.51) per 20 μg/m(3) interquartile increase in SO(2), and 0.73 mm Hg (95% CI, 0.35-1.11) and 0.37 mm Hg (95% CI, 0.14-0.61) per 22 μg/m(3) interquartile increase in O(3). These associations were only statistically significant in men. In conclusion, long-term exposure to PM(10), SO(2), and O(3) was associated with increased arterial blood pressure and hypertension in the study population.

  3. Nuevos registros de Habrobracon hebetor (Hymenoptera: Braconidae en la Argentina

    Directory of Open Access Journals (Sweden)

    Juan José MARTÍNEZ

    2009-01-01

    Full Text Available Se proveen nuevos registros de Habrobracon hebetor (Say de Choele Choel, Río Negro, y de la Ciudad Autónoma de Buenos Aires, Argentina. Parte de los ejemplares analizados fueron criados a partir de larvas de Plodia interpunctella (Hübner (Lepidoptera: Pyralidae sobre nueces almacenadas. Adicionalmente se provee una diagnosis ilustrada de la única especie de Habrobracon presente en el país.

  4. Las Iglesias Cristianas Reformadas en Argentina: una historia reciente

    OpenAIRE

    Lértora-Mendoza, C.A. (Celina A.)

    2015-01-01

    The history of evangelical Christianity in Argentina is as old as the country itself. Several Reformed communities settled in Buenos Aires and various cities and towns of the interior; this history, recorded through numerous studies, shows different views and facets of the complex and nuanced historical reality. Concerning recent decades, several historiographical problems mentioned in the introduction can be perceived. The work is divided into the following parts. First, the history of ev...

  5. gobierno dividido en Argentina

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    María Elisa Alonso García

    2008-01-01

    Full Text Available Este artículo es una reflexión sobre el gobierno dividido en Argentina, y un análisis sobre las consecuencias negativas que tiene el binomio presidencialismo –multipartidismo para la gobernabilidad y el desarrollo institucional del país. El estudio del caso argentino permite comprobar que el gobierno en minoría no constituye un obstáculo para el desarrollo institucional, y que los problemas que de él se derivan, como el bloqueo legislativo y el conflicto institucional pueden solventarse, evitando la crisis. En este sentido, se analiza el papel jugado por los partidos provinciales, que han sido determinantes para evitar los problemas vinculados con el gobierno dividido

  6. Nuevos registros de Habrobracon hebetor (Hymenoptera: Braconidae en la Argentina New records of Habrobracon hebetor (Hymenoptera: Braconidae in Argentina

    Directory of Open Access Journals (Sweden)

    Juan José Martínez

    2009-12-01

    Full Text Available Se proveen nuevos registros de Habrobracon hebetor (Say de Choele Choel, Río Negro, y de la Ciudad Autónoma de Buenos Aires, Argentina. Parte de los ejemplares analizados fueron criados a partir de larvas de Plodia interpunctella (Hübner (Lepidoptera: Pyralidae sobre nueces almacenadas. Adicionalmente se provee una diagnosis ilustrada de la única especie de Habrobracon presente en el país.New records of Habrobracon hebetor (Say are reported from Choele Choel, Río Negro and Ciudad Autónoma de Buenos Aires, Argentina. Some of the specimens examined were reared from larvae of Plodia interpunctella (Hübner (Lepidoptera: Pyralidae on stored nuts. Additionally, an illustrated diagnosis of Habrobracon hebetor is provided.

  7. The association between ambient air pollution and daily mortality in Beijing after the 2008 olympics: a time series study.

    Directory of Open Access Journals (Sweden)

    Yang Yang

    Full Text Available In recent decades, ambient air pollution has been an important public health issue in Beijing, but little is known about air pollution and health effects after the 2008 Beijing Olympics. We conduct a time-series analysis to evaluate associations between daily mortality (nonaccidental, cardiovascular and respiratory mortality and the major air pollutants (carbon monoxide, nitrogen dioxide and particulate matter less than 10 µm in aerodynamic diameter in Beijing during the two years (2009,2010 after the 2008 Beijing Olympics. We used generalized additive model to analyze relationship between daily mortality and air pollution. In single air pollutant model with two-day moving average concentrations of the air pollutants, increase in their interquartile range (IQR associated with percent increase in nonaccidental mortality, 2.55 percent [95% confidence interval (CI: 1.99, 3.11] for CO, 2.54 percent (95% CI: 2.00, 3.08 for NO2 and 1.80 percent (95% CI: 1.21, 2.40 for PM10, respectively; increases in the IQR of air pollutant concentrations associated with percent increase in cardiovascular mortality, 2.88 percent (95% CI: 2.10,3.65 for CO, 2.63 percent (95% CI: 1.87, 3.39 for NO2 and 1.72 percent (95% CI: 0.88, 2.55 for PM10, respectively; and increase in IQR of air pollutant concentrations associated with respiratory mortality, 2.39 percent (95% CI: 0.68, 4.09 for CO, 1.79 percent (95% CI: 0.11, 3.47 for NO2 and 2.07 percent (95% CI: 0.21, 3.92 for PM10, respectively. We used the principal component analysis to avoid collinearity of varied air pollutants. In addition, the association stratified by sex and age was also examined. Ambient air pollution remained a significant contributor to nonaccidental and cardiopulmonary mortalities in Beijing during 2009,2010.

  8. 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.

  9. AIRS retrieved CO2 and its association with climatic parameters over India during 2004-2011.

    Science.gov (United States)

    Kumar, K Ravi; Revadekar, J V; Tiwari, Yogesh K

    2014-04-01

    Atmospheric Infrared Sounder (AIRS) retrieved mid-tropospheric Carbon Dioxide (CO2) have been used to study the variability and its association with the climatic parameters over India during 2004 to 2011. The study also aims in understanding transport of CO2 from surface to mid-troposphere over India. The annual cycle of mid-tropospheric CO2 shows gradual increase in concentration from January till the month of May at the rate ~0.6 ppm/month. It decreases continuously in summer monsoon (JJAS) at the same rate during which strong westerlies persists over the region. A slight increase is seen during winter monsoon (DJF). Being a greenhouse gas, annual cycle of CO2 show good resemblance with annual cycle of surface air temperature with correlation coefficient (CC) of +0.8. Annual cycle of vertical velocity indicate inverse pattern compared to annual cycle of CO2. High values of mid-tropospheric CO2 correspond to upward wind, while low values of mid-tropospheric CO2 correspond to downward wind. In addition to vertical motion, zonal winds are also contributing towards the transport of CO2 from surface to mid-troposphere. Vegetation as it absorbs CO2 at surface level, show inverse annual cycle to that of annual cycle of CO2 (CC-0.64). Seasonal variation of rainfall-CO2 shows similarities with seasonal variation of NDVI-CO2. However, the use of long period data sets for CO2 at the surface and at the mid-troposphere will be an advantage to confirm these results.

  10. 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

  11. An association between air pollution and daily outpatient visits for respiratory disease in a heavy industry area.

    Directory of Open Access Journals (Sweden)

    Kuo-Ying Wang

    Full Text Available In this work we used daily outpatient data from the Landseed Hospital in a heavily industrial area in northern Taiwan to study the associations between daily outpatient visits and air pollution in the context of a heavily polluted atmospheric environment in Chung-Li area during the period 2007-2011. We test the normality of each data set, control for the confounding factors, and calculate correlation coefficient between the outpatient visits and air pollution and meteorology, and use multiple linear regression analysis to seek significance of these associations. Our results show that temperature and relative humidity tend to be negatively associated with respiratory diseases. NO and [Formula: see text] are two main air pollutants that are positively associated with respiratory diseases, followed by [Formula: see text], [Formula: see text], [Formula: see text], CO, and [Formula: see text]. Young outpatients (age 0-15 years are most sensitive to changing air pollution and meteorology factors, followed by the eldest (age [Formula: see text]66 years and age 16-65 years of outpatients. Outpatients for COPD diseases are most sensitive to air pollution and meteorology factors, followed by allergic rhinitis, asthma, and pneumonia diseases. In the context of sex difference to air pollution and meteorological factors, male outpatients are more sensitive than female outpatients in the 16-65 age groups, while female outpatients are more sensitive than male outpatients in the young 0-15 age groups and in the eldest age groups. In total, female outpatients are more sensitive to air pollution and meteorological factors than male outpatients.

  12. Carmody, Patricio Mateo. Buscando consensos al fin del mundo: hacia una política exterior Argentina con consensos (2015-2027) : Buenos Aires, Consejo Argentino para las Relaciones Internacionales (CARI), Buenos Aires, 2015, 237 páginas

    OpenAIRE

    Riva, Macarena

    2015-01-01

    Esta publicación es una continuación del trabajo “Política exterior al fin del mundo. Argentina, Brasil y Chile en el tiempo democrático (1983-2010)”, en el cual el autor analiza los niveles de consenso en materia de política exterior de estos tres países latinoamericanos, concluyendo que, mientras en Brasil y en Chile existe cierto grado de consenso, en Argentina hay “desacuerdos básicos” en su política internacional. Ante tal panorama, Carmody se plantea si es posible diseñar una política e...

  13. - 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

  14. Yugoslav teachers in Argentina 1939-1944

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    Stefanović-Banović Milesa

    2014-01-01

    Full Text Available In this paper we present reports of Yugoslav teachers who held classes to immigrants in Argentina 1939-1944, organized by the government of Kingdom of Yugoslavia. Teachers’ reports to Yugoslav Embassy in Buenos Aires testify of Kingdom of Yugoslavia efforts to oppose assimilation and promote and strengthen “Yugoslav national unity”. The reports also describe general social circumstances of Yugoslav immigrants, show various details from their everyday life and contain valuable data on numerous political, economic, social and cultural problems of this diaspora in Argentina and their relationship with motherland. We believe that archive materials presented in this paper opens numerous questions which could be topics of separate researches. Some of them could be the following: To which extent the teachers’ reports represented the actual situation and to which they were shaped to match policy and expectations of Kingdom of Yugoslavia? What was the actual influence of teachers to spreading the “national unity” among immigrants? Have their work left trace in Yugoslav diaspora and in which way? Beside all of the open issues, it is certain that teachers’ reports contain valuable data on immigrants’ everyday life, curriculum, schooling conditions, relationship with motherland, etc. [Projekat Ministarstva nauke Republike Srbije, br. 47016: Interdisciplinarno istraživanje kulturnog i jezičkog nasleđa Srbije. Izrada multimedijalnog internet portala "Pojmovnik srpske kulture"

  15. 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.

  16. Cryptococcus gattii in urban trees from cities in North-eastern Argentina.

    Science.gov (United States)

    Mazza, Mariana; Refojo, Nicolás; Bosco-Borgeat, María Eugenia; Taverna, Constanza Giselle; Trovero, Alicia Cristina; Rogé, Ariel; Davel, Graciela

    2013-11-01

    In the city of Buenos Aires, Argentina, Cryptococcus gattii genotype AFLP4/VGI was found to be associated with decaying wood in hollows of different tree species. The aim of this study was to investigate the presence of C. gattii in the environment of riverside cities of the river Paraná, and to describe its serotypes and molecular types. Five hundred samples were collected in 50 parks by swabbing tree hollows. The samples were inoculated on caffeic acid agar supplemented with chloramphenicol, and incubated at 28 °C for 1 week with a daily observation. The isolates were identified by conventional methods. The serotype was determined by slide agglutination with specific antisera. Molecular typing was carried out by PCR-RFLP of the URA5 gene. Four isolates of C. gattii were recovered: Cryptococcus gattii serotype B, genotype AFLP4/VGI, isolated from Eucalyptus sp. in the city of Rosario and from Grevillea robusta in the city of La Paz; and C. gattii serotype C, genotype AFLP5/VGIII, isolated from two different Tipuana tipu trees in the city of Resistencia. Here, we report for the first time the isolation of C. gattii serotype C, genotype AFLP5/VGIII, from environmental samples in Argentina.

