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Sample records for caetite ba aspectos

  1. Chemical correlations in Caetite (BA) region, Brazil

    International Nuclear Information System (INIS)

    Brazil's economic situation is responsible for an urgent demand for energy. There are several ways to generate energy, in some localities of our country, energy generation occurs almost exclusively by nuclear route, as in Rio de Janeiro state. Brazil has the sixth largest reserve of the uranium ore in the world. Nowadays there is only one mine under exploration (Uraniferous District of Lagoa Real - Caetite-BA). Unfortunately, nuclear power generation is better known, by common citizen, more for its unwanted effects than for its benefits. This fact is also powered by some Non-Governmental Organizations (NGOs), such as Greenpeace, who claim the uranium mine is dangerous since it causes environmental contamination. However, Industrias Nucleares do Brasil (INB) rejected these accusations. In a previous study, we demonstrated that doses of the Caetite (BA) population are consistent with those usually found in other countries. We stated also the higher concentration of 238U determined, in only one water sample, is probably due to natural processes, as soil leaching. In order to verify the existing natural processes, macro and micro chemical elements present in water and soil samples collected in the Caetite (BA) region were determined by ICP-MS. The results were transformed into dendrograms where chemical correlations are evidenced and they are consistent with existing natural chemical processes. It was also possible to observe a correlation between samples corroborating with the Geographic Information Systems data to be presented in this same scientific event. (author)

  2. Evaluation of natural radioactivity in superficial and underground drinking water, from the Caetite region, BA

    International Nuclear Information System (INIS)

    Brazil has the seventh greatest geological uranium reserve in the world with approximately 310 thousand tons. The Lagoa Real Uranium Province, in the region of Caetite and Lagoa Real, situated in South Center Bahia, is considered the most important monomineralic province in Brazil. Urban population who lives in the uranium district in the cities of Caetite, Lagoa Real and Livramento de Nossa Senhora uses drinking water originated from public supply. In the rural area, characterized by frequent draughts, residents receive water from digged and drilled wells and from small dams and reservoirs, as well, which are supplied by the rains. This work determined the levels of total alpha and beta radioactivity and the uranium concentrations in several kinds of water consumed by urban and rural population from the Lagoa Real Uranium Province. Total α and β activities were determined with a low-level gas flow proportional detector. The uranium concentrations were determined with an inductive coupled plasma-mass spectrometer (ICP-MS). The results obtained were confronted with the latest World Health Organization's recommendations from 2011, the ordinance number 2914 of December 12 2011 from the Health Ministry and CONAMA's resolutions. Natural radiation levels varied from 0,0041 ± 0,0004 Bq.L-1 to 0,80 ± 0,04 Bq.L-1 for total alpha activity and from 0,045 ± 0,003 to 3,00 ± 0,2 Bq.L-1 for total beta activity. Having the WHO and the HM as parameter, just two underground water samples, one located in the city of Lagoa Real and the other in the city of Caetite presented total alpha concentration above the value of 0,5 Bq.L-1 described in its recommendations, 0,80 ± 0,040 Bq.L-1 and 0,57 ± 0,03 Bq.L-1 respectively. For total beta three samples presented radioactivity levels above the 1 Bq.L-1 limit recommended by the WHO and established by the Health Ministry; 3,00 ± 0,2 Bq.L-1; 1,63 ± 0,13 Bq.L-1 and 1,19 ± 0,07 Bq.L-1., all of them situated in the Lagoa Real town. Two

  3. Water management of the uranium production facility in Brazil (Caetite, BA): potential impacts over groundwater quality

    International Nuclear Information System (INIS)

    The uranium unit of Caetite - in charge of all the 'yellow cake' produced in Brazil - is located in the semi-arid Northeast region at Bahia State. The geological uranium content of the ore is 3000 ppm, which is mainly associated with albite (NaAlSi8O8), and its extraction is achieved by means of a Heap-Leach process. This process has a low water demand, which is supplied by a network of wells, but can contribute to change the groundwater quality and in some cases the extinguishing of wells was observed. The managing of liquid mining wastes formed by drainage waters from mine pit and solid waste piles is not enough to avoid unwarranted releases in the environment, which turn necessary the waste treatment through passing them into the industrial plant in order to reduce radionuclide concentrations. The groundwater is Na-HCO3 type water and relative high concentration of Cl are observed in some groundwater. It seems that levels of uranium in groundwaters are mainly a consequence of the complexation of the metal by carbonates (or other anions) and not by any sort of the contamination of these waters by the drainage accumulated in the open pit. The speciation modelling allows identifying some areas where the replenishment of the aquifer is more active, but in general the recharge is a fast process run by direct infiltration. The stable isotope data (δ2H and δ18O) showed that evaporation plays a role during the infiltration, causing the groundwater salinization. These data discard the possibility that groundwater salinization was caused by discharge of deeper saline groundwater through faults associated to a regional groundwater flow system. The presence of an active shallow groundwater flow system offers better possibility for sustainable use of the groundwater resources in this semi-arid region of Brazil. (author)

  4. Water management of the uranium production facility in Brazil (Caetite, BA). Potential impacts over groundwater quality

    International Nuclear Information System (INIS)

    The uranium unit of Caetite - in charge of all the 'yellow cake' produced in Brazil - is located in the semi-arid Northeast region at Bahia State. The geological uranium content of the ore is 3000 ppm, which is mainly associated with albites (NaAlSi8O8), and its extraction is achieved by means of a Heap-Leach process. This process has a low water demand, which is supplied by a network of wells, but can contribute to change the groundwater quality and in some cases the extinguishing of wells was observed. The managing of liquid mining wastes formed by drainage waters from mine pit and solid waste piles is not enough to avoid unwarranted releases in the environment, which turn necessary the waste treatment through passing them into the industrial plant in order to reduce radionuclide concentrations. The groundwater is Na-HCO3 type water and relative high concentration of Cl are observed in some groundwater. It seems that levels of uranium in groundwaters are mainly a consequence of the complexation of the metal by carbonates (or other anions) and not by any sort of the contamination of these waters by the drainage accumulated in the open pit. The speciation modelling allows identifying some areas where the replenishment of the aquifer is more active, but in general the recharge is a fast process run by direct infiltration. The stable isotope data (δ 2H and δ 18O) showed that evaporation plays a role during the infiltration, causing the groundwater salinization. These data discard the possibility that groundwater salinization was caused by discharge of deeper saline groundwater through faults associated to a regional groundwater flow system. The presence of an active shallow groundwater flow system offers better possibility for sustainable use of the groundwater resources in this semi-arid region of Brazil. (author)

  5. Results of solid state nuclear track detector technique application in radon detection, by alpha particles tracks, for uranium prospecting in Caetite (BA-Brazil)

    International Nuclear Information System (INIS)

    The solid state nuclear track detector technique has been used in radon detection, by alpha particles tracks for uranium prospecting on the ground in Caetite city (Bahia-Brazil). The sensitive film to alpha particles used were CA 8015 exposed during 15 days and the results of three anomalies of this region are showed in a form of maps, made with the density of tracks obtained, and were compared with scintillation counter measurements. The technique showed to be simple and an effective auxiliary for the prospection of uranium ore bodies. The initial uranium exploration costs can be reduced by using this technique. (author)

  6. Anatomia dos órgãos vegetativos de Hymenaea martiana Hayne (Caesalpinioideae-Fabaceae): espécie de uso medicinal em Caetité-BA Anatomy of vegetative organs of Hymenaea martiana Hayne (Fabaceae-Caesalpinioideae): a species of medicinal use in Caetité-Bahia State, Brazil

    OpenAIRE

    Silva, M.S.; K.R.B. Leite; M.D. Saba

    2012-01-01

    Hymenaea martiana Hayne (Fabaceae-Caesalpinioideae) apresenta grande valor na medicina popular em Caetité. A casca, entrecasca do caule e a resina, são utilizadas no tratamento de diversos males. Neste estudo são apresentadas a caracterização anatômica e histoquímica dos órgãos vegetativos. Amostras foram coletadas e processadas segundo técnicas usuais em anatomia vegetal e histoquímica. Todos os órgãos apresentam, em visão transversal, epiderme unisseriada e cavidades secretoras. Cutícula es...

  7. Anatomia dos órgãos vegetativos de Hymenaea martiana Hayne (Caesalpinioideae-Fabaceae: espécie de uso medicinal em Caetité-BA Anatomy of vegetative organs of Hymenaea martiana Hayne (Fabaceae-Caesalpinioideae: a species of medicinal use in Caetité-Bahia State, Brazil

    Directory of Open Access Journals (Sweden)

    M.S. Silva

    2012-01-01

    Full Text Available Hymenaea martiana Hayne (Fabaceae-Caesalpinioideae apresenta grande valor na medicina popular em Caetité. A casca, entrecasca do caule e a resina, são utilizadas no tratamento de diversos males. Neste estudo são apresentadas a caracterização anatômica e histoquímica dos órgãos vegetativos. Amostras foram coletadas e processadas segundo técnicas usuais em anatomia vegetal e histoquímica. Todos os órgãos apresentam, em visão transversal, epiderme unisseriada e cavidades secretoras. Cutícula espessa ocorre em todos os órgãos aéreos. A raiz é tetrarca. Colênquima lacunar foi encontrado no caule. Bainha de fibras esclerenquimáticas envolve os feixes vasculares dos órgãos aéreos. Células pétreas ocorrem no pecíolo. Tricomas tectores ocorrem em ambas as faces da folha. A folha é hipoestomática com estômatos paracíticos e o mesofilo é dorsiventral. Cristais de oxalato de cálcio ocorrem no caule, pecíolo e lâmina foliar. Compostos fenólicos ocorrem na raiz, pecíolo e nervura central da folha. Grãos de amido ocorrem na raiz, caule e pecíolo. Lipídios ocorrem em todos os órgãos. Acredita-se que compostos fenólicos e cavidades secretoras de resina podem justificar a utilidade medicinal da espécie pela população de Caetité.Hymenaea martiana Hayne (Fabaceae-Caesalpinioideae shows a great value in folk medicine in Caetité. Its bark, stem-bark and resin are used to treat various ailments. In this study, the anatomical and histochemical characterization of vegetative organs is reported. Samples were collected and processed according to usual techniques of plant anatomy and histochemistry. All organs have, by cross-sectional view, uniseriate epidermis and secretory cavities. Thick cuticle occurs in all aerial organs. The root is tetrarch. Lacunar collenchyma was found in the stem. Sclerenchymatic sheath of fibers surrounds the vascular bundles of the aerial organs. Stone cells occur in the petiole. Trichomes occur

  8. Aerial gamma spectrometry of the uranium province of Lagoa Real (Caetite, BA, Brazil): go environmental aspects and distribution of the absorbed dose in the air; Espectrometria gama aerea da provincia uranifera de Lagoa Real (Caetite, BA): aspectos geoambientais e distribuicao da dose absorvida no ar

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Esau Francisco Sena

    2006-07-01

    In the present study, it was analyzed the surface concentrations of the natural radioelements K, U and Th, as well as the absorbed dose rate in air caused by gamma radiation from the Lagoa Real uranium province, which is located at the center southern portion of Bahia State and comprises an area of approximately 4.600 Km{sup 2}. Data from the airborne gamma ray spectrometric survey of the region (Sao Timoeo Project) carried out in 1979, was used in this study. Besides, recent data of U, Th and absorbed dose rates from the Environmental Monitoring Program of the uranium concentration plant (URA), operated in the region by the Brazilian Nuclear Industries (INB), were used with the aim of inter compare the sampling points in the same geo referenced area. Imaging geo processing software's give support to frame maps of surface concentrations and ternary maps, as well as allow the integration of these with other themes (e.g. hydrology, geology, pedology) favouring the interpretation of geo environmental process from the radioactive cartography. Considering the whole study area, it was obtained the following mean values: absorbed dose rate in air (61,08 nGy.h{sup -1}), Potassium (1,65 % K) , Uranium (3,02 ppm eU) and thorium (18,26 ppm eTh). The geological unities bounding the uranium anomalies were placed in the areas characterized by the highest values of radioelements and, as expected, the major dose levels. The use of ternary maps coupled with the geology and hydrology allowed distinguishing the relationship between the surface distribution of natural radioelements and the geo environmental aspects, including the influence of the catchment in their transport and migration. (author)

  9. Aspectos da vulnerabilidade ambiental na Bacia do Rio Corrente-BA

    OpenAIRE

    Creuza Lage; Heraldo Peixoto; Cláudia Margarete Batista Vieira

    2009-01-01

    A Bacia do Rio Corrente é um exemplo expressivo dos problemas ambientais das bacias do Oeste Baiano. O crescente desenvolvimento econômico nesse espaço vem provocando conflitos relacionados à demanda de água pela irrigação e pela geração de energia elétrica, somando-se a essas questões os processos de degradação ambiental. Analisar aspectos da vulnerabilidade da Bacia é a finalidade deste trabalho, que pretende oferecer subsídios às estratégias que permitam sua revitalização e integração no p...

  10. Aspectos da vulnerabilidade ambiental na Bacia do Rio Corrente-BA

    Directory of Open Access Journals (Sweden)

    Creuza Lage

    2009-03-01

    Full Text Available A Bacia do Rio Corrente é um exemplo expressivo dos problemas ambientais das bacias do Oeste Baiano. O crescente desenvolvimento econômico nesse espaço vem provocando conflitos relacionados à demanda de água pela irrigação e pela geração de energia elétrica, somando-se a essas questões os processos de degradação ambiental. Analisar aspectos da vulnerabilidade da Bacia é a finalidade deste trabalho, que pretende oferecer subsídios às estratégias que permitam sua revitalização e integração no processo produtivo da Bacia do Rio São Francisco. As unidades de paisagem - UIPs da Bacia do Rio Corrente foram classificadas de acordo com o seu grau de vulnerabilidade ambiental a partir do modelo da Ecodinâmica de Tricart, quantificado através do uso do geoprocessamento, o que permitiu uma análise integrada da paisagem. Os riscos ambientais identificados difundem-se pelas UIPs, classificados em graus diferenciados de vulnerabilidade e refletem as ações atinentes à produção do espaço regional. Os programas e projetos de desenvolvimento implantados na área, tanto pelo poder público quanto o privado, não levaram em conta as relações sociedade/natureza, insistindo, na sua maioria, por atividades nitidamente exploratórias, sem a contrapartida dos estudos sobre a capacidade de sustentabilidade dos ecossistemas regionais.

  11. Aspectos de la traducción en chino moderno. Un breve estudio sobre Ba Jin y su traducción de Castelao

    OpenAIRE

    Chen, Da

    2015-01-01

    La traducción de textos originalmente escritos en español llevada a cabo por escritores chinos del siglo XX nos ofrece una oportunidad para explorar algunos aspectos de la teoría de la traducción en la China contemporánea y nos permite acercarnos a la noción de la interculturalidad en la era de la globalización. Este trabajo analiza la traducción de breves fragmentos de textos de Castelao (1886-1950) realizada por el célebre escritor Ba Jin 巴金 (1904-2005). El objetivo principal es analizar la...

  12. Determination of the concentration of radionuclides in soil and water next the uranium mine of Caetite, Bahia, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Almeida, Geangela M.; Souza, Susana O. [Federal University of Sergipe (UFS), Sao Cristovao, SE (Brazil). Dept. of Physics; Campos, Simara S.S. [State University of Southwest Bahia (UESB), Itapetinga, BA (Brazil). Dept. of Basic and Instrumental Studies; Gennari, Roseli F., E-mail: rgennari@dfn.if.usp.b [University of Sao Paulo (USP), Sao Paulo, SP (Brazil). Inst. of Physics. Dept. of Nuclear Physics

    2011-07-01

    The economic growing in Brazil is responsible for an urgent demand for energy. Uranium is the fuel used to generate nuclear power. Brazil has the sixth largest reserve of the uranium ore in the world and, nowadays there is only one mine under exploration (Uraniferous District of Lagoa Real - Caetite-BA). Some Non-Governmental Organizations (NGOs), such as Greenpeace, state that the explored uranium mine is dangerous and polluting, causing water contamination by uranium. So, the population would be receiving radiation doses above permissible limits. However, Industrias Nucleares do Brasil (INB) the company in charge of the complex extraction and production of yellow cake rejected these accusations. The main purpose of this work is the determination of the composition of natural radionuclides in the Uraniferous District of Lagoa Real in order to determine if the nearest population is exposed to environmental radiation. It was checked if there is water contamination due to the natural transport in the uranium mining surroundings. Soil and water samples from Caetite mine and also from nearby town were collected. Only one water sample collected had concentrations higher than the limits recommended by World Health Organization. The presence of radionuclides in soil samples is considered independent of mineral exploration. The effective dose rates in almost all samples are above the world average which is 2.4 mSv/y. To sum up, the presence of uranium in water and soil of the tested areas is probably due to the nature of the soil and not to the exploration of mine. (author)

  13. Determination of the concentration of radionuclides in soil and water next the uranium mine of Caetite, Bahia, Brazil

    International Nuclear Information System (INIS)

    The economic growing in Brazil is responsible for an urgent demand for energy. Uranium is the fuel used to generate nuclear power. Brazil has the sixth largest reserve of the uranium ore in the world and, nowadays there is only one mine under exploration (Uraniferous District of Lagoa Real - Caetite-BA). Some Non-Governmental Organizations (NGOs), such as Greenpeace, state that the explored uranium mine is dangerous and polluting, causing water contamination by uranium. So, the population would be receiving radiation doses above permissible limits. However, Industrias Nucleares do Brasil (INB) the company in charge of the complex extraction and production of yellow cake rejected these accusations. The main purpose of this work is the determination of the composition of natural radionuclides in the Uraniferous District of Lagoa Real in order to determine if the nearest population is exposed to environmental radiation. It was checked if there is water contamination due to the natural transport in the uranium mining surroundings. Soil and water samples from Caetite mine and also from nearby town were collected. Only one water sample collected had concentrations higher than the limits recommended by World Health Organization. The presence of radionuclides in soil samples is considered independent of mineral exploration. The effective dose rates in almost all samples are above the world average which is 2.4 mSv/y. To sum up, the presence of uranium in water and soil of the tested areas is probably due to the nature of the soil and not to the exploration of mine. (author)

  14. Aspectos da anatomia e do óleo essencial em folhas de Pindaíba (Xylopia brasiliensis Spreng. Aspects of the anatomy and essential oil in leaves of pindaíba (Xylopia brasiliensis Spreng.

    Directory of Open Access Journals (Sweden)

    Breno Régis Santos

    2004-04-01

    Full Text Available Neste trabalho, estudaram-se aspectos de anatomia foliar, extraiu-se e caracterizou-se o óleo essencial presente nos tecidos foliares de pindaíba (Xylopia brasiliensis. Os cortes transversais foram realizados à mão livre com o auxílio de uma lâmina de barbear e submetidos ao processo de coloração com safranina e azul de astra. A extração e a caracterização do óleo essencial foram realizadas pela técnica de arraste de vapor de água. Na seção transversal da folha da pindaíba foi observada a presença de cavidade oleífera, sendo o óleo constituído principalmente de óxido de cariofileno.Aspects of leaf anatomy, extraction and characterization of essential oils present in leaf tissues of Pindaíba (Xylopia brasiliensis, were studied. The anatomical cuts were manually performed and their visualization were made through a coloration process using safranine and astra blue. The extraction and characterization of the essential oil used the steam drag’s method. With these studies it was observed the presence of oily idioblasts filled mainly with cariophylene oxide.

  15. Preliminary studies on fluid inclusions in metasomatic albite grains from Lagoa Real, Caetite, Ba, Brazil

    International Nuclear Information System (INIS)

    Preliminary fluid inclusion studies in metasomatic albite grains from the Lagoa Real uranium deposit pointed out to mixing of strong brines (23 wt% NaCl equivalent) with low salinity fluids (2.3 wt% NaCl equivalent). Microthermometry and crushing tests indicated elevated pressures and the presence of hidrocarbons in larger amount than CO2. The remobilization of uranium as uranyl carbonate complexes and its precipitation, reducing U6+ to U4+ by CH4, is considered as a possibility. (Author)

  16. Occupational program monitoring in Uranium Concentrate Unity at Caetite (URA) - Bahia State, Brazil: bioassay program

    International Nuclear Information System (INIS)

    The principal aim of bioassay monitoring program in Uranium Concentrate Unity, URA, in Caetite is the maintenance of acceptably safe and satisfactory working conditions, according to national and international norms. Specifically, the objective is to interpret measurements in terms of intake of uranium and committed effective dose, so that the results can be used to demonstrate compliance with the system of dose limitation and, mainly, the optimization of radiation protection. The employed technique is the measurement of uranium in excreta from workers in mine, crushing and uranium concentrate production areas. In conclusion, workers from mining and crushing areas should be monitored by the routine program; urine and feces samples should be analyzed by mass spectrometry, with ICP-MS. The operational monitoring program should be carried out in workers from uranium concentrate production area; urine and feces samples should be analyzed by less expensive techniques. (author)

  17. Seismic refraction technique aplications in the geotechnical characterization of the Cachoeira deposit massif, Caetite, State of Bahia, Brazil

    International Nuclear Information System (INIS)

    Geophysical surveys throught the Cachoeira Uranium deposit massif were carried out with the purpose of assisting in the geotechnical characterization for the implantation of the Mining-Industrial Complex projects on the Lagoa Real uranium deposits, Caetite municipality, state of Bahia, Brazil. This study discusses the methodology utilized in the geophysical surveys and their results as well as their applications to the geotechnical characterization as a whole. (D.J.M.)

  18. Converting the Caetite mill process to enhance uranium recovery and expand production

    International Nuclear Information System (INIS)

    Full text: The Caetite uranium mill, located in Caetite - Bahia - Brazil, was commissioned in 2000 to produce about 880 000 pounds of uranium oxide per year from an uranium ore averaging 0.29% U3O8. The milling process starts with ore crushing followed by heap leaching with sulfuric acid solution to generate a pregnant leaching solution (PLS) containing about 2.5 g U3O8/L. Uranium separation and purification is carried out by solvent extraction with a kerosene solution of tertiary amine followed by stripping with an acidified sodium chloride aqueous solution. Uranium is precipitated as ammonium diuranate that is washed, filtered and dried. The historical average uranium recovery from this process is about 76%. As the Brazilian government has confirmed recently its plans to start building the third nuclear power plant in 2009, the Brazilian uranium production will have to double its capacity in the next two years. To fulfill the increasing demand, a change in the Caetite's milling process is being evaluated in order to not only increase the production but also the uranium recovery. In the new milling flow sheet the heap leaching process is changed to conventional tank agitated leaching of a - 0.59 mm ground ore slurry in sulfuric acid medium. Batch and pilot plant essays has shown that the uranium recovery increases to about 93% under the following conditions: grind size: -0.59 mm; slurry density: 65 solids wt%; leaching time: 4 hours; temperature: 60 deg C; oxidation potential: ∼500 mV; acid concentration in the PLS: ∼10 g/L. As the use of sodium chloride as the stripping agent has presented detrimental effects in the extraction/stripping process once all the process water is recycled, two alternative process are being evaluated for the uranium recovery from the PLS: (a) uranium peroxide precipitation at a controlled pH from a PLS that was firstly neutralized with ground limestone to pH 3.2 and filtered. Batch essays have shown good results with a final

  19. Occupational monitoring programme of uranium concentrate unit in Caetite, Brazil: Bioassay programme

    International Nuclear Information System (INIS)

    Full text: The principal aim of the bioassay monitoring program in the Uranium Concentrate Unity in Caetite is the maintenance of acceptable safe and satisfactory working conditions, according to national and international norms. Specifically, the objective is to interpret measurements in terms of intake of uranium and committed effective dose, so that the results can be used to demonstrate compliance with the system of dose limitation and, mainly, the optimization of radiation protection. The employed technique is the measurement of uranium in excreta from workers in mine, crushing and uranium concentrate production areas. The present work also aims at reporting the analysis results of incorporation of natural uranium, from bio analyses of urine on routine for class y insoluble uranium (ore dust) and operational monitoring for class D solubility uranium (Ammonium Diuranate), and committed effective dose estimates of workers occupationally exposed. In conclusion, workers from the mining and crushing areas should be monitored by the routine program; urine and feces samples should be analysed by mass spectrometry, with ICPMS. The operational monitoring program should be carried out in workers from the uranium concentrate production area; urine and feces samples may be analysed by less expensive techniques. For routine monitoring, based on the Mann-whitney Test, data from baseline monitoring were considered statistically equal to data from routine monitoring. Only three of out 24 workers showed results higher than the baseline, generating calculation of committed effective dose. However, none of them reached values bigger than those allowed to workers in Brazilian regulations. For operational monitoring the same behavior described above is repeated, with baseline data considered statistically equal to operational monitoring, and only three out of 18 workers showed higher values in the operational monitoring. Once again values were within the limits established in

  20. Converting the Caetité Mill Process to Enhance Uranium Recovery and Expand Production

    International Nuclear Information System (INIS)

    The Caetité uranium mill was commissioned in 2000 to produce about 340 t U per year from an uranium ore averaging 0.29% U3O8. This production is sufficient to supply the two operating nuclear power plants in the country. As the Brazilian government has recently confirmed its plan to start building another ones from 2009, the uranium production will have to expand its capacity in the next two years. This paper describes the changes in the milling process that are being evaluated in order to not only increase the production but also the uranium recovery, to fulfil the increasing local demand. The heap leaching process will be changed to conventional tank agitated leaching of ground ore slurry in sulphuric acid medium. Batch and pilot plant essays have shown that the uranium recovery can increase from the 77% historical average to about 93%. As the use of sodium chloride as the stripping agent has presented detrimental effects in the extraction and stripping process, two alternatives are being evaluated for the uranium recovery from the PLS: (a) uranium peroxide precipitation at controlled pH from a PLS that was firstly neutralized and filtered. Batch essays have shown good results with a final calcined precipitate averaging 99% U3O8. Conversely the results obtained at the first pilot plant essay has shown that the precipitation conditions of the continuous process calls for further evaluation. The pilot plant is being improved and another essay will be carried out. (b) uranium extraction with a tertiary amine followed by stripping with concentrated sulphuric acid solution. Efforts are being made to recover the excess sulphuric acid from the pregnant stripping solution to enhance the economic viability of the process and to avoid the formation of a large quantity of gypsum in the pre-neutralization step before the uranium peroxide precipitation. (author)

  1. Aspectos microscópicos do fígado de ratos após administração do óleo de copaíba Microscopic aspects of the rats liver after copaiba oil administration

    OpenAIRE

    Marcus Vinicius Henriques Brito; Ricardo Villar Barbosa de Oliveira; Edvaldo Lima Silveira; José Maciel Caldas dos Reis; Aki Noguchi; Wellington Alves Epaminondas; Melissa Ramos Moraes

    2000-01-01

    A utilização de plantas medicinais é uma prática comumente observada nos países em desenvolvimento. Desta forma objetivou-se verificar os efeitos microscópicos do óleo de copaíba no fígado de ratos. Para tal foram utilizados 50 Rattus norvegicus albinus, machos, distribuídos em cinco grupos: Grupo Copaíba 0,63 (GC0,63 ml/Kg de óleo de copaíba), Grupo copaíba 0,06 (GC0,06 ml/Kg de óleo de copaíba), Grupo Água (GA0,63 ml/kg de água), Grupo milho (GM0,63 ml/Kg de óleo de milho) e grupo Padrão (G...

  2. Aspectos microscópicos do fígado de ratos após administração do óleo de copaíba

    OpenAIRE

    Brito Marcus Vinicius Henriques; Oliveira Ricardo Villar Barbosa de; Silveira Edvaldo Lima; Reis José Maciel Caldas dos; Noguchi Aki; Epaminondas Wellington Alves; Moraes Melissa Ramos

    2000-01-01

    A utilização de plantas medicinais é uma prática comumente observada nos países em desenvolvimento. Desta forma objetivou-se verificar os efeitos microscópicos do óleo de copaíba no fígado de ratos. Para tal foram utilizados 50 Rattus norvegicus albinus, machos, distribuídos em cinco grupos: Grupo Copaíba 0,63 (GC0,63 ml/Kg de óleo de copaíba), Grupo copaíba 0,06 (GC0,06 ml/Kg de óleo de copaíba), Grupo Água (GA0,63 ml/kg de água), Grupo milho (GM0,63 ml/Kg de óleo de milho) e grupo Padrão (G...

  3. Environmental performance evaluation of waste management system of Uranium Concentrated Unit in Caetite city, Bahia State - Brazil

    International Nuclear Information System (INIS)

    The mining/milling activities have the potential to cause risks to the human health and to the environment. In uranium mining, besides inherent damages due to any mining activities there are radiological risks, that may be incurred even in short as in long terms. The large volumes of low activity mining/milling residues produced, are the great challenge in the waste management. Nowadays, the whole Brazilian uranium production come from Uranium Concentrated Unit (URA), a facility operated by Brazilian Nuclear Industry and located at a semi-arid region, in the Caetite city, Bahia state. This Unit is composed by a open pit mine and a milling facility. The present work assess the URA waste management system, the procedures adopted, focused on its environmental performance. It was observed that the waste management system is efficient in the control of the environmental impacts, however improvement chances are detected and a better performance may be reached. Concerning the liquids wastes, it was observed that the storage systems were not projected adequately. The storage capacity was not enough to support a intense rainfall period causing a overflow to the environment. In URA activities there is no radiological risk to the public, but its necessary to improve long term actions, constraints for the post-closure phase, e.g., appropriate institutional controls, restrictions on land use. Finally, it is advisable to introduce a Environmental Management System (EMS) for the whole facility. (author)

  4. Aspectos Morfológicos e Morfométricos do Colo Uterino de Ratas Ooforectomizadas após Aplicação de Óleo de Copaíba

    OpenAIRE

    Brito Nara Macedo Botelho; Kulay-Júnior Luiz; Simões Manuel de Jesus; Lameira Osmar Alves; Lamarão Luciana Garcia; Damous Sérgio Henrique Bastos

    2000-01-01

    Objetivos: verificar o efeito do óleo de copaíba no colo uterino de ratas ooforectomizadas. Métodos: foram utilizadas 120 ratas adultas distribuídas em 4 grupos: as que receberam aplicação de óleo de copaíba, óleo de milho, água e um grupo sem tratamento. Todos os animais foram submetidos a ooforectomia bilateral e posteriormente mantidos em gaiolas por um período de 20 dias antes de iniciar a aplicação das substâncias. Estas foram administradas via vaginal na dose de 0,3 ml, diariamente, uma...

  5. Aspectos microscópicos do fígado de ratos após administração do óleo de copaíba Microscopic aspects of the rats liver after copaiba oil administration

    Directory of Open Access Journals (Sweden)

    Marcus Vinicius Henriques Brito

    2000-06-01

    Full Text Available A utilização de plantas medicinais é uma prática comumente observada nos países em desenvolvimento. Desta forma objetivou-se verificar os efeitos microscópicos do óleo de copaíba no fígado de ratos. Para tal foram utilizados 50 Rattus norvegicus albinus, machos, distribuídos em cinco grupos: Grupo Copaíba 0,63 (GC0,63 ml/Kg de óleo de copaíba, Grupo copaíba 0,06 (GC0,06 ml/Kg de óleo de copaíba, Grupo Água (GA0,63 ml/kg de água, Grupo milho (GM0,63 ml/Kg de óleo de milho e grupo Padrão (GP. As substâncias foram administradas diariamente por 14 dias, quando os animais foram submetidos à eutanásia. Os resultados obtidos demonstraram que microscopicamente, não foram encontradas alterações hepatocelulares, porém, foi verificado congestão vascular nas veias portais e centrolobulares, maior no grupo GC0,63 em relação aos grupos GC0,06, GM, GA e GP (p0,05 o que sugere haver uma relação dose dependente. Os autores concluem que, de acordo com a metodologia empregada, o óleo de copaíba tanto na dose de 0,06 ml/kg como de 0,63 ml/kg foi capaz de promover congestão vascular no fígado de ratos, sugerindo ação dose dependente.The use of medicinal plants is a commonly practice observed at developing countries. Then, this paper aim to verify the effect of the copaiba oil in the liver of rats. Fifty male Wistar rats were used distributed into five groups: Group Copaiba 0.63 (GC0.63 ml/kg of copaiba oil, Group Copaiba 0.06 (GC0.06 ml/kg of copaiba oil, Group Water (GA0.63 ml/kg of water, Group Corn Oil (GM0.63 ml/kg of corn oil and Standard group (GP. The substances were administered daily by 14 days. The animals were submitted to euthanasia in the 14th day, being withdraw the liver and realized histologic study. The results demonstrated that microscopically, in the hepatocity cells no alterations were found; however, vascular congestion was verified in the portal and mid-lobular veins. A larger congestion was observed in the

  6. Experimental study of the uranium mobility due to the weathering action at the uraniferous district of Caetite/Lagoa Real, Bahia, Brazil; Estudo experimental da mobilidade do uranio por acao intemperica, distrito uranifero de Caetite/Lagoa Real, Bahia, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Scislewski, Alexandro Rocha

    2004-01-15

    In the present research, the proposal was to develop a preliminary study about the geochemical behavior of determined chemical elements, mainly the uranium, during the action of weathering processes in the rocks that bear the uranium mineralizations of the Caetite-Lagoa Real region, State of Bahia, more specifically of the Jazida Cachoeira uranium mine. To reach this purpose were used samples that represent several stages of the milling process of the uranium ore, so selecting representatives of the host rock, the ore and the treated ore (waste from the milling plant) to be used in the laboratory-controlled experiments. The samples were dried, sieved and finally introduced in the reactors, these adapted from the Flow-Through Reactor of Brantley and Chen. In the geochemical point of view, the results of the experiments showed a distinct behavior between the samples. It was observed that the treated ore, in relation to the host rocks of the ore and the own ore, shown a faster and homogeneous interaction with the leaching solution; it was also noted that in the output solution of the treated ore samples existed a significant complexation of the uranium by the sulfate (S0{sub 4}{sup -2}), ), instead of the non treated samples (host rock and ore) that were complexed mainly by the carbonate (C0{sub 3}{sup -2}). These different results are attributed to the alterations imposed to the rock during the milling process, and occur mainly, during the acid attack in the leaching process of the milling plant. The results and conclusions of this research, in spite of been preliminary, are essential to understand the behavior of the geochemical speciation of the effluent solutions; to understand the alterations of a rock matrix, and finally, to understand the migration chemical behavior of the related chemical elements. It is expected that these results contribute, in the future, to a deeper knowledge of the processes that control the chemical composition of the natural waters from

  7. Aspectos Morfológicos e Morfométricos do Colo Uterino de Ratas Ooforectomizadas após Aplicação de Óleo de Copaíba Morphological and Morphometric Aspects of the Uterine Cervix in Oophorectomized Rats after Copaíba Oil Application

    Directory of Open Access Journals (Sweden)

    Nara Macedo Botelho Brito

    2000-09-01

    Full Text Available Objetivos: verificar o efeito do óleo de copaíba no colo uterino de ratas ooforectomizadas. Métodos: foram utilizadas 120 ratas adultas distribuídas em 4 grupos: as que receberam aplicação de óleo de copaíba, óleo de milho, água e um grupo sem tratamento. Todos os animais foram submetidos a ooforectomia bilateral e posteriormente mantidos em gaiolas por um período de 20 dias antes de iniciar a aplicação das substâncias. Estas foram administradas via vaginal na dose de 0,3 ml, diariamente, uma vez ao dia até os dias determinados para o sacrifício (7º, 14º e 21º, sendo sacrificados de cada grupo 5 animais por dia. Resultados: todos os animais do grupo copaíba apresentaram epitélio exuberante, estratificado pavimentoso queratinizado, em torno de 10 fileiras de células epiteliais, e lâmina própria com tecido conjuntivo denso, rico em fibroblastos, fibras colágenas, inúmeros vasos sanguíneos e alguns leucócitos. Conclusões: o óleo de copaíba utilizado neste modelo experimental promoveu espessamento do epitélio do colo uterino, que se apresentava pavimentoso estratificado com queratinização, além do espessamento progressivo deste epitélio no decorrer dos dias de estudo.Purpose: to study the effect of copaíba oil on the uterine cervix of oophorectomized rats. Method: 120 female adults were used, divided into four groups: control, water, corn oil and copaíba oil. All animals were submitted to bilateral oophorectomy, and kept in cages for twenty days before applying the substances. These substances were applied by vaginal route at a dose of 0.3 ml, once a day until the predetermined day of sacrifice (7, 14 e 21 days. Results: the animals from the copaíba oil group showed on all days of the study exuberant, keratinous stratified squamous epithelium with about 10 epithelial cell layers and the chorion with conjunctive tissue, fibroblasts, collagen fibers, blood vessels and some leukocytes. Conclusions: The copaíba

  8. Monitoring of Ra-226 and Ra-228 in manioc (Manihot utilissima) and its flour in uranium mining in Caetite - Tropical area in Brazil

    International Nuclear Information System (INIS)

    Full text: Tropical ecosystems have few developments from the radioecology point of view. In Brazil, radioecology studies had their development mainly in the 50's decade, but a little attention has been given to the radionuclides in food. The Uranium Concentrate Unit of 'Caetite' started operation in the 90's decade, and was preceded by the environmental pre-operational monitoring program, carried out during 15 years (1982-1999), according to established licensing procedures, using biological samples from the human and animal food chain. This work shows the results of last ten years of the pre-operational monitoring program of 'Caetite' in manioc (Manihot utilissima) and it's flour. The parameters studied are Ra-226 and Ra-228. Manioc (and it's flour) was chosen because of its role as the most important component of human food chain (82 kg/year for manioc and de same for manioc flour). This study was performed in 44 results of Ra-226 and 44 results of Ra-228 analyses, in 22 samples of manioc and 22 samples of manioc flour. For the analysis, initially, the Anderson-Darling goodness-of-fit test for the maximum likelihood to the gaussian distribution is executed. With the data adjusted to the gaussian curve, an Analysis of variance (ANOVA) test is executed. If there is difference between concentrations, t Student tests are then executed. The data have shown best goodness-of-fit to the log-normal distribution. After proper transformation (y=Ln(x+1)), data have shown best goodness-of-fit to the normal distribution. The ANOVA test applied to normalized data have pointed differences in concentrations, that were identified by t Student tests as the Ra-226 values in manioc and the Ra-228 values in manioc flour. All other values are statistically equal. (author)

  9. Aspectos Morfológicos e Morfométricos do Colo Uterino de Ratas Ooforectomizadas após Aplicação de Óleo de Copaíba Morphological and Morphometric Aspects of the Uterine Cervix in Oophorectomized Rats after Copaíba Oil Application

    OpenAIRE

    Nara Macedo Botelho Brito; Luiz Kulay-Júnior; Manuel Jesus Simões; Osmar Alves Lameira; Luciana Garcia Lamarão; Sérgio Henrique Bastos Damous

    2000-01-01

    Objetivos: verificar o efeito do óleo de copaíba no colo uterino de ratas ooforectomizadas. Métodos: foram utilizadas 120 ratas adultas distribuídas em 4 grupos: as que receberam aplicação de óleo de copaíba, óleo de milho, água e um grupo sem tratamento. Todos os animais foram submetidos a ooforectomia bilateral e posteriormente mantidos em gaiolas por um período de 20 dias antes de iniciar a aplicação das substâncias. Estas foram administradas via vaginal na dose de 0,3 ml, diariamente, uma...

  10. Aspectos produtivos do capim-elefante (Pennisetum purpureum, Schum. cv. Roxo no brejo paraibano Productive aspects of elephant grass (Pennisetum purpureum, Schum. var. Roxo in Paraíba swamp region

    Directory of Open Access Journals (Sweden)

    Estácio Alves dos Santos

    2001-02-01

    Full Text Available O trabalho foi realizado com o objetivo de verificar o efeito de diferentes alturas de corte sobre a produtividade do capim-elefante cv. Roxo em épocas de seca e chuva no Brejo paraibano. O esquema experimental foi um fatorial 4 x 2, sendo quatro alturas de corte (0, 15, 30 e 45 cm, duas épocas (períodos seco e chuvoso e quatro blocos. Foram avaliadas as produções por hectare de massa verde (MV, matéria seca total (MS, de folhas (MSF e colmos (MSC e proteína bruta (PB. Após o corte de uniformização, efetuaram-se dois cortes no período seco em intervalos de 90 dias e três no período chuvoso em intervalos de 60 dias. Não houve interação entre altura de corte e a época. Entretanto, à medida que se elevou a altura do corte, reduziram-se as produções de MV, MS e MSC. As produções de PB e MSF não diferiram. Quando elevadas as alturas dos cortes de 0 para 45 cm, houve redução de aproximadamente 33% na produção para MV, 24,83% para MSF e 60% para MSC. Os cortes no período seco foram mais produtivos em relação aos da época chuvosa. As médias das produções de MS, MV, MSF, MSC e PB foram, respectivamente, 4,12; 21,19; 2,65; 1,47 e 0,32 t/ha no período seco e 12,44; 2,45; 1,81; 0,54 e 0,17 t/ha no período chuvoso.This work was carried to evaluate the effect of different cutting heights on the productivity of elephant grass var. Roxo in dry and rainy season in the Paraíba swamp region. A randomized complete block design in a 4 X 2 factorial, arrangement, with four cutting heights (0, 15, 30 and 45 cm, two periods (dry and rainy seasons and 4 blocks were used. It was evaluated the production/ha of fresh matter (FM, dry matter (DM, leaves (DML, stems (DMS and crude protein (CP. After the uniformity cut, two cuts in dry season with 90 days interval and three cuts in the rainy season with 60 days interval were made. There was no interaction between seasons and cutting heights. However, as cutting height increased, the values

  11. Aerial gamma spectrometry of the uranium province of Lagoa Real (Caetite, BA, Brazil): go environmental aspects and distribution of the absorbed dose in the air

    International Nuclear Information System (INIS)

    In the present study, it was analyzed the surface concentrations of the natural radioelements K, U and Th, as well as the absorbed dose rate in air caused by gamma radiation from the Lagoa Real uranium province, which is located at the center southern portion of Bahia State and comprises an area of approximately 4.600 Km2. Data from the airborne gamma ray spectrometric survey of the region (Sao Timoeo Project) carried out in 1979, was used in this study. Besides, recent data of U, Th and absorbed dose rates from the Environmental Monitoring Program of the uranium concentration plant (URA), operated in the region by the Brazilian Nuclear Industries (INB), were used with the aim of inter compare the sampling points in the same geo referenced area. Imaging geo processing software's give support to frame maps of surface concentrations and ternary maps, as well as allow the integration of these with other themes (e.g. hydrology, geology, pedology) favouring the interpretation of geo environmental process from the radioactive cartography. Considering the whole study area, it was obtained the following mean values: absorbed dose rate in air (61,08 nGy.h-1), Potassium (1,65 % K) , Uranium (3,02 ppm eU) and thorium (18,26 ppm eTh). The geological unities bounding the uranium anomalies were placed in the areas characterized by the highest values of radioelements and, as expected, the major dose levels. The use of ternary maps coupled with the geology and hydrology allowed distinguishing the relationship between the surface distribution of natural radioelements and the geo environmental aspects, including the influence of the catchment in their transport and migration. (author)

  12. The quality of life of older people from the influence of religiosity and spirituality: care for the institutionalized elderly in Caetité (BA

    Directory of Open Access Journals (Sweden)

    Rosemeire Moreira de Oliveira

    2015-02-01

    Full Text Available This article illustrates how elderly caretakers from a Long-Term Care Institution (LTCI perform the care of the body, mind and spirit, and how it affects the life quality of the elderly. Emphasizes the importance of a better preparation for the caretakers to deal and supply the needs of these elderly, in order to provide cares involving the body, mind and the spirit. Uses observational research, with a cross-sectional, descriptive and quantitative qualitative approach.  

  13. Geochemistry and isotope evolution of groundwater flow and recharge from the uranium production center in Brazilian semi-arid region (Caetite-BA, Brazil) - Towards sustainability or shortage?

    International Nuclear Information System (INIS)

    The semi-arid region of the Northeast of Brazil is characterized by a lack of superficial waters due to the low pluviometric precipitation and high evaporation rates. Owing to these adverse climatic conditions, intense pressure is being put on the use of groundwater resources. However, there is still insufficient knowledge of the basic aquifers characteristics leading to an over exploitation of the water resources. The prevailance of crystalline rocks is connected to a fracture aquifer type of low productivity, where wells show, generally, yield rates lower than 3 m3·h-1. This work was developed in a semi-arid area located in the center-south region of Bahia State at 900 metres a.s.l., where were discovered several radioactive anomalies by aerogeophysical surveys performed during 70's decade, that allowed to set the uranium province named Lagoa Real. There were performed isotopic and geochemical analysis of groundwater sampled from twenty-five wells placed in crystalline rocks areas (granite or gneiss) covered by short layers of residual soil or alluvial sediments. The samples were analysed in a mass spectrometer for stable isotopic ratios, like δ2H, δ18O, δ13C (per mille VSMOW) and also measured for radiocarbon activity concentration (14C) to calculate the percentage of modern carbon (PMC) by AMS. The values of δ2H and δ18O defined a local evaporation line (LEL) with slope equal to 4.6 against the value of 7.4 for the Local Meteoric Water Line (Salvador station from 1972 to 1976). The radiocarbon ages, corrected by carbonate dissolution (through δ13C and DIC), showed very young waters that were recently recharged, perhaps during the last few years to several months. The supposed old ages for the fractured aquifer are not accomplished by radiocarbon dating, showing it is unconfined with no discharge of old groundwater through deep faults and short residence time. Thus, the groundwater offer for multiple uses (in terms of quantity) seems to be assured if the future demand does not increase too much. (author)

  14. Aspectos clínicos, epidemiológicos e patológicos da infecção natural em bovinos por Trypanosoma vivax na Paraíba Clinical, epidemiological and pathological signs of natural infection in cattle by Trypanosoma vivax in Paraíba, Brazil

    OpenAIRE

    Batista, Jael S; Francisco Silvestre B. Bezerra; Rodrigo A. Lira; José Ricardo G. Carvalho; Antonio M. Rosado Neto; Alinson A. Petri; Marta Maria G. Teixeira

    2008-01-01

    Descrevem-se dois surtos de tripanossomíase por Trypanosoma vivax em bovinos, ocorridos em dois estabelecimentos do alto sertão da Paraíba. Os sinais clínicos, a patologia e a epidemiologia da doença foram estudados no período de maio de 2005 a novembro de 2006.T. vivax foi identificado em esfregaços da capa leucocitária e mediante a reação em cadeia da polimerase (PCR). Os animais afetados apresentaram anorexia, depressão, febre, anemia, perda de peso, redução da produção leiteira, cegueira ...

  15. Aspectos clínicos, epidemiológicos e patológicos da infecção natural em bovinos por Trypanosoma vivax na Paraíba Clinical, epidemiological and pathological signs of natural infection in cattle by Trypanosoma vivax in Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Jael S. Batista

    2008-01-01

    Full Text Available Descrevem-se dois surtos de tripanossomíase por Trypanosoma vivax em bovinos, ocorridos em dois estabelecimentos do alto sertão da Paraíba. Os sinais clínicos, a patologia e a epidemiologia da doença foram estudados no período de maio de 2005 a novembro de 2006.T. vivax foi identificado em esfregaços da capa leucocitária e mediante a reação em cadeia da polimerase (PCR. Os animais afetados apresentaram anorexia, depressão, febre, anemia, perda de peso, redução da produção leiteira, cegueira transitória, aborto e sinais nervosos caracterizados por incoordenação motora, salivação, opistótono, nistagno, tetania e bruxismo. Todos os animais que apresentaram sintomatologia nervosa morreram. As alterações macroscópicas observadas em um bovino submetido à necropsia foram aumento de volume dos linfonodos, atrofia serosa dos depósitos de gordura, aumento de volume do baço com evidência da polpa branca, hidropericárdio, além de petéquias e equimoses no epicárdio. Histologicamente havia meningoencefalite. O controle da doença na propriedade com tratamento específico dos casos clínicos com aceturato de diminazene foi eficiente, pois após o tratamento não se verificou mais a presença do parasita em esfregaços sanguíneos nem evidência clínica da enfermidade em até 2 meses após o início do surto. Os fatores epidemiológicos favoráveis à ocorrência dos surtos foram a abundância de vetores mecânicos, como tabanídeos e Stomozys spp., e a entrada, no rebanho, de animais oriundos de propriedades onde ocorreu a doença em questão. Sugere-se que o semi-árido do Nordeste, devido a períodos prolongados de secas e altas temperaturas, é região de instabilidade enzoótica para a tripanossomíase, em conseqüência, provavelmente, ao ambiente desfavorável para o desenvolvimento de vetores durante a maior parte do ano.Two outbreaks of trypanosomiasis by Trypanosoma vivax, reported in cattle, occurred on two farms

  16. Primeiros dados quali-quantitativos do mexilhão-dourado, Limnoperna fortunei (Dunker), no Delta do Jacuí, no Lago Guaíba e na Laguna dos Patos, Rio Grande do Sul, Brasil e alguns aspectos de sua invasão no novo ambiente Quali-quantitative first data of golden mussel, Limnoperna fortunei (Dunker), in Jacuí Delta, Guaíba Lake and Patos Lagoon and some invasion aspects

    OpenAIRE

    Maria Cristina Dreher Mansur; Cíntia Pinheiro dos Santos; Gustavo Darrigran; Ingrid Heydrich; Claudia T. Callil; Felipe Rossoni Cardoso

    2003-01-01

    At the end of 1998 and the beginning of 1999, the golden mussel Limnoperna fortunei (Dunker, 1857), Mytilidae, originating from Southeast Asia, was registered for the first time in the Guaíba Lake Basin, Rio Grande do Sul State, Brazil. Quantitative samples were taken since the first register and for two years at various localities in the Jacuí Delta, northern limit of Guaíba Lake, and in the south limit of the later where it empties into Patos Lagoon. Samplings in Patos Lagoon revealed the p...

  17. Experimental study of the uranium mobility due to the weathering action at the uraniferous district of Caetite/Lagoa Real, Bahia, Brazil

    International Nuclear Information System (INIS)

    In the present research, the proposal was to develop a preliminary study about the geochemical behavior of determined chemical elements, mainly the uranium, during the action of weathering processes in the rocks that bear the uranium mineralizations of the Caetite-Lagoa Real region, State of Bahia, more specifically of the Jazida Cachoeira uranium mine. To reach this purpose were used samples that represent several stages of the milling process of the uranium ore, so selecting representatives of the host rock, the ore and the treated ore (waste from the milling plant) to be used in the laboratory-controlled experiments. The samples were dried, sieved and finally introduced in the reactors, these adapted from the Flow-Through Reactor of Brantley and Chen. In the geochemical point of view, the results of the experiments showed a distinct behavior between the samples. It was observed that the treated ore, in relation to the host rocks of the ore and the own ore, shown a faster and homogeneous interaction with the leaching solution; it was also noted that in the output solution of the treated ore samples existed a significant complexation of the uranium by the sulfate (S04-2), ), instead of the non treated samples (host rock and ore) that were complexed mainly by the carbonate (C03-2). These different results are attributed to the alterations imposed to the rock during the milling process, and occur mainly, during the acid attack in the leaching process of the milling plant. The results and conclusions of this research, in spite of been preliminary, are essential to understand the behavior of the geochemical speciation of the effluent solutions; to understand the alterations of a rock matrix, and finally, to understand the migration chemical behavior of the related chemical elements. It is expected that these results contribute, in the future, to a deeper knowledge of the processes that control the chemical composition of the natural waters from this region in the

  18. Aspectos computacionais do ambiente IMAGUS

    OpenAIRE

    Raabe, André Luís Alice; Giraffa, Lúcia Maria Martins

    2000-01-01

    Este artigo apresenta a descrição do ambiente IMAGUS enfatizando aspectos da implementação do protótipo do ambiente. O IMAGUS permite a construção de materiais com fins pedagógicos que se utilizam de vídeos acessado via Internet. O protótipo foi desenvolvido para validar a arquitetura proposta para o ambiente. São apresentadas as soluções a nível de modelagem e a implementação do protótipo baseada na utilização da interface Java Media Framework

  19. Primeiros dados quali-quantitativos do mexilhão-dourado, Limnoperna fortunei (Dunker), no Delta do Jacuí, no Lago Guaíba e na Laguna dos Patos, Rio Grande do Sul, Brasil e alguns aspectos de sua invasão no novo ambiente

    OpenAIRE

    Mansur Maria Cristina Dreher; Santos Cíntia Pinheiro dos; Darrigran Gustavo; Heydrich Ingrid; Callil Claudia T.; Cardoso Felipe Rossoni

    2003-01-01

    At the end of 1998 and the beginning of 1999, the golden mussel Limnoperna fortunei (Dunker, 1857), Mytilidae, originating from Southeast Asia, was registered for the first time in the Guaíba Lake Basin, Rio Grande do Sul State, Brazil. Quantitative samples were taken since the first register and for two years at various localities in the Jacuí Delta, northern limit of Guaíba Lake, and in the south limit of the later where it empties into Patos Lagoon. Samplings in Patos Lagoon revealed the p...

  20. Reuso de Aspectos en AspectJ

    OpenAIRE

    Vanoli, Verónica; Casas, Sandra; Marcos, Claudia; Márquez, Eugenia

    2006-01-01

    La Programación Orientada a Aspectos (POA) permite implementar los requerimientos no funcionales de los sistemas software en unidades separadas denominadas aspectos. Ciertos aspectos son comunes a distintas aplicaciones de software, lo que hace necesario y beneficioso su reusabilidad. Pero no todas las herramientas y/o lenguajes de programación orientados a aspectos están preparados para dar soporte a esta importante característica, como es el caso de AspectJ. En este trabajo se presenta una ...

  1. Máquina de Aspectos: un enfoque alternativo para la implementación de aspectos.

    OpenAIRE

    Gesto, Esteban; Hallar, Karim; Casas, Sandra

    2006-01-01

    La Programación Orientada a Aspectos (POA) es un nuevo paradigma de programación que propone mecanismos para soportar la separación de los aspectos no funcionales de los sistemas software. Una herramienta POA consiste en tres componentes principales: un lenguaje de programación base, un lenguaje de programación orientado a aspectos y un tejedor de aspectos (weaver). El presente trabajo propone un enfoque alternativo para la implementación de aspectos basado en la especificación de los mism...

  2. Aspectos moleculares da anemia falciforme

    OpenAIRE

    Galiza Neto Gentil Claudino de; Pitombeira Maria da Silva

    2003-01-01

    No presente artigo abordaram-se vários aspectos relacionados à natureza molecular da anemia falciforme, desordem hematológica de caráter hereditário que acomete expressivo número de indivíduos em várias regiões do mundo. As pesquisas realizadas em torno desta patologia da hemácia, ao longo de quase um século, a partir de 1910, cooperaram para a criação de um novo e importante segmento da ciência, denominado biologia molecular. A descoberta dos polimorfismos da mutação (GAT->GTG) no gene que c...

  3. Accidents caused by Bothrops and Bothropoides in the State of Paraiba: epidemiological and clinical aspects Acidentes causados por serpentes dos gêneros Bothrops e Bothropoides no Estado da Paraíba: aspectos clínicos e epidemiológicos

    OpenAIRE

    Fagner Neves Oliveira; Monalisa Taveira Brito; Isabel Cristina Oliveira de Morais; Sayonara Maria Lia Fook; Helder Neves de Albuquerque

    2010-01-01

    INTRODUCTION: Bothrops and Bothropoides snakes cause 70% of the ophidic accidents in Brazil. The species that cause ophidic accidents in State of Paraíba are Bothropoides erythromelas, Bothrops leucurus and Bothropoides neuwiedi. METHODS: This is a prospective and transverse study, following a quantitative approach of accidents involving Bothrops and Bothropoides admitted to the Toxicological Assistance and Information Centers of Campina Grande and João Pessoa (Ceatox-CG and Ceatox-JP), aimed...

  4. Aspectos moleculares da anemia falciforme

    Directory of Open Access Journals (Sweden)

    Galiza Neto Gentil Claudino de

    2003-01-01

    Full Text Available No presente artigo abordaram-se vários aspectos relacionados à natureza molecular da anemia falciforme, desordem hematológica de caráter hereditário que acomete expressivo número de indivíduos em várias regiões do mundo. As pesquisas realizadas em torno desta patologia da hemácia, ao longo de quase um século, a partir de 1910, cooperaram para a criação de um novo e importante segmento da ciência, denominado biologia molecular. A descoberta dos polimorfismos da mutação (GAT->GTG no gene que codifica a cadeia beta da hemoglobina, originando diferentes haplótipos da doença, permitiu um melhor e mais amplo conhecimento em torno da heterogeneidade clínica nos pacientes falcêmicos. Analisando a hemoglobina na sua estrutura normal e mutante, sua produção e evolução, pode-se ter um entendimento mais completo da fisiopatologia desta doença e da sua complexidade clínica.

  5. Accidents caused by Bothrops and Bothropoides in the State of Paraiba: epidemiological and clinical aspects Acidentes causados por serpentes dos gêneros Bothrops e Bothropoides no Estado da Paraíba: aspectos clínicos e epidemiológicos

    Directory of Open Access Journals (Sweden)

    Fagner Neves Oliveira

    2010-12-01

    Full Text Available INTRODUCTION: Bothrops and Bothropoides snakes cause 70% of the ophidic accidents in Brazil. The species that cause ophidic accidents in State of Paraíba are Bothropoides erythromelas, Bothrops leucurus and Bothropoides neuwiedi. METHODS: This is a prospective and transverse study, following a quantitative approach of accidents involving Bothrops and Bothropoides admitted to the Toxicological Assistance and Information Centers of Campina Grande and João Pessoa (Ceatox-CG and Ceatox-JP, aimed at identifying the epidemiological and clinical profile of such accidents. All of the patients admitted had medical diagnoses and were monitored at Ceatox-CG or Ceatox-JP. RESULTS: The genera Bothrops and Bothropoides caused 91.7% of the ophidic accidents reported. Snake bites were frequent in men (75.1%, rural workers (65.1%, literate individuals (69% between 11 and 20 years-old (21.7%, and toes the most common area attacked (52.7%. Most (86.6% patients were admitted within 6 hours after the accident/bite, with a predominance of mild cases (64.6%. The annual occurrence in Paraíba was 5.5 accidents/100,000 inhabitants and lethality was 0.2%. CONCLUSIONS: Positive changes in the profiles of these accidents were verified, such as the non-application of inadequate solutions, including the use of tourniquet, coffee grounds, garlic, suction and/or cutting the bitten area. Moreover, the Itinerant Laboratory project, linked to Paraíba State University in partnership with Ceatox-CG, has contributed positively, providing several cities of the state with information regarding the prevention of accidents involving venomous animals. The local press has also contributed, reporting the educational work developed by the centers.INTRODUÇÃO: As serpentes Bothrops e Bothropoides são responsáveis por 70% dos acidentes ofídicos ocorridos no Brasil. As espécies causadoras de acidentes na Paraíba são Bothropoides erythromelas, Bothrops leucurus e Bothropoides neuwiedi

  6. Aspectos morfológicos e hemodinâmicos do baço em indivíduos normais: estudo por ultra-som Doppler Morphological and hemodynamic features of the spleen in normal subjects: a Doppler ultrasound study

    Directory of Open Access Journals (Sweden)

    Denise Said Jannini

    2003-08-01

    Full Text Available ANTECEDENTES: A diversidade de técnicas de mensuração esplênica pelo ultra-som Doppler (US Doppler, a falta de valores biométricos e dopplervelocimétricos dificultam a avaliação deste órgão e de suas características hemodinâmicas. OBJETIVO: Estabelecer padrões biométricos e hemodinâmicos por US-Doppler em indivíduos adultos sadios. MATERIAIS E MÉTODOS: Estudo prospectivo de 44 indivíduos sadios, sendo 19 do sexo masculino e 25 do sexo feminino, na faixa etária de 23 a 60 anos (37,4 ± 9,6. Morfometria (US modo-B: baço: eixos longitudinal (L, transversal (T e ântero-posterior (AP; diâmetro da artéria esplênica (DAE e diâmetro da veia esplênica (DVE. Índices morfométricos do baço: uniplanar (IBU, biplanar (IBB e volume esplênico (VE. Dopplervelocimetria (US Doppler: a artéria esplênica: velocidade de pico sistólico (VPS, média das velocidades máximas de fluxo (TAMax; índices de impedância vascular: índice de resistividade (IR; índice de pulsatilidade (IP; b veia esplênica: média das velocidades máximas de fluxo (TAMax. RESULTADOS: Morfometria: L = 9,3 ± 1,3 cm; T= 3,9 ± 0,7 cm; AP = 8,4 ± 1,2 cm; DAE = 0,3 ± 0,07 cm; DVE: 0,5 ± 0,12 cm. Índices morfométricos do baço: IBU = 33,5 ± 9,9; IBB = 36,7 ± 10,3; VE = 164,3 ± 62,9 cm³. Dopplervelocimetria: a artéria esplênica: VPS = 59,8 ± 23,6 cm/s; TAMax = 40,2 ± 15,9 cm/s; IP = 0,86 ± 0,30; IR = 0,55 ± 0,09; b veia esplênica: TAMax = 16,8 ± 8,3 cm/s. CONCLUSÃO: Relato de valores biométricos e dopplervelocimétricos do baço em indivíduos sadios.BACKGROUND: The diversity of existing techniques for the measurement of the spleen using Doppler ultrasound (Doppler-US as well as the lack of biometrical and Doppler velocimetry reference values make the evaluation of this organ and its hemodynamics quite difficult. OBJECTIVES: To establish biometrical and hemodynamics Doppler-US standard values for healthy adult individuals. MATERIALS AND METHODS

  7. Geochemistry and isotope evolution of groundwater and recharge mechanisms at a uranium production centre in the semi-arid region of Caetite-BA, Brazil: Implications for groundwater management

    International Nuclear Information System (INIS)

    The semi-arid region of the northeast of Brazil is characterized by a lack of superficial waters due to low precipitation and high evaporation rates. Due to these adverse climatic conditions, intense pressure is being put on the use of groundwater resources. However, there is still insufficient knowledge about the aquifer system which is causing an overexploitation of the water resources. Groundwater is pumped from a fractured, crystalline aquifer of low productivity, where wells show generally yield rates lower than 3 m3 · h-1. The study was carried out in a semi-arid area located in the centre-south region of Bahia State at an elevation of 900 m a.s.L, where were discovered several radioactive anomalies by aerogeophysical surveys performed during the 1970s, that give origin to the uranium province named Lagoa Real.The research approach included isotopic and geochemical analysis of groundwater sampled from 25 wells placed in crystalline rock areas (granite or gneiss) covered by thin layers of residual soil or alluvial sediments. Groundwater is Na-HCO3 type water and relative high concentrations of Cl and SO4- are observed in some groundwater.The stable isotope data (δH and δ18O) showed that evaporation plays a role in the salinization of groundwater.The radiocarbon ages, corrected by carbonate dissolution (through δ13C and DIC), showed very young waters that were recently recharged, perhaps during the last few decades These data discard the possibility that groundwater salinization was caused by discharge of deeper saline groundwater through faults associated to a regional groundwater flow system. The presence of an active shallow groundwater flow system offers better possibility for sustainable use of the groundwater resources in this semi-arid region of Brazil. (author)

  8. Aspectos biopsicosociales asociados al embarazo adolescente

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    Regina Cogollo Jiménez

    2012-12-01

    Full Text Available Introducción: El embarazo en la adolescencia, es un evento inesperado, sorpresivo. Este artículo establece la importancia de identificar los aspectos biopsicosociales asociados al embarazo adolescente en las embarazadas asistentes al programa de Control Prenatal de una Empresa Social del Estado de nivel 1 en Montería en 2009, para comprender las actitudes y los comportamientos asociados a esta etapa tan temprana. Materiales y Métodos: Es un estudio descriptivo, cuantitativo, de corte transversal. Población y muestra: 30 adolescentes embarazadas asistentes al Programa, el muestreo por conveniencia. Se utilizó la encuesta y la observación directa, previa autorización del Director de la empresa. Resultados: Caracterización de la población: predominó la edad de 15 a 19 años (adolescencia tardía, uniones libres, baja escolaridad debido a la deserción escolar, ingreso económico menor al salario mínimo legal vigente. Aspectos Biológicos: la menarquía a temprana edad (9 a 14 años, y en ella la mitad de los embarazos. La mayoría de los segundos embarazos terminaron en parto, la minoría en cesárea y aborto. La captación para los controles prenatales fue tardía, algunas no cumplieron con las citas programadas. Aspectos Psicológicos: inestabilidad con la pareja al enterarse del embarazo, tuvieron soporte familiar moral y económico, abandonaron sus estudios y presentaron malestares como estrés, depresión y tristeza. Aspectos Sociales: predominó la convivencia con la familia extensa. Hubo aceptación en el colegio y en los amigos. Discusión y Conclusiones: Se plantean estrategias para disminuir estos aspectos: elaboración de una cartilla sobre “Cuidado de la adolescente embarazada”, creación de espacios de reflexión, jornadas lúdicas educativas, entre otros. (Rev Cuid 2012; 3(3:385-93.Palabras clave: Embarazo en Adolescencia, Bienestar Materno, Atención Prenatal. (Fuente: De

  9. Aspectos biopsicosociales asociados al embarazo adolescente

    OpenAIRE

    Regina Cogollo Jiménez

    2012-01-01

    Introducción: El embarazo en la adolescencia, es un evento inesperado, sorpresivo. Este artículo establece la importancia de identificar los aspectos biopsicosociales asociados al embarazo adolescente en las embarazadas asistentes al programa de Control Prenatal de una Empresa Social del Estado de nivel 1 en Montería en 2009, para comprender las actitudes y los comportamientos asociados a esta etapa tan temprana. Materiales y Métodos: Es un estudio descriptivo, cuantitativo, de corte transver...

