12 research outputs found

    Ser, permanecer y transcurrir

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    Un tema actual de debate a nivel mundial son los altos niveles de deserción estudiantil que se registran en el ingreso a las universidades. La problemática del abandono es una realidad compleja, y requiere de múltiples estrategias y dispositivos para resolverla. Dentro de este marco, la Universidad Nacional del Comahue se ha propuesto generar y sostener políticas que acompañen a los alumnos en el ingreso y durante el primer año de estudios, a fin de superar los obstáculos académicos y fortalecer sus capacidades personales, intentando de esta manera reducir la deserción

    La renovación de la palabra en el bicentenario de la Argentina : los colores de la mirada lingüística

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    El libro reúne trabajos en los que se exponen resultados de investigaciones presentadas por investigadores de Argentina, Chile, Brasil, España, Italia y Alemania en el XII Congreso de la Sociedad Argentina de Lingüística (SAL), Bicentenario: la renovación de la palabra, realizado en Mendoza, Argentina, entre el 6 y el 9 de abril de 2010. Las temáticas abordadas en los 167 capítulos muestran las grandes líneas de investigación que se desarrollan fundamentalmente en nuestro país, pero también en los otros países mencionados arriba, y señalan además las áreas que recién se inician, con poca tradición en nuestro país y que deberían fomentarse. Los trabajos aquí publicados se enmarcan dentro de las siguientes disciplinas y/o campos de investigación: Fonología, Sintaxis, Semántica y Pragmática, Lingüística Cognitiva, Análisis del Discurso, Psicolingüística, Adquisición de la Lengua, Sociolingüística y Dialectología, Didáctica de la lengua, Lingüística Aplicada, Lingüística Computacional, Historia de la Lengua y la Lingüística, Lenguas Aborígenes, Filosofía del Lenguaje, Lexicología y Terminología

    É a histologia gástrica um marcador útil na decisão de erradicar o Helicobacter pylori nos pacientes com dispepsia?

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    CONTEXT: It still remains an open debate whether Helicobacter pylori eradication is beneficial or not for the improvement of symptoms in functional dyspepsia. Differences in geographic distribution, the worldwide H. pylori genetic variability and the fact that the outcome of infection is strongly related to the virulence of the infecting strain are factors that might be driving ongoing controversies. OBJECTIVE: To study the correlation between gastric histology and H. pylori serology status in patients with dyspepsia. METHODS: This is a cross-sectional study where 40 consecutive dyspeptic patients (28 women and 12 men, mean age 48.5 years) with endoscopically normal stomachs were selected from the endoscopy unit at a university hospital in Recife, PE, Northeast of Brazil, between March 1998 and July 1999. Patients underwent gastric mucosal biopsy and serological tests (anti-Hp and anti-CagA antibodies). Gastric biopsies were examined using H-E and Giemsa stains and gastritis was classified and graded (mild, moderate or severe) according to the updated Sydney System - Houston, 1994. RESULTS: Among 40 patients with dyspepsia the gastric histology revealed that about ¼ had moderate (25%) or severe (2.5%) gastritis. This subgroup of patients also had a greater positive frequency of anti-Hp (100% vs 41%; P = 0.0005) and anti-CagA (91% vs 58%; P = 0.09) antibodies when compared with those with normal histology (27.5%) or mild gastritis (45%). CONCLUSION: Since upper gastrointestinal endoscopy is part of the functional dyspepsia investigation and serology for anti-CagA antibody is not available in daily clinical practice, by biopsying gastric mucosa we would only be able to selectively apply H. pylori eradication therapy for those with histology that best correlate with virulent infecting strains (moderate or severe gastritis) - around ¼ of our study patients with dyspepsia.CONTEXTO: O benefício da terapia de erradicação do H. pylori como parte do tratamento da dispepsia funcional ainda é uma questão em aberto. Diferenças na distribuição geográfica, a ampla variabilidade genética e o fato de que a expressão clínica da infecção está fortemente relacionada com a virulência das cepas infectantes, são fatores que provavelmente guiam as controvérsias. OBJETIVO: Estudar a correlação entre histologia gástrica e sorologia para H. pylori em doentes com dispepsia. MÉTODOS: Estudo descritivo-transversal com 40 pacientes consecutivos com sintomas dispépticos (28 mulheres e 12 homens, média de idade de 48,5 anos) e achado endoscópico de estômago normal, selecionados a partir da sala de endoscopia (Hospital das Clínicas da Universidade Federal de Pernambuco, Recife, PE.) entre março de 1998 e julho de 1999. Todos foram submetidos a biopsias gástricas e testes sorológicos (anti-Hp e anti-CagA). As biopsias foram analisadas pelos métodos de H-E e Giemsa e os achados de gastrite classificados de acordo com o Sistema Sydney atualizado. RESULTADOS: A histologia dos 40 pacientes revelou que cerca de ¼ apresentava gastrite moderada (25%) ou severa (2,5%). Esse grupo também apresentava maior frequência de positividade anti-Hp (100% vs 41%; P = 0,0005) e anti-CagA (91% vs 58%; P = 0,09) quando comparado com os casos com histologia normal (27,5%) ou gastrite leve (45%). CONCLUSÃO: Considerando que a endoscopia digestiva alta é parte da rotina de investigação da dispepsia funcional e que a sorologia anti-CagA não está disponível na prática clínica diária, através da histologia pode-se selecionar e aplicar terapia de erradicação do H. pylori apenas para os casos que muito provavelmente estão associados a cepas patogênicas de H. pylori (doentes com gastrite moderada ou severa) - cerca de ¼ da presente amostra.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Universidade Federal de Pernambuco Division of Gastroenterology Department of Internal MedicineUniversidade Federal de São Paulo (UNIFESP) Division of Gastroenterology Department of Internal MedicineUniversidade Federal de Pernambuco Department of AnatomopathologyUNIFESP, Division of Gastroenterology Department of Internal MedicineSciEL