  17. Prevalence and Correlates of Lifetime Suicide Attempts Among Transgender Persons in Argentina.

    Science.gov (United States)

    Marshall, Brandon D L; Socías, María Eugenia; Kerr, Thomas; Zalazar, Virginia; Sued, Omar; Arístegui, Inés

    2016-07-01

    This study examined the lifetime prevalence and correlates of attempted suicide among transgender persons in Argentina. Data were derived from a nation-wide, cross-sectional survey conducted in 2013. We assessed individual, social, and structural correlates of reporting a history of attempting suicide using logistic regression. Among 482 participants, the median age was 30, 91% identified as transwomen, and 32% resided in the Buenos Aires metropolitan area. A lifetime suicide attempt was reported by 159 (33%), among whom the median age at first attempt was 17. In a multivariate model, internalized stigma was positively associated with a history of suicidal behavior, while participants with stable housing had reduced odds of prior suicide attempt(s). These findings suggest that reducing stigma and mitigating structural vulnerabilities (through, for example, the enactment and enforcement of laws that prohibit discrimination based on gender identity to ensure equitable access to housing) could be effective targets for intervention to reduce suicide attempts among transgender individuals in Argentina. PMID:26566683

  18. Burnout, Perceived Stress, and Depression among Cardiology Residents in Argentina

    Science.gov (United States)

    Waldman, Silvina V.; Diez, Juan Cruz Lopez; Arazi, Hernan Cohen; Linetzky, Bruno; Guinjoan, Salvador; Grancelli, Hugo

    2009-01-01

    Objective: Because medical residency is a stressful time for training physicians, placing residents at increased risk for psychological distress, the authors studied the prevalence of burnout, perceived stress, and depression in cardiology residents in Argentina and examined the association between sociodemographic characteristics and these…

  19. 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

  20. Estratigrafía, facies y evolución depositacional de la Formación Sauce Grande (Carbonífero Superior: Cuenca Sauce Grande, Sierras Australes, Buenos Aires, Argentina Stratigraphy, facies and depositional evolution of the Sauce Grande Formation (Upper Carboniferous: Sauce Grande Basin, Sierras Australes, Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    R. R. Andreis

    2003-06-01

    . The unit is composed of abundant diamictites [Dmm1, Dmm2, Dmg, Dms, Dms(r ], as well as sandstones (Sma, Smw, Sh, Sr, Sp, shales (Fm, Fl, Fd, and scarce conglomerates (Dcm, Dcg. The ciclicity was also analized, recognising three megacycles (lower, middle, and upper, with their respective lithofacies association. The lower megacycle allows a view of the Devonian paleorelief (Lolén Formation, and is composed by abundant diamictites, sandstones and scarce conglomerates. The middle megacycle contains sandstones and conglomerates and in the upper megacycle it is possible to see the diminuition in the frequence of diamictites (containing abundant dropstones partially replaced by sandstones and shales (in this case, only in the north profile. In the lower and upper megacycles, the Dmm1, Dmm2 and Dms(r facies, with decametric thickness and spread-out by hundred of meters, are the more conspicuous members, and are related to semiconsolidated or fluid cohesive debris flows, generated at proximal strong slopes. It is probable that the diamictites of the upper megacycle can be of the rain out type. The Dms(r includes contortioned or oriented sand bodies and frequent shaly intraclasts. The conglomerates represent non coesive deposits leaved by hiperconcentrated flows or grain flows. The Sma sandstones were deposited by suspensive dense flows, while Smw represent fine and dense suspensive flows transitional to liquefact flows. The other sandstones represent wave or current action (Sr or frontal accretion of transversal bars or sand dunes, by traccional currents. The beginning of the depositional processes was characterized by a rapid transgressive process during the Late Carboniferous under moderate subsidence conditions (eustatic processes. The lower megacicle is characterised by a slope-apron or debris-apron, localized near the continental talus, with strong aggradation and rare progradation. These conditions depend almost on the thermal regime of the cold base glaciers at South

  1. 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...

  2. Proposed pathophysiologic framework to explain some excess cardiovascular death associated with ambient air particle pollution: Insights for public health translation.

    Science.gov (United States)

    Cascio, Wayne E

    2016-12-01

    The paper proposes a pathophysiologic framework to explain the well-established epidemiological association between exposure to ambient air particle pollution and premature cardiovascular mortality, and offers insights into public health solutions that extend beyond regulatory environmental protections to actions that can be taken by individuals, public health officials, healthcare professionals, city and regional planners, local and state governmental officials and all those who possess the capacity to improve cardiovascular health within the population. The foundation of the framework rests on the contribution of traditional cardiovascular risk factors acting alone and in concert with long-term exposures to air pollutants to create a conditional susceptibility for clinical vascular events, such as myocardial ischemia and infarction; stroke and lethal ventricular arrhythmias. The conceptual framework focuses on the fact that short-term exposures to ambient air particulate matter (PM) are associated with vascular thrombosis (acute coronary syndrome, stroke, deep venous thrombosis, and pulmonary embolism) and electrical dysfunction (ventricular arrhythmia); and that individuals having prevalent heart disease are at greatest risk. Moreover, exposure is concomitant with changes in autonomic nervous system balance, systemic inflammation, and prothrombotic/anti-thrombotic and profibrinolytic-antifibrinolytic balance. Thus, a comprehensive solution to the problem of premature mortality triggered by air pollutant exposure will require compliance with regulations to control ambient air particle pollution levels, minimize exposures to air pollutants, as well as a concerted effort to decrease the number of people at-risk for serious clinical cardiovascular events triggered by air pollutant exposure by improving the overall state of cardiovascular health in the population. This article is part of a Special Issue entitled Air Pollution, edited by Wenjun Ding, Andrew J. Ghio

  3. Spatial and temporal associations of road traffic noise and air pollution in London: Implications for epidemiological studies.

    Science.gov (United States)

    Fecht, Daniela; Hansell, Anna L; Morley, David; Dajnak, David; Vienneau, Danielle; Beevers, Sean; Toledano, Mireille B; Kelly, Frank J; Anderson, H Ross; Gulliver, John

    2016-03-01

    Road traffic gives rise to noise and air pollution exposures, both of which are associated with adverse health effects especially for cardiovascular disease, but mechanisms may differ. Understanding the variability in correlations between these pollutants is essential to understand better their separate and joint effects on human health. We explored associations between modelled noise and air pollutants using different spatial units and area characteristics in London in 2003-2010. We modelled annual average exposures to road traffic noise (LAeq,24h, Lden, LAeq,16h, Lnight) for ~190,000 postcode centroids in London using the UK Calculation of Road Traffic Noise (CRTN) method. We used a dispersion model (KCLurban) to model nitrogen dioxide, nitrogen oxide, ozone, total and the traffic-only component of particulate matter ≤2.5μm and ≤10μm. We analysed noise and air pollution correlations at the postcode level (~50 people), postcodes stratified by London Boroughs (~240,000 people), neighbourhoods (Lower layer Super Output Areas) (~1600 people), 1km grid squares, air pollution tertiles, 50m, 100m and 200m in distance from major roads and by deprivation tertiles. Across all London postcodes, we observed overall moderate correlations between modelled noise and air pollution that were stable over time (Spearman's rho range: |0.34-0.55|). Correlations, however, varied considerably depending on the spatial unit: largest ranges were seen in neighbourhoods and 1km grid squares (both Spearman's rho range: |0.01-0.87|) and was less for Boroughs (Spearman's rho range: |0.21-0.78|). There was little difference in correlations between exposure tertiles, distance from road or deprivation tertiles. Associations between noise and air pollution at the relevant geographical unit of analysis need to be carefully considered in any epidemiological analysis, in particular in complex urban areas. Low correlations near roads, however, suggest that independent effects of road noise and

  4. Spatial and temporal associations of road traffic noise and air pollution in London: Implications for epidemiological studies.

    Science.gov (United States)

    Fecht, Daniela; Hansell, Anna L; Morley, David; Dajnak, David; Vienneau, Danielle; Beevers, Sean; Toledano, Mireille B; Kelly, Frank J; Anderson, H Ross; Gulliver, John

    2016-03-01

    Road traffic gives rise to noise and air pollution exposures, both of which are associated with adverse health effects especially for cardiovascular disease, but mechanisms may differ. Understanding the variability in correlations between these pollutants is essential to understand better their separate and joint effects on human health. We explored associations between modelled noise and air pollutants using different spatial units and area characteristics in London in 2003-2010. We modelled annual average exposures to road traffic noise (LAeq,24h, Lden, LAeq,16h, Lnight) for ~190,000 postcode centroids in London using the UK Calculation of Road Traffic Noise (CRTN) method. We used a dispersion model (KCLurban) to model nitrogen dioxide, nitrogen oxide, ozone, total and the traffic-only component of particulate matter ≤2.5μm and ≤10μm. We analysed noise and air pollution correlations at the postcode level (~50 people), postcodes stratified by London Boroughs (~240,000 people), neighbourhoods (Lower layer Super Output Areas) (~1600 people), 1km grid squares, air pollution tertiles, 50m, 100m and 200m in distance from major roads and by deprivation tertiles. Across all London postcodes, we observed overall moderate correlations between modelled noise and air pollution that were stable over time (Spearman's rho range: |0.34-0.55|). Correlations, however, varied considerably depending on the spatial unit: largest ranges were seen in neighbourhoods and 1km grid squares (both Spearman's rho range: |0.01-0.87|) and was less for Boroughs (Spearman's rho range: |0.21-0.78|). There was little difference in correlations between exposure tertiles, distance from road or deprivation tertiles. Associations between noise and air pollution at the relevant geographical unit of analysis need to be carefully considered in any epidemiological analysis, in particular in complex urban areas. Low correlations near roads, however, suggest that independent effects of road noise and

  5. GSTP1 and TNF Gene Variants and Associations between Air Pollution and Incident Childhood Asthma : The Traffic, Asthma and Genetics (TAG) Study

    NARCIS (Netherlands)

    MacIntyre, Elaina A.; Brauer, Michael; Melen, Erik; Bauer, Carl Peter; Bauer, Mario; Berdel, Dietrich; Bergstroem, Anna; Brunekreef, Bert; Chan-Yeung, Moira; Kluemper, Claudia; Fuertes, Elaine; Gehring, Ulrike; Gref, Anna; Heinrich, Joachim; Herbarth, Olf; Kerkhof, Marjan; Koppelman, Gerard H.; Kozyrskyj, Anita L.; Pershagen, Goran; Postma, Dirkje S.; Thiering, Elisabeth; Tiesler, Carla M. T.; Carlsten, Christopher

    2014-01-01

    Background: Genetics may partially explain observed heterogeneity in associations between traffic-related air pollution and incident asthma. Objective: Our aim was to investigate the impact of gene variants associated with oxidative stress and inflammation on associations between air pollution and i

  6. Industrial air pollution in rural Kenya: community awareness, risk perception and associations between risk variables

    OpenAIRE

    Omanga, Eunice; Ulmer, Lisa; Berhane, Zekarias; Gatari, Michael

    2014-01-01

    Background Developing countries have limited air quality management systems due to inadequate legislation and lack of political will, among other challenges. Maintaining a balance between economic development and sustainable environment is a challenge, hence investments in pollution prevention technologies get sidelined in favor of short-term benefits from increased production and job creation. This lack of air quality management capability translates into lack of air pollution data, hence th...

  7. Association between particulate air pollution and venous thromboembolism: A systematic literature review.

    Science.gov (United States)

    Franchini, Massimo; Mengoli, Carlo; Cruciani, Mario; Bonfanti, Carlo; Mannucci, Pier Mannuccio

    2016-01-01

    Air pollution is a leading global problem for public health. A number of ambient pollutants have been involved, including carbon monoxide (CO), nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3) and particulate matter (PM). Although exposure to PM has been linked to a wide array of cardiovascular and respiratory disorders, its effect on venous thrombotic disorders is still uncertain. To elucidate this issue, we have performed a systematic review on the existing literature on the association between PM and venous thromboembolism (VTE), using MEDLINE, EMBASE and Cochrane electronic databases. Of the 158 reviewed studies, 11 of them (3 case-crossover studies, 2 time-series studies, 2 case-control studies, 2 prospective cohort studies, 2 retrospective studies) involving more than 500,000 events fulfilled the inclusion criteria and results are presented here. Because there was substantial heterogeneity in study design, duration of follow-up, statistical measure of effects, clinical outcomes and threshold, we refrained to perform a quantitative analysis of the available data and carried out only a systematic review. Overall, the literature data suggest a link between PM and VTE, but further trials on larger populations of patients with homogeneous study designs and outcomes are warranted. PMID:26639051

  8. An Evaluation of Uncertainty Associated to Analytical Measurements of Selected Polycyclic Aromatic Compounds in Ambient Air

    International Nuclear Information System (INIS)

    This paper presents an evaluation of uncertainty associated to analytical measurement of eighteen polycyclic aromatic compounds (PACs) in ambient air by liquid chromatography with fluorescence detection (HPLC/FD). The study was focused on analyses of PM10, PM2.5 and gas phase fractions. Main analytical uncertainty was estimated for eleven polycyclic aromatic hydrocarbons (PAHs), four nitro polycyclic aromatic hydrocarbons (nitro-PAHs) and two hydroxy polycyclic aromatic hydrocarbons (OH-PAHs) based on the analytical determination, reference material analysis and extraction step. Main contributions reached 15-30% and came from extraction process of real ambient samples, being those for nitro- PAHs the highest (20-30%). Range and mean concentration of PAC mass concentrations measured in gas phase and PM10/PM2.5 particle fractions during a full year are also presented. Concentrations of OH-PAHs were about 2-4 orders of magnitude lower than their parent PAHs and comparable to those sparsely reported in literature. (Author)

  9. Arenas Pastor, Etnografía y alimentación entre los toba-ñachilamoleek y wichí-lhuku’tas del Chaco Central (Argentina), Edición del autor [], Buenos Aires, 2003, 562 p.