  10. Aspectos Neuropsiquiátricos do Cerebelo

    OpenAIRE

    Salomé Xavier; Berta Ferreira

    2013-01-01

    As funções neurológicas do cerebelo na regulação do equilíbrio e do movimento são conhecidas desde há longa data. No entanto, nas últimas décadas, a partir dos estudos seminais de Schmahmann, tem sido progressivamente reconhecida a sua participação em processos cognitivos e emocionais e no comportamento. As autoras pretendem rever de forma sumária os principais aspectos da fisiologia “clássica” do cerebelo. Serão depois revistas mais detalhadamente as funções neuropsiquiátricas do cerebelo e ...

  11. Aspectos fundamentales de los sistemas de riego

    OpenAIRE

    Arango Tobón, Julio César

    2002-01-01

    El impreso universitario ASPECTOS FUNDAMENTALES DE LOS SISTEMAS DE RIEGO sirve como documento base en el entendimiento técnico de la aplicación de agua a los cultivos, siendo igualmente un referente para que los técnicos de las Corporaciones Autónomas Regionales lo utilicen para implementar políticas fijadas en la Ley 373/97, "POR LA CUAL SE ESTABLECE EL PROGRAMA PARA EL USO EFICIENTE Y AHORRO DEL AGUA", buscando con ello una mejora en la utilización de uso de los recursos de agua y suelo, te...

  12. Aspectos neurológicos da Pelagra

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    Aluízio Marques

    1944-12-01

    Full Text Available São estudadas as várias questões gerais da Pelagra, nomeadamente os aspectos clínicos e etiopatogênicos. As formas clássicas se traduzem por manifestações intensificadas na época de maior insolação e evidenciadas por desordens da pele, do aparelho digestivo e sistema nervoso. Lembra o autor que, não obstante se deva ter em primeira conta esses aspectos do mal, na prática não se podem descuidar os oligossintomáticos, frustos e larvados. Com referência a tais formas, acredita ser de grande importância salientar os exemplares em que se não encontram sintomas cutâneos e configuram a "Pelagra sine Pelagra". A seguir, procura mostrar a freqüência dos aspectos neurológicos e psiquiátricos da condição e afirma que, se não se descrevem mais amiúde, é porque os médicos que se ocupam da Pelagra, descuidam de esmiuçar a existência de sinais e sintomas nervosos e mentais muito sutis que com freqüência passam despercebidos. Também recorda que os aspectos neurológicos da Pelagra não se encontram mais vezes, porque, via de regra, só se diagnostica a doença quando as lesões cutâneas são evidentes; de hábito deixam-se de lado os exemplares de "Pelagra Sine Pelagra", os de tradução clínica destituída de eritema ou outros fenômenos dermatológicos. Baseado na sua experiência, diz que as manifestações nervosas e mentais da Pelagra são em muito maior número do que é de supor-se. Para documentar essa afirmação, recorda a observação que tem feito em mais de uma oportunidade e os casos publicados pelos autores brasileiros; nem só os registados especialmente do ponto de vista neurológico mas, também, aqueles em que se não deu particular apreço a esse aspecto e em que a simples leitura das observações evidencia fenômenos neuro-psiquiátricos muito caraterísticos. Os quatro exemplares relatados no trabalho, foram colhidos do Serviço de Clínica Neurológica do Hospital Getúlio Vargas. Dois deles

  13. Decay of 120Ba

    International Nuclear Information System (INIS)

    The decay of 120Ba has been studied with an on-line isotope separator. Its half-life was determined to be t1/2=24±2 s. A decay scheme is proposed, based on γ-γ, γ-X, and γ-β+ coincidence measurements, which takes account of all 16 observed γ rays. The total decay energy was measured to be QEC=50±0.3 MeV

  14. Life-limiting mechanisms in Ba-oxide, Ba-dispenser and Ba-Scandate cathodes

    Science.gov (United States)

    Gaertner, G.; Barratt, D.

    2005-09-01

    Ba-oxide, Ba-dispenser and Ba-Scandate cathodes have been continuously improved in their emission performance in the past decades. Ba-oxide and Ba-dispenser cathodes are also the dominant types of thermionic cathodes used in most vacuum tube applications. When improvements in emissive properties are introduced, their impact on cathode life - where several years in a vacuum tube environment are typically required - also needs to be known. Hence, the investigation of cathode life-limiting effects is the basis of accelerated life predictions and of further cathode improvement. In this contribution, the main effects limiting the operating life of Ba/BaO-based thermionic cathodes are discussed, especially related to intrinsic dispensation and resupply to the emissive surface. Emission poisoning induced by adsorption of poisonous gases will not be addressed here. We will stress common points and point out the differences between the three types.

  15. Aspectos fundamentales del método de Edith Stein

    OpenAIRE

    Mariano Crespo

    2010-01-01

    este trabajo aborda tres aspectos fundamentales del método filosófico de Edith Stein. En primer lugar, se alude a las cosas mismas como el punto de partida del filosofar de esta autora. En segundo lugar, se considera el aspecto que constituye uno de los aportes fundamentales del método fenomenológico y que es claramente reconocible en nuestra autora, a saber, el haber puesto de manifiesto la imposibilidad de hacer filosofía primera sin tomar en cuenta la vida consciente ante la que todas las ...

  16. Aspectos legales del comercio electrónico

    OpenAIRE

    Martínez Usero, José Ángel

    2000-01-01

    El comercio electrónico constituye uno de los ámbitos de mayor investigación científica y más actividad en la creación de un marco legislativo. El crecimiento de un mercado electrónico global ha afectado a numerosos aspectos legales, que incluye: seguridad en la red y las transacciones, protección de los derechos de propiedad intelectual y material con copyright en el entorno digital, la gestión de los sistemas de pago, la legalidad de los contratos electrónicos y diferentes aspectos de la ju...

  17. Band-overlap metallization of BaS, BaSe and BaTe

    Science.gov (United States)

    Carlsson, A. E.; Wilkins, J. W.

    1983-01-01

    The insulator-metal transition volumes for BaS, BaSe, and BaTe are calculated for the first time, using the self-consistent augmented spherical wave technique. The metallized transition volumes are smaller than those corresponding to the NaCl yields CsCl structural transitions, but, 10 to 15% larger than those obtained by the Herzfeld dielectric theory. The calculated equilibrium energy gaps in the NaCl structure underestimate the measured ones by 50 to 60%.

  18. Aspectos funcionales de la psicoterapia analítico funcional.

    Directory of Open Access Journals (Sweden)

    Javier Virués Ortega

    2003-01-01

    Full Text Available Se considera una nueva psicoterapia de orientación conductual: la Psicoterapia Analítico Funcional. Se describen brevemente sus fundamentos teóricos, metodológicos y aplicados. Se discuten sus aspectos funcionales desde un punto de vista contextual.

  19. Aspectos psicosociales en el envejecimiento de las mujeres1

    OpenAIRE

    Castaño, Dolores; Martínez Benlloch, Isabel

    1990-01-01

    Este trabajo analiza el envejecimiento femenino y, con más detalle, aquellos aspectos diferenciales como son los peculiares rasgos sociales del rol femenino y su repercusión sobre el envejecimiento, la menopausia y los derivados del papel de ama de casa cuando llega la jubilación.

  20. Aspectos legales de la seguridad informática

    OpenAIRE

    Lomas García, Fernando

    2012-01-01

    El presente trabajo consiste en el estudio de tres casos, que cubren diversos aspectos legales desde el punto de vista de la seguridad informática. Se tienen en cuenta, entre otros: la LOPD, el Código Penal, la Constitución Española...

  1. Aspectos del dengue investigados en Santander

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    Ruth Martínez

    2004-03-01

    Full Text Available

    Entre 1998 y 2003 se registraron en Colombia 256,831 casos de dengue (22,834 de dengue hemorrágico DH de los cuales 41,325 (36% fueron en Santander (3,265 DH (1,2. En este período ocurrieron brotes en 1998 y 2001 observándose incremento de casos severos en el segundo (2. Por otro lado, existen inconvenientes con el diagnóstico que dificultan el manejo clínico oportuno y la vigilancia epidemiológica. Como consecuencia, los siguientes aspectos han sido investigados:

    1 Contribución de la circulación de los serotipos/genotipos al incremento del dengue hemorrágico, considerando que la entrada o emergencia de éstos se han asociado con epidemias (3. Entre 1998 y 2004 se hicieron 1,180 intentos de aislamiento viral en células C6/36 (4, detectándose los 4 serotipos. El DEN-2 se aisló todos los años con mayor frecuencia durante los brotes (43% y 40% de los cepas; el DEN-1 se detectó entre 1998 y 2001, siendo el prevalente en el primer brote (57%, pero el menos en el segundo (4%; el DEN-3 se detectó en el brote del 2001 con similar frecuencia al DEN-2 (36%, por primera vez en Colombia luego de 23 años ausente, y fue el prevalerte entre 2002-2004 (92% de los aislados, aunque en estos años no se reportó incremento del DH (2; el DEN-4 se aisló solo en el 2000 (27% y en el brote del 2001 (20%. El genotipo de cada serotipo se identificó por análisis de RSS-PCR (5,6. Se encontraron el subtipo A (ó III, C (ó I y B (ó II de los serotipos 2, 1 y 4, similares a los que están circulando en países de América y oriundos del Asia. Los DEN-3 fueron del subtipo C (ó III iguales al virus que entró en América en 1994 oriundo de Sri-Lanka, India. Los genotipos del 2 y 3 encontrados en Santander producen con mayor frecuencia DH (3,7.

    Aspectos topográficos y temporales en terapia familiar.

    Directory of Open Access Journals (Sweden)

    Francisco J Vaz Leal

    1986-01-01

    Full Text Available En el presente artículo se presenta un modelo teórico, construido para trabajar en el estudio de la familia; dicho modelo, basado en el concepto de «reglas» familiares, pretende tomar en consideración diversos aspectos territoriales y temporales relacionados con las mismas, para integrarlos en el proceso terapéutico. Se ofrecen diversos ejemplos clínicos para ilustrar cada uno de los puntos abordados

  2. Aspectos topográficos y temporales en terapia familiar.

    OpenAIRE

    Francisco J Vaz Leal; Joaquín Ingelmo Fernández; Beatriz López Vinuesa

    1986-01-01

    En el presente artículo se presenta un modelo teórico, construido para trabajar en el estudio de la familia; dicho modelo, basado en el concepto de «reglas» familiares, pretende tomar en consideración diversos aspectos territoriales y temporales relacionados con las mismas, para integrarlos en el proceso terapéutico. Se ofrecen diversos ejemplos clínicos para ilustrar cada uno de los puntos abordados

  3. Aspectos claves para elaborar un estudio de clima laboral

    OpenAIRE

    Mena Gómez, Luis Alberto

    2014-01-01

    El siguiente trabajo contiene los resultados de un estudio de medición de clima laboral, aplicando cinco dimensiones: Formación, Comunicación Interna, Situación Profesional y Perspectivas de Desarrollo e Imagen corporativa, realizado en una empresa de distribución alimentaria. Los distintos aspectos valorados en la elaboración de una encuesta se han aplicado en la investigación realizada.

  4. Aspectos fundamentales del método de Edith Stein

    Directory of Open Access Journals (Sweden)

    Mariano Crespo

    2010-01-01

    Full Text Available este trabajo aborda tres aspectos fundamentales del método filosófico de Edith Stein. En primer lugar, se alude a las cosas mismas como el punto de partida del filosofar de esta autora. En segundo lugar, se considera el aspecto que constituye uno de los aportes fundamentales del método fenomenológico y que es claramente reconocible en nuestra autora, a saber, el haber puesto de manifiesto la imposibilidad de hacer filosofía primera sin tomar en cuenta la vida consciente ante la que todas las cosas se abren. En tercer lugar, se remite a la individualidad de la persona como un aspecto de la antropología de Stein especialmente relevante. Al final del análisis de cada uno de estos tres aspectos metodológicos se intenta mostrar en qué sentido éstos pueden ser de relevancia para emprender el camino hacia la pregunta por la mujer.This paper addresses three fundamental aspects of Edith Stein's philosophical method. Firstly, it looks at issues such as the author's starting point of philosophizing. Secondly, it considers the aspect, which constitutes one of the fundamental contributions of the phenomenological method and is clearly recognizable in our author, such as having highlighted that it is impossible to carry out first philosophy without taking into account conscious life, before which all things are opened. Thirdly it looks at the individuality of the person as an especially relevant aspect of Stein's anthropology After analyzing each of these methodological aspects, this paper attempts to show how they may be relevant in laying out the path towards the question of the woman.

  5. The decay of 120Ba

    International Nuclear Information System (INIS)

    120Ba was produced by bombarding a 2 mg/cm2 thick 106Cd target with a 68 MeV 16O beam and fluorated in a helium-jet ion source. The decay of on-line mass separated activity 120Ba has been studied by γ-X, γ-γ and γ-β coincidence measurements. Its half-life was measured to be 24 ± 2s. The total decay energy was extracted to be QEG 5.0 ± 0.3 MeV. A simple decay scheme has been proposed

  6. TRANSITIVITY AND THE BA CONSTRUCTION

    Directory of Open Access Journals (Sweden)

    Pei-Jung Kuo

    2010-06-01

    Full Text Available In this paper, I discuss the legitimacy of positing a Transitivity Projection (= TrP cf. Bowers 1993, 1997, 2001 and 2002 in the BA construction in Mandarin Chinese. BA has been proposed to be a semantically-bleached verb, inserted in the v position (Huang 1997 and Lin 2001. Several pieces of evidence such as manner adverbial placement (cf. Huang, Li and Li 2009 and GEI-insertion (cf. Tang 2001 indicate that there must be a functional projection between the vP and VP to host the BA NP. I propose that a TrP is probably the most apt candidate for the XP. I also argue, in contrast to the proposal by Huang, Li and Li (2009, that the present proposal which employs a TrP captures most of the properties of the BA construction. A comparison with the structure of the BEI construction also shows that the TrP proposal fits into the general picture of current linguistic theory on transitive constructions without extra stipulations.

  7. Phase formation in the BaB2O4-BaF2 system

    Science.gov (United States)

    Bekker, T. B.; Fedorov, P. P.; Kokh, A. E.

    2012-07-01

    It is shown that the BaB2O4-BaF2 system is quasi-binary with the following eutectics coordinates: 760°C, 59 mol % BaF2, 41 mol % BaB2O4. Due to the intense pyrohydrolysis during the growth of β-BaB2O4 crystals from the 55.6 mol % BaB2O4-44.4 mol % BaF2 composition, the Ba5B4O11 compound is formed in the system. This process leads to the cocrystallization of the β-BaB2O4 and Ba5B4O11 phases and impedes the formation of high-quality crystals.

  8. Cultura, lenguaje y cognición: algunos aspectos

    OpenAIRE

    Martínez de Oliveira, Daniel

    2012-01-01

    El artículo trata de algunos aspectos generales sobre cultura y cognición, con especial interés en la cuestión del lenguaje, partiendo de estudios de antropología social y cultural, psicología, lingüística, neurociencia y paleoantropología. Se discute rápidamente el tema de la evolución, relacionándola al desarrollo cognitivo humano, y algunas implicaciones políticas sobre lenguaje, cultura y cognición en el mundo moderno. The article deals with some general aspects of culture ...

  9. Algunos aspectos de la vida cotidiana en la comedia griega

    OpenAIRE

    García Soler, María José

    2011-01-01

    La comedia es uno de los géneros literarios que mejor refleja la vida diaria, donde encuentra numerosos elementos que le sirven de recurso para provocar la risa. El presente artículo se centra en cómo muestran los autores cómicos algunos aspectos de la vida pública (el funcionamiento de la asamblea popular y el sistema judicial) y de la vida privada (la alimentación y la gastronomía) de la Atenas de los siglos V y IV a.C.

  10. Ensayos con animales: aspectos éticos y legales

    OpenAIRE

    Rubio Álvarez, Lucía

    2015-01-01

    El Objetivo principal del trabajo Ensayos con animales: Aspectos éticos y legales es proponer medidas que permitan disminuir el uso de animales de experimentación. Para ello se han desarrollado otros objetivos secundarios encaminados a facilitar la tarea de los investigadores: Recopilar la normativa ética y legal, facilitar el acceso a la terminología, esquematizar el protocolo de investigación establecido en la normativa, verificar la existencia de bases de datos de las investigaciones, estu...

  11. Aspectos éticos de la crisis financiera

    OpenAIRE

    Montuschi, Luisa

    2009-01-01

    Se analizan aspectos de la crisis financiera para identificar cuales fueron las principales causas que la llevaron a los límites conocidos. Es cierto que el problema encontró sus raices en el mercado de hipotecas subprime y en la falta de responsabilidad de las principales instituciones financieras. Pobres políticas económicas crearon el contexto adecuado para que la crisis tuviera los alcances que se conocen. Pero no puede dejar de considerarse el factor humano. En particular, debe tenerse e...

  12. Varizes ganglionares: fisiopatologia e aspectos ecográficos

    OpenAIRE

    Rosado, E; Cabral, P; Pinto, E.; Penha, D; Paixão, P; Germano, A

    2012-01-01

    INTRODUÇÃO: As veias gânglionares presentes no triângulo femoral constituem uma rede venosa subcutânea que liga vários pontos do sistema venoso superficial e profundo. A dilatação desta rede venosa pode ser causa de insuficiência do sistema venoso superficial ou, mais frequentemente, estar envolvida no processo de recorrência varicosa pós-safenectomia. OBJECTIVOS: Descrever os aspectos anatómicos e fisiológicos da rede venosa ganglionar do triângulo femoral, alertando para uma causa pouco...

  13. Aspectos financieros de las cesiones de carteras de siniestros

    Directory of Open Access Journals (Sweden)

    Rivas López, María Victoria

    2003-01-01

    Full Text Available Se analizan los aspectos financieros y económicos de las compañías de seguros a través de las cesiones de carteras de siniestros. Esta técnica da cobertura a ciertos riesgos financieros, permitiendo la optimización de riesgo soportado por la cedente, con el fin de diluir los efectos adversos del comportamiento de la variable aleatoria de la siniestralidad, para la mejora de la solvencia, el incremento de la capacidad de suscripción y salvaguardar el balance.

  14. Tres aspectos y una estrategia en el edifi cio SEIDA

    OpenAIRE

    Ravetllat Mira, Pere Joan

    2015-01-01

    A principios de los 60, la empresa automovilística SEIDA encarga al arquitecto Francesc Mitjans la reordenación de una manzana de Barcelona situada en la confl uencia de General Mitre con Avenida de Sarrià. Dicha reordenación tenía que acoger sus talleres de reparación, el almacén de vehículos, una gasolinera y además un edifi cio residencial de considerables dimensiones. A partir de dicho edifi cio, me gustaría refl exionar en este texto sobre tres aspectos especialmente desta...

  15. Aspectos neuropsicológicos de la música

    OpenAIRE

    Pérez López, Guillermo Rubén

    2014-01-01

    [ES] Desde hace aproximadamente dos décadas el estudio de los aspectos neuropsicológicos relacionados con la música ha venido cobrando gran importancia en el ámbito de la Neurociencia. La música constituye un estímulo multimodal que transmite información visual, auditiva y motora a nuestro cerebro, que a su vez, como el lenguaje, cuenta con una red neural específica para su procesamiento. De este modo, la percepción y producción musical implican una gran parte de nuestras capac...

  16. Clasificación y resolución de conflictos entre aspectos

    OpenAIRE

    Casas, Sandra; Reinaga, Héctor; Vanoli, Verónica; Sierpe, Luis; Saldivia, Claudio; Pryor, Jane

    2005-01-01

    En este trabajo se introduce la problemática de conflictos entre aspectos circunscripta al paradigma de programación orientada a aspectos. En base a una taxonomía para la resolución de conflictos se analizan brevemente algunas lenguajes orientados a aspectos. El análisis nos permite establecer algunos requisitos para diseñar e implementar herramientas mas abarcativas y seguras para el desarrollo de aplicaciones bajo este enfoque, en lo que respecta al manejo de conflictos entre aspectos.

  17. Hemangiomas cavernosos do cranio: aspectos clinicos, radiologicos e terapeuticos

    Directory of Open Access Journals (Sweden)

    D. Kirchhoff

    1977-12-01

    Full Text Available São discutidos os aspectos relativos ao diagnóstico e tratamento dos hemangiomas cavernosos do crânio. Os dados obtidos em 26 casos, são apresentados, sendo salientado que a localização dos hemangiomas foi maior na região frontal, sendo mais atingido o sexo masculino. Os outros aspectos são coincidentes com os demais autores. A problemática desses tumores, principalmente a sua demonstração radiológica e o seu tratamento, são ressaltados, chegando-se à conclusão final de que o melhor meio de demonstração radiológica é a punção para contrastação direta do tumor. O tratamento de escolha é o cirúrgico, sendo a extirpação em bloco preferida nos casos de comprometimento ósseo importante, sendo a intervenção direta com dissecção e excisão reservada para as localizações nos tecidos moles ou com mínima participação óssea.

  18. Critically evaluated atomic transition probabilities for Ba I and Ba II

    International Nuclear Information System (INIS)

    Atomic transition probabilities for allowed and forbidden lines of Ba I and Ba II are tabulated, based on a critical evaluation of recent literature sources. The data are presented in multiplet format and are ordered by increasing excitation energies. (author)

  19. Ba{sub 2}phenanthrene is the main component in the Ba-doped phenanthrene superconductor

    Energy Technology Data Exchange (ETDEWEB)

    Yan, Xun-Wang [Beijing Computational Science Research Center, Beijing 100084 (China); Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062 (China); State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100190 (China); School of physics and electrical engineering, Anyang Normal University, Henan 455000 (China); Huang, Zhongbing, E-mail: huangzb@hubu.edu.cn [Beijing Computational Science Research Center, Beijing 100084 (China); Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062 (China); Lin, Hai-Qing [Beijing Computational Science Research Center, Beijing 100084 (China)

    2014-12-14

    We have systematically investigated the crystal structure of Ba-doped phenanthrene with various Ba doping levels by the first-principles calculations combined with the X-ray diffraction (XRD) spectra simulations. Although the experimental stoichiometry ratio of Ba atom and phenanthrene molecule is 1.5:1, the simulated XRD spectra, space group symmetry and optimized lattice parameters of Ba{sub 1.5}phenanthrene are not consistent with the experimental ones, while the results for Ba{sub 2}phenanthrene are in good agreement with the measurements. The strength difference of a few XRD peaks can be explained by the existence of pristine phenanthrene. Our findings suggest that instead of uniform Ba{sub 1.5}phenanthrene, there coexist Ba{sub 2}phenanthrene and undoped phenanthrene in the superconducting sample. The electronic calculations indicate that Ba{sub 2}phenanthrene is a semiconductor with a small energy gap less than 0.05 eV.

  1. AMiBA, XMM, and Cluster Surveys

    CERN Document Server

    Liang, H

    2001-01-01

    The Array for Microwave Background Anisotropy (AMiBA) is an interferometric array of 19 dishes co-mounted on a steerable platform and operating at 95GHz. One of the main scientific aims of AMiBA is to conduct cluster surveys using the Sunyaev-Zel'dovich (SZ) effect. Here we explore the potential of AMiBA as a tailor-made SZ instrument for the study of cluster physics and cosmology via cluster surveys out to the epoch of cluster formation. In particular, we explore the potential of combining AMiBA cluster surveys with the XMM-LSS (Large Scale Structure) survey.

  2. La Entomofagia en México. Algunos aspectos culturales

    Directory of Open Access Journals (Sweden)

    Felipe Carlos Viesca González

    2009-01-01

    Full Text Available En este trabajo se abordan aspectos culturales del consumo de insectos con fines alimenticios en México y el mundo; particularmente se analiza la entomofagia en la época prehispánica y nuestros días, así como las causas por las cuales ha disminuido el consumo de estos artrópodos. Se explica porqué se ha creado una aversión hacia los insectos en diversos países y algunas regiones de México. Se reflexiona acerca del valor nutritivo de los insectos y las distintas culturas que han hecho posible que sobreviva esta práctica culinaria en el centro y sur del territorio nacional, algunas formas de preparar platillos basados en insectos, así como los problemas que enfrenta actualmente esta costumbre alimenticia entre los mexicanos y sus perspectivas.

  3. Jeroky Mbaekua - aspectos da etnoarte indígena.

    Directory of Open Access Journals (Sweden)

    Oseias de Oliveira

    2015-06-01

    Full Text Available A idéia de arte compartilhada na cultura ocidental tradicionalmente tem sido entendida a partir de elementos conceituais e categorizações que não podem ser aplicados na cultura indígena. Assim, considerar a arte indígena significa observar sua complexidade, de forma a perpassar todas as instâncias da vida desses sujeitos. Desta forma, o texto busca discutir aspectos da etnoarte indígena que não é focada em uma noção de arte centralizada e homogeneizadora mas, sim atenta à uma perspectiva que busca contemplar melhor o seu modo de construção de símbolos, significados e representações culturais.

  4. Aspectos fisiológicos do mountain biking competitivo

    OpenAIRE

    Ricardo Dantas De Lucas; Carlos Eduardo Polazzo Machado; Kristopher Mendes de Souza; Mariana Fernandes Mendes de Oliveira; Luiz Guilherme Antonacci Guglielmo; Veronica Vleck; Benedito Sérgio Denadai

    2010-01-01

    A prática do ciclismo off-road (mountain biking - MTB), cresceu muito nas últimas duas décadas, sendo incluído como esporte olímpico, nos Jogos de Atlanta em 1996, na modalidade Cross Country. Na última década, houve um aumento no número de publicações científicas que verificaram a demanda fisiológica durante competições, assim como o estudo de possíveis preditores da performance nesta modalidade. O objetivo deste estudo de revisão foi descrever alguns aspectos fisiológicos específicos do MTB...

  5. El discurso escolar: aspectos de su formación

    OpenAIRE

    Castañeda, Apolo

    2006-01-01

    En este escrito se analizan los aspectos que configuran el discurso matemático escolar a fin de conocer su naturaleza, eminentemente social, y contribuir a los propósitos específicos de la investigación socioepistemológica que se busca, entre otras acciones, las reconstrucción del discurso matemático escolar. Este análisis se apoya de los resultados de la investigación de Castañeda, (2004) relativo al análisis de obras de texto de antaño, a su tratamiento didáctico y al fenómeno de difusión d...

  6. Cefaleia em salvas: aspectos clinicos e terapeuticos em 26 casos

    Directory of Open Access Journals (Sweden)

    Wilson Luiz Sanvito

    1980-12-01

    Full Text Available Vinte e seis casos de cefaléia-em-salvas são estudados do ponto de vista clínico e terapêutico. Nos aspectos clínicos são ressaltados a dramaticidade deste tipo de cefaléia, o nítido predomínio no sexo masculino, a média de idade dos pacientes, a presença de manifestações associadas e os fatores desencadeantes das crises nos períodos suscetíveis. Do ponto de vista terapêutico três esquemas medicamentosos foram utilizados: maleato de metisergida, prednisona e associação de ambas as drogas. Em 88,3% dos casos um resultado significativo foi alcançado, traduzido por melhora ou abolição das crises.

  7. AMiBA: System Performance

    OpenAIRE

    Lin, Kai-Yang; Li, Chao-Te; Ho, Paul T. P.; Huang, Chih-Wei Locutus; Liao, Yu-Wei; Liu, Guo-Chin; Koch, Patrick M.; Molnar, Sandor M.; Nishioka, Hiroaki; Umetsu, Keiichi; Wang, Fu-Cheng; Wu, Jiun-Huei Proty; Kestevan, Michael; Birkinshaw, Mark; Altamirano, Pablo

    2009-01-01

    The Y.T. Lee Array for Microwave Background Anisotropy (AMiBA) started scientific operation in early 2007. This work describes the optimization of the system performance for the measurements of the Sunyaev-Zel'dovich effect for six massive galaxy clusters at redshifts $0.09 - 0.32$. We achieved a point source sensitivity of $63\\pm 7$ mJy with the seven 0.6m dishes in 1 hour of on-source integration in 2-patch differencing observations. We measured and compensated for the delays between the an...

  8. BaBar Data Aquisition

    CERN Document Server

    Scott, I; Grosso, P; Hamilton, R T; Huffer, M E; O'Grady, C; Russell, J J

    1998-01-01

    The BaBar experiment at the Stanford Linear Accelerator Center is designed to perform a search for CP violation by analysing the decays of a very large sample of B and Bbar mesons produced at the high luminosity PEP-11 accelerator. The data acquisition system must cope with a sustained high event rate, while supporting real time feature extraction and data compression with minimal dead time. The BaBar data acquisition system is based around a common VME interface to the electronics read-out of the separate detector subsystems. Data from the front end electronics is read into commercial VME processors via a custom "personality card" and PCI interface. The commercial CPUs run the Tornado operating system to provide a platform for detector subsystem code to perform the necessary data processing. The data are read out via a non-blocking network switch to a farm of commercial UNIX processors. Careful design of the core data acquisition code has enabled us to sustain events rates in excess of 20 kHz while maintaini...

  9. High spin states of 120Ba

    International Nuclear Information System (INIS)

    The very neutron deficient nucleus 120Ba has been investigated in a high-spin γ-spectroscopic study. The yrast band of 120Ba is extended up to spin 22 ℎ and one tentatively assigned negative-parity side band is observed up to spin 15 ℎ. The experimental results are compared with Total Routhian Surface calculations. (orig.)

  10. CONTRAST STUDY ON CT AND BA IN 3000 PATIENTS

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Objectives: To explore clinical applied value on CT and BA in diagnosis of diseases. Methods:CT and BA were examined in 3000 patients. Results: There were some differences between CT and BA in diagnosis of diseases. Conclusions: BA can supplement shortage of CT. The combination of CT and BA can heighten diagnostic level of diseases.KEY WORDS brain atlas (BA); computed tomography (CT)

  11. Presentaci??n de la Mesa de debate sobre "aspectos fundamentales de las redes

    OpenAIRE

    L??pez Rodr??guez, Marta Sof??a

    2012-01-01

    Redes sociales: de la indignaci??n al cambio. Aspectos Fundamentales de las Redes. Presentaci??n de la Mesa de debate sobre "aspectos fundamentales de las redes" por Marta Sof??a L??pez Rodr??guez (Universidad de Le??n, filolog??a) que modera la mesa. Curso de verano: "Redes sociales: de la indignaci??n al cambio (aspecto ??ticos, pol??ticos y est??ticos)", MUSAC, 21-23 septiembre de 2012, organizado en cooperaci??n con la Universidad Polit??cnica de Munich (HM), BITrum y MyUniversity.

  12. La influencia del Aspecto en la eficiencia del mensaje gráfico publicitario

    OpenAIRE

    Martínez Bouza, José Manuel

    2010-01-01

    La investigación se centra en cómo mejorar la eficiencia del mensaje gráfico publicitario desde la perspectiva formal del diseño y concreta la variación de la preferencia del receptor ante los cambios en los estímulos visuales provocados por los cambios de Aspecto del mensaje gráfico publicitario, así como la importancia del aspecto en el rendimiento comunicativo. El trabajo se orienta hacia el estudio de la influencia del Aspecto en la eficiencia del diseño gráfico aplicado a un sector en al...

  13. Aspectos emocionales del paciente crítico

    Directory of Open Access Journals (Sweden)

    Lucio A. Martha

    1998-12-01

    Full Text Available

    This paper analyzes the emotional answer of the people we call "critical patient", the relationship between nurse-patient is the most significant point of view and the influence of this relationship in the mental state of both; a special reference is made to the connotation of the "patient" and "critical" term and the emotional expression of comfort or discomfort.

    El presente ensayo es un análisis sobre las respuestas emocionales y en general las actitudes de aquellas personas a quienes llamamos "pacientes críticos", el aspecto novedoso consiste en que su mirada se hace desde la relación paciente-cuidador y en como ésta influye en los comportamientos de los involucrados; igualmente busca reflexionar acerca de las connotaciones que los vocablos "paciente" y "crítico" imprimen al manejo de la relación y como consecuencia al bien-estar o mal-estar de la persona enferma.

  14. Psicopatología descriptiva : aspectos cualitativos y cuantitativos

    Directory of Open Access Journals (Sweden)

    Germán E. Berrios

    2013-09-01

    Full Text Available En el presente artículo se discuten algunos aspectos que afectan a la comprensión y al funcionamiento de la psicopatología descriptiva (PD, la cual proporciona un lenguaje descriptivo a la psiquiatría y las bases para sus constructos nosológicos. La PD formula postulados sobre la naturaleza de su objeto de estudio y sus causas subyacentes (haciendo uso del modelo médico. Se propone que la PD necesita una recalibración histórica, clínica y numérica. En relación a esto, se sugiere que en algunos casos, en contra de los principios psicométricos tradicionales, ciertos instrumentos deberán ser construidos de un modo flexible que permita que varíen de acuerdo a las necesidades descriptivas que presenten casos individuales. This paper deals with some of the issues that affect the understanding and functioning of descriptive psychopathology (DP. The latter remains the language of description in psychiatry and the basis for her nosological constructs. DP makes assumptions concerning the nature of its object and its underlying causes (i.e. makes use of the medical model. DP needs historical, clinical and numerical recalibration. It is suggested that in some cases, and against traditional psychometric principles, some instruments will have to be constructed that show flexibility and can be varied according to the descriptive needs presented by individual cases.

  15. AMiBA, XMM, and Cluster Surveys

    OpenAIRE

    Liang, Haida

    2001-01-01

    The Array for Microwave Background Anisotropy (AMiBA) is an interferometric array of 19 dishes co-mounted on a steerable platform and operating at 95GHz. One of the main scientific aims of AMiBA is to conduct cluster surveys using the Sunyaev-Zel'dovich (SZ) effect. Here we explore the potential of AMiBA as a tailor-made SZ instrument for the study of cluster physics and cosmology via cluster surveys out to the epoch of cluster formation. In particular, we explore the potential of combining A...

  16. Microstructures of BaZrO3-doped ErBa2Cu3Oy films fabricated by different BaZrO3 supply

    International Nuclear Information System (INIS)

    ErBa2Cu3Oy films including BaZrO3 are deposited using three types of targets by PLD to realize the self-oriented growth of BaZrO3 nanorods. Microstructures of the obtained films are observed using a transmission electron microscope (TEM). On the basis of the cross-sectional TEM images, the growth mechanism of the BaZrO3 nanorods is discussed. When about a half of BaZrO3-monolayer is added, it is found that the BaZrO3 is not widely segregated to BaZrO3 region and no BaZrO3 region on the ErBa2Cu3Oy surface but the BaZrO3 is homogeneously distributed with approximately 10 nm periods on the ErBa2Cu3Oy surface. As a result, the crystal stress due to the differences of crystal length between the ErBa2Cu3Oy and BaZrO3 are introduced for every 10 nm to the films. This behavior is probably the origin of the self-oriented growth of BaZrO3 nanorods

  17. Electrochemical Oxidation of BaFeO2.5 to BaFeO3

    International Nuclear Information System (INIS)

    Defect perovskite-type BaFeO2.5 was oxidized to BaFeO3 by an electrochemical method in an alkaline aqueous electrolyte at 25 °C. With increase in the charge transfer q (electrons/formula unit), BaFeOz showed monoclinic (at nearly q = 0), rhombohedral (at around q = 0.34), pseudo-cubic (at 0.78 ≤ q ≤ 0.89), and true cubic (at q ≥ 0.89) structures. While an oxygen evolution reaction (OER) started at ca. q = 0.80, the oxidation of BaFeOz could concurrently be continued with the OER and BaFeO3 was obtained at q = 1.2. Further, the chemical potential of oxygen in BaFeOz could be estimated in the range of 2.5 ≤ z ≤ 2.87 without OER

  18. Exoelectron emission of heat induced BaSO/sub 4//BaS conversion

    Energy Technology Data Exchange (ETDEWEB)

    Chryssou, E. (Technical Univ. of Athens (Greece). Physics Dept.)

    1983-01-01

    The conversion BaSO/sub 4//BaS was investigated by exoemission (TSEE), X ray diffraction (XD) and differential thermal analysis (DTA) measurements. ''Pure'' BaSO/sub 4/ (MERCK and B.D.G. products) is not decomposed chemically by heating to 1200/sup 0/C; only a redistribution of lattice defects and impurities occurs and the ..cap alpha.. to ..beta.. phase change at 1160/sup 0/C can be detected. The formation of BaS starts at 700/sup 0/C to 800/sup 0/C in a solid/solid reaction with previously admixed graphite. The original single peak glow curve of BaSO/sub 4/ splits off and the very strong original TSEE efficiency drops by 3 to 4 orders of magnitude when the graphite-affected conversion to BaS is completed within a 1 h heating at 1200/sup 0/C.

  19. Brucelosis bovina, aspectos históricos y epidemiológicos

    OpenAIRE

    Y. Rodríguez Valera,; W. Ramírez Sánchez,; Antúnez Sánchez, G; F. Pérez Benet; Y. Ramírez Pérez; Adria Igarza Pulles

    2005-01-01

    El presente trabajo puntualiza algunos aspectos sobre la historia de la enfermedad, animales susceptibles, distribución, transmisión, reservorios naturales, fuente de infección, transmisión, factores de riesgo asociados y eliminación del agente al medio; aspectos epidemiológicos de suma importancia. The present work remarks some aspects of history of the disease, susceptible animals, distribution, transmission, natural reservorios, source infection, transmission, associate factors of risk and...

  20. Aspectos psicosociales asociados al comportamiento sexual en jóvenes

    OpenAIRE

    Chávez, Mayra; Universidad Autónoma de Coahuila; Álvarez, Javier; Universidad Autónoma de Nuevo León

    2013-01-01

    El objetivo del presente estudio exploratorio, transversal, con muestreo por conglomerados, consistió en detectar las opiniones de jóvenes sobre aspectos del contexto que influyen en su comportamiento sexual. El instrumento utilizado registra las opiniones acerca de la familia, escuela, pares, lugares, aspectos sexuales y otros. Las respuestas muestran diferencias significativas por sexo en cuanto a la percepción de la influencia de la información del padre sobre las mujeres y la recibida en ...

  1. Estimación de riesgo por exposición a compuestos alérgenos en productos de baño infantiles

    OpenAIRE

    Díaz Castaño, Pablo

    2011-01-01

    El aumento del uso de sustancias químicas en todos los aspectos de la vida diaria ha provocado una cada vez mayor preocupación por los riesgos de daños a la salud debido a la exposición a los mismos. Especial atención merecen aquellos compuestos químicos que son utilizados en productos especialmente destinados al público infantil, como juguetes, productos de baño, colonias, etc. Está demostrado que la exposición a algunas de estas sustancias puede producir alergias en los seres...

  2. Thermophysical properties of BaUO4

    International Nuclear Information System (INIS)

    Polycrystalline specimens of barium uranate, BaUO4, were prepared and several properties such as the thermal expansion coefficient, elastic moduli, thermal conductivity, and Debye temperature were evaluated. The sintered specimens had a single-phase orthorhombic structure and were crack-free. The elastic moduli of BaUO4 were determined from the longitudinal and shear sound velocities and from micro-indentation tests. The Debye temperature was also determined from the sound velocities and lattice parameter measurements. The thermal conductivity of BaUO4 was calculated from the measured density at room temperature, literature values of heat capacity, and thermal diffusivity measured by the laser flash method in vacuum. The thermophysical properties of BaUO4 were examined and compared with literature data for other barium ternary oxides and SrUO4

  3. Refractarios: un aspecto clave en la industria del cemento

    Directory of Open Access Journals (Sweden)

    Castillo Neira, Percy

    1985-09-01

    Full Text Available To sit in judgement values of the technic level reached in a cement plant, it is surprisingly objetive to analyse work, planning and control development about Refractories subject. Considering and recognizing the validity of this pragmatic axiom it will offer unexpected improvement perspectives of the productivity rates and production records. This work pretends to be a contribution for this purpose, bringing some theoretic and practical accounts about de conditions offered by the Kiln-Exchanger-Cooler most diffused system, analyzing the characteristics that refractory material must have, in accordance with each zone, and finally, including some appraisals and recommendations regarding some of the manifold aspects which belongs to one of the most interesting ad complex fields of cement industry.

    Para establecer un juicio de valor respecto al nivel técnico alcanzado en una planta cementera resulta sorprendentemente objetivo analizar el trabajo, planificación y control que se desarrolla alrededor del tema de Refractarios. Considerarlo y reconocer la validez de este axioma pragmático ofrecerá inusitadas perspectivas de superación de índices de productividad y récords de producción. En este trabajo se pretende un aporte a tal objetivo proporcionando algunas consideraciones teórico-prácticas sobre las condiciones que se presentan en el sistema Horno Intercambiador-Enfriador, más difundido, analizando las características que debe reunir el material refractario para cada zona y, finalmente, incluyendo algunas apreciaciones y recomendaciones principalmente de criterio, respecto a algunos de los múltiples aspectos que forman parte de uno de los campos más interesantes y complejos de la industria del cemento.

  4. Aspectos anatomopatológicos del linfosarcoma en el cerdo

    Directory of Open Access Journals (Sweden)

    A. RUIZ

    1997-01-01

    Full Text Available Se describen tres casos de linfosarcoma en cerdos de planteles de crianza industrial, dos de los cuales tenían un peso vivo de 60 kg y el tercer caso correspondió a una hembra reproductora de 280 kg de peso vivo. Los animales no presentaban signos ni síntomas clínicos específicos atribuibles a la enfermedad. A la necropsia se observó: aumento de tamaño de los ganglios linfáticos, bazo, hígado y placas de Peyer; presencia de un puntillado o nodulaciones blancas de tamaño variable en hígado y riñón. Histopatológicamente estos tejidos tenían infiltraciones de células de origen linfoide, y de aspecto de linfosarcoma.Three cases of lymphosarcoma in industrially-bred pigs are described, in which two of the pigs had a live weight of 60 kg, and the third, a reproductive female, had a live weight of 280 kg. The animals did not present any signs, nor specific clinical symptoms attributable to the disease. During the necropsy, an enlargement in the size of the lymphatic nodes, spleen, liver, and Peyer’s Plate was observed, as was the presence of white spots or nodules of various sizes on the liver and kidney. The histopathology carried out on the tissue revealed the presence of cells of lymphoid origin, and of a histological aspect of lymphosarcoma.

  5. The DIRC detector at BaBar

    International Nuclear Information System (INIS)

    A dedicated particle identification system based on the Detection of Internally Reflected Cherenkov (DIRC) light will be used in the BaBar detector. We provide an overview of the DIRC concept, design, and expected performance of the production device and a status report on its construction and commissioning. The DIRC is expected to be operating in the BaBar detector on beam line at the PEP-II B Factory in late spring 1999

  6. AMiBA First SZ Measurements

    Science.gov (United States)

    Lin, K.-Y.; Wu, J.-H. P.; Umetsu, K.; Kock, P.; Liu, G.-C.; Nishioka, H.; Huang, C.-W.; Liao, Y.-W.; Wang, F.-C.; Ho, P.

    2008-10-01

    Y.T.Lee Array for Microwave Background Anisotropy (AMiBA) is an array utilizing the 90GHz band to measure the CMB power spectrum and the Sunyaev-Zeldovich effect of galaxy clusters. The first stage with seven antennae has been completed, and the second stage with thirteen antennae is being constructed. Using the seven-element array, AMiBA has performed observations on six massive galaxy clusters at redshifts 0.09 - 0.32 during 2007.

  7. The AMiBA Hexapod Telescope Mount

    OpenAIRE

    Koch, Patrick M.; Kesteven, Michael; Nishioka, Hiroaki; Jiang, Homin; Lin, Kai-Yang; Umetsu, Keiichi; Huang, Yau-De; Raffin, Philippe; Chen, Ke-Jung; Ibanez-Romano, Fabiola; Chereau, Guillaume; Huang, Chih-Wei Locutus; Chen, Ming-Tang; Ho, Paul T. P.; Pausch, Konrad

    2009-01-01

    AMiBA is the largest hexapod astronomical telescope in current operation. We present a description of this novel hexapod mount with its main mechanical components -- the support cone, universal joints, jack screws, and platform -- and outline the control system with the pointing model and the operating modes that are supported. The AMiBA hexapod mount performance is verified based on optical pointing tests and platform photogrammetry measurements. The photogrammetry results show that the defo...

  8. High-Spin States in 124Ba

    International Nuclear Information System (INIS)

    High-spin states in 124Ba were populated using the 64Ni(64Ni, 4n)124Ba reaction at beam energies of 255 and 261 MeV. Gamma-ray coincidences were measured using the EUROBALL detector array. The charged-particle detector array DIAMANT provided channel selection. The previously known rotational bands are extended to higher spins. Five new bands are observed, one of them extends up to the spin 40ℎ region. (author)

  9. High-Spin States in 124Ba

    Science.gov (United States)

    Al-Khatib, A.; Singh, A. K.; Huebel, H.; Bringel, P.; Buerger, A.; Neusser, A.; Schoenwasser, G.; Hagemann, G. B.; Hansen, C. R.; Herskind, B.; Sletten, G.; Algora, A.; Dombradi, Zs.; Gal, J.; Kalinka, G.; Molnar, J.; Nyako, B. M.; Sohler, D.; Timar, J.; Zolnai, L.; Kmiecik, M.; Maj, A.; Styczen, J.; Zuber, K.; Hauschild, K.; Korichi, A.; Lopez-Martens, A.; Roccaz, J.; Siem, S.; Hannachi, F.; Scheurer, J. N.; Bednarczyk, P.; Byrski, Th.; Curien, D.; Dorvaux, O.; Duchene, G.; Gall, B.; Khalfallah, F.; Piqueras, I.; Robin, J.; Juhasz, K.; Patel, S. B.; Evans, A. O.; Rainovski, G.; Airoldi, A.; Benzoni, G.; Bracco, A.; Camera, F.; Million, B.; Mason, P.; Paleni, A.; Sacchi, R.; Wieland, O.; Petrache, C. M.; Petrache, D.; La Rana, G.; Moro, R.; de Angelis, G.; Fallon, P.; Lee, I.-Y.; Lisle, J. C.; Cederwall, B.; Lagergren, K.; Lieder, R. M.; Podsvirova, E.; Gast, W.; Jaeger, H.; Redon, N.; Goergen, A.

    2005-04-01

    High-spin states in 124Ba were populated using the 64Ni(64Ni,4n)124Ba reaction at beam energies of 255 and 261 MeV. Gamma-ray coincidences were measured using the EUROBALL detector array.The charged-particle detector array DIAMANT provided channel selection. The previously known rotational bands are extended to higher spins. Five new bands are observed, one of them extends up to the spin 40 hbar region.

  10. AMiBA: System Performance

    CERN Document Server

    Lin, Kai-Yang; Ho, Paul T P; Huang, Chih-Wei Locutus; Liao, Yu-Wei; Liu, Guo-Chin; Koch, Patrick M; Molnar, Sandor M; Nishioka, Hiroaki; Umetsu, Keiichi; Wang, Fu-Cheng; Wu, Jiun-Huei Proty; Kestevan, Michael; Birkinshaw, Mark; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao; Chang, Su-Wei; Chen, Ming-Tang; Martin-Cocher, Pierre; Han, Chih-Chiang; Huang, Yau-De; Hwang, Yuh-Jing; Ibañez-Roman, Fabiola; Jiang, Homin; Kubo, Derek Y; Oshiro, Peter; Raffin, Philippe; Wei, Tashun; Wilson, Warwick; Chen, Ke-Jung; Chiueh, Tzihong

    2009-01-01

    The Y.T. Lee Array for Microwave Background Anisotropy (AMiBA) started scientific operation in early 2007. This work describes the optimization of the system performance for the measurements of the Sunyaev-Zel'dovich effect for six massive galaxy clusters at redshifts $0.09 - 0.32$. We achieved a point source sensitivity of $63\\pm 7$ mJy with the seven 0.6m dishes in 1 hour of on-source integration in 2-patch differencing observations. We measured and compensated for the delays between the antennas of our platform-mounted interferometer. Beam switching was used to cancel instrumental instabilities and ground pick up. Total power and phase stability were good on time scales of hours, and the system was shown to integrate down on equivalent timescales of 300 hours per baseline/correlation, or about 10 hours for the entire array. While the broadband correlator leads to good sensitivity, the small number of lags in the correlator resulted in poorly measured bandpass response. We corrected for this by using extern...

  11. Algunos aspectos técnicos sobre la liofilización de pulpa de cocona (Solanum sessiliflorum Dunal

    Directory of Open Access Journals (Sweden)

    Leynard Natividad Marín

    2013-12-01

    Full Text Available La cocona (Solanum sessiliflorum Dunal es una fruta ampliamente distribuida en la Amazonia Sudamericana, con buenas características nutricionales y antioxidantes. El objetivo de este trabajo fue deshidratar la pulpa de cocona mediante liofilización para evaluar algunos aspectos técnicos de un nuevo tipo de producto que permita su mejor comercialización y mayores usos en la industria alimentaria. Los frutos fueron adquiridos en el Mercado Central de Frutas de Lima (Perú y procesados en el Centro Experimental Tecnológico de la Universidad Nacional del Callao (Callao, Perú. Fue realizado un acondicionamiento y liofilización de la materia prima; en el primero la muestra fue cortada, escaldada, pelada, despulpada, refinada y concentrada al vacío a temperatura de baño de 60 ºC durante 15 minutos y presión de -800 mbar; mientras que en la segunda, se congelaron previamente las muestras durante 12 horas a -20 ºC para su sublimación durante 24 horas a una presión inferior a 200 μHg. Asimismo, se determinaron los rendimientos y contenidos de humedad en el proceso. Se realizaron caracterizaciones en la pulpa refinada, muestra liofilizada y en la pulpa liofilizada reconstituida: contenido de humedad, proteína, extracto etéreo, cenizas, carbohidratos incluido el contenido de fibra, densidad, viscosidad, sólidos solubles, azúcares reductores, acidez titulable, pH y solubilidad, según fue el caso. Se obtuvo un polvo higroscópico, con solubilidad en agua de 84,33 % y con ligeras variaciones en sus características con respecto al producto inicial.

  12. Epidemiological aspects in neuroschistosomiasis Aspectos epidemiologicos na neuroesquistossomose

    Directory of Open Access Journals (Sweden)

    Claudio Henrique Fernandes Vidal

    2010-02-01

    Full Text Available The urbanization process of schistosomiasis has been described in the literature. The present report shows and discusses some epidemiological aspects of neuroschistosomiasis that emphasizes this trend. Method: The study was done between July, 2005 and June, 2006, and consisted of spinal cord schistosomiasis carriers at the moment of diagnosis. These patients were evaluated whatever the origin and period of the year that they developed the symptoms. Results: A total of 13 patients were evaluated. Ten cases (76.92% came from the Metropolitan Region of Recife, while the other zones (Zona da Mata, Agreste e Sertão contributed with just three cases (23.07%. October, November and December (post rainy period concentrated the majority of the cases (61.54%. Conclusion: The high spatial and temporal concentration of cases in relation to a recent endemic area for Schistosomiasis suggests that the immunological status may be an important factor for installation of Sschistosomal myelitis.O processo de urbanização da esquistossomose vem sendo descrito na literatura. O presente estudo apresenta e discute alguns aspectos epidemiológicos na neuroesquistossomose que confirmam essa tendência. Método: O estudo foi realizado entre julho de 2005 e junho de 2006, sendo composto por portadores de mielite esquistossomótica no momento do diagnóstico. Os pacientes foram avaliados quanto à procedência e ao período do ano que desenvolveram a doença. Resultados: No total foram 13 pacientes avaliados, sendo 10 casos (76,92% provenientes da Região Metropolitana do Recife, enquanto as demais regiões (Zona da Mata, Agreste e Sertão contribuíram com apenas um caso cada. Os meses de outubro, novembro e dezembro concentraram a maioria dos pacientes (61,54%. Conclusão: A alta concentração espacial e temporal de casos em relação a uma área endêmica recente para esquistossomose sugere que a participação de fatores imunológicos possa ser importante para o

  13. Aspectos fisiológicos do mountain biking competitivo

    Directory of Open Access Journals (Sweden)

    Ricardo Dantas de Lucas

    2010-12-01

    Full Text Available A prática do ciclismo off-road (mountain biking - MTB, cresceu muito nas últimas duas décadas, sendo incluído como esporte olímpico, nos Jogos de Atlanta em 1996, na modalidade Cross Country. Na última década, houve um aumento no número de publicações científicas que verificaram a demanda fisiológica durante competições, assim como o estudo de possíveis preditores da performance nesta modalidade. O objetivo deste estudo de revisão foi descrever alguns aspectos fisiológicos específicos do MTB Cross Country (MTB CC competitivo (intensidade de provas, perfil fisiológico de atletas de elite, uso de suspensões e determinantes da performance em subidas. Observa-se na literatura analisada que as provas de MTB CC parecem impor uma sobrecarga fisiológica maior, quando analisada através da frequência cardíaca, do que provas de ciclismo de estrada com duração semelhante. Entretanto, quando analisada pela potência de pedalada, observa-se claramente a característica intermitente da modalidade, com variações de potência durante a prova entre zero e 500W, e potência média relativamente baixa em comparação aos valores de FC encontrados. Outro fator importante levantado neste estudo são as alterações fisiológicas decorrentes do uso de suspensões nas bicicletas de MTB CC. O uso deste equipamento reduz o estresse muscular provocado pelo terreno acidentado, embora pareça não afetar o gasto energético total, tanto em percurso plano como em subidas. Entretanto, é fato que o desempenho em circuitos acidentados é melhorado com o uso das suspensões. Com base nos estudos abordados nessa revisão, conclui-se que o MTB CC enquanto modalidade competitiva apresenta uma grande variação de intensidade (avaliada através da potência, sendo esta atribuída principalmente ao tipo de terreno (irregular e com muitas aclives e declives acentuados em que as provas de MTB CC acontecem.

  14. Sialometria: aspectos de interesse clínico

    Directory of Open Access Journals (Sweden)

    Denise Pinheiro Falcão

    2013-12-01

    Full Text Available A saliva total é um complexo de secreções multiglandulares composto de fluido gengival, células epiteliais descamadas, microrganismos, produtos do metabolismo bacteriano, resíduos alimentares, leucócitos, muco da cavidade nasal e da faringe. A saliva possui diversas funções, incluindo reparação tecidual, tamponamento, proteção, digestão, gustação, ação antimicrobiana, manutenção da integridade do dente e sistema de defesa antioxidante. A redução do fluxo salivar (hipossalivação é um distúrbio comum, e estima-se que cerca de 20% da população geral tenham esta alteração. A hipossalivação pode ser decorrente de diabetes mellitus, hipotireoidismo, desidratação, comprometimento do parênquima glandular por processos infecciosos, doenças granulomatosas ou condições autoimunes e inflamatórias (como a síndrome de Sjögren e a artrite reumatoide, radioterapia da região cefálica e/ou cervical, bem como pode estar associada a distúrbios do humor, efeitos adversos ocasionados pelo uso de algumas medicações ou, ainda, ser de causa idiopática. As terapias convencionais para o tratamento da redução do fluxo salivar, com o uso de sialogogos gustatórios e químicos, ainda apresentam restrições. Contudo, novas alternativas têm mostrado grande perspectiva no tratamento deste problema. Diagnosticar um paciente como hipossalivador crônico é um desafio na prática clínica, e os métodos de avaliação do fluxo salivar são pouco conhecidos pelos reumatologistas. A avaliação seriada do fluxo salivar é importante para o correto diagnóstico e prognóstico de determinadas condições bucais e sistêmicas. Esta revisão aborda alguns aspectos relacionados à função da saliva, às consequências da hipossalivação e aos métodos de medição da taxa de fluxo salivar, conceitos úteis na prática diária do reumatologista.

  15. Aspectos imunológicos da Leishmaniose Cutis Difusa

    Directory of Open Access Journals (Sweden)

    Aloysio Argollo

    1977-06-01

    Full Text Available Um caso de Leishmaniose Cutis Difusa é estudado quanto aos seus aspectos imunológicos. A imunidade celular foi investigada com testes intradérmicos, sensibilização artificia! do DNCB e dosagem de fator de inibição do macrófago (MIF. Embora alguns antígenos injetados tivessem dado reação positiva, a leishmanina foi não reatora evidenciando uma anergia específica. As imunoglobulinas G e M estavam elevadas. 0 encontro de anticorpos circulantes por alguns autores associando ao fato de que o complemento C3 era baixo em nosso paciente, levou-nos a considerar o consumo deste que fixado a complexos Ag-Ac circulantes poderiam explicar os surtos de febre e artralgias. Por fim são considerados os pontos de vista de autores diferentes em relação ao fato de que a LCD seria causada por espécie diferente de leishmânia, ou por defeito imunológico do paciente, destacando-se o trabalho de Convit³ em favor desta útlima hipótese.A case of Cutis Diffuse Leishmaniasis is studied in respect to its immuno logical aspects. Cell mediated immunity was investigated with a battery of nine intradermal antigens, using disposable 1.0 ml tuberculin syringes, with 25 guage oedles. Also, artificial sensibilization to the DNCB and dosage of the Macrophage Inhibiting Factor (MIF were carried out. Some of the intradermal tests were positive and the leishmanine reaction was negative showing specific anergy. The G and M immunoglobulines were elevated. Since circulating antibodies have been described in the literatura and our patient had tpe C³ complement at a low level we ponder about its consumption fixed to Ag-Ac complexes, which could explain the episodes of fever and arthralgias. Finally, the view points of different authors are considered in relation to the fact that CDL would be caused by a different species of leishumania, or by immunological defect of the host. Convit's reatons undoubtedly favors th is last hypothesis.

  16. Measurement of the cross-sections of radioactive Ba isotopes

    International Nuclear Information System (INIS)

    The radioactive Ba isotopes are produced in the interaction of 60 MeV/u 18O with 232Th. Ba is separated from thorium and complex reaction product mixture by BaCl2 precipitation and purified. 133Ba is used as the tracer to determine chemical yield of Ba. The Ba fraction is measured by off-line gamma-ray spectroscopy. The formation cross-sections of the individual Ba isotope is calculated from the intensities of gamma-ray peaks of each Ba isotope as well as relative nuclear data. The results show the n-deficient Ba isotopes still have higher formation cross-sections under the conditions of intermediate energy projectile and thick targets

  17. Redes solidárias em vigilância sanitária: a rede de gerenciamento da comida de rua em Salvador, BA – Brasil / Network solidarity in health surveillance: a management network for street food in Salvador, BA - Brazil

    OpenAIRE

    Cristian Oliveira Benevides Sanches Leal; Carmen Fontes Teixeira

    2015-01-01

    O objetivo desse trabalho é analisar os limites e possibilidades do arranjo em rede como alternativa para o gerenciamento do risco relacionado à comida de rua. Discute-se a pertinência da organização de redes solidárias em vigilância sanitária (Visa), com base em um estudo de caso da Rede de gerenciamento da comida de rua, em Salvador/BA, entre 2008 a 2011. A metodologia incluiu entrevistas semi-estruturadas com membros da rede e utilização de imagens que revelam aspectos da situação da co...

  18. High spin properties of 124Ba

    Indian Academy of Sciences (India)

    K Ilangovan; N Arunachalam

    2002-03-01

    The 124Ba nucleus is investigated on the basis of the method of statistical mechanics by assuming the nucleons to move in triaxially deformed Nilsson potential. The variation in the Fermi energies of protons and neutrons is studied as a function of spin and temperature. The Fermi energies determined as a function of angular momentum is used to study the dependence of shell correction on angular momentum using the Strutinsky smoothing procedure. The most important observation is that the shell correction is almost the same for all spins for 124Ba. The spin cutoff parameter and the single particle level density parameter are studied as a function of spin and temperature. Constant entropy lines drawn by plotting the excitation energy against angular momentum are found to be roughly at constant energy above the yrast line and are almost equally spaced. It is observed that no yrast traps are present for 124Ba.

  19. BaMO3 (M=Zr, Hf, Sn) material dependence of Tc reduction in BaMO3-doped SmBa2Cu3Oy, films

    International Nuclear Information System (INIS)

    For the improvement of superconducting properties of BaMO3 (M=Zr, Sn, HQ-doped REBa2Cu3Oy films, we focused on the Tc reduction caused by lattice misfit between BaMO3 and REBa2Cu3Oy. We compared the influence on the Tc reduction of BaZrO3, BaSnO3 and BaHfO3-doped SmBa2Cu3Or (SmBCO) films with various BMO contents. From the correlation between configuration of nanorods and c-axis expansion, it was suggested that the lattice strain working on the SmBCO matrix became stronger in the order of BaHfO3, BaZrO3 and BaSnO3. Therefore, the combination of SmBCO and BaHfO3 is better regarding the suppression of the Tc reduction compared with other combinations of SmBCO and BaMO3.

