959 resultados para Degradación forestal
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Pós-graduação em Filosofia - FFC
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The changes in the world of work that, in turn, directly affect the teaching work, have expanded the processes of precariousness and intensification, contributing for deteriorating conditions which teachers use to labor. Considering that the time designated for teaching activities is an important part of work conditions, we look for, in this article, to analyze the work shift of teachers in São Paulo state educational public system. Regarding that teachers are a very heterogeneous group, we have chosen to discuss the workday those professionals who dedicate themselves in the last years of elementary and high school. Through a literature review and a research about the legislation related to the topic, in Brazil and São Paulo state, we have highlighted that the teachers’ work shifts should include not only the time for classroom activities, but also for other extra activities. Moreover, we emphasize that the state of São Paulo government has promoted, since 2012, a reformulation of the teachers’ work shift that has not properly include the appropriate length of time for extra educational activities, contrasting the parameters founded in the national legislation. Besides the legal non-compliance, that fact has accentuated the process of intensification of teaching work, contributing for the embrittlement of the collective activities.
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The roots' powder of timbo species collected in different regions of Amazonia that were tested in larvae groupings, didn't produce differential significative effects in two strains of Musca domestica. The two species with the greater number of plants used in the trial were Derris urucu and Derris nicou; the individuals from the species came from regions considered as "forestal refugies" during the Amazonian pleistocene. Among each species the plants varied since that inefficient to control, until plants lethals to the fies. This differential capacity for larvae control among plants of the same species, originated from different regions, suggests that both species had their populations isolated, during the quaternary epoch. In regions or "forestal refugies", where both species were represented, D. urucu was superior to D. nicou in the capacity to control larvae. While among plants from F region (Peruvian-East refuge) of the State of Acre, the two species had convergence in the values of damage to larvae groupings. Among the another species, Derris sp. (yellow timbo or watermelon timbo) didn't show differences in larvae control between samples from the two regions; while the species that was introduced in the Amazonia Denis elleptica showed damage in the larvae groupings similar to the most effective plants of D. nicou and D. urucu.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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The bone repair process is controlled by complex molecular mechanisms that involve systemic and local factors. Fibrin glue is derived from human plasma and mimics the final pathway of coagulation network. Tranexamic acid inhibits fibrinolysis and prevents or decreases the formation of degradation products of fibrin and fibrinogen. The purpose of this study was to evaluate histologically in rats the effect of tranexamic acid associated with the fibrin glue on bone healing. The experiment used 60 (n = 5) male rats in: GI: Control, GII: fibrin glue, GIII tranexamic acid and GIV /fibrin glue/tranexamic acid. Bone defect (2.5mm diameter) was created in right tibia. The animals were euthanized at 7,14 and 30 days postoperatively, and the pieces were processed with hematoxylin and eosin. The results showed at 7 days post-operative surgical cavity filled with dense connective tissue rich in fibroblasts, permeated by delicate neoformed bone trabeculae in percentage of 70-80% for GI, GII and GIII and GIV to 94.8%. At 14 days post-operative newly formed bone was found between 75-85% for GI, GII and GIII and percentage above 95% for GIV. At 30 days postoperative GI and GIV showed 95-100% of mature bone tissue; GII and GIII in percentage close to 80-90%. Based on the results and methodology is concluded that fibrin / tranexamic acid glue association has positive action on bone repair.
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Vitamin C is vulnerable to oxidative degradation and then the aim of this study was conducting a literature review about quality control of vitamin C in finished products. The conclusion is determined multiple emulsions and products which contain encapsulant materials are able to protect it from oxidation ensuring its efficacy.
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This article discusses the need to deepen Psychology criticism as a science, unveiling its ideological commitment to the demands posed by the capitalism development and, at the same time, develop the critical thinking in Psychology. Taking the dialectical historical materialism as a basis, the main elements which should be contemplated by the critical thinking are presented: the dialectical reflection; the knowledge criticism; the denounce of degradation, alienation and human heteronomy in the conditions posed by capitalism and the possibility of being used as an instrument in the social transformation process. The incorporation of these elements can guide the constitution process of psychological knowledge which will be able to provide more satisfactory answers to questions concerning the dialectical relationship between individuals and society and the possibilities of human emancipation in nowadays society.