    OpenAIRE

    Montani, Rodrigo

    2006-01-01

    La voluminosa obra de Pastor Arenas es fruto de una investigación etnobiológica sobre la alimentación entre dos grupos indígenas del Chaco central argentino : los wichís « carmeños » y los tobas-pilagás. Ambos grupos, cada uno de los cuales fue delimitado siguiendo el pertinente criterio de filiación histórica, lingüística y socio-política, están asentados en la banda sur del río Pilcomayo, al noroeste de la provincia argentina de Formosa. El enfoque etnobiológico adoptado para la investigaci...

  10. Estudio cualicuantitativo de las variables sociales que definen escenarios de transmisión de la fiebre hemorrágica argentina en las provincias de Buenos Aires y Santa Fe, 2001-2010

    OpenAIRE

    Andrea Mastrangelo; Paula Tagliabue; Lorena Berro; Darío De Carolis; Anabel Sinchi; Clara Digilio; Delia Enria

    2014-01-01

    El objetivo de este artículo es caracterizar los escenarios de transmisión de fiebre hemorrágica argentina (FHA) en el período de vacunación (2001-2010). El estudio constó de tres etapas. En la primera, se realizó un análisis cuantitativo de la base de datos del Instituto Nacional de Enfermedades Virales Humanas “Dr. Julio I. Maiztegui” (INEVH) de casos de FHA confirmados en el período (221 casos) que, sobre la base del lugar de transmisión y la zona endémica conocida, se agruparon según tres...

  11. Modification by antioxidant supplementation of changes in human lung function associated with air pollutant exposure: A systematic review

    Directory of Open Access Journals (Sweden)

    Chow Katherine S

    2011-07-01

    Full Text Available Abstract Background Outdoor air pollution, given its demonstrated negative effects on the respiratory system, is a growing public health concern worldwide, particularly in urban cities. Human exposure to pollutants such as ozone, nitrogen oxides, combustion-related particulate matter and oxides of sulfur is responsible for significant cardiopulmonary morbidity and mortality in both adults and children. Several antioxidants have shown an ability to partially attenuate the negative physiological and functional impacts of air pollutants. This study systematically presents current data on the potential benefits of antioxidant supplementation on lung function outcomes associated with air pollutant exposures in intact humans. Methods Electronic databases (MEDLINE, EMBASE, BIOSIS Previews, Web of Sciences, Environmental Sciences & Pollution Management and TOXNET were systematically searched for all studies published up to April 2009. Search terms relating to the concepts of respiratory tract diseases, respiratory function tests, air pollution, and antioxidants were used. Data was systematically abstracted from original articles that satisfied selection criteria for inclusion. For inclusion, the studies needed to have evaluated human subjects, given supplemental antioxidants, under conditions of known levels of air pollutants with measured lung function before and after antioxidant administration and/or air pollution exposure. Selected studies were summarized and conclusions presented. Results Eight studies investigated the role of antioxidant supplementation on measured lung function outcomes after subject exposure to air pollutants under controlled conditions; 5 of these studies concluded that pollutant-induced airway hyper-responsiveness and diminution in lung function measurements were attenuated by antioxidant supplementation. The remaining five studies took place under ambient (uncontrolled exposures and unanimously concluded that antioxidant

  12. GST M1 GENOTYPE INFLUENCES THE SUSCEPTIBILITY OF MEN TO SPERM DNA DAMAGE ASSOCIATED WITH EXPOSURE TO AIR POLLUTION

    Science.gov (United States)

    GSTM1 GENOTYPE INFLUENCES THE SUSCEPTIBILITY OF MEN TO SPERM DNA DAMAGE ASSOCIATED WITH EXPOSURE TO AIR POLLUTION. J. Rubes1, SG Selevan2, R. Sram3, DPEvenson4, SD Perreault5. 1VRI, Brno, CR; 2US EPA/ORD/NCEA, Washington, DC; 3IEM AS CR, Prague, CR; 4SDSU, Brookings, SD; 5US EPA...

  13. 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.

  14. Annoyance Caused by Noise and Air Pollution during Pregnancy: Associated Factors and Correlation with Outdoor NO2 and Benzene Estimations.

    Science.gov (United States)

    Fernández-Somoano, Ana; Llop, Sabrina; Aguilera, Inmaculada; Tamayo-Uria, Ibon; Martínez, María Dolores; Foraster, Maria; Ballester, Ferran; Tardón, Adonina

    2015-06-01

    This study aimed to describe the degree of annoyance among pregnant women in a Spanish cohort and to examine associations with proximity to traffic, NO2 and benzene exposure. We included 2457 participants from the Spanish Childhood and Environment study. Individual exposures to outdoor NO2 and benzene were estimated, temporally adjusted for pregnancy. Interviews about sociodemographic variables, noise and air pollution were carried out. Levels of annoyance were assessed using a scale from 0 (none) to 10 (strong and unbearable); a level of 8 to 10 was considered high. The reported prevalence of high annoyance levels from air pollution was 11.2% and 15.0% from noise; the two variables were moderately correlated (0.606). Significant correlations between NO2 and annoyance from air pollution (0.154) and that from noise (0.181) were observed. Annoyance owing to noise and air pollution had a low prevalence in our Spanish population compared with other European populations. Both factors were associated with proximity to traffic. In multivariate models, annoyance from air pollution was related to NO2, building age, and country of birth; annoyance from noise was only related to the first two. The health burden of these exposures can be increased by stress caused by the perception of pollution sources. PMID:26095869

  15. Colonization by Cladosporium spp. of painted metal surfaces associated with heating and air conditioning systems

    Science.gov (United States)

    Ahearn, D. G.; Simmons, R. B.; Switzer, K. F.; Ajello, L.; Pierson, D. L.

    1991-01-01

    Cladosporium cladosporioides and C. hebarum colonized painted metal surfaces of covering panels and register vents of heating, air conditioning and ventilation systems. Hyphae penetrated the paint film and developed characteristic conidiophores and conidia. The colonies were tightly appressed to the metal surface and conidia were not readily detectable via standard air sampling procedures.

  16. Indoor to outdoor air quality associations with self-pollution implications inside passenger car cabins

    Science.gov (United States)

    Abi-Esber, L.; El-Fadel, M.

    2013-12-01

    In this study, in-vehicle and out-vehicle concentrations of fine particulate matter (PM2.5) and carbon monoxide (CO) are measured to assess commuter's exposure in a commercial residential area and on a highway, under three popular ventilation modes namely, one window half opened, air conditioning on fresh air intake, and air conditioning on recirculation and examine its relationship to scarcely studied parameters including self pollution, out-vehicle sample intake location and meteorological gradients. Self pollution is the intrusion of a vehicle's own engine fumes into the passenger's compartment. For this purpose, six car makes with different ages were instrumented to concomitantly monitor in- and out-vehicle PM2.5 and CO concentrations as well as meteorological parameters. Air pollution levels were unexpectedly higher in new cars compared to old cars, with in-cabin air quality most correlated to that of out-vehicle air near the front windshield. Self-pollution was observed at variable rates in three of the six tested cars. Significant correlations were identified between indoor to outdoor pressure difference and PM2.5 and CO In/Out (IO) ratios under air recirculation and window half opened ventilation modes whereas temperature and humidity difference affected CO IO ratios only under the air recirculation ventilation mode.

  17. Association between changes in exposure to air pollution and biomarkers of oxidative stress in children before and during the Beijing Olympics

    NARCIS (Netherlands)

    Lin, Weiwei; Zhu, Tong; Xue, Tao; Peng, Wei; Brunekreef, Bert; Gehring, Ulrike; Huang, Wei; Hu, Min; Zhang, Yuanhang; Tang, Xiaoyan

    2015-01-01

    It is not known whether exposure to air pollutants causes systemic oxidative stress in children. We investigated the association between exposure to air pollution and biomarkers of oxidative stress in relation to a governmental air quality intervention implemented during the 2008 Beijing Olympic Gam

  18. Association between exposure to ambient air pollution before conception date and likelihood of giving birth to girls in Guangzhou, China

    Science.gov (United States)

    Lin, Hualiang; Liang, Zhijiang; Liu, Tao; Di, Qian; Qian, Zhengmin; Zeng, Weilin; Xiao, Jianpeng; Li, Xing; Guo, Lingchuan; Ma, Wenjun; Zhao, Qingguo

    2015-12-01

    A few studies have linked ambient air pollution with sex ratio at birth. Most of these studies examined the long-term effects using spatial or temporal comparison approaches. This study aimed to investigate whether parental exposure to air pollution before conception date could affect the likelihood of the offspring being male or female. We used the information collected in a major maternal hospital in Guangzhou, China. The parental exposure to air pollution was assessed using the air pollution concentration before the conception date. Logistic regression models were used to assess the association between air pollution exposure and birth sex with adjustment for potential confounding factors, such as maternal age, parental education levels, long-term trend, season, and weather condition (mean temperature and relative humidity). The analysis revealed that higher air pollution was associated with higher probability of female newborns, with the effective exposure around one week prior to conception date. In the one-pollutant models, PM10, SO2 and NO2 had significant effects. For example, the excess risk was 0.61% (95% confidence interval (95% CI): 0.36%, 0.86%) for a 10 ug/m3 increase in lag 2 day's PM10, 0.42% (95% CI: 0.21%, 0.64%) for lag 3 day's SO2 and 0.97% (95% CI: 0.44%, 1.50%) for lag 3 day's NO2; and in two-pollutant models, PM10 remained statistically significant. These results suggest that parental exposure to ambient air pollution a few days prior to conception might be a contributing factor to higher probability of giving birth to female offspring in Guangzhou.

  19. A review of hymenopterous parasitoid guilds attacking Anastrepha spp. and Ceratitis capitata (Diptera: Tephritidae) in Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Ovruski, Sergio M.; Orono, Luis E.; Nunez-Campero, Segundo; Schliserman, Pablo; Albornoz-Medina, Patricia; Bezdjian, Laura P.; Nieuwenhove, Guido A. Van; Martin, Cristina B. [Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET), Tucuman (Argentina). Planta Piloto de Procesos Industriales Microbiologicos y Biotecnologia. Div. Control Biologico de Plagas

    2006-07-01

    This study provides detailed information on the diversity, abundance, guilds, host plant and host fly ranges, distribution, and taxonomic status of hymenopterous parasitoid species associated with Ceratitis capitata (Wiedemann) and Anastrepha spp. (A. fraterculus (Wiedemann) and A. schultzi Blanchard) in Argentina. Moreover, the article also argues future needs regarding the use of some parasitoid species as an alternative tool in fruit fly management programs of the National Fruit Fly Control and Eradication Program (PROCEM-Argentina). Data used for this work were obtained from numerous old and recent published articles on fruit fly parasitoids in Argentina. (author)

  20. A Review of the Biology of Eucharitidae (Hymenoptera: Chalcidoidea from Argentina

    Directory of Open Access Journals (Sweden)

    Javier Torréns

    2013-01-01

    Full Text Available All the members of Eucharitidae are parasitoid of ants. Argentina has 14 genera and 41 species, but little is known about their biology. Herein are provided new data for host associations (host ant and/or host plant of Galearia latreillei, Kapala spp., Latina rugosa, Orasema aenea, and Orasema sp. A revision of the most relevant biological aspects of Dicoelothorax platycerus, Latina rugosa, Neolirata alta, N. daguerrei, Lophyrocera variabilis, Orasema argentina, O. salebrosa, O. simplex, O. susanae, O. worcesteri, and O. xanthopus is included. New records of K. sulcifacies, Lo. plagiata, and Ob. semifumipennis in Argentina are presented. Galearia proseni is synonymized with G. latreillei.