  20. Interfaz web para BaDELE3000

    OpenAIRE

    González Izquierdo, Adrián

    2012-01-01

    El objetivo del presente Trabajo de Fin de Carrera es el estudio, diseño e implementación de una aplicación web que sirva de interfaz para una base de datos relacional llamada BaDELE3000 que trabaja actualmente con unos 3000 lexemas y sigue en fase de desarrollo. BaDELE modela conceptos y principios lingüísticos más o menos complejos, dentro del marco de la Teoría Sentido-Texto. El desarrollo de esta interfaz, permitirá a personas autorizadas, seguir nutriendo la base de datos. La memoria est...

  1. Track Finding Efficiency in BaBar

    CERN Document Server

    Allmendinger, T; Brown, D N; Choi, H; Christ, S; Covarelli, R; Davier, M; Denig, A G; Fritsch, M; Hafner, A; Kowalewski, R; Long, O; Lutz, A M; Martinelli, M; Muller, D R; Nugent, I M; Pegna, D Lopes; Purohit, M V; Prencipe, E; Roney, J M; Simi, G; Solodov, E P; Telnov, A V; Varnes, E; Waldi, R; Wang, W F; White, R M

    2012-01-01

    We describe several studies to measure the charged track reconstruction efficiency and asymmetry of the BaBar detector. The first two studies measure the tracking efficiency of a charged particle using $\\tau$ and initial state radiation decays. The third uses the $\\tau$ decays to study the asymmetry in tracking, the fourth measures the tracking efficiency for low momentum tracks, and the last measures the reconstruction efficiency of $K_S^0$ particles. The first section also examines the stability of the measurements vs BaBar running periods.

  2. La gestión por procesos, su surgimiento y aspectos teóricos

    OpenAIRE

    Daysi Ruiz-Fuentes; Rosa Mercedes Almaguer - Torres; Isabel Cristina Torres-Torres; Alejandro Miguel Hernández-Peña

    2013-01-01

    Abordó aspectos históricos y teóricos relacionados con la gestión por procesos, se precisa las potencialidades de su aplicación para el perfeccionamiento de la dirección de las empresas. Presentó un análisis de diferentes definiciones de este término a partir del c ual se determinan las regularidades que lo caracterizan. Se puntualizan algunos aspectos teóricos vinculados con esta forma de gestión empresarial.

  3. La gestión por procesos, su surgimiento y aspectos teóricos

    Directory of Open Access Journals (Sweden)

    Daysi Ruiz - Fuentes

    2013-01-01

    Full Text Available Abordó aspectos históricos y teóricos relacionados con la gestión por procesos, se precisa las potencialidades de su aplicación para el perfeccionamiento de la dirección de las empresas. Presentó un análisis de diferentes definiciones de este término a partir del c ual se determinan las regularidades que lo caracterizan. Se puntualizan algunos aspectos teóricos vinculados con esta forma de gestión empresarial.

  4. Chlamydia trachomatis: Aspectos microbiológicos, clínicos y epidemiológicos.

    OpenAIRE

    Matta, Salim; Arango, Álvaro I.; Visbal, Jorge

    2001-01-01

    Se presenta una revisión completa de los principales aspectos microbiológicos, clínicos y epidemiológicos de Chlamydia trachomatis. Se hace énfasis en los mecanismos particulares de invasividad, tipo de receptores, aspectos epidemiológicos y factores genéticos de susceptibilidad entre otros. Se abordan las patologías que ocasiona Chlamydia trachomatis separando las infecciones en el hombre, mujer y niños. También se realiza una actualización sobre los diferentes métodos de diagnóstico d...

  5. Métricas aplicadas a la programación orientada a aspectos

    OpenAIRE

    Baigorria, Lorena; Montejano, Germán Antonio

    2006-01-01

    Encontramos muchos problemas de programación para los cuales las técnicas de programación procedural o orientadas a objetos (OO) no son suficientes para capturar algunas de las decisiones importantes de diseño, que el sistema debe implementar. La Programación Orientada a Aspectos (POA) es una técnica que ha surgido para mejorar la separación de las competencias en la programación de software. La Orientación a Aspectos (OA) se basa en tecnologías existentes, como la orientación a objetos...

  6. Aspectos sobre travestilidade e envelhecimento : história, corpo e imigração

    OpenAIRE

    Mountian, Ilana

    2015-01-01

    Esse artigo traz algumas reflexões sobre travestilidade e envelhecimento, baseadas na pesquisa Travestilidade e Envelhecimento. O tema do envelhecimento da população travesti e transsexual é pouco investigado nas pesquisas brasileiras, e há aqui uma grande gama de aspectos que necessitam de visibilidade e debate. Considerando o contexto transfóbico em que se encontram, destaca-se aqui aspectos levantados na pesquisa relacionados à saúde da população travesti e das mulheres trans em relação às...

  7. Aspectos ambientales a considerar en vertederos: Emplazamiento y emisiones de biogás

    OpenAIRE

    Colomer Mendoza, Francisco José; García Darás, Ferran; Vives Peris, Vicente; Herrera Prats, María Lidón; Robles Martínez, Fabián

    2013-01-01

    El principal objetivo de este trabajo ha sido identificar los aspectos ambientales que más se tienen en cuenta a la hora de otorgar la autorización ambiental a los proyectos de vertederos controlados. Cuando un proyecto de vertedero y su correspondiente estudio de impacto ambiental son sometidos al procedimiento administrativo de la evaluación de impacto ambiental, el órgano ambiental concede la autorización mediante la declaración de impacto ambiental. En ésta, además se detallan los aspecto...

  8. El diseño de sistemas interactivos multimedia de aprendizaje : aspectos básicos

    OpenAIRE

    Tirado Morueta, Ramón

    1996-01-01

    Tomando como punto de partida el desarrollo del concepto de Sistemas Interactivos Multimedia para el Aprendizaje (SIMA) en base a su caracter interactivo y multimedia, este trabajo trata de ofrecer pistas relativas a su diseño. Se exponen diversas dimensiones que se encuentran en la literatura sobre Diseño de Sistemas Instruccionales (DSI) como aspectos básicos y generales en el desarrollo del proceso de diseño de SIMA. Estos aspectos básicos son herramientas que pueden utilizarse...

  9. Aspectos psicosociales del embarazo en la adolescencia, año 2000

    OpenAIRE

    Elena Ávila Gálvez; Maylén Cid Santana; Ileana García Imia; Antonio Lorenzo González; Pablo Rodríguez

    2002-01-01

    Se realizó un estudio explicativo-observacional, de tipo estudio de casos y controles, en adolescentes entre 10 y 19 años, del sexo femenino, provenientes del Policlínico Docente "Wilfredo Pérez Pérez", en el año 2000, compartidos en 2 grupos: el estudio, con 53 casos que se embarazaron, y el control con 106 adolescentes que no lo hicieron. Se compararon diferentes aspectos de la sexualidad, esfera familiar y sociodemográficos, con el fin de determinar la influencia de algunos aspectos psicos...

  10. Aspectos de la Sintaxis del Rromané de Chile en Textos Orales Tradicionales

    OpenAIRE

    Gastón Felipe Salamanca Gutiérrez; Álvaro Javier González Concha

    2011-01-01

    Este artículo corresponde a la segunda parte y final de nuestra investigación "Aspectos de la Sintaxis del Rromané de Chile en Textos Orales Tradicionales(I)". Se incluyen aquí los tipos de frases modificadas no descritas en nuestra primera presentación (FMAdj, FMAdv, FApos, FSeriada y FC-Eje) y los aspectos más relevantes de la sintaxis del rromané en el nivel de la Oración. Se describen los tagmemas identificados y sus instanciadores, además de los tipos de oraciones encontrados. Concluimos...

  11. Intercomparision of Standardized Radioactive Solution of 133Ba

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    <正>133Ba is a very important nuclide in the field of radiation, for example applied to efficienency calibration of the γ spectromenter. To ensure the accurate and reliable of measurement results of 133Ba, to

  12. Incorporation of Ba in Al and Fe pollucite

    Science.gov (United States)

    Vance, Eric R.; Gregg, Daniel J.; Griffiths, Grant J.; Gaugliardo, Paul R.; Grant, Charmaine

    2016-09-01

    Ba, the transmutation product of radioactive Cs, can be incorporated at levels of up to ∼0.07 formula units in Cs(1-2x)BaxAlSi2O6 aluminium pollucite formed by sol-gel methods and sintering at 1400 °C, with more Ba forming BaAl2Si2O8 phases. The effect of Ba substitution in pollucite-structured CsFeSi2O6 was also studied and no evidence of Ba substitution in the pollucite structure via cation vacancies or Fe2+ formation was obtained. The Ba entered a Fe-silicate glass structure. Charge compensation was also attempted with a Cs+ + Fe3+ ↔ Ba2+ + Ni2+ scheme but again the Ba formed a glass and NiO was evident. PCT leaching data showed CsFeSi2O6 to be very leach resistant.

  13. Evidence of asymmetric top in 130Ba

    International Nuclear Information System (INIS)

    Introduced is a new relation connecting moment of inertia, Lipas parameter and asymmetric rotor model energies and put forward much closer trend in odd even staggering of quasi γ-band. A different view point regarding generation of quasi γ-band in 130Ba have been presented

  14. Spectroscopy of Ba and Ba$^+$ deposits in solid xenon for barium tagging in nEXO

    CERN Document Server

    Mong, B; Walton, T; Chambers, C; Craycraft, A; Benitez-Medina, C; Hall, K; Fairbank, W; Albert, J B; Auty, D J; Barbeau, P S; Basque, V; Beck, D; Breidenbach, M; Brunner, T; Cao, G F; Cleveland, B; Coon, M; Daniels, T; Daugherty, S J; DeVoe, R; Didberidze, T; Dilling, J; Dolinski, M J; Dunford, M; Fabris, L; Farine, J; Feldmeier, W; Fierlinger, P; Fudenberg, D; Giroux, G; Gornea, R; Graham, K; Gratta, G; Heffner, M; Hughes, M; Jiang, X S; Johnson, T N; Johnston, S; Karelin, A; Kaufman, L J; Killick, R; Koffas, T; Kravitz, S; Krucken, R; Kuchenkov, A; Kumar, K S; Leonard, D S; Licciardi, C; Lin, Y H; Ling, J; MacLellan, R; Marino, M G; Moore, D; Odian, A; Ostrovskiy, I; Piepke, A; Pocar, A; Retiere, F; Rowson, P C; Rozo, M P; Schubert, A; Sinclair, D; Smith, E; Stekhanov, V; Tarka, M; Tolba, T; Twelker, K; Vuilleumier, J -L; Walton, J; Weber, M; Wen, L J; Wichoski, U; Yang, L; Yen, Y -R; Zhao, Y B

    2014-01-01

    Progress on a method of barium tagging for the nEXO double beta decay experiment is reported. Absorption and emission spectra for deposits of barium atoms and ions in solid xenon matrices are presented. Excitation spectra for prominent emission lines, temperature dependence and bleaching of the fluorescence reveal the existence of different matrix sites. A regular series of sharp lines observed in Ba$^+$ deposits is identified with some type of barium hydride molecule. Lower limits for the fluorescence quantum efficiency of the principal Ba emission transition are reported. Under current conditions, an image of $\\le10^4$ Ba atoms can be obtained. Prospects for imaging single Ba atoms in solid xenon are discussed.

  15. Partículas flexuosas de aspecto viral aisladas de achira (canna edulis ker.) afectada por clorosis en colombia

    OpenAIRE

    Reichel, Helena

    2010-01-01

    Observaciones al microscopio electrónico de extractos de hojas de achira (Canna edulis) afectada por una clorosis, precedente del departamento del Huila (Colombia) revelaron la presencia de partículas flexuosas de aspecto viral de aproximadamente 600 nm x 10 nm. Este es el primer reporte de partículas flexuosas de aspecto viral infectando a achira en Colombia.

  16. Syntheses and characterization of two new selenides Ba5Al2Se8 and Ba5Ga2Se8

    International Nuclear Information System (INIS)

    Graphical abstract: Display Omitted Research highlights: → Two new compounds Ba5M2Se8 (M = Al, Ga) have been synthesized for the first time. → The crystal structures contain isolated MSe4 tetrahedra separated by Ba atoms. → The measured optical band gap is 2.51(2) eV for Ba5Ga2Se8. → The Ba 5d orbitals were found to have significant contribution to the energy bands around Fermi level. - Abstract: Two new barium selenides Ba5Al2Se8 and Ba5Ga2Se8 have been synthesized by solid-state reactions. The structures of Ba5Ga2Se8 and Ba5Al2Se8 were determined by single-crystal X-ray diffraction method and the Rietveld method, respectively. The two isostructural compounds crystallize in space group Cmca of the orthorhombic system with isolated MSe4 (M = Al, Ga) tetrahedra separated by Ba atoms. The optical band gap of 2.51(2) eV for Ba5Ga2Se8 was deduced from the diffuse reflectance spectrum. Band structure calculation indicates that Ba5Ga2Se8 is a direct-gap semiconductor. The valence band maximum is dominated by Se 4p orbitals, while the Ba 5d orbitals have the largest contribution to bottom of the conduction band.

  17. Los lagartos de malpelo (colombia): aspectos sobre su ecología y amenazas

    OpenAIRE

    López-Victoria, Mateo

    2012-01-01

    Se aportan nuevos aspectos sobre la historia natural de los saurios de la Isla deMalpelo y, como complemento al Libro Rojo de reptiles de Colombia, se plantea sunivel de amenaza y clasificación según los criterios de la UICN.

  18. Legislación y atención temprana. Notas sobre aspectos sociosanitarios

    OpenAIRE

    Ponte, Jaime

    2003-01-01

    En este artículo se revisan parte de las medidas legislativas que inciden sobre la atención infantil temprana (AIT), centrándose en la esfera sociosanitaria y dejando al margen los aspectos educativos y la financiación.

  19. Aspectos metodológicos en estudios de calidad del agua

    OpenAIRE

    Bustamante Gutiérrez, Irene de

    1989-01-01

    En este trabajo se realiza una revisión de distintas metodologías seguidas en estudios de calidad y contaminación de aguas superficiales y subterráneas, comentándose distintos aspectos prácticos y sus aplicaciones.

  20. Ba and BaO on W and on Sc2O3 coated W

    International Nuclear Information System (INIS)

    Temperature-programmed desorption (TPD) and Auger electron spectroscopy (AES) are used to characterize the surface layers that form under an evaporating flux of a dispenser cathode (which is a Ba and BaO source) on a W substrate and Sc2O3-coated W substrate to simulate the surface layer of a conventional dispenser cathode and scandate cathode, respectively. The surface layers were prepared while the substrate was either at 940 deg. Cb (1272 K), a typical operating temperature, or at 1125 deg. Cb (1477 K), a typical activation temperature. Our investigation found that a partial layer of BaO formed on W, similar to the surface layer that forms on a dispenser cathode. Heating to the activation temperature causes the BaO to form a stronger bond with W. For the Sc2O3-coated W substrate, heating to the activation temperature is necessary for the inter-diffusion between the Sc2O3 and W to occur. BaO layers form a stronger bond to the inter-diffused layer than to pure W. However, the most important finding is that a stable BaO-containing compound forms and continues to accumulate under the impinging flux on the Sc2O3 and W covered substrate at 940 deg. Cb. Surface emission models describe successfully all other dispenser cathodes, but fail to explain the emission characteristics of scandate cathodes. Raju and Maloney proposed an alternate model, which requires the presence of a thick layer of semi-conducting material. Our finding suggests that it is possible to form a thick layer from simultaneous presence of BaO, Sc2O3 and W. However, further investigation is necessary to determine if the Raju and Maloney type layer is indeed present on top of scandate cathodes

  1. Ba and BaO on W and on Sc 2O 3 coated W

    Science.gov (United States)

    Shih, A.; Yater, J. E.; Hor, C.

    2005-03-01

    Temperature-programmed desorption (TPD) and Auger electron spectroscopy (AES) are used to characterize the surface layers that form under an evaporating flux of a dispenser cathode (which is a Ba and BaO source) on a W substrate and Sc 2O 3-coated W substrate to simulate the surface layer of a conventional dispenser cathode and scandate cathode, respectively. The surface layers were prepared while the substrate was either at 940 °C b (1272 K), a typical operating temperature, or at 1125 °C b (1477 K), a typical activation temperature. Our investigation found that a partial layer of BaO formed on W, similar to the surface layer that forms on a dispenser cathode. Heating to the activation temperature causes the BaO to form a stronger bond with W. For the Sc 2O 3-coated W substrate, heating to the activation temperature is necessary for the inter-diffusion between the Sc 2O 3 and W to occur. BaO layers form a stronger bond to the inter-diffused layer than to pure W. However, the most important finding is that a stable BaO-containing compound forms and continues to accumulate under the impinging flux on the Sc 2O 3 and W covered substrate at 940 °C b. Surface emission models describe successfully all other dispenser cathodes, but fail to explain the emission characteristics of scandate cathodes. Raju and Maloney proposed an alternate model, which requires the presence of a thick layer of semi-conducting material. Our finding suggests that it is possible to form a thick layer from simultaneous presence of BaO, Sc 2O 3 and W. However, further investigation is necessary to determine if the Raju and Maloney type layer is indeed present on top of scandate cathodes.

  2. AMiBA: Broadband Heterodyne CMB Interferometry

    CERN Document Server

    Chen, Ming-Tang; Hwang, Yuh-Jing; Jiang, Homin; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao; Chang, Su-Wei; Chiueh, Tzi-Dar; Chu, Tah-Hsiung; Han, Chih-Chiang; Huang, Yau-De; Kesteven, Michael; Kubo, Derek; Martin-Cocher, Pierre; Oshiro, Peter; Raffin, Philippe; Wei, Tashun; Wang, Huei; Wilson, Warwick; Ho, Paul T P; Huang, Chih-Wei; Koch, Patrick; Liao, Yu-Wei; Lin, Kai-Yang; Liu, Guo-Chin; Molnar, Sandor M; Nishioka, Hiroaki; Umetsu, Keiichi; Wang, Fu-Cheng; Wu, Jiun-Huei Proty

    2009-01-01

    The Y. T. Lee Array for Microwave Background (AMiBA) has reported the first science results on the detection of galaxy clusters via the Sunyaev Zel'dovich effect. The science objectives required small reflectors in order to sample large scale structures (20') while interferometry provided modest resolutions (2'). With these constraints, we designed for the best sensitivity by utilizing the maximum possible continuum bandwidth matched to the atmospheric window at 86-102GHz, with dual polarizations. A novel wide-band analog correlator was designed that is easily expandable for more interferometer elements. MMIC technology was used throughout as much as possible in order to miniaturize the components and to enhance mass production. These designs will find application in other upcoming astronomy projects. AMiBA is now in operations since 2006, and we are in the process to expand the array from 7 to 13 elements.

  3. The AMiBA Hexapod Telescope Mount

    Science.gov (United States)

    Koch, Patrick M.; Kesteven, Michael; Nishioka, Hiroaki; Jiang, Homin; Lin, Kai-Yang; Umetsu, Keiichi; Huang, Yau-De; Raffin, Philippe; Chen, Ke-Jung; Ibañez-Romano, Fabiola; Chereau, Guillaume; Huang, Chih-Wei Locutus; Chen, Ming-Tang; Ho, Paul T. P.; Pausch, Konrad; Willmeroth, Klaus; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao; Chang, Su-Wei; Han, Chih-Chiang; Kubo, Derek; Li, Chao-Te; Liao, Yu-Wei; Liu, Guo-Chin; Martin-Cocher, Pierre; Oshiro, Peter; Wang, Fu-Cheng; Wei, Ta-Shun; Wu, Jiun-Huei Proty; Birkinshaw, Mark; Chiueh, Tzihong; Lancaster, Katy; Lo, Kwok Yung; Martin, Robert N.; Molnar, Sandor M.; Patt, Ferdinand; Romeo, Bob

    2009-04-01

    The Array for Microwave Background Anisotropy (AMiBA) is the largest hexapod astronomical telescope in current operation. We present a description of this novel hexapod mount with its main mechanical components—the support cone, universal joints, jack screws, and platform—and outline the control system with the pointing model and the operating modes that are supported. The AMiBA hexapod mount performance is verified based on optical pointing tests and platform photogrammetry measurements. The photogrammetry results show that the deformations in the inner part of the platform are less than 120 μm rms. This is negligible for optical pointing corrections, radio alignment, and radio phase errors for the currently operational seven-element compact configuration. The optical pointing error in azimuth and elevation is successively reduced by a series of corrections to about 0farcm 4 rms which meets our goal for the seven-element target specifications.

  4. The AMiBA Hexapod Telescope Mount

    CERN Document Server

    Koch, Patrick M; Nishioka, Hiroaki; Jiang, Homin; Lin, Kai-Yang; Umetsu, Keiichi; Huang, Yau-De; Raffin, Philippe; Chen, Ke-Jung; Ibanez-Romano, Fabiola; Chereau, Guillaume; Chen, Ming-Tang; Ho, Paul T P; Pausch, Konrad; Willmeroth, Klaus; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao; Chang, Su-Wei; Han, Chih-Chiang; Kubo, Derek; Li, Chao-Te; Liu, Guo-Chin; Martin-Cocher, Pierre; Oshiro, Peter; Wei, Ta-Shun; Birkinshaw, Mark; Lancaster, Katy; Lo, Kwok Yung; Martin, Robert N; Molnar, Sandor M; Patt, Ferdinand; Romeo, Bob

    2009-01-01

    AMiBA is the largest hexapod astronomical telescope in current operation. We present a description of this novel hexapod mount with its main mechanical components -- the support cone, universal joints, jack screws, and platform -- and outline the control system with the pointing model and the operating modes that are supported. The AMiBA hexapod mount performance is verified based on optical pointing tests and platform photogrammetry measurements. The photogrammetry results show that the deformations in the inner part of the platform are less than 120 micron rms. This is negligible for optical pointing corrections, radio alignment and radio phase errors for the currently operational 7-element compact configuration. The optical pointing error in azimuth and elevation is successively reduced by a series of corrections to about 0.4 arcmin rms which meets our goal for the 7-element target specifications.

  5. Hadron Physics in BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Lafferty, G.D.; /Manchester U.

    2005-08-29

    Some recent results in hadron physics from the BaBar experiment are discussed. In particular, the observation of two new charmed states, the D*{sub sJ}{sup +}(2317) and the D*{sub sJ}{sup +}(2457), is described, and results are presented on the first measurement of the rare decay mode of the B meson, B{sup 0} {pi}{sup 0}{pi}{sup 0}.

  6. AMiBA: Broadband Heterodyne CMB Interferometry

    OpenAIRE

    Chen, Ming-Tang; Li, Chao-Te; Hwang, Yuh-Jing; Jiang, Homin; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao; Chang, Su-Wei; Chiueh, Tzi-Dar; Chu, Tah-Hsiung; Han, Chih-Chiang; Huang, Yau-De; Kesteven, Michael; Kubo, Derek; Martin-Cocher, Pierre

    2009-01-01

    The Y. T. Lee Array for Microwave Background (AMiBA) has reported the first science results on the detection of galaxy clusters via the Sunyaev Zel'dovich effect. The science objectives required small reflectors in order to sample large scale structures (20') while interferometry provided modest resolutions (2'). With these constraints, we designed for the best sensitivity by utilizing the maximum possible continuum bandwidth matched to the atmospheric window at 86-102GHz, with dual polarizat...

  7. Tests of AMiBA Data Integrity

    OpenAIRE

    Nishioka, Hiroaki; Wang, Fu-Cheng; Wu, Jiun-Huei Proty; Ho, Paul T. P.; Huang, Chih-Wei Locutus; Koch, Patrick M.; Liao, Yu-Wei; Lin, Kai-Yang; Liu, Guo-Chin; Molnar, Sandor M.; Umetsu, Keiichi; Birkinshaw, Mark; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao

    2008-01-01

    We describe methods used to validate data from the Y.T. Lee Array for Microwave Background Anisotropy (AMiBA), an interferometric array designed to measure the Sunyaev-Zel'dovich effect and the anisotropy of the Cosmic Microwave Background (CMB). We perform several statistical tests on data from pointed galaxy cluster observations taken in 2007 and noise data from long-term blank sky observations and measurements with the feeds covered by the absorbers. We apply power spectrum analysis, cross...

  8. Experimental determination of the partition coefficient for Ba in Neogloboquadrina dutertrei suggests calcification occurs in a Ba-enriched microenvironment

    Science.gov (United States)

    Fehrenbacher, J. S.; Russell, A. D.; Davis, C. V.; Spero, H. J.; Chu, E.

    2015-12-01

    The Ba/Ca ratio in several spinose planktic foraminifer species varies as a function of the Ba/Ca concentration of seawater and is not affected by other parameters such as the seawater salinity, temperature and pH (Honisch et al., 2011). Since seawater Ba concentration is linearly related to Ba in nearshore environments, Ba/Ca ratios in spinose species shows promise as an indicator of past changes in monsoon strength and river runoff (e. g. Weldeab et al. 2007). In contrast, the non-spinose foraminifers often have intrashell variability in Ba/Ca, with Ba/Ca ratios much higher than expected for the range of Ba concentrations observed in the ocean. Furthermore, the Ba/Ca ratio can vary by over a factor of 10 within a single specimen. This suggests either 1) the partition coefficient for Ba in non-spinose species differs from that determined for spinose species, or 2) non-spinose species calcify in a micro-environment that is enriched in Ba. We conducted experiments on live specimens to determine the partition coefficient for Ba in the non-spinose foraminifer N. dutertrei. Specimens were collected via plankton net from the Southern California Bight and cultured at the Wrigley Marine Science Center, Santa Catalina Island during the summer of 2013-2015. We use isotopically labeled seawater (87Sr) to identify discrete portions of calcite that grew in culture. We use laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) for trace element analyses and to identify ocean grown vs. culture grown calcite. We show that the partition coefficient is similar to the spinose species: N. dutertrei incorporates Ba as a function of seawater chemistry. We conclude from these observations that N. dutertrei forms its calcite from fluids enriched in Ba, and hypothesize that this process occurs via attachment to organic-rich particles such as marine snow.

  9. New Spectroscopy at BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Mazzoni, M.A.; /INFN, Rome

    2007-04-18

    The Babar experiment at the SLAC B factory has accumulated a high luminosity that offers the possibility of systematic studies of quarkonium spectroscopy and of investigating rare new phenomena. Recent results in this field are presented. In recent times spectroscopy has become exciting again, after the discovery of new states that are not easily explained by conventional models. States such as the X(3872) and the Y(4260) could be new excited charmonium states, but require precise measurements for positive identification. The BaBar experiment [1] is installed at the asymmetric storage ring PEP-II. 90% of the data accumulated by BaBar are taken at the Y(4S) (10.58 GeV) and 10% just below (10.54 GeV). The BaBar detector includes a 5-layer, double-sided silicon vertex tracker and a 40-layer drift chamber in a 1.5 T solenoidal magnetic field, which detect charged particles and measures their momenta and ionization energy losses. Photons, electrons, and neutral hadrons are detected with a CsI(Tl)-crystal electromagnetic calorimeter. An internally reflecting ring-imaging Cherenkov is also used for particle id. Penetrating muon and neutral hadrons are identified by an array of resistive-plate chambers embedded in the steel of the flux return. The detector allows good track and vertex resolution, good particle id and good photon detection so it is especially suited for spectroscopy studies.

  10. The BaBar Data Acquisition System

    CERN Document Server

    Scott, I; Grosso, P; Huffer, M E; O'Grady, C; Russell, J J

    1999-01-01

    The BaBar experiment at the Stanford Linear Accelerator Center is designed to perform a search for CP violation by ana-lyzing the decays of a very large sample of B and B(Bar) mesons produced at the high luminosity PEP-II accelerator. The data acquisition system must cope with a sustained high event rate, while supporting real time feature extraction and data compression with minimal dead time. The BaBar data acquisition system is based around a common VME interface to the electronics read-out of the separate detec-tor subsystems. Data from the front end electronics is read into commercial VME processors via a custom "Personality Card" and PCI interface. The commercial CPUs run the Tornado operating system to provide a platform for detector subsystem code to perform the necessary data processing. The data is read out via a non-blocking network switch to a farm of commercial UNIX processors. The current implementation of the BaBar data acquisition sys-tem has been shown to sustain a Level 1 trigger rate of 1.3...

  11. Valoración de Aspectos Cualitativos del Cuidado de Enfermería en Pacientes Hospitalizados

    OpenAIRE

    Claudia Consuelo Torres Contreras

    2010-01-01

    Introducción: Se presenta la valoración de aspectos cualitativos del cuidado de enfermería desde la percepción de los pacientes hospitalizados en una Institución prestadora de salud, de IV nivel. Objetivo: Describir aspectos cualitativos importantes del cuidado de enfermería a través de un análisis comparativo de los comentarios realizados por pacientes hospitalizados. Materiales y Métodos: El presente es un estudio descriptivo que reporta aspectos cualitativos manifestados por los pacientes ...

  12. Growth and characterization of acentric BaHf(BO3)2 and BaZr(BO3)2

    International Nuclear Information System (INIS)

    Growth, single crystal X-ray diffraction, polarized Raman and infrared (IR) studies of BaHf(BO3)2 are presented. Raman and IR spectra of polycrystalline BaZr(BO3)2 are also reported to facilitate assignment of modes. BaHf(BO3)2 borate crystallizes in trigonal system, space group R3c, with lattice parameters: a=5.1540(4) Å, c=33.901(3) Å. It accommodates dolomite-like structure doubled in the c direction, which is built of alternating layers of HfO6 octahedra and BaO6 distorted trigonal prisms that are connected through borate groups. The obtained structural as well as spectroscopic data show that BaHf(BO3)2 is isostructural with BaZr(BO3)2 and the deviations from centrosymmetry is small. - Graphical abstract: Arrangement of BO3 groups in BaHf(BO3)2 along the c direction in one unit cell. Dark and light blue denote different borate groups. - Highlights: • BaHf(BO3)2 single crystals were grown. • X-ray diffraction showed that this borate crystallizes in the acentric R3c structure. • Raman and IR spectra were measured for BaHf(BO3)2 and BaZr(BO3)2, respectively. • Assignment of modes is proposed

  13. Aspectos ultra-estruturais da forma epimastigota do Trypanosoma cruzi em meio LIT

    Directory of Open Access Journals (Sweden)

    Wanderley de Souza

    1975-06-01

    Full Text Available E feito um estudo da ultra-estrutura da forma epismastigota do Trypanosoma cruzi mantida em meio de cultivo acelular. O núcleo das formas em divisão apresenta um aspecto homogêneo. Microtúbulos intranucleares são observados durante a divisão. No entanto, a membrana nuclear permanece íntegra. O citoplasma apresenta-se com vacúolos de dimensões e aspectos variados. Com o método do ácido periódico-tiosemicarbazida-proteinato de prata, polissacaríáeos e/ou glicoproteínas foram localizados na membrana celular e na membrana que delimita certos vacúolos citoplasmáticos.

  14. Aspectos Psicológicos y Emocionales durante la gestación y el puerperio

    OpenAIRE

    Sastre Miras, Irene

    2015-01-01

    Decidí tratar el tema de los aspectos psicológicos y emocionales durante la gestación y el puerperio porque durante mi rotación por la Unidad de Hospitalización de Obstetricia del HURH realicé una valoración basada en la observación, mediante la que percibí que la forma en que las mujeres experimentaban la maternidad, no era siempre positiva y no recibían una atención especial, puesto que la prioridad de actuación está referida a los aspectos físicos. Para llevar a cabo mi TFG realicé una ...

  15. Aspectos da tomografia computadorizada craniana na neurocisticercose na infância

    Directory of Open Access Journals (Sweden)

    Marilisa M. Guerreiro

    1989-06-01

    Full Text Available Os autores relatam aspectos tomográficos da neurocisticercose na infância a propósito da análise de 27 exames em 18 pacientes, que foram distribuídos em três grupos segundo o quadru clínico e os achados tomográficos. O grupo 1 foi caracterizado basicamente por epilepsias e calcificações. O grupo 2 caracterizou-se por hipertensão intracraniana e diversos aspectos tomográficos: edema, cistos e nódulos em três pacientes; hidrocefalia e calcificações em dois pacientes e normal em um paciente. O grupo 3 consistiu clinicamente de epilepsia e cefaléia, com vários padrões tomográficos. Os resultados são discutidos à luz da literatura disponível.

  16. ASPECTOS NORTEADORES NA ORIENTAÇÃO DE MONOGRAFIA A DISTÂNCIA

    Directory of Open Access Journals (Sweden)

    monica seixas mello

    2012-12-01

    Full Text Available O objetivo do presente estudo é analisar os aspectos norteadores na orientação de monografia na modalidade a distância a partir de relato de experiência em curso de pó-graduação Lato Sensu em Gestão Pública., constatando-se que na orientação a distância em ambientes virtuais de aprendizagem as interações entre professor e aluno observam os seguintes aspectos: pedagógico, gerencial, social e técnico Palavras-chaves: educação, distância, orientação, monografia, pos-graduação.

  17. High spin structure in 130,131Ba

    International Nuclear Information System (INIS)

    High spin states of 130,131Ba have been investigated via fusion evaporation reactions 122Sn(13C,4n)131Ba and 122Sn(13C, 5n)130Ba at Ebeam=65 MeV. The level schemes of 130,131Ba have been extended by placing several new γ transitions. A few interband transitions connecting two negative-parity bands, which are the experimental fingerprints of signature partners, have been established in 130Ba. Spin and parity of a side band have been assigned in 131Ba and this dipole band is proposed to have a three-quasiparticle configuration, νh11/2 x πh11/2 x πg7/2. The observed band structures and nuclear shape evolution as a function of the angular momentum have been discussed in the light of Total-Routhian-Surface calculations. (orig.)

  18. El fracaso académico en la universidad: Aspectos motlvacionales e interesesprofesionales

    OpenAIRE

    Manuel Mar\\u00EDn S\\u00E1nchez; Eduardo Infante Rejano; Yolanda Troyano Rodr\\u00EDguez

    2000-01-01

    Un total de 103 alumnos con una edad promedio de 21 años fracasado en sus estudios universitarios, se evaluaron a través de una serie de cuestionarios, pruebas objetivas de inteligencia y personalidad, y entrevistas individuales. La investigación pretende describir la relación entre aspectos actitudinales (motivaciones e intereses profesionales) y fracaso académico, independientemente del nivel de inteligencia. Asimismo, se elaboró el perfil vocacional de los alumnos fracasa...

  19. Algunos aspectos de la ciudad islámica: un recorrido urbano desde Oriente a Granada

    OpenAIRE

    Orihuela, Antonio

    2006-01-01

    Se presentan aspectos generales del urbanismo islámico y se describen algunas de las teorías recientes que explican la evolución de la ciudad medieval en el occidente islámico. A continuación se señalan algunas reminiscencias del derecho malikí en las antiguas Ordenanzas municipales de Toledo y de Granada (1552).

  20. Tratamiento de residuales anaeróbico. Aspectos constructivos y de diseño

    OpenAIRE

    Yaniris Lorenzo; Lixis Rojas

    2010-01-01

    Se analizan los aspectos constructivos y de diseño a tener en cuenta para la puesta en marcha de un reactor anaerobio. Para ello existen dos métodos, uno empírico y otro que se basa en criterios cinéticos. Los dos se describen en el trabajo, en conjunción con las ecuaciones necesarias a aplicar para cada caso.

  1. Tratamiento de residuales anaeróbico. Aspectos constructivos y de diseño

    Directory of Open Access Journals (Sweden)

    Yaniris Lorenzo

    2010-01-01

    Full Text Available Se analizan los aspectos constructivos y de diseño a tener en cuenta para la puesta en marcha de un reactor anaerobio. Para ello existen dos métodos, uno empírico y otro que se basa en criterios cinéticos. Los dos se describen en el trabajo, en conjunción con las ecuaciones necesarias a aplicar para cada caso.

  2. El fracaso académico en la universidad: Aspectos motlvacionales e interesesprofesionales

    Directory of Open Access Journals (Sweden)

    Manuel Mar\\u00EDn S\\u00E1nchez

    2000-01-01

    Full Text Available Un total de 103 alumnos con una edad promedio de 21 años fracasado en sus estudios universitarios, se evaluaron a través de una serie de cuestionarios, pruebas objetivas de inteligencia y personalidad, y entrevistas individuales. La investigación pretende describir la relación entre aspectos actitudinales (motivaciones e intereses profesionales y fracaso académico, independientemente del nivel de inteligencia. Asimismo, se elaboró el perfil vocacional de los alumnos fracasados y se determinó su congruencia con respecto a la elección de estudios universitarios. Los resultados indican que los aspectos motivacionales y actitudinales poseen un potencial predictor del fracaso académico igualo mayor que los aspectos cognoscitivos o intelectuales. Los alumnos mostraron claros síntomas de indefensión aprendida, baja motivación intrínseca y pobres tendencias a la realización personal (aprendizajes y/o laboral. Por otra parte, los resultados animan a considerar la importancia de la compatibilidad entre vocación y elección universitaria.

  3. Aspectos valorizados por porfissionais de enfermagem na higiene pessoal e na higiene corporal do paciente

    Directory of Open Access Journals (Sweden)

    Elóide André Oliveira

    2003-10-01

    Full Text Available Survey descritivo, com o qual se objetivou identificar que aspectos da higiene corporal são valorizados pelos componentes da equipe de enfermagem, na higiene corporal pessoal e na higiene corporal do paciente. A pesquisa foi desenvolvida em oito instituições públicas de saúde e a amostra foi composta por 126 profissionais de enfermagem, correspondendo a 12,8% do total de 986 componentes das equipes de enfermagem destas instituições. Na higiene corporal pessoal, chamou a atenção o fato de que os cuidados com as unhas e com os cabelos tenham suplantado, no número de citações dos profissionais de enfermagem, aspectos básicos como o cuidado com as mãos. Na higiene corporal do paciente, o banho foi o aspecto considerado mais importante pelas três categorias profissionais; a higiene oral, pelas(os enfermeiras(os e auxiliares de enfermagem; e as unhas, pelas(os enfermeiras(os e técnicas(os de enfermagem.

  4. Mapping RFLP Loci in Maize Using B-a Translocations

    OpenAIRE

    Weber, D.; Helentjaris, T

    1989-01-01

    Plants hypoploid for specific segments of each of the maize (Zea mays L.) chromosomes were generated using 24 different B-A translocations. Plants carrying each of the B-A translocations were crossed as male parents to inbreds, and sibling progeny hypoploid or not hypoploid for specific chromosomal segments were recovered. Genomic DNAs from the parents, hypoploid progeny, and nonhypoploid (euploid or hyperploid) progeny for each of these B-A translocations were digested with restriction enzym...

  5. Ba2TeO: A new layered oxytelluride

    International Nuclear Information System (INIS)

    Single crystals of the new semiconducting oxytelluride phase, Ba2TeO, were synthesized from barium oxide powder and elemental tellurium in a molten barium metal flux. Ba2TeO crystallizes in tetragonal symmetry with space group P4/nmm (#129), a=5.0337(1) Å, c=9.9437(4) Å, Z=2. The crystals were characterized by single crystal x-ray diffraction, heat capacity and optical measurements. The optical measurements along with electronic band structure calculations indicate semiconductor behavior with a band gap of 2.93 eV. Resistivity measurements show that Ba2TeO is highly insulating. - Graphical abstract: Starting from a simple stacking of rocksalt layers, the final structure of Ba2TeO can be obtained by accommodation of structural strain via atom displacements. Density of states calculations and optical absorbance measurements show that Ba2TeO has a band gap of 2.93 eV, indicative of semiconductor behavior. - Highlights: • Single crystal synthesis of a new layered oxytelluride, Ba2TeO. • The structure features inverse PbO-type BaO layers and NaCl-type BaTe layers. • Optical absorbance show Ba2TeO to be a semiconductor with a 2.93 eV gap. • Density of states indicate a small hybridization between Te 5p and Ba 5d states. • The BaTe (BaO) layers dominate the heat capacity at low (high) temperatures

  6. 120-K Tl-Ca-Ba-Cu-O superconducting system

    International Nuclear Information System (INIS)

    The authors have discovered a reproducible and stable bulk superconductivity in the Tl-Ca-Ba-Cu-O system. The Tl-Ca-Ba-Cu-O superconductors can be easily prepared, and have highest Tc (125 K) and high critical current. Some Tl-Ca-Ba-Cu-O samples show an unusual phenomenon of coexistence of diamagnetism and ferromagnetic like behavior. The Tl-based system is rich in new superconducting structures, and has provided insight into mechanisms of high Tc oxide superconductivity

  7. DongBa Dance--Mixture of cultures

    Institute of Scientific and Technical Information of China (English)

    赵春娟

    2014-01-01

    DongBa Dance is a kind of ancient dance that created by Naxi people living in the Southwest of China and recorded by their own hieroglyph.During the development, it adopted parts of Tibetan, Indian and Egyptian cultures.So, as the mixture of cultures, DongBa Dance is marching into the world and causing a great attention.The ancient DongBa Dance will get a new life in the world.

  8. DongBa Dance——Mixture of cultures

    Institute of Scientific and Technical Information of China (English)

    赵春娟

    2014-01-01

    Dong Ba Dance is a kind of ancient dance that created by Naxi people living in the Southwest of China and recorded by their own hieroglyph.During the development, it adopted parts of Tibetan, Indian and Egyptian cultures.So, as the mixture of cultures, Dong Ba Dance is marching into the world and causing a great attention.The ancient Dong Ba Dance will get a new life in the world.

  9. A small volume thermodynamic system for B/A measurement.

    Science.gov (United States)

    Zhang, J; Dunn, F

    1991-01-01

    A thermodynamic method capable of determining the B/A value of 4-ml sample volumes is described. The method involves a procedure in which the static pressure of the sample is altered in a short period of time, to approximate an adiabatic process, during which the ultrasonic velocity is measured. The velocity change so determined is used to calculate the B/A value. The B/A measurement error is less than 0.7%. PMID:1825834

  10. Comida de rua: um estudo crítico e multirreferencial em Salvador, BA − Brasil / Street food: A critical and multifaceted study in Salvador, BA, Brazil

    Directory of Open Access Journals (Sweden)

    Cristian Oliveira Benevides Sanches Leal

    2014-11-01

    Full Text Available O objetivo deste artigo é descrever e analisar a situação da comida de rua em Salvador, BA – Brasil, compreendendo suas especificidades em diferentes contextos da cidade. Trata-se de estudo de caso único, cujas técnicas de coleta de dados foram a observação de cunho etnográfico, entrevistas semiestruturadas, uso de imagens e leitura de jornal local ao logo de um ano em três aspectos relacionados ao segmento: riscos relacionados aos alimentos e ao ambiente onde são comercializados e riscos relacionados aos trabalhadores. Os resultados indicaram grandes fragilidades relacionadas às categorias analisadas: diversidade de alimentos comercializados, mal manipulados e conservados; ambiente urbano insalubre, sem pontos de água, coleta de lixo inadequada, drenagem precária de águas e poluição atmosférica pelo elevado número de veículos; trabalhadores sem qualificação, sem uniformização adequada e submetidos a riscos sociais e ambientais constantes. Evidencia-se a necessidade da adoção de novas formas de gerenciamento de riscos para o segmento pela Vigilância sanitária, numa perspectiva intersetorial e solidária, dada a complexidade do objeto e a importância socioeconômica, cultural e nutricional da comida de rua. Constata-se a dificuldade para a VISA controlar os riscos relacionados à comida de rua atuando de forma apenas fiscalizatória, especialmente em grandes centros urbanos, como no caso de Salvador, BA. ==================================== This study aims to describe and analyze the present situation of street food in Salvador, BA, Brazil, understanding its specificities in different urban contexts. In this single case study, the data collection techniques included ethnographic observation, semi-structured interviews, use of images, and reading a local newspaper for one year focusing on three aspects related to the segment that include risks related to food, to the environment in which it is sold, and to workers

  11. 120-K Tl-Ca-Ba-Cu-O bulk superconductors

    International Nuclear Information System (INIS)

    The authors have discovered reproducible and stable bulk superconductivity in the Tl-Ca-Ba-Cu-O system above 130 K, with zero resistance above 120 K. Magnetic and electronic transport properties including thermoelectric power of the new superconductors are presented. The Tl-Ca- Ba-Cu-O system contains the 125-K 2223 (Tl:Ca:Ba:Cu) phase and the 105-K 2122 phase, while the Ca-free Tl-Ba-Cu-O system consists of the 80-K 2021 phase, suggesting that the addition of each Cu and Ca layer increases the transition temperature by about 20 K

  12. Synthesis and characterization of Ba/MCM-41

    OpenAIRE

    Kaya, Emine; OKTAR, Nuray; KARAKAŞ, Gürkan

    2010-01-01

    Mesoporous Ba/MCM-41 type materials (Ba/MCM-41) with high Ba/Si molar ratios between 0.025 and 0.1 were synthesized by direct hydrothermal synthesis. The samples were characterized by XRD, nitrogen adsorption, TGA-DTA, FTIR, SEM-EDS, and TEM techniques. BET surface areas of samples with various Ba loadings were found between 722 and 931 m2/g with 28 Å average pore size, which is consistent with the pore size of 30 Å for pure MCM-41 samples synthesized by the same procedure. The crys...

  13. Hysteretic electrical transport in BaTiO3/Ba1−xSrxTiO3/Ge heterostructures

    International Nuclear Information System (INIS)

    We present electrical transport measurements of heterostructures comprised of BaTiO3 and Ba1−xSrxTiO3 epitaxially grown on Ge. Sr alloying imparts compressive strain to the BaTiO3, which enables the thermal expansion mismatch between BaTiO3 and Ge to be overcome to achieve c-axis oriented growth. The conduction bands of BaTiO3 and Ba1−xSrxTiO3 are nearly aligned with the conduction band of Ge, which facilitates electron transport. Electrical transport measurements through the dielectric stack exhibit rectifying behavior and hysteresis, where the latter is consistent with ferroelectric switching

  14. Growth and characterization of acentric BaHf(BO3)2 and BaZr(BO3)2

    Science.gov (United States)

    Mączka, Mirosław; Szymborska-Małek, Katarzyna; Gągor, Anna; Majchrowski, Andrzej

    2015-05-01

    Growth, single crystal X-ray diffraction, polarized Raman and infrared (IR) studies of BaHf(BO3)2 are presented. Raman and IR spectra of polycrystalline BaZr(BO3)2 are also reported to facilitate assignment of modes. BaHf(BO3)2 borate crystallizes in trigonal system, space group R3c, with lattice parameters: a=5.1540(4) Å, c=33.901(3) Å. It accommodates dolomite-like structure doubled in the c direction, which is built of alternating layers of HfO6 octahedra and BaO6 distorted trigonal prisms that are connected through borate groups. The obtained structural as well as spectroscopic data show that BaHf(BO3)2 is isostructural with BaZr(BO3)2 and the deviations from centrosymmetry is small.

  15. Aspectos de seguridad social contenidos en la Ley No. 16.320 de Rendición de Cuentas

    Directory of Open Access Journals (Sweden)

    Carlos Pittamiglio Borges

    2015-10-01

    Full Text Available Contnido: El empleo.Organos creados: Dirección Nacional de Empleo. Junta Nacional de Empleo. Fondo de Reconversión Laboral. Consideraciones generales sobre el empleo. Aspectos relativos a la contingencia de enfermedad común. El decreto reglamentario. Consideraciones generales sobre los aspectos vinculados al segurosocial de enfermedad.Comentarios a la reforma del régimen jubilatorio

  16. Co2FeAl based magnetic tunnel junctions with BaO and MgO/BaO barriers

    Directory of Open Access Journals (Sweden)

    J. Rogge

    2015-07-01

    Full Text Available We succeed to integrate BaO as a tunneling barrier into Co2FeAl based magnetic tunnel junctions (MTJs. By means of Auger electron spectroscopy it could be proven that the applied annealing temperatures during BaO deposition and afterwards do not cause any diffusion of Ba neither into the lower Heusler compound lead nor into the upper Fe counter electrode. Nevertheless, a negative tunnel magnetoresistance (TMR ratio of -10% is found for Co2FeAl (24 nm / BaO (5 nm / Fe (7 nm MTJs, which can be attributed to the preparation procedure and can be explained by the formation of Co- and Fe-oxides at the interfaces between the Heusler and the crystalline BaO barrier by comparing with theory. Although an amorphous structure of the BaO barrier seems to be confirmed by high-resolution transmission electron microscopy (TEM, it cannot entirely be ruled out that this is an artifact of TEM sample preparation due to the sensitivity of BaO to moisture. By replacing the BaO tunneling barrier with an MgO/BaO double layer barrier, the electric stability could effectively be increased by a factor of five. The resulting TMR effect is found to be about +20% at room temperature, although a fully antiparallel state has not been realized.

  17. Co2FeAl based magnetic tunnel junctions with BaO and MgO/BaO barriers

    Science.gov (United States)

    Rogge, J.; Hetaba, W.; Schmalhorst, J.; Bouchikhaoui, H.; Stender, P.; Baither, D.; Schmitz, G.; Hütten, A.

    2015-07-01

    We succeed to integrate BaO as a tunneling barrier into Co2FeAl based magnetic tunnel junctions (MTJs). By means of Auger electron spectroscopy it could be proven that the applied annealing temperatures during BaO deposition and afterwards do not cause any diffusion of Ba neither into the lower Heusler compound lead nor into the upper Fe counter electrode. Nevertheless, a negative tunnel magnetoresistance (TMR) ratio of -10% is found for Co2FeAl (24 nm) / BaO (5 nm) / Fe (7 nm) MTJs, which can be attributed to the preparation procedure and can be explained by the formation of Co- and Fe-oxides at the interfaces between the Heusler and the crystalline BaO barrier by comparing with theory. Although an amorphous structure of the BaO barrier seems to be confirmed by high-resolution transmission electron microscopy (TEM), it cannot entirely be ruled out that this is an artifact of TEM sample preparation due to the sensitivity of BaO to moisture. By replacing the BaO tunneling barrier with an MgO/BaO double layer barrier, the electric stability could effectively be increased by a factor of five. The resulting TMR effect is found to be about +20% at room temperature, although a fully antiparallel state has not been realized.

  18. Effect of local environment on crossluminescence kinetics in SrF{sub 2}:Ba and CaF{sub 2}:Ba solid solutions

    Energy Technology Data Exchange (ETDEWEB)

    Terekhin, M.A. [P.N. Lebedev Physical Institute, Leninskij Prospekt 53, 119991 Moscow (Russian Federation); Makhov, V.N., E-mail: makhov@sci.lebedev.ru [P.N. Lebedev Physical Institute, Leninskij Prospekt 53, 119991 Moscow (Russian Federation); Lebedev, A.I.; Sluchinskaya, I.A. [Lomonosov Moscow State University, Moscow 119991 (Russian Federation)

    2015-10-15

    Spectral and kinetic properties of extrinsic crossluminescence (CL) in SrF{sub 2}:Ba (1%) and CaF{sub 2}:Ba (1%) are compared with those of intrinsic CL in BaF{sub 2} and are analyzed taking into account EXAFS data obtained at the Ba L{sub III} edge and results of first-principles calculations. The CL decay time was revealed to be longer in SrF{sub 2}:Ba and CaF{sub 2}:Ba compared to BaF{sub 2}. This fact contradicts the expected acceleration of luminescence decay which could result from an increased overlap of wave functions in solid solutions due to shortening of the Ba-F distance obtained in both EXAFS measurements and first-principles calculations. This discrepancy is explained by the effect of migration and subsequent non-radiative decay of the Ba (5p) core holes in BaF{sub 2} and by decreasing of the probability of optical transitions between Ba (5p) states and the valence band in SrF{sub 2}:Ba and CaF{sub 2}:Ba predicted by first-principles calculations. - Highlights: • The crossluminescence kinetics in SrF{sub 2}:Ba and CaF{sub 2}:Ba is slower than in BaF{sub 2}. • Ba{sup 2+} ions substitute for host Ca{sup 2+}(Sr{sup 2+}) ions in the on-center positions. • The nearest Ba-F distances in SrF{sub 2}:Ba and CaF{sub 2}:Ba are shorter than in BaF{sub 2}. • EXAFS data and first-principles calculations of the local structure agree well. • First-principles calculations explain slower luminescence decay in solid solutions.

  19. Structural and thermodynamic characterization of the perovskite-related BA1+yUO3+x and (BA,SR)1+yUO3+x phases

    International Nuclear Information System (INIS)

    The perovskite-type BaUO3 structure has been investigated by X-ray and neutron diffraction. The Ba/U ratio, the (Ba, Sr)/U ratio, and the oxygen stoichiometry in Ba1+yUO3+x were varied, and the integral enthalpies of formation determined by solution calorimetry. In addition, equilibrium oxygen partial pressures were measured using a reversible EMF cell. The chemical defect mechanism is discussed, and it is shown that a continuous series BaUO3-Ba1+yUO3+x-Ba3UO6 exist in which uranium vacancies are gradually filled up with barium ions, whereas uranium is oxidized via the pentavalent to the hexavalent state in Ba3UO6(=Ba2(Ba, U)O6). (orig.)

  20. Electronic Structure of Superconducting Ba6c60

    OpenAIRE

    Erwin, Steven C.; Pederson, Mark R

    1993-01-01

    We report the results of first-principles electronic-structure calculations for superconducting Ba6C60. Unlike the A3C60 superconductors, this new compound shows strong Ba-C hybridization in the valence and conduction regions, mixed covalent/ionic bonding character, partial charge transfer, and insulating zero-gap band structure.

  1. A Dubious Distinction? The BA versus the BS in Psychology

    Science.gov (United States)

    Pfund, Rory A.; Norcross, John C.; Hailstorks, Robin; Aiken, Leona S.; Stamm, Karen E.; Christidis, Peggy

    2016-01-01

    Previous studies have documented small differences between the bachelor of arts (BA) and the bachelor of science (BS) psychology degrees in their general education core requirements, particularly mathematics and science courses. But are there differences between the BA and BS degrees within the psychology curriculum? Using data from the…

  2. Octupole correlations in 143 Ba and 147 Pr

    International Nuclear Information System (INIS)

    High spin states in neutron-rich odd-Z 143,145 Ba nuclei have been investigated from the study of prompt γ-rays in the spontaneous fission of 252 Cf. Alternating parity bands are identified for the first time in 145 Ba and extended in 143 Ba. A new side band with equal, constant dynamic and kinematic moments of inertia equal to the rigid body value, as found in superdeformed bands, is discovered in 145 Ba. Enhanced E1 transitions between the negative- and positive-parity bands in these nuclei give evidence for strong octupole deformation in 143 Ba and in 145 Ba. These collective bands show competition and co-existence between symmetric and asymmetric shapes in 145 Ba. The first evidence is found for crossing M1 and E1 transitions between the s = +i and s = -i doublets in 143 Ba. Neutron-rich 147 Pr also was studied in the spontaneous fission of 252 Cf. Possible parity doublets observed in 147 Pr with N = 88 indicate that neutron-rich 59147 Pr88 nucleus exhibits strong octupole correlations like those observed in the 58146 Ce88 core. (authors)

  3. Thermoelectric properties of doped BaHfO3

    Science.gov (United States)

    Dixit, Chandra Kr.; Bhamu, K. C.; Sharma, Ramesh

    2016-05-01

    We have studied the structural stability, electronic structure, optical properties and thermoelectric properties of doped BaHfO3 by full potential linearized augmented plane wave (FP-LAPW) method. The electronic structure of BaHfO3 doped with Sr shows enhances the indirect band gaps of 3.53 eV, 3.58 eV. The charge density plots show strong ionic bonding in Ba-Hf, and ionic and covalent bonding between Hf and O. Calculations of the optical spectra, viz., the dielectric function, refractive index and extinction coefficient are performed for the energy range are calculated and analyzed. Thermoelectric properties of semi conducting are also reported first time. The doped BaHfO3 is approximately wide band gap semiconductor with the large p-type Seebeck coefficient. The power factor of BaHfO3 is increased with Sr doping, decreases because of low electrical resistivity and thermal conductivity.

  4. Radioactive contamination of BaF2 crystal scintillator

    CERN Document Server

    Polischuk, O G; Bernabei, R; Cappella, F; Caracciolo, V; Cerulli, R; Di Marco, A; Danevich, F A; Incicchitti, A; Poda, D V; Tretyak, V I

    2013-01-01

    Barium fluoride (BaF$_2$) crystal scintillators are promising detectors to search for double beta decay processes in $^{130}$Ba ($Q_{2{\\beta}}$ = 2619(3) keV) and $^{132}$Ba ($Q_{2{\\beta}}$ = 844(1) keV). The $^{130}$Ba isotope is of particular interest because of the indications on 2${\\beta}$ decay found in two geochemical experiments. The radioactive contamination of BaF$_2$ scintillation crystal with mass of 1.714 kg was measured over 113.4 hours in a low-background DAMA/R&D set-up deep underground (3600 m w.e.) at the Gran Sasso National Laboratories of INFN (LNGS, Italy). The half-life of $^{212}$Po (present in the crystal scintillator due to contamination by radium) was estimated as $T_{1/2}$ = 298.8 $\\pm$ 0.8(stat.) $\\pm$ 1.4(syst.) ns by analysis of the events pulse profiles.

  5. Bismuthates: BaBiO3 and related superconducting phases

    International Nuclear Information System (INIS)

    Highlights: • BaBiO3 has the perovskite structure, but tilting of the BiO6 octahedra destroy the ideal cubic symmetry except at temperatures above 820 K. BaBiO3 is a diamagnetic semiconductor due to a CDW, which is equivalent to a Ba2Bi3+Bi5+O6 representation. • Recent calculations and experimental results confirm that there is no significant deviation from the oxidation states of 3+ and 5+. • Superconductivity with a Tc as high as 13 K occurs for BaPb1−xBixO3 phases where the 6s band is about 25% filled, and superconductivity with a Tc as high as 34 K occurs for Ba1−xKxBiO3 phases where the 6s band is about 35% filled. • These two solid solutions can have cubic, tetragonal, or orthorhombic symmetry. • However, superconductivity has only been observed when the symmetry is tetragonal. - Abstract: BaBiO3 has the perovskite structure, but tilting of the BiO6 octahedra destroy the ideal cubic symmetry except at temperatures above 820 K. BaBiO3 is a diamagnetic semiconductor due to a charge density wave (CDW), which is equivalent to a Ba2Bi3+Bi5+O6 representation. Recent calculations and experimental results confirm that there is no significant deviation from the oxidation states of 3+ and 5+. Superconductivity with a Tc as high as 13 K occurs for BaPb1−xBixO3 phases where the 6s band is about 25% filled, and superconductivity with a Tc as high as 34 K occurs for Ba1−xKxBiO3 phases where the 6s band is about 35% filled. Structures in these two solid solutions can have cubic, tetragonal, orthorhombic, or monoclinic symmetry. However, superconductivity has only been observed when the symmetry is tetragonal

  6. Innovative methodology for the synthesis of Ba-M hexaferrite BaFe12O19 nanoparticles

    International Nuclear Information System (INIS)

    Graphical abstract: Transmission electron microscope images for the BaFe12O19. - Highlights: • BaFe12O19nanoparticles were prepared in single-phase from organometallic precursors. • BaFe12O19 possesses small size 65 nm, HC = 3695 Oe and Ms = 58 emu/g. • This method of preparation could be extended in the synthesis of other metal oxide nanoparticles. - Abstract: In this piece of work, high quality and homogeneity, barium hexaferrite (BaM) BaFe12O19 nanoparticles were prepared from organometallic precursors for the 1st time. This method is based on the formation of supramolecular crystal structure of Ba[Fe(H3NCH2CH2NH3)]Cl7·8H2O. The crystal structure, morphology and magnetic properties of BaFe12O19 at two different annealing temperatures namely 1000 °C and 1200 °C were investigated using X-ray diffraction, transmission electron microscope TEM and vibrating sample magnetometry (VSM). The results show that monophasic nanoparticles of hexaferrites were obtained. Nanoparticles of crystallite size 40–50 nm distinguished by narrow distribution and excellent homogeneity were obtained with superior magnetic properties which suggested single-domain particles of Ba-M hexaferrite

  7. Aspectos de diseño de un entorno de programación colaborativo

    Directory of Open Access Journals (Sweden)

    David Bracho

    2008-12-01

    Full Text Available ResumenLa programación colaborativa, o programación en par, es una de las áreas más estudiadas actualmente debido a su impacto en el proceso de desarrollo de software. El propósito de la presente investigación consistió en determinar los aspectos básicos de diseño que un entorno de programación colaborativo debe ofrecer a los desarrolladores. La metodología utilizada consistió en realizar un análisis documental sobre la propuesta de Lussier acerca de la programacióncolaborativa con la finalidad de determinar los aspectos de diseño, estructura e implementación de este tipo de entornos. Como resultado se obtuvo que desde el punto de vista del diseño, la comunicación entre desarrolladores, la revisión de código y la construcción del proyecto de software son los principales aspectos a considerar, y desde el punto de vista de la implementación se propone utilizar el modelo cliente - servidor y una arquitectura multiplataforma.AbstractCollaborative programming or pair programming is today one of the most studied areas, because of its impact on the software developing process. The purpose of the present investigation was to determine the basic design aspects that a collaborative programming environment must offer to developers. The methodology used was a documental review of Lussier’s work about collaborative programming, to determine the design aspects, the structure and the implementation aspects of this type of environments. As result, from the design point of view, the communication between developers, code review and the construction of software project are the basic aspects to consider, and from the implementation point of view, the use of the client - server model and a multiplatform architecture are proposed.

  8. Satisfacción con el aspecto dental general y tratamientos deseados en estudiantes universitarios

    Directory of Open Access Journals (Sweden)

    Clarisse Virginia Díaz Reissner

    2015-08-01

    Full Text Available La apariencia dental es considerada un componente de la belleza facial, que al ser restaurada por el odontólogo, podría influir con un efecto positivo en la valoración personal y la calidad de vida. El objetivo del estudio fue determinar la satisfacción general con la apariencia dental en estudiantes de las carreras de Artes Visuales y Diseño de Indumentaria del Instituto Superior de Arte de la Facultad de Arquitectura Diseño y Arte de la Universidad Nacional de Asunción, matriculados en el 2014. Se aplicó un cuestionario que contenía preguntas sobre datos demográficos, satisfacción con el aspecto dental general y con diversos aspectos dentales, así como también sobre el tratamiento estético deseado. La muestra quedó conformada por 108 estudiantes, que corresponde al 49,1% de la población. Se observó que el 48,2% se encontraba insatisfecho con el aspecto general de sus dientes, siendo los tratamientos de elección: blanqueamiento (63,9% y ortodoncia (47,2%. Los factores predisponentes a la insatisfacción fueron residir en Gran Asunción e interior del país y percibir sus dientes como desalineados. Por otro lado, favoreció la satisfacción el haberse sentirse a gusto con el color de sus dientes.

