1000 resultados para Salto Grande Reservoir
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Référence bibliographique : Rol, 58022
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Référence bibliographique : Rol, 58024
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Référence bibliographique : Rol, 58025
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Référence bibliographique : Rol, 58027
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O objetivo deste trabalho foi avaliar os impactos ambientais do manejo agroecológico da caatinga, em unidades de produção familiar no Rio Grande do Norte, pelo método Ambitec de produção animal - dimensão ambiental, desenvolvido pela Embrapa Meio Ambiente. Foram avaliadas sete unidades de produção familiar, em quatro projetos de assentamentos de reforma agrária do Município de Apodi, RN. Os dados para o levantamento foram obtidos por meio de questionários aplicados aos representantes das unidades produtivas familiares, que atribuíram, a cada variável estudada, um valor que representou a alteração proporcionada pela implementação da tecnologia. Após a inserção dos coeficientes de alteração de cada variável dos indicadores por unidade de produção, o coeficiente de impacto foi automaticamente calculado por meio da planilha Ambitec. O manejo agroecológico da caatinga resultou num impacto ambiental positivo, e suas maiores contribuições foram relacionadas aos efeitos positivos dos seguintes indicadores: capacidade produtiva do solo, uso de insumos materiais, qualidade do produto e diminuição da emissão de poluentes à atmosfera. Dois indicadores geraram efeitos negativos: o uso de energia e o uso de recursos naturais. Pela superioridade dos benefícios gerados, o manejo agroecológico da caatinga é uma inovação tecnológica geradora de impactos ambientais positivos.
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L'article rend compte des résultats d'une recherche comparative sur les processus de féminisation des professions juridiques en France et en Grande-Bretagne. Les auteurs attirent l'attention sur l'importance du rôle du « levier des diplômes » sur la féminisation plus précoce et plus soutenue de certaines professions juridiques en France par rapport à la Grande-Bretagne. Les auteurs situent ce phénomène de féminisation dans le contexte des transformations structurelles qui touchent ces professions depuis le milieu des années 1970. Prenant appui sur les données portant sur l'évolution des carrières des avocats français et des solicitors britanniques en fonction du sexe et de l'ancienneté, elles attirent l'attention sur la manière dont ces transformations structurelles s'articulent avec le phénomène de féminisation et insistent sur la nécessité d'une analyse approfondie des trajectoires professionnelles sexuées dans ce contexte de grands bouleversements structurels. The paper presents the results of a comparative research project on the feminisation of the legal professions in Britain and France. The authors stress the importance of the role of the « qualifications lever » on the earlier and more extensive character of the feminisation of certain legal professions in France as compared to Britain. An attempt is made to place feminisation in the general context of structural change taking place within the legal profesions since the middle of the 1970's. On the basis of original data on the career structure of French avocats and British solicitors by gender and length of service, the authors stress the manner in which such structural changes interrelate with the process of professional féminisation and insist on the need to adopt in-depth analysis of gendered professional career patterns within this context of profound structural transformation
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Collection : Anciennes descriptions de Paris ; VII
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Collection : Bibliothèque contemporaine
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Initiation of antiretroviral therapy during the earliest stages of HIV-1 infection may limit the seeding of a long-lasting viral reservoir, but long-term effects of early antiretroviral treatment initiation remain unknown. Here, we analyzed immunological and virological characteristics of nine patients who started antiretroviral therapy at primary HIV-1 infection and remained on suppressive treatment for >10 years; patients with similar treatment duration but initiation of suppressive therapy during chronic HIV-1 infection served as controls. We observed that independently of the timing of treatment initiation, HIV-1 DNA in CD4 T cells decayed primarily during the initial 3 to 4 years of treatment. However, in patients who started antiretroviral therapy in early infection, this decay occurred faster and was more pronounced, leading to substantially lower levels of cell-associated HIV-1 DNA after long-term treatment. Despite this smaller size, the viral CD4 T cell reservoir in persons with early treatment initiation consisted more dominantly of the long-lasting central-memory and T memory stem cells. HIV-1-specific T cell responses remained continuously detectable during antiretroviral therapy, independently of the timing of treatment initiation. Together, these data suggest that early HIV-1 treatment initiation, even when continued for >10 years, is unlikely to lead to viral eradication, but the presence of low viral reservoirs and durable HIV-1 T cell responses may make such patients good candidates for future interventional studies aiming at HIV-1 eradication and cure. IMPORTANCE: Antiretroviral therapy can effectively suppress HIV-1 replication to undetectable levels; however, HIV-1 can persist despite treatment, and viral replication rapidly rebounds when treatment is discontinued. This is mainly due to the presence of latently infected CD4 T cells, which are not susceptible to antiretroviral drugs. Starting treatment in the earliest stages of HIV-1 infection can limit the number of these latently infected cells, raising the possibility that these viral reservoirs are naturally eliminated if suppressive antiretroviral treatment is continued for extremely long periods of time. Here, we analyzed nine patients who started on antiretroviral therapy within the earliest weeks of the disease and continued treatment for more than 10 years. Our data show that early treatment accelerated the decay of infected CD4 T cells and led to very low residual levels of detectable HIV-1 after long-term therapy, levels that were otherwise detectable in patients who are able to maintain a spontaneous, drug-free control of HIV-1 replication. Thus, long-term antiretroviral treatment started during early infection cannot eliminate HIV-1, but the reduced reservoirs of HIV-1 infected cells in such patients may increase their chances to respond to clinical interventions aiming at inducing a drug-free remission of HIV-1 infection.