  1. A review of hymenopterous parasitoid guilds attacking Anastrepha spp. and Ceratitis capitata (Diptera: Tephritidae) in Argentina

    International Nuclear Information System (INIS)

    This study provides detailed information on the diversity, abundance, guilds, host plant and host fly ranges, distribution, and taxonomic status of hymenopterous parasitoid species associated with Ceratitis capitata (Wiedemann) and Anastrepha spp. (A. fraterculus (Wiedemann) and A. schultzi Blanchard) in Argentina. Moreover, the article also argues future needs regarding the use of some parasitoid species as an alternative tool in fruit fly management programs of the National Fruit Fly Control and Eradication Program (PROCEM-Argentina). Data used for this work were obtained from numerous old and recent published articles on fruit fly parasitoids in Argentina. (author)

  2. Republic of Argentina: Argentina is the envy of other Latin American countries.

    Science.gov (United States)

    Spain, D

    1984-05-01

    Argentina's economic and political history may appear grim by US standards, but it is envied by many other Latin American nations, and by Latin American standards its demographic situation is enviable as well. A low population growth rate combined with abundant natural resources means that the poverty of its neighbors has not hit Argentina. Almost everyone eats well and the staple is beef -- about 240 pounds per capita per year. Final figures for the 1980 census of population and housing report a total of 27.9 million people, an increase of 17% from the 23.8 million people counted in 1970. The average annual rate of increase was 1.5% a year. With the exception of Uruguay, this is the lowest rate of increase in continental Latin America. The birthrate of 24 births/1000 population is third only to Chile and Uruguay as the lowest in continental Latin America, although the death rate is about average at 9/1000. After several decades of decline, the death rate is rising again because the population is aging. A current problem is the emigration of Argentinians to other countries, a problem that is most severe among highly trained professionals. Over 1/3 of those who leave Argentina come to the US, with Spain and Canada receiving the next highest numbers. At its current growth rate, Argentina's population will double in 46 years. It is estimated that the population was 29.1 million in 1983; it is projected to be 34.5 million by the year 2000 and 39.6 million by 2020. Over 1/3 of the population live in and around Gran Buenos Aires, the largest metropolitan area in South America and among the ten largest in the world. There is a large core of Spanish descendents still living, but some other European countries are well represented also. The 1980 census recorded 7.1 million households; the average number of persons per household was 3.9. There were 8.2 million dwellings counted in 1980, with an average of 3.3 people per dwelling. 13% of all dwellings were unoccupied at the

  3. Tobacco industry targeting youth in Argentina

    Science.gov (United States)

    Braun, S; Mejia, R; Ling, P M; Pérez-Stable, E J

    2013-01-01

    Background/aim Argentina has one of the highest cigarette smoking rates among both men and women in the Americas and no legislated restrictions on tobacco industry advertising. The tobacco industry has traditionally expanded markets by targeting adolescents and young adults. The objective of this study was to determine whether and how the tobacco industry promotes cigarettes to adolescents in Argentina. Methods We conducted a systematic search of tobacco industry documents available through the internet dated between 1995 and 2004 using standard search terms to identify marketing strategies in Argentina. A selected review of the four leading newspapers and nine magazines with reported high readership among adolescents was completed. The selected print media were searched for tobacco images and these were classified as advertisements if associated with a commercial product or as a story if not. Results The tobacco industry used market segmentation as a strategy to target Argentinean consumers. British American Tobacco (BAT) undertook a young adult psychographic study and classified them as “progressives”, “Jurassics” or “conservatives” and “crudos” or “spoiled brats”. BAT marketed Lucky Strike to the “progressives” using Hollywood movies as a vehicle. The tobacco industry also targeted their national brands to the conservatives and linked these brands with “nationalistic values” in advertising campaigns. Philip Morris promoted Marlboro by sponsoring activities directed at young people and they launched the 10 cigarettes packet as a starter vehicle. Conclusions The tobacco industry used psychographic segmentation of the population and developed advertising strategies focused on youth. Tobacco control researchers and advocates must be able to address these strategies in counter-marketing interventions. PMID:18299308

  4. Association of ambient air quality with children`s lung function in urban and rural Iran

    Energy Technology Data Exchange (ETDEWEB)

    Asgari, M.M.; Dubois, A.; Beckett, W.S. [Yale Univ. School of Medicine, New Haven, CT (United States); Asgari, M. [Shaheed Beheshti Univ., Tehran (Iran, Islamic Republic of); Gent, J. [John B. Pierce Lab., New Haven, CT (United States)

    1998-05-01

    During the summer of 1994, a cross-sectional epidemiological study, in which the pulmonary function of children in Tehran was compared with pulmonary function in children in a rural town in Iran, was conducted. Four hundred children aged 5--11 y were studied. Daytime ambient nitrogen dioxide, sulfur dioxide, and particulate matter were measured with portable devices, which were placed in the children`s neighborhoods on the days of study. Levels of these ambient substances were markedly higher in urban Tehran than in rural areas. Children`s parents were questioned about home environmental exposures (including heating source and environmental tobacco smoke) and the children`s respiratory symptoms. Pulmonary function was assessed, both by spirometry and peak expiratory flow meter. Forced expiratory volume in 1 s and forced vital capacity--as a percentage of predicted for age, sex and height--were significantly lower in urban children than in rural children. Both measurements evidenced significant reverse correlations with levels of sulfur dioxide, nitrogen dioxide, and particulate matter. Differences in spirometric lung function were not explained by nutritional status, as assessed by height and weight for age, or by home environmental exposures. Reported airway symptoms were higher among rural children, whereas reported physician diagnosis of bronchitis and asthma were higher among urban children. The association between higher pollutant concentrations and reduced pulmonary function in this urban-rural comparison suggests that there is an effect of urban air pollution on short-term lung function and/or lung growth and development during the preadolescent years.

  5. Hungry China Shops in Argentina

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    @@ Chinese investment is flooding into Argentina as the Asian giant expands its global commodity hunt from the raw materials used in industry to the foodstuffs needed to feed its 1.3 billion citizens. China's investment in Latin America hit USI15.6 billion during the 12-month period through the end of May, nearly three times greater than the year-ago period, consulting firm Deloitte said in a report.Of that amount, Brazil received about 60% and Argentina close to 40%.

  6. Tick paralysis cases in Argentina

    Directory of Open Access Journals (Sweden)

    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.

  7. TYPICAL WEATHER CHARACTERISTICS ASSOCIATED WITH AIR POLLUTION IN HONG KONG AREA

    Institute of Scientific and Technical Information of China (English)

    CHEN Xun-lai; FAN Shao-jia; LI Jiang-nan; LIU Ji; WANG An-yu; FONG Soi-kun

    2008-01-01

    With the hourly data of Air Pollution Index (API) by Hong Kong Environmental Protection Department (HKEPD) during the 6 years of 2000 - 2005 and NCEP / NCAR reanalysis data of 2.5°×2.5° wind and pressure fields, the characteristics of API in Hong Kong area and the impacts of typical weather characteristics on the air pollution in Hong Kong have been studied. The results are shown as follows. (1) The API exhibits obvious seasonal variability as the number of air pollution days increases by the year. For most of the local monitoring stations, it is the most from January to March, a little less from July to September and the least from April to June. (2) There are four typical types of weather situations that are responsible for the air pollution in Hong Kong: tropical cyclones, continental cold highs, transformed highs that have moved out to sea and low pressure troughs.

  8. The association between low level exposures to ambient air pollution and term low birth weight: a retrospective cohort study

    Directory of Open Access Journals (Sweden)

    Stieb David

    2006-02-01

    Full Text Available Abstract Background Studies in areas with relatively high levels of air pollution have found some positive associations between exposures to ambient levels of air pollution and several birth outcomes including low birth weight (LBW. The purpose of this study was to examine the association between LBW among term infants and ambient air pollution, by trimester of exposure, in a region of lower level exposures. Methods The relationship between LBW and ambient levels of particulate matter up to 10 um in diameter (PM10, sulfur dioxide (SO2 and ground-level ozone (O3 was evaluated using the Nova Scotia Atlee Perinatal Database and ambient air monitoring data from the Environment Canada National Air Pollution Surveillance Network and the Nova Scotia Department of Environment. The cohort consisted of live singleton births (≥37 weeks of gestation between January1,1988 and December31,2000. Maternal exposures to air pollution were assigned to women living within 25 km of a monitoring station at the time of birth. Air pollution was evaluated as a continuous and categorical variable (using quartile exposures for each trimester and relative risks were estimated from logistic regression, adjusted for confounding variables. Results There were 74,284 women with a term, singleton birth during the study period and with exposure data. In the analyses unadjusted for year of birth, first trimester exposures in the highest quartile for SO2 and PM10suggested an increased risk of delivering a LBW infant (relative risk = 1.36, 95% confidence interval = 1.04 to 1.78 for SO2 exposure and relative risk = 1.33, 95% confidence interval = 1.02 to 1.74 for PM10. After adjustment for birth year, the relative risks were attenuated somewhat and not statistically significant. A dose-response relationship for SO2 was noted with increasing levels of exposure. No statistically significant effects were noted for ozone. Conclusion Our results suggest that exposure during the first

  9. Condiciones medias de invierno y ondas cuasi-estacionarias de Rossby asociadas a la frecuencia invernal de noches frias y cálidas en Argentina subtropical Mean winter conditions and quasi-stationary Rossby waves associated with the winter frequency of warm and cold nights in subtropical Argentina

    Directory of Open Access Journals (Sweden)

    Eduardo A Agosta

    2012-12-01

    Full Text Available El estudio busca definir las condiciones medias de la circulación troposférica y posibles forzantes asociados a la frecuencia de ocurrencia de noches frías (TN10 y noches cálidas (TN90 durante el invierno austral (JJA sobre Argentina subtropical, al norte de 40°S y adyacencias (ASA a partir de datos de estaciones meteorológicas y de reanálisis (NCEP/DOE AMIP-II y ECMWF ERA-interim. Se encuentra que la frecuencia de noches cálidas (Tmin superiores al percentil 90, TN90 está modulada interanualmente por la propagación de ondas cuasi-estacionarias (OCE de Rossby inducidas por anomalías de convección en el Índico y el Pacífico. La alta frecuencia de noches cálidas está asociada a calentamiento anómalo del Pacífico central ecuatorial (fase positiva del El Niño-Oscilación del Sur, ENOS. La baja frecuencia de noches cálidas está relacionada con convección anómala sobre el área monzónica de la India y el Índico sur tropical occidental. Esto favorece la propagación de actividad de OCE de Rossby sobre el Índico, el Pacífico y el sur de Sudamérica. Tal teleconexión a su vez favorece la alta frecuencia de noches frías (Tmin inferiores al percentil 10, TN10. En cambio la baja frecuencia de noches frías está vinculada a variabilidad de baja frecuencia del modo de variabilidad de altas latitudes del hemisferio sur (el MAS. Se encuentra que el fortalecimiento (debilitamiento del jet subtropical sobre Sudamérica y océanos adyacentes caracteriza los inviernos con alta (baja frecuencia de noches frías (cálidas en ASA. Los forzantes remotos encontrados involucran procesos atmosféricos/oceánicos que se interconectan interestacionalmente, lo cual podría permitir desarrollar el pronóstico estadístico-dinámico de alta o baja frecuencia de noches frías o cálidas en invierno.The study aims to examine the mean conditions of the tropospheric circulation and possible forcing associated with the occurrence frequency of cold

  10. Association of Traffic-Related Air Pollution with Children’s Neurobehavioral Functions in Quanzhou, China

    OpenAIRE

    Wang, Shunqin; Zhang, Jinliang; Zeng, Xiaodong; Zeng, Yimin; Wang, Shengchun; Chen, Shuyun

    2009-01-01

    Background With the increase of motor vehicles, ambient air pollution related to traffic exhaust has become an important environmental issue in China. Because of their fast growth and development, children are more susceptible to ambient air pollution exposure. Many chemicals from traffic exhaust, such as carbon monoxide, nitrogen dioxide, and lead, have been reported to show adverse effects on neurobehavioral functions. Several studies in China have suggested that traffic exhaust might affec...