  9. Aspectos implicados en el talento y en la práctica de un instrumento musical

    OpenAIRE

    Iris Xóchitl Galicia Moyeda

    2007-01-01

    En este trabajo se aborda la definición de talento, así como diferentes modelos que se han propuesto para entenderlo. Posteriormente se plantea el uso de dichos modelos en el campo de la música, tocando aspectos centrales como la posesión del oído absoluto y la edad en la que deben iniciarse los estudios musicales. Finalmente se argumenta la necesidad de un estudio dirigido profesionalmente por un equipo interdisciplinario en el cual se contemplen no sólo las habilidades musicales del estudia...

  10. Aspectos psicossociais do trabalho e transtornos mentais comuns em pilotos civis

    OpenAIRE

    Denise Feijó; Volney de Magalhães Câmara; Ronir Raggio Luiz

    2014-01-01

    O objetivo foi investigar a associação entre aspectos psicossociais do trabalho e prevalência de transtornos mentais comuns (TMC) em pilotos da aviação civil brasileira. Estudo transversal quantitativo utilizando os instrumentos de autopreenchimento Job Content Questionnaire (JCQ) e Self-Reporting Questionnaire (SRQ-20). Foram avaliados 778 pilotos. No modelo de regressão logística múltipla se observa forte associação entre alta exigência e prevalência de TMC, quando comparada com baixa exigê...

  11. Gestión del conocimiento en PYME's: Qué aspectos cuentan?

    OpenAIRE

    Pëdro Sáenz Muñoz

    2008-01-01

    El conocimiento es uno de los intangibles, quizá el más importante, sobre el que descansa la fuente de competitividad de las organizaciones en el siglo XXI. La revisión bibliográfica realizada con el objetivo de verificar la importancia que este elemento tiene para las Pymes y su concomitancia con otros aspectos organizacionales que pueden incidir en su adecuada gestión, permitieron constatar que: elementos de la propia gestión del conocimiento (las formas de adquirirlo, almacenarlo, transmit...

  12. La dispepsia funcional: Aspectos biopsicosociales, evaluación y terapia psicológica

    OpenAIRE

    Stefano Vinaccia Alpi; Bonifacio Sandín; Sergio Tobón; Ariel César Núñez Rojas

    2008-01-01

    Se abordan los aspectos conceptuales del trastorno gastrointestinal Dispepsia funcional (DP), en lo que se refiere a su definición, prevalencia, clasificación y diagnóstico.; las causas y consecuencias de la DF desde una perspectiva biopsicosocial (variables socioeconómicas, demandas psicosociales, evaluación cognitiva y estrategias de afrontamiento, personalidad y comportamiento, mecanismos psicobiológicos, calidad de vida, tratamiento y evolución); la evaluación psicológica de la DF desde ...

  13. Aspectos críticos numa empresa familiar : estudo de um caso

    OpenAIRE

    Coelho, António

    2002-01-01

    Este trabalho procura analisar os aspectos críticos na evolução de uma empresa familiar do sub-sector das confecções, desde a sua constituição até à actualidade. Procura ainda contribuir de alguma forma para o entendimento do espírito empresarial, relação família-empresa, cultura, profissionalização, sucessão e gestão estratégica na empresa familiar.

  14. Medicina del niño: aspectos biológicos

    OpenAIRE

    Brines Solanes, Juan

    2009-01-01

    Nuestra contribución en este ciclo de conferencias, se limitará al estadio de desarrollo que en la especie humana comprende un periodo intrauterino, que incluye el embrión y el feto, y otro extrauterino, dividido entre la infancia y la adolescencia; desarrollo que se puede abordar, como es bien sabido, desde las perspectivas biológica, psicológica o social. Nuestra aportación contemplará principalmente los aspectos biológicos.

  15. Aspectos bioecológicos do mexilhao dourado Limnoperna Fortunei (bivalvia,mytilidae)(DUNKER, 1857)

    OpenAIRE

    Silva, Debora Pestana da

    2013-01-01

    Experimentos laboratoriais e análises em campo foram feitos para elucidar alguns aspectos da biologia de Limnoperna fortunei (BIVALVIA:MYTILIDAE), um molusco invasor originário do sudoeste asiático que vem colonizando a América do Sul desde 1991. Em relação ao seu hábito filtrador, comparando-se dois tipos de alimento, foi verificado que a temperatura teve menos influência na taxa de filtração do que o tamanho da partícula filtrada. A temperatura só influenciou sobre os valores de filtração n...

  16. Estado de situación sobre aspectos fiscales y accesibilidad del tabaco en la Argentina

    OpenAIRE

    Germán Rodríguez Iglesias; Belén Ríos; Cinthia Shammah; Verónica Schoj

    2016-01-01

    Introducción: Las medidas fiscales tendientes al aumento de precios de los productos del tabaco son una deuda pendiente delEstado argentino para reducir su consumo y proteger la salud pública. Objetivo: Realizar una revisión del “estado del arte” en materia de aspectos económicos de la epidemia del tabaco en la Argentinay su impacto en la salud pública.Material y métodos: Se realizó una revisión narrativa presentando la evidencia acerca del impacto del incremento de preciossobre el consum...

  17. Aspectos de diseño de un entorno de programación colaborativo

    OpenAIRE

    David Bracho; Alfredo Acurero; Carlos Rincón

    2008-01-01

    ResumenLa programación colaborativa, o programación en par, es una de las áreas más estudiadas actualmente debido a su impacto en el proceso de desarrollo de software. El propósito de la presente investigación consistió en determinar los aspectos básicos de diseño que un entorno de programación colaborativo debe ofrecer a los desarrolladores. La metodología utilizada consistió en realizar un análisis documental sobre la propuesta de Lussier acerca de la programacióncolaborativa con la finalid...

  18. Reseña: Multijugador. Los aspectos sociales del juego digital

    OpenAIRE

    Contreras Espinosa, Ruth S.

    2014-01-01

    Los juegos digitales se han convertido en objetos de cultura, son aceptados como medios de entretenimiento y son de interés para los investigadores por las actividades que en ellos realizan los usuarios. Sin embargo, “muchos aspectos permanecen aún sin explorar, sobre todo desde la perspectiva de los estudios de los medios y la comunicación”. Con estas palabras, la editorial nos introduce a las diversas formas de interacción humana que existen alrededor de los juegos. El volumen, nacido desde...

  19. Aspectos de la religión en la novela erótica griega

    OpenAIRE

    Lourdes Rojas y Álvarez Gayou

    2014-01-01

    Luego de una breve aproximación a la novela griega en general y de una sucinta presentación sobre la religión griega y las interpretaciones de los filólogos relativo a si las novelas son o no textos religiosos, se ofrece un tratamiento de los diversos aspectos de la religión en las novelas de Caritón de Afrodisias y de Aquiles Tacio, cuyo análisis se divide en tres apartados: los dioses, manifestaciones de los dioses y prácticas religiosas.

  20. ASPECTOS DE INTERÉS SOBRE LAS ACUAPORINAS EN LAS PLANTAS

    Directory of Open Access Journals (Sweden)

    Licet Chávez Suárez

    2014-01-01

    Full Text Available Las acuaporinas son proteínas que regulan el movimiento de agua a través de las membranas celulares. Se ha comprobado la participación de estos transportadores en la respuesta de las plantas ante estrés abiótico. Es propósito de este trabajo reseñar aspectos fundamentales sobre las acuaporinas tales como: estructura y función, regulación y su participación en la respuesta de la planta ante el estrés abiótico.

  1. Alimentación universitaria: aspectos nutricionales, microbiológicos y toxicológicos

    OpenAIRE

    Sospedra López, Mª Isabel

    2011-01-01

    En las últimas décadas la restauración colectiva universitaria ha adquirido gran importancia. Es importante garantizar la calidad y variedad de los menús desde un aspecto nutricional como microbiológico o toxicológico. El control del nivel de compuestos polares en aceites y grasas usados es una medida de prevención frente a tóxicos de origen químico. El estudio de la prevalencia de Anisakis simplex en muestras de pescado es una medida para garantizar la seguridad alimentaria. Los ser...

  2. Tres reformas educativas europeas: Reino Unido, Francia y España: aspectos comparativos.

    Directory of Open Access Journals (Sweden)

    Inmaculada Egido Gálvez

    1997-01-01

    Full Text Available Desde una perspectiva unicamente aproximativa, este trabajo lleva a cabo un breve repaso de las reforrnas realizadas en los ultimos afios en el sistema educativo de tres paises europeos: Reino Unido, Francia y Espana. Tras la consideracion de los principales cambios introducidos por las leyes de reforma en relaci6n con la estructura del sistema, el curriculum, el profesorado y el gobiemo y la administraci6n de la educacion, se presenta lavaloraci6n crftica de algunos de los aspectos mas relevantes de las reformas. Por ultimo, se realizan algunas reflexiones globales derivadas de la comparaci6n entre los tres casos tratados

  3. Práctica 1. Aspectos del desarrollo evolutivo en la legislación

    OpenAIRE

    Gomis Selva, Nieves; Delgado Domenech, Beatriz; González García, María; Sánchez Colodrero, Vicente; Jover Mira, Irene; León Antón, María José

    2011-01-01

    Esta práctica pretende que el alumnado tenga un acercamiento al Decreto que establece el currículo del segundo ciclo de Educación Infantil en la Comunidad Valenciana desde el enfoque de la psicología evolutiva. Se analizarán los aspectos principales del desarrollo: físico, cognitivo, afectivo, social y moral que aparecen en el Decreto y su importancia para la evolución del niño/a. Del mismo modo, se estudiarán las variables contextuales (familia, escuela, entorno próximo, etc) que influyen en...

  4. Esteroides inhalados en asma. Aspectos farmacológicos que fundamentan su elección

    OpenAIRE

    Alain R Rodríguez-Orozco; Jesica Figueroa P.; Jessica Villa A.

    2010-01-01

    El asma es una de las enfermedades crónicas más frecuentes. En su manejo los esteroides inhalados son la opción terapéutica más importante. Esta revisión se realizó con el objetivo de comentar aspectos farmacocinéticos y sobre eficacia y seguridad que justifican la elección de los esteroides inhalados en pacientes con asma. Se discute el uso de dispositivos para la inhalación del medicamento inhalado y se exponen las dosis recomendadas de esteroides inhalados en pacientes con asma. Se encontr...

  5. Aspectos celulares novedosos en los mecanismos de embriogénesis

    OpenAIRE

    Sara Elena Panizo Bruzón; Lourdes Bouza Piard; Yanmila Falcón Diéguez

    2014-01-01

    La decodificación del genoma humano inició una nueva era en la investigación científica, sobre todo en aquellos campos que involucran eventos celulares y, por consiguiente, a los mecanismos morfogenéticos básicos. Por su importancia, se realiza una revisión bibliográfica, con el objetivo de actualizar en aspectos relacionados con los fundamentos de los mecanismos morfogenéticos básicos. Para la revisión se emplearon los recursos disponibles en la red Infomed, se consultaron las bases de datos...

  6. Programación orientada a aspectos: metodología y evaluación

    OpenAIRE

    Asteasuain, Fernando; Contreras, Bernardo; Estévez, Elsa Clara; Fillottrani, Pablo Rubén

    2003-01-01

    La Ingeniería de Software tradicional carece actualmente de mecanismos adecuados para abstraer, y encapsular conceptos que no forman parte de la funcionalidad básica de los sistemas, tales como debugging, sincronización, distribución, seguridad, administración de memoria, y otros. El resultado de esta insuficiente abstracción es una notable disminución de la calidad del software final. Una de las alternativas más prometedoras para resolver este problema es la Programación Orientada a Aspectos...

  7. Aspectos morfológicos da terminologia da nanociência e nanotecnologia

    OpenAIRE

    Joel Sossai Coleti; Gladis Maria de Barcellos Almeida

    2010-01-01

    Neste artigo, descrevem-se e analisam-se os aspectos morfológicos do conjunto de termos mais frequentes da terminologia da Nanociência e Nanotecnologia, de forma a cooperar com a fixação e maior compreensão da terminologia da Nanociência e Nanotecnologia, áreas centrais das atividades de pesquisa, desenvolvimento e inovação no mundo todo, como também enriquecer a descrição morfológica do português a partir de um léxico especializado, de maneira a contribuir com o refinamento de conhecimento l...

  8. Aspectos biopsicossociais na surdocegueira Bio psycho social aspects in deaf blindness

    Directory of Open Access Journals (Sweden)

    Susana Maria Mana de Aráoz

    2008-04-01

    Full Text Available O presente artigo tem por objetivo discutir aspectos biopssicossociais referentes a pessoas com surdocegueira e suas famílias com o objetivo trazer a tona estas questões que se tem mostrado importantes para o desenvolvimento dos atendimentos aos surdocegos. Está baseado em dados bibliográficos de pesquisas com pais e outras divulgações abordando as causas que são, principalmente, Rubéola Congênita, prematuridade, infecções, acidentes, síndromes genéticas ou não. Coloca as conseqüências das mesmas, o desenvolvimento educacional alcançado e as necessidades das famílias em aspectos ligadas às áreas da saúde, educação, lazer, segurança e inclusão social. Também trata da adaptação das famílias ao impacto produzido pela surdocegueira tendo em conta aspectos orgânicos, afetivo-relacional, sócio-culturais e de produtividade. Reflete sobre a necessidade da divulgação dos conhecimentos e da ação conjunta de todas as partes envolvidas nos mais diversos aspectos da vida dos surdocegos para conseguir o desenvolvimento dos atendimentos para os surdocegos.The objective of the present article is to discuss bio-psycho-social aspects related to people with deaf blindness and their families so as to highlight those issues that have become important for the development of working methods in deaf blindness. It is based on bibliographic data found in research with parents of deaf blind children and other publications that deal with the causes of the condition. The main causes are congenital German measles, prematurity, infection, genetic or non genetic syndromes. The authors discuss the results of the various presentations, the expected educational development and the needs of the families in aspects related to health, education, leisure, safety and social inclusion. They also discusses issues of family adaptation to the impact produced by deaf blindness, taking into account organic, social-cultural, affect and inter

  9. Aspectos funcionais respiratórios na leptospirose humana Respiratory functional characteristics of human leptospirosis

    OpenAIRE

    Ana Paula Argolo Fontes; Diogo Piva Ribeiro; Larissa Smith Barreto de Jesus; Maria Luíza Dória Almeida; Ângela Maria da Silva

    2010-01-01

    INTRODUÇÃO: O comprometimento respiratório da leptospirose humana pode ser sua principal manifestação clínica e comumente está associado a maior morbimortalidade. MÉTODOS: Objetivando descrever aspectos funcionais respiratórios nessa doença, foram analisados 21 pacientes com oximetrias de pulso e espirometrias em dois momentos: em avaliação inicial e após cerca de 28 dias. RESULTADOS: Dois (9,5%) doentes tinham saturação periférica de oxigênio menor que 95%. Padrões espirométricos normais for...

  10. Aspectos culturales en el proceso de padecer cáncer de mama

    OpenAIRE

    Carvalho Fernández, Ana Fátima; Mesquita Melo, Elizabeth; de Almeida Araújo, Iliana María; Figueiredo Carvalho, Zuíla María

    2012-01-01

    El objetivo de este estudio fue identificar el aspecto cultural en el proceso de padecer cáncer de mama según la visión de un grupo de mujeres mastectomizadas. El estudio etnográfico se llevó a cabo con 16 mujeres mastectomizadas integrantes de un grupo de auto-ayuda por medio de observaciones y entrevistas. La etnografía nos permitió comprender mediante la observación detallada y el análisis del estilo de vida y patrones culturales de estas mujeres, el proceso de tener cáncer de mama. Las mu...

  11. Oestrosis. Aspectos Biológicos de la miasis cavitaria ovina

    OpenAIRE

    Héctor M. Puebla Domínguez; Nelson Zaldivar Quintero; Rafael Soñora Bonilla

    2005-01-01

    En el trabajo se hace referencia a los aspectos biológicos de la miasis cavitaria ovina (oestrus ovis). La entidad parasitaria se enriquece con las últimas informaciones disponibles en internet procedentes de numerosas investigaciones realizadas por otros colegas en el mundo. Nuestro país fue afectado por un brote de la enfermedad, la cual fue reportada en la provincia de Guantánamo en la zona de yacabo abajo del municipio de Imías. Se realizaron investigaciones clínico-anatomopatológicas en...

  12. Aspectos psicológicos que afectan al rendimiento de los triatletas

    OpenAIRE

    García Fraile, Samuel

    2014-01-01

    El objeto fundamental de estudio del trabajo que presentamos se basa en mostrar los principales aspectos psicológicos que afectan al rendimiento de los triatletas en entrenamientos y competiciones, así como reconocer de qué manera influye cada uno en los deportistas. Realizando una revisión bibliográfica respecto a deportes de ultra-resistencia y, de forma específica, en triatlón, centrados en la faceta mental de estas disciplinas encontramos los factores que influyen en la competición, ya qu...

  13. Drogodependencias: aspectos terminológicos y taxonómicos

    OpenAIRE

    Sánchez Turet, Miguel

    1991-01-01

    En este estudio se efectlia una revisión de los trabajos llevados a cabo previamente por la Organización Mundial de la Salud (OMS) sobre aspectos conceptuales y terminológicos de las Drogodependencias. Se pone especial énfasis en la definición y concepto de 'droga' y 'drogodependencia' a como en el término 'neuroadaptació' el cual es presentado como una alternativa al de 'dependencia flsica'. Se hace referencia también a las nuevas terminologías de 'abuso de drogas', o 'mal uso de drogas'. Po...

  14. Efecto del almacenamiento sobre la calidad de apio trozado : Aspectos quimicos de los mecanismos de defensa

    OpenAIRE

    Viña, Sonia Zulma

    2004-01-01

    En el presente Trabajo de Tesis se analizaron las variaciones de la calidad sensorial y de los principales aspectos físicoquímicos que la determinan, en apio mínimamente procesado almacenado durante 27 días a 0 ó 10°C. Se estudiaron las modificaciones ocurridas en la textura de los trozos y se investigó el contenido de lignina. Se identificaron los principales tipos de daño (amarilleamiento, desarrollo de apariencia blanco translúcida en los sectores de corte, pardeamiento de los haces vas...

  15. Aspectos psicobiológicos do comportamento alimentar Psychobiological aspects of feeding behavior

    OpenAIRE

    Rosana Passos Beinner Cambraia

    2004-01-01

    Esta revisão aborda alguns aspectos psicobiológicos ligados à manifestação do comportamento alimentar, e tem como objetivo evidenciar a relação entre os principais processos neuropsicológicos e a neurociência nutricional. Algumas estruturas neurais estão associadas ao controle alimentar por mecanismos distintos e correlatos que ocorrem no hipotálamo, hipocampo e em outras áreas como no cerebelo, bulbo olfatório, glândulas pituitária e pineal que exercem funções distintas, porém influênciam o ...

  16. Introducción de aspectos de geolocalización en una vivienda inteligente

    OpenAIRE

    Calabuig Monerris, Lorena

    2015-01-01

    [ES] En este trabajo se van a introducir aspectos de geolocalización de los habitantes de una vivienda inteligente para mejorar el comportamiento de ésta y fomentar el ahorro energético. Para tal fin se va a desarrollar una aplicación móvil en Android que enviará la posición de cada habitante al servidor de la vivienda inteligente mediante peticiones REST y así pueda activar o desactivar los distintos dispositivos de la casa, como puede ser la climatización; además, avisará al ...

  17. Ajuste psicológico en la infancia: aspectos emocionales y variables asociadas

    OpenAIRE

    Ordóñez López, Ana

    2015-01-01

    La segunda infancia es la etapa evolutiva enmarcada entre los 6 y los 12 años, en la cual los factores físicos, cognitivos y psicosociales se combinan en el desarrollo del individuo. Así, un desarrollo positivo en la infancia es consecuencia de múltiples factores y agentes. Las emociones son un aspecto importante en la vida de las personas, en parte porque tienen un marcado carácter adaptativo y funcional, pero sobretodo porque impregnan toda nuestra vida cotidiana, y mediatizan nuestras rela...

  18. Aspectos biopsicossociais na surdocegueira Bio psycho social aspects in deaf blindness

    OpenAIRE

    Susana Maria Mana Aráoz; Maria da Piedade Resende da Costa

    2008-01-01

    O presente artigo tem por objetivo discutir aspectos biopssicossociais referentes a pessoas com surdocegueira e suas famílias com o objetivo trazer a tona estas questões que se tem mostrado importantes para o desenvolvimento dos atendimentos aos surdocegos. Está baseado em dados bibliográficos de pesquisas com pais e outras divulgações abordando as causas que são, principalmente, Rubéola Congênita, prematuridade, infecções, acidentes, síndromes genéticas ou não. Coloca as conseqüências das me...

  19. Aspectos formales y visuales en los cuestionarios de salud y calidad de vida

    OpenAIRE

    Nereida Congost Maestre

    2012-01-01

    Una falta de atención en el formato de los cuestionarios de salud y calidad de vida ocasiona que muchas preguntas no se contesten porque no se pueden leer bien. Se hace aquí una reflexión sobre tales aspectos visuales, analizando siete de los cuestionarios genéricos en lengua inglesa más utilizados en el mundo y comparándolos, a su vez, con sus traducciones al español. Los resultados que se obtienen subrayan la idea de la importancia que tiene la presentación del cuestionario para conseguir l...

  20. Algunos aspectos de la Reforma al Código de Procedimiento Laboral (Ley 712 de 2001

    Directory of Open Access Journals (Sweden)

    Armando Rojas

    2002-01-01

    Full Text Available El pasado 9 de junio entró en vigencia la ley 712 del 2001, ley quereformó algunos aspectos del código procesal del trabajo que ahora sellama código procesal del trabajo y de la seguridad social. La razón desu creación obedeció a la necesidad de actualizar un estatuto procesal demás de cincuenta años a la práctica procesal de la actualidad, necesitadade la urgente descongestión de los procesos en los despachos judiciales

  1. Aspectos celulares en el diagnóstico y tratamiento de los defectos faciales

    OpenAIRE

    Sara Elena Panizo Bruzón; Salvador Javier Santos Medina; Lourdes Bouza Piard

    2014-01-01

    El manejo de los defectos congénitos refleja globalmente el estilo de vida y la cultura de los diferentes pueblos. Aunque los defectos faciales no constituyan peligro para la vida, existe el daño psicológico y estético para el niño y la angustia para la familia. Se realizó una revisión bibliográfica de los aspectos celulares novedosos, alternativas para el diagnóstico y tratamiento de los defectos congénitos faciales, empleando los recursos disponibles en la red infomed. Se reporta la fisura ...

  2. System of KF, KMoO4, BaF, BaMoO4

    International Nuclear Information System (INIS)

    The interaction between salts forming a ternary mutual K, Ba//F, MoO4 system has been studied by differential thermal analysis and visual-polythermal techniques. The system liquidus has been plotted, the compositions and temperatures of the non-variant points have been determined, and the fields of the crystallizing phases have been defined. An X-ray analysis has been made of K2Ba(MoO4)2. It has been established that double potassium and barium molybdate crystallizes to form a palmierite-type structure with the following hexagonal unit cell parameters: a-6.006 A, c=21.34 A, Z=3, space group R anti 3m

  3. REVIEW: TALES OF KHA BA DKAR PO

    Directory of Open Access Journals (Sweden)

    Jundan (Jasmine Zhang

    2015-03-01

    Full Text Available Review of: Jing Guo . 2012. Xue shan zhi shu [Tales of Kha ba dkar po] [ཁ་བ་དཀར་པོ]. Kunming: Yunnan People's Press. My favorite color is to add a little white on the whiteness, as if there was a snow-white eagle landing on a snow-covered mountain rock. My favorite color is to add a bit green on the greenness, as if there was an emerald parrot flying in the wild walnut woods. Deqin xianzi lyrics. These lyrics evoke a space beyond a sense of realism. In his book, Tales of Kha ba dkar po (ToK, Guo mentions these lines three times, suggesting a transcendental experience one may encounter in Tibetan areas while, at the same time, humbled by the mindset of human nature relations enacted by Tibetan people. ToK is, in many ways, a valuable academic work. Guo's favorite lines of xianzi allude to a 'space-in-between' the secular and sacred, which provides a unique experience for a broad readership, and induces the readers to deeper reflections on topics such as 'nature/ culture', 'belief', 'rite', and 'life/ death'. ToK is one of nineteen contemporary anthropological and ethnological works conducted in Yunnan Province, Southwest China and published in the 'Anthropology and Ethnology series in Contemporary China'. In the preface for the series, Yin (2012 suggests that there are two primary reasons for the somewhat slow development of Chinese scholarship in the field of anthropology and ethnology. One is the historically Han-centered intellectual atmosphere, and the other is the ideological ambivalence that ethnic culture has faced since the establishment of the People's Republic of China. In this context, Guo's longitudinal academic and intellectual engagement with the Tibetan communities in northwest Yunnan is included in this series as part of the increasing recognition of the significance of understanding southwest China's complex ethnic and cultural diversity.

  4. Snakebites in Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    H. N. Albuquerque

    2005-09-01

    Full Text Available The epidemiological data on snakebites in the state of Paraíba, Brazil, is scarce. This accounts for the difficulties in helping the victims. Hence, to obtain the clinical and epidemic profile of the snakebite accidents in Paraíba, we studied the number of cases recorded in this state between January 1995 and December 2000. The data was collected from these sources: Center for Toxicological Assistance (Centro de Assistência Toxicológica - CEATOX and State Secretariat of Health (Secretaria Estadual de Saude, João Pessoa; 3rd Regional Health Center (3º Núcleo Regional de Saúde - NRS and the Division of Epidemiological Vigilance of the Municipal Secretariat of Health (Divisão de Vigilância Epidemiológica da Secretaria Municipal de Saúde - DVE/SMS, Campina Grande. The annual distribution of the snakebite incidence showed an irregularity and an increase in March, May and August; followed by a large reduction in November and December. It was also observed that snakebites occurred more frequently in the rural area, mainly among the male laborers between 10-49 years. In most cases, the bite occurred on the leg or foot. The interval between the snakebite and the medical assistance was less than six hours. The most common symptoms were pain, edema, erythema, and bleeding. The low lethality index and the high frequency of healing, without sequels, suggest that the treatment with serum neutralized the poison, indicating the efficacy of this treatment against snakebites by the specific species found in this region.

  5. Radionuclides incorporated by inhabitants of surrounding Brazilian uranium mines

    International Nuclear Information System (INIS)

    Full text: Brazil has the 6th largest global geological reserve of uranium, with the main reserve in Santa Quiteria - CE still not under exploration. Currently, uranium mining and processing in Brazil only occur near to the city of Caetite - BA. Several Non-Governmental Organizations claim that uranium mining in this region is polluting and may jeopardize the human health and safety and the environment. However, those in charge of the complex extraction and production of 'yellow cake' for generating fuel to the nuclear power plants reject these allegations. U-238 may be deposited in the skeleton by replacing the calcium, thus it is possible to estimate its incorporation by determining its concentration in the teeth. This study aimed to identify potential problems caused by mining to the population of Caetite, analyzing U-238 contained in samples of teeth extracted for orthodontic reasons from Caetite residents. The concentration of thorium and potassium incorporated were also determined by ICP-MS, as well the cumulative dose of radiation received by this population was estimated. For comparison sake, the same analysis was performed in samples from Santa Quiteria and Aracaju - SE (used as a control area). The doses estimated were compared to doses obtained with EPR spectra of the same samples. The accumulated amount of radioisotopes in the teeth of the population of Caetite is probably due to natural origin, thus it is not possible to state that the mining process in Caetite increases pollution or radiation exposure in a meaningful way. (author)

  6. Electronic structure of BaO/W cathode surfaces

    Science.gov (United States)

    Muller, Wolfgang

    1989-01-01

    The local electronic structure of the emissive layer of barium dispenser thermionic cathodes is investigated theoretically using the relativistic scattered-wave approach. The interaction of Ba and O with W, Os, and W-Os alloy surfaces is studied with atomic clusters modeling different absorption environments representative of B- and M-type cathodes. Ba is found to be strongly oxidized, while O and the metal substrate are in a reduced chemical state. The presence of O enhances the surface dipole and Ba binding energy relative to Ba on W. Model results for W-Os alloy substrates show only relatively small changes in Ba and O for identical geometries, but very large charge redistributions inside the substrate, which are attributed to the electronegativity difference between Os and W. If Os is present in the surface layer, the charge transfer from Ba to the substrate and the Ba binding energy increase relative to W. Explanations are offered for the improved electron emission from alloy surfaces and the different emission enhancement for different alloy substrates.

  7. CARCINOMA BRONQUÍOLO-ALVEOLAR: ASPECTOS NA TOMOGRAFIA COMPUTADORIZADA DE ALTA RESOLUÇÃO

    Directory of Open Access Journals (Sweden)

    Moreira Luiza Beatriz Melo

    2002-01-01

    Full Text Available O carcinoma bronquíolo-alveolar é um tipo de carcinoma broncogênico de crescimento insidioso, que surge nas paredes das vias aéreas distais e se dissemina utilizando o septo alveolar como um estroma, preservando a arquitetura pulmonar. Neste trabalho foram analisadas as tomografias computadorizadas de alta resolução de 17 pacientes com carcinoma bronquíolo-alveolar. Ao contrário do relatado na literatura, foram observados predomínio no sexo masculino (71% e maior freqüência da associação das formas de consolidação e multinodular (53% em relação à forma nodular solitária (12%, multinodular (12% e de consolidação (23%. Os aspectos mais encontrados foram: áreas de consolidação (76%, broncograma aéreo (71%, áreas de baixa atenuação provavelmente devidas à presença de muco (60%, espessamento de septos interlobulares, opacidades em vidro fosco e nódulos confluentes (54% cada, e pavimentação em mosaico (36%. Os nódulos cavitados, a atelectasia, o sinal do halo e o aspecto de "árvore em brotamento" foram observados em apenas um caso cada.

  8. Aspectos subjetivos implicados en la demanda de consulta médica frecuente

    Directory of Open Access Journals (Sweden)

    Catalina Echeverri Gallo

    2012-01-01

    Full Text Available Este artículo contiene los resultados de una investigación realizada con el fin de acercarse a la comprensión de los aspectos subjetivos implicados en el pedido de consulta médica de consultantes frecuentes. Se utilizó un diseño cualitativo, la metodología fue el estudio de casos y la técnica de recolección de información fue la entrevista semiestructurada a profundidad. La muestra correspondió a nueve consultantes frecuentes de una institución de salud de Medellín. Los resultados sugieren que existe una búsqueda de alivio y control en la consulta médica por parte de los consultantes frecuentes, motivada por el sufrimiento que manifiestan y padecen. Aspectos como el vínculo con el médico, la demanda del paciente y las representaciones sociales que construyen son determinantes para la percepción de control y alivio de este sufrimiento y el inicio y mantenimiento de la consulta frecuente en salud.

  9. Aspectos significativos surgidos de la experiencia de haber sido responsable de un evento adverso en salud

    Directory of Open Access Journals (Sweden)

    Augusto Hernán Ferreira-Umpiérrez

    2014-01-01

    Full Text Available Objetivo: conocer los aspectos significativos para las enfermeras sobre su experiencia de haber sido responsables de un evento ad- verso en salud. Materiales y métodos: estudio cualitativo exploratorio, con el enfoque de la hermenéutica dialéctica. Se utilizó la técnica de análisis de contenido. Muestra constituida por doce enfermeras que tuvieron al menos una experiencia de responsabilidad ante un evento adverso con un paciente, y por cuatro supervisores de enfermería con responsabilidad de supervisión al ocurrir el evento adverso. Resultados: bajo el enfoque de la hermenéutica dialéctica, el análisis de los datos permitió construir las siguientes categorías relacio- nadas con la organización de salud y los recursos humanos: el contexto organizacional, el desconocimiento del proceso de notifi cación, la sobrecarga de trabajo, la ausencia de descanso. Conclusiones: reconocer la importancia del contexto organizacional donde se desarrollan los cuidados, el desconocimiento del proceso de notificación como aspecto por mejorar, la sobrecarga de trabajo y la ausencia d e descanso del personal. Es necesario profundizar en el tema mediante investigaciones y desarrollo de intervenciones que promuevan la cult ura de seguridad en la atención sanitaria, con implicaciones en la práctica y para la formación de las enfermeras.

  10. ASPECTOS TEÓRICOS E METODOLÓGICOS DAS REPRESENTAÇÕES SOCIAIS

    Directory of Open Access Journals (Sweden)

    Jaime Alonso Caravaca Morera

    2015-01-01

    Full Text Available Este manuscrito invita a discutir la naturaleza plural de los principales aspectos conceptuales, teóricos y metodológicos de las representaciones sociales en sus diferentes manifestaciones. Se utilizaron como base para la discusión de los tópicos los principales textos que amalgaman la visión de investigadores reconocidos de la Psicología, Sociología y Enfermería. Según Moscovici, las representaciones sociales corresponden a actos de pensamientos en los cuales los sujetos se relacionan con el objeto, y mediante algunos mecanismos ese objeto es substituido por símbolos, transformándolo en representación en la mente del sujeto. Ese proceso de representación implica diferentes procesos de contextualización, transformación, construcción e interpretación mediados por aspectos socioculturales y lingüísticos. En la perspectiva transdiciplinar, las representaciones sociales emergen como un campo multidimensional que posibilita cuestionar la naturaleza del conocimiento y la relación individuo-sociedad, implantándose en las principales corrientes epistemológicas post-modernas para crear identidades operativas de comunicación y actuación cotidiana.

  11. Aspectos e impactos ambientais envolvidos em um laticínio de pequeno porte

    Directory of Open Access Journals (Sweden)

    C. S. Barbosa

    2009-04-01

    Full Text Available Este trabalho teve como objetivo determinar os aspectos e impactos ambientais envolvidos em um Laticínio de pequeno porte situado na Zona da Mata Mineira. Para atender tais objetivos foi realizado um diagnostico a partir de um monitoramento em todas as linhas de produção, aliado à aplicação de um questionário e uma lista de verificação. Após análise do questionário aplicado e monitoramento das linhas foram determinados os aspectos e impactos ambientais envolvidos no laticínio. Foram sugeridas medidas mitigadoras para que se tenha uma produção sustentável. Os principais contribuintes detectados para a carga orgânica do laticínio foram o desperdício, o soro e o leitelho que são destinados de forma incorreta. Conclui-se que para o laticínio se adequar ao processo de produção sustentável, faz-se necessário que algumas medidas mitigadoras sejam implementadas. Através do estudo nota-se que diversas medidas propostas não necessitam de altos investimentos e tecnologia apenas algumas mudanças e atitude.

  12. Processing of R-Ba-Cu-O superconductors

    International Nuclear Information System (INIS)

    Precipitation processes were developed to introduce second phases as flux pinning centers in Gd-Ba-Cu-O and Nd-Ba-Cu-O superconductors. In Gd-Ba-Cu-O, precipitation is caused by the decrease of the upper solubility limit of Gd1+xBa2-xCu3O7 solid solution (Gd123ss) in low oxygen partial pressure. Processing of supersaturated Gd1.2Ba1.8Cu3O7 in low oxygen partial pressure can produce dispersed second phases. Gd211 is formed as a separate phase while extensive Gd124 type stacking fault is formed instead of a separate CuO phase. As a result of the precipitation reaction, the transition temperature and critical current density are increased. In Nd-Ba-Cu-O, precipitation is caused by the decrease of the lower solubility limit of Nd1+xBa2-xCu3O7 solid solution (Nd123ss) in oxygen. DTA results reveal the relative stability of Nd123ss in different oxygen partial pressures. In 1 bar oxygen partial pressure, Nd123ss with x = 0.1 is the most stable phase. In lower oxygen partial pressures, the most stable composition shifts towards the stoichiometric composition. The relative stability changes faster with decreasing oxygen partial pressure. Therefore, processing in oxygen and air tends to produce broad superconducting transitions but sharp transitions can be achieved in 0.01 bar and 0.001 bar oxygen partial pressures. While the lower solubility limits in 0.01 bar and 0.001 bar oxygen partial pressures remain at x = 0.00, the solubility limits in oxygen and air show a narrowing with decreasing temperature. Because of the narrowing of the solubility range in oxygen, oxygen annealing of Nd123 initially processed in low oxygen partial pressures will result in precipitation of second phases. The equilibrium second phase is BaCuO2 for temperature above 608 C, and at lower temperatures the equilibrium second phases are Ba2CuO3.3 and Ba2Cu3O5+y. However, annealing at low temperature may produce a fine metastable transition phase. A coherent intermediate perovskite structure with a

  13. BaMAP: A Broadband Multimedia Application Platform

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    In this paper, a broadband multimedia application platform, BaMAP, is introduced. The BaMAP aims to offer content and service providers a good integrated environment for efficient content production, management, delivery and sharing. It supports large-scale hierarchical storage, as well as mechanisms for content distribution and queries from remote nodes. The on-demand service, part of the BaMAP, offers two access interfaces, DVB-C and IP, which allow the platform to run on most of the existing access networks.

  14. Proton microbeam irradiation effects on PtBA polymer

    Indian Academy of Sciences (India)

    J Kamila; S Roy; K Bhattacharjee; B Rout; B N Dev; R Guico; J Wang; A W Haberl; P Ayyub; P V Satyam

    2006-04-01

    Proton beam lithography has made it possible to make various types of 3D-structures in polymers. Usually PMMA, SU-8, PS polymers have been used as resist materials for lithographic purpose. Microbeam irradiation effects on poly-tert-butyl-acrylate (PtBA) polymer using 2.0 MeV proton microbeam are reported. Preliminary results on pattern formation on PtBA are carried out as a function of fluence. After writing the pattern, a thin layer of Ge is deposited. Distribution of Ge in pristine and ion beam patterned surface of PtBA polymer is studied using the optical and secondary electron microscopic experimental methods.

  15. AMiBA: Array for Microwave Background Anisotropy

    OpenAIRE

    Lo, K. Y.; Chiueh, T.H.; Martin, R. N.; Ng, Kin-Wang; Liang, H.; Pen, Ue-Li; Ma, Chung-Pei

    2000-01-01

    As part of a 4-year Cosmology and Particle Astrophysics (CosPA) Research Excellence Initiative in Taiwan, AMiBA $-$ a 19-element dual-channel 85-105 GHz interferometer array is being specifically built to search for high redshift clusters of galaxies via the Sunyaev-Zeldovich Effect (SZE). In addition, AMiBA will have full polarization capabilities, in order to probe the polarization properties of the Cosmic Microwave Background. AMiBA, to be sited on Mauna Kea in Hawaii or in Chile, will rea...

  16. IBM-2 calculation of band mixing in 132Ba

    International Nuclear Information System (INIS)

    The band crossing in 132Ba has been investigated by using the interacting boson model. A broken neutron pair has been coupled to a collective boson core. The boson-fermion interaction hamiltonian contains terms which can transform a boson into a pair of quasiparticles and vice versa. The parameters were partly determined by fitting the collective states of 132,134Ba and the yrast states of 131Ba. The energy backbending has been satisfactorily reproduced. Good agreement of the electromagnetic moments has been reached. The structure of the wave functions has been discussed. (author)

  17. Aspectos psicossociais da homofobia intrafamiliar e saúde de jovens lésbicas e gays

    OpenAIRE

    Juliana Perucchi; Brune Coelho Brandão; Hortênsia Isabela dos Santos Vieira

    2014-01-01

    O número de pesquisas sobre diferentes aspectos da homofobia cresceu nos últimos dez anos. Entretanto, há uma carência de estudos que analisem os aspectos psicossociais que envolvem as experiências de jovens lésbicas e gays mediante situações de violência e os desdobramentos destas na sua saúde. O presente artigo busca relatar os resultados de uma pesquisa que objetivou analisar como se constituem as situações de homofobia no âmbito das relações familiares vividas por jovens lésbicas e gays, ...

  18. ASPECTOS AMBIENTALES EN LA EXPERIMENTACIÓN QUÍMICA PARA PREVENIR RIESGOS A LA SALUD Y AL AMBIENTE

    OpenAIRE

    María O. Peña O.; Esperanza González Q.; Walter Ramírez M.; Sergio A. Franco Ch.

    2011-01-01

    Un aspecto ambiental se considera como cualquier material o elemento físico o químico que el hombre arroja al agua, al aire y al suelo o que interactúe con el ambiente y propicie un riesgo para la salud y para el medio ambiente. Los residuos originados durante el desarrollo de actividades relacionadas con la experimentación química, aunque en una proporción menor que en un proceso industrial, ellos pueden ser residuos peligrosos al medio ambiente. Los aspectos ambientales se asocian con las a...

  19. Phase equilibria in BaS-Cu2S-Gd2S3 system

    International Nuclear Information System (INIS)

    Phase equilibria in BaS-Cu2S-Gd2S3 system are studied along isothermal (800 K) and polythermal sections CuGdS2-BaS, Cu2S-BaGdCuS3, BaGdCuS3-Gd2S3, BaGdCuS3-BaGd2S4. Complex sulfide BaGdCuS3 with orthorhombic lattice is formed, lattice parameters are determined. Compositions of eutectics forming in the system are determined

  20. Theoretical electric quadrupole transition probabilities for Ca, Sr and Ba

    Science.gov (United States)

    Bauschlicher, C. W., Jr.; Langhoff, S. R.; Jaffe, R. L.; Partridge, H.

    1984-01-01

    The 1D-1S quadrupole transition probabilities for Ca, Sr and Ba have been computed using extended GTO and STO valence basis sets and configuration-interaction wavefunctions that include the important core-valence correlation effects. For Ba and Sr, the relativistic contraction of the core orbitals was accounted for in the GTO calculations by a relativistic effective-core potential. The computed Einstein coefficient for Ca of 39.6/s is in excellent agreement with the recent experimental value of 40 + or - 8/s. The best Einstein coefficients for Sr (44.7/s) and Ba (2.98/s) imply increasing quadrupole line strengths down the column. Relativistic effects substantially increase the quadrupole Einstein coefficient for Ba.

  1. Octa-coordination and the hydrated Ba2+(aq) ion

    CERN Document Server

    Chaudhari, Mangesh I; Rempe, Susan B

    2014-01-01

    The hydration structure of Ba^{2+} ion is important for understanding blocking mechanisms in potassium ion channels. Here, we combine statistical mechanical theory, ab initio molecular dynamics simulations, and electronic structure methods to calculate the hydration free energy and local hydration structure of Ba^{2+}(aq). The predicted hydration free energy (-302.9$\\pm$0.7 kcal/mol) matches the experimental value (-302.56 kcal/mol) when the fully occupied and exclusive inner solvation shell is treated. In the local environment defined by the inner and first shell of hydrating waters, Ba^{2+} is directly coordinated by eight (8) waters. Octa-coordination resembles the structure of Ba^{2+} and K^+ bound in potassium ion channels, but differs from the local hydration structure of K^+(aq) determined earlier.

  2. AMiBA Array for Microwave Background Anisotropy

    CERN Document Server

    Lo, K Y; Martin, R N; Ng, K W; Liang, H; Pen, U; Ma Chung Pei; Ng, Kin-Wang; Pen, Ue-li; Ma, Chung-Pei

    2000-01-01

    As part of a 4-year Cosmology and Particle Astrophysics (CosPA) Research Excellence Initiative in Taiwan, AMiBA $-$ a 19-element dual-channel 85-105 GHz interferometer array is being specifically built to search for high redshift clusters of galaxies via the Sunyaev-Zeldovich Effect (SZE). In addition, AMiBA will have full polarization capabilities, in order to probe the polarization properties of the Cosmic Microwave Background. AMiBA, to be sited on Mauna Kea in Hawaii or in Chile, will reach a sensitivity of $\\sim 1$ mJy or 7$\\mu$K in 1 hour. The project involves extensive international scientific and technical collaborations. The construction of AMiBA is scheduled to starting operating in early 2004.

  3. Ba-bah on tulnud / Liina Jänes

    Index Scriptorium Estoniae

    Jänes, Liina, 1977-

    2005-01-01

    Eesti noori disainereid-sisearhitekte ühendavast disainiagentuurist Ba-bah, selle eesmärgist. Agentuuri juhib Veiko Jääger. Mais 2005 Disaini- ja Arhitektuurigaleriis toimunud Ba-bahi avanäitusest, kus oli väljas töid EKA sisearhitektuuri, klaasi-, ehte- ja sepakunsti eriala üliõpilastelt ning metallmööbli valmistajalt Kalle Pruudenilt

  4. Configuration Database for BaBar On-line

    OpenAIRE

    Bartoldus, R.; Dubois-Felsmann, G.; Kolomensky, Y.; Salnikov, A.

    2003-01-01

    The configuration database is one of the vital systems in the BaBar on-line system. It provides services for the different parts of the data acquisition system and control system, which require run-time parameters. The original design and implementation of the configuration database played a significant role in the successful BaBar operations since the beginning of experiment. Recent additions to the design of the configuration database provide better means for the management of data and add ...

  5. Leptonic B Decays at BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Baracchini, Elisabetta; /Rome U. /INFN, Rome

    2011-11-10

    We will present the most recent results on leptonic B decays B{sup {+-}(0)} {yields} K*{sup {+-}(0)}{nu}{bar {nu}} and B{sup {+-}} {yields} {mu}{sup {+-}}{nu}, based on the data collected by the BaBar detector at PEP-II, an asymmetric e{sup +}e{sup -} collider at the center of mass energy of the {Upsilon}(4S) resonance. Rare B decays have always been a standard probe for New Physics (NP) searches. The very low Standard Model (SM) rate of these decays often make them unaccessible with the present experimental datasets, unless NP effects enhance the rate up to the current experimental sensitivity. Moreover, as NP effects can modify the decay kinematic, particular attention must be paid in order to perform a model independent analysis. A B-Factory provides an unique environment to investigate these processes. The high number of B{bar B} pairs produced by a B-Factory often allows to approach the needed experimental sensitivity. Moreover, the clean environment and the closed kinematic of the initial state enable to obtaining a very pure sample where to look for these decays.

  6. Leptonic B Decays at BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Monorchio, Diego; /INFN, Naples /Naples U.

    2011-09-13

    The authors will present the most recent results on leptonic B decays B{sup {+-}(0)} {yields} K*{sup {+-}(0)} {nu}{bar {nu}} and B{sup {+-}} {yields} {mu}{sup {+-}}{nu}, based on the data collected by the BaBar detector at PEP-II, an asymmetric e{sup +}e{sup -} collider at the center of mass energy of the {Upsilon}(4S) resonance. Rare B decays have always been a standard probe for New Physics (NP) searches. The very low Standard Model (SM) rate of these decays often make them unaccessible with the present experimental datasets, unless NP effects enhance the rate up to the current experimental sensitivity. Moreover, as NP effects can modify the decay kinematic, particular attention must be payed in order to perform a model independent analysis. A B-Factory provides an unique environment where to investigate these processes. The high number of B{bar B} pairs produced by a B-Factory often allows to approach the needed experimental sensitivity. Moreover, the clean environment and the closed kinematic of the initial state enable to obtaining a very pure sample where to look for these decays.

  7. Tests of AMiBA Data Integrity

    CERN Document Server

    Nishioka, Hiroaki; Wu, Jiun-Huei Proty; Ho, Paul T P; Huang, Chih-Wei Locutus; Koch, Patrick M; Liao, Yu-Wei; Lin, Kai-Yang; Liu, Guo-Chin; Molnar, Sandor M; Umetsu, Keiichi; Birkinshaw, Mark; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao; Chang, Su-Wei; Chen, Ming-Tang; Han, Chih-Chiang; Huang, Yau-De; Hwang, Yuh-Jing; Jiang, Homin; Kesteven, Michael; Kubo, Derek Y; Li, Chao-Te; Martin-Cocher, Pierre; Oshiro, Peter; Raffin, Philippe; Wei, Tashun; Wilson, Warwick

    2008-01-01

    We describe methods used to validate data from the Y.T. Lee Array for Microwave Background Anisotropy (AMiBA), an interferometric array designed to measure the Sunyaev-Zel'dovich effect and the anisotropy of the Cosmic Microwave Background (CMB). We perform several statistical tests on data from pointed galaxy cluster observations taken in 2007 and noise data from long-term blank sky observations and measurements with the feeds covered by the absorbers. We apply power spectrum analysis, cross power spectrum analysis among different outputs with different time lags in our analog correlator, and sample variance law tests to noise data. We find that (1) there is no time variation of electronic offsets on the time scale of our two-patch observations (~10 minutes); (2) noise is correlated by less than 10% between different lags; and (3) the variance of noise scales with the inverse of time. To test the Gaussianity of the data, we apply Kolmogorov-Smirnov (K-S) tests to cluster data, and find that a 5% significance...

  8. Tests of AMiBA Data Integrity

    Science.gov (United States)

    Nishioka, Hiroaki; Wang, Fu-Cheng; Wu, Jiun-Huei Proty; Ho, Paul T. P.; Huang, Chih-Wei Locutus; Koch, Patrick M.; Liao, Yu-Wei; Lin, Kai-Yang; Liu, Guo-Chin; Molnar, Sandor M.; Umetsu, Keiichi; Birkinshaw, Mark; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao; Chang, Su-Wei; Chen, Ming-Tang; Han, Chih-Chiang; Huang, Yau-De; Hwang, Yuh-Jing; Jiang, Homin; Kesteven, Michael; Kubo, Derek Y.; Li, Chao-Te; Martin-Cocher, Pierre; Oshiro, Peter; Raffin, Philippe; Wei, Tashun; Wilson, Warwick

    2009-04-01

    We describe methods used to validate data from the Y.T. Lee Array for Microwave Background Anisotropy (AMiBA), an interferometric array designed to measure the Sunyaev-Zel'dovich effect and the anisotropy of the cosmic microwave background. We perform several statistical tests on data from pointed observations of galaxy clusters taken in 2007 and noise data from long-term blank-sky observations and measurements with the feeds covered by the absorbers. We apply power-spectrum analysis, cross-power-spectrum analysis among different outputs with different time lags in our analog correlator, and sample-variance law tests to noise data. We find that (1) there is no time variation of electronic offsets on the timescale of our two-patch observations (~10 minutes); (2) noise is correlated by less than 10% between different lags; and (3) the variance of noise scales with the inverse of time. To test the Gaussianity of the data, we apply Kolmogorov-Smirnov tests to cluster data and find that a 5% significance level efficiently detects data sets with known hardware problems without rejecting an excess of acceptable data. We also calculate third- and fourth-order moments and cumulants for the noise residual visibilities and find that about 95% of our data are within the 99% confidence regions of Gaussianity.

  9. High spin structure in {sup 130,131}Ba

    Energy Technology Data Exchange (ETDEWEB)

    Kaur, Navneet; Kumar, A.; Singh, Amandeep; Kumar, S.; Kaur, Rajbir; Singh, Varinderjit; Behera, B.R.; Singh, K.P.; Singh, G. [Panjab University, Department of Physics, Chandigarh (India); Mukherjee, G. [Variable Energy Cyclotron Centre, Kolkata (India); Sharma, H.P. [Banaras Hindu University, Department of Physics, Varanasi (India); Kumar, Suresh [Delhi University, Department of Physics and Astrophysics, Delhi (India); Kumar Raju, M.; Madhusudhan Rao, P.V. [Andhra University, Department of Nuclear Physics, Vishakapatnam (India); Muralithar, S.; Singh, R.P.; Kumar, Rakesh; Madhvan, N.; Bhowmik, R.K. [Inter University Accelrator Centre, New Delhi (India)

    2014-01-15

    High spin states of {sup 130,131}Ba have been investigated via fusion evaporation reactions {sup 122}Sn({sup 13}C,4n){sup 131}Ba and {sup 122}Sn({sup 13}C, 5n){sup 130}Ba at E{sub beam}=65 MeV. The level schemes of {sup 130,131}Ba have been extended by placing several new {gamma} transitions. A few interband transitions connecting two negative-parity bands, which are the experimental fingerprints of signature partners, have been established in {sup 130}Ba. Spin and parity of a side band have been assigned in {sup 131}Ba and this dipole band is proposed to have a three-quasiparticle configuration, {nu}h{sub 11/2} x {pi}h{sub 11/2} x {pi}g{sub 7/2}. The observed band structures and nuclear shape evolution as a function of the angular momentum have been discussed in the light of Total-Routhian-Surface calculations. (orig.)

  10. Constraining Intracluster Gas Models with AMiBA13

    Science.gov (United States)

    Molnar, Sandor M.; Umetsu, Keiichi; Birkinshaw, Mark; Bryan, Greg; Haiman, Zoltán; Hearn, Nathan; Shang, Cien; Ho, Paul T. P.; Locutus Huang, Chih-Wei; Koch, Patrick M.; Liao, Yu-Wei Victor; Lin, Kai-Yang; Liu, Guo-Chin; Nishioka, Hiroaki; Wang, Fu-Cheng; Proty Wu, Jiun-Huei

    2010-11-01

    Clusters of galaxies have been extensively used to determine cosmological parameters. A major difficulty in making the best use of Sunyaev-Zel'dovich (SZ) and X-ray observations of clusters for cosmology is that using X-ray observations it is difficult to measure the temperature distribution and therefore determine the density distribution in individual clusters of galaxies out to the virial radius. Observations with the new generation of SZ instruments are a promising alternative approach. We use clusters of galaxies drawn from high-resolution adaptive mesh refinement cosmological simulations to study how well we should be able to constrain the large-scale distribution of the intracluster gas (ICG) in individual massive relaxed clusters using AMiBA in its configuration with 13 1.2 m diameter dishes (AMiBA13) along with X-ray observations. We show that non-isothermal β models provide a good description of the ICG in our simulated relaxed clusters. We use simulated X-ray observations to estimate the quality of constraints on the distribution of gas density, and simulated SZ visibilities (AMiBA13 observations) for constraints on the large-scale temperature distribution of the ICG. We find that AMiBA13 visibilities should constrain the scale radius of the temperature distribution to about 50% accuracy. We conclude that the upgraded AMiBA, AMiBA13, should be a powerful instrument to constrain the large-scale distribution of the ICG.

  11. CONTRAST STUDY ON CT AND BA IN DIAGNOSIS OF PATIENTS WITH ATHEROTHROMBOTIC BRAIN INFARCTION

    Institute of Scientific and Technical Information of China (English)

    Mingshun Liu; Haixiang Gao; Xiaomei Fu; Po Ma

    2007-01-01

    Objectives: To explore applied value on CT and BA in diagnosis of patients with atherothrombotic brain infarction. Methods:CT and BA were examined in 246 patients with atherothrombotic brain infarction. Results:The different change of CT and BA were showed in 246 patients with atherothrombotic brain infarction. Conclusions: There were separately different advantage and shortcoming in CT and BA in diagnosis of atherothrombotic brain infarction. The value of clinical application of BA was important in diagnosis of atherothrombotic brain infarction.

  12. Electronic structure and magnetism in BaMn2As2 and BaMn2Sb2

    Energy Technology Data Exchange (ETDEWEB)

    An, Jiming [ORNL; Safa-Sefat, Athena [ORNL; Singh, David J [ORNL; Du, Mao-Hua [ORNL

    2009-01-01

    We study the properties of ThCr{sub 2}Si{sub 2} structure BaMn{sub 2}As{sub 2} and BaMn{sub 2}Sb{sub 2} using density functional calculations of the electronic and magnetic properties as well as experimental measurements on single crystal samples of BaMn{sub 2}As{sub 2}. These materials are local moment magnets with moderate band gap antiferromagnetic semiconducting ground states. The electronic structures show substantial Mn-pnictogen hybridization, which stabilizes an intermediate spin configuration for the nominally d{sup 5} Mn. The results are discussed in the context of possible thermoelectric applications and the relationship with the corresponding iron/cobalt/nickel compounds Ba(Fe,Co,Ni){sub 2}As{sub 2}.

  13. Historical and social aspects of halitosis Los aspectos históricos y sociales de halitosis Aspectos históricos e sociais da halitose

    Directory of Open Access Journals (Sweden)

    Marina Sá Elias

    2006-10-01

    Full Text Available Buccal odors have always been a factor of concern for society. This study aims to investigate the historical and social base of halitosis, through systematized research in the database BVS (biblioteca virtual em saúde - virtual library in health and also in books. Lack of knowledge on how to prevent halitosis allows for its occurrence, limiting quality of life. As social relationships are one of the pillars of the quality of life concept, halitosis needs to be considered a factor of negative interference. Education in health should be accomplished with a view to a dynamic balance, involving human beings' physical and psychological aspects, as well as their social interactions, so that individuals do not become jigsaw puzzles of sick parts.Los olores bucales siempre han sido un factor de preocupación para la sociedad, y ellos todavía son ahora. El objetivo de este estudio es hacer una base histórica y social en la halitosis. Fue efectuada una investigación sistematizada en la base de datos BVS (biblioteca virtual em saúde - la biblioteca virtual en salud y también en los libros. La ignorancia en cómo prevenir la halitosis permite su ocurrencia, que limita la calidad de vida. Siendo las relaciones sociales uno de los pilares del concepto de calidad de vida, es necesario considerar la halitosis un factor de interferencia negativa. La educación en salud se debe llevar a cabo buscando un equilibrio dinámico, involucrando los aspectos físicos y psicológicos del ser humano, así como sus interacciones sociales, para que los individuos no se vuelvan rompecabezas de partes enfermas.O problema referente aos odores bucais sempre foi fator de preocupação para a sociedade e ainda hoje se mostra presente. O objetivo do presente estudo foi realizar um embasamento histórico e social sobre a halitose. Para tanto, foi feita busca sistematizada, selecionando artigos por meio da base de dados BVS (Biblioteca Virtual em Saúde e também pesquisa em

  14. El profesional de la información digital: aspectos organizativos

    OpenAIRE

    Muñoz de Solano y Palacios, Bárbara

    2006-01-01

    La preservación digital es un aspecto de singular relevancia en nuestros días. No sólo por tratarse de la responsabilidad de personas que desempeñan roles muy diversos en las instituciones si no también por ser una actividad crucial a la ho-ra de identificar qué facetas de la tecnología digital son susceptibles de control a raíz de los conocimientos que se tienen en materia de preservación digital. El presente artículo establece la relación de aquellos elementos que son necesarios para la com...

  15. Aspectos energéticos da teoria cinética dos gases

    OpenAIRE

    Robert Saraiva Matos; Roberto de Carvalho Barros

    2014-01-01

    Neste artigo, discutem-se aspectos energéticos relacionados à Teoria Cinética dos Gases (TCG). Trata-se de um estudo de revisão bibliográfica. Os dados foram coletados através do levantamento das fontes, por meio de textos técnicos, publicações científicas e livros didáticos. Através da interpretação energética da TCG foi possível discutir a rota para o equilíbrio térmico, a transferência de partículas entre níveis de energia devido à variação na temperatura e também demonstrar a distribuiçã...

  16. Aspectos generales sobre la elaboración del licor de limón

    Directory of Open Access Journals (Sweden)

    Arlyn Reyes-Linares

    2011-01-01

    Full Text Available Se presenta una revisión bibliográfica sobre el licor de limón (limoncello. Se abordan aspectos generales de esta temática, así como las materias primas que se emplean en su elaboración y los procesos de obtención. Se comentan los trabajos reportados relacionados con el licor de limón, los que muestran investigaciones sobre la composición, su caracterización para establecer la calidad del producto en el mercado y las posibles adulteraciones, así como el proceso de producción tradicional y una nueva tecnología de innovación de extracción sólido-líquido para la obtención de este licor.

  17. Contabilidade: aspectos relevantes da epopéia de sua evolução

    OpenAIRE

    Sérgio de Iudícibus; Eliseu Martins; L. Nelson Carvalho

    2005-01-01

    Trata o presente ensaio, como objetivo principal, de aspectos relevantes da epopéia da evolução da Contabilidade, através das várias fases históricas de seu desenvolvimento, desde o estado de simples método de escrituração baseado nas partidas dobradas até sua maturação como ciência social aplicada de forte fundo econômico. Ao longo do trabalho são analisados os vários enfoques, abordagens e teorias, bem como circunstâncias históricas e outras que possam explicar a Contabilidade enquanto ciên...

  18. Aspectos teóricos para el estudio sociodemográfico del embarazo adolescente

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    Humberto Gónzalez Galbán

    2000-01-01

    Full Text Available El embarazo adolescente se presenta como un tópico de interés en una buena parte de los países del mundo actualmente. Ello se explica tanto por la gran incidencia que tiene en numerosas regiones como por las implicaciones sociales, familiares y personales a que es vinculado. Esta situación ha motivado la realización de investigaciones en las que las gestaciones en edades tempranas son centro de atención, sin embargo, en estos estudios el tema es presentado generalmente de manera inadecuada. En este articulo se retoma, desde el punto de vista sociodemográfico, el análisis de aspectos teóricos sobre el embarazo adolescente, presentando críticamente la forma en que es problematizado, así como los diferentes supuestos que es posible encontrar en la literatura especializada sobre el tema.

  19. ASPECTOS PSICODINÁMICOS DEL JUEGO PATOLÓGICO: UN CASO

    Directory of Open Access Journals (Sweden)

    Sarith Ileana Jalil Pérez

    2015-01-01

    Full Text Available El juego patológico es un trastorno mental caracterizado por conductas repetitivas de juego,las cuales pueden producir un deterioro en la vida social, profesional y familiar. Este trabajo seenfoca en el origen psicoanalítico de dicho trastorno, modelo que fue el primero en plantearloe intentó darle una explicación. Se discute un caso de una mujer que acudió a consulta porsíntomas depresivos, saliendo a flote posteriormente el juego patológico. Tras llevarse a cabouna evaluación psicodinámica, se describe cada una de las primeras consultas, y finalmente sediscuten los aspectos psicoanalíticos del juego patológico.

  20. Aspectos morfológicos da terminologia da nanociência e nanotecnologia

    Directory of Open Access Journals (Sweden)

    Joel Sossai Coleti

    2010-12-01

    Full Text Available Neste artigo, descrevem-se e analisam-se os aspectos morfológicos do conjunto de termos mais frequentes da terminologia da Nanociência e Nanotecnologia, de forma a cooperar com a fixação e maior compreensão da terminologia da Nanociência e Nanotecnologia, áreas centrais das atividades de pesquisa, desenvolvimento e inovação no mundo todo, como também enriquecer a descrição morfológica do português a partir de um léxico especializado, de maneira a contribuir com o refinamento de conhecimento linguístico útil para aplicação em sistemas híbridos de extração automática de terminologias (aqueles que combinam métodos estatísticos e conhecimento linguístico considerados mais eficazes.

  1. Oestrosis. Aspectos Biológicos de la miasis cavitaria ovina

    Directory of Open Access Journals (Sweden)

    Héctor M. Puebla Domínguez

    2005-09-01

    Full Text Available En el trabajo se hace referencia a los aspectos biológicos de la miasis cavitaria ovina (oestrus ovis. La entidad parasitaria se enriquece con las últimas informaciones disponibles en internet procedentes de numerosas investigaciones realizadas por otros colegas en el mundo. Nuestro país fue afectado por un brote de la enfermedad, la cual fue reportada en la provincia de Guantánamo en la zona de yacabo abajo del municipio de Imías. Se realizaron investigaciones clínico-anatomopatológicas en el período de 1995-2002. El laboratorio provincial de Guantánamo recibió 949 muestras procedentes del sector estatal y privado para su estudio. En el departamento de parasitología se clasificaron los diferentes estadios larvarios del parásito, utilizando la clave de (lapage, 1975.