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The increasing expansion of agricultural activities, without considering the potential and limitations of soils is a potential source of environmental degradation. Thus, the present study assessed the variation of use and occupation in 49 years, between 1962 and 2011 scenarios of watershed of São Caetano - Botucatu (SP). geoprocessing techniques were used in this study. In a Geographic Information System (GIS) - IDRISI – it was integrated information from IBGE digital cards, scale 1:50,000, plus aerial photographs (1962) and satellite images LANDSAT - 5 (2011). In the study area, we can view the progress of the urban area, which in 1962 was not present in the watershed. In 2011, the urban area occupied 21.37% of the total area. Even with this breakthrough occurring in the period of 49 years, there was an increase in the area of natural vegetation, which once occupied only 12.33% of the area (1962), and in 2011 represents 25% of the total area of the watershed, showing an increase in awareness on the importance of preserving nature. Thus, we can conclude that the analysis tools based on GIS enabled us to analyze variations in space and time and to propose alternatives to the correct use and occupation of land.
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This study aims to perform the morphometric characterization of the watershed stream Petiço, Botucatu-SP, through techniques of GIS by GIS IDRISI Selva and Charter planialtimetric Botucatu (SF-22-ZB-VI-3) , edited by IBGE (1969), scale 1: 50000 for ranking the drainage network and the morphometric analysis. The variables analyzed were the dimensions, the relief pattern, pattern of the drainage network and the shape variables. The results show that related to how the watershed has an oblong shape with environmental interpretation with low tendency to flooding and erosion. The sinuosity index of 1.22 shows that the channels of the micro tend to be somewhat sinuous, which allows to infer that is permeable soil with good water infiltration. Based on the results of the morphometric variables was found that the watershed is in good condition of conservation, however, presents certain risks of susceptibility to erosion, and environmental degradation in some points, being fundamental to the maintenance of vegetation cover, in view of the roughness coefficient (Rn). Thus, the evaluation of morphometric characteristics in the study watershed constitutes an important tool in conjunction with the use of GIS and Geographic Information Systems makes possible the planning and management of natural resources aimed at their conservation.
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Pós-graduação em Biociências - FCLAS
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The creation of new legally protected areas brings many conflicts that distance the real landscape from the expected according to environmental law or conservation researchers. In this study, we mapped and compared the changes in Serra da Japi (Sao Paulo State, Brazil) throughout 40 years with scenarios of legal protection and scientific expectation on forest conservation, to evaluate the distance between them. This may allow us to infer the direction of historical changes and assist in the debate among decision makers. The results showed that most legal requirements on forest protection in the current landscape have been met. The 1960s was the period when the forest cover was closest to the desirable conservation stage. Although the Serra do Japi has maintained large areas of forests during the entire study period, human interference increased with the expansion of reforestation and urban areas, and access roads were identified as a primary potential driving forces of change. In addition, habitat loss was observed in the landscape, which can represent the first phase of a sequence of modifications detrimental to the environmental conservation of this protected area, including decision changes to land use. In conclusion, the changes evolved toward conservation expectations, but not toward the forest configuration of scientific expectation.
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Os empreendimentos hidrelétricos são alternativas favoráveis economicamente em função do grande potencial hidrelétrico disponível no território brasileiro. Apesar de serem notórias em causar significativa degradação ambiental, conformam historicamente uma importante controvérsia do setor energético brasileiro. Orientado por esta problemática, o presente trabalho tem como objetivo principal analisar o histórico e as tendências do planejamento espacial de usinas hidrelétricas no Brasil, interpretando-os a partir da relação entre o potencial hidrelétrico disponível no espaço e o grau de disciplinamento do uso e ocupação do espaço no tempo. Até a década de 1970, a implantação de hidrelétricas ocorreu, relativamente, à luz de menor grau de disciplinamento de uso e ocupação do espaço, como foi o caso das hidrelétricas de Balbina e Tucuruí, as quais também induziram a primeira grande crise ambiental do setor e favoreceram a criação dos instrumentos de política ambiental, em 1981. As décadas de 1980 e 1990 são caracterizadas por um vazio de planejamento de hidrelétricas, o que é retomado a partir de 2000 em função de um ambiente econômico internacional favorável aos investimentos em infraestrutura, resultando no aumento da exploração do potencial hidrelétrico orientada especialmente para a região Amazônica. Porém, esta reorientação depara-se com um maior grau de disciplinamento do uso do espaço que acaba vinculando novas dimensões para o planejamento espacial de hidrelétricas, especialmente em regiões com alta sensibilidade socioambiental, como é o caso da Amazônica. Ainda assim, esta região é aquela que ainda detêm o maior potencial hidrelétrico a ser explorado, o que faz dela a escolhida como a fronteira hidrelétrica da década de 2010.
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Institut de Ciències del Mar (ICM-CSIC). Doctorado en oceanografía. Con mención de Calidad de la ANECA
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Programa de doctorado: Ingeniería ambiental y desalinización