  11. Wheat straw burning and its associated impacts on Beijing air quality

    Institute of Scientific and Technical Information of China (English)

    LI LingJun; WANG Ying; ZHANG Qiang; LI JinXiang; YANG XiaoGuang; JIN Jun

    2008-01-01

    Based on MODIS images, large-scale flow field charts and environmental monitoring data, we thoroughly analyzed the spatial distribution of wheat straw burning in North China, with focus on its environmental impacts on the air quality of Beijing and pollution transport paths. And we anatomized changes of air quality in Beijing under the impacts of pollution generated by wheat straw burning around. The results indicate that: (1) The North China Plain, a winter-wheat growing area, is the main source of pollutants induced by wheat straw burning in Beijing. The direction of south-west is the dominant heavy pollution transport path. (2) Impacts of wheat straw burning on air quality are mainly manifested by significantly increasing CO concentration. (3) Precursors of O3 generated by wheat straw burning, combining with favorable meteorological conditions, can induce increasing O3 concentration greatly. NO concentration will be greatly increased due to decreasing O3 concentration at night.(4) Atmospheric particles, especially the fine ones, from wheat straw burning exert considerable influence on Beijing air quality. (5) Different contributions of wheat straw burning to pollutants are identified.Ratios of PM10/SO2, CO/SO2, etc., can be applied to indicate pollution extent of wheat straw burning.High ratios of PM10/SO2 and CO/SO2 show that the air quality was heavily impacted by wheat straw burning and these ratios can be employed as indicators of contribution of wheat straw burning to the degradation of Beijing air quality. (6) Randomness of wheat straw burning activities renders random outbreak of air pollution of this type. Regional and extensive wheat straw burning activities can cause serious air pollution event.

  12. Wheat straw burning and its associated impacts on Beijing air quality

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Based on MODIS images, large-scale flow field charts and environmental monitoring data, we thor- oughly analyzed the spatial distribution of wheat straw burning in North China, with focus on its envi- ronmental impacts on the air quality of Beijing and pollution transport paths. And we anatomized changes of air quality in Beijing under the impacts of pollution generated by wheat straw burning around. The results indicate that: (1) The North China Plain, a winter-wheat growing area, is the main source of pollutants induced by wheat straw burning in Beijing. The direction of south-west is the dominant heavy pollution transport path. (2) Impacts of wheat straw burning on air quality are mainly manifested by significantly increasing CO concentration. (3) Precursors of O3 generated by wheat straw burning, combining with favorable meteorological conditions, can induce increasing O3 concentration greatly. NO concentration will be greatly increased due to decreasing O3 concentration at night. (4) Atmospheric particles, especially the fine ones, from wheat straw burning exert considerable influ- ence on Beijing air quality. (5) Different contributions of wheat straw burning to pollutants are identified. Ratios of PM10/SO2, CO/SO2, etc., can be applied to indicate pollution extent of wheat straw burning. High ratios of PM10/SO2 and CO/SO2 show that the air quality was heavily impacted by wheat straw burning and these ratios can be employed as indicators of contribution of wheat straw burning to the degradation of Beijing air quality. (6) Randomness of wheat straw burning activities renders random outbreak of air pollution of this type. Regional and extensive wheat straw burning activities can cause serious air pollution event.

  13. Association between Ambient Air Pollution and Asthma Prevalence in Different Population Groups Residing in Eastern Texas, USA.

    Science.gov (United States)

    Gorai, Amit Kr; Tchounwou, Paul B; Tuluri, Francis

    2016-03-29

    Air pollution has been an on-going research focus due to its detrimental impact on human health. However, its specific effects on asthma prevalence in different age groups, genders and races are not well understood. Thus, the present study was designed to examine the association between selected air pollutants and asthma prevalence in different population groups during 2010 in the eastern part of Texas, USA.The pollutants considered were particulate matter (PM2.5 with an aerodynamic diameter less than 2.5 micrometers) and surface ozone. The population groups were categorized based on age, gender, and race. County-wise asthma hospital discharge data for different age, gender, and racial groups were obtained from Texas Asthma Control Program, Office of Surveillance, Evaluation and Research, Texas Department of State Health Services. The annual means of the air pollutants were obtained from the United States Environmental Protection Agency (U.S. EPA)'s air quality system data mart program. Pearson correlation analyzes were conducted to examine the relationship between the annual mean concentrations of pollutants and asthma discharge rates (ADR) for different age groups, genders, and races. The results reveal that there is no significant association or relationship between ADR and exposure of air pollutants (PM2.5, and O₃). The study results showed a positive correlation between PM2.5 and ADR and a negative correlation between ADR and ozone in most of the cases. These correlations were not statistically significant, and can be better explained by considering the local weather conditions. The research findings facilitate identification of hotspots for controlling the most affected populations from further environmental exposure to air pollution, and for preventing or reducing the health impacts.

  14. Association between Ambient Air Pollution and Asthma Prevalence in Different Population Groups Residing in Eastern Texas, USA

    Directory of Open Access Journals (Sweden)

    Amit Kr. Gorai

    2016-03-01

    Full Text Available Air pollution has been an on-going research focus due to its detrimental impact on human health. However, its specific effects on asthma prevalence in different age groups, genders and races are not well understood. Thus, the present study was designed to examine the association between selected air pollutants and asthma prevalence in different population groups during 2010 in the eastern part of Texas, USA.The pollutants considered were particulate matter (PM2.5 with an aerodynamic diameter less than 2.5 micrometers and surface ozone. The population groups were categorized based on age, gender, and race. County-wise asthma hospital discharge data for different age, gender, and racial groups were obtained from Texas Asthma Control Program, Office of Surveillance, Evaluation and Research, Texas Department of State Health Services. The annual means of the air pollutants were obtained from the United States Environmental Protection Agency (U.S. EPA’s air quality system data mart program. Pearson correlation analyzes were conducted to examine the relationship between the annual mean concentrations of pollutants and asthma discharge rates (ADR for different age groups, genders, and races. The results reveal that there is no significant association or relationship between ADR and exposure of air pollutants (PM2.5, and O3. The study results showed a positive correlation between PM2.5 and ADR and a negative correlation between ADR and ozone in most of the cases. These correlations were not statistically significant, and can be better explained by considering the local weather conditions. The research findings facilitate identification of hotspots for controlling the most affected populations from further environmental exposure to air pollution, and for preventing or reducing the health impacts.

  15. 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, Emmanuelle; Arnaud, Nicolas; Guivel, Christèle; Lagabrielle, Yves; Scalabrino, Bruno; Espinoza, Felipe

    2010-05-01

    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.

  16. Juan Valentin: un gelogo que supo resumir la geologa argentina Juan Valentin: a geologist that compiled the geology of Argentina

    Directory of Open Access Journals (Sweden)

    Florencio Gilberto Aceolaza

    2011-09-01

    Full Text Available Juan Valentin fue un destacado gelogo alemn que arrib a nuestra patria en 1894 para integrarse a los equipos que entonces desarrollaban investigaciones desde el Museo de La Plata y el Museo Nacional de Buenos Aires. Su trabajo lo llev, inicialmente, a estudiar las sierras de Buenos Aires y luego tambin lo hizo en Crdoba, San Luis, Salta y Jujuy. Fue grande su actividad, motivo por el cual, se lo incorpor a la Sociedad Cientfica Argentina asumiendo la revisin y compaginacin de los Anales que en ese tiempo editaba la mencionada institucin. Esta actividad ms el conocimiento de campo logrado, lo llev a confeccionar un extenso artculo donde describi la geologa de la Argentina, el cual fue agregado a la edicin del Segundo Censo Nacional. A este trabajo se lo considera una importante sntesis sobre la constitucin geolgica del pas. Entusiasmado con el apoyo que vena logrando planific un programa de investigacin para desarrollar en el norte de la Patagonia e incrementar el conocimiento de la estratigrafa regional. As fue que, en octubre de en 1897, se dirigi a Puerto Madryn donde llev adelante sus primeros trabajos en el valle del ro Chubut y la zona de Cabo Raso. Revisando afloramientos en las cercanas de Aguada de Reyes muri en un fatal accidente, como dice la crnica, con sus bolsillos repletos de los fsiles que haba coleccionado. Haca poco ms de dos aos que se desempeaba en el pas y contaba con 30 aos recin cumplidos. La mencin histrica narra que su cuerpo fue sepultado en la ciudad de Rawson.Juan Valentin was a German geologist that arrived to Argentina in 1894 to join the staff members of the Museum of La Plata and the National Museum of Buenos Aires. His work initially took him to explore the Buenos Aires ranges, and then those of Crdoba, San Luis, Salta and Jujuy. He joined the Argentine Scientific Society, assuming the edition of the Annals. His activities and the achieved knowledge in the field led him to prepare a lengthy article describing the

  17. La Argentina y el Plan Marshall: promesas y realidades Argentina and the Marshall Plan: promises and realities

    Directory of Open Access Journals (Sweden)

    Mario Rapoport

    2009-06-01

    Full Text Available El artículo analiza los intereses y prioridades de la política económica externa de los Estados Unidos y las complejas relaciones entre Washington y el gobierno de Buenos Aires en relación a la puesta en marcha del Plan Marshall de reconstrucción de Europa Occidental. La no participación de la Argentina en él dificultó su proceso de industrialización al restringir su comercio con el viejo continente e impedirle obtener las divisas necesarias para comprar en los EEUU, proveedor fundamental de los bienes que necesitaba.The article analyze both the interests and priorities of the foreign economic policy of the United States and the complex relationship between Washington and the peronist government when President Truman impose the Marshall Plan in Europe making more difficult the industrialisation of Argentina.

  18. Crisis en la Argentina: una respuesta desde la historia de las bibliotecas públicas

    OpenAIRE

    Alejandro E. Parada

    2002-01-01

    The author defines and epitomizes the concept of crisis and associates the duration with the likely outcome. States that in 2002 Argentina is in crisis and offers a look at the problem from the Library Science with the question: what tells us the history of public libraries in Argentina during their continuous and endless crisis? To outline some answers presents four Argentine library events occurred in the late colonial period (1794), in the May Revolution (1810-1812), in 1870 with the enact...

  19. Family Dynamics and Personal Strengths among Dementia Caregivers in Argentina

    Science.gov (United States)

    Elnasseh, Aaliah G.; Trujillo, Michael A.; Peralta, Silvina Victoria; Stolfi, Miriam E.; Morelli, Eliana; Perrin, Paul B.

    2016-01-01

    This study examined whether healthier family dynamics were associated with higher personal strengths of resilience, sense of coherence, and optimism among dementia caregivers in Argentina. Caregivers are usually required to assist individuals with dementia, and family members have typically fulfilled that role. Personal strengths such as resilience, sense of coherence, and optimism have been shown to protect caregivers from some of the negative experiences of providing care, though the family-related variables associated with these personal strengths are largely unknown. Hierarchical multiple regressions investigated the extent to which family dynamics variables are associated with each of the caregiver personal strengths after controlling for demographic and caregiver characteristics. A sample of 105 caregivers from Argentina completed a set of questionnaires during a neurologist visit. Family dynamics explained 32% of the variance in resilience and 39% of the variance in sense of coherence. Greater family empathy and decreased family problems were uniquely associated with higher resilience. Greater communication and decreased family problems were uniquely associated with higher sense of coherence. Optimism was not found to be significantly associated with family dynamics. These results suggest that caregiver intervention research focused on the family may help improve caregiver personal strengths in Argentina and other Latin American countries. PMID:27413574

  20. Short-term associations between outdoor air pollution and visits to accident and emergency departments in London for respiratory complaints.