  2. A imagem do Brasil no discurso do New York Times. Aspectos sociais

    Directory of Open Access Journals (Sweden)

    Maria Inez Mateus Dota

    2010-01-01

    Full Text Available Este texto presenta un análisis de las noticias publicadas en el periódico The New York Times, versión digital, entre los meses de enero y junio de 2004. Al relacionarlas con los aspectos sociales del Brasil se intenta ver cuál es la imagen que ese periódico muestra del Brasil. El artículo adopta como fundamentos teóricos y metodológicos el análisis del discurso, principalmente las contribuiciones de Bell (1991, Fairclough (1995 y 2001, Fowler (1991 y Sousa (2004, discute las estrategias discursivas usadas para representar al Brasil y examina qué elementos escoge y los recursos de lenguaje que son empleados para la producción de los textos analizados.

  3. Aspectos psicológicos en el cáncer ginecológico

    Directory of Open Access Journals (Sweden)

    María Eugenia Olivares Crespo

    2004-01-01

    Full Text Available En el presente trabajo se abordan los aspectos psicológicos concomitantes a la patologíaoncológica ginecológica. De forma habitual estas pacientes están sometidas a diferentes modalidadesterapéuticas que provocan efectos acumulativos. En términos generales, el tratamiento deelección es quirúrgico, principalmente mastectomía e histerectomía. Estos tratamientos quirúrgicosprovocan efectos antes, durante y después de los mismos. Entre los que cabe citar: alteraciones sexuales, cambios en la imagen corporal, infertilidad y menopausia inducida. Para concluir, seespecifican los procedimientos terapéuticos psicológicos del proceso, tanto del diagnóstico como deltratamiento quirúrgico y de los efectos derivados del mismo.

  4. ASPECTOS SEMÁNTICOS EN LOS ENTORNOS VIRTUALES DE FORMACIÓN

    Directory of Open Access Journals (Sweden)

    Ana Vanessa Leguízamo León

    2010-07-01

    Full Text Available La semántica es un elemento necesario en cualquier actividad de aprendizaje, independientemente del contexto en el que nos encontremos. Los entornos virtuales de formación, como instituciones sociales mediadas por tecnología, tienen también una semántica asociada, que muchas veces es poco valorada por las personas que los diseñan. El componente semántico en estos entornos facilita la negociación de significados, que debe ocurrir para que los estudiantes puedan apropiarse de conocimiento y asociarlo con alguno de los patrones semánticos que ya posee, o crear uno nuevo. Se muestran aquí los aspectos semánticos que deben estar presentes en los entornos virtuales de formación, para situar al estudiante en el contexto semántico propuesto por el docente y que lo conduzca a un aprendizaje significativo.

  5. La dispepsia funcional: Aspectos biopsicosociales, evaluación y terapia psicológica

    Directory of Open Access Journals (Sweden)

    Stefano Vinaccia Alpi

    2008-09-01

    Full Text Available Se abordan los aspectos conceptuales del trastorno gastrointestinal Dispepsia funcional (DP, en lo que se refiere a su definición, prevalencia, clasificación y diagnóstico.; las causas y consecuencias de la DF desde una perspectiva biopsicosocial (variables socioeconómicas, demandas psicosociales, evaluación cognitiva y estrategias de afrontamiento, personalidad y comportamiento, mecanismos psicobiológicos, calidad de vida, tratamiento y evolución; la evaluación psicológica de la DF desde la perspectiva procesual; y la intervención psicológica, con énfasis en el enfoque cognitivo conductual.

  6. Aspectos morfofisiológicos das cultivares de cafeeiro Catuaí-Vermelho e Conilon

    Directory of Open Access Journals (Sweden)

    Carvalho Luciana Marques de

    2001-01-01

    Full Text Available O objetivo deste trabalho foi comparar cafeeiros das espécies Coffea arabica L. cv. Catuaí-Vermelho e C. canephora Pierre cv. Conilon quanto à fotossíntese líquida e a aspectos da anatomia foliar a esta relacionados. Verificaram-se taxas fotossintética líquida, transpiratória e de condutância estomática maiores em plantas de C. canephora. As plantas de C. arabica apresentaram menor eficiência do sistema "antena", e folhas menores, porém mais espessas. As duas espécies diferiram, ainda, quanto ao tipo, dimensões e número dos estômatos presentes na epiderme foliar: paracíticos em C. arabica e actinocíticos em C. canephora, e maiores, mas em menor número, em C. arabica.

  7. Aspectos interculturales de la reforma del sistema de salud en Bolivia

    Directory of Open Access Journals (Sweden)

    Susana Ramírez Hita

    2014-10-01

    Full Text Available Este artículo es una reflexión sobre cómo la interculturalidad entendida como el camino para mejorar la salud de la población boliviana, unida al concepto de vivir bien, no está contribuyendo a la mejora de la calidad de vida y de salud de las poblaciones más vulnerables del país. El discurso va unido a la intención de salvar la vida en su más amplio sentido, sin embargo, para ello es necesario la toma de decisiones sobre la salud ambiental y la política extractivista que no son tomados en cuenta en los problemas de salud que afectan a las pueblos indígenas, población a la que se dirigen los aspectos interculturales de la reforma de salud.

  8. Métodos de reproducción asistida: aspectos psicológicos

    Directory of Open Access Journals (Sweden)

    Kattia Escalante Barboza

    2003-03-01

    Full Text Available Los aspectos psicológicos relacionados con los tratamientos de Reproducción Asistida refieren necesariamente a dos temas muy importantes: - La forma en que se afecta la relación de pareja cuando se diagnostica la infertilidad o la esterilidad, y las emociones que surgen en el proceso de confrontación del problema. - El esquema de tratamiento o acompañamiento "psicológico que debe darse de manera paralela al tratamiento médico.Psychological aspects related to assisted reproduction treatments refer, necessarily, to two very important topics: - The way in which sterility or infertility diagnosis affect the couple's relationship and the emotions that develop from those problems. - The treatment or psychological assistance that should be given parallel to the medical treatment.

  9. TRANSPORTE PÚBLICO DO MUNICÍPIO DE NATAL: aspectos de parafiscalidade do caso SETURN

    Directory of Open Access Journals (Sweden)

    Manoel Damião Machado da Silva

    2015-12-01

    Full Text Available A proposta deste trabalho é compreender como os aspectos da gestão parafiscal do Sindicato das Empresas de Transporte Urbano de Passageiros do Município do Natal – SETURN contribuem para a eficiência do transporte público e para a melhoria a mobilidade urbana, visando contribuir na qualidade de vida da população local. A pesquisa foi desenvolvida no Sindicato, baseada no estudo de caso, por meio de entrevista semiestruturada, onde foram feitas análises, com o objetivo de descrever a situação do transporte coletivo relativo à eficiência que, na visão da pesquisa, fica comprometida, uma vez que os automóveis particulares disputam o mesmo espaço nas vias, juntamente com os transportes coletivos, impedindo assim, agilidade nas viagens.

  10. Aspectos Psicológicos y Neurales en el Aprendizaje del Reconocimiento de Emociones

    Directory of Open Access Journals (Sweden)

    Mauricio A. González

    2006-07-01

    Full Text Available El objetivo de este trabajo es sintetizar la información disponible sobre el aprendizaje del reconocimiento de emociones, tanto en sus aspectos psicológicos como neurales, con miras al desarrollo de un modelo de aprendizaje emocional que permita orientar la investigación aplicada a mejorar el desempeño social de las personas. La manera en que se aprende el reconocimiento no está ajena a la discusión sobre la naturaleza de las emociones y sobre sus correlatos neurales. Se revisan los aportes desde una perspectiva puramente psicológica y desde la neurociencia. Se concluye que existe bastante afinidad entre ambas fuentes y que la información disponible permite sistematizar un modelo basado en la (reeducación de los procesos atencionales y en feedback de las diferentes manifestaciones de la respuesta emocional.

  11. La analgesia epidural en el parto. Aspectos prácticos.

    Directory of Open Access Journals (Sweden)

    Miguel Picot Castro

    2012-08-01

    Full Text Available Es mucha la literatura científica relacionada con la analgesia epidural (AE durante el trabajo de parto. La mayor parte dirigida a estudiar consecuencias, efectos secundarios o complicaciones de su uso. El objetivo de esta revisión es ofrecer una visión actualizada de la bibliografía centrándonos en aquellos aspectos prácticos que podrían suponer cambios en las actuaciones diarias de las matronas basados en el conocimiento científico.Objetivo principal: El objetivo de esta revisión es ofrecer una visión actualizada de la evidencia científica, centrándonos en aquellos aspectos prácticos que podrían suponer cambios en las actuaciones diarias de las matronas Metodología: Se ha llevado a cabo la revisión consultando las siguientes bases de datos biomédicas: Cuiden, PubMed y Cochrane.Resultados principales: Se detallan a continuación prácticas habituales llevadas a cabo por las matronas no avaladas por la evidencia científica y se describen las prácticas más recomendables en relación con el uso de la analgesia epidural durante el trabajo de parto.Conclusión principal: El conocimiento por parte de la matrona de la evidencia científica en relación al uso de analgesia epidural durante el trabajo de parto, puede disminuir el número de intervenciones innecesarias así como la aparición de complicaciones tanto maternas como fetales.

  12. CHARACTERISTICS OF BACTERIOCIN BA28 PRODUCED BY Pediococcus acidilactici BA28

    Directory of Open Access Journals (Sweden)

    Kaur Baljinder

    2013-01-01

    Full Text Available Peptic ulcers are produced by an imbalance between gastro-duodenal mucosal defense mechanisms and damaging forces of gastric acid and pepsin, combined with superimposed injury from environmental or immunologic agents. Most common symptoms of peptic ulcer disease are abdominal discomfort, gnawing ache, occurs 2 to 3 hours after meal, other symptoms includes weight loss, poor appetite, bloating, nausea, vomiting etc. Some time duodenal wall perforates; bleeding due to the ulcer breaks blood vessels and obstructs the path of food trying to leave the stomach. Various studies have shown the association of Helicobacter pylori with peptic ulcers. Probiotic lactic acid bacteria are proposed to cure peptic ulcers by reducing colonization of H. pylori with stomach wall and by eradicating already established infection. A bacteriocin producing probiotic strain of P. acidilactici BA28 was evaluated for its antimicrobial activity against a number of Gram-positive and Gram-negative pathogens. Bacteriocin BA28 was partially purificated and characterized following in vitro assays. Preliminary investigations against H. plyori have suggested its effectiveness against peptic ulcer disease and therefore could be exploited to develop novel therapeutics.

  13. USO DE ÁLCOOLE/OU DROGAS: AVALIAÇÃO DOS ASPECTOS DA ESPIRITUALIDADE E RELIGIOSOS

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    Angelica Martins de Souza Gonçalves

    2014-01-01

    Full Text Available El estudio tiene por objetivo validar aspectos de espiritualidad y religiosos en usuarios de alcohol y/o drogas. Se trata de un estudio descriptivo exploratorio, de abordaje cuantitativo. Participaron 138 individuos de sexo masculino, vinculados a instituciones para rehabilitación o grupo de mutua ayuda, que respondieron a un cuestionario sociodemográfico, AUDIT-C y la versión brasileña de la Spirituality Self Rating Scale. En la muestra, 47,1% eran usuarios de alcohol y 52,9% de drogas. Los resultados constataron diferencias entre os grupos en relación a los aspectos religiosos: los usuarios de alcohol eran católicos (63,1% e no practicantes de religión (50,8% y los usuarios de drogas eran evangélicos (43,1% e practicaban una religión (72,2%. En relación a los aspectos das prácticas espirituales, no fueran encontradas diferencias entre los grupos. Ambos demostraron hacer distinción entre los conceptos de religiosidad e de espiritualidad. Los resultados amplían la comprensión sobre cómo el enfermero pode implementar o cuidado que leva en consideración los aspectos subjetivos de usuario de substancias psicoactivas en su práctica cotidiana.

  14. Contrast study on CT and BA in cerebral hemorrhage due to hypertension%CONTRAST STUDY ON CT AND BA IN CEREBRAL HEMORRHAGE DUE TO HYPERTENSION

    Institute of Scientific and Technical Information of China (English)

    Mingshun Liu; Guoqiu Wang; Po Ma

    2007-01-01

    Objectives:To explore contrast application on CT and BA in cerebral hemorrhage due to hypertension. Methods: CT and BA were examined in 106 patients with cerebral hemorrhage due to hypertension. Results:The different changes of CT and BA were showed in 106 patients with cerebral hemorrhage due to hypertension. Conclusions: There were separately different advantage and shortcoming in CT and BA in diagnosis of cerebral hemorrhage due to hypertension. The value of clinical application of BA was important in cerebral hemorrhage due to hypertension.

  15. An approach to WWER fuels with BaCo

    International Nuclear Information System (INIS)

    BaCo is a code for the simulation of the behaviour of a nuclear fuel rod under operation conditions. BaCo, a quasi 2D code based on a finite differences scheme, has been used for simulating PHWR, CANDU, PWR, BWR, MOX, WWER, and experimental fuel rods. We improve the performance of BaCo with a set of tools based on the method of finite elements for 3D analysis of the stress-strain state. We can simulate any UO2 pellet geometry. Standard WWER-440 fuel assemblies irradiated in the Kola-3 reactor of the CRP FUMEX II of the IAEA were the first WWER simulations with BaCo. We find a very good agreement among our calculations, the experimental results and other qualified fuel codes. We present the BaCo code and our results for PWR and WWER fuels of the CRP FUMEX II, the 3D analysis of WWER fuel pellet and the projections of these results with the Argentinean nuclear fuels development. (authors)

  16. PREPARATION OF BaSO4 NANOCRYSTALS BY CONTROLLED PRECIPITATION

    Institute of Scientific and Technical Information of China (English)

    Junping Li; Yao Xu; Dong Wu; Yuhan Sun

    2003-01-01

    @@ Due to their size-dependent properties and flexible processing chemistry (Alivisatos, 1996), monodispersed nanocrystals have attracted considerable attention for their distinguished role in fundamental studies and technical applications. Although much has been reported on fabrication of monodispersed inorganic nanocrystals such as Fe2O3, CdSe, PbSe and ZrO2 (Peng & Peng, 2002;Zhu et al., 2002; Niederberger et al., 2002; Pang et al.,2001), little published on the preparation of BaSO4 nanocrystals and their crystal size and morphology which affect their performance in application. Polymer additives with complex functions have been used as templates to direct oriented nucleation and growth of BaSO4 (Xiao et al.,2001; Yu et al., 2002; Summers et al., 2002), as a new class of functional polymers, the so-called double-hydrophilic block copolymers, designed to control the morphology of BaSO4 (Colfen et al., 2002), including their nanofibers synthesized in AOT microemulsion (Li & Mann,2000). Though so much research has been devoted to controlling the BaSO4 morphologies, the present note will report on the synthesis of BaSO4 nanocrystals with size controlling.

  17. Thermochemical study of the molecule BaC2

    International Nuclear Information System (INIS)

    The enthalpy of the reaction Ba(g)+2C(graph.) = BaC2(g) has been determined by Knudsen effusion mass spectrometry over a barium alloy with noble metals contained in a graphite cell. The value ΔH/sup circle-open/0 = 252.5 +- 11.5kJ mol-1 has been obtained from second- and third-law evaluations of the equilibrium vapor in the temperature range 1778--2286 K. This reaction enthalpy has been combined with ancillary literature data to derive the following thermodynamic properties in kJ mol-1 of gaseous BaC2: the atomization energy, Δ/sub at/H/sup circle-open/0 , 1180.9 +- 12.2; the standard heat of formation, Δ/sub f/H/sup circle-open/298 , 437.1 +- 14.2; the enthalpy of sublimation of BaC2(s), Δ/sub sub/H/sup circle-open/298 , 511.2 +- 17.1; and the bond dissociation energy, D/sup circle-open/0 (Ba--C2), 581.7 +- 14.8. The results are discussed with regard to their possible significance in reactor technology

  18. Radioactive contamination of BaF2 crystal scintillator

    Directory of Open Access Journals (Sweden)

    Belli P.

    2014-01-01

    Full Text Available Barium fluoride (BaF2 crystal scintillators are promising detectors to search for double beta decay processes in 130Ba (Q2β = 2619(3 keV and 132Ba (Q2β = 844(1 keV. The 130Ba isotope is of particular interest because of the indications on 2β decay found in two geochemical experiments. The radioactive contamination of BaF2 scintillation crystal with mass of 1.714 kg was measured over 113.4 hours in a low-background DAMA/R&D set-up deep underground (3600 m w.e. at the Gran Sasso National Laboratories of INFN (LNGS, Italy. The half-life of 212Po (present in the crystal scintillator due to contamination by radium was estimated as T1/2 = 298.8 ± 0.8(stat. ± 1.4(syst. ns by analysis of the events pulse profiles.

  19. Nem tudo que parece ser, é lesão: aspectos anatômicos, não lesões, artefatos, lesões sem significado clínico e alterações post mortem encontrados na necropsia de suínos domésticos e selvagens (Sus scrofa

    Directory of Open Access Journals (Sweden)

    Raquel R. Rech

    2013-10-01

    Full Text Available A interpretação das alterações encontradas na necropsia é uma etapa importante para o sucesso do diagnóstico final. Este trabalho tem como objetivo descrever e ilustrar os aspectos anatômicos, não lesões, artefatos, lesões sem significado clínico e alterações post mortem encontradas em suínos domésticos e selvagens. Além disso, também se recomenda técnicas de colheita de tecidos para o diagnóstico de doenças que acometem essa espécie. Os principais aspectos anatômicos e não lesões descritos são fímbrias linguais, quadrilátero esofágico, toro pilórico e demarcação do padrão lobular do fígado (sistema gastrintestinal; tonsilas do palato mole, tecido linfoide associado ao estômago, placas de Peyer do intestino delgado e dobras da margem do baço (sistema hematopoiético; mediastino proeminente do testículo e aréolas da placenta (sistema reprodutor; atelectasia pulmonar e apêndice decidual (feto; e glândulas carpais (sistema tegumentar. Os artefatos de eutanásia abordados são petéquias na superfície do pulmão e rim, falsa anemia por sangria, hemorragia subdural por concussão cerebral, pseudo-infartos do baço e aspecto cerebriforme do intestino delgado. As lesões de pouco significado clínico descritas são cistos renais, linfonodos com pigmento de ferro, papilomas e hemangiomas no escroto, ossos no mesentério e hiperemia da mucosa gástrica. As alterações post mortem comumente encontradas são livor mortis, músculos pálidos, pseudomelanose e líquido serosanguinolento nas cavidades torácica e abdominal em fetos.

  20. Left posterior BA37 is involved in object recognition: a TMS study

    DEFF Research Database (Denmark)

    Stewart, Lauren; Meyer, Bernd-Ulrich; Frith, Uta;

    2001-01-01

    . Four conditions were investigated: word and nonword reading, colour naming and picture naming. Repetitive transcranial magnetic stimulation (rTMS) was delivered over posterior BA37 of the left and right hemispheres (lBA37 and rBA37, respectively) and over the vertex. divisions were significantly slower...... to name pictures when TMS was given over lBA37 compared to vertex or rBA37. rTMS over lBA37 had no significant effect on word reading, nonword reading or colour naming. The picture naming deficit is suggested to result from a disruption to object recognition processes. This study corroborates the...

  1. Synthesis of BaTiO3 nanoparticles from TiO2-coated BaCO3 particles derived using a wet-chemical method

    Directory of Open Access Journals (Sweden)

    Yuuki Mochizuki

    2014-03-01

    Full Text Available BaCO3 particles coated with amorphous TiO2 precursor are prepared by a wet chemical method to produce BaTiO3 nanoparticles at low temperatures. Subsequently, we investigate the formation behavior of BaTiO3 particles and the particle growth behavior when the precursor is subjected to heat treatment. The state of the amorphous TiO2 coating on the surface of BaCO3 particles depends on the concentration of NH4HCO3, and the optimum concentration is found to be in the range 0.5–1.0 M. Thermogravimetric curves of the BaCO3 particles coated with the TiO2 precursor, prepared from BaCO3 particles of various sizes, show BaTiO3 formation occurring mainly at 550–650 °C in the case of fine BaCO3 particles. However, as evidenced from the curves, the temperature of formation of BaTiO3 shifts to higher values with an increase in the size of the BaCO3 particles. The average particle size of single phase BaTiO3 at heat-treatment temperature of 650–900 °C is observed to be in the range 60–250 nm.

  2. Aspectos epidemiológicos e anatomopatológicos do hemagiossarcoma em cães: 40 casos (1965-2012

    Directory of Open Access Journals (Sweden)

    Mariana M. Flores

    2012-12-01

    Full Text Available Os aspectos epidemiológicos e anatomopatológicos de casos de hemangiossarcoma em cães da Região Central do RS foram estudados. Dos casos avaliados (n=40, cães idosos e da raça Pastor Alemão foram nitidamente os mais afetados (72,2% e 20% dos casos, respectivamente, visto que na população total de cães necropsiados nesse mesmo período (n=7.063 essa faixa etária e raça tiveram comparativamente uma prevalência bem mais baixa (14,6% e 10,1% dos casos, respectivamente. Na necropsia (n=40, os tumores ocorreram quase sempre como nódulos (92,5% e, menos frequentemente, como massas (37,5%, e afetaram principalmente: baço (62,5%, pulmão (60%, fígado (52,5%, peritônio (42,5%, rim (37,5%, encéfalo (30%, pleura (25% e coração (22,5%. Hemoperitônio (42,5% e, consequentemente, anemia (22,5% foram vistos com certa frequência. Na histologia (n=25, os hemangiossarcomas eram principalmente bem diferenciados (84%, de baixo grau (64% e com estroma escasso (84%, mas frequentemente (68% havia áreas com células demonstrando algum grau de atipia. Necrose, hemorragia e trombose foram vistos em todos os casos, mas hematopoiese extramedular (28% e proliferação angiomatosa benigna (12% foram achados menos comuns. Na imuno- -histoquímica (n=24, utilizando anticorpo anti-fator de von Willebrand, todos os casos demonstraram marcação de intensidade variável com um padrão citoplasmático finamente granular. Em relação à classificação anatômica, 55% dos hemangiossarcomas foram considerados como multicêntricos, 30% como primários com metástase(s e 15% como solitários. Esse artigo discute esses resultados e propõe, com base em combinações de órgãos afetados, um esquema de separação entre hemangiossarcomas primário com metástase(s e multicêntrico, a fim de tentar homogeneizar a maneira com que patologistas veterinários referem-se a esse neoplasma.

  3. Activity Enhancement of Pt/Ba/Al2O3 Mixed with Mn/Ba/Al2O3 for NOx Storage-reduction by Hydrogen

    Institute of Scientific and Technical Information of China (English)

    Jian Hua XIAO; Xue Hui LI; Sha DENG; Fu Rong WANG; Le Fu WANG

    2006-01-01

    Mn/Ba/Al2O3 catalyst for NO oxidation-storage and Pt/Ba/Al2O3 catalyst mixed with Mn/Ba/Al2O3 for NOx storage-reduction by hydrogen were investigated. The results showed that Mn/Ba/Al2O3 had large nitrogen oxides storage capacity (397.9 μmolg-1) under lean bum condition.When Pt/Ba/Al2O3 catalyst was mixed with Mn/Ba/Al2O3 in equal weight proportion, the NOx conversion increased between 250 ℃ and 500 ℃ under the dynamic lean-rich bum conditions, and the maximum NOx conversion increased from 95.4% to 98.2%. Mn/Ba/Al2O3 has promoted NOx storing in the lean stage and improved NOx reduction efficiency in the rich stage, these might result in higher NOx conversion over the low Pt loading content catalyst.

  4. Aspectos clínico-patológicos e controle da paratuberculose em rebanho bovino leiteiro

    Directory of Open Access Journals (Sweden)

    Elise M Yamasaki

    2010-11-01

    Full Text Available A paratuberculose ou doença de Johne é uma enterite granulomatosa causada por Mycobacterium avium subsp. paratuberculosis. Descrevem-se os aspectos epidemiológicos, clínico-patológicos e laboratoriais da paratuberculose em rebanho bovino leiteiro no município de Rio Claro, região Sul do Estado do Rio de Janeiro. No período de 2006 a 2009, oito vacas adultas da raça Girolanda apresentaram diarreia crônico-intermitente e perda progressiva de peso. À necropsia, observaram-se linfonodos mesentéricos aumentados de volume e úmidos ao corte, vasos linfáticos subserosos das alças intestinais proeminentes, serosa do intestino com aspecto anelado e cerebroide e a mucosa espessada, pregueada e com aspecto microgranular. À microscopia havia, desde o duodeno até o reto, inflamação granulomatosa difusa, marcada dilatação dos vasos linfáticos no ápice das vilosidades, linfangiectasia e linfangite granulomatosa na submucosa, muscular e serosa. A inflamação granulomatosa também foi vista nos linfonodos mesentéricos. A coloração de Ziehl-Neelsen revelou variável quantidade de bacilos álcool-ácido resistentes no interior de macrófagos, de células gigantes de Langhans e livres na mucosa e submucosa dos intestinos delgado e grosso e em linfonodos mesentéricos. Em alguns animais, a lâmina própria da mucosa, principalmente do jejuno e íleo exibia acentuada hipertrofia. Mycobacterium avium subsp. paratuberculosis foi isolado em cultivo bacteriano de Herrold com micobactina, a partir de amostras de fezes, de raspado de mucosa intestinal e de leite e identificado pela técnica de PCR IS900. Através da avaliação sorológica semestral, foram analisadas 298 vacas do mesmo rebanho a partir de três anos de idade, observou-se cerca de 40% de animais reagentes ao teste ELISA indireto no período estudado. O diagnóstico da paratuberculose foi baseado nos dados clínico-patológicos, na sorologia, no isolamento e identificação do

  5. Stellar laboratories III. New Ba V, Ba VI, and Ba VII oscillator strengths and the barium abundance in the hot white dwarfs G191-B2B and RE0503-289

    CERN Document Server

    Rauch, T; Quinet, P; Kruk, J W

    2014-01-01

    For the spectral analysis of high-resolution and high-signal-to-noise (S/N) spectra of hot stars, state-of-the-art non-local thermodynamic equilibrium (NLTE) model atmospheres are mandatory. These are strongly dependent on the reliability of the atomic data that is used for their calculation. Reliable Ba V - VII oscillator strengths are used to identify Ba lines in the spectra of the DA-type white dwarf G191-B2B and the DO-type white dwarf RE0503-289 and to determine their photospheric Ba abundances. We newly calculated Ba V - VII oscillator strengths to consider their radiative and collisional bound-bound transitions in detail in our NLTE stellar-atmosphere models for the analysis of Ba lines exhibited in high-resolution and high-S/N UV observations of G191-B2B and RE0503-289. For the first time, we identified highly ionized Ba in the spectra of hot white dwarfs. We detected Ba VI and Ba VII lines in the Far Ultraviolet Spectroscopic Explorer (FUSE) spectrum of RE0503-289. The Ba VI / Ba VII ionization equil...

  6. Thin film hybrid Josephson junctions with Co doped Ba-122

    International Nuclear Information System (INIS)

    Josephson junctions are a strong tool to investigate fundamental superconducting properties, such as gap behaviour, dependencies from external fields and the order parameter symmetry. Finding secure values enables the possibility of theoretical descriptions to understand the physical processes within the new iron-based superconductors. Based on Co-doped BaFe2As2 (Ba-122) layers produced via pulsed laser deposition (PLD) on (La,Sr)(Al,Ta)O3 substrates, we manufactured superconductor-normal conductor-superconductor (S-N-S) junctions structures by using photolithography, ion beam etching as well as insulating SiO2 layers. We present working Ba-122/Au/PbIn thin film Josephson junctions with different contact areas and barrier thicknesses, their temperature dependence and response to microwave irradiation. The calculated IcRN product is in the range of a couple of microvolts.

  7. BaH molecular spectroscopy with relevance to laser cooling

    Science.gov (United States)

    Tarallo, M. G.; Iwata, G. Z.; Zelevinsky, T.

    2016-03-01

    We describe a simple experimental apparatus for laser ablation of barium monohydride (BaH) molecules and the study of their rovibrational spectra relevant to direct laser cooling. BaH is a promising candidate for laser cooling and ultracold fragmentation, both of which are precursors to novel experiments in many-body physics and precision measurement. We present a detailed analysis of the properties of ablation plumes that can improve the understanding of surface ablation and deposition technologies. A range of absorption spectroscopy and collisional thermalization regimes has been studied. We directly measured the Franck-Condon factor of the B 2Σ+(v'=0 ) ←X 2Σ+(v''=1 ) cycling transition. Prospects for production of a high luminosity cryogenic BaH beam are outlined.

  8. Processing of R-Ba-Cu-O superconductors

    Energy Technology Data Exchange (ETDEWEB)

    Wu, H.

    1998-02-23

    Precipitation processes were developed to introduce second phases as flux pinning centers in Gd-Ba-Cu-O and Nd-Ba-Cu-O superconductors. In Gd-Ba-Cu-O, precipitation is caused by the decrease of the upper solubility limit of Gd{sub 1+x}Ba{sub 2{minus}x}Cu{sub 3}O{sub 7} solid solution (Gd123ss) in low oxygen partial pressure. Processing of supersaturated Gd{sub 1.2}Ba{sub 1.8}Cu{sub 3}O{sub 7} in low oxygen partial pressure can produce dispersed second phases. Gd211 is formed as a separate phase while extensive Gd124 type stacking fault is formed instead of a separate CuO phase. As a result of the precipitation reaction, the transition temperature and critical current density are increased. In Nd-Ba-Cu-O, precipitation is caused by the decrease of the lower solubility limit of Nd{sub 1+x}Ba{sub 2{minus}x}Cu{sub 3}O{sub 7} solid solution (Nd123ss) in oxygen. DTA results reveal the relative stability of Nd123ss in different oxygen partial pressures. In 1 bar oxygen partial pressure, Nd123ss with x = 0.1 is the most stable phase. In lower oxygen partial pressures, the most stable composition shifts towards the stoichiometric composition. The relative stability changes faster with decreasing oxygen partial pressure. Therefore, processing in oxygen and air tends to produce broad superconducting transitions but sharp transitions can be achieved in 0.01 bar and 0.001 bar oxygen partial pressures. While the lower solubility limits in 0.01 bar and 0.001 bar oxygen partial pressures remain at x = 0.00, the solubility limits in oxygen and air show a narrowing with decreasing temperature. Because of the narrowing of the solubility range in oxygen, oxygen annealing of Nd123 initially processed in low oxygen partial pressures will result in precipitation of second phases. The equilibrium second phase is BaCuO{sub 2} for temperature above 608 C, and at lower temperatures the equilibrium second phases are Ba{sub 2}CuO{sub 3.3} and Ba{sub 2}Cu{sub 3}O{sub 5+y}. However, annealing at

  9. Thermoelectric properties of Ni-doped BaSi2

    Science.gov (United States)

    Xu, Yidong; Wu, Yixuan; Chen, Zhiwei; Shen, Wenjia; Jian, Zhengzhong; Lin, Siqi; Li, Juan; Li, Wen; Pei, Yanzhong

    2016-01-01

    BaSi2 has been known as a wide gap semiconductor with an intrinsic low lattice thermal conductivity, therefore may be a promising environmental friendly thermoelectric (TE) material with abundant constituent elements. In this work, NixBa1-xSi2 compounds with 0≤x≤0.3 are synthesized by arc melting. The resistivity, thermal conductivity and Seebeck coefficient are measured in the temperature range of 300-850K. The resistivity of the undoped BaSi2 is as high as 480mOhmṡcm at room temperature. Through Ni-doping, both resistivity and the Seebeck coefficient decrease dramatically. Meanwhile, the total thermal conductivity has no apparent difference due to Ni-doping. The lattice thermal conductivity decreases with increasing temperature monotonously to be lower than 1W/mṡK at high temperatures.

  10. BaCo2(AsO42

    Directory of Open Access Journals (Sweden)

    Tamara Đordević

    2008-09-01

    Full Text Available Suitable single crystals of the title compound, barium dicobalt(II bis[orthoarsenate(V], were prepared under hydrothermal conditions. This phase belongs to a series of compounds with general formula AM2(XO42, where A = alkaline earth metal, M = Mg or a divalent first-row transition element, and X = P, As or V. BaCo2(AsO42 is isotypic with BaNi2(XO42 (X = P, V or As and is characterized by brucite-like sheets of edge-sharing CoO6 octahedra (3 symmetry parallel to (001, with one-third of the octahedral positions being vacant. The sheets are capped above and below by AsO4 tetrahedra (3 symmetry and are interconnected by distorted BaO12 cuboctahedra (overline{3} symmetry.

  11. Dynamic moments of inertia in Xe, Cs and Ba nuclei

    International Nuclear Information System (INIS)

    The γ-rays following the reactions induced by 12C ions on 115In, 112Sn, 117Sn, 122Sn and 123Sb targets have been investigated using six NaI(Tl) detectors in a two-dimensional arrangement. The collective moment of inertia Isub(band)sup((2)) of 118Xe, 122Xe, 123Cs and 128Ba, 130Ba have been extracted from the energy-correlation spectra. The behaviour of these nuclei and the observed differences are interpreted in terms of high-spin collective properties. Data are also presented on the effective moment of inertia Isub(eff)sup((2)) of 118Xe and 130Ba measured by sum-spectrometer techniques

  12. AMiBA: Array for Microwave Background Anisotropy

    Science.gov (United States)

    Lo, K. Y.; Chiueh, T. H.; Martin, R. N.; Ng, Kin-Wang; Liang, H.; Pen, Ue-Li; Ma, Chung-Pei

    An Array for Microwave Background Anisotropy (AMiBA) is being built to measure the polarization of the CMB and to survey for high z clusters via the Sunyaev-Zeldovich effect (SZE). AMiBA is a platform mounted 19-element interferometer operating between 85 - 105 GHz, with full polarization capabilities. The aperture size of the elements can be changed between 0.3m and 1.2m, in order to provide a range of fields of view and l-resolution. The platform size is about 10-m so that the resolution can be as high as 1 arc-minute. The sensitivity can be as low as 2 mJy and 7 μK in an hour. The array is to be placed on Mauna Kea in Hawaii or in the Atacama desert in Chile, and is scheduled to be completed in 2003. The current status of AMiBA will be described.

  13. The BaBar instrumented flux return performance: lessons learned

    CERN Document Server

    Anulli, F; Baldini, R; Band, H R; Bionta, R; Brau, J E; Brigljevic, V; Buzzo, A; Calcaterra, A; Carpinelli, M; Cartaro, C; Cavallo, N; Crosetti, G; De Nardo, Gallieno; De Sangro, R; Eichenbaum, A; Fabozzi, F; Falciai, D; Ferrarotto, F; Ferroni, F; Finocchiaro, G; Forti, F; Frey, R; Gatto, C; Graug; Iakovlev, N I; Iwasaki, M; Johnson, J R; Lange, D J; Lista, L; Lo Vetere, M; Lü, C; Macri, M; Messner, R; Moore, T B; Morganti, S; Neal, H; Neri, N; Palano, A; Paoloni, E; Paolucci, P; Passaggio, S; Pastore, F C; Patteri, P; Peruzzi, I; Piccolo, D; Piccolo, M; Piredda, G; Robutti, E; Roodman, A; Santroni, A; Sciacca, C; Sinev, N B; Soha, A; Strom, D; Tosi, S; Vavra, J; Wisniewski, W J; Wright, D M; Xie, Y; Zallo, A

    2002-01-01

    The BaBar Collaboration has operated an instrumented flux return (IFR) system covering over 2000 m sup 2 with resistive plate chambers (RPCs) for nearly 3 years. The chambers are constructed of bakelite sheets separated by 2 mm. The inner surfaces are coated with linseed oil. This system provides muon and neutral hadron detection for BaBar. Installation and commissioning were completed in 1998, and operation began mid-year 1999. While initial performance of the system reached design, over time, a significant fraction of the RPCs demonstrated significant degradation, marked by increased currents and reduced efficiency. A coordinated effort of investigations have identified many of the elements responsible for the degradation. This article presents our current understanding of the aging process of the BaBar RPCs along with the action plan to combat performance degradation of the IFR system.

  14. Exotic decay in Ba isotopes via 12C emission

    Indian Academy of Sciences (India)

    K P Santhosh; Antony Joseph

    2000-09-01

    Considering Coulomb and proximity potentials as barriers, we have calculated the half lives for 12C emission from various Ba isotopes using different mass tables. The half life for 112Ba isotope calculated by us is 6.020 × 103 s which is comparable with the experimental value 5.620 × 103 s. From our study it is found that 114Ba is the good parent for 12C emission whose emission rate is favorable for measurement. The half lives predicted by us lie very close to those reported by Shanmugam et al using their cubic plus Yukawa plus exponential model. It is observed that inclusion of proximity potential does not produce significant deviation from the linear nature of the Geiger–Nuttall plots. Also it is found that the neutron excess in the parent nuclei slows down the exotic decay process.

  15. Preparation of Ba target with molecular plating method

    International Nuclear Information System (INIS)

    The thin films of Ba are prepared by electro-deposition from the isopropyl-HCl mixture with a platinum wire as anode and a stainless steel plate as cathode. The influence of current density and deposition time on deposition efficiency of barium is studied. The activities of 133Ba tracer are measured by a HPGe detector to determine the deposition yield of barium. The results show that uniform and adhering films of barium are obtained on stainless steel foils by molecular plating method, and the thickness of Ba films is 0.5-1.0 mg/cm2 under the conditions of the current density of 4-6 mA/cm2 and the deposition time of about 30 min

  16. Ba3GeS5 and Ba3InS4Cl: Interesting size effects originated from the tetrahedral anions

    International Nuclear Information System (INIS)

    Two new barium chalcogenides, Ba3GeS5 and Ba3InS4Cl, were synthesized by using high temperature solid-state reactions and their structures were determined by single-crystal X-ray diffraction technique. Despite the similar chemical formula, the structures of Ba3GeS5 and Ba3InS4Cl are subtly different due to the size effects originated from the tetrahedral anions. Ba3GeS5 crystallizes in the orthorhombic space group Pnma (no. 62) with cell parameters of a=12.0528(9) Å, b=9.5497(7) Å and c=8.5979(6) Å, while Ba3InS4Cl adopts a different tetragonal system (space group: I4/mcm, no. 140, a=b=8.3613(6) Å, c=14.3806(18) Å). The measured optical band gap of Ba3GeS5 is 3.0 eV, a little smaller than the value of 3.42 eV in Ba3InS4Cl. Theoretical calculations by Wien2k are provided as well in order to better understand these results. - Graphical abstract: The polyhedral structure view for Ba3GeS5 and Ba3InS4Cl in which Ba, S and Cl atoms are plotted in purple, red and green spheres. - Highlights: • Two new barium chalcogenides, Ba3GeS5 and Ba3InS4Cl, were synthesized from the BaCl2-flux reactions. • Their crystal structures feature discrete [MS4] tetrahedra which embody interesting size effects. • Both compounds exhibit a band gap around 3.0 eV. • They are thermally stable up to 1073 K

  17. Aspectos morfométricos do timo em gatos domésticos (Felis domesticus

    Directory of Open Access Journals (Sweden)

    Camila E. Barroso

    2012-12-01

    Full Text Available O timo é um órgão linfático primário que desenvolve sua atividade em organismos jovens. Apesar de sua função ser responsável por mecanismos fundamentais na aquisição das defesas e conseqüentes respostas orgânicas, ela ainda não está totalmente esclarecida, nem tampouco as bases morfológicas que respondem por tais funções, como o processo de desenvolvimento e involução do órgão. Objetivou-se analisar e caracterizar os aspectos morfológicos do timo, tais como seu tamanho e volume, e aspectos histológicos do timo em gatos, correlacionando o sexo e o desenvolvimento etário. Doze timos provenientes de fetos de gatos domésticos (Felis domesticus sem raça definida (SRD, machos e fêmeas, separados em três grupos etários. O timo apresentou-se com uma coloração rosa-pálida e com duas porções, a torácica e a cervical, sendo que cada uma delas possuía um lobo direito e um lobo esquerdo em sua maioria. A porção torácica localizava-se em região de mediastino cranial, entre os pulmões e à base do coração. E a porção cervical estendia-se além das costelas em sentido cranial, estando localizada ventralmente à traqueia. A estrutura celular do timo demonstrou-se organizada com a presença de agregados concêntricos, os chamados corpúsculos tímicos, formados por células epiteliais, sustentada por uma cápsula de tecido conjuntivo de onde partiam septos que ao penetrar no órgão dividia-o em lóbulos. Ocorreram variações significativas quanto à lobação e as dimensões do timo entre indivíduos da mesma faixa etária, e entre sexos diferentes. Os valores relativos ao comprimento, espessura e largura, de maneira geral, apresentaram aumento, em conformidade ao desenvolvimento dos animais, mas com diferenças entre os sexos.

  18. Aspectos nutricionais relacionados ao ciclo menstrual Nutritional aspects related to menstrual cycle

    Directory of Open Access Journals (Sweden)

    Helena Alves de Carvalho SAMPAIO

    2002-09-01

    Full Text Available O objetivo da presente revisão é apresentar os principais tópicos discutidos na literatura quanto à associação da nutrição com o ciclo menstrual, contribuindo para a implementação do atendimento nutricional de mulheres. São revisados aspectos referentes à fisiologia da menstruação, alterações metabólicas durante o ciclo menstrual e comportamentos alimentares associados a ele. Considerando-se o ciclo menstrual dividido em duas fases, a folicular e a lútea, é nesta última que são descritas mais alterações, como retenção de água, elevação de peso, aumento de demanda energética, modificações no perfil lipídico e no metabolismo de vitamina D, cálcio, magnésio e ferro, hipersensibilidade emocional, dores generalizadas e mudança do comportamento alimentar. Em relação a este último item, podem ocorrer maior ingestão energética e o desenvolvimento de compulsões alimentares, principalmente por chocolate, doces e alimentos muito salgados. É fundamental que todos os aspectos citados sejam investigados durante a consulta nutricional, a fim de serem adotadas condutas mais específicas.The aim of the present review is to show the most important topics discussed in literature about the association between nutrition and menstrual cycle, contributing to improve the nutritional care for women. Aspects related to physiology of the menstruation, metabolic changes and feeding behavior during the menstrual cycle are reviewed. Considering the menstrual cycle divided in two phases, follicular and luteal, it is in this last one that more alterations are described, like fluid retention, weight gain, increase in caloric needs, modifications in the lipid profile and in the metabolism of vitamin D, calcium, magnesium and iron, emotional hypersensitivity, aches and changes in feeding behavior. In relation to this last item, it can occur a higher caloric intake and the development of food cravings, mainly for chocolate, candies and

  19. Aspectos e impactos ambientais de pedreira em área urbana

    Directory of Open Access Journals (Sweden)

    Denise de La Corte Bacci

    2006-03-01

    Full Text Available O conceito de desempenho ambiental tem sido utilizado como forma para revelar as relações da empresa com o meio ambiente e com a sociedade, constituindo um parâmetro de análise da sua postura diante das questões sócio-ambientais. A avaliação dos aspectos e impactos ambientais gerados por determinada atividade é um instrumento da gestão ambiental, sendo aplicado, nesse trabalho, em uma pedreira de diabásio, na área de expansão urbana, no município de Campinas (SP. Foram avaliados os aspectos e impactos das etapas produtivas da pedreira e de suas instalações administrativas. Os impactos adversos mais significativos levantados foram a sobrepressão atmosférica e a vibração do terreno, causando desconforto à comunidade. Após tais levantamentos, algumas ações de melhoria foram implantadas pela empresa e resultaram na diminuição das reclamações por parte da comunidade; outras medidas, pró-ativas, devem ainda ser implementadas, principalmente aquelas voltadas para a prevenção de impactos negativos e a preservação do meio ambiente, além da recuperação da área degradada, como medida reativa.The concept of environmental performance has been used as a way of revealing the relationships of a company with its environment and community, and is a parameter of its posture in addressing social and environmental questions. Evaluation of the environmental impacts generated by a certain activity is one instrument of environmental management. We present a case study of a diabase quarry located in an expanding urban area in the Municipality of Campinas, State of São Paulo, Brazil. Several aspects and impacts of the different stages of production in the quarry, as well as its administrative facilities, were evaluated. The most significant adverse impacts were airblast and ground vibration disturbing the neighborhood. After the environmental monitoring, some ameliorative actions were implemented and have resulted in reduction of

  20. Aspectos psicobiológicos do comportamento alimentar Psychobiological aspects of feeding behavior

    Directory of Open Access Journals (Sweden)

    Rosana Passos Beinner Cambraia

    2004-06-01

    Full Text Available Esta revisão aborda alguns aspectos psicobiológicos ligados à manifestação do comportamento alimentar, e tem como objetivo evidenciar a relação entre os principais processos neuropsicológicos e a neurociência nutricional. Algumas estruturas neurais estão associadas ao controle alimentar por mecanismos distintos e correlatos que ocorrem no hipotálamo, hipocampo e em outras áreas como no cerebelo, bulbo olfatório, glândulas pituitária e pineal que exercem funções distintas, porém influênciam o comportamento alimentar, intermediadas geralmente por neurotransmissores comuns. Os precursores dos neuroquímicos apresentam funções específicas, sendo a influência na alimentação relevante no contexto comportamental da escolha de alimentos. Os processos sensoriais na alimentação como paladar, olfato, visão e audição interagem entre si e com outras estruturas e vias neurais, participando também do controle do apetite e da saciedade, que culminam na iniciação e no término da alimentação. A interação entre aspectos neurais no processo de consumo de alimento promove a manifestação do comportamento alimentar específico para cada espécie em seu ambiente.This review shows how some psychobiological aspects are related to feeding behavior manifestation, and has as it objective to provide evidence as to the relation between neuropsychological processes and nutritional neuroscience. Several neural structures are associated with alimentary controls, which are distinct but correlated mechanisms; for example: hypothalamus, hypocampus, cerebellum, olfactory bulb, pituitary and pineal glands, all presenting distinct functions, but affecting feeding behavior directly or indirectly through common neurotransmitters. Neurochemical precursors present specific functions and their influence on feeding is evident in behavioral food selection. The sensory processes in feeding, principally taste, olfaction, vision and hearing, interact with

  1. ASPECTOS COMPOSICIONAIS, PROPRIEDADES FUNCIONAIS, NUTRICIONAIS E SENSORIAIS DO LEITE DE CABRA: UMA REVISÃO

    Directory of Open Access Journals (Sweden)

    Danielle Barros Cenachi

    2011-10-01

    Full Text Available O objetivo deste trabalho foi realizar uma revisão de literatura sobre aspectos composicionais e propriedades funcionais, nutricionais e sensoriais do leite de cabra aplicados à sua tecnologia de processamento. A escassez de publicações contendo informações específicas sobre o leite de cabra motivou a realização deste artigo. Para a realização da revisão bibliográfica foi feita uma busca de artigos científicos nas bases de dados da SpringLink, Nature, Scientific Electronic Library Online, principalmente, acessados através do portal de periódicos da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior por intermédio do Sistema Integrado de Gestão Acadêmica da UFJF. As principais palavras-chave utilizadas como descritor do assunto foram "leite de cabra" em português, em inglês "goat milk" e em espanhol "leche de cabra". O leite de cabra tem um importante papel como fonte de cálcio, de gordura de elevada digestibilidade, de proteína de alto valor biológico e hipoalergenicidade. Comparando o leite caprino com o leite bovino em relação aos aspectos composicionais, observou-se que os leites das duas espécies são distintos. Informações específicas sobre o leite de cabra facilitam o seu processamento e desenvolvimento de novos produtos a partir deste. As propriedades nutricionais e funcionais do leite de cabra justificam sua singularidade e demonstram que o leite caprino e seus produtos representam um nicho promissor para diversificar e inovar a indústria láctea. As propriedades sensoriais relativas ao sabor e odor do leite de cabra representam dificuldades para a sua aceitação, sendo necessárias pesquisas para melhorar estas características.

  2. High spin spectroscopy in 130,131Ba

    International Nuclear Information System (INIS)

    The high spin states in 130,131Ba has been populated in the fusion evaporation reaction 122Sn(13C,4n)130,131Ba at Ebeam = 65 MeV. The experiment was carried out at the 14-UD pelletron accelerator at IUAC, New Delhi, India, which delivered 13C beam on a ∼ 1.0 mg/cm2 thick 122Sn target with Au (6.7 mg/cm2) backing. The γ decay following the reaction was studied using an array consisting of fifteen Compton suppressed clover detectors of INGA (Indian National Gamma Array) placed at angle of 32°(3-covers), 57°(2-clovers), 90°(4-clovers), 123°(2-clovers), 148°(4-clovers) with respect to the beam direction. The data were collected when two or more clover fired. Data have been analyzed using software CANDLE, INGASORT and RADWARE. Symmetric and Asymmetric matrices have been constructed using 2-fold as well as 3-fold data. Cube has also been made for 3-fold data. The γ transitions belonging to various band structure were detected using an array of fifteen Clover Germanium detector. In extension to earlier work done by R. Ma et al to study 131 Ba and D. Bazzacco et al. to study 130 Ba some of new transitions has been placed in high spin states. A few transitions connecting two negative parity bands in 130Ba has been established. Spin and parity for a band has been calculated for first time in 131Ba. The said band is interpreted in term of multi-quasiparticle configuration, based on Total Routhian Surface (TRS) calculation (author)

  3. New insights into the application of the valence rules in Zintl phases-Crystal and electronic structures of Ba7Ga4P9, Ba7Ga4As9, Ba7Al4Sb9, Ba6CaAl4Sb9, and Ba6CaGa4Sb9

    Science.gov (United States)

    He, Hua; Stoyko, Stanislav; Bobev, Svilen

    2016-04-01

    Crystals of three new ternary pnictides-Ba7Al4Sb9, Ba7Ga4P9, and Ba7Ga4As9 have been prepared by reactions of the respective elements in molten Al or Pb fluxes. Single-crystal X-ray diffraction studies reveal that the three phases are isotypic, crystallizing in the orthorhombic Ba7Ga4Sb9-type structure (space group Pmmn, Pearson symbol oP40, Z=2), for which only the prototype is known. The structure is based on TrPn4 tetrahedra (Tr=Al, Ga; Pn=P, As, Sb), connected in an intricate scheme into 1D-ribbons. Long interchain Pn-Pn bonds (dP-P>3.0 Å; dAs-As>3.1 Å; dSb-Sb>3.3 Å) account for the realization of 2D-layers, separated by Ba2+ cations. Applying the classic valance rules to rationalize the bonding apparently fails, and Ba7Ga4Sb9 has long been known as a metallic Zintl phase. Earlier theoretical calculations, both empirical and ab-initio, suggest that the possible metallic properties originate from filled anti-bonding Pn-Pn states, and the special roles of the "cations" in this crystal structure. To experimentally probe this hypothesis, we sought to synthesize the ordered quaternary phases Ba6CaTr4Sb9 (Tr=Al, Ga). Single-crystal X-ray diffraction work confirms Ba6.145(3)Ca0.855Al4Sb9 and Ba6.235(3)Ca0.765Ga4Sb9, with Ca atoms preferably substituting Ba on one of the three available sites. The nuances of the five crystal structures are discussed, and the chemical bonding in Ba7Ga4As9 is interrogated by tight-binding linear muffin-tin orbital calculations.

  4. Sorghum silage production system in Cariri, Paraíba

    OpenAIRE

    Ebson Pereira Cândido; Edgard Cavalcanti Pimenta Filho; Severino Gonzaga Neto; Edson Mauro Santos; José Fábio Paulino de Moura; Safira Valença Bispo

    2014-01-01

    The objective of this study was to characterize the sorghum farming and ensiling systems in the Cariri region of Paraíba State (Brazil), and to identify different groups of producers based on productive characteristics using frequency distributions, and principal component and cluster analyses. A total of 100 milk producers in the Caturité and Boqueirão municipalities in the dairy region of Cariri, Paraíba, were selected to fill out a questionnaire comprised of 32 questions to collect data on...

  5. The Danish Microbiology Database (MiBa) 2010 to 2013

    DEFF Research Database (Denmark)

    Voldstedlund, M; Haarh, M; Mølbak, K; Lundgren, Bettina; Andersen, Christian Østergaard; Jarløv, Jens Otto; Hansen, Dennis Schrøder; Schønheyder, Henrik Carl; Jensen, Thøger Gorm; Dessau, Ram; Møller, Jens K.; Ellermann-Eriksen, Svend; Lomborg, Steen; Prag, Jørgen Brorson; Kjældgaard, Poul; Truberg, Kjeld; Hoffmann, Steen

    2014-01-01

    The Danish Microbiology Database (MiBa) is a national database that receives copies of reports from all Danish departments of clinical microbiology. The database was launched in order to provide healthcare personnel with nationwide access to microbiology reports and to enable real-time surveillance...... of communicable diseases and microorganisms. The establishment and management of MiBa has been a collaborative process among stakeholders, and the present paper summarises lessons learned from this nationwide endeavour which may be relevant to similar projects in the rapidly changing landscape of...

  6. Development of BaSO sub 4 :Eu thermoluminescence phosphor

    CERN Document Server

    Madhusoodanan, U; Lakshmanan, A R

    1999-01-01

    A highly sensitive thermoluminescence (TL) phosphor based on BaSO sub 4 :Eu was developed following the coprecipitation technique and firing in argon atmosphere at 1123 K. Photoluminescence studies confirm that firing in argon atmosphere instead of air increased the incorporation of Eu ions in 2+ valence state. At low gamma-ray doses, its TL sensitivity is nearly 2 to 3 times higher than that of CaSO sub 4 :Dy phosphor. The other salient features of this BaSO sub 4 :Eu TL phosphor are a constant glow curve shape and a nearly linear gamma-ray dose response.

  7. BaCo2(AsO4)2

    OpenAIRE

    Tamara Đordević

    2008-01-01

    Suitable single crystals of the title compound, barium dicobalt(II) bis[orthoarsenate(V)], were prepared under hydrothermal conditions. This phase belongs to a series of compounds with general formula AM2(XO4)2, where A = alkaline earth metal, M = Mg or a divalent first-row transition element, and X = P, As or V. BaCo2(AsO4)2 is isotypic with BaNi2(XO4)2 (X = P, V or As) and is characterized by brucite-like sheets of edge-sharing CoO6 octahedra (3 symmetry) parallel to (001), with one-third o...

  8. G factor of the 21+ state in /sup 142/Ba

    International Nuclear Information System (INIS)

    The g factor of the 21+ state in /sup 142/Ba was measured using the time integral perturbed angular correlation technique. The state was populated following the β decay of mass-separated /sup 142/Cs produced by thermal neutron fission of /sup 235/U. A g factor of 0.48 +- 0.14 was measured. This result is analyzed together with previous results for /sup 144,146/Ba, using two different models: the hydrodynamic model including Greiner's correction for different proton and neutron pairing forces, and the interacting boson approximation IBA-2

  9. Observing the CMB with the AMiBA

    Science.gov (United States)

    Subrahmanyan, R.

    I discuss the capabilities and limitations of the AMiBA for imaging CMB anisotropies. Michael Kesteven (ATNF-CSIRO) has proposed drift-scanning as an observing strategy for measuring and rejecting any instrumental response that the close-packed interferometers may have to the local environment. The advantages of mosaic imaging CMB anisotropies using a co-mounted interferometric array in a drift-scanning observing mode are discussed. A particular case of mosaic imaging a sky strip using a two-element AMiBA prototype interferometer is considered and the signal-to-noise ratio in the measurement of sky anisotropy using this observing strategy is analysed.

  10. Observing the CMB with the AMiBA

    CERN Document Server

    Subramanian, R

    2001-01-01

    I discuss the capabilities and limitations of the AMiBA for imaging CMB anisotropies. Michael Kesteven (ATNF-CSIRO) has proposed drift-scanning as an observing strategy for measuring and rejecting any instrumental response that the close-packed interferometers may have to the local environment. The advantages of mosaic imaging CMB anisotropies using a co-mounted interferometric array in a drift-scanning observing mode are discussed. A particular case of mosaic imaging a sky strip using a two-element AMiBA prototype interferometer is considered and the signal-to-noise ratio in the measurement of sky anisotropy using this observing strategy is analysed.

  11. Preservative spleen surgery and hyperbaric oxygen therapy Cirurgia conservadora do baço e oxigenoterapia hiperbárica

    Directory of Open Access Journals (Sweden)

    Isabel Cristina Andreatta Lemos Paulo

    2007-01-01

    Full Text Available PURPOSE: To assess functional and morphological aspects of spleen auto-implants and of the splenic inferior pole of rats, post-operatively treated or not with hyperbaric oxygen, as well as the survival of these animals, were studied. METHODS: Seventy-eight male Wistar rats, weighing between 192 and 283 g ( 238,3 ± 9,6g, were randomly distributed into three groups: Group1-(n=20, spleen manipulation; group 2-(n=36, spleen auto-implantation; group3-(n= 22, subtotal splenectomy preserving the inferior pole. Each group was subdivided as follows: subgroup a, not submitted to hyperbaric oxygen therapy: 1a(n=10, 2a(n=21, 3a(n= 13; subgroup b, submitted to the therapy: 1b(n=10, 2b(n=15, 3b(n=9. Blood was collected pre-operatively and 11 days after surgery, for the estimation of lipids and immunoglobulins and the counting of platelets and Howell-Jolly corpuscles. The spleen and remains were taken for histological study. RESULTS: The number of surviving animals was significantly higher in groups 1(p 2. The macro and microscopic appearance in subgroup 2b were more viable than in subgroup 2a, and that of group 3 more viable than in group 2. The survival of the animals carrying their whole spleen or its inferior pole was more frequent than that of the auto-implanted animals. CONCLUSION: Functionality and viability of the whole spleen or of its inferior pole, were better than in the auto-implanted animals. Hyperbaric oxygentherapy contributed to increased survival frequency of auto -implanted animals, and to improve the functionality and viability of the auto-implants and the function of the inferior splenic pole, and did not interfere in animals carrying their whole spleen.OBJETIVO: Estudar aspectos funcionais e morfológicos dos auto-implantes esplênicos e do pólo inferior do baço de ratos, tratados ou não com oxigênio hiperbárico no pós-operatório, e a sobrevida desses animais. MÉTODOS: Foram operados 78 ratos, machos, Wistar, pesando entre 192 g

  12. Praseodymium valency from crystal structure in Pr-Ba-Cu-O and (Y-Pr)-Ba-Cu-O single crystals

    International Nuclear Information System (INIS)

    The substitution of Pr to Y leads to materials with a general formula (Y1-vPrv) (Ba2-xPrx) (Cu3-y vacy) O6+x/2-y+z and with a structural transition around v + x' ∼ 0.5. For v + x 0.5 the crystals are tetragonal, La1.5Ba1.5Cu3O7±z type, with the characteristic tri-twinning of this phase. The Pr valency, in the range 3-3.2+ depending on preparation conditions, is determined from interatomic distances. Orthorhombic crystals of Pr Ba Cu O prepared at high temperatures exhibit a high amount of defects, y ∼ 0.25 on the Cu(1) site and are semiconductors with a T-1/4 activation law attributed to the praseodymium valence fluctuation

  13. Recent updated aspects of colicins of Enterobacteriaceae Aspectos atuais de colicinas de Enterobacteriaceae

    Directory of Open Access Journals (Sweden)

    Luciana Cursino

    2002-09-01

    Full Text Available The colicins are protein compounds produced by, and active against, Escherichia coli and others members of Enterobacteriaceae family. At least 34 different colicins have been described and found to share an interesting number of features. In the present review we focus on the major characteristics of colicins of gram-negative bacteria and explore their production and practical applications.The colicins are protein compounds produced by, and active against, Escherichia coli and others members of Enterobacteriaceae family. At least 34 different colicins have been described and found to share an interesting number of features. In the present review we focus on the major characteristics of colicins of gram-negative bacteria and explore their production and practical applications.As colicinas são compostos proteináceos produzidos por Escherichia coli e outros membros da família Enterobacteriaceae, sendo ativas, principalmente, contra bactérias mais relacionadas. São conhecidos pelo menos 34 tipos diferentes de colicinas, apresentando algumas delas características intrigantes. Nesta revisão são abordados os principais aspectos das colicinas das bactérias gram-negativas, explorando desde sua produção até ass suas aplicações práticas.

  14. Apendicite epiplóica: aspectos na ultra-sonografia e na tomografia computadorizada

    Directory of Open Access Journals (Sweden)

    Melo Alessandro Severo Alves de

    2002-01-01

    Full Text Available A apendicite epiplóica é uma condição inflamatória incomum, porém cada vez mais freqüentemente diagnosticada pelos métodos de imagem atuais (tomografia computadorizada e ultra-sonografia, os quais possibilitam a adoção de conduta terapêutica não-invasiva e eficiente. Os autores estudaram seis casos de apendicite epiplóica por meio de tomografia computadorizada, que mostraram lesões ovaladas de 1 a 2 cm de diâmetro, de localização paracólica, com atenuação de gordura e pequena lâmina hiperdensa periférica com gordura marginal peritoneal espessada. Dois desses pacientes foram submetidos a ultra-sonografia, que demonstrou formações expansivas hiperecóicas, de aspecto ovóide, não compressíveis, localizadas sob o sítio de maior sensibilidade do abdome.

  15. Heminegligencia visuo-espacial: aspectos clínicos, teóricos y tratamiento

    Directory of Open Access Journals (Sweden)

    Celeste Aparicio-López

    2014-06-01

    Full Text Available Objetivo: Realizar una revisión descriptiva sobre la heminegligencia visuo-espacial asociada a accidentes cerebro-vasculares. Se abordan los aspectos clínicos y teóricos más relevantes, así como las diferentes técnicas de intervención utilizadas actualmente. Desarrollo: La heminegligencia visuo-espacial es un déficit neuropsicológico multimodal asociado a lesiones cerebrales, principalmente de origen vascular. Su presencia implica una recuperación más lenta, mayor discapacidad y una respuesta precaria a la rehabilitación. Aunque la recuperación espontánea puede ocurrir en el transcurso de las primeras semanas o meses, el paso del tiempo no necesariamente implica una mejora de los síntomas. A día de hoy se han desarrollado múltiples estrategias de rehabilitación, pero son muy pocas las que demuestran efectos perdurables en el tiempo. Conclusiones: La adaptación de prismas es la técnica con la que se obtienen mejores resultados, aunque existen controversias respecto a sus beneficios a largo plazo. Las diferentes intervenciones que se describen en el artículo tienen un impacto transitorio y los resultados no acostumbran a traducirse en una mejora en las actividades de vida diaria. Las tendencias actuales apuestan por la aplicación combinada de diferentes técnicas.

