188 resultados para permanence
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A pesquisa se propõe a compreender a permanência da pequena produção em uma agricultura de caráter capitalista. Os tipos de produtos explorados constituem-se no principal elemento diferenciação das três categorias de pequenos produtores caracterizados neste estudo.
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Pós-graduação em Biometria - IBB
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Medicina Veterinária - FMVZ
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Pós-graduação em Odontologia - FOAR
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Pós-graduação em Agronomia - FEIS
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The infestation of weeds is a major biotic factor in the agroecosystem of cane sugar that may interfere in development and crop productivity. This study aimed to evaluate the potential for leaching and residual effects of the herbicide amicarbazone in contrasting soils. Samples were Quartzarenic Neosol (NR - sandy texture) and Red Latosol (LR - clay texture). For the leaching potential, after application of herbicide amicarbazone (NR 1.05 kg ha(-1) and LR 1.40 kg ha(-1)), layers of 0, 20, 40, 60, 80 and 100 mm of water were applied to soil columns. We evaluated the residual effect after the permanence of the herbicide in soil of clay texture and sandy for periods of 0, 25, 50, 75 and 100 days after application (DAA) of amicarbazone (0, 1.05, 1.40 kg ha(-1)) treatments. The amicarbazone started showing high leaching from the 60 mm layer of water in sandy texture soils, evidencing a shorter residual effect. In clay soil, slides from 20 to 80 mm of water reduced the biomass until a depth of 5-10 cm, with the use of this herbicide. Based on these results, we conclude that the amicarbazone showed higher leaching and lower residual effects in sandy soil. The residual effect of amicarbazone was prolonged as the content of clay and organic matter present in the soil increased.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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This research focuses on the inquiry about the impact of the Studentship Program offered by the Academic Extension Board of the São Paulo State University – UNESP. The project emphasized the importance of this program to all college students. The data was obtained through a questionnaire and indicated that the budget invested by the university is essential to the permanence and performance of the low-income students in all graduation courses offered.
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Aiming to contribute to understanding the Brazilian academic production on literacy, theses and dissertations on the subject, completed between 1965 and 2011, are analyzed. Situating them in the historical process of constitution of literacy as an object of study, since the 19th. century, beyond the political and historical context of origin in the 1960s, the following contexts are focused, especially from the 1980s, when begins the process of expansion in terms of amount of this academic production and geographic diversity as well as areas of expertise of the graduate programs in which they were defended. While these advances confirm the importance of approaches that consider the interdisciplinary and multifaceted character of literacy, there are contradictions that present significant challenges to researchers seeking both understand the permanence of motivations and pragmatic purposes as to proposing new themes, objects, theoretical and methodological aspects for the development of new research that are lacking, as diagnosed needs and desired progress, scientifically and socially.
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This case study objectified investigating the symptomatology prevalence for depression (DP) and cognitive decline (CD) on institutionalized elderly’s; verifying the existence of correlations between DP and CD with age, gender and scholarity; and analyzing the possible correlations between symptomatology for DP and CD. For the realization of this research were selected, in two Elderly’s Long-Permanence Institutions (ELPIs), 24 subjects, which were classified according to gender, scholarity and age group. To verify the occurrence of CD, the Mini Mental State Examination (MMSE) was applied and, for the incidence of DP, the Geriatric Depression Scale (GDS) was applied. The data were tabulated and descriptively analyzed. For the study of the relations between quantitative variables, the Pearson correlation test was utilized and also the Spearmann test when necessary; for the comparison between two independent groups, the Student's t-test was utilized; for the verification of the association between gender, scholarity, DP and CD indicatives, the Pearson's X2 test and, due to theoretical restriction, the Fisher's exact test were utilized. The level of 5% probability was adopted for the rejection of nullity's hypothesis on all the tests. The research demonstrated that 50% of the research' subjects presented DP indicatives and 54.2% presented CD indicatives. Associations between: gender and DP (p = 0.414), gender and CD (p = 0.219), scholarity and CD (p = 0.527) were not observed. Positive regular correlation was verified between age and DP (r = 0.557; p = 0.005) and negative regular correlation was verified between DP and CD (r = -0.406; p = 0.049). The data suggest that DP might be a reaction to CD perceived by the subject. However, the hypothesis that indicates DP as a risk factor for CD and DM cannot be overruled, which suggests the importance of monitoring and treating depressive episodes on elderly populations.
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This article ask itself about the permanence of Marx and Engels’ Communist Manifest, demarking the text in its own time (1848), in the last Engels’ day’s life (1895), at the moment of the explosion of the German socialist revolution (1918) and today. !e conclusion is that this text remains current while it is necessary the theoretical and practice criticize of the capital.
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Crops used to cover the ground may also release nitrogen into the soil during mineralization. However, it is necessary to identify species that combine fast nutrient release and longer permanence of the straw on the soil surface. The aim of this study was to investigate straw degradation and nitrogen release from cover crops under no-tillage cropping systems. The field trial was performed during two growing seasons in summer (2008/2009 and 2009/2010) in the Cerrado region of Brazil. The experimental design was a randomized block in factorial arrangement. Treatments were the combination of five plants (four cover crops species, 1 - Panicum maximum, 2- Brachiaria ruziziensis, 3. Brachiaria brizantha and 4. Pennisetum glaucum [millet], and fallow as a control) with six sampling times (first six weeks after application of glyphosate on the cover crops). Pennisetum glaucum and fallow showed faster straw degradation and nitrogen release. The cover crops Panicum maximum, Brachiaria brizantha and Brachiaria ruziziensis stood out in biomass production and in the amount of nitrogen in their shoots but had the lowest coefficients of degradation and persisted longer on the soil surface than Pennisetum glaucum and fallow.