    Science.gov (United States)

    Atkinson, R W; Anderson, H R; Strachan, D P; Bland, J M; Bremner, S A; Ponce de Leon, A

    1999-02-01

    Many epidemiological studies have shown positive short-term associations between health and current levels of outdoor air pollution. The aim of this study was to investigate the association between air pollution and the number of visits to accident and emergency (A&E) departments in London for respiratory complaints. A&E visits include the less severe cases of acute respiratory disease and are unrestricted by bed availability. Daily counts of visits to 12 London A&E departments for asthma, other respiratory complaints, and both combined for a number of age groups were constructed from manual registers of visits for the period 1992-1994. A Poisson regression allowing for seasonal patterns, meteorological conditions and influenza epidemics was used to assess the associations between the number of visits and six pollutants: nitrogen dioxide, ozone, sulphur dioxide, carbon monoxide, and particles measured as black smoke (BS) and particles with a median aerodynamic diameter of <10 microm (PM10). After making an allowance for the multiplicity of tests, there remained strong associations between visits for all respiratory complaints and increases in SO2: a 2.8% (95% confidence interval (CI) 0.7-4.9) increase in the number of visits for a 18 microg x (-3) increase (10th-90th percentile range) and a 3.0% (95% CI 0.8-5.2) increase for a 31 microg x m(-3) increase in PM10. There were also significant associations between visits for asthma and SO2, NO2 and PM10. No significant associations between O3 and any of the respiratory complaints investigated were found. Because of the strong correlation between pollutants, it was difficult to identify a single pollutant responsible for the associations found in the analyses. This study suggests that the levels of air pollution currently experienced in London are linked to short-term increases in the number of people visiting accident and emergency departments with respiratory complaints. PMID:10065665

  1. Aphididae (Hemiptera) on ornamental plants in Córdoba (Argentina) Aphididae (Hemiptera) en plantas ornamentales de Córdoba (Argentina)

    OpenAIRE

    Alfonsina Szpeiner

    2008-01-01

    In 30 surveys across Cordoba city and surroundings (Argentina) I recorded, from November 2001 to May 2002, a total of 109 ornamental plants infested with aphid colonies. Surveys were conducted in the local botanical garden as well as homestead gardens and nurseries. Seventeen species of aphids were identified, 4 of which are new species in the area, from 47 ornamental plants. In a total of 59 plant/aphid associations, 38 new associations were found. I present the first record of aphids coloni...

  2. NREL technical assistance to Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Lilienthal, P. [National Renewable Energy Lab., Golden, CO (United States)

    1997-12-01

    This paper describes assistance to Argentina from the National Renewable Energy Laboratory which has touched on four programs: tariff analysis for rural concessions programs; wind/diesel hybrid retrofits in Patagonia; small hybrid systems designs for rural schools; an assessment of wind resources. The paper expands briefly on the first two points.

  3. [Awareness of the risk of air bag-associated injuries essential].

    Science.gov (United States)

    Björnstig, Ulf; Haraldsson, Per-Olle; Polland, Werner; Sandström, Thomas

    2002-07-11

    Restraint systems, such as air bags and seat belts with pretensioners, reduce effectively the risk of serious injuries of car occupants. However, this equipment may have some adverse effects. In a frontal air bag deployment the cushion expands with a speed of about 200 km/h towards the driver. A person within the expansion zone, i.e. within 20 centimetres from the steering wheel hub, may experience a considerable injury risk. Short people, pregnant women and people "out of normal position" are especially at risk, as well as paramedics exposed for accidentally deployed air bags during rescue work. The gas generator in the air bag produces nitrogen in a chemical process. However, small amounts of NaOH (caustic soda) may leak out of the gas generator and may contaminate eyes and wounds and cause injuries and delay healing. The air bag gases may provoke an asthmatic attack in sensible individuals and a few will experience a hearing loss, often in the range of 4,000-6,000 Hz, from the sound impulse that may reach a level of 170 dB. Correct handling, based on a familiarity of the effects and side effects of modern restraint systems, would minimise the risk of adverse effects of this safety equipment. PMID:12170512

  4. The Association of Ambient Air Pollution and Traffic Exposures With Selected Congenital Anomalies in the San Joaquin Valley of California

    OpenAIRE

    Padula, Amy M.; Tager, Ira B.; Carmichael, Suzan L.; Hammond, S. Katharine; Lurmann, Frederick; Shaw, Gary M.

    2013-01-01

    Congenital anomalies are a leading cause of infant mortality and are important contributors to subsequent morbidity. Studies suggest associations between environmental contaminants and some anomalies, although evidence is limited. We aimed to investigate whether ambient air pollutant and traffic exposures in early gestation contribute to the risk of selected congenital anomalies in the San Joaquin Valley of California, 1997–2006. Seven exposures and 5 outcomes were included for a total of 35 ...

  5. Distributions of air pollutants associated with oil and gas development measured in the Upper Green River Basin of Wyoming.

    OpenAIRE

    R. A. Field; J.J. Soltis; P. Pérez-Ballesta; E. Grandesso; D. C. Montague

    2015-01-01

    Diffusive sampler monitoring techniques were employed to assess the spatial variability of air pollutants associated with the Pinedale Anticline and Jonah Field oil and natural gas (O&NG) developments in the Upper Green River Basin, Wyoming. Diffusive sampling identified both the extent of wintertime ozone episodes and the distributions of oxides of nitrogen (NOx), volatile organic compounds (VOC) including BTEX (benzene, toluene, ethylbenzene and xylene isomers), and volatile ...

  6. Individualized lung recruitment during high-frequency ventilation in preterm infants is not associated with lung hyperinflation and air leaks

    OpenAIRE

    De Jaegere, Anne P; Deurloo, Eline E.; van Rijn, Rick R.; Offringa, Martin; van Kaam, Anton H.

    2016-01-01

    Lung recruitment during high-frequency ventilation (HFV) in preterm infants with respiratory distress syndrome (RDS) has been associated with an increased risk of lung hyperinflation and air leaks. Individualizing the lung recruitment procedure to the severity of lung disease of each patient might reduce these risks. In this prospective cohort study, we evaluated chest X-ray (CXR) characteristics during individualized oxygenation-guided lung recruitment with HFV in preterm infants with RDS, b...

  7. Air trapping on chest CT is associated with worse ventilation distribution in infants with cystic fibrosis diagnosed following newborn screening.

    Directory of Open Access Journals (Sweden)

    Graham L Hall

    Full Text Available BACKGROUND: In school-aged children with cystic fibrosis (CF structural lung damage assessed using chest CT is associated with abnormal ventilation distribution. The primary objective of this analysis was to determine the relationships between ventilation distribution outcomes and the presence and extent of structural damage as assessed by chest CT in infants and young children with CF. METHODS: Data of infants and young children with CF diagnosed following newborn screening consecutively reviewed between August 2005 and December 2009 were analysed. Ventilation distribution (lung clearance index and the first and second moment ratios [LCI, M(1/M(0 and M(2/M(0, respectively], chest CT and airway pathology from bronchoalveolar lavage were determined at diagnosis and then annually. The chest CT scans were evaluated for the presence or absence of bronchiectasis and air trapping. RESULTS: Matched lung function, chest CT and pathology outcomes were available in 49 infants (31 male with bronchiectasis and air trapping present in 13 (27% and 24 (49% infants, respectively. The presence of bronchiectasis or air trapping was associated with increased M(2/M(0 but not LCI or M(1/M(0. There was a weak, but statistically significant association between the extent of air trapping and all ventilation distribution outcomes. CONCLUSION: These findings suggest that in early CF lung disease there are weak associations between ventilation distribution and lung damage from chest CT. These finding are in contrast to those reported in older children. These findings suggest that assessments of LCI could not be used to replace a chest CT scan for the assessment of structural lung disease in the first two years of life. Further research in which both MBW and chest CT outcomes are obtained is required to assess the role of ventilation distribution in tracking the progression of lung damage in infants with CF.

  8. Evapofacies del Salar Hombre Muerto, Puna argentina: distribucion y genesis Evapofacies associated with the Salar Hombre Muerto, Puna: Distribution and genesis

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    D. Vinante

    2006-06-01

    Full Text Available En el presente trabajo se identifican, describen y se muestra la distribución areal de las facies y evapofacies asociadas al ambiente evaporítico del Salar Hombre Muerto, ubicado en el borde oriental de la Puna Austral, en una zona con una amplia difusión de yacimientos de boratos. El salar puede ser dividido en dos subcuencas, la occidental y la oriental, ambas separadas por el islote central de Farallón Catal. La subcuenca oriental es boratífera, con bajo contenido en cloruros, mientras que la subcuenca occidental presenta tanto en superficie como en profundidad potentes acumulaciones de halita (hasta 900 m y es prácticamente estéril en boratos. Se plantean varias hipótesis sobre la génesis de la evapofacies boratífera, representada mineralógicamente por el borato ulexita. Esta es la evapofacies de interés económico y que se explota en el salar, donde además se extraen salmueras de litio.This paper identifies, describes and shows the areal distribution of facies and evapofacies associated with Salar Hombre Muerto, located in the eastern border of the Southern Puna, in an area with a wide diffusion of borates. The salar can be divided in two sub-basins, the western and the eastern, both separate for the central island of Farallón Catal. The eastern sub-basin is boratiferous, with low chlorides contained, while the western one shows a thick halite accumulation (up to 900 m in surface and in depth and it is practically sterile in borates. Several hypothesis on the genesis of the boratiferous evapofacies, minerallogically represented by the borate ulexite, are proposed. This evapofacies is the economic interest mined area, where lithium brines are also extracted.

  9. 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.

  10. Azpiazu, Daniel, La concentración en la industria argentina a principios del siglo XXI

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    Patricia Jerez

    2013-01-01

    Full Text Available Azpiazu, Daniel, La concentración en la industria argentina a principios del siglo XXI, Buenos Aires, Cara o Ceca/Centro Cultural de la Cooperación Floreal Gorini/Editorial Atuel, 2011 (148 págs.

  11. Children Interactions in Literacy Tutoring Situations: A Study with Urban Marginalized Populations in Argentina

    Science.gov (United States)

    Rosemberg, Celia Renata; Alam, Florencia; Stein, Alejandra

    2014-01-01

    The study analyzed the conversational exchanges through which child tutors mediated literacy abilities and knowledge with young children in the framework of the project "From Child to Child: A Tutor-Child Literacy Program," that is being conducted in Buenos Aires, Argentina. The analysis considered the conversational moves deployed by…

  12. Hydrologic transport of depleted uranium associated with open air dynamic range testing at Los Alamos National Laboratory, New Mexico, and Eglin Air Force Base, Florida

    Energy Technology Data Exchange (ETDEWEB)

    Becker, N.M. [Los Alamos National Lab., NM (United States); Vanta, E.B. [Wright Laboratory Armament Directorate, Eglin Air Force Base, FL (United States)

    1995-05-01

    Hydrologic investigations on depleted uranium fate and transport associated with dynamic testing activities were instituted in the 1980`s at Los Alamos National Laboratory and Eglin Air Force Base. At Los Alamos, extensive field watershed investigations of soil, sediment, and especially runoff water were conducted. Eglin conducted field investigations and runoff studies similar to those at Los Alamos at former and active test ranges. Laboratory experiments complemented the field investigations at both installations. Mass balance calculations were performed to quantify the mass of expended uranium which had transported away from firing sites. At Los Alamos, it is estimated that more than 90 percent of the uranium still remains in close proximity to firing sites, which has been corroborated by independent calculations. At Eglin, we estimate that 90 to 95 percent of the uranium remains at test ranges. These data demonstrate that uranium moves slowly via surface water, in both semi-arid (Los Alamos) and humid (Eglin) environments.

  13. Hydrologic transport of depleted uranium associated with open air dynamic range testing at Los Alamos National Laboratory, New Mexico, and Eglin Air Force Base, Florida

    International Nuclear Information System (INIS)

    Hydrologic investigations on depleted uranium fate and transport associated with dynamic testing activities were instituted in the 1980's at Los Alamos National Laboratory and Eglin Air Force Base. At Los Alamos, extensive field watershed investigations of soil, sediment, and especially runoff water were conducted. Eglin conducted field investigations and runoff studies similar to those at Los Alamos at former and active test ranges. Laboratory experiments complemented the field investigations at both installations. Mass balance calculations were performed to quantify the mass of expended uranium which had transported away from firing sites. At Los Alamos, it is estimated that more than 90 percent of the uranium still remains in close proximity to firing sites, which has been corroborated by independent calculations. At Eglin, we estimate that 90 to 95 percent of the uranium remains at test ranges. These data demonstrate that uranium moves slowly via surface water, in both semi-arid (Los Alamos) and humid (Eglin) environments

  14. Air quality implications associated with the selection of power plants in the Pacific Northwest

    International Nuclear Information System (INIS)

    This assessment models emission inventories and pollutant emission rates for fossil fuel power plants. Ground-level air concentration of nitrogen oxides, sulfur dioxide and TSP are predicted. Pollutant deposition, non-acidic deposition, acidic deposition, ozone impacts, and visibility attenuation are considered. Human health effects, wildlife effects, effects on plants and crops, and residual environmental impacts are estimated from predicted emissions

  15. Association between traffic-related air pollution in schools and cognitive development in primary school children: a prospective cohort study.