  16. Aspectos celulares novedosos en los mecanismos de embriogénesis

    Directory of Open Access Journals (Sweden)

    Sara Elena Panizo Bruzón

    2014-08-01

    Full Text Available La decodificación del genoma humano inició una nueva era en la investigación científica, sobre todo en aquellos campos que involucran eventos celulares y, por consiguiente, a los mecanismos morfogenéticos básicos. Por su importancia, se realiza una revisión bibliográfica, con el objetivo de actualizar en aspectos relacionados con los fundamentos de los mecanismos morfogenéticos básicos. Para la revisión se emplearon los recursos disponibles en la red Infomed, se consultaron las bases de datos Medline y PubMed. En el estudio se indica que los mecanismos morfogenéticos son eventos celulares o fenómenos biológicos, cuya investigación actual intenta explicar, desde un nivel celular, subcelular o molecular, por qué se desencadenan las transformaciones expuestas por la embriología. Se describen los mecanismos morfogenéticos, teniendo en cuenta los últimos conocimientos generados al respecto, evidenciándose que cuando existen deficiencias en ellos, aparecen los defectos en el desarrollo. Se hace referencia a investigaciones que utilizan estos conocimientos a nivel celular, para comprender la génesis de enfermedades y desarrollar novedosos tratamientos

  17. Aspectos médicos del arte separatoria de Diego de Santiago

    Directory of Open Access Journals (Sweden)

    Teixidó Gómez, Francisco

    1999-06-01

    Full Text Available Diego de Santiago, an alchemist at «El Escorial», is a key figure to understand the late influence that Paracelsus had in Spain. This work shows how he differs from the medical authorities of his day and traditional medicine. On the other hand, Galenic medical thought and Paracelsus' chemical Medicine intermingle in the Extremenian scientific work.

    Diego de Santiago, destilador en el monasterio de El Escorial, es una figura fundamental para comprender la tardía influencia que el paracelsismo tuvo en España. El presente trabajo muestra, en muchos aspectos, su separación manifiesta de los saberes y actitudes de los profesionales de la salud y de la medicina tradicional. Por otro lado, en el pensamiento científico del extremeño se entremezclan, en otras ocasiones, el galenismo tradicional y la orientación química de la obra médica de Paracelso.

  18. Algunos aspectos histórico-sociales del aborto Some historical and social aspects of abortion

    Directory of Open Access Journals (Sweden)

    Digna Mayo Abad

    2002-08-01

    Full Text Available Se realizó una revisión de aspectos históricos y sociales de la práctica del aborto desde los inicios de la humanidad hasta las corrientes actuales en el mundo y la posición de nuestro país al respecto. Se enfatizó en la necesidad de un mayor uso de los métodos anticonceptivos disponibles a fin de disminuir la morbi-mortalidad por causa de la utilización del aborto como método de control de la natalidad.It was made a review of the historical and social aspects of the practice of abortion from the beginning of humanity to the current trends in the world, as well as of the position of our country on this regard. Emphasis was made on the need to use the available contraceptive methods so as to reduce the morbidity and mortality caused by the use of abortion as a birth control method

  19. Aspectos impositivos do comércio eletrônico

    Directory of Open Access Journals (Sweden)

    Carlos Araújo Leonetti

    2006-12-01

    Full Text Available Este artigo objetiva mostrar a situaçãoatual da tributação do assim chamado comércioeletrônico no Brasil, enfatizando alguns aspectos.Basicamente, o e-commerce pode ser, e é, aindaque com algumas dificuldades, no Brasil, por meiode dois impostos: o ICMS, estadual; e o ISS,municipal. A imposição de ambos apresenta, aindadificuldades, principalmente, por falta delegislação específica, em especial, no que tange àtributação da circulação, pela internet, doschamados bens intangíveis, com os softwares.This paper aims to show the presentsituation of the e-commerce taxation in Brazil,focusing on major aspects. In a few words, inBrazil e-commerce can be, an it is, imposed bytwo taxes: one state tax, the ICMS (a kind of VATtax, and one city tax, the ISS (a tax on servicesThe collection of both taxes on e-commercetransactions, mostly when involve intangiblegoods, as software, implies legal difficultiesbecause there are no specific regulations on thismatter, so far.

  20. Eikenella corrodens: Patogénesis y aspectos clínicos.

    Directory of Open Access Journals (Sweden)

    Rubén Darío Jaramillo

    2009-11-01

    Full Text Available El ambiente microbiológico oral es único y tiene una dinámica compleja. Se calcula que cerca de 500 especies de bacterias habitan la cavidad oral humana, y alrededor de 22 géneros son los predominantes. Las bacterias que se aíslan con más frecuencia de los sitios infectados de la cavidad oral, y que son también patógenos potenciales, forma un grupo pequeño de microorganismos gramnegativos, entre los que se incluyen los siguientes: Actinobacillus actinomycetemcomitans, Bacteroides forsythus, Campylobacter spp., Capnocytophoga spp., Eikenella corrodens, Fusobacterium nucleatum, Porphyromonas gingivalis, Prevotella intermedia y el grupo-Streptococcus milleri. E. corrodens se reconoce como un microbio patógeno oportunista en la cavidad oral; también, puede causar infecciones extra orales, como un agente infeccioso solo o en combinaciones con diversas bacterias. La presente revisión, con un énfasis en E. corrodens, mostrará varios aspectos de sus características microbiológicas y bioquímicas, también se sistematizan y discuten el conocimiento actual sobre los mecanismos de patogénesis, como los lipopolisacáridos, proteínas externas de membrana, complejo de adesina, pili y otros; infecciones oral y extra oral; factores predisponentes; endocarditis; osteomielitis, infecciones intra-abdominales; diagnóstico y agentes antimicrobianos.

  1. Eikenella corrodens: Patogénesis y aspectos clínicos

    Directory of Open Access Journals (Sweden)

    Rubén Darío Jaramillo

    2006-09-01

    Full Text Available El ambiente microbiológico oral es único y tiene una dinámica compleja. Se calcula que cerca de 500 especies de bacterias habitan la cavidad oral humana, y alrededor de 22 géneros son los predominantes. Las bacterias que se aíslan con más frecuencia de los sitios infectados de la cavidad oral, y que son también patógenos potenciales, forma un grupo pequeño de microorganismos gramnegativos, entre los que se incluyen los siguientes: Actinobacillus actinomycetemcomitans, Bacteroides forsythus, Campylobacter spp., Capnocytophoga spp., Eikenella corrodens, Fusobacterium nucleatum, Porphyromonas gingivalis, Prevotella intermedia y el grupo-Streptococcus milleri. E. corrodens se reconoce como un microbio patógeno oportunista en la cavidad oral; también, puede causar infecciones extra orales, como un agente infeccioso solo o en combinaciones con diversas bacterias. La presente revisión, con un énfasis en E. corrodens, mostrará varios aspectos de sus características microbiológicas y bioquímicas, también se sistematizan y discuten el conocimiento actual sobre los mecanismos de patogénesis, como los lipopolisacáridos, proteínas externas de membrana, complejo de adesina, pili y otros; infecciones oral y extra oral; factores predisponentes; endocarditis; osteomielitis, infecciones intra-abdominales; diagnóstico y agentes antimicrobianos.

  2. Considerations on scanography of orbital masses Aspecto escanográfico de algunas masas orbitarias

    Directory of Open Access Journals (Sweden)

    Guillermo Velásquez

    1990-01-01

    Full Text Available

    We report on our experience with 75 patients with orbital masses, studied with Computerized Tomography (CT, at the Ophtalmology and Radiology Services, Hospital Universitario San Vicente de Paúl, and University of Antioquia, School of Medicine, Medellín, Colombia. The most frequent lesions were: retinoblastoma, vascular lesions, infectious lesions, tumors of the lacrymal gland, mucocele, meningloma, melanoma, and metastatic masses. On the basis of our experience we highly recommend CT as the most valuable diagnostic procedure for the study of patients with proptosis and clinical signs of an orbital mass.

    En este artículo se presenta una casuística de 75 masas orbitarias estudiadas en el Hospital Universitario San Vicente de Paúl, de Medellín, mediante la Tomografía Axial Computada y se incluyen imágenes ilustrativas de ocho de ellas; las entidades más frecuentes fueron: retinoblastoma, lesiones vasculares, lesiones Infecciosas y neoplasias de la glándula lacrimal; se mencionan aspectos clínicos seleccionados y se discuten las ventajas de la tomografía para el estudio de este problema; finalmente, se consignan recomendaciones para el uso racional del procedimiento.

  3. La profesionalización del recurso humano policial. Aspectos curriculares que se deben contemplar

    Directory of Open Access Journals (Sweden)

    María Gabriela Arce Navarro

    2008-01-01

    Full Text Available Este artículo desarrolla una propuesta de organización curricular que garantice el alcance de los objetivos, metas y funciones encomendadas a la Escuela Nacional de Policía, entidad a la que le ha sido conferida la potestad para formar y capacitar a las personas encargadas de velar por la seguridad ciudadana de nuestro país. La propuesta considera elementos aún no establecidos por este centro educativo, aportando avances curriculares significativos para la futura implementación del currículo. Por otro lado, describe los componentes que caracterizan el actual currículo de la Escuela, develando aspectos relevantes sobre la formación y capacitación policial, así como la apertura de esta Institución a los enfoques por competencias laborales, campo en el que incursionó con la implementación del actual Curso Básico Policial por Competencias Laborales.

  4. Aspectos sanitarios en el asedio de Baler, Filipinas (1898-1899

    Directory of Open Access Journals (Sweden)

    J.A. Martín Ruiz

    2015-12-01

    Full Text Available Estudiamos la situación sanitaria durante el prolongado asedio de Baler con ocasión de la guerra de independencia de Filipinas y posterior intervención norteamericana (1898-1899, contemplando tanto los medios materiales y humanos de que disponían como las heridas y enfermedades a las que hubieron de hacer frente. No cabe duda que estas últimas se vieron favorecidas por las deficientes condiciones higiénicas de la iglesia en la que se refugiaron y, sobre todo, la mala alimentación que también examinamos dada su relación con estos aspectos médicos, de tal modo que, al igual que aconteció al resto del Ejército español que combatía en Filipinas o en Cuba, fueron las enfermedades las responsables de la mayor parte de los fallecimientos al causar más bajas que los propios sitiadores.

  5. Aspectos clínicos da etiologia da hipersensibilidade dentinária cervical

    Directory of Open Access Journals (Sweden)

    SOBRAL Maria Angela Pita

    1999-01-01

    Full Text Available Esta pesquisa visa o estudo dos aspectos clínicos da hipersensibilidade dentinária cervical (HSDC. Um total de 32 pacientes com sintomas de HSDC foram examinados para identificar sua etiologia, sendo avaliados clinicamente 97 dentes. Com base na anamnese e exames clínicos efetuados, classificamos as lesões de acordo com suas principais características em: abrasão, erosão ou abfração. Os seguintes fatores puderam ser associados ao desencadeamento da HSDC: melhor e constante higienização, tratamento periodontal, consumo de alimentos ácidos e trauma oclusal. Concluímos que as lesões pequenas e radiculares estão mais associadas à HSDC, sendo os pré-molares os dentes mais afetados. Alguns hábitos alimentares e de higienização, bem como situações oclusais não-harmônicas e o tratamento periodontal, foram os fatores que predispõem os elementos dentais à HSDC, e os pré-molares, neste estudo, os dentes mais acometidos por esses fatores. Concluímos que as lesões por abrasão foram aquelas que mais manifestaram HSDC.

  6. Aspectos energéticos da teoria cinética dos gases

    Directory of Open Access Journals (Sweden)

    Robert Saraiva Matos

    2014-12-01

    Full Text Available Normal 0 21 false false false PT-BR X-NONE X-NONE Neste artigo, discutem-se aspectos energéticos relacionados à Teoria Cinética dos Gases (TCG. Trata-se de um estudo de revisão bibliográfica. Os dados foram coletados através do levantamento das fontes, por meio de textos técnicos, publicações científicas e livros didáticos. Através da interpretação energética da TCG foi possível discutir a rota para o equilíbrio térmico, a transferência de partículas entre níveis de energia devido à variação na temperatura e também demonstrar a distribuição de Maxwell-Boltzmann-Gibbs. Além disso, notou-se que a visão energética das TCG fornece uma ponte entre colisões e transações financeiras. Conclui-se que a abordagem energética da TCG possui importância crucial para o entendimento dos fundamentos da Física Térmica, sobretudo no Ensino Médio, onde estes estudos possuem uma demanda significativa na disciplina de Física

  7. Aspectos Estructurales de Bosque de Cativo en la Región del Bajo Atrato, Colombia

    Directory of Open Access Journals (Sweden)

    Gonzalez P Humberto

    1991-09-01

    Full Text Available El planteamiento de sistemas de manejo de los bosques tropicales, requiere del conocimiento tanto de la estructura actual, como de la estimación racional de la respuesta probable del sistema a prácticas culturales que la modifiquen. En este trabajo se hace un análisis de algunos de los parámetros estructurales más relevantes de una asociación vegetal conocida en Colombia con el nombre de catival. Los aspectos que se analizan tienen que ver tanto con características estáticas como dinámicas de dos tipos de bosques sujetos a diferentes grados de inundación. Los resultados muestran que las agrupaciones presentan diferencias sustanciales tanto en términos de la estructura de diámetros y de la diversidad florística como en el grado de importancia y en el patrón de distribución espacial de la especie predominante (PrioriacopaiferaG. Además, las tasas de crecimiento difieren significativamente entre las dos comunidades siendo aproximadamente tre veces superior en el catival A2, que en el catival A1. El estudio además de proporcionar información que permite alimentar planteamientos para el manejo de los cativales, describe las aplicaciones de metodologías para su evaluación y análisis.

  8. Condições de trabalho de enfermeiras obstetras: aspectos de uma realidade

    Directory of Open Access Journals (Sweden)

    Isa Maria Nunes

    2002-12-01

    Full Text Available O objetivo deste trabalho foi descrever as condições de trabalho da enfermeira obstetra, suas especificidades, transformações e contradições. A amostra foi constituída de dez enfermeiras habilitadas e/ou especialistas em enfermagem obstétrica, atuantes em seis instituições públicas de Salvador sendo quatro maternidades e dois hospitais gerais. Foram utilizadas a entrevista e a observação participante, como técnicas de coleta de dados. Os resultados, sobre as condições de trabalho são apresentados através dos seguintes componentes: jornada de trabalho; remuneração; alimentação e repouso, recursos humanos; estrutura física equipamentos e mobiliário; materiais e outros aspectos. Constata-se a existência de muitas inadequações nas condições oferecidas para o trabalho da enfermeira obstetra relacionadas à prestação da assistência à mulher durante o parto. Foram encontrados ainda relatos acríticos em relação às condições existentes para o trabalho, expondo contradições inerentes ao trabalho em saúde entendido como prática social.

  9. Aspectos clínicos de la Blastomicosis sudamericana (Paracoccidioidomicosis en el Perú

    Directory of Open Access Journals (Sweden)

    Zuño Burstein Alva

    2002-01-01

    Full Text Available En esta revisión se presentan las características más notorias del cuadro clínico de la Blastomicosis Sudamericana en el Perú, tomando como fuente informativa nuestro trabajo del año 1971 (VII Congreso Ibero Latinoamericano de Dermatología, realizado en Caracas, Venezuela que presentó la mayor casuística publicada hasta la actualidad en nuestro medio totalizando 111 casos al recopilar la información de Pesce H., desde el año 1937 hasta 1965, con 71 casos, y la nuestra con 40 casos nuevos del Servicio Académico Asistencial de Dermatología de la Universidad Nacional Mayor de San Marcos en el Hospital Dos de Mayo de Lima, estudiados hasta el año 1971. Con esta casuística se analizan la distribución geográfica, edad, sexo, ocupación, evolución clínica, aspectos y formas clínicas de esta enfermedad.

  10. ASPECTOS DA PRÁTICA MUSICOTERAPÊUTICA: CONTEXTO SOCIAL E COMUNITÁRIO EM PERSPECTIVA

    Directory of Open Access Journals (Sweden)

    Andressa Dias Arndt

    2016-08-01

    Full Text Available Resumo Este artigo propõe uma discussão sobre os pressupostos que fundamentam a prática da Musicoterapia, especificamente quando esta se identifica como uma ação de base social e comunitária. A partir de uma localização histórica, desenvolvem-se reflexões críticas acerca dos principais conceitos que balizam a práxis musicoterapêutica em contexto social e comunitário. A discussão apresentou o termo musicoterapia social e comunitária como uma tentativa de abranger fundamentos da psicologia, sobretudo em uma vertente crítica e sócio-histórica, que abordam uma prática centrada nas relações humanas, na grupalidade e na ação democrática. Temas como lugar, espaço e ação musicoterapêutica foram discutidos. Concluiu-se que tal prática pretende a modificação da realidade social por meio do convívio mediado da criação de sonoridades, em um processo ativo fundamentado na cultura e em aspectos da vivência cotidiana.

  11. Aspectos estructurales del comercio fronterizo entre México y Estados Unidos

    Directory of Open Access Journals (Sweden)

    Bernardo González-Aréchiga

    1985-01-01

    Full Text Available El objetivo de esta presentación es discutir algunos aspectos estructurales de la frontera y someter a discusión la estrategia de investigación del Departamento de Estudios Económicos de CEFNOMEX. Aquí se explica cómo la frontera norte cuenta con una estructura comercial dual con patrones variables de consumo de servicios en Estados Unidos, tales como los educacionales, médicos, asistenciales, etc., que han afectado a la creación de una infraestructura local, y que la zona fronteriza del norte de México exhibe importantes distorsiones estructurales que deben estudiarse para entender sus funcionamiento económico. Es importante mejorar la base informativa con recolección directa. La investigación económica de la región requiere tanto del estudio de sus instituciones, como del monitoreo constante y cuidadoso de sus signos vitales. Una estrategia adecuada de investigación debe combinar ambos y aprovechar las complementariedades de los dos tipos de estudio.

  12. Aspectos Estruturais e Fitoquímicos de partes vegetativas de Costus spicatus (Jacq. Sw. (Costaceae

    Directory of Open Access Journals (Sweden)

    L.S. Paes

    2013-01-01

    Full Text Available As folhas de Costus spicatus são amplamente empregadas na medicina popular para o tratamento de várias doenças entre elas: malária, hepatite e doença do aparelho urinário. O objetivo deste trabalho foi identificar aspectos da anatomia dos órgãos vegetativos (folhas, caules, raízes e rizomas associados à triagem fitoquímica visando contribuir com informações relevantes para o desenvolvimento de estudos taxonômicos e farmacológicos. A análise anatômica por meio da microscopia óptica e de varredura evidenciou folha anfi-hipoestomática, com estômatos e tricomas tectores filamentosos simples. O mesofilo é constituído por parênquima clorofiliano, que se divide em duas regiões intercaladas por cordão de fibras e feixes vasculares. O caule é do tipo atactostélico como no rizoma. A raiz é poliarca. Os testes histoquímicos indicaram a presença de amido, proteínas estruturais, alcaloides, cristais de oxalato de cálcio. A prospecção química com extratos hidroalcoólico e aquoso constatou a presença de saponinas, taninos, alcaloides, compostos fenólicos e heterosídeos cianogênicos.

  13. Aspectos formales y visuales en los cuestionarios de salud y calidad de vida

    Directory of Open Access Journals (Sweden)

    Nereida Congost Maestre

    2012-06-01

    Full Text Available Una falta de atención en el formato de los cuestionarios de salud y calidad de vida ocasiona que muchas preguntas no se contesten porque no se pueden leer bien. Se hace aquí una reflexión sobre tales aspectos visuales, analizando siete de los cuestionarios genéricos en lengua inglesa más utilizados en el mundo y comparándolos, a su vez, con sus traducciones al español. Los resultados que se obtienen subrayan la idea de la importancia que tiene la presentación del cuestionario para conseguir la máxima información. ----------------------------------------------- Visual and formal aspects of questionnaires on health and quality of life. Lack of attention to the format of questionnaires on health and quality of life results in many questions going unanswered because they cannot be read easily. Here we reflect on these visual aspects by analyzing seven of the world's most-used generic English-language questionnaires and comparing them to their Spanish translations. The results of our work highlight the importance of presentation in obtaining the maximum amount of information from a questionnaire.

  14. O processo de internacionalização e os aspectos socioambientais: o caso Embraer

    Directory of Open Access Journals (Sweden)

    Isak Kruglianskas

    2008-04-01

    Full Text Available O objetivo deste trabalho é colaborar para que se compreenda se a capacidade de uma organização competir em um mercado internacional pode ser influenciada por questões relacionadas aos aspectos socioambientais que a envolvem, com base nos diferentes contextos em que esta passa a operar. O estudo, de caráter exploratório e descritivo, trata da análise do processo de internacionalização da Embraer, e pautou-se na estratégia de um estudo de caso único e, como meio de coleta de dados, foi escolhida a entrevista pessoal em profundidade, além de utilização de dados de fontes secundárias. O ponto de destaque como resultado é a necessidade da indústria de aviação se reestruturar sob um novo enfoque, que valorize as variáveis sociais e ambientais, sob pena de sua própria sobrevivência em longo prazo.

  15. ESTUDIO DE ASPECTOS RELEVANTES DE LOS HABITANTES DE CAZUCÁ (SECTOR 4

    Directory of Open Access Journals (Sweden)

    Gregorio Clavijo Parrado

    2007-01-01

    Full Text Available Esta investigación de tipo descriptivo tuvo como objetivo general el acercamiento a la realidad social, económi - ca y demográfica de un sector de la comunidad de Cazucá, en aspectos considerados relevantes, tales como: vivienda, educación, ocupación, ingresos, gastos, edad y otros. Aunque la observación de campo se realizó en el sector cuatro de Cazucá (Soacha/Cundinamarca, se podría considerar como una muestra representativa de lo que podría estar sucediendo con el total de la comunidad. Dadas las características socioeconómicas de las familias, como unidades de observación, los resultados de - tectaron su vulnerabilidad a través de dimensiones tangibles y no tangibles relacionadas con la pobreza que, posteriormente, podrían ser objeto de indagación más profunda. Los resultados se socializarán con la comunidad y con las entidades y organismos que en Cazucá están o estén adelantando programas culturales, educativos, microempresariales y otros.

  16. Aspectos celulares en el diagnóstico y tratamiento de los defectos faciales

    Directory of Open Access Journals (Sweden)

    Sara Elena Panizo Bruzón

    2014-11-01

    Full Text Available El manejo de los defectos congénitos refleja globalmente el estilo de vida y la cultura de los diferentes pueblos. Aunque los defectos faciales no constituyan peligro para la vida, existe el daño psicológico y estético para el niño y la angustia para la familia. Se realizó una revisión bibliográfica de los aspectos celulares novedosos, alternativas para el diagnóstico y tratamiento de los defectos congénitos faciales, empleando los recursos disponibles en la red infomed. Se reporta la fisura labio palatina, como uno de los defectos congénitos faciales más frecuentes; en su diagnóstico resulta de gran utilidad la ultrasonografía 3D y doppler color. Existen innovadoras alternativas de tratamiento: ortopedia tridimensional, distracción osteogénica alveolar, plasma rico en factores de crecimiento y coronas telescópicas

  17. Aspectos cognitivos e sociais das práticas científicas

    Directory of Open Access Journals (Sweden)

    Hugh Lacey

    2008-03-01

    Full Text Available Será um aspecto constitutivo dos juízos de aceitabilidade cognitiva de teorias o fato de serem feitos sob certas relações sociais que incorporam valores sociais específicos cultivados pelos pesquisadores (Helen Longino? Ou será que fazer juízos corretos desse tipo é apenas uma conseqüência de interações sociais que ocorrem sob essas relações (Philip Kitcher? Embora de maneira geral subscreva o segundo ponto de vista, faço uma distinção, ausente dos escritos de Longino e Kitcher, entre aceitação correta e endossamento (endorsement de uma teoria, e defendo a tese de que a concepção de Longino aplica- se ao endossamento.Is it constitutive of making judgments of the cognitive acceptability of theories that they are made under certain social relations that embody specific social values that have been cultivated among investigators (Helen Longino? Or is making sound judgments of this kind just a consequence of social interactions that occur under these relations (Philip Kitcher? While generally endorsing the latter view, I make a distinction, not made by the philosophers under discussion, between sound acceptance and endorsement of a theory, and argue that Longino's view applies to endorsement.

  18. Aspectos éticos da experimentação animal Aspectos éticos de la experimentación animal Ethics and animal experiments

    Directory of Open Access Journals (Sweden)

    Taylor Brandão Schnaider

    2003-04-01

    Full Text Available JUSTIFICATIVA E OBJETIVOS: O tema abordado é de suma importância, pois almeja-se que o ser humano atinja seu bem-estar físico, mental, social e espiritual, sem esquecer os sagrados direitos de todos os animais. A maioria dos códigos internacionais que tratam das normas de pesquisa na área da saúde cita que a pesquisa desenvolvida em seres humanos deve estar fundamentada na experimentação prévia realizada em animais, em laboratórios ou em outros fatos científicos. O presente artigo tem por objetivo explanar os aspectos éticos da experimentação animal. CONTEÚDO: Os autores revêem os conceitos de dissertação e tese, tese experimental, ensaio experimental ou experiência piloto e de biotério. A seguir fazem uma retrospectiva histórica acerca da primeira tentativa para se estabelecer normas em relação à pesquisa experimental, ocorrida em meados do século XIX em Londres. É ressaltado que alguns critérios definidos àquela época persistem até o presente. A primeira comissão de ética em pesquisa animal foi criada na Suécia em 1979, e a seguir nos EUA em 1984. No Brasil, os comitês de ética em pesquisa animal foram constituídos a partir da década de noventa. Desde maio de 1979 existe a Lei Federal 6638 que estabelece normas para a prática didático-científica da vivissecção de animais. Essa lei, entretanto, ainda aguarda regulamentação. Além dela, tramitam no Congresso Nacional alguns anteprojetos dispondo sobre o uso de animais para atividades de ensino e pesquisa. Finalmente, são apresentadas na íntegra as normas adotadas pelo Colégio Brasileiro de Experimentação Animal e a Declaração Universal dos Direitos dos Animais. CONCLUSÕES: Os docentes, pós-graduandos, residentes e graduandos de uma Faculdade de Medicina, envolvidos em pesquisas realizadas em animais, devem conhecer os princípios éticos que visam proteger os animais selecionados para a realização de um trabalho científico.JUSTIFICATIVA Y

  19. Punta Pitt, Galapagos Ba/Ca Data for 1963-1982

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — File contains Ba/Ca data (in mmol/mol) presented by Lea et al. (1989). Samples were measured at the Massachusetts Institute of Technology by D. Lea. Ba...

  20. Interaction in ternary HgBr2-BaBr2-CsBr system

    International Nuclear Information System (INIS)

    Series of polythermal sections in ternary HgBr2-BaBr2-CsBr system are investigated by the methods of physicochemical analysis. In double systems restricting ternary HgBr2-BaBr2-CsBr system formation of CsHg2Br5, CsHgBr3, Cs2HgBr4, CsBa2Br4 and CsBa2Br5 compounds is detected. Projection of liquidus surface of ternary HgBr2-BaBr2-CsBr system on triangle of compositions is plotted. This projection consists of eight fields of the primary crystallization of phases: HgBr2, BaBr2, CsBr, CsHgBr5, CsHgBr3, Cs2HgBr4, Cs2BaBr4 and CsBa2Br5. Coordinates of nonvariant points are determined

  1. Thermal conductivity of superconducting joint of Y-Ba-Cu-O bulk materials

    International Nuclear Information System (INIS)

    We have measured the thermal conductivity (κ) of bulk Y-Ba-Cu-O blocks welded with sintered Er-Ba-Cu-O and Y-Ba-Cu-O/Ag at temperatures between 5 and 300 K. For comparison, the thermal conductivity was also measured for melt-textured Y-Ba-Cu-O and Er-Ba-Cu-O. All the samples showed the enhancement of κ at around 50 K, which was commonly observed in high temperature superconductors. The maximum κ values were 90 mW/cm K for both welded Y-Ba-Cu-O and melt-textured Er-Ba-Cu-O and 150 mW/cm K for melt-textured Y-Ba-Cu-O. Such differences have originated from different microstructural features

  2. Growth and characterization of acentric BaHf(BO{sub 3}){sub 2} and BaZr(BO{sub 3}){sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Mączka, Mirosław, E-mail: m.maczka@int.pan.wroc.pl [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2 (Poland); Szymborska-Małek, Katarzyna; Gągor, Anna [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wrocław 2 (Poland); Majchrowski, Andrzej [Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Str., 00-908 Warszawa (Poland)

    2015-05-15

    Growth, single crystal X-ray diffraction, polarized Raman and infrared (IR) studies of BaHf(BO{sub 3}){sub 2} are presented. Raman and IR spectra of polycrystalline BaZr(BO{sub 3}){sub 2} are also reported to facilitate assignment of modes. BaHf(BO{sub 3}){sub 2} borate crystallizes in trigonal system, space group R3c, with lattice parameters: a=5.1540(4) Å, c=33.901(3) Å. It accommodates dolomite-like structure doubled in the c direction, which is built of alternating layers of HfO{sub 6} octahedra and BaO{sub 6} distorted trigonal prisms that are connected through borate groups. The obtained structural as well as spectroscopic data show that BaHf(BO{sub 3}){sub 2} is isostructural with BaZr(BO{sub 3}){sub 2} and the deviations from centrosymmetry is small. - Graphical abstract: Arrangement of BO{sub 3} groups in BaHf(BO{sub 3}){sub 2} along the c direction in one unit cell. Dark and light blue denote different borate groups. - Highlights: • BaHf(BO{sub 3}){sub 2} single crystals were grown. • X-ray diffraction showed that this borate crystallizes in the acentric R3c structure. • Raman and IR spectra were measured for BaHf(BO{sub 3}){sub 2} and BaZr(BO{sub 3}){sub 2}, respectively. • Assignment of modes is proposed.

  3. Synthesis of TlBaCaCuO superconductive films with Tl diffusion into BaCaCu precursors

    International Nuclear Information System (INIS)

    There exists several techniques to synthesize TlBaCaCuO from precursor films. Recently, a two zone furnace technique was developed by DeLuca. Based on the authors' experience on the two zone furnace technique, they systematically conducted a series of experiments in a tube furnace with a temperature gradient distribution. The BaCaCuO precursor films were fabricated by an ink method, and the Tl diffusion source was Tl2O3. Superconductive films were characterized by SQUID magnetization measurement, X-ray diffraction, SEM, and EDS. Experimental results will be summarized

  4. Cómo realizar una comunicación científica. Aspectos tipográficos (III

    Directory of Open Access Journals (Sweden)

    Gutierrez Couto, U

    2005-09-01

    Full Text Available Resumen: El objetivo de este artículo es revisar los principales aspectos tipográficos para facilitar la legibilidad y la facilidad de lectura en la Web de un texto científico escrito.Abstract: The aim of this paper is review main typographical aspects to improve the legibility and readability of a scientific writing in the Web.

  5. Los miedos en el niño: Aspectos teóricos y un estudio directo

    Directory of Open Access Journals (Sweden)

    María Teresa GONZÁLEZ MARTÍNEZ

    2009-12-01

    Full Text Available En general se admite, tanto por el científico que estudia el comportamiento humano como por el observador atento de la realidad, que los fenómenos afectivos y emocionales (entre los que se incluyen los miedos son uno de los aspectos más significativos de la experiencia humana, umversalmente presentes en todo individuo a lo largo de su vida.

  6. Aspectos pedagógicos en la formación del recurso de enfermería en colombia

    OpenAIRE

    Aponte Garzón Luz Helena

    2010-01-01

    Desde hace algunos años, las enfermeras han venido manifestando su interés por conocer la historia de la profesión, los factores que la han influenciado, sus condiciones de desarrollo y otros aspectos que nos lleven a tener un conocimiento más profundo de la práctica de enfermería.

  7. Hematoma intraparenquimatoso cerebral espontâneo: aspectos à tomografia computadorizada Spontaneous cerebral intraparenchymatous hematoma: computed tomography findings

    OpenAIRE

    Celso Monteiro Soares; Antonio Carlos Pires Carvalho

    2005-01-01

    OBJETIVO: Identificar os aspectos mais freqüentes do hematoma intraparenquimatoso cerebral espontâneo observados na tomografia computadorizada. MATERIAIS E MÉTODOS: Foram analisados, retrospectivamente, os exames de tomografia computadorizada de 250 pacientes com hematoma intraparenquimatoso cerebral espontâneo, provenientes de três diferentes hospitais da cidade do Rio de Janeiro. RESULTADOS: O hematoma intraparenquimatoso cerebral profundo foi o de maior incidência, equivalendo a 54,4% (136...

  8. Nonlinearity parameter B/A of biological tissue ultrasound imaging in echo mode

    Energy Technology Data Exchange (ETDEWEB)

    Toulemonde, M., E-mail: matthieu.toulemonde@creatis.univ-lyon1.fr; Varray, F.; Bernard, A.; Basset, O.; Cachard, C. [Université de Lyon, CREATIS, CNRS UMR 5220, INSERM U1044, INSA-Lyon, Université Claude Bernard Lyon 1 (France)

    2015-10-28

    The nonlinearity B/A parameter influences the distortion of ultrasound waves during their propagation in tissue. Normal and pathological media have different B/A values and this parameter may be used to characterize them. In this paper the multitaper coherent plane wave compounding (MCPWC) is combined with the extended comparative method (ECM) to estimate the B/A parameter in simulation and acquisition. Using plane wave transmission and orthogonal apodization during beam forming improves the B/A estimation and delineation.

  9. Nonlinearity parameter B/A of biological tissue ultrasound imaging in echo mode

    International Nuclear Information System (INIS)

    The nonlinearity B/A parameter influences the distortion of ultrasound waves during their propagation in tissue. Normal and pathological media have different B/A values and this parameter may be used to characterize them. In this paper the multitaper coherent plane wave compounding (MCPWC) is combined with the extended comparative method (ECM) to estimate the B/A parameter in simulation and acquisition. Using plane wave transmission and orthogonal apodization during beam forming improves the B/A estimation and delineation

  10. High-Temperature Superconductivity in Doped BaFe2As2

    International Nuclear Information System (INIS)

    This thesis provides a detailed look on the synthesis, structural features and physical properties of iron arsenides. Especially the properties of BaFe2As2 and the solid solutions (Ba1-xKx)Fe2As2, (Ba1-xSrx)Fe2As2 and BaFe2(As1-xPx)2 which were all synthesized by solid state reactions by heating mixtures of the elements, were intensively investigated.

  11. Aspectos imunoistoquímicos da hepatite infecciosa canina Immunohistochemical aspects of canine infectious hepatitis

    OpenAIRE

    Maria Andréia Inkelmann; Bruno Leite dos Anjos; Glaucia Denise Kommers; Rafael Almeida Fighera; Claudio Severo Lombardo de Barros

    2008-01-01

    Tecidos de 27 cães que morreram de hepatite infecciosa canina (HIC) foram avaliados por imunoistoquímica (IHQ) para detecção de antígeno de adenovírus canino tipo 1 (CAV-1), por meio de um anticorpo monoclonal. Os tecidos examinados incluíram fígado, rim, baço, linfonodos, tonsilas, pulmão, intestino delgado, encéfalo e medula óssea. Para cada órgão foram atribuídos graus crescentes (de leve a acentuada) de intensidade de imunomarcação. O antígeno de CAV-1 estava presente na maioria dos órgão...

  12. Aspectos psicossociais da homofobia intrafamiliar e saúde de jovens lésbicas e gays

    Directory of Open Access Journals (Sweden)

    Juliana Perucchi

    2014-03-01

    Full Text Available O número de pesquisas sobre diferentes aspectos da homofobia cresceu nos últimos dez anos. Entretanto, há uma carência de estudos que analisem os aspectos psicossociais que envolvem as experiências de jovens lésbicas e gays mediante situações de violência e os desdobramentos destas na sua saúde. O presente artigo busca relatar os resultados de uma pesquisa que objetivou analisar como se constituem as situações de homofobia no âmbito das relações familiares vividas por jovens lésbicas e gays, analisando os aspectos psicossociais dos processos de ruptura ou afastamento temporário ou permanente do vínculo familiar. A hipótese confirmada ao longo desses anos de pesquisa é de que o preconceito se articula no contexto familiar como dispositivo de legitimação da violência e, consequentemente, ocasiona a ruptura do vínculo, o afastamento temporário ou permanente entre jovens lésbicas e gays e seus familiares, levando, muitas vezes, à saída ou à expulsão da casa dos pais em circunstâncias complexas e, frequentemente, dolorosas.

  13. Radioluminescence spectra of PWO crystals (co)doped by Ba

    Czech Academy of Sciences Publication Activity Database

    Boháček, Pavel; Nikl, Martin; Solovieva, Natalia; Trunda, Bohumil

    2004-01-01

    Roč. 38, - (2004), s. 363-365. ISSN 1350-4487 R&D Projects: GA ČR GA202/01/0753; GA MŠk ME 519 Institutional research plan: CEZ:AV0Z1010914 Keywords : lead tungstate * Ba (co)doping -radioluminescence Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 0.664, year: 2004

  14. The Danish Microbiology Database (MiBa) 2010 to 2013

    DEFF Research Database (Denmark)

    Voldstedlund, M; Haarh, M; Mølbak, Kaare

    2014-01-01

    The Danish Microbiology Database (MiBa) is a national database that receives copies of reports from all Danish departments of clinical microbiology. The database was launched in order to provide healthcare personnel with nationwide access to microbiology reports and to enable real-time surveillance...

  15. AMiBA-array for microwave background anisotropy

    Science.gov (United States)

    Kesteven, M.

    2002-03-01

    AMiBA is a 90 GHz interferometric array of the ASIAA (Academia Sinica, Institue of Astronomy and Astrophysics). It will make a detailed study of the polarization of the CMB anisotropy; it will also undertake a survey of Sunyaev-Zel'dovich clusters. It is under construction at present, with an expected completion date of late 2003. .

  16. Studies of radiative penguin B decays at BaBar

    Indian Academy of Sciences (India)

    John M LoSecco; BaBar Collaboration

    2004-03-01

    We summarize results on a number of observations of penguin dominated radiative decays of the meson. Such decays are forbidden at tree level and proceed via electroweak loops. As such they may be sensitive to physics beyond the standard model. The observations have been made at the BaBar experiment at PEP-II, the asymmetric factory at SLAC.

  17. Four-quasiparticle magnetic dipole band in 128Ba

    International Nuclear Information System (INIS)

    The four-quasiparticle magnetic dipole band in 128Ba has been investigated using the multidetector GASP. For the first time in this mass region linking transitions to the known level structure have been observed. The data are interpreted using the tilted axis cranking model. (authors)

  18. Nonlinear magneto-optical effects in Ba vapor

    CERN Document Server

    Novikova, I; Sarkisyan, D; Welch, G R; Novikova, Irina; Khanbekyan, Alexander; Sarkisyan, David; Welch, George R.

    2004-01-01

    We report the first measurements of linear and nonlinear magneto-optical polarization rotation on an intercombination transition of Ba vapor (lambda= 791.1nm). We observe a maximum polarization rotation angle in Faraday configuration of 15mrad, accompanied by suppression of absorption. A theoretical treatment of the nonlinear Faraday effect in the limit of a strong interacting light field is developed.

  19. 40 CFR 721.10010 - Barium manganese oxide (BaMnO3).

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 30 2010-07-01 2010-07-01 false Barium manganese oxide (BaMnO3). 721... Substances § 721.10010 Barium manganese oxide (BaMnO3). (a) Chemical substance and significant new uses subject to reporting. (1) The chemical substance identified as barium manganese oxide (BaMnO3) (PMN...

  20. Crystallization of the HigBA2 toxin-antitoxin complex from Vibrio cholerae

    DEFF Research Database (Denmark)

    Hadǽi, San; Garcia-Pino, Abel; Martinez-Rodriguez, Sergio;

    2013-01-01

    The genome of Vibrio cholerae encodes two higBA toxin-antitoxin (TA) modules that are activated by amino-acid starvation. Here, the TA complex of the second module, higBA2, as well as the C-terminal domain of the corresponding HigA2 antitoxin, have been purified and crystallized. The HigBA2 complex...

  1. X-ray excited optical luminescence studies on the system Ba (, =F, Cl, Br, I)

    Indian Academy of Sciences (India)

    K Govinda Rajan; A Jestin Lenus

    2005-08-01

    The present paper reports the experimental observations on the x-ray excited optical luminescence (XEOL) along with the afterglow and colour center features found for the barium salts, represented by the formula, Ba, where and are the halides. The system thus consists of four dihalides (BaF2, . . . ,BaI2) and six mixed halides (BaFCl,. . . ,BaBrI). To start with, it was found that on two of the binary halides of barium, BaClI and BaBrI, no literature exists, and so these were prepared for the first time and their crystal structures were determined. An x-ray generator of 3-kW rating was next coupled to a spectrometer via a high throughput fiberoptic sensor for recording the luminescence spectra under x-irradiation. Also presented in this paper are the observations on the Ba compounds in which about 0.1 mole% of Eu2+ was doped, in order to study the efficiency between the prompt luminescence and the photostimulated luminescence in these compounds. The crystal structure varies from fluorite (BaF2), to matlockite (BaF) and finally to orthorhombic (BaCl2, . . .,BaBrI) for these compounds. Hence searching for systematics and empirical relations in the observed XEOL behaviour of these compounds is still a challenging problem.

  2. Low affinity block of native and cloned hyperpolarization-activated Ih channels by Ba2+ ions

    NARCIS (Netherlands)

    I. van Welie; W.J. Wadman; J.A. van Hooft

    2005-01-01

    Ba2+ is commonly used to discriminate two classes of ion currents. The classical inward-rectifying K+ current, I(Kir), is blocked by low millimolar concentrations of Ba2+, whereas the hyperpolarization-activated cation current, I(h), is assumed not to be sensitive to Ba2+. Here we investigated the e

  3. Consideraciones para analizar los aspectos temporales de la producción del habla

    Directory of Open Access Journals (Sweden)

    Mónica Tapia Ladino

    2000-09-01

    Full Text Available Se presenta una revisión de diferentes trabajos teóricos y prácticos sobre análisis de los aspectos temporales del habla. Los procedimientos más utilizados para realizar este tipo de trabajos incluyen la medición de fenómenos como el tiempo de locución, el tiempo y duración de las pausas, entre otros. Los resultados demuestran que es posible asociar el tiempo de duración de las pausas con tiempo dedicado al procesamiento cognitivo asociado con tareas de búsqueda de palabras y con planificación de unidades discursivas. Para efectos de este artículo, interesa comentar y discutir aspectos del procedimiento de análisis de la producción del habla como el tamaño de la muestra, el análisis instrumental y la determinación de los tipos de pausas. En la mayoría de los trabajos revisados se asume que las pausas se asocian a trabajo cognitivo. Sin embargo, es posible advertir que ellas también cumplen otras funciones, como la comunicativa. Cuando se analizan muestras de habla naturales es necesario diferenciar un tipo de pausa de otras para así discriminar entre aquellos procesos derivados de dificultades para planificar el discurso, de aquellos que se realizan con fines fáticos. Un análisis posterior de las estructuras lingüísticas que se preparan durante las pausas y que se llevan a cabo después de ellas podría revelar cómo funciona el lenguaje en la mente. (We present a revision of several theoretical and practical studies about the analysis of temporal features of speech. The most common methodology to analyze speech production include phenomena as the time, speech, time and length of pauses, among others. The results of these studies show that it is possible to associate the length of pauses with the time dedicated to cognitive processing associated with tasks of word searching and planning of discourse. In this article, we are interested in analyzing and discussing to comment on and discuss features of the analysis

  4. Lindembergue Cardoso: aspectos de uma obra plural Lindembergue Cardoso: aspects of a pluralistic musical work

    Directory of Open Access Journals (Sweden)

    Ilza Nogueira

    2012-06-01

    Full Text Available Escrito imediatamente após a catalogação da obra completa do compositor baiano Lindembergue Cardoso (1939-1989, este artigo objetiva divulgar a dimensão e a constituição do seu acervo de documentos musicais, assim como abordar alguns aspectos característicos de sua obra, sob os pontos de vista funcional, ideológico e estético. O acervo catalogado consta de 189 documentos completos, além de 43 iniciados e aparentemente abandonados ou incompletos (aqueles em que notamos a falta de página(s, sem apresentarem vestígios de não terem sido concluídos. Considerando que a carreira do compositor se desenvolveu em 25 anos (1965-1989, deve-se admitir que o volume do seu legado é expressivo. São 110 obras indexadas por número de opus e outras peças sem indexação, dentre as quais se encontram arranjos, música incidental, umas poucas transcrições e orquestrações. Quanto aos aspectos característicos da obra, são determinantes: intimidade com a música folclórica e popular brasileira; religiosidade; criatividade tímbrica; estética eclética, resultante da interação entre tradição e inovação; atitude heterodoxa no uso de sistemas musicais tradicionais; valorização da expressão cênica na concepção musical; abertura à interação criativa do(s intérprete(s; e direcionamento aos conjuntos de estudantes e amadores.In the present article, written just after completing Brazilian composer Lindembergue Cardoso's catalogue of musical works, the author intends to present the composer's archive of musical documents, as well as to discuss characteristic aspects of his musical work. The archive consists of 189 complete and 43 unfinished or incomplete documents. Considering that the composer's career developed over 25 years (1965-1989, we must admit that the volume of his legacy is expressive. There are 110 works with opus numbers and other pieces without opus number, among which we find arrangements, incidental music, a few

  5. Eletroconvulsoterapia na depressão maior: aspectos atuais Electroconvulsive therapy in major depression: current aspects

    Directory of Open Access Journals (Sweden)

    Paula Barros Antunes

    2009-05-01

    Full Text Available OBJETIVO: A eficácia da eletroconvulsoterapia em tratar sintomas depressivos está estabelecida por meio de inúmeros estudos desenvolvidos durante as últimas décadas. A eletroconvulsoterapia é o tratamento biológico mais efetivo para depressão atualmente disponível. O objetivo deste estudo foi demonstrar o papel da eletroconvulsoterapia no tratamento da depressão e destacar aspectos atuais relativos à sua prática. MÉTODO: Foram revisados na literatura estudos de eficácia, remissão de sintomas, fatores preditores de resposta, assim como aspectos atuais acerca da qualidade de vida, percepção dos pacientes, mecanismo de ação, técnica e prejuízo cognitivos. RESULTADOS: Os principais achados desta revisão foram: 1 a eletroconvulsoterapia é mais efetiva do que qualquer medicação antidepressiva; 2 a remissão da depressão com a eletroconvulsoterapia varia, em geral, de 50 a 80%; 3 Ainda é controverso o efeito da eletroconvulsoterapia nos níveis de fator neurotrófico derivado do cérebro (acho que aqui pode colocar entre parenteses o "BNDF"; 4 a eletroconvulsoterapia tem efeito positivo na melhora da qualidade de vida; 5 os pacientes submetidos à eletroconvulsoterapia, em geral, têm uma percepção positiva do tratamento. CONCLUSÃO: A eletroconvulsoterapia permanece sendo um tratamento altamente eficaz em pacientes com depressão resistente. Com o avanço da sua técnica, a eletroconvulsoterapia tornou-se um procedimento ainda mais seguro e útil tanto para a fase aguda, quanto para a prevenção de novos episódios depressivos.OBJECTIVE: The efficacy of electroconvulsive therapy in treating depressive symptoms has been established by means of innumerable studies developed along the last decades. Electroconvulsive therapy is the most effective biological treatment for depression currently available. The objective of this study was to demonstrate the role of electroconvulsive therapy in the treatment of depression and

  6. Síndrome do túnel do carpo: aspectos atuais Carpal tunnel syndrome: present approaches

    Directory of Open Access Journals (Sweden)

    JOÃO ARIS KOUYOUMDJIAN

    1999-06-01

    Full Text Available Baseado na experiência eletrofisiológica do autor em 668 pacientes e em dados de literatura, foi realizada revisão sobre síndrome do túnel do carpo (STC analisando aspectos clínico-epidemiológicos e de conducão nervosa. O nervo mediano sofre desmielinização nodal ou segmentar por compressão no túnel do carpo, 3-4 cm distal à prega do punho. O complexo sintomátíco inclui dormência e fomigamento noturno nas mãos, frequentemente bilateral e mais comum em mulheres na faixa etária de 40-60 anos. São descritos casos familiares em que a herança poderia determinar ligamento transverso do carpo mais espesso. Fatores antropomórficos podem também representar risco adicional porém com pouca significância estatística. Ressonância magnética pode ser útil em casos selecionados e atípicos. São discutidos aspectos do tratamento conservador e controvérsias do tratamento cirúrgico. Na condução nervosa clássica observa-se aumento de latência distal sensitiva (segmentar e motora do nervo mediano. Métodos adicionais de sensibilização incluem latência palma-punho do mediano (misto, diferença de latência palma-punho mediano/ulnar (misto, diferença de latência mediano/radial e mediano/ulnar (sensitivo, técnica da centimetragem punho-palma com registro no II/III dedos e diferença mediano/ulnar com registro lumbrical/interósseo (motor.A clinical, epidemiological and nerve conduction studies report on carpal tunnel syndrome was done after electrophysiological author's experience on 668 cases and literature review. The median nerve underwent focal (nodal or segmental demyelination after compression on carpal tunnel, 3-4 distal to wrist fold. The symptomatic complex includes nocturnal hands numbness and paraesthesia, mostly bilateral and between 40-60 years old. Familial cases are described and the gene could encode thick transverse carpal ligament. Anthropomorphic findings could also bring about an additional risk, but with low

  7. Praseodymium valency from crystal structure in Pr-Ba-Cu-O and (Y-Pr)-Ba-Cu-O single crystals

    Energy Technology Data Exchange (ETDEWEB)

    Collin, G.; Albouy, P.A.; Monod, P.; Ribault, M. (Paris-11 Univ., 91 - Orsay (FR). Lab. de Physique des Solides); Collin, G. (CEA Centre d' Etudes Nucleaires de Saclay, 91 - Gif-sur-Yvette (FR). Inst. de Recherche Fondamentale (IRF))

    1990-06-01

    The substitution of Pr to Y leads to materials with a general formula (Y{sub 1-v}Pr{sub v}) (Ba{sub 2-x}Pr{sub x}) (Cu{sub 3-y} vac{sub y}) O{sub 6+x/2-y+z} and with a structural transition around v + x' {approx} 0.5. For v + x < 0.5 the crystals are orthorhombic, Y-Ba-Cu-O type, but with a lowered distortion. For v > 0.5 the crystals are tetragonal, La{sub 1.5}Ba{sub 1.5}Cu{sub 3}O{sub 7{plus minus}z} type, with the characteristic tri-twinning of this phase. The Pr valency, in the range 3-3.2{sup +} depending on preparation conditions, is determined from interatomic distances. Orthorhombic crystals of Pr Ba Cu O prepared at high temperatures exhibit a high amount of defects, y {approx} 0.25 on the Cu(1) site and are semiconductors with a T{sup -1/4} activation law attributed to the praseodymium valence fluctuation.

  8. Four-quasiparticle magnetic dipole band in {sup 128}Ba; Bande dipolaire magnetique a 4-qp dans {sup 128}Ba

    Energy Technology Data Exchange (ETDEWEB)

    Vogel, O.; Dewald, A.; Brentano, P. von; Gableske, J.; Kruecken, R.; Nicolay, N.; Gelberg, A. [Institut fuer Kernphysik der Universitaet zu Koeln, Koeln (Germany); Petkov, P. [Institute for Nuclear Research and Nuclear Energy, Sofia (Bulgaria); Gizon, A.; Gizon, J. [Inst. des Sciences Nucleaires, Grenoble-1 Univ., 38 (France); Bazzacco, D.; Rossi Alvarez, C.; Pavan, P. [Dipartimento di Fisica and INFN, Sezione di Padova, Padova (Italy); Lunardi, S.; Napoli, D.R. [INFN, Laboratori Nazionali di Legnaro, Legnaro (Italy); Frauendorf, S.; Doenau, F. [Forschungszentrum Rossendorf, Dresden, (Germany)

    1997-12-31

    The four-quasiparticle magnetic dipole band in {sup 128}Ba has been investigated using the multidetector GASP. For the first time in this mass region linking transitions to the known level structure have been observed. The data are interpreted using the tilted axis cranking model. (authors) 4 refs.

  9. Stellar Laboratories: 3. New Ba 5, Ba 6, and Ba 7 Oscillator Strengths and the Barium Abundance in the Hot White Dwarfs G191-B2B and RE 0503-289

    Science.gov (United States)

    Rauch, T.; Werner, K.; Quinet, P.; Kruk, Jeffrey Walter

    2014-01-01

    Context. For the spectral analysis of high-resolution and high-signal-to-noise (S/N) spectra of hot stars, state-of-the-art non-local thermodynamic equilibrium (NLTE) model atmospheres are mandatory. These are strongly dependent on the reliability of the atomic data that is used for their calculation. Aims. Reliable Ba 5-7 oscillator strengths are used to identify Ba lines in the spectra of the DA-type white dwarf G191-B2B and the DO-type white dwarf RE 0503-289 and to determine their photospheric Ba abundances. Methods. We newly calculated Ba v-vii oscillator strengths to consider their radiative and collisional bound-bound transitions in detail in our NLTE stellar-atmosphere models for the analysis of Ba lines exhibited in high-resolution and high-S/N UV observations of G191-B2B and RE 0503-289. Results. For the first time, we identified highly ionized Ba in the spectra of hot white dwarfs. We detected Ba vi and Ba vii lines in the Far Ultraviolet Spectroscopic Explorer (FUSE) spectrum of RE 0503-289. The Ba vi/Ba vii ionization equilibrium is well reproduced with the previously determined effective temperature of 70 000 K and surface gravity of log g=7.5. The Ba abundance is 3.5 +/- 0.5 × 10(exp-4) (mass fraction, about 23 000 times the solar value). In the FUSE spectrum of G191-B2B, we identified the strongest Ba vii line (at 993.41 Å) only, and determined a Ba abundance of 4.0 +/- 0.5 × 10(exp-6) (about 265 times solar). Conclusions. Reliable measurements and calculations of atomic data are a pre-requisite for stellar-atmosphere modeling. Observed Ba vi-vii line profiles in two white dwarfs' (G191-B2B and RE 0503-289) far-ultraviolet spectra were well reproduced with our newly calculated oscillator strengths. This allowed to determine the photospheric Ba abundance of these two stars precisely.

  10. The effects of BaSO4 loading on OPC cementing system for encapsulation of BaSO4 scale from oil and gas industry

    International Nuclear Information System (INIS)

    Highlights: • Fine BaSO4 powder can promote the formation of CaCO3 in the wasteform. • w/c = 0.53 is better than w/s = 0.53 to maintain the low porosity and low carbonation. • Water has little impact on the formation of CaCO3 when coarse BaSO4 was introduced. • It is possible to load 60 wt% of BaSO4 with a sufficient integrity of wasteform. -- Abstract: The BaSO4 scales obtained from piping decontamination from oil and gas industries are most often classified as low level radioactive waste. These wastes could be immobilised by stable cement matrix to provide higher safety of handling, transportation, storage and disposal. However, the information available for the effects of the basic formulation such as waste loading on the fundamental properties is still limited. The present study investigated the effect of BaSO4 loading and water content on the properties of OPC–BaSO4 systems containing fine BaSO4 powder and coarse granules. The BaSO4 with different particle size had a marked effect on the compressive strength due to their different effects on hydration products formed. Introduction of fine BaSO4 powder resulted in an increased formation of CaCO3 in the system, which significantly contributed to the compressive strength of the products. Amount of water was important to control the CaCO3 formation, and water to cement ratio of 0.53 was found to be a good level to maintain a low porosity of the products both for fine BaSO4 powder and coarse BaSO4 granule. BaSO4 loading of up to 60 wt% has been achieved satisfying the minimum compressive strength of 5 MPa required for the radioactive wasteforms

  11. Aspectos moleculares da anemia falciforme Molecular aspects for sickle cell anemia

    Directory of Open Access Journals (Sweden)

    Gentil Claudino de Galiza Neto

    2003-01-01

    Full Text Available No presente artigo abordaram-se vários aspectos relacionados à natureza molecular da anemia falciforme, desordem hematológica de caráter hereditário que acomete expressivo número de indivíduos em várias regiões do mundo. As pesquisas realizadas em torno desta patologia da hemácia, ao longo de quase um século, a partir de 1910, cooperaram para a criação de um novo e importante segmento da ciência, denominado biologia molecular. A descoberta dos polimorfismos da mutação (GAT->GTG no gene que codifica a cadeia beta da hemoglobina, originando diferentes haplótipos da doença, permitiu um melhor e mais amplo conhecimento em torno da heterogeneidade clínica nos pacientes falcêmicos. Analisando a hemoglobina na sua estrutura normal e mutante, sua produção e evolução, pode-se ter um entendimento mais completo da fisiopatologia desta doença e da sua complexidade clínica.The present article dealt with various aspects related to molecular nature of sickle cell disease (SCD, a heritable hematology disorder that attacks a great number of people in different regions of the world. Researches done on red cell patology, in approximately half a century, starting since 1910, cooperated to gave origin a new branch of science called molecular biology. The discovery of mutation polymorphism (GAT -> GTC in the gene that codifies beta globin chain, give origin to different illness haplotypes, permitted a better and great knowledge about the clinic heterogeneity of the patients. Analysing hemoglobin in its normal and mutation structure as well as in its productions and evolution, one can have a complete understanding of the illness phisiopathology and its clinical complexity.

  12. Aspectos gerais das septicemias e bacteriemias estafilocócicas no adulto

    Directory of Open Access Journals (Sweden)

    Adrelirio J. R. Gonçalves

    1969-06-01

    Full Text Available São apresentados 25 casos de infecções sistêmicas por estafilococos por pacientes adultos. Foram incluídos somente os casos em que houve concordância entre os achados bacteriológicos e clínicos. O Staphylccoceus aureus foi o mais encontrado em hemoculturas (17 casos. Dezoito casos comportaram-se verdadeiramente como septicemias caracterizadas por lesões metastáticas principalmente pulmonares, configurando os quadros clássicos de infartos pulmonares sépticos múltiplos. As principais complicações cardiovasculares foram a miocardite, endocardite, choque e o cor pulmonale agudo. As complicações neurológicas mais freqüentes foram meningite, coma e convulsões, tôdas seguidas de óbito. A porta de entrada mais freqüente foi através de infecção cutânea presente em 48% dos casos, seguida do aparelho genital feminino em conseqüência do abôrto provocado (20%. É apresentado estudo anátomo-patológico de 4 casos. Na discussão são apresentadas características biológicas do germe no sentido de facilitar o entendimento da fisiopatologia destas infecções sistêmicas assim como de esclarecer o quadro clínico exibido pelos pacientes. Breves considerações são realizadas no que concerne a patogenia e o quadro clínico nestas infecções e aspectos gerais de conduta terapêutica são assinalados.

  13. EL ASPECTO LÚDICO DEL E-LEARNING: EL JUEGO EN ENTORNOS VIRTUALES DE APRENDIZAJE

    Directory of Open Access Journals (Sweden)

    Lucio Margulis

    2007-06-01

    Full Text Available RESUMEN: El uso de las tecnologías de la información y la comunicación (TICs está revolucionando la forma de aprender, enseñar y jugar de las nuevas generaciones y las organizaciones modernas. Incluso, podemos apreciar cómo -en muchos casos- las personas aprenden más gracias al entorno (compañeros, situación de aprendizaje, elementos e institución con la que interactúan, que por los contenidos específicos o el docente del curso. En este artículo propongo compartir una mirada particular sobre el aspecto lúdico de la producción de contenidos multimediales para proyectos de educación basados en modalidades de “e-Learning” (aprendizaje electrónico y “Blended Learning” (formato mixto que combina lo mejor del mundo real y del virtual. ABSTRACT: The use of 'Information and Communication Technologies' (ICT's is revolutionizing the way of learning, teaching and playing of new generations and modern organizations.We can appreciate how in many cases people learn more due to their surroundings (classmates, learning situations, elements and institutions with which they interact, than because of the specific course teacher. In this article I propose we share a particular perspective concerning the playful aspect of the multimedia contents for education projects based on 'e-learning' (electronic learning and 'Blended Learning' (mixed format that combines the best of the real and virtual world.

  14. Aspectos do mito em "Invenção de Orfeu"

    Directory of Open Access Journals (Sweden)

    Oscar Lermenn

    1979-11-01

    Full Text Available This article completes the series published by Semina under the title: Orfeu of Jorge de Lima. Since the publications under this title constitute part of a thesis, the present article, the last in the series, presents the final parts and the conclusion In this part we stress the dynamic characteristic of the structural elements previously defined as: motility or "motion". This characteristic enlarges the imagery, on the ontological level, through association by similarity, as for instance: bird-fish-ship. We also point out to the more recurrent myths in the epopee and conclude stablishing an analogy of the semantic level, in the structural generation through expansion and articulation of the metaphorical universe, with the ontogeny on the biological level.Finaliza-se, no presente artigo, a série publicada pela revista SEMINA sob o título: Aspectos do mito em Invenção de Orfeu, de Jorge de Lima. Como as publicações sob este título constituem partes de uma tese, no presente artigo, o último da série, apresentam-se as partes finais e a conclusão. Salienta-se a característica dinâmica dos elementos estruturais definidos como tais: motilidade ou "movência". Esta amplia a imagística, a nível ontológico, pela associação por semelhança como: ave-peixe-nave. Destacam-se os mitos mais recorrentes na epopéia e conclui-se estabelecendo uma analogia do nível semântico na geração estrutural por expansão e articulação do universo metafórico com a ontogenia a nível biológico.

  15. ASPECTOS CONSTITUCIONAIS DA COSIP - UMA ANÁLISE À LUZ DO STF

    Directory of Open Access Journals (Sweden)

    Giovanna Paola Batista de Britto Lyra Moura

    2011-12-01

    Full Text Available RESUMO Muito embora esteja consolidado o entendimento acerca da natureza tributária da COSIP, a discricionariedade de estabelecer os aspectos quantitativos dessa exação ofertada, pela Constituição Federal de 1988, aos entes tributantes competentes para sua instituição possibilitou novas discussões acerca de sua constitucionalidade. Através da análise minuciosa de um julgado do STF (RE 573675/SC, o presente trabalho objetiva esclarecer alguns pontos controversos acerca da Contribuição de Iluminação Pública, sua natureza jurídica, base de cálculo e alíquota, pontos estes discutidos em plenário do Pretório Excelso por ocasião do julgamento do referido recurso. Palavras- chave: Cosip, natureza jurídica, discussões, constitucionalidade. CONSTITUTIONAL ASPECTS OF COSIP - AN ANALYSIS BASED ON STF'S POSITION ABSTRACT Even though the position of COSIP’s tax nature is already consolidated, the possibility given to the different public states to estabilish its multiple aspects led to new discussion over its constitutionality. Through the minucious analysis of a Federal Supreme Court’s (STF decision, the present work aims to clarify certain controversial points of the contribution over public illumination services (COSIP, such as its juridical nature, tax base and percentage, which were already discussed at that Supreme Court when the appeal was judged. Key-words: Contribution over public illumination services, juridical nature, discussion, constitutionality.