    Pathogenic Hantaviruses, Northeastern Argentina and Eastern Paraguay

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    We describe the first, to our knowledge, cases of hantavirus pulmonary syndrome in northeastern Argentina and eastern Paraguay. Andes and Juquitiba (JUQ) viruses were characterized. JUQV was also confirmed in 5 Oligoryzomys nigripes reservoir species from Misiones. A novel Akodon-borne genetic hantavirus lineage was detected in 1 rodent from the Biologic Reserve of Limoy

    As pesquisas denominadas "estado da arte" Research called "state of the art"

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    Nos últimos quinze anos, no Brasil e em outros países, tem se produzido um conjunto significativo de pesquisas conhecidas pela denominação "estado da arte" ou "estado do conhecimento". Definidas como de caráter bibliográfico, elas parecem trazer em comum o desafio de mapear e de discutir uma certa produção acadêmica em diferentes campos do conhecimento, tentando responder que aspectos e dimensões vêm sendo destacados e privilegiados em diferentes épocas e lugares, de que formas e em que condições têm sido produzidas certas dissertações de mestrado, teses de doutorado, publicações em periódicos e comunicações em anais de congressos e de seminários. Neste artigo levanto e tento responder as seguintes questões: seria possível fazer um esforço de interrogar a história a produção acadêmica sobre determinada área do conhecimento, optando por ler apenas dados bibliográficos e resumos dos trabalhos? O que significa ler esse lugar (catálogos), instituição de divulgação dos trabalhos, tomando-o como fonte documental para um mapeamento da produção acadêmica, em pesquisas denominadas "estado da arte"?<br>These last fifteen years, Brazil and other countries have seen the production of a significant set of research, known as "state of the art" or "state of knowledge". Defined as having a bibliographic feature, they seem to share the challenge of mapping and discussing a certain academic production in different fields of knowledge. They try to show which aspects and dimensions have been highlighted and privileged at different times and places. They also pinpoint how and in what conditions certain kinds of master's degree thesis and doctor's degree dissertations, publications in periodicals and communications in annals of congress and seminary were produced. In this article, I pose and try to answer the following questions: Is it worth making the effort of interrogating the history of the academic production about a given area of knowledge, choosing to read only bibliographic data and abstracts of works? What does it man to read this institution of work dissemination (catalogues), taking it as a documental source to map the academic production in research called "state of art"

    The loss of species: mangrove extinction risk and geographic areas of global concern

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    Mangrove species are uniquely adapted to tropical and subtropical coasts, and although relatively low in number of species, mangrove forests provide at least US $1.6 billion each year in ecosystem services and support coastal livelihoods worldwide. Globally, mangrove areas are declining rapidly as they are cleared for coastal development and aquaculture and logged for timber and fuel production. Little is known about the effects of mangrove area loss on individual mangrove species and local or regional populations. To address this gap, species-specific information on global distribution, population status, life history traits, and major threats were compiled for each of the 70 known species of mangroves. Each species\u27 probability of extinction was assessed under the Categories and Criteria of the IUCN Red List of Threatened Species. Eleven of the 70 mangrove species (16%) are at elevated threat of extinction. Particular areas of geographical concern include the Atlantic and Pacific coasts of Central America, where as many as 40% of mangroves species present are threatened with extinction. Across the globe, mangrove species found primarily in the high intertidal and upstream estuarine zones, which often have specific freshwater requirements and patchy distributions, are the most threatened because they are often the first cleared for development of aquaculture and agriculture. The loss of mangrove species will have devastating economic and environmental consequences for coastal communities, especially in those areas with low mangrove diversity and high mangrove area or species loss. Several species at high risk of extinction may disappear well before the next decade if existing protective measures are not enforced
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