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    Jordi Sunyer

    2015-03-01

    Full Text Available Air pollution is a suspected developmental neurotoxicant. Many schools are located in close proximity to busy roads, and traffic air pollution peaks when children are at school. We aimed to assess whether exposure of children in primary school to traffic-related air pollutants is associated with impaired cognitive development.We conducted a prospective study of children (n = 2,715, aged 7 to 10 y from 39 schools in Barcelona (Catalonia, Spain exposed to high and low traffic-related air pollution, paired by school socioeconomic index; children were tested four times (i.e., to assess the 12-mo developmental trajectories via computerized tests (n = 10,112. Chronic traffic air pollution (elemental carbon [EC], nitrogen dioxide [NO2], and ultrafine particle number [UFP; 10-700 nm] was measured twice during 1-wk campaigns both in the courtyard (outdoor and inside the classroom (indoor simultaneously in each school pair. Cognitive development was assessed with the n-back and the attentional network tests, in particular, working memory (two-back detectability, superior working memory (three-back detectability, and inattentiveness (hit reaction time standard error. Linear mixed effects models were adjusted for age, sex, maternal education, socioeconomic status, and air pollution exposure at home. Children from highly polluted schools had a smaller growth in cognitive development than children from the paired lowly polluted schools, both in crude and adjusted models (e.g., 7.4% [95% CI 5.6%-8.8%] versus 11.5% [95% CI 8.9%-12.5%] improvement in working memory, p = 0.0024. Cogently, children attending schools with higher levels of EC, NO2, and UFP both indoors and outdoors experienced substantially smaller growth in all the cognitive measurements; for example, a change from the first to the fourth quartile in indoor EC reduced the gain in working memory by 13.0% (95% CI 4.2%-23.1%. Residual confounding for social class could not be discarded completely

  16. 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

  17. Beyond Attributable Burden: Estimating the Avoidable Burden of Disease Associated with Household Air Pollution.

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    Randall Kuhn

    Full Text Available The Global Burden of Disease (GBD studies have transformed global understanding of health risks by producing comprehensive estimates of attributable disease burden, or the current disease that would be eliminated if a risk factor did not exist. Yet many have noted the greater policy significance of avoidable burden, or the future disease that could actually be eliminated if a risk factor were eliminated today. Avoidable risk may be considerably lower than attributable risk if baseline levels of exposure or disease are declining, or if a risk factor carries lagged effects on disease. As global efforts to deliver clean cookstoves accelerate, a temporal estimation of avoidable risk due to household air pollution (HAP becomes increasingly important, particularly in light of the rapid uptake of modern stoves and ongoing epidemiologic transitions in regions like South and Southeast Asia.We estimate the avoidable burden associated with HAP using International Futures (IFs, an integrated forecasting system that has been used to model future global disease burdens and risk factors. Building on GBD and other estimates, we integrated a detailed HAP exposure estimation and exposure-response model into IFs. We then conducted a counterfactual experiment in which HAP exposure is reduced to theoretical minimum levels in 2015. We evaluated avoidable mortality and DALY reductions for the years 2015 to 2024 relative to a Base Case scenario in which only endogenous changes occurred. We present results by cause and region, looking at impacts on acute lower respiratory infection (ALRI and four noncommunicable diseases (NCDs. We found that just 2.6% of global DALYs would be averted between 2015 and 2024, compared to 4.5% of global DALYs attributed to HAP in the 2010 GBD study, due in large part to the endogenous tendency towards declining traditional stove usage in the IFs base case forecast. The extent of diminished impact was comparable for ALRI and affected NCDs

  18. Association between use of air-conditioning or fan and survival of elderly febrile patients: a prospective study.

    Science.gov (United States)

    Theocharis, G; Tansarli, G S; Mavros, M N; Spiropoulos, T; Barbas, S G; Falagas, M E

    2013-09-01

    Elderly individuals are more susceptible to excess summer heat. We sought to examine whether the use of cooling systems (air-conditioning or fan) affected the clinical outcomes of elderly febrile patients. We prospectively followed elderly (≥ 75 years old) febrile patients requesting the medical services of the SOS Doctors (a network of physicians performing house-call visits) from July 10 to August 20, 2011. Patients who used cooling systems ("users") were compared with those who did not ("non-users") regarding mortality, clinical outcome of primary illness (improvement or deterioration), and emergency hospitalization. Prospectively collected data were available for 339 individual elderly febrile patients. "Users" had lower mortality (10 % vs. 19 %, p air-conditioning and fan regarding mortality or clinical improvement, but fan use was associated with more hospitalizations (37 % vs. 19 %, p conditions), the sole variable significantly associated with mortality was the non-use of cooling systems [odds ratio (OR): 2.18, 95 % confidence interval (CI): 1.06-4.50]. The use of air-conditioning or fan during hot summer periods appeared to be beneficial for elderly febrile patients living in a large city. Large prospective studies are warranted in order to provide further insight into potential individual and public health initiatives aiming to alleviate the impact of excess summer heat on the health of elderly patients.

  19. Cell type specificity of female lung cancer associated with sulfur dioxide from air pollutants in Taiwan: An ecological study

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    Tseng Ching-Yu

    2012-01-01

    Full Text Available Abstract Background Many studies have examined the association between air pollutants (including sulfur dioxide [SO2], carbon monoxide [CO], nitrogen dioxide [NO2], nitric oxide [NO], ozone [O3], and particulate matter 10] and lung cancer. However, data from previous studies on pathological cell types were limited, especially for SO2 exposure. We aimed to explore the association between SO2 exposure from outdoor air pollutants and female lung cancer incidence by cell type specificity. Methods We conducted an ecological study and calculated annual average concentration of 6 air pollutants (SO2, CO, NO2, NO, O3, and PM10 using data from Taiwan Environmental Protection Administration air quality monitoring stations. The Poisson regression models were used to evaluate the association between SO2 and age-standardized incidence rate of female lung cancer by two major pathological types (adenocarcinoma [AC] and squamous cell carcinoma [SCC]. In order to understand whether there is a dose-response relationship between SO2 and two major pathological types, we analyzed 4 levels of exposure based on quartiles of concentration of SO2. Results The Poisson regression results showed that with the first quartile of SO2 concentration as the baseline, the relative risks for AC/SCC type cancer among females were 1.20 (95% confidence interval [CI], 1.04-1.37/1.39 (95% CI, 0.96-2.01 for the second, 1.22 (95% CI, 1.04-1.43/1.58 (95% CI, 1.06-2.37 for the third, and 1.27 (95% CI, 1.06-1.52/1.80 (95% CI, 1.15-2.84 for the fourth quartile of SO2 concentration. The tests for trend were statistically significant for both AC and SCC at P = 0.0272 and 0.0145, respectively. Conclusion The current study suggests that SO2 exposure as an air pollutant may increase female lung cancer incidence and the associations with female lung cancer is much stronger for SCC than for AC. The findings of this study warrant further investigation on the role of SO2 in the etiology of SCC.

  20. Particulate matter air pollution and cardiovascular disease: An update to the scientific statement from the American Heart Association.

    Science.gov (United States)

    Brook, Robert D; Rajagopalan, Sanjay; Pope, C Arden; Brook, Jeffrey R; Bhatnagar, Aruni; Diez-Roux, Ana V; Holguin, Fernando; Hong, Yuling; Luepker, Russell V; Mittleman, Murray A; Peters, Annette; Siscovick, David; Smith, Sidney C; Whitsel, Laurie; Kaufman, Joel D

    2010-06-01

    In 2004, the first American Heart Association scientific statement on "Air Pollution and Cardiovascular Disease" concluded that exposure to particulate matter (PM) air pollution contributes to cardiovascular morbidity and mortality. In the interim, numerous studies have expanded our understanding of this association and further elucidated the physiological and molecular mechanisms involved. The main objective of this updated American Heart Association scientific statement is to provide a comprehensive review of the new evidence linking PM exposure with cardiovascular disease, with a specific focus on highlighting the clinical implications for researchers and healthcare providers. The writing group also sought to provide expert consensus opinions on many aspects of the current state of science and updated suggestions for areas of future research. On the basis of the findings of this review, several new conclusions were reached, including the following: Exposure to PM American Heart Association scientific statement was published. Finally, PM(2.5) exposure is deemed a modifiable factor that contributes to cardiovascular morbidity and mortality.

  1. Excess winter mortality, wood fires and the uncertainties associated with air pollutants.

    Science.gov (United States)

    Moller, Peter

    2011-03-01

    There is excess mortality in the winter. To minimise this it is important that an adequate indoor temperature is maintained and this is dependent on affordable energy supplies. Standards adopted by the Ministry for the Environment in relation to levels of small particles (PM10) in the air and the Regulations to enforce their implementation are based on inadequate scientific evidence. They are likely to make heating less affordable and have a negative net effect rather than a positive one on general health. Whilst the attainment and maintenance of clean air is laudable, regulations should be based on sound scientific evidence. The costs, benefits, and equity for individuals need careful consideration, as do the implications for energy security. PMID:21681253

  2. Economic evaluation of the benefits of reducing acute cardiorespiratory morbidity associated with air pollution

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    Anis Aslam H

    2002-12-01

    Full Text Available Abstract Background Few assessments of the costs and benefits of reducing acute cardiorespiratory morbidity related to air pollution have employed a comprehensive, explicit approach to capturing the full societal value of reduced morbidity. Methods We used empirical data on the duration and severity of episodes of cardiorespiratory disease as inputs to complementary models of cost of treatment, lost productivity, and willingness to pay to avoid acute cardiorespiratory morbidity outcomes linked to air pollution in epidemiological studies. A Monte Carlo estimation procedure was utilized to propagate uncertainty in key inputs and model parameters. Results Valuation estimates ranged from $13 (1997, Canadian (95% confidence interval, $0–28 for avoidance of an acute respiratory symptom day to $5,200 ($4,000–$6,400 for avoidance of a cardiac hospital admission. Cost of treatment accounted for the majority of the overall value of cardiac and respiratory hospital admissions as well as cardiac emergency department visits, while lost productivity generally represented a small proportion of overall value. Valuation estimates for days of restricted activity, asthma symptoms and acute respiratory symptoms were sensitive to alternative assumptions about level of activity restriction. As an example of the application of these values, we estimated that the observed decrease in particulate sulfate concentrations in Toronto between 1984 and 1999 resulted in annual benefits of $1.4 million (95% confidence interval $0.91–1.8 million in relation to reduced emergency department visits and hospital admissions for cardiorespiratory disease. Conclusion Our approach to estimating the value of avoiding a range of acute morbidity effects of air pollution addresses a number of limitations of the current literature, and is applicable to future assessments of the benefits of improving air quality.

  3. Air pollution is associated with brainstem auditory nuclei pathology and delayed brainstem auditory evoked potentials

    OpenAIRE

    Calderón-Garcidueñas, Lilian; D’Angiulli, Amedeo; Kulesza, Randy J.; Torres-Jardón, Ricardo; Osnaya, Norma; Romero, Lina; Keefe, Sheyla; Herritt, Lou; Brooks, Diane M.; Avila-Ramirez, Jose; Delgado-Chávez, Ricardo; Medina-Cortina, Humberto; González-González, Luis Oscar

    2011-01-01

    We assessed brainstem inflammation in children exposed to air pollutants by comparing brainstem auditory evoked potentials (BAEPs) and blood inflammatory markers in children age 96.3± 8.5 months from highly polluted (n=34) versus a low polluted city (n=17). The brainstems of nine children with accidental deaths were also examined. Children from the highly polluted environment had significant delays in wave III (t(50)=17.038; p

  4. Datos para una historia de la psicologia experimental Argentina (hasta 1930

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    Mauricio R. Papini

    1976-01-01

    Full Text Available A presentation is made of the early origins of experimental prychology .ín Argentina from 1880 to 1930. During thís 50 year perlod the first chaira of experimental psychology were created in the country. Horacio G. Píñero founded the 6rst experimental psYchology laboratory in 11198,- al the Colegio Nacional of Buenos Aires. During tbis period ltriiger. Dumas. Janet and Kohler visited Argentina. After 1980 Argentinian psychology turned to Irratíonalism, and away from experímentatíon.