  16. Drogas, violência e aspectos emocionais em apenados Drugs, violence and emotional aspects in prisoners

    Directory of Open Access Journals (Sweden)

    Gislaine Pereira Tavares

    2012-01-01

    Full Text Available Objetivo deste trabalho foi avaliar: o abuso/dependência de drogas; os aspectos emocionais de carcerários e relacionar o uso de drogas com a conduta agressiva; sintomas depressivos e ansiosos; tipo de crime e reincidência. Os instrumentos utilizados foram: BDI, BAI, STAXI e MINI Plus. Os participantes (N=60 tinham média de idade de 27,88 (±4,53 anos com período mínimo de quatro meses de prisão. Constatou-se um nível de agressividade baixo, de sintomas depressivos e ansiosos mínimos, elevado índice de uso abusivo de álcool e outras drogas e associação entre uso de drogas, sintomas depressivos e agressividade. Concluiu-se que na amostra estudada houve alta frequência de uso de álcool e crime por roubo e que o uso de drogas tem um papel importante na agressividade e nos sintomas depressivos.The objectives of the present work were to evaluate the severity of drug abuse and drug dependence among prisoners as well as their emotional aspects, and to relate drug use with violent behavior, symptoms of depression and anxiety, type of crime and relapse. The instruments used were: BDI, BAI, STAXI and MINI Plus. The participants (N=60 were on average 27.88 years old (SD=4.53 and the minimum period of imprisonment was four months. The results showed that aggressiveness levels were low, and depression and anxiety levels were minimal in prisoners. However, a long history of alcohol consumption and other drugs abuse were observed among them as well as traits of depressive symptoms and aggressiveness. In conclusion, a large number of prisoners were alcohol addicted and their main kind of crime was robbery. They also showed emotional disorders related to aggressiveness and depression.

  17. Toxicologia do tolueno: aspectos relacionados ao abuso Toluene toxicology: abuse aspects

    Directory of Open Access Journals (Sweden)

    Letícia M.K. Forster

    1994-04-01

    Full Text Available O tolueno está presente em muitos produtos de uso doméstico e industrial e é o principal solvente envolvido no abuso de substâncias e na exposição ocupacional. O problema mais grave no estudo de patologias relacionadas ao tolueno é que este está geralmente associado, em suas preparações comerciais, a outras substâncias. O potencial tóxico do tolueno foi abordado nos seguintes aspectos: parâmetros farmacológicos; características físico-químicas; exposição; estudos clínicos; diagnóstico; pesquisa experimental; tolerância e dependência; efeitos agudos e crônicos; neurotoxicidade; teratogenicidade; doenças psiquiátricas; carcinogenicidade e tratamento. Conclui-se ser de grande importância e urgência que se realizem estudos clínicos com amostras maiores para definição mais precisa das conseqüências do uso crônicoToluene, present in many industrial and domestic products, is the main solvent involved in solvent abuse and occupational exposure. The main problem in studying toluene-related pathologies is the fact that it is frequently combined with other substances. This review focuses on its potential toxicity. The following subjects are discussed: pharmacologic parameters; physico-chemical features; exposure; clinical trials; experimental research; diagnosis; tolerance and dependence; acute and chronic effects; neurotoxicity; teratogenicity; psychiatric disorders; carcinogenicity; and treatment. It is concluded that is important more research on larger population samples with a view to better definition of the consequences.of chronic use should be undertaken.

  18. Primer Certamen Frenopático Español (1883: estructura asistencial y aspectos administrativos

    Directory of Open Access Journals (Sweden)

    Villasante Armas, Olga

    1997-06-01

    Full Text Available In the latter part of the XIX century, an important group of physicians worked in Nueva Belén, a Mental Hospital located near Barcelona. Juan Giné y Partagás, the Director of Nueva Belén and his colleagues undertook investigation, clinical and academic work. This group organized the most important scientific meeting on Psychiatry in the last century in Spain, although Psychiatry had not yet been recognized as an independent science. The present article describes the organization and contents of the "Primer Certamen Frenopático Español" using the original records. It is mainly focused on the Congress communications which deal with administrative and asistencial aspects of that time.

    En el último tercio del siglo XIX un grupo de profesionales de la Medicina trabajaba en Nueva-Belén, hospital psiquiátrico localizado en las proximidades de Barcelona. Juan Giné y Partagás, director de este manicomio, y sus colaboradores, realizaban una labor clínica, académica y de investigación. Fue este grupo el que organizó la reunión más importante sobre Psiquiatría que tuvo lugar en el pasado siglo en España, en un momento en el que la especialidad no era, aún, reconocida como una disciplina científica independiente del resto de la Medicina. El presente artículo describe la organización y contenidos del "Primer Certamen Frenopático Español" utilizando como material las actas originales del Congreso. Se centra en el análisis de las comunicaciones presentadas, cuyos contenidos temáticos son los aspectos administrativos y asistenciales de la frenopatología de la época.

  19. Aspecto léxico, sentido y colocaciones: los nombres de sentimiento

    Directory of Open Access Journals (Sweden)

    Begoña Sanromán

    2012-08-01

    Full Text Available El objetivo de este estudio es mostrar que la distinción aspectual entre predicados estativos individuales y episódicos puede aplicarse a los nombres que expresan sentimiento en español. Partimos de dos premisas: 1 los nombres de sentimiento son predicados estativos y 2 existen dos clases de nombres de sentimiento: por una parte, los nombres de causa interna (NCI, por ejemplo, respeto o envidia, denotan sentimientos que se originan en el experimentador como resultado de un pensamiento a través del cual se evalúa un objeto del mundo; por otra, los nombres de causa externa (NCE como asombro o desesperación representan sentimientos que surgen en el experimentador como reacción a un hecho externo. Como hipótesis de trabajo defendemos la existencia de correlaciones entre las dos clases de nombres de sentimiento, NCI y NCE, de un lado, y las dos clases de predicados estativos, individuales y episódicos, de otro, de tal modo que los NCI se comportan como predicados individuales y los NCE, como predicados episódicos. Dado que la diferencia fundamental entre los predicados individuales y los episódicos viene determinada por su capacidad o incapacidad para expresar los límites espaciales y/o temporales de la situación por ellos aludida, mostraremos que solo los NCE coocurren con expresiones delimitadoras de tiempo y/o espacio. Como pruebas para diagnosticar el comportamiento aspectual de los nombres de sentimiento, utilizamos las colocaciones, codificadas por medio del aparato formal de las funciones léxicas (FFLL de Mel’čuk (1996 y recogidas, en su mayor parte, en el Diccionario de colocaciones del español (DiCE.   Palabras clave. Predicados individuales y predicados episódicos; nombres de sentimiento; colocaciones; funciones léxicas; aspecto léxico.

  20. ASPECTOS RELACIONADOS CON LAS BASES BIOQUÍMICAS DE LA SIMBIOSIS MICORRÍZICA ARBUSCULAR

    Directory of Open Access Journals (Sweden)

    Yakelin Rodríguez

    2005-01-01

    Full Text Available Las investigaciones en el contexto agrícola, en los últimos años, se han dirigido a buscar soluciones donde los microorganismos del suelo juegan un papel protagónico, pues contribuyen a la recuperación de los agroecosistemas, permiten la sustitución parcial o total de los agentes químicos, además de su bajo costo de producción y la posibilidad de fabricarse a partir de recursos locales renovables. En Cuba y otros países, se han dado pasos acelerados para poner en práctica el uso de los biofertilizantes, entre los que se encuentran los hongos micorrízicos arbusculares (HMA, resultando numerosos los beneficios que le reportan estos hongos a las plantas que colonizan, dentro de los cuales se destacan el incremento de los rendimientos, las mejoras nutricionales, protección contra patógenos de la raíz y disminución de daños causados por factores medioambientales. Lo expuesto evidencia la importancia económica y ecológica de dichos hongos, de ahí que en los últimos años se le ha prestado especial atención a los estudios básicos concernientes a esta interacción simbiótica, donde los aspectos bioquímico-moleculares son claves en la comprensión del diálogo estrecho y coordinado que se establece entre ambos simbiontes, cuyo intercambio define la compatibilidad funcional y eficacia de la simbiosis como tal.

  1. O exercício físico e os aspectos psicobiológicos El ejercicio físico y los aspectos psicobiológicos Physical exercise and the psychobiological aspects

    Directory of Open Access Journals (Sweden)

    Marco Túlio de Mello

    2005-06-01

    Full Text Available O objetivo desta revisão é trazer parte dos estudos sobre um assunto pouco explorado: a relação entre o exercício físico e os aspectos psicobiológicos. A importância da compreensão desses aspectos e como eles afetam a qualidade de vida do ser humano é o que estimula as pesquisas sobre esse assunto. A literatura destaca que a prática regular de exercício físico traz resultados positivos não somente ao sono e aos seus possíveis distúrbios, mas também aos aspectos psicológicos e aos transtornos de humor, como a ansiedade e a depressão, e aos aspectos cognitivos, como a memória e a aprendizagem. Contudo, há indivíduos que se envolvem na prática de exercícios físicos com tal intensidade e/ou freqüência ou, ainda, fazem uso de drogas ilícitas que podem trazer prejuízos à saúde, como, por exemplo, o dependente de exercício físico e o usuário de esteróides anabolizantes. O exercício físico provoca alterações fisiológicas, bioquímicas e psicológicas, portanto, pode ser considerado uma intervenção não-medicamentosa para o tratamento de distúrbios relacionados aos aspectos psicobiológicos.El objetivo de esta revisión es trazer parte de los estudios sobre un asunto poco explorado: la relación ejercicio físico y los aspectos psicobiológicos. La importancia de la comprensión de estos aspectos y como ellos afectan la calidad de vida del ser humano és lo que estimula las pesquisas sobre este asunto. La literatura destaca que la práctica regular del ejercicio físico trae resultados positivos no solamente al sueño y a los posibles distúrbios, más también a los aspectos psicológicos y los trastornos del humor, como la ansiedad y la depresión, y los aspectos cognitivos, como la memoria y el aprendizaje. Con todo hay individuos que se envuelven en la práctica de ejercícios físicos con tal intensidad y / o frecuencia o, donde, hacen usos de drogas ilícitas que pueden traer perjuicios a la salud, como

  2. Direct NO decomposition over La{sub 2-x}Ba{sub x}NiO{sub 4} catalysts containing BaCO{sub 3} phase

    Energy Technology Data Exchange (ETDEWEB)

    Zhu, Yujun; Zhang, Guo [Heilongjiang Province Key Laboratory of Photoelectric, Energy and Environmental Materials, School of Chemistry and Materials, Heilongjiang University, 150080 Harbin (China); State Key Laboratory of Theoretical and Computational Chemistry, Jilin University, 130021 Changchun (China); Wang, Dong; Yuan, Fulong; Fu, Honggang [Heilongjiang Province Key Laboratory of Photoelectric, Energy and Environmental Materials, School of Chemistry and Materials, Heilongjiang University, 150080 Harbin (China)

    2008-08-08

    La{sub 2-x}Ba{sub x}NiO{sub 4} (x {<=} 1.2) catalysts have been prepared by citrate method. XRD patterns and IR spectra indicate that with the doping of Ba, more BaCO{sub 3} appears and perovskite-like structure is seriously distorted. In directly decomposing 4% NO, the highest N{sub 2} yield is achieved with La{sub 1.2}Ba{sub 0.8}NiO{sub 4} composed of perovskite-like structure phase and BaCO{sub 3} in the absence/presence of oxygen. The results of iodometry and H{sub 2}-TPR reveal that the increase in Ba causes the increase in Ni{sup 3+} content. O{sub 2}-TPD and NO adsorption tests confirm that Ba doping resulted in the increase in oxygen vacancy (Vo). Thus, the redox capability and the amount of Vo are enhanced. It is suggested that the BaCO{sub 3} phase, NO{sub x} storage component, contributes to the increase in activity by NO-TPD, NO{sub 2}-TPD and in situ DRIFT. Thus, BaCO{sub 3} plays an important role in quickening up the run of catalytic NO decomposition recycle. (author)

  3. Synthesis of BaTiO3 nanoparticles from TiO2-coated BaCO3 particles derived using a wet-chemical method

    OpenAIRE

    Yuuki Mochizuki; Naoto Tsubouchi; Katsuyasu Sugawara

    2014-01-01

    BaCO3 particles coated with amorphous TiO2 precursor are prepared by a wet chemical method to produce BaTiO3 nanoparticles at low temperatures. Subsequently, we investigate the formation behavior of BaTiO3 particles and the particle growth behavior when the precursor is subjected to heat treatment. The state of the amorphous TiO2 coating on the surface of BaCO3 particles depends on the concentration of NH4HCO3, and the optimum concentration is found to be in the range 0.5–1.0 M. Thermogravime...

  4. Improvement of electron mobility in La:BaSnO3 thin films by insertion of an atomically flat insulating (Sr,Ba)SnO3 buffer layer

    Science.gov (United States)

    Shiogai, Junichi; Nishihara, Kazuki; Sato, Kazuhisa; Tsukazaki, Atsushi

    2016-06-01

    One perovskite oxide, ASnO3 (A = Sr, Ba), is a candidate for use as a transparent conductive oxide with high electron mobility in single crystalline form. However, the electron mobility of films grown on SrTiO3 substrates does not reach the bulk value, probably because of dislocation scattering that originates from the large lattice mismatch. This study investigates the effect of insertion of bilayer BaSnO3 / (Sr,Ba)SnO3 for buffering this large lattice mismatch between La:BaSnO3 and SrTiO3 substrate. The insertion of 200-nm-thick BaSnO3 on (Sr,Ba)SnO3 bilayer buffer structures reduces the number of dislocations and improves surface smoothness of the films after annealing as proved respectively by scanning transmission electron microscopy and atomic force microscopy. A systematic investigation of BaSnO3 buffer layer thickness dependence on Hall mobility of the electron transport in La:BaSnO3 shows that the highest obtained value of mobility is 78 cm2V-1s-1 because of its fewer dislocations. High electron mobility films based on perovskite BaSnO3 can provide a good platform for transparent-conducting-oxide electronic devices and for creation of fascinating perovskite heterostructures.

  5. Experimental investigation of decay properties of neutron deficient $^{116-118}$Ba isotopes and test of $^{112-115}$Ba beam counts

    CERN Multimedia

    We propose to study decay of neutron deficient isotopes $^{116-118}$Ba using Double Sided Silicon Strip Detector (DSSSD). To study delayed-proton and $\\alpha$-decay branching ratios of $^{116-118}$Ba are of special interest because of their vicinity to the proton drip line. The nuclear life-times and properties of the proton unstable states of Cs isotopes, populated through decay of $^{116-118}$Ba isotopes will be measured. In addition to that we propose beam development of $^{112-115}$Ba to study exotic decay properties of these neutron deficient nuclei and to search for super-allowed $\\alpha$-decay in future.

  6. Phosphorylation of bamboo mosaic virus satellite RNA (satBaMV)-encoded protein P20 downregulates the formation of satBaMV-P20 ribonucleoprotein complex.

    Science.gov (United States)

    Vijayapalani, Paramasivan; Chen, Jeff Chien-Fu; Liou, Ming-Ru; Chen, Hsin-Chuan; Hsu, Yau-Heiu; Lin, Na-Sheng

    2012-01-01

    Bamboo mosaic virus (BaMV) satellite RNA (satBaMV) depends on BaMV for its replication and encapsidation. SatBaMV-encoded P20 protein is an RNA-binding protein that facilitates satBaMV systemic movement in co-infected plants. Here, we examined phosphorylation of P20 and its regulatory functions. Recombinant P20 (rP20) was phosphorylated by host cellular kinase(s) in vitro, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry and mutational analyses revealed Ser-11 as the phosphorylation site. The phosphor-mimic rP20 protein interactions with satBaMV-translated mutant P20 were affected. In overlay assay, the Asp mutation at S11 (S11D) completely abolished the self-interaction of rP20 and significantly inhibited the interaction with both the WT and S11A rP20. In chemical cross-linking assays, S11D failed to oligomerize. Electrophoretic mobility shift assay and subsequent Hill transformation analysis revealed a low affinity of the phospho-mimicking rP20 for satBaMV RNA. Substantial modulation of satBaMV RNA conformation upon interaction with nonphospho-mimic rP20 in circular dichroism analysis indicated formation of stable satBaMV ribonucleoprotein complexes. The dissimilar satBaMV translation regulation of the nonphospho- and phospho-mimic rP20 suggests that phosphorylation of P20 in the ribonucleoprotein complex converts the translation-incompetent satBaMV RNA to messenger RNA. The phospho-deficient or phospho-mimicking P20 mutant of satBaMV delayed the systemic spread of satBaMV in co-infected Nicotiana benthamiana with BaMV. Thus, satBaMV likely regulates the formation of satBaMV RNP complex during co-infection in planta. PMID:21965537

  7. Influence of Impurities on the Luminescence of Er3+ Doped BaTiO3 Nanophosphors

    Directory of Open Access Journals (Sweden)

    G. D. Webler

    2014-01-01

    Full Text Available The influence of the presence of barium carbonate (BaCO3 phase on the luminescence properties of barium titanate nanocrystals (BaTiO3 powders was investigated. Structural and optical characterizations of erbium (Er3+ doped BaTiO3 synthesized by the sol-emulsion-gel were performed. Using Fourier transform infrared spectroscopy and X-ray powder diffraction, we identified the presence of impurities related to BaCO3 and quantified its fraction. It was observed that the presence of BaCO3 phase, even at low levels, depletes significantly the infrared-to-visible upconverted luminescence efficiency of the produced nanopowders.

  8. Growth process of Ba-poor YBCO film fabricated by TFA-MOD process

    International Nuclear Information System (INIS)

    Metal organic deposition process using trifluoroacetates (TFA-MOD) is one of the most promising processes to fabricate YBCO film. It has been reported that YBCO films grown by the starting solution with Ba-poor (cation ratio as Y:Ba:Cu = 1:1.5:3) have higher JC value and has smaller and less pores than those of the YBCO film with stoichiometric composition. It is important to investigate the growth mechanism of YBCO crystals to obtain a high JC film by controlling the crystal structures. In this study, YBCO films were fabricated under various Ba concentrations in the TFA starting solution, and the influences of Ba composition on the growth process and microstructures were investigated. As a result, the Ba-poor YBCO film with Ba/Y = 1.5 and high JC had less a-axis oriented Y123 in comparison with the film with Ba/Y = 2. Furthermore, pores in the Ba-poor film were less than that in the stoichiometric composition film. This decrease of pores in the Ba-poor film was considered to be caused by the smaller size of non-reacted phases especially such as Ba-F rich particles entrapped by growing Y123 in the growing Y123 layer. It is considered that both the reductions of a-axis oriented Y123 and pores were the reasons of improving JC values in Ba-poor film

  9. Hydrothermal synthesis of pure BaFe12O19 hexaferrite nanoplatelets under high alkaline system

    International Nuclear Information System (INIS)

    To our best knowledge, it is the first time to synthesize the single-phase BaFe12O19 hexaferrite by the single hydrothermal method at 220 °C. Meanwhile, effects of Fe/Ba ratio and KOH amount were also investigated. It was found that the proper Fe/Ba ratio could suppress the intermediate phase, such as α-Fe2O3 and BaFe2O4. One thing to be mentioned is that high alkaline system may be a key factor to prepare BaFe12O19 hexaferrite with even disk-like shape and narrow size distribution. The optimum Fe/Ba mole ratio is identified as 8:1, and the optimum dosage of KOH was 4.0 g for the preparation of single-phase BaFe12O19. Furthermore, the formation mechanism of disk-like BaFe12O19 hexaferrite was also discussed. - Highlights: ► Single-phase BaFe12O19 hexaferrite was synthesized by the single hydrothermal method. ► The only Fe/Ba mole ratio is identified as 8:1. ► The optimum amount of KOH was 4.0 g. ► Formation mechanism of disk-like shape for BaFe12O19 hexaferrite was discussed

  10. Synthesis and characterization of BaTiO3 ferroelectric material

    International Nuclear Information System (INIS)

    BaTiO3 powder was prepared at low temperatures using the solid-state reaction, starting with two different precursors; the BaCO3/TiO2 and the Ba(NO3)2/TiO2 powder mixtures. It was found that, a single phase BaTiO3 was formed after calcination at 750 degree C for 10 h and at 600 degree C for 6 h for the first and second mixtures, respectively. Thermal and XRD analyses were used to study the formation kinetics of BaTiO3. Contracting volume reaction model was found to control both reactions. The SEM of the as milled powder, TMA, TG and thermodynamics analysis have been used to propose a realistic approach describing the reaction mechanism of BaTiO3. Characterization and the dielectric properties of the sintered BaTiO3 were investigated. The relative permittivity and the dielectric loss measured at room temperature and at 1 khz were 2028.5 and 0.043 for BaTiO3 prepared from BaCO3/TiO2, while they were 1805.33 and 0.41 for BaTiO3 prepared from Ba(NO3)2/TiO2.

  11. Synthesis and optical properties of erbium-doped BaF2 nanoparticles

    International Nuclear Information System (INIS)

    Erbium-doped BaF2 nanoparticles were prepared using the ultrasonic surge method. The particles were characterized by X-ray diffraction, transmission electron microscope, photoluminescence and absorption. The results show that when Er3+ ions were introduced into the BaF2 lattice, cubic fluorite-type Ba1−xErxF2+x solid solution, x = 0.42 was formed. Furthermore, the crystalline phase of Ba1−xErxF2+x solid solution was largely influenced by the annealing temperature. - Highlights: • We report the synthesis of BaF2:Er3+ nanoparticles by the ultrasonic surge method under normal temperature. • The Er3+ ions was introduced into the BaF2 lattice, formed cubic fluorite-type Ba1−xErxF2+x solid solution, x∼ 0.4″. • The crystalline phase was largely influenced by the annealing temperature

  12. Growth of BaTiO3-PVDF composite thick films by using aerosol deposition

    Science.gov (United States)

    Cho, Sung Hwan; Yoon, Young Joon

    2016-01-01

    Barium titanate (BaTiO3)-polyvinylidene fluoride (PVDF) composite thick films were grown by using aerosol deposition at room temperature with BaTiO3 and PVDF powders. To produce a uniform composition in ceramic and polymer composite films, which show a substantial difference in specific gravity, we used PVDF-coated BaTiO3 powders as the starting materials. An examination of the microstructure confirmed that the BaTiO3 were well distributed in the PVDF matrix in the form of a 0 - 3 compound. The crystallite size in the BaTiO3-PVDF composite thick films was 5 ˜ 50 times higher than that in pure BaTiO3 thick films. PVDF plays a role in suppressing the fragmentation of BaTiO3 powder during the aerosol deposition process and in controlling the relative permittivity.

  13. Aspectos clínicos e patogenéticos da intoxicação por abamectina em bezerros Clinical and pathogenetic aspects of abamectin poisoning in calves

    Directory of Open Access Journals (Sweden)

    Josilene N. Seixas

    2006-09-01

    Full Text Available Estudaram-se os aspectos clínico-patológicos e patogenéticos verificados após a administração experimental subcutânea de diferentes doses de abamectina em nove bezerros. Também são apresentados os dados clínico-patológicos sobre a ocorrência de intoxicação iatrogênica por essa droga que resultaram em 74 mortes em bovinos nos Estados do Rio Grande do Sul, Pará, Maranhão, Paraíba e Mato Grosso do Sul. No presente estudo, dos nove bezerros submetidos à administração experimental, cinco morreram (quatro que receberam doses únicas de 6-10 vezes superior à recomendada e um que recebeu diariamente a dose terapêutica durante 11 dias. A intoxicação por abamectina induz a disfunções neurológicas, caracterizadas por uma fase inicial de hiperexcitabilidade, seguida por hipotonia muscular generalizada e depressão progressiva. Nenhuma alteração macroscópica ou microscópica foi observada no sistema nervoso central ou em qualquer outro órgão. Conclui-se que a abamectina é um medicamento que deve ser utilizado com restrições, pois há riscos de morte quando utilizado em bezerros jovens, até mesmo na dose terapêutica.Clinic-pathological aspects and the pathogenesis of experimental abamectin poisoning were studied, after subcutaneous administration of different abamectin doses in 9 calves, as well as the clini-cal and pathological aspects of 74 cases of the iatrogenic poisoning with this drug in cattle, which occurred in the states of Rio Grande do Sul, Pará, Maranhão, Paraíba and Mato Grosso do Sul. From the 9 calves submitted to experimental administration of single doses, 5 calves died (4 calves received doses 6-10 times higher than recommended, and one received the therapeutic daily dose during 11 days. Abamectin poisoning induces neurological dysfunctions, characterized by an initial phase of hyperexcitability, followed by widespread muscular hypotony and progressive depression. No macroscopic or microscopic

  14. NanoSIMS studies of Ba isotopic compositions in single presolar silicon carbide grains from AGB stars and supernovae

    Science.gov (United States)

    Marhas, K. K.; Hoppe, P.; Ott, U.

    2007-08-01

    We have studied 74 single presolar silicon carbide grains with sizes between 0.2 and 2.6 μm from the Murchison and Murray meteorites for Ba isotopic compositions using NanoSIMS. We also analyzed 7 SiC particles either consisting of sub-micron-size SiC grains or representing a morphologically and isotopically distinct subgroup. Of the 55 (likely) mainstream grains, originating from asymptotic giant branch (AGB) stars, 32 had high enough Ba contents for isotopic analysis. For 26 of them, CsHx interferences were either negligible or could be corrected with confidence. They exhibit typical s-process Ba isotopic patterns with slightly higher than solar 134Ba/136Ba and lower than solar 135,137,138Ba/136Ba ratios. Results are generally well explained in the context of neutron capture nucleosynthesis in low mass (1-3 M⊙) AGB stars and provide constraints on AGB models, by reducing the needed 13C spread from factor of ˜20 down to 2. Out of the 19 supernova X grains, three had sufficient concentrations for isotopic analysis. They tend to exhibit higher than solar 134Ba/136Ba and 138Ba/136Ba ratios, close to solar 137Ba/136Ba, and 135Ba/136Ba lower than solar but higher than in mainstream grains. This signature could indicate a mixture of n-burst type Ba with either "normal Ba" more s-process-rich than solar, or normal Ba plus weak s-process Ba. In the n-burst component Cs may have to be separated from Ba at ˜10 years after the SN explosion. Depending on predictions for its composition, another possibility is early separation (at ˜1 year) coupled with addition of some unfractionated n-burst matter. Abundances of trace elements (Sr, Zr, Cs, La, and Ce) analyzed along with Ba signify that implantation may have been an important process for their introduction.

  15. Aspectos legales del uso de drogas ilícitas en México Aspectos legais do uso de drogas ilícitas no México Illegal aspects of illicit drugs use in Mexico

    OpenAIRE

    Ruth Magdalena Gallegos Torres; Bruna Brands; Edward Adlaf; Norman Giesbrecht; Laura Simich; Maria da Gloria Miotto Wright

    2009-01-01

    El objetivo del estudio fue conocer las opiniones de un grupo de personas sobre aspectos legales en materia de adicción. Se trata de un estudio descriptivo transversal; se aplicó una encuesta estructurada, formada por 4 apartados. Uno de los criterios para participar fue que la persona no consumiera drogas y que conociera a alguien cercano que las consumía. Los datos obtenidos se procesaron en el paquete estadístico SPSS V. 14. Participaron 100 sujetos, en el cual, 75% eran del género femenin...

  16. Transtornos alimentares: o papel dos aspectos culturais no mundo contemporâneo Transtornos alimentarios: el papel de los aspectos culturales en el mundo contemporáneo Eating disorders: the role of cultural aspects in the contemporary world

    OpenAIRE

    Leticia Langlois Oliveira; Claúdio Simon Hutz

    2010-01-01

    Os transtornos alimentares são patologias caracterizadas primordialmente pelo medo mórbido de engordar. Vários são os fatores envolvidos tanto na etiologia quanto na manutenção e na gravidade dessas doenças, principalmente fatores individuais, familiares e culturais. Em relação a estes últimos, salienta-se o papel dos aspectos históricos, estéticos, midiáticos, transculturais, socioeconômicos, raciais e de gênero. Pesquisas atuais realizadas em diversas culturas demonstram a existência de uma...

  17. Synthesis, structural characterization and optical properties of new compounds: Centrosymmetric Ba2GaMQ5 (M=Sb,Bi; Q=Se,Te), Ba2InSbTe5 and noncentrosymmetric Ba2InSbSe5

    International Nuclear Information System (INIS)

    The six compounds Ba2GaMQ5 (M=Sb,Bi; Q=Se,Te) and Ba2InSbQ5 (Q=Se,Te) have been synthesized for the first time. Ba2GaMQ5 (M=Sb,Bi; Q=Se,Te) and Ba2InSbTe5 crystallize in the centrosymmetric space group Pnma, while Ba2InSbSe5 belongs to the noncentrosymmetric polar space group Cmc21. The structures of the six new compounds contain infinite 1∞[MM'Q5]4− anionic chains built by MQ4 (M′=Ga,In) tetrahedra and heavily distorted M′Q6 (M′=Sb,Bi) octahedra. Ba2InSbSe5 possesses a band gap of 1.92(5) eV and exhibits a weak powder second harmonic generation signal using the 2090 nm laser as fundamental wavelength. - Graphical abstract: Ba2InSbSe5 contains infinite 1∞[InSbSe5]4− chains which are built by corner-shared InSe4 tetrahedra chains and edge-shared SbSe6 octahedra chains connected through edge sharing . Highlights: ► Ba2GaMQ5 (M=Sb,Bi; Q=Se,Te) and Ba2InSbQ5 (Q=Se,Te) have been synthesized. ► The structures contain infinite 1∞[MM'Q5]4− (M′=Ga,In) anionic chains. ► The chains are built by distorted MQ6 (M=Sb,Bi) octahedra and M′Q4 (M′=Ga,In) tetrahedra. ► Ba2InSbSe5 exhibits a weak powder second harmonic generation signal.

  18. DIRC - A particle identification system for BaBar

    International Nuclear Information System (INIS)

    The Detection of Internally Reflected Cherenkov light (DIRC) is a novel type of Cherenkov imaging device that has been developed, built and installed as part of the BaBar detector at the asymmetric B-factory PEP-II at SLAC. The DIRC is based on total internal reflection of Cherenkov photons produced and guided within thin, rectangular quartz bars covering the barrel region of BaBar. The photon detector is an array of photomultiplier tubes covering the photon phase space at the backward end of the bars. In its first few months of operation the DIRC performance has been found to achieve the design requirements. This note presents results from cosmic-ray data and an analysis of the first beam collision runs

  19. DIRC - a particle identification system for BaBar

    International Nuclear Information System (INIS)

    The DIRC (an acronym for Detection of Internally Reflected Cherenkov light) is a novel type of Cherenkov imaging device that has been developed, built and installed as part of the BaBar detector at the asymmetric B-factory PEP-II at SLAC. The DIRC is based on total internal reflection of Cherenkov photons produced and guided within thin, rectangular quartz bars covering the barrel region of BaBar. The photon detector is an array of photomultiplier tubes covering the photon phase space at the backward end of the bars. In its first few months of operation the DIRC performance has been found to achieve the design requirements. This note presents results from cosmic ray data and an analysis of the first beam collision runs. (author)

  20. BaH molecular spectroscopy with relevance to laser cooling

    CERN Document Server

    Tarallo, M G; Zelevinsky, T

    2015-01-01

    We describe a simple experimental apparatus for laser ablation of barium monohydride (BaH) molecules and the study of their rovibrational spectra that are relevant to direct laser cooling. We present a detailed analysis of the properties of ablation plumes that can improve the understanding of surface ablation and deposition technologies. A range of absorption spectroscopy and collisional thermalization regimes has been studied. We directly measured the Franck-Condon factor of the $\\mathrm{B}^2\\Sigma^+(v'=0)\\leftarrow\\mathrm{X}^2\\Sigma^+(v"=1)$ transition. Prospects for production of a high luminosity cryogenic BaH beam are outlined. This molecule is a promising candidate for laser cooling and ultracold fragmentation, both of which are precursors to novel experiments in many-body physics and precision measurement.

  1. AMiBA: Broadband Heterodyne Cosmic Microwave Background Interferometry

    Science.gov (United States)

    Chen, Ming-Tang; Li, Chao-Te; Hwang, Yuh-Jing; Jiang, Homin; Altamirano, Pablo; Chang, Chia-Hao; Chang, Shu-Hao; Chang, Su-Wei; Chiueh, Tzi-Dar; Chu, Tah-Hsiung; Han, Chih-Chiang; Huang, Yau-De; Kesteven, Michael; Kubo, Derek; Martin-Cocher, Pierre; Oshiro, Peter; Raffin, Philippe; Wei, Tashun; Wang, Huei; Wilson, Warwick; Ho, Paul T. P.; Huang, Chih-Wei; Koch, Patrick; Liao, Yu-Wei; Lin, Kai-Yang; Liu, Guo-Chin; Molnar, Sandor M.; Nishioka, Hiroaki; Umetsu, Keiichi; Wang, Fu-Cheng; Wu, Jiun-Huei Proty

    2009-04-01

    The Y. T. Lee Array for Microwave Background (AMiBA) has reported the first results on the detection of galaxy clusters via the Sunyaev-Zel'dovich effect. The objectives required small reflectors in order to sample large-scale structures (20'), while interferometry provided modest resolutions (2'). With these constraints, we designed for the best sensitivity by utilizing the maximum possible continuum bandwidth matched to the atmospheric window at 86-102 GHz, with dual polarizations. A novel wide-band analog correlator was designed that is easily expandable for more interferometer elements. Monolithic millimeter-wave integrated circuit technology was used throughout as much as possible in order to miniaturize the components and to enhance mass production. These designs will find application in other upcoming astronomy projects. AMiBA is now in operation since 2006, and we are in the process to expand the array from seven to 13 elements.

  2. Basic study of TLD-grade KCl:Ba

    International Nuclear Information System (INIS)

    The present work involves an in depth study of the thermoluminescent (TL) behaviour of KCl:Ba containing 10-2m.f. Ba concentration. The specimens examined were subjected to different pretreatments. They were obtained by crystallisation from aqueous solution; by air-quenching after annealing at 400oC; and by quenching the melt in open air. It is found that the luminescence efficiency of the melt and quenched specimen is higher than the other two types. The irradiation of the specimens were carried out using radiation from 90Sr beta source (dose 700 rads). The TL-characteristics observed from the above stated variously pretreated specimens are discussed with respect to the defect pattern available in the specimens. (author). 6 refs., 2 figs

  3. Monitoring the BaBar Data Acquisition System

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The BaBar data acquisition system(DAQ)transports data from the detector front end eletronics to short term disk storage.A monitoring application(VMON)has been developed to monitor the one hundred and ninety computers in the dataflow system.Performance information for each CPU is collected and multicast across the existing data transport network.The packets are currently collected by a single UNIX workstation and archived.A ROOT based GUI provides control and displays the DAQ performance in real time.The same GUI is reused to recover archived VMON data,VMON has been deployed and constantly monitors the BaBar dataflow system.It has been used for diagnostics and provides input to models projecting future performance.The application has no measurable impact on data taking ,responds instantaneously on the human timescale to requests for information display,and uses only 3% of a 300MHz Sun Ultra5 CPU.

  4. Dynamic moments of inertia in Xe, Cs and Ba nuclei

    International Nuclear Information System (INIS)

    The γ-rays following the reactions induced by 12C ions on 115In, 112,117,122Sn and 123Sb targets have been investigated using six NaI(Tl) detectors in a two-dimensional arrangement. The collective moment of inertia I(2) /sub band/ of 118,122Xe, 123Cs and 128,130Ba have been extracted from the energy-correlation spectra. The behaviour of these nuclei and the observed differences are interpreted in terms of high-spin collective properties. Data are also presented on the effective moment of inertia I(2)/sub eff/ of 118Xe and 130Ba measured by sum-spectrometer techniques. 13 references

  5. NAS MARGENS DO RIO PARAÍBA DO NORTE

    OpenAIRE

    Lígia Maria Tavares da Silva

    2003-01-01

    O Rio Paraíba do Norte é o mais importante do estado, nascendo em uma das regiões mais secas e desaguando numa região de grande umidade: a Zona da Mata. Conhecer o rio Paraíba é conhecer a história do estado. A sua ocupação deu-se inicialmente na região da várzea, próxima ao litoral, ainda no século XVI, sendo o restante de suas margens ocupadas nos séculos seguintes. Este ensaio é um relato feito a partir do trabalho de campo em suas margens da nascente à foz, destacando os principais elemen...

  6. BaTMAn: Bayesian Technique for Multi-image Analysis

    CERN Document Server

    Casado, J; García-Benito, R; Guidi, G; Choudhury, O S; Bellocchi, E; Sánchez, S; Díaz, A I

    2016-01-01

    This paper describes the Bayesian Technique for Multi-image Analysis (BaTMAn), a novel image segmentation technique based on Bayesian statistics, whose main purpose is to characterize an astronomical dataset containing spatial information and perform a tessellation based on the measurements and errors provided as input. The algorithm will iteratively merge spatial elements as long as they are statistically consistent with carrying the same information (i.e. signal compatible with being identical within the errors). We illustrate its operation and performance with a set of test cases that comprises both synthetic and real Integral-Field Spectroscopic (IFS) data. Our results show that the segmentations obtained by BaTMAn adapt to the underlying structure of the data, regardless of the precise details of their morphology and the statistical properties of the noise. The quality of the recovered signal represents an improvement with respect to the input, especially in those regions where the signal is actually con...

  7. The Pentaborate Ba2LiB5O10

    International Nuclear Information System (INIS)

    The structure of the compound Ba2LiB5O10 has been established by single-crystal X-ray methods. It crystallizes in the monoclinic space group P21/m in a cell of dimensions a = 4.414(1), b = 14.576(2), c = 6.697(2) A* and β = 104.26(2)0 with Z = 2. Refinement from 2373 independent reflections affords the final residuals R = 0.021 and Rw = 0.042. The structure exhibits a unique one-dimensional polyborate anion built from two crystallographically independent BO3 groups and a distinct BO4 group that share vertices. The polyanions are bridged by a Li atom occupying a distorted tetrahedral site and a Ba atom occupying an irregular eightfold coordinate site

  8. The thermodynamic properties of Ba2SrUO6

    International Nuclear Information System (INIS)

    Standard formation enthalpy (-2940.0±8.5 kJ/mol) of the crystal Ba2SrUO6 was determined by the method of reaction calorimetry at 298.15 K. Specific heat was studied, and thermodynamic functions were calculated by the method of adiabatic calorimetry in the range of 8-330 K for the given compound. Its standard entropy (-558.6±2.1 J/(mol K)) and Gibbs formation function (-2773.5±9.0 kJ/mol) were calculated at 298.15 K. The reaction of the Ba2SrUO6 synthesis was shown to take place exothermic manner and through enthalpy contribution in the Gibbs function of the reaction

  9. Bronquiectasias: aspectos diagnósticos e terapêuticos Estudo de 170 pacientes

    Directory of Open Access Journals (Sweden)

    Moreira José da Silva

    2003-01-01

    Full Text Available INTRODUÇÃO: Bronquiectasias são freqüentemente encontradas na prática médica no Brasil, levando a significativa morbidez e comprometimento da qualidade de vida de seus portadores. OBJETIVOS: Analisar aspectos diagnósticos e terapêuticos em uma série de pacientes com bronquiectasias atendidos em um serviço de doenças pulmonares. MÉTODO: Sinais, sintomas, achados radiográficos e microbiológicos, e resultados terapêuticos foram estudados em 170 pacientes portadores de bronquiectasias hospitalizados no período de 1978 a 2001 - 62,4% do sexo feminino, 37,6% do masculino, com idade média de 37 anos, variando entre 12 e 88 anos. RESULTADOS: Antecedente de pneumonia na infância foi detectado em 52,5% dos pacientes, de tratamento tisiológico em 19,8%; 8,8% tinham asma brônquica, e dois tinham síndrome de Kartagener. Os sintomas mais comuns foram tosse (100%, expectoração (96% e estertores pulmonares (66%. As lesões eram unilaterais em 46,5% dos casos. Pneumococo, H. influenzae ou flora mista estiveram presentes em 85% das amostras de escarro examinadas. Os 170 pacientes receberam inicialmente tratamento clínico à base de antibióticos e fisioterapia respiratória; 88 deles (52% mais jovens, com lesões menores e boa reserva funcional foram submetidos à cirurgia de ressecção pulmonar (82 unilaterais e seis bilaterais. Ocorreram dois óbitos hospitalares entre os pacientes que receberam tratamento exclusivamente clínico. Os pacientes tratados cirurgicamente tiveram acentuada melhora dos sintomas, raramente necessitando ser reinternados. CONCLUSÕES: Os prolongados sintomas broncopulmonares foram permanentemente aliviados na maioria dos pacientes com bronquiectasias que puderam ir à cirurgia de ressecção pulmonar, diferentemente dos que seguiram com o tratamento clínico.

  10. Estado de situación sobre aspectos fiscales y accesibilidad del tabaco en la Argentina

    Directory of Open Access Journals (Sweden)

    Germán Rodríguez Iglesias

    2016-04-01

    Full Text Available Introducción: Las medidas fiscales tendientes al aumento de precios de los productos del tabaco son una deuda pendiente delEstado argentino para reducir su consumo y proteger la salud pública. Objetivo: Realizar una revisión del “estado del arte” en materia de aspectos económicos de la epidemia del tabaco en la Argentinay su impacto en la salud pública.Material y métodos: Se realizó una revisión narrativa presentando la evidencia acerca del impacto del incremento de preciossobre el consumo de productos del tabaco. Resultados: En la Argentina, el precio de los cigarrillos es uno de los más baratos del mundo y con una asequibilidad creciente,que se duplicó en la última década, perjudicando más a grupos de menores ingresos (aumentó un 74% la cantidad de paquetesque se podían comprar con un sueldo promedio y un 102% con un sueldo del tercil más bajo y facilitando la iniciación de niñosy niñas. Frente a esto, es necesaria una política fiscal de aumento de precios vía impuestos, ya que un incremento del 10%en los precios reales reduciría el consumo de cigarrillos en un 3%. A su vez, los aumentos de precios vía impuestos generanaumentos en la recaudación. Los fondos adicionales recaudados podrían destinarse a cubrir parte de los costos sanitarios delas enfermedades que genera el tabaco (en la actualidad duplican la recaudación, así como a generar fondos para sostenercampañas de cesación que complementen la política de impuestos y otras medidas de salud y de desarrollo sustentable. Conclusión: La Argentina debería incorporar políticas impositivas para reducir el consumo de los productos del tabaco quecomplementen las regulaciones actualmente vigentes, tendientes a reducir el consumo y su intensidad.

  11. Aspectos neurobiológicos de la psicopatía Neurobiological aspects of psychopathy

    Directory of Open Access Journals (Sweden)

    Catalina Gil Restrepo

    2004-09-01

    Full Text Available La psicopatía es un constructo psiquiátrico caracterizado por un patrón permanente de déficit afectivo y una falta de respeto por los derechos de los demás y por las normas sociales. El término equivale al “trastorno de personalidad antisocial” DSM-IV-TR y al “Trastorno disocial de personalidad” de la Clasificación Internacional de Enfermedades (CIE-10. Los individuos afectados comienzan a presentar características psicopáticas desde la niñez, son propensos a involucrarse en conductas criminales pero no a resocializarse con los programas penitenciarios, y reinciden con más rapidez, crueldad y violencia que los criminales no psicópatas. La etiopatogenia parece basarse en la interacción compleja de factores biológicos y psicosociales. El objetivo del presente artículo es presentar una revisión actualizada de los aspectos neurobiológicos de la psicopatía entre los cuales se encuentran los obstétricos, neuroanatómicos, neuroquímicos y genéticos. Psychopathy is a psychiatric construct characterized by a permanent pattern of affective deficit, and a lack of respect for the rights of other people and the social norms. The term is equivalent to the “Antisocial personality disorder” of the DSMIV-TR, and to the “Dissocial personality disorder” of the CIE-10. Since childhood, the affected individuals begin to display psychopathic characteristics and they have tendency to become involved in criminal behaviors but not to resocialice themselves with penitentiary programs; they reoffend more rapidly, with more cruelty and violence than non-psychopathic criminals. Etiopathogenesis of psychopathy is based on the complex interaction of biological and psychosocial factors. The objective of the present article is to provide an updated review about the neurobiological aspects of psychopathy among them the obstetric, neuroanatomical, neurochemical and genetic.

  12. Aspectos epidemiológicos de las mordeduras caninas Epidemiological aspects of dog bites

    Directory of Open Access Journals (Sweden)

    Jorge Palacio

    2005-02-01

    Full Text Available Las mordeduras de animales a personas suponen un importante problema de salud pública. Dentro de éstas, las más frecuentes son las producidas por perros. Un primer paso necesario en la prevención de este tipo de accidentes es conocer los factores de riesgo implicados. El presente trabajo revisa la bibliografía más relevante en cuanto a la incidencia, los factores de riesgo y la prevención de las mordeduras de perros en personas. Así, según las características de las víctimas, se revisan determinados aspectos, como la edad, el sexo, la localización y la gravedad de las lesiones. En relación con los perros agresores, se describen las razas implicadas y el historial previo del animal. Igualmente, se describen los contextos en que se producen las mordeduras, en relación con la fecha, el número de perros, los lugares más frecuentes, la relación e interacción víctima-perro y la participación de las distintas categorías de agresividad del etograma canino. En el último apartado se recogen las recomendaciones más habituales halladas en la bibliografía para prevenir y reducir la incidencia de mordeduras sobre la población general.Animal bites in humans are an important public health problem. Most of these bites are dog bites. The first step in preventing this kind of accident is to identify the associated risk factors. The present article reviews the most important published articles on the incidence of dog bites, their risk factors, and preventive measures. Concerning victim profiles, features such as age, sex, location, and the severity of the wounds are reviewed. Regarding dogs, the most frequent breeds involved and the dog's previous history of aggression are described. In addition, the different contexts in which bites occur are reported. Thus, factors such as dates, number of dogs, places, victim-dog relationship and interaction, and the distinct involved categories of aggression of the canine ethogram are reviewed. The most

  13. ASPECTOS DA OPINIÃO PÚBLICA SOBRE A LEGALIZAÇÃO DO ABORTO

    Directory of Open Access Journals (Sweden)

    ROSSINI, E. Q.

    2015-12-01

    Full Text Available A prática do aborto é considerada crime, de acordo com o Código Penal Brasileiro de 1940. O abortamento é juridicamente permitido apenas em casos de violência sexual, risco à vida da mulher ou com comprovação de anencefalia fetal. O abortamento significa um grave problema para a saúde pública nos países em desenvolvimento, e, também no Brasil, resultando em um debate heterogêneo que é pautado por diversos aspectos legais, morais, religiosos, sociais e culturais. (Ministério da Saúde, 2011. Neste contexto nosso objetivo foi levantar informações acerca da opinião de moradores da cidade de Campos dos Goytacazes, acerca do aborto. Utilizou-se questionário fechado com escala tipo likert composto por 3 questões numa amostra de 40 pessoas escolhidas aleatoriamente. Os questionários foram aplicados em locais públicos e nas imediações do ISECENSA. A idade média dos sujeitos de pesquisa foi de 27 anos, todos maiores de 18 anos e a distribuição por gênero foi 60% gênero femininos e 40% masculino. Da amostra 55% dos sujeitos discordaram acerca da legalização do aborto e os que concordaram somaram 32,5% da amostra. Acerca da totalidade dos participantes que concordaram que haveria um aumento na procura pelo aborto, caso o mesmo fosse regulamentado somaram-se 50%, e os que discordaram acerca deste aumento somou-se 27,5%. Perguntou-se aos sujeitos de pesquisa em qual circunstância seria justificável o aborto. As respostas variaram bastante. Dentro das respostas oferecidas o resultado foi: Estupro 27,5%, Risco à vida da mãe ou do feto 27,5%, Gravidez indesejada 7,5%, Todas as respostas anteriores 25% e em nenhum dos casos 12,5%. Ressaltamos a importância de que a criminalização do abortamento seja debatida de forma ampla pela sociedade por um viés da saúde pública e da justiça social. Percebeu-se que a temática é fortemente enviesada por questões morais. Acreditamos que novas pesquisas envolvendo metodologia

  14. Aspectos ultraestruturais do processo de divisão do Toxoplasma gondii

    Directory of Open Access Journals (Sweden)

    Wanderley de Souza

    1974-02-01

    Full Text Available Neste trabalho é feita uma revisão sobre alguns aspectos biológicos do Toxoplasma gondii, principalmente sobre a ultraestrutura da forma interfásica e as modificações ultraestruturais que ocorrem no parasito durante o seu processo de divisão. Considera-se inicialmente o processo de divisão binária admitindo-se, porém, a possibilidade de que as imagens interpretadas como senão de divisão binária representem estágios da divisão por endodiogenia. Quanto à endodiogenia descrevem-se as alterações que ocorrem na "parasito mãe" durante o processo de formação dos dois "parasitos filhos". Este processo é semelhante no Toxoplasma gondii, Besnoitia jellisoni, Sarcocystis tenella e Frenkelia. Discute-se a possibilidade da formação de mais de dois "parasitos filhos" por um processo de endopoligenia, bem como o processo de esquizogonia. Os resultados mais recentes mostram que não existe esquizogonia nas formas vsgetativas do Toxoplasma gondii, senão que as imagens interpretadas como tal, ao microscópio ótico, são o resultado de endodiogenias sucessivas em que os endozoitas formados permanecem ligados entre si pela região posterior. A esquizogonia é, no entanto, encontrada nas formas que se desenvolvem no interior de células epiteliais do intestino do gato, que é o hospedeiro definitivo do Toxoplasma gondii. Discute-se o conceito de esquizogonia, comparando-o em três protozoários: Eimeria bovis, E. callospermophili e Plasmodium juxtanucleare, que apresentam diferenças entre si quanto ao processo de iniciação da individualização dos "parasitos filhos". Refere-se à recente hipótese que considera a endodiogenia como o processo fundamental de divisão dos esporozoárlos, ocorrendo na fase final da esquizogonia. Finalmente é acentuado o papel que a microscopia eletrônica aliada às modernas técnicas de citoquímica e imunocitoquimica poderá desempenhar no sentido de um melhor conhecimento da biologia do Toxoplasma

  15. ASPECTOS CELULARES Y MOLECULARES INVOLUCRADOS EN LA EVOLUCIÓN DE ESTRUCTURAS CRANEOFACIALES

    Directory of Open Access Journals (Sweden)

    Belfran Alcides Carbonell medina

    2011-12-01

    Full Text Available Normal 0 21 false false false ES-CO X-NONE X-NONE /* 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-priority:99; mso-style-qformat: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:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} La cabeza de los vertebrados ha sido considerada como una de las principales innovaciones en el proceso evolutivo de los vertebrados y de su distinción craneofacial con el resto de cordados no vertebrados. Muchas estructuras craneofaciales como dientes (pulpa y dentina, maxilares, cartílagos, esqueleto craneofacial y órganos sensoriales son derivadas de las células de la cresta neural (CCN; estas células aportaron en gran medida el patronamiento para la evolución y el desarrollo del complejo craneofacial. La evolución de estas estructuras se llevo a cabo principalmente por la evolución misma de las células de la cresta neural y la duplicación de varios genes involucrados en la delaminación y migración de este grupo de células. La siguiente revisión fue realizada con el objetivo de profundizar en los diferentes aspectos celulares y moleculares involucrados en la evolución de las estructuras craneofaciales.

  16. The BaBar Electromagnetic Calorimeter: Status and Performance Improvements

    OpenAIRE

    Bauer, Johannes M.; Group, for the BaBar Collaboration EMC

    2006-01-01

    The electromagnetic calorimeter at the BaBar detector, part of the asymmetric B Factory at SLAC, measures photons in the energy range from 20 MeV to 8 GeV with high resolution. The current status of the calorimeter, now in its seventh year of operation, is being presented, as well as details on improvements made to the analysis code during the last years.

  17. Cluster radioactivity in $^{114}$Ba in the HFB theory

    OpenAIRE

    Warda, M.

    2011-01-01

    Cluster radioactivity in $^{114}$Ba is described as a spontaneous fission with a large mass asymmetry within the self-consistent HFB theory. A new fission valley with large octupole deformation is found in the potential energy surface. The fragment mass asymmetry of this fission mode corresponds to the expected one in cluster radioactivity with the emission of $^{16}$O predicted with a very long half-life.

  18. EXCITATION AND IONIZATION OF LASER-PUMPED Ba VAPOUR

    OpenAIRE

    Huber, M.; Jahreiss, L.

    1985-01-01

    We describe the excitation and ionization of dense Ba vapour (1019 to 2021 m-3) by resonant (λ = 553.5 nm) laser radiation and discuss the processes responsible for the transfer of energy from the laser-excited atoms into ionization. Ionization was found to be density-dependent and this pointed to collision-dominated ionization mechanisms. It has been established that seed electrons were heated in superelastic collisions with laser-excited atoms, and that subsequent electron-impact excitation...

  19. The BaBar detector: Upgrades, operation and performance

    OpenAIRE

    Aubert, B.; Barate, R.; Boutigny, D; Couderc, F.; del Amo Sanchez, P; Gaillard, JM; Hicheur, A.; Karyotakis, Y.; Lees, JP; Poireau, V.; X. Prudent; Robbe, P.; Tisserand, V.; Zghiche, A.; Grauges, E.

    2013-01-01

    The BaBar detector operated successfully at the PEP-II asymmetric e +e- collider at the SLAC National Accelerator Laboratory from 1999 to 2008. This report covers upgrades, operation, and performance of the collider and the detector systems, as well as the trigger, online and offline computing, and aspects of event reconstruction since the beginning of data taking. © 2013 Elsevier B.V.

  20. Performance test of large BaF2 detector

    International Nuclear Information System (INIS)

    The γ total absorption facility (GTAF) was being built in China Institute of Atomic Energy (CIAE). It was composed of 40 BaF2 detector modules. The performance of every single module, such as detector construction, choosing of crystal packaging condition, energy resolution, time resolution, and long time stability were tested. From the energy resolution and time resolution test, it shows that the detector modules are good for using in neutron capture cross section measurement. (authors)

  1. New 120 K Tl-Ca-Ba-Cu-O superconductor

    International Nuclear Information System (INIS)

    Electronic and magnetic properties of the new 120 K Tl-Ca-Ba-Cu-O superconductor are presented. Resistance-temperature variations, ac susceptibility, and the (low) magnetic field dependence of the critical current density are reported. The new superconductor can be prepared in a molten state, which should allow processing leading to high critical current density. Preliminary x-ray diffraction data are also presented

  2. Particle identification using the DIRC in BaBar

    International Nuclear Information System (INIS)

    The BaBar DIRC runs extremely well at design luminosities, providing excellent PID in both ring and veto modes. Machine backgrounds expected as PEP-II goes to much higher luminosities (1034 cm2·s-1 or more) in the next 5 years will require faster data acquisition electronics and further shielding of the SOB from low energy machine produced gamma rays

  3. Observing the CMB with the AMiBA

    OpenAIRE

    Subrahmanyan, Ravi

    2001-01-01

    I discuss the capabilities and limitations of the AMiBA for imaging CMB anisotropies. Michael Kesteven (ATNF-CSIRO) has proposed drift-scanning as an observing strategy for measuring and rejecting any instrumental response that the close-packed interferometers may have to the local environment. The advantages of mosaic imaging CMB anisotropies using a co-mounted interferometric array in a drift-scanning observing mode are discussed. A particular case of mosaic imaging a sky strip using a two-...

  4. Standardization of 137 Cs+137m Ba by Liquid Scintillation

    International Nuclear Information System (INIS)

    A procedure for the preparation of a stable, homogeneous solution of ''137 Cs+''137m Ba, for use in liquid scintillation measurements, is described. Its count rate stability and spectral time evolution has been followed for several weeks. The solution has been standardised by the CIEMAT/NIST method in both Ultima-Gold and Insta-Gel, to a combined uncertainty lower than 0,51% (k=1)

  5. TlBaCaCuO High Temperature Superconducting Bolometer

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    Meanders of thin films of TlBa2Ca2CuO2 have been used to make radiation bolometers. Using cw-HeNeat 632 nm the peak responsivity of these films is measured to be 0. 560 V/W at the temperature of 106.0 K. Thepresent experimental data agree well with bolometric response of irradiated films, and the calculations are presentedto support this conclusion.

  6. Quarkonium Spectroscopy and New States from BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Vitale, L.; /Trieste U. /INFN, Trieste

    2007-06-08

    We review results on charmonium and bottomonium spectroscopy by the BaBar experiment at the PEP-II e{sup +}e{sup -} collider at SLAC. More space is reserved to the new results like the observation of hadronic non-B{bar B} {Upsilon}(4S) decays and the investigation on the production and decay properties of the recently discovered charmonium-like states X(3872) and Y (4260). These results are preliminary, unless otherwise specified.

  7. Fragebogen zur Identifikation von Wissensbarrieren in Organisationen (WiBa)

    OpenAIRE

    Hopf, Susanne

    2009-01-01

    Das vorliegende Instrument – der Fragebogen zur Identifikation von Wissensbarrieren (WiBa) – misst den Umgang mit Wissen und Wissensbarrieren in Organisationen. Es lehnt sich in seiner Struktur an die Bausteine des Wissensmanagements von Probst, Raub und Romhardt (1997, 2006) an, die eine Art Lebenslauf von Wissen abbilden. Die 14 Skalen des Fragebogens decken die Themenfelder transaktives Wissen, Informationsverlust, interne Wissensbeschaffung, externe Wissensbeschaffung, Bedeutung von Wisse...

  8. Calibration of 133Ba by Sum-Peak Method

    International Nuclear Information System (INIS)

    A calibration laboratory should have several methods of measurement in order to ensure robustness on the values applied. The National Laboratory for Metrology of Ionizing Radiation, (LNMRI IRD), provides gamma sources of radionuclide in various geometries and standardized in activity with reduced uncertainties. Some absolute and relative methods of calibrations could be used routinely. Relative methods require standards to determine the activity of sample to be calibrated, while the absolute methods do not need, simply make the counting and the calculation of the activity is obtained directly. The great advantage of calibrations of radionuclides by absolute method is the accuracy and low uncertainties. 133Ba is a radionuclide enough used in research laboratories and calibration of detectors for environmental analysis and, according to the scheme, it decays 100% by electron capture and emits about 14 energy gamma and X-ray lines, forming several coincidences. However, the classical methods of absolute measurement, as coincidence 4 πβ-γ have difficulty to calibrate 133Ba due to its complex decay scheme. The sum-peak method, developed by Brickman, could allow this calibration. It is used for radionuclide calibration that emits at least two photons in coincidence. Therefore, it was developed a methodology that combines gamma spectrometry technique with sum-peak method to standardize 133Ba samples. Activity results obtained proved compatible, with uncertainties of less than 1%, and, when compared with other methods of calibration, sum-peak demonstrated the feasibility of this methodology, particularly, for simplicity and effectiveness. (author)

  9. Synthesis and characterization of (Ba,Yb doped ceria nanopowders

    Directory of Open Access Journals (Sweden)

    Branko Matović

    2011-06-01

    Full Text Available Nanometric size (Ba, Yb doped ceria powders with fluorite-type structure were obtained by applying selfpropagating room temperature methods. Tailored composition was: Ce0.95−xBa0.05YbxO2−δ with fixed amount of Ba − 0.05 and varying Yb content “x” from 0.05 to 0.2. Powder properties such as crystallite and particle size and lattice parameters have been studied. Röntgen diffraction analyses (XRD were used to characterize the samples at room temperature. Also, high temperature treatment (up to 1550°C was used to follow stability of solid solutions. The mean diameters of the nanocrystals are determined from the full width at half maxima (FWHM of the XRD peaks. It was found that average diameter of crystallites is less than 3 nm. WilliamsonHall plots were used to separate the effect of the size and strain in the nanocrystals.

  10. Analysis of Jupiter's Oval BA: A Streamlined Approach

    Science.gov (United States)

    Sussman, Michael G.; Chanover, Nancy J.; Simon-Miller, Amy A.; Vasavada, Ashwin R.; Beebe, Reta F.

    2010-01-01

    We present a novel method of constructing streamlines to derive wind speeds within jovian vortices and demonstrate its application to Oval BA for 2001 pre-reddened Cassini flyby data, 2007 post-reddened New Horizons flyby data, and 1998 Galileo data of precursor Oval DE. Our method, while automated, attempts to combine the advantages of both automated and manual cloud tracking methods. The southern maximum wind speed of Oval BA does not show significant changes between these data sets to within our measurement uncertainty. The northern maximum dries appear to have increased in strength during this time interval, tvhich likely correlates with the oval's return to a symmetric shape. We demonstrate how the use of closed streamlines can provide measurements of vorticity averaged over the encircled area with no a priori assumptions concerning oval shape. We find increased averaged interior vorticity between pre- and post-reddened Oval BA, with the precursor Oval DE occupying a middle value of vorticity between these two.

  11. Upconversion emission of BaTiO3:Er nanocrystals

    Indian Academy of Sciences (India)

    Pushpal Ghosh; Suparna Sadhu; Tapasi Sen; Amitava Patra

    2008-06-01

    Here, we report the dopant concentration and pump-power dependence upconversion emission properties of erbium doped BaTiO3 nanocrystals derived from sol–emulsion–gel method. Green (550 nm) and red (670 nm) upconversion emissions were observed at room temperature from the ${}^{4}S_{3/2}$ and ${}^{4}F_{9/2}$ levels of Er3+ : BaTiO3 nanocrystals. It is found that at 850 mW of cw excitation power (at 980 nm) the total luminescence was 17130 Cd/m2 for 1000°C heated 0.25 mol% Er-doped BaTiO3 nanocrystals. It is worthwhile to mention that the unusual power-dependent upconversion luminescence (saturation) is observed at higher dopant concentration (2.5 mol%) and high pump power. Our analysis confirms that the depletion of the excited state is responsible for the relevant fluorescence upconversion. We have again confirmed that a twophoton excited state absorption process occurs for all samples.

  12. Revisiting the β-decay of 139Ba

    International Nuclear Information System (INIS)

    Spectroscopy of 139La is important for understanding the collective and the single particle states as it is one of the nuclei with N = 82 shell closure. The energy levels of 139La had been investigated either by the EC (electron capture) of 139Ce or by the γ-decay of 139Ba. As the QEC for 139Ce is 270 keV, only the ground and the first excited states in 139La are populated, thus only a limited information can be established from this decay-mode. On the other hand in 139Ba: approximately 99.7% of its β decay populates the ground and the first excited states in 139La, only a small fraction populates the other levels. These facts have been reflected in the scarcity of detailed experimental information on other/higher excited levels of 139La, which has led to certain discrepancies in the previous works. In the present work, the β-decay of 139Ba has been investigated, to obtain information on the energy levels and associated γ-rays of the daughter 139La

  13. The BaBar Software Architecture and Infrastructure

    International Nuclear Information System (INIS)

    The BaBar experiment has in place since 1995 a software release system (SRT Software Release Tools) based on CVS (Concurrent Version System) which is in common for all the software developed for the experiment, online or offline, simulation or reconstruction. A software release is a snapshot of all BaBar code (online, offline, utilities, scripts, makefiles, etc.). This set of code is tested to work together, and is indexed by a release number (e.g., 6.8.2) so a user can refer to a particular release and get reproducible results. A release will involve particular versions of packages. A package generally consists of a set of code for a particular task, together with a GNU makefile, scripts and documentation. All BaBar software is maintained in AFS (Andrew File System) directories, so the code is accessible worldwide within the Collaboration. The combination SRT, CVS, AFS, has demonstrated to be a valid, powerful and efficient way of organizing the software infrastructure of a modern HEP experiment with collaborating Institutes distributed worldwide, both in a development and production phase

  14. Measurement of the cross sections for Ba isotopes

    International Nuclear Information System (INIS)

    Present experiment was performed in order to get more information about intermediate energy heavy ion collisions for the further understanding of that how nuclear reaction mechanisms change between the two extreme types of nuclear behaviors, the nuclear collisions at low and high energy. Ba isotopes were produced by 60 MeV/u 18O bombardment of nature uranium via 238U(18O, X) reaction, and then separated from the irradiated U targets by using radiochemical procedure. The accumulative sections of Ba isotopes are obtained through the processing and analyzing of time sequence γ-ray spectra. As a result, the two-peak phenomenon in the distribution of the Ba isotopes is observed. It can be presumed that the occurrence of the double Gaussian distribution is weakly related to the projectile energy, but closely related to the projectile-target combination. Present experiment also implied however, that fragmentation reaction induced by intermediate energy heavy ions followed by radiochemical separation is an efficacious method to produce nuclei far from stability, thereby to study their decay properties

  15. Fabrication of porous BaSnO3 hollow architectures using BaCO3-SnO2 core-shell nanorods as precursors

    International Nuclear Information System (INIS)

    We present a strategy to synthesize porous BaSnO3 hollow architectures with that were 150-300 nm in diameter and 1.5-5 μm in length using precursor of BaCO3-SnO2 nanorods prepared by hydrothermal treatment. BaCO3-SnO2 nanorods, consisting of a BaCO3 core and a SnO2 shell, could be used effectively for the solid-state synthesis of polycrystalline BaSnO3 powder at 800 deg. C (lower than convention for BaCO3 and SnO2 mixtures). The core/shell structure of the precursor could play a role as a structural directing template for preparing BaSnO3 hollow architectures during the calcination process. The X-ray diffractometer (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM) are employed to characterize the structures and morphologies. When applied to DSSC, the porous BaSnO3 hollow architectures exhibit distinct photovoltaic effect.

  16. Aspectos psicológicos y sociológicos en la alimentación de los deportistas

    OpenAIRE

    Martínez Sanz, José Miguel; Urdampilleta Otegui, Aritz; Mico, L.; Soriano, J.M.

    2012-01-01

    Con el presente artículo queremos describir mediante una revisión bibliográfica los aspectos que caracterizan los hábitos alimentarios en los deportistas y su relación con la optimización del rendimiento y el mantenimiento del estado de salud del deportista. Los factores que influyen en la educación alimentaria del deportista son varios: hábitos alimentarios de la infancia y adolescencia, suplementación en el deporte, trastornos del comportamiento alimentario y deportistas de alto rendimiento...

  17. Algunos aspectos técnicos sobre la liofilización de pulpa de cocona (Solanum sessiliflorum Dunal)

    OpenAIRE

    Leynard Natividad Marín; José Ramón Cáceres Paredes

    2013-01-01

    La cocona (Solanum sessiliflorum Dunal) es una fruta ampliamente distribuida en la Amazonia Sudamericana, con buenas características nutricionales y antioxidantes. El objetivo de este trabajo fue deshidratar la pulpa de cocona mediante liofilización para evaluar algunos aspectos técnicos de un nuevo tipo de producto que permita su mejor comercialización y mayores usos en la industria alimentaria. Los frutos fueron adquiridos en el Mercado Central de Frutas de Lima (Perú) y procesados en el Ce...

  18. Aspectos deontológicos, éticos y legales en la intervención psicológica

    OpenAIRE

    Bados López, Arturo

    2008-01-01

    Se describen los principios éticos fundamentales a tener en cuenta en la intervención psicológica, así como las competencias legales y responsabilidades legales de los psicólogos clínicos en España. Posteriormente, se tratan una serie de cuestiones deontológicas, éticas y legales importantes en la práctica clínica y que atañen a aspectos como la competencia, la historia clínica, la confidencialidad, el consentimiento informado, los internamientos no voluntarios, las relaciones duales y los ho...

  19. Aspectos economicos do controle de Thyrinteina arnobia (Stoll, 1782) (Lep.: Geometridae) com bacillus thuringiensis (Berliner) em povoamentos de Eucalyptus spp.

    OpenAIRE

    Branco, Edward Fagundes

    2013-01-01

    Resumo: Este trabalho foi desenvolvido com o objetivo básico de estudar aspectos econômicos do controle de lagartas desfolhadoras da espécie Thyrinteina arnobia, com esporos da bactéria Bacillus thuringiensis, em povoamentos de Eucalyptus grandis e Eucalyptus urophylla. As diferenças estatísticas entre os parâmetros dendrométricos utilizados também foram estudados. Trabalhou-se com levantamentos dendrométricos oriundos de 4 inventários contínuos, agrupados em três épocas distintas: anos antes...

  20. Aspectos do comportamento de polímeros em condições de incêndio

    OpenAIRE

    Jorge B. Gallo; José A. M. Agnelli

    1998-01-01

    RESUMO: No presente trabalho apresentaremos uma revisão do comportamento dos polímeros quando queimados, procurando enfocar o antagonismo comumente observado entre os aspectos de retardância de chama e emissão de fumaça dos compostos desenvolvidos com vistas à prevenção de incêndio. Apresentaremos também uma breve descrição de alguns testes comumente empregados e uma lista das principais normas internacionais, relevantes para a caracterização dos materiais em relação ao fogo.ABSTRACT: In this...

  1. Aspectos internacionales de la protección de datos: las sentencias Schrems y Weltimmo del Tribunal de Justicia

    OpenAIRE

    De Miguel Asensio, Pedro Alberto

    2016-01-01

    Análisis de dos recientes sentencias del Tribunal de Justicia de gran importancia en relación con los aspectos internacionales de la protección de datos personales. La sentenicia Schrems declara la invalidez de los principios de puerto seguro, un mecanismo fundamental del entramado que facilitaba las transferencias internacionales de datos desde la UE a EEUU, al que han venido estando adheridas los principales prestadores de servicios de Internet, como redes sociales, correo electrónico o mot...

  2. Aspectos microestructurales y posibles usos del maíz de acuerdo con su origen geográfico

    OpenAIRE

    Ernesto David Narváez González; Juan de Dios Figueroa Cárdenas; Suketoshi Taba

    2007-01-01

    La mayoría de los estudios microestructurales del maíz se han orientado a la industria de los almidones y pocos se han relacionado con alimentos o calidad de tortilla. Se estudió la relación entre la microestructura del grano y las propiedades funcionales de razas de maíz de América Latina, y su posible uso de acuerdo con la zona geográfica. Se analizaron aspectos microestructurales, como grado de compactación de los cuerpos celulares del endospermo, tamaño y morfología del ...

  3. ASPECTOS ECONOMICOS DA SUBSTITUICAO DE FONTES CONVENCIONAIS DE ENERGIA POR BIOGAS EM ASSENTAMENTO RURAL DO ESTADO DE SAO PAULO.

    OpenAIRE

    Esperancini, Maura Seiko Tsutsui; Colen, Fernando; Bueno, Osmar De Carvalho; Simon, Elias Jose

    2006-01-01

    Existem hoje diversas alternativas tecnológicas de aproveitamento da biomassa para geração de energia, tecnicamente viáveis para pequenas e médias produções. Uma destas alternativas que vem despertando grande interesse é a tecnologia de biodigestão anaeróbia de resíduos animais, e particularmente de resíduos suínos e bovinos, pela implantação de biodigestores. O objetivo deste estudo foi avaliar aspectos econômicos da implantação de biodigestor com o uso de dejetos animais no assentamento rur...

  4. Informatización del proceso editorial del semanario ¡ahora!, aspectos tecnológicos y empresariales

    OpenAIRE

    María del Carmen Rodríguez Hernández; Ángel Alejandro Zaldívar Pino

    2010-01-01

    Se abordaron aspectos relevantes del proceso ingenieril como los criterios inmersos en las tecnologías de desarrollo, base de datos, arquitectura de despliegue y concepciones de seguridad de información en el entorno de integración; expuestos desde la perspectiva de la gestión de información de las rutinas productivas inmersas en el proceso editorial de un semanario. El flujo y gestión de la información entre los diversos entes transitan por diversas fases y de modo bidireccional. Esa dinámic...

  5. Aspectos farmacológicos en el manejo reproductivo de la perra. Revisión bibliográfica

    OpenAIRE

    J. Echeverría

    2005-01-01

    La fisiología de la reproducción ha experimentado en los últimos años grandes adelantos. La profundización en el conocimiento de los mecanismos íntimos de acción de las hormonas sexuales, desde su llegada al tejido blanco hasta el desencadenamiento de la serie de eventos moleculares que configuran una respuesta efectiva, ha dado por resultado un mejor acercamiento en lo que respecta a diferentes aspectos terapéuticos. Por su naturaleza, el estudio de la reproducción requiere un entendimiento ...

  6. Malária pulmonar: aspectos na tomografia computadorizada de alta resolução - relato de caso

    Directory of Open Access Journals (Sweden)

    Rodrigues Rosana

    2004-01-01

    Full Text Available Neste trabalho é relatado o caso de paciente do sexo masculino, de 38 anos de idade, que desenvolveu quadro de malária com comprometimento pulmonar. A tomografia computadorizada de alta resolução evidenciou espessamento de septos interlobulares e de bainhas peribroncovasculares, com áreas esparsas de atenuação em vidro fosco e de consolidações, além de derrame pleural bilateral, aspectos compatíveis com edema pulmonar. O paciente recebeu tratamento específico, evoluindo bem e tendo alta 11 dias após a internação.

  7. Malária pulmonar: aspectos na tomografia computadorizada de alta resolução - relato de caso

    OpenAIRE

    Rodrigues Rosana; Marchiori Edson; Souza Daniel Andrade Tinoco de

    2004-01-01

    Neste trabalho é relatado o caso de paciente do sexo masculino, de 38 anos de idade, que desenvolveu quadro de malária com comprometimento pulmonar. A tomografia computadorizada de alta resolução evidenciou espessamento de septos interlobulares e de bainhas peribroncovasculares, com áreas esparsas de atenuação em vidro fosco e de consolidações, além de derrame pleural bilateral, aspectos compatíveis com edema pulmonar. O paciente recebeu tratamento específico, evoluindo bem e tendo alta 11 di...

  8. Coccidiosis hepática en el conejo: aspectos ambientales y clínico-patológicos

    OpenAIRE

    Mario Pérez Martínez; Miguel Angel Betancourt Alonso

    2010-01-01

    La cunicultura es una industria creciente en México. De las 13 especies de coccidias que afectan a los conejos, la Eimeria stiedae es el principal agente causal de la coccidiosis hepática en el conejo. En la presente revisión se aborda la importancia del medio ambiente y aspectos clínico- patológicos de la coccidiosis hepática en conejos. Como resultado de la revisión de la literatura disponible se observa la necesidad de abordar el estudio de la coccidiosis hepática del conejo de manera inte...

  9. Aspectos histológicos de Kochia scoparia (L.) Schrader. Hipótesis sobre la ontogenia

    OpenAIRE

    Alonso Beato, María Teresa

    1989-01-01

    [ES] En el presente trabajo se describen ciertos aspectos estructurales y ontogenéticos de Kochia scoparia (L.) Schrader. Se estudian diversas etapas del desarrollo embrionario, apreciándose una asincronía marcada durante el proceso de elongación. Se analiza la ontogenia del sistema vascular. Se estudia la extensión del área de transición. Del análisis del desarrollo de las semillas se deduce la existencia inicial de tres sistemas vasculares separados en la plántula, que posteriormente contac...

  10. Aspectos de la dinámica poblacional de la ballena azul (Balaenoptera musculus) del Pacífico Noreste

    OpenAIRE

    ORTEGA ORTIZ, CHRISTIAN DANIEL

    2009-01-01

    En este estudio se determinaron aspectos de la dinámica poblacional y una estimación preliminar del estado actual de la población de ballena azul (Balaenoptera musculus) del Pacífico Noreste, a partir de datos de longitud total obtenidos con un método fotogramétrico (fotosecuencias) nuevo. Este método consistió en fotografiar de forma secuencial todo el cuerpo visible de la ballena y simultáneamente medir la distancia perpendicular entre la ballena y la embarcación para hacer una escala de me...

  11. Aspectos de la historia del descubrimiento de algunas vitaminas Aspects of the history of the discovery of some vitamins

    OpenAIRE

    Miriam Bolet Astoviza

    2004-01-01

    Hasta hace relativamente poco tiempo, los médicos no tomaban en serio la indicación de la dieta apropiada a cada enfermedad para lograr la mejoría y la curación de los pacientes. Nos propusimos como objetivo actualizar los conocimientos de aspectos de la historia de la nutrición y de los descubrimientos de algunas vitaminas. Se realizó una revisión de la historia de la alimentación y del descubrimiento de algunas vitaminas en el mundo. Se visitó la biblioteca del museo "Carlos Juan Finlay" de...

  12. La prostitución infantil en Brasil. Aspectos jurídicos, conceptuales, modalidades, alcance y causas.

    OpenAIRE

    Francisca Ramón Fernández; Edson Ferreira de Carvalho

    2016-01-01

    En el presente trabajo se exponen los principales aspectos jurídicos, conceptuales, modalidades, alcance y causas relativas a la prostitución infantil en Brasil. El estudio de la legislación muestra la existencia de herramientas para combatir la situación de riesgo de los menores, pero diferentes factores ambientales, sociales y económicos hacen que resulte insuficientes para solucionar el problema. La situación del menor alcanza cotas altamente preocupantes en relación con la explotación sex...

  13. Aspectos preventivos y evaluación de riesgos de un comercio de venta de artículos deportivos

    OpenAIRE

    Rabanedo Fernández, Daniel

    2015-01-01

    El estudio trata de la realización de una evaluación de riesgos y aspectos preventivos en un gran establecimiento del sector comercio. Dadas las múltiples actividades llevadas a cabo así como las múltiples herramientas utilizadas en este tipo de establecimientos se describen las más representativas. El estudio se inicia con la descripción general de la empresa y los puestos de trabajo con sus respectivas tareas. Seguidamente se comenta el sistema de gestión basado en la normativa Oshas 18001:...

  14. Anatomia e aspectos filogeneticos do xilema secundario de 10 especies de Annonaceae do Estado de Santa Catarina

    OpenAIRE

    Botosso, Paulo Cesar

    2013-01-01

    O presente trabalho engloba o estudo anatômico e os aspectos de importância filogenética do xilema secundário de 10 espécies de Annonaceae, com ocorrência natural no Estado de Santa Catarina. Foram estudadas as seguintes espécies: Annona cacans (Warm.) var. glabriuscula R. E. Fries, Annona glabra L., Duguetia lanceolata St. Hil., Guatteria australis St. Hil., Porcelia macrocarpa (Warm.) R. E. Fries, Rollinia emarginata Schlecht., Rollinia exalbida (Vell.) Mart., Rollinia sericea R. E. Fries, ...

  15. La desesperanza de riesgo en jóvenes mexicanos y aspectos sociodemográficos asociados: diferencias por sexo

    OpenAIRE

    Córdova Osnaya, Martha; Universidad Nacional Autónoma de México; Rosales Pérez, José Carlos; Universidad Nacional Autónoma de México

    2013-01-01

    La desesperanza ha sido considerada como un predictor sensible del comportamiento suicida. Los propósitos de la presente investigación fueron los de conocer la confiabilidad de la Escala de Desesperanza de Beck en estudiantes mexicanos de educación media superior, identificar la prevalencia de desesperanza de riesgo, enunciar la asociación de la desesperanza de riesgo con aspectos sociodemográficos y determinar semejanzas y diferencias entre sexos. La muestra estuvo compuesta por 971 estudian...

  16. Fatiga en esclerosis múltiple aspectos clínicos, biológicos y radiológicos /

    OpenAIRE

    Téllez Lara, Nieves

    2008-01-01

    La esclerosis múltiple (EM) es una enfermedad inmunomediada del sistema nervioso central. Más del 50% de pacientes presenta fatiga relacionada con la EM, y este síntoma puede llegar a ser el más discapacitante. En los últimos años se ha publicado una enorme cantidad de trabajos que intenta aclarar datos sobre la etiología y el tratamiento de la fatiga en EM, pero las conclusiones nos ayudan poco en el día a día. La presente tesis recoge cuatro trabajos destinados a conocer mejor aspectos rela...

  17. Aspectos emocionales y calidad de vida en pacientes con enfermedades desmielinizantes: el caso de la esclerosis múltiple

    OpenAIRE

    Arbinaga Ibarzábal, Félix

    2003-01-01

    El trabajo pretende conocer las características de un grupo de 17 enfermos con Esclerosis Múltiple en aspectos como depresión, ansiedad, sensibilidad a la ansiedad y la calidad de vida relacionada con la salud. Mediante la utilización del Inventario de Depresión de Beck (BDI) se observa que el 58,8% presenta algún nivel de depresión; mostrando puntuaciones superiores a las de la población normativa (p

  18. ASPECTOS INGENIERILES DEL CULTIVO IN VITRO DE CÉLULAS VEGETALES PARA LA PRODUCCIÓN DE METABOLITOS SECUNDARIOS

    Directory of Open Access Journals (Sweden)

    MARIO ARIAS

    2009-01-01

    Full Text Available Las plantas son una fuente importante de metabolitos que han sido usados como medicamentos, pesticidas, saborizantes y fragancias. Con el fin de producir estos compuestos sin necesidad de cultivar la planta completa, se ha propuesto la tecnología de cultivo de sus células in vitro (callos, suspensiones y órganos. En este trabajo se abordan diferentes aspectos ingenieriles del cultivo de células vegetales concernientes a la producción de metabolitos secundarios.

  19. Aspectos psicosociales y epidemiológicos vinculados a la conducta suicida en pacientes de edad pediátrica

    OpenAIRE

    Aroldo Hoyos Fernández; Lisbet Suarez Santana; Asney Díaz Sánchez

    2014-01-01

    La atención integral al niño y adolescente es una prioridad de estado cubano y en aras de contribuir a este propósito se ha desarrollado esta investigación en el Hospital “Aleida Fernández Chardiet” del municipio Guines, provincia Mayabeque, desde enero hasta diciembre del 2012, con el objetivo de identificar aspectos psicosociales y epidemiológicos, vinculados a la conducta suicida en los pacientes pediátricos. Se realizó un estudio descriptivo retrospectivo, se analizaron los 76 pacientes c...

  20. Aspectos disautonômicos da porfiria aguda intermitente: a propósito de seis casos

    Directory of Open Access Journals (Sweden)

    Charles P. Tilbery

    1979-06-01

    Full Text Available Foram estudados seis casos de porfiria aguda intermitente, sendo enfocados os aspectos disautonômicos apresentados durante a longa permanência hospitalar dos doentes (média de 64 dias. Foram observados taquicardia sinusal e hipertensão arterial (4 casos, parada cardíaca (3 casos e depressão respiratória (5 casos. Os autores tecem comentários a propósito da fisiopatologia destas alterações e chamam a atenção sobre o prognóstico sombrio da porfiria aguda intermitente.

  1. Depressão na infância e adolecência: aspectos sociais

    Directory of Open Access Journals (Sweden)

    Lúcia Helena Siqueira Barbosa

    1987-09-01

    Full Text Available Este trabalho contém três partes. Uma primeira intitulada Introdução. Uma segunda focalizada sob o título de Material Clínico :apresentação, comentários e considerações sobre a prática do Serviço Social e, uma terceira, Considerações Finais. A primeira tenta discutir dois pontos: - algumas considerações sobre o conceito de depressão na infância e adolescência: caracterização de quadros clínicos com aspectos depressivos nítidos, mais ou menos "puros" e de "reações depressivas", em que tais aspectos estariam como que disfarçados, camuflados, apresentando, mais freqüentemente, sob a forma de inquietação, rebeldia, preocupações somáticas e hipocondríacas, fugas, condutas anti-sociais e outras. A existência de fatores mais marcantes na infância e adolescência do que na idade adulta - por exemplo a impulsividade - contribuem para essa apresentação especial desses quadros clínicos. A prática médico-psicológica em uma instituição com equipe multiprofissional: reflexão abordando, mais de perto, alguns de seus problemas, encarando-se, esses últimos, como sendo de ordem não apenas médico-psicológica, mas, também e sobretudo, algumas vezes, de ordem social Utilizamos, para essa reflexão, o tema da depressão na infância e adolescência, tendo em mente a Medicina e, com ela, a Psiquiatria, como ciência social e, ainda, as tentativas de reapropriação da dimensão social na dinâmica pessoal, advindas das críticas sócio-políticas da psiquiatria. As duas últimas partes focalizam o material clínico, retirado da experiência com crianças e adolescentes no Centro de Saúde Escola Butantã, onde concebemos o grupo familiar envolvido, mas não confundido com "o determinante social" ou com "todos" os determinantes sociais, tentando compreender problemas que são de alienação psicológica, como momento da alienação social Procuramos pensar o "doente mental", não como depositário passivo de algo

  2. Electric characterization of (Sr, Sr-Ba, Ba) M-type ferrites by AC measurements[Alternating Current

    Energy Technology Data Exchange (ETDEWEB)

    Huanosta-Tera, A.; Lira-Hueso, R. de; Perez-Orta, O.; Palomares-Sanchez, S.A.; Ponce-Castaneda, S.; Mirabal-Garcia, M.

    2000-02-01

    Considering the electrical conductivity in ceramics, necessary reference should be given to dynamic processes occurring as a function of frequency and temperature. Although the most immediate interest in ferrites lies in their magnetic properties, technological applications require a wider knowledge of general physical properties as well. This is especially applicable when the materials are studied as a function of composition or when adding different modifiers. In this report, the authors present results of the ac and dc electric characteristics of a family of magneto-plumbite-type hexaferrites, where Ba gradually substitutes Sr in the Ba{sub x}Sr{sub 1{minus}x}Fe{sub 12}O{sub 19} compound (0 {le} x {le} 1). The results were determined over a wide range of frequencies and temperatures.

  3. Peixes recifais da costa da Paraíba, Brasil Reef fishes from Paraíba, Brazil

    Directory of Open Access Journals (Sweden)

    Luiz A. Rocha

    1998-01-01

    Full Text Available The coral reef is an ecossystem which evokes great interest, for its beaury, species diversity and fisheries potential. The coast of Paraíba State, northeast Brazil, possesses several natural reefs and shipwrecks which are inhabited by a rich fish fauna. In order to survey the reef fish fauna of Paraíba State, a total of 118 dives, utilizing SCUBA diving techniques, were carriedoutin 27samplingpoints (depths: 0,5-66m, from February/1995 to May/1996. Specimens were collected whenever underwater identification was precluded. A total of 157 known species belonging to 59 families were found. Four unidentified species, one dasyatid, one haemulid, one scarid, and one labrid were recorded. Haemulidae was the most representative family in number of individuais, whereas Carangidae was the most speciose family. This paper is part of a broader study of the northeast Brazilian reef fishes.

  4. Syntheses, structures, and optical properties of Ba4MInSe6 (M=Cu, Ag)

    International Nuclear Information System (INIS)

    Two new quaternary chalcogenides, namely Ba4MInSe6 (M=Cu, Ag), were synthesized by solid state reactions. These two isostructural compounds adopt the Ba2MnS3 structure type in the orthorhombic space group Pnma. In the structure, the M and In atoms randomly occupy one crystallographic unique metal position with the molar ratio of 1:1 The (M/In)Se4 tetrahedra are connected to each other by corner-sharing to form one-dimensional chains along the b direction, which are separated by mono-capped trigonal prismatically coordinated Ba atoms. Based on the diffuse reflectance spectrum, the optical band gaps were determined to be 2.23(2) and 2.41(2) eV for Ba4CuInSe6 and Ba4AgInSe6, respectively. - Graphical abstract: In the structure of Ba4MInSe6 (M=Cu, Ag), the (M/In)Se4 tetrahedra are connected by corner-sharing to form chains along the b direction, which are separated by Ba atoms. Highlights: ► Two new quaternary chalcogenides, Ba4MInSe6 (M=Cu, Ag), were synthesized. ► Ba4MInSe6 (M=Cu, Ag) are isostructural and crystallize in the Ba2MnS3 structure type ► The (M/In)Se4 tetrahedra are connected by corner-sharing to form chains along the b direction. ► The chains are separated by mono-capped trigonal prismatically coordinated Ba atoms. ► The optical band gaps are 2.23(2) and 2.41(2) eV for Ba4CuInSe6 and Ba4AgInSe6, respectively.

  5. Magnetization and heat capacity studies of double perovskite compounds Ba2SmRuO6 and Ba2DyRuO6

    International Nuclear Information System (INIS)

    Here we report the magnetic and heat capacity studies of the double perovskite compounds Ba2SmRuO6 and Ba2DyRuO6. Antiferromagnetic transitions are inferred at 54 and 47 K in Ba2SmRuO6 and Ba2DyRuO6, respectively, in the magnetization measurements. Heat capacity measurements show large jumps at the corresponding temperatures and confirm the bulk magnetic ordering. Both the measurements provide clear indication of the ordering of the rare earth moments also along with the Ruthenium moments. However, the heat capacity results suggest that the ordering of rare earth magnetic moments is spread over a large temperature range. An anomaly observed in the magnetization measurements at 42 K (below the magnetic ordering) in Ba2SmRuO6 is discerned as a reorientation of Sm3+ moments.

  6. New oxocompounds with planar coordinated Pd2+ BaPdNd2O5 and BaPdSm2O5

    International Nuclear Information System (INIS)

    Single crystals of BaPdNd2O5(A), BaPdSm2O5(B) and BaCuNd2O5(C) were prepared by solid state reaction using BaCl2 as a fusing assistant (A, B) or by high temperature Laser technique (C). X-ray investigations show tetragonal symmetry with A: a=6.7387(5), c=5.9002(25)A, B: a=6.6667(13), c=5.8800(6)A (space group D4sub(4h) - P4/mbm, Z=2). The formerly investigated compound (C) is refined here by single crystal data. (A) and (B) belong to the BaPtNd2O5-type. The results are discussed. (Author)

  7. Early signals of environmental and health impacts caused by uranium mining in Caetite, Bahia, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Brito, Adelson S. de; Rego, Rita de Cassia Franco [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Medicina Preventiva. Programa de Pos-Graduacao em Saude, Ambiente e Trabalho; Zucchi, Maria do Rosario [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Fisica da Terra. Lab. de Fisica Nuclear Aplicada; Navarro, Marcus V. Teixeira, E-mail: mvtn@ifba.edu.b [Instituto Federal da Bahia (LAFIR/NTS/IFBA) Salvador, BA (Brazil). Nucleo de Tecnologia em Saude. Lab. de Fisica Radiologica

    2011-07-01

    Uranium mining and processing at Lagoa Real (Bahia, Brazil) in the southwest of Bahia state started in the year 2000.The processing of uranium ore for obtaining U3O8 (yellowcake) is done today in the processing unit of the Brazilian Nuclear Industries INB located in the area of the same municipality above mentioned. The production capacity is 400 tons / year of U3O8, and the reserves in this region are estimated at 100.000 tons of uranium without any other associated minerals, enough to supply the demand for nuclear power plants Angra I and II for over 100 years. Since the granting of AOP (Permanent Operation Authorization) by CNEN (National Commission on Nuclear Energy) in the year 2009, there were some incidents at the facility, such as: solvents and liquid containing uranium overflow; pipes rupture, causing indiscriminate dispersion of toxic acids and other chemical agents; collapse of parts of the slope of the open pit. CNEN admitted in an official press release on April 1, 2011 that 'INB has no capacity to produce annual reports on environmental monitoring (unable to perform radiometric measurements, etc.). The last time a report was released happened in the year 2008. These reports are vital to the environmental impact assessment of the facility'. Another potential source of environmental and health negative impacts on the local population could be linked to radon emission. What are the levels of this important pollutant in the affected areas? (author)

  8. Antiperovskite Chalco-Halides Ba3(FeS4)Cl, Ba3(FeS4)Br, and Ba3(FeSe4)Br with Spin Super-Super Exchange

    OpenAIRE

    Xian Zhang; Kai Liu; Jian-Qiao He; Hui Wu; Qing-Zhen Huang; Jian-Hua Lin; Zhong-Yi Lu; Fu-Qiang Huang

    2015-01-01

    Perovskite-related materials have received increasing attention for their broad applications in photovoltaic solar cells and information technology due to their unique electrical and magnetic properties. Here we report three new antiperovskite chalco-halides: Ba3(FeS4)Cl, Ba3(FeS4)Br, and Ba3(FeSe4)Br. All of them were found to be good solar light absorbers. Remarkably, although the shortest Fe-Fe distance exceeds 6 Å, an unexpected anti-ferromagnetic phase transition near 100 K was observed ...

  9. Aspectos ultra-sonográficos da trombose da veia porta Ultrasonographic features of portal vein thrombosis

    Directory of Open Access Journals (Sweden)

    Márcio Martins Machado

    2006-04-01

    Full Text Available A trombose da veia porta pode estar associada a várias alterações, como a presença de tumores (por exemplo: hepatocarcinoma, doença metastática hepática e carcinoma do pâncreas, pancreatite, hepatite, septicemia, trauma, esplenectomia, derivações porto-cava, estados de hipercoagulabilidade (por exemplo: gravidez, em neonatos (por exemplo: onfalite e cateterização da veia umbilical e desidratação aguda. Os autores discutem, neste artigo, os aspectos ultra-sonográficos da trombose de veia porta e alguns aspectos de relevância clínica.Portal vein thrombosis may be associated with many alterations, such as the presence of tumors (for example, hepatocellular carcinoma, metastatic liver disease and carcinoma of the pancreas as well as pancreatitis, hepatitis, septicemia, trauma, splenectomy, portacaval shunts, hypercoagulable conditions (for example, pregnancy, in neonates (for example, omphalitis and umbilical vein catheterization and in acute dehydration. The authors discuss herein the sonographic features of portal vein thrombosis as well as some aspects of clinical relevance.

  10. Evidências neuropsicológicas da existiência de um nódulo de aspecto

    Directory of Open Access Journals (Sweden)

    Celso Novaes

    2012-11-01

    Full Text Available Assumindo que todas as línguas naturais compartilham das mesmascategorias funcionais, mostrando assim um alto grau de uniformidade,este trabalho apresenta algumas evidências neuropsicológicas quedizem respeito à dissociação entre a expressão lingüística de tempoe a expressão lingüística de aspecto, em indivíduos com patologiada linguagem – afasia de Broca. Essas evidências nos permitemdefender a hipótese de que a camada flexional seria formada de pelomenos duas subcamadas, sendo uma dessas a camada que projetaindependentemente os traços de aspecto. Essa hipótese vem aoencontro da proposta de Pollock (1989 de que a camada flexionalseria constituída de dois nódulos e da proposta de Chomsky (1995de que somente os traços semanticamente interpretáveis nas interfaceslingüísticas projetariam uma categoria funcional.

  11. Effect of temperature and time on solvothermal synthesis of tetragonal BaTiO3

    Indian Academy of Sciences (India)

    Amir Habib; Nils Stelzer; Paul Angerer; Roland Haubner

    2011-02-01

    Tetragonal BaTiO3 nanoparticles are synthesized via solvothermal route in an ethanol water mixture. Ba(OH)2.8H2O is used as Ba precursor and TiO2 (P25 Degussa ∼25 nm, 30% anatase, 70% rutile) is used as Ti precursor in the Ba : Ti molar ratio 2 : 1. Effect of temperature and time study on solvothermal synthesis of BaTiO3 revealed that a moderate reaction temperature i.e. 185°C and longer reaction time favour tetragonal phase stabilization. Dissolution–precipitation appears to be the transformation mechanism for the crystallization of BaTiO3 from particulate TiO2 precursor.

  12. BaTiO3 supercages: unusual oriented nanoparticle aggregation and continuous ordering transition in morphology.

    Science.gov (United States)

    Li, Juan; Hietala, Sami; Tian, Xuelin

    2015-01-27

    Here we report the organic-free mesocrystalline superstructured cages of BaTiO3, i.e., the BaTiO3 supercages, which are synthesized by a one-step templateless and additive-free route using molten hydrated salt as the reaction medium. An unusual three-dimensional oriented aggregation of primary BaTiO3 nanoparticles in the medium of high ionic strength, which normally favors random aggregation, is identified to take place at the early stage of the synthesis. The spherical BaTiO3 aggregates further experience a remarkable continuous ordering transition in morphology, consisting of nanoparticle faceting and nanosheet formation steps. This ordering transition in conjunction with Ostwald ripening-induced solid evacuation leads to the formation of unique supercage structure of BaTiO3. Benefiting from their structure, the BaTiO3 supercages exhibit improved microwave absorption property. PMID:25514033

  13. Level lifetimes and quadrupole moments from Coulomb excitation in the Ba chain

    Energy Technology Data Exchange (ETDEWEB)

    Bauer, Christopher; Guastalla, Giulia; Leske, Joerg; Moeller, Thomas; Pietralla, Norbert; Stahl, Christian; Stegmann, Robert; Wiederhold, Johannes [Technische Univ. Darmstadt (Germany). Inst. fuer Kernphysik; Seweryniak, Darek; Zhu, Shaofei [Argonne National Lab., Chicago, IL (United States); Collaboration: IS411-Collaboration

    2013-07-01

    The chain of Barium isotopes enables us to study experimentally the evolution of nuclear quadrupole collectivity from the shell closure at N=82 towards neutron-deficient or neutron-rich deformed nuclei. The TU Darmstadt group has investigated several nuclei from stable {sup 130,132}Ba up to radioactive {sup 140,142}Ba with the projectile-Coulomb excitation technique including the use of the Doppler-shift attenuation method (DSAM). Lifetimes of quadrupole-collective states of {sup 132}Ba and {sup 140}Ba were obtained for the first time as well as the static electric quadrupole moments Q(2{sup +}{sub 1}) for {sup 130,132}Ba and {sup 140,142}Ba. The results are compared to Monte Carlo shell model and Beyond-Mean-Field calculations.

  14. Stress-induced superconductivity in undoped BaFe2As2 thin films

    International Nuclear Information System (INIS)

    In this work, thin films of Fe-buffered non-superconducting BaFe2As2 (Ba122) are grown epitaxially on spinel single crystalline substrates using pulsed laser deposition. Due to the coherent growth of the Ba122 layer up to a critical thickness, dc, the Ba122 layer undergoes a tetragonal distortion (clarified using x-ray diffraction) causing a superconducting phase. Thin films with a Ba122-thickness of dcc≥30 nm where no bulk superconducting phase can be measured anymore. Films with a thickness larger 80 nm show again bulk non-superconducting Ba122 properties (magnetic transition at ∼140 K can be measured and the structural parameters have bulk properties).

  15. Research on fabricating technique of Ba-Al-S:Eu sputtering target

    Institute of Scientific and Technical Information of China (English)

    DING Zhao; YU Zhinong; ZHANG Dongpu; XUE Wei; WANG Wuyu

    2009-01-01

    Ba-Al-S-Eu sputtering target for blue emitting phosphors was prepared by powder sintering method. XRD patterns showed that the main components of the target were barium tetra aluminum sulfide (BaAl4S7), bariutm sulfide (BaS), and europium sulfide (EuS). In the samples, part of the barium and aluminum are formed into barium aluminum oxide (BaAl2O4) with the impurity element of oxygen. The PL characteristic spectra of the target showed the 470 nm blue emission obviously, and the Ba-Al-S thin films also transmitted a purple-blue emission at the position of 440 nm.The results indicated that this method was suitable for the fabrication of the Ba-Al-S:Eu sputtering target.

  16. Water adsorption induced in-plane domain switching on BaTiO3 surface

    International Nuclear Information System (INIS)

    In this study, the influences of the adsorption of water molecules on the changes in the atomic and electric structures of BaTiO3 surface were investigated using ab initio calculation. Water molecules are molecularly and dissociatively adsorbed on the BaTiO3 surface, which makes electrons transfer from water molecules to the BaTiO3 surface. The redistribution of electrons in the BaTiO3 surface layers weakens the Ba-O interactions and strengthens the Ti-O interactions, so that the Ti atom shifts in TiO2 plane, i.e., an in-plane domain switching. The adsorption of water molecules on BaTiO3 surfaces also results in a reduction in the surface rumpling

  17. Aspectos psicosociales en universitarias embarazadas Psychosocial aspects regarding pregnant university students

    Directory of Open Access Journals (Sweden)

    María R Estupiñán-Aponte

    2009-12-01

    Full Text Available Objetivo Determinar los aspectos psicosociales relacionados con el embarazo en estudiantes universitarias. Metodología A partir de la revisión de archivos y el muestreo intencional, se seleccionaron 68 estudiantes que tuvieron un embarazo adolescente. Mediante relatos de vida y entrevistas en profundidad se analizan las implicaciones del embarazo en la condición personal, familiar y académica. Resultados Durante el primer trimestre de embarazo, se generan crisis y ajustes en la estructura familiar y afectiva que culminan en la aceptación de la maternidad como proyecto de vida reproduciendo el estereotipo de madresolterismo. El acompañamiento de la pareja se da durante los primeros meses, seguido por abandono. Aunque prejuiciado, el apoyo de la comunidad universitaria incide en el interés por el desarrollo personal, académico y del bebé. Los servicios ofertados por la universidad, son poco utilizados aunque reconocen su importancia. Se consultan referentes especializados que asustan por su énfasis patológico, lo que conduce a informarse con fuentes familiares. La madre de la gestante es quién apoya permanentemente a su hija; no así el padre con quien, se presentan conflictos permanentes. Discusión Formar estudiantes integrales requiere programas que preparen responsablemente para la maternidad y paternidad. La prevención se traduce como promoción de vínculos afectivos saludables y el fortalecimiento en la comunicación familiar y social.Objective Determining the subjective construction of psychosocial factors affecting pregnancy in adolescents in a sample of students. Methodology 68 students who had become pregnant during their adolescence were selected after reviewing their files and sampling by logical criteria. The implications of pregnancy on personal, family and academic conditions were analysed by means of life stories and in-depth interviews. Results Crises and adjustments appeared in family and affective structure during

  18. Indiscernibilidade e identidade em química: aspectos filosóficos e formais

    Directory of Open Access Journals (Sweden)

    Jaison Schinaider

    2014-06-01

    Full Text Available Neste artigo tratamos, de um ponto de vista formal e filosófico, com alguns conceitos que fazem parte da química usual. As teorias da química, e seus conceitos, normalmente são apresentadas de um ponto de vista informal (não axiomatizada, e isso pode trazer dificuldades filosóficas (embora a química propriamente - bem como também as outras disciplinas da ciência aplicada - pareçam não sofrer qualquer restrição quanto a isso. Aqui estaremos ocupados em um aspecto parti-cu-lar, que diz respeito à indiscernibilidade de alguns objetos básicos da química, tais como átomos, moléculas, bem como de seus componentes. Começamos com uma visão geral da identidade destes compostos e seus componentes a partir de uma perspectiva filosófica e, em seguida, mostramos em que sentido o conceito de identidade dos compostos químicos é problemático em relação ao conceito correspondente de identidade na lógica e matemática clássicas (que, como em geral é suposto, estão 'alicerçando' as teorias químicas. Argumentamos que, por um lado, a química parece supor que esses objetos básicos precisam ser 'idênticos' (indistinguíveis uns aos outros (como enfatizado há muito tempo por John Dalton, como veremos. Por outro lado, do ponto de vista formal, se a lógica subjacente à teoria atômica for a lógica clássica (que também é pano de fundo da matemática padrão, coisas idênticas devem ser a mesma coisa e logo 'colapsar' em apenas uma (e este não é o caso em química, uma vez que temos uma enorme quantidade de átomos e moléculas semelhantes, mas não apenas um. Esta aparente contradição pode ser tratada de várias perspectivas e, aqui, propomos o uso de uma teoria de conjuntos não-clássica (a saber, a teoria de quase-conjuntos para alicerçar uma formulação axiomática de certas teoria químicas, mostrando como essa diferente base matemática pode nos levar a uma visão que está mais perto da química em si. Como esta

  19. Aspectos motivacionais da profissão docente universitária

    Directory of Open Access Journals (Sweden)

    Denise Dalpiaz Antunes

    2009-10-01

    Full Text Available A motivação humana configura-se em processos motivacionais e são muitos os elementos em sua especificidade e particularidades, pois, perpassam a caminhada docente, entre auto-formação e formação acadêmica, iniciando-se com desejos próprios do professor. Já na práxis educativa é necessário compreender como a motivação é entendida pelo docente, na perspectiva de ajudar a desencadear os motivos intrínsecos de cada aluno. Este artigo é parte de uma pesquisa desenvolvida pelo Grupo de Pesquisa Processos Motivacionais em Contextos Educativos (PROMOT da PUCRS. Especificamente, a intenção desse estudo é saber como os professores no Ensino Superior concebem a motivação e como ela interfere na prática pedagógica. É um estudo de caso qualitativo, com análise das falas de sete professores universitários e posterior descrição e exploração dos aspectos motivacionais com suas atuações no Ensino Superior numa Universidade Privada do RS. A partir da análise de conteúdo (Bardin, 2004, apresentam-se as categorias, a priori, Concepção de Motivação: revelaram-se diferentes entendimentos acerca da motivação. A posteriori, Trajetória Acadêmica: é um caminho longo que exige muito empenho e dedicação dos que fazem parte do mundo univeristário; História de vida e Autorealização: as vivências desde a infância embasam a formação profissional e servem de modelo para a construção das metas; Formação Pessoal e de Futuras Gerações: evidenciou-se a preocupação de tornarem-se pessoas melhores para a educação das futuras gerações. Human motivation is configured as motivational processes, affected by various factors that interfere with their specificity and peculiarities. These motivational processes permeate teacher’s own path, such as self-training and academic training, which begins with intentions and desires of each teacher, long before completing his/her undergrad courses and professional experiences

  20. République de Djibouti : paysage de l'Ardoukôba

    OpenAIRE

    Pouyllau, Stéphane

    2009-01-01

    Paysage volcanique autour de l'Ardoukôba : vue générale vers l'Est depuis le sommet de l'un des trois cônes du volcan rouge Ardoukôba. Le volcan Ardoukôba est un volcan rouge actif de la région de Tadjourah. Il est né en 1978 et n'a connu qu'une éruption (du 7 au 14 nov. 1978).

  1. Ba{sub 2}TeO: A new layered oxytelluride

    Energy Technology Data Exchange (ETDEWEB)

    Besara, T. [National High Magnetic Field Laboratory, Condensed Matter Sciences Department, 1800 E. Paul Dirac Dr., Tallahassee, FL 32310 (United States); Ramirez, D. [National High Magnetic Field Laboratory, Condensed Matter Sciences Department, 1800 E. Paul Dirac Dr., Tallahassee, FL 32310 (United States); Florida Agricultural and Mechanical University—Florida State University College of Engineering, Department of Chemical and Biomedical Engineering, 2525 Pottsdamer St., Tallahassee, FL 32310 (United States); Sun, J. [National High Magnetic Field Laboratory, Condensed Matter Sciences Department, 1800 E. Paul Dirac Dr., Tallahassee, FL 32310 (United States); Florida Agricultural and Mechanical University—Florida State University College of Engineering, Department of Chemical and Biomedical Engineering, 2525 Pottsdamer St., Tallahassee, FL 32310 (United States); Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN 37831 (United States); Whalen, J.B. [National High Magnetic Field Laboratory, Condensed Matter Sciences Department, 1800 E. Paul Dirac Dr., Tallahassee, FL 32310 (United States); Specialized Crystal Processing, Inc., 400 Capital Circle SE, Suite 18227, Tallahassee, FL 32301 (United States); Tokumoto, T.D.; McGill, S.A. [National High Magnetic Field Laboratory, Condensed Matter Sciences Department, 1800 E. Paul Dirac Dr., Tallahassee, FL 32310 (United States); Singh, D.J. [Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN 37831 (United States); Siegrist, T. [National High Magnetic Field Laboratory, Condensed Matter Sciences Department, 1800 E. Paul Dirac Dr., Tallahassee, FL 32310 (United States); Florida Agricultural and Mechanical University—Florida State University College of Engineering, Department of Chemical and Biomedical Engineering, 2525 Pottsdamer St., Tallahassee, FL 32310 (United States)

    2015-02-15

    Single crystals of the new semiconducting oxytelluride phase, Ba{sub 2}TeO, were synthesized from barium oxide powder and elemental tellurium in a molten barium metal flux. Ba{sub 2}TeO crystallizes in tetragonal symmetry with space group P4/nmm (#129), a=5.0337(1) Å, c=9.9437(4) Å, Z=2. The crystals were characterized by single crystal x-ray diffraction, heat capacity and optical measurements. The optical measurements along with electronic band structure calculations indicate semiconductor behavior with a band gap of 2.93 eV. Resistivity measurements show that Ba{sub 2}TeO is highly insulating. - Graphical abstract: Starting from a simple stacking of rocksalt layers, the final structure of Ba{sub 2}TeO can be obtained by accommodation of structural strain via atom displacements. Density of states calculations and optical absorbance measurements show that Ba{sub 2}TeO has a band gap of 2.93 eV, indicative of semiconductor behavior. - Highlights: • Single crystal synthesis of a new layered oxytelluride, Ba{sub 2}TeO. • The structure features inverse PbO-type BaO layers and NaCl-type BaTe layers. • Optical absorbance show Ba{sub 2}TeO to be a semiconductor with a 2.93 eV gap. • Density of states indicate a small hybridization between Te 5p and Ba 5d states. • The BaTe (BaO) layers dominate the heat capacity at low (high) temperatures.

  2. Quo Vadis the B.A. degree: Perceptions and visions1

    Directory of Open Access Journals (Sweden)

    Annette L. Combrink

    1993-03-01

    Full Text Available Today is a very special day for all the graduates assembled to have a B.A. degree conferred on them. It is a day on which to celebrate the reward for hard work and for realized dreams. This is a very homogeneous group of people - in the sense that they will be receiving B.A. degrees, and for that reason it would be highly apposite to share some cherished thought and ideas about the B.A. degree.

  3. Microstructural properties of BaTiO3 ceramics and thin films

    International Nuclear Information System (INIS)

    A microstructural study of BaTiO3 ceramics obtained by the conventional ceramic method is presented. Targets were produced to grow BaTiO3 thin films by pulsed laser deposition on Pt/Ti/Si (100) substrates. X-ray diffraction, Auger Electron Spectroscopy, X-ray Photon Spectroscopy and Scanning Electron Microscopy were used to study the properties of the BaTiO3 ceramic samples and thin films, as deposited and after an annealing process. (Author)

  4. Studies of multiphoton ionization schemes for RIMS of La and Ba

    International Nuclear Information System (INIS)

    Multiphoton ionization (MPI) with tunable dye lasers has the potential to selectively ionize La in the presence of Ba and attain very high sensitivity. The objective of the work was to study MPI processes of Ba and La and select suitable schemes for selective ionization of La in the presence of Ba. The spectral region 520 to 610 nm was chosen because of reported strong radiative transitions in this region, and its applicability to high repetition rate Cu vapour lasers. (author)

  5. Simulation of Cosmic Microwave Background Polarization Fields for AMiBA Experiment

    OpenAIRE

    Park, Chan-Gyung; Park, Changbom

    2002-01-01

    We have made a topological study of cosmic microwave background (CMB) polarization maps by simulating the AMiBA experiment results. A $\\Lambda$CDM CMB sky is adopted to make mock interferometric observations designed for the AMiBA experiment. CMB polarization fields are reconstructed from the AMiBA mock visibility data using the maximum entropy method. We have also considered effects of Galactic foregrounds on the CMB polarization fields. The genus statistic is calculated from the simulated $...

  6. Study of the 133Ba nucleus with the (vector d,p) reaction

    International Nuclear Information System (INIS)

    Excited states in 133Ba were studied with the 132Ba(vector d,p)133Ba reaction at 24.0 MeV, with a polarized deuteron beam using the Munich magnetic spectrograph Q3D. Many unambiguous spin-parity assignments were made up to an excitation energy of 2.2 MeV, which allow a detailed comparison with different theoretical calculations, such as the interacting boson-fermion model and the shell model. (orig.)

  7. Comparison of Y-Ba-Cu-O compositions prepared from BaCuO2 and Ba2Cu3O5

    International Nuclear Information System (INIS)

    A two step synthesis route has been elaborated for the preparation of YBaxCu1.5xOz superconductor series. It has been shown that the Ba2Cu3O5 double metal oxide, prepared in the first step, is essential in formation of YBa2Cu3O9-d and sharply differs from any other proposed barium cuprate. A wide composition range from x=2 to 17 was prepared from this compound by addition of Y2O3 without disappearance of superconductivity. Resistivity measurements hint at existence of two superconducting phases. ESR investigations revealed on a baseline hysteresis, depending on the actual value of x. (author). 53 refs, 7 figs

  8. Epitaxial thin-film growth of Ruddlesden-Popper-type Ba3Zr2O7 from a BaZrO3 target by pulsed laser deposition

    Science.gov (United States)

    Butt, Shariqa Hassan; Rafique, M. S.; Siraj, K.; Latif, A.; Afzal, Amina; Awan, M. S.; Bashir, Shazia; Iqbal, Nida

    2016-07-01

    Ruddlesden-Popper Ba3Zr2O7 thin films have been synthesized via pulsed laser deposition (PLD) technique. The optimization of deposition parameters in PLD enables the formation of thin film of metastable Ba3Zr2O7 phase from BaZrO3 target. In order to see the post-annealing effects on the structural and optical properties, the deposited Ba3Zr2O7 thin films were annealed at 500, 600 and 800 °C. X-ray diffraction (XRD) reveals the formation of Ba3Zr2O7 phase with tetragonal structure. The changes in the surface of the deposited films were analysed by FE-SEM and AFM. The thin film post-annealed at 500 °C exhibited the best structural, optical and surface properties. Furthermore, the chemical states and chemical composition of the films were determined by X-ray photoelectron spectroscopy (XPS) near the surface. The XPS results show that Ba, Zr and O exist mainly in the form of Ba3Zr2O7 Ruddlesden-Popper-type perovskite structure.

  9. Piezoelectric and Dielectric Properties of Multilayered BaTiO3/(Ba,Ca)TiO3/CaTiO3 Thin Films.

    Science.gov (United States)

    Zhu, Xiao Na; Gao, Ting Ting; Xu, Xing; Liang, Wei Zheng; Lin, Yuan; Chen, Chonglin; Chen, Xiang Ming

    2016-08-31

    Highly oriented multilayered BaTiO3-(Ba,Ca)TiO3-CaTiO3 thin films were fabricated on Nb-doped (001) SrTiO3 (Nb:STO) substrates by pulsed laser deposition. The configurations of multilayered BaTiO3-(Ba,Ca)TiO3-CaTiO3 thin films are designed with the thickness ratio of 1:1:1 and 2:1:1 and total thickness ∼300 nm. Microstructural characterization by X-ray diffraction indicates that the as-deposited thin films are highly c-axis oriented and large in-plane strain is determined in BaTiO3 and CaTiO3 layers. Piezoresponse force microscopy (PFM) studies reveal an intense in-plane polarization component, whereas the out-of-plane shows inferior phase contrast. The optimized combination is found to be the BaTiO3-(Ba0.85Ca0.15)TiO3-CaTiO3 structure with combination ratio 2:1:1, which displays the largest domain switching amplitude under DC electric field, the largest room-temperature dielectric constant ∼646, a small dielectric loss of 0.03, and the largest dielectric tunability of ∼50% at 400 kV/cm. These results suggest that the enhanced dielectric and tunability performance are greatly associated with the large in-plane polarization component and domain switching. PMID:27514235

  10. Er3+ infrared fluorescence affected by spatial distribution synchronicity of Ba2+ and Er3+ in Er3+-doped BaO–SiO2 glasses

    Directory of Open Access Journals (Sweden)

    Atsunobu Masuno

    2016-02-01

    Full Text Available Glasses with the composition xBaO–(99.9 − xSiO2–0.1ErO3/2 (0 ≤x ≤ 34.9 were fabricated by a levitation technique. The glasses in the immiscibility region were opaque due to chemical inhomogeneity, while the other glasses were colorless and transparent. The scanning electron microscope observations and electron probe microanalysis scan profiles revealed that more Er3+ ions were preferentially distributed in the regions where more Ba2+ ions existed in the chemically inhomogeneous glasses. The synchronicity of the spatial distributions of the two ions initially increased with increasing x and then decreased when the Ba2+ concentration exceeded a certain value. The peak shape and lifetime of the fluorescence at 1.55 μm depended on x as well as the spatial distribution of both ions. These results indicate that although ErOn polyhedra are preferentially coordinated with Ba2+ ions and their local structure is affected by the coordination of Ba2+, there is a maximum in the amount of Ba2+ ions that can coordinate ErOn polyhedra since the available space for Ba2+ ions is limited. These findings provide us with efficient ways to design the chemical composition of glasses with superior Er3+ fluorescence properties for optical communication network systems.

  11. Thermal analysis of formation of nano-crystalline BaTiO3 using Ba(NO32 and TiO2

    Directory of Open Access Journals (Sweden)

    Md. Jawed Ansaree

    2015-12-01

    Full Text Available The reaction of Ba(NO32 with TiO2 was studied by thermogravimetric (TG and differential scanning calorimetric (DSC techniques up to 1000 °C and in nitrogen atmosphere. It was found that the formation of BaTiO3 takes place above 600 °C and that precursor mixing time and heating rate have no effect on the reaction temperature. BaTiO3 powder was prepared by calcination of Ba(NO32 and TiO2 precursor mixture at 800 °C for 8 h. X-ray diffraction analysis of the synthesized BaTiO3 confirmed the formation of tetragonal phase with lattice parameters a = 3.9950±0.0003 Å and c = 4.0318±0.0004 Å. Thermal analysis of the synthesized BaTiO3 powder showed weight loss within temperature range 40–1000 °C of only 0.40%. This small amount of weight loss was connected with some impurity phase, and identified as BaCO3 using Fourier transform infrared (FTIR technique.

  12. Neutron diffraction study of the crystal structure of BaMoO{sub 4}: A suitable precursor for metallic BaMoO{sub 3} perovskite

    Energy Technology Data Exchange (ETDEWEB)

    Nassif, V.; Carbonio, R.E. [Univ. Nacional de Cordoba (Argentina). Inst. de Investigaciones en Fisicoquimica; Alonso, J.A. [C.S.I.C., Madrid (Spain). Inst. de Ciencia de Materiales

    1999-08-01

    BaMoO{sub 3}, metallic and Pauli paramagnetic, has been prepared by controlled reduction of BaMoO{sub 4}. This precursor, containing Mo(VI), is unusually stable against reduction, due to structural factors. The crystal structure of BaMoO{sub 4} has been refined from neutron powder diffraction data: space group I4{sub 1}/a (no. 88), Z = 4, a = 5.5479(9), and c = 12.743(2) {angstrom}. A bond-valence study allowed the authors to detect the presence of slight tensile and compressive stresses in the crystal structure of BaMoO{sub 4}, in which Ba is overbonded and Mo is underbonded. However, this effect is less pronounced than in other AMO{sub 4} oxides with a scheelite structure (A = Ca, Sr, Ba; M = Mo, W): BaMoO{sub 4} contains the M cation exhibiting the closest valence to the nominal value of 6+, suggesting a large covalent contribution to the Mo-O bonds. This observation is coherent with the large thermal stability of this compound against reduction, taking place at temperatures above 920 C in H{sub 2} flow.

  13. High coercivity in mechanically alloyed BaFe10Al2O19

    International Nuclear Information System (INIS)

    Al-substituted Ba-ferrite in the form of BaFe10Al2O19 was prepared by mechanical alloying and subsequent heat treatment. Their structure and magnetic properties were investigated in comparison with Ba-ferrite without Al substitution. After annealing at 1100 deg. C, a coercivity as high as 9.3 kOe was measured, while the coercivity values of the Ba-ferrite samples without Al substitution with a similar particle size were observed in the range of 5-6 kOe. A significant reduction of saturation magnetization was observed as compared to pure barium ferrite

  14. Phase relations in BaO-La2O3-V2O5 system

    International Nuclear Information System (INIS)

    The method of singular triangulation was applied to plot a diagram of phase ratios in the subsolidus range of the BaO-La2O3-V2O5 system. New ternary compounds of Ba2LaV3O11 and Ba3La40V12O93 compositions are found. X-ray diffraction characteristic and IR transmission spectra of these compounds are presented. Ba2LaV3O11 compound is melted at 1478±10 K

  15. Highest temperature (120 K) Tl-Ba-Ca-Cu-O superconducting system

    International Nuclear Information System (INIS)

    The highest temperature (120K) Tl-Ba-Cu-O superconducting system comprises a number of superconducting compounds. The Tl-Ba-Ca-Cu-O superconductors are easily made. The structure, electronic and magnetic properties are presented. An unusual levitation phenomenon, in which the Tl-Ba-Ca-Cu-O superconductor can be suspended above, below, or to the side of a magnet, is discussed. A new Tl2O3-vapor process for fabricating the Tl-Ba-Ca-Cu-O superconductors is described

  16. CRP FUMEX PHWR Cases a BaCo Code Point of View and its Results

    International Nuclear Information System (INIS)

    The BaCo code was developed to simulate the nuclear fuel rods behaviour under irradiation. BaCo is focussed in PHWR fuel and has good compatibility with PWR, BWR, WWER, among others type of fuels (commercial, experimental or prototypes). The code includes additional extensions for 3D calculations, statistical analysis, fuel design and a full core analysis. The main BaCo features in the area of PHWR nuclear fuel design, the BaCo code results of the PHWR cases included in the Coordinated Projects of the IAEA and an overview of the main findings of our participation of those code comparison is presented in this paper. (author)

  17. AMiBA: Cluster Sunyaev-Zel'dovich Effect Observations with the Expanded 13-Element Array

    OpenAIRE

    Lin, Kai-Yang; Nishioka, Hiroaki; Wang, Fu-Cheng; Huang, Chih-Wei Locutus; Liao, Yu-Wei; Wu, Jiun-Huei Proty; Koch, Patrick M.; Umetsu, Keiichi; Chen, Ming-Tang; Chan, Shun-Hsiang; Chang, Shu-Hao; Chang, Wen-Hsuan Lucky; Cheng, Tai-An; Duy, Hoang Ngoc; Fu, Szu-Yuan

    2016-01-01

    The Yuan-Tseh Lee Array for Microwave Background Anisotropy (AMiBA) is a co-planar interferometer array operating at a wavelength of 3mm to measure the Sunyaev-Zeldovich effect (SZE) of galaxy clusters. In the first phase of operation -- with a compact 7-element array with 0.6m antennas (AMiBA-7) -- we observed six clusters at angular scales from 5\\arcmin to 23\\arcmin. Here, we describe the expansion of AMiBA to a 13-element array with 1.2m antennas (AMiBA-13), its subsequent commissioning, a...

  18. Gibbs energy of formation of Ba(OH)2 vapor species using the transpiration technique

    International Nuclear Information System (INIS)

    The Gibbs energy of formation of Ba(OH)2 was determined employing the heterogeneous reaction between solid BaO and water vapor and generating gaseous barium hydroxide species according to the reactions BaO(s)+H2O(g)=Ba(OH)2(g). The equilibrium vapor pressure of Ba(OH)2 species under a controlled pressure of water vapor was measured using an automatic recording transpiration apparatus. From the vapor pressure results, the equilibrium constant of the reaction obtained could be represented as ln Kp(±0.04)=-16792.3/T+4.94, Kp=p(Ba(OH)2)/p(H2O) (1346≤T/K≤1451). The Gibbs energy of formation of Ba(OH)2 derived from these data could be expressed as ΔfG deg. (Ba(OH)2,g)(±2 kJ mol-1)=-667.29+0.118 T (1346≤T/K≤1451). From the study, the second-law and third-law values of ΔfH deg. (Ba(OH)2,g, 298.15 K) were worked out to be -(645.1±8.0) kJ mol-1 and -(643.9±2.5) kJ mol-1, respectively

  19. Influencing Factor Investigation on Dynamic Hydrothermal Growth of Gapped Hollow BaTiO3 Nanospheres

    Science.gov (United States)

    Gao, Jiabing; Shi, Haiyue; Yang, Jing; Li, Tao; Zhang, Rui; Chen, Deliang

    2015-08-01

    Gapped hollow BaTiO3 nanospheres with an apparent diameter of 93 ± 19 nm (shell thickness of 10-20 nm) were synthesized via a dynamic hydrothermal process using TiO2 sols and Ba2+ ions as the Ti and Ba sources in alkaline aqueous solutions. The phases and morphologies of the BaTiO3 samples were characterized by X-ray diffraction (XRD), SEM, TEM, and Raman spectra. The effects of the hydrothermal temperatures and durations, NaOH concentrations, and Ba/Ti ratios on the formation of gapped hollow BaTiO3 nanospheres were systematically investigated. The optimum conditions for forming gapped hollow BaTiO3 nanospheres are hydrothermal treatment at 180 °C for 10-20 h under a continuous magnetic stirring with NaOH concentrations of about 1 mol/L and molar Ba/Ti ratios of 1.2-1.5. The formation mechanism of the gapped hollow BaTiO3 nanospheres is understood as the combination of the orientated attachment and reversed crystal growth.

  20. Passage of 95Nb, 140La, 140Ba in silicon

    International Nuclear Information System (INIS)

    Full text: Information on the ranges of fission fragments is important to practical applications. It is necessary also for understanding of interaction mechanism of heavy ions of high energies in solid. At present neither Bohr theory nor LSS theory are completely in accord with published experimental data. Passage of fission fragments of 235U (95Nb, 140La, 140Ba) with energy ∼1 MeV/nucleon in monocrystal silicon was investigated for understanding of interaction mechanism of heavy ions of high energies in solid in this paper. Monocrystals of silicon with crystal orientation of (100) and (111) were pressed to layers of UO2 by contact method and then irradiated with neutrons of reactor spectrum. The integral flow of fission fragments was 1012-1015 f.f.cm-2. The activity of each removal layer and the activity of remanent layer after etching for determine of differential distribution of 95Nb, 140La, 140Ba in Si were measured, γ-spectra of isotopes 95Nb, I40La, 140Ba with energy of γ-quanta of 769, 483, 534.5 keV were chosen accordingly. Anomalous values of these fission fragments' ranges in silicon were received. It is seen that the distribution has several prominent spikes. It was compared to calculation data. Calculation of the fission fragments' ranges in silicon considering a thickness of layer of UO2, integral dose and distribution of fission fragments in 2π-geometry were made. It is shown that the calculated distributions of fission fragments have no extreme values observed in experimental data. The theoretical estimate of position and intensity of spikes of channeling fission fragments, which has correlation with experimental data was executed. The identification of spikes based on their relative intensity was conducted. The range of fission fragments in silicon was calculated by using: ρ=(0.0968)+(0.0497Ma/Za)·E01/2M1/2/Z1/2, where Ma and Za - mass and charge of target accordingly, Z - an effective charge of fragments with mass M. In case of axial