  5. Dos décadas de avatares en las relaciones bilaterales Argentina-Irán

    OpenAIRE

    Stanganelli, Isabel Cecilia

    2003-01-01

    A fines de agosto 2003 el gobierno de Irán anunció la suspensión de las relaciones comerciales y culturales con Argentina, debido a la detención en el Reino Unido del que fuera embajador de Irán en Buenos Aires en julio 1994, cuando ocurrió el atentado contra la AMIA. Desde la partida del diplomático - ocurrida poco tiempo después-, las relaciones entre Argentina e Irán quedaron disminuidas en el nivel de encargados de negocios. (Párrafo extraído del texto a modo de resumen)

  6. Association of particulate air pollution and secondhand smoke on endothelium-dependent brachial artery dilation in healthy children

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    Mohammad Hashemi

    2012-01-01

    Full Text Available Background: This study aimed to determine the association of particulate matters with endothelial function, measured by flow mediated dilation (FMD of brachial artery, in children with or without exposure to secondhand smoke. Methods: This cross-sectional study was conducted from January to March 2011 in Isfahan, which is the second large and air-polluted city in Iran. The areas of the city with lowest and highest air pollution were determined, and in each area, 25 prepubescent boys with or without exposure to daily tobacco smoke in home were selected, i.e. 100 children were studied in total. Results: FMD was significantly smaller in those living in high-polluted area and those exposed to secondhand smoke. Multiple linear regression analysis, adjusted for age and body mass index, showed that both passive smoking status and living area in terms of particulate air pollution were effective determinants of the brachial artery diameter. The standardized coefficient of passive smoking status was –0.36 (SD = 0.09, P < 0.0001 showing negative association with percent increase in FMD. Likewise, the percent increase in brachial artery diameter was lower in passive smoker children. Similar relationship was documented for PM 10 concentration with a regression coefficient of –0.32 (SD = 0.04, P < 0.0001. Without considering passive smoking variable, PM 10 concentration has significant independent effect on FMD level. Conclusion: Our findings provide evidence on the association of environmental factors on endothelial dysfunction from early life. Studying such associations among healthy children may help identify the underlying mechanisms. The clinical implications of environmental factors on early stages of atherosclerosis should be confirmed in longitudinal studies.

  7. A GIS Based Approach for Assessing the Association between Air Pollution and Asthma in New York State, USA

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    Amit K. Gorai

    2014-05-01

    Full Text Available Studies on asthma have shown that air pollution can lead to increased asthma prevalence. The aim of this study is to examine the association between air pollution (fine particulate matter (PM2.5, sulfur dioxide (SO2 and ozone (O3 and human health (asthma emergency department visit rate (AEVR and asthma discharge rate (ADR among residents of New York, USA during the period 2005 to 2007. Annual rates of asthma were calculated from population estimates for 2005, 2006, and 2007 and number of asthma hospital discharge and emergency department visits. Population data for New York were taken from US Bureau of Census, and asthma data were obtained from New York State Department of Health, National Asthma Survey surveillance report. Data on the concentrations of PM2.5, SO2 and ground level ozone were obtained from various air quality monitoring stations distributed in different counties. Annual means of these concentrations were compared to annual variations in asthma prevalence by using Pearson correlation coefficient. We found different associations between the annual mean concentration of PM2.5, SO2 and surface ozone and the annual rates of asthma discharge and asthma emergency visit from 2005 to 2007. A positive correlation coefficient was observed between the annual mean concentration of PM2.5, and SO2 and the annual rates of asthma discharge and asthma emergency department visit from 2005 to 2007. However, the correlation coefficient between annual mean concentrations of ground ozone and the annual rates of asthma discharge and asthma emergency visit was found to be negative from 2005 to 2007. Our study suggests that the association between elevated concentrations of PM2.5 and SO2 and asthma prevalence among residents of New York State in USA is consistent enough to assume concretely a plausible and significant association.

  8. Dusty Air Pollution is Associated with an Increased Risk of Allergic Diseases in Southwestern Part of Iran.

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    Mohammad Kazzem Gheybi

    2014-12-01

    Full Text Available Concerns have been raised about the adverse impact of dusty air pollution (DAP on human health. The aim of this study was to find the association between dusty air pollution based on air quality index (AQI and the risk of allergic diseases in southwestern provinces of Iran, with assessing cytokine profiles and lymphocyte immunophenotypes.In this case control study 148 individuals participated. The sampling was done in hazardous condition (AQI>300 as the case and clean air (AQI<50 as the control. We measured cytokine production by using ELISA method and phenotypes of T-lymphocytes (CD4+ and CD8+, CD19+ B-lymphocytes, CD25+, CD4+ CD25+ cells by FACSort flow cytometer.The mean serum level of IL-4 (33.4 ± 2.9 vs 0.85 ± 0.65 pg/dl and IL-13 (15.1 ± 4.4 vs. 0.12 ± 0.7 pg/dl in the subjects exposed to ambient DAP was increased significantly compared to the individuals in the clean air condition. Also, CD19+ B-lymphocytes (12.6 ± 4.9 vs 8.9 ± 3.2% and CD4+ CD25+ cell count (13.6 ± 4.6 vs 7.7 ± 3.8% in peripheral blood were increased significantly in subjects exposed to ambient DAP compared with the controls.The result of our study suggested that ambient DAP affected immune system in a way that might lead to allergic diseases in the population.

  9. Nuclear energy regulation in Argentina

    International Nuclear Information System (INIS)

    The Nuclear Regulatory Authority was established as an autonomous body reporting to the Presidency of Argentina by Act known as the Nuclear Activity National Act, and is empowered to regulate and control the nuclear activity with regard to radiation and nuclear safety, physical protection and nuclear non-proliferation issues. This report details functions and competence of the regulatory body in order to preserve its own independent criterion regarding every aspect of radiological and nuclear safety, and the global strategy of the regulatory system, which are concentrated in the following basics aspects: issue of the corresponding standards; execution of regulatory inspections and audits to verify the compliance with granted licenses and authorisations; independent execution of analyses and studies for the licensing process of nuclear installations; development of technical and scientific aspects associated to radiological and nuclear safety; training of personnel involved in radiological and nuclear safety, either belonging to the Regulatory Body or those working in installations, which perform practices under control. The regulatory control activities are carried out with independence of technical opinions and decisions; administrative autarchy; legal capacity to act in the field of public and private rights, and qualified personnel. The regulatory system complies with the concept of safety culture and its development, and the commitment to nuclear power plants' safety is made clear in design or operation concepts giving priority to safety over economic rentability of the installations. The compliance with Maintenance Programs, In-service Inspection Programs and good operation practices are also part of the commitment. This paper describes the organisational structure of the regulatory body, its human resources, personnel qualification and training, and the necessary financial resources. The regulatory body issues and establishes the standards, which regulate and

  10. Association between changes in exposure to air pollution and biomarkers of oxidative stress in children before and during the Beijing Olympics

    OpenAIRE

    Lin, Weiwei; Zhu, Tong; Xue, Tao; Peng, Wei; Brunekreef, Bert; Gehring, Ulrike; Huang, Wei; Hu, Min; Zhang, Yuanhang; Tang, Xiaoyan

    2015-01-01

    It is not known whether exposure to air pollutants causes systemic oxidative stress in children. We investigated the association between exposure to air pollution and biomarkers of oxidative stress in relation to a governmental air quality intervention implemented during the 2008 Beijing Olympic Games. We studied 36 schoolchildren during 5 time periods before and during the Olympic Games in Beijing (June 2007-September 2008). The oxidative stress biomarkers 8-oxo-7,8-dihydro-2'-deoxyguanosine...

  11. Exposure to Traffic-related Air Pollution During Pregnancy and Term Low Birth Weight: Estimation of Causal Associations in a Semiparametric Model

    OpenAIRE

    Padula, Amy M.; Mortimer, Kathleen; Hubbard, Alan; Lurmann, Frederick; Jerrett, Michael; Tager, Ira B.

    2012-01-01

    Traffic-related air pollution is recognized as an important contributor to health problems. Epidemiologic analyses suggest that prenatal exposure to traffic-related air pollutants may be associated with adverse birth outcomes; however, there is insufficient evidence to conclude that the relation is causal. The Study of Air Pollution, Genetics and Early Life Events comprises all births to women living in 4 counties in California's San Joaquin Valley during the years 2000–2006. The probability ...

  12. Air Pollution and Lung Function in Dutch Children: A Comparison of Exposure Estimates and Associations Based on Land Use Regression and Dispersion Exposure Modeling Approaches

    OpenAIRE

    Wang, Meng; Gehring, Ulrike; Hoek, Gerard; Keuken, Menno; Jonkers, Sander; Beelen, Rob; Eeftens, Marloes; Dirkje S Postma; Brunekreef, Bert

    2015-01-01

    Background There is limited knowledge about the extent to which estimates of air pollution effects on health are affected by the choice for a specific exposure model. Objectives We aimed to evaluate the correlation between long-term air pollution exposure estimates using two commonly used exposure modeling techniques [dispersion and land use regression (LUR) models] and, in addition, to compare the estimates of the association between long-term exposure to air pollution and lung function in c...

  13. Association between traffic-related air pollution, subclinical inflammation and impaired glucose metabolism: results from the SALIA study.

    Directory of Open Access Journals (Sweden)

    Tom Teichert

    Full Text Available BACKGROUND: Environmental and lifestyle factors regulate the expression and release of immune mediators. It has been hypothesised that ambient air pollution may be such an external factor and that the association between air pollution and impaired glucose metabolism may be attributable to inflammatory processes. Therefore, we assessed the associations between air pollution, circulating immune mediators and impaired glucose metabolism. METHODS: We analysed concentrations of 14 pro- and anti-inflammatory immune mediators as well as fasting glucose and insulin levels in plasma of 363 women from the Study on the influence of Air pollution on Lung function, Inflammation and Aging (SALIA, Germany. Exposure data for a group of pollutants such as nitrogen oxides (NO2, NOx and different fractions of particulate matter were available for the participants' residences. We calculated the association between the pollutants and impaired glucose metabolism by multiple regression models. RESULTS: The study participants had a mean age of 74.1 (SD 2.6 years and 48% showed impaired glucose metabolism based on impaired fasting glucose or previously diagnosed type 2 diabetes. Only long-term exposure NO2 and NOx concentrations showed positive associations (NO2: OR 1.465, 95% CI 1.049-2.046, NOx: OR 1.409, 95% CI 1.010-1.967 per increased interquartile range of NO2 (14.65 µg/m(3 or NOx (43.16 µg/m(3, respectively, but statistical significance was lost after correction for multiple comparisons. Additional adjustment for circulating immune mediators or the use of anti-inflammatory medication had hardly any impact on the observed ORs. CONCLUSIONS: Our results suggest that exposure to nitrogen oxides may contribute to impaired glucose metabolism, but the associations did not reach statistical significance so that further studies with larger sample sizes are required to substantiate our findings. Our data do not preclude a role of inflammatory mechanisms in adipose or

  14. The origins and professionalization of cognitive psychotherapy in Argentina.

    Science.gov (United States)

    Korman, Guido Pablo; Viotti, Nicolás; Garay, Cristian Javier

    2015-05-01

    The growing popularity of cognitive-behavioral therapy (CBT) has helped reshape the mental health scene in the city of Buenos Aires, historically the stronghold of psychoanalysis. In the early 1980s, CBT was infrequently used and sometimes overtly resisted in the field of mental health. Almost 3 decades later, the impact of CBT has increased dramatically in Argentina, not only in independent practice but also in the health system and in everyday life. This article aims to describe the process by which Argentine psychotherapists first adopted this new theoretical framework. PMID:26120921

  15. Home Financing Institutions in Argentina

    OpenAIRE

    Marcela Cristini; Ramiro Moya

    2004-01-01

    (Available only in Spanish) This work analyses the case of the deepening of mortgage lending in Argentina in the 1990s and compares it with the failure of the 1980s. It shows that macroeconomic stability determines the development of the market and that a rapid takeoff can be achieved with the appropriate legal and market institutions (competition between banks and dollar contracts). The real price of property, and unemployment influence the performance of the market, which expands at the rat...

  16. [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

  17. Costs of publicly provided maternity services in Rosario, Argentina Los costos de servicios maternos públicos en Rosario, Argentina

    OpenAIRE

    Josephine Borghi; Silvia Bastus; María Belizan; Guillermo Carroli; Guy Hutton; Julia Fox-Rushby

    2003-01-01

    OBJECTIVE: This study estimates the costs of maternal health services in Rosario, Argentina. MATERIAL AND METHODS: The provider costs (US$ 1999) of antenatal care, a normal vaginal delivery and a caesarean section, were evaluated retrospectively in two municipal hospitals. The cost of an antenatal visit was evaluated in two health centres and the patient costs associated with the visit were evaluated in a hospital and a health centre. RESULTS: The average cost per hospital day is $114.62. The...