Analise técnico-econômica de um gaseificador Downdraft e de filtros para limpeza de gás de síntese

The biomass gasification systems have been used for a long time and prove to be a good alternative to the generation of energy problems. This type of management requires a simple installation and maintenance which gives them a high availability. In Biomass project via Call CTEnerg 33/2006-1, funded by the Ministry of Science and Technology - MCT - Brazil, the Group Energy Systems Optimization – GOSE - at FEG - UNESP built and tested two prototypes of gasifiers. These is fed with 25 kg / h of dry wood (chips), and 50 Nm3 / h of air to produce gas at a flow rate of approximately 70 Nm3 / h of wood (syngas) at a temperature approximately 600 ° C. In this work of graduation, studies were conducted on the materials used in both the gasifier as well as cleaning the filter synthesis gases. The system of gas cleaning and conditioning is vital to ensure the life of the Internal Combustion Engine. In this case the studies of different filters for small gasification systems (properties, materials used, characteristics, types, etc.) are very relevant to its use in the prototype of the college campus. Were also performed a technical and economic analysis of a cogeneration system that consists in the combination of the downdraft gasifier studied in this work, an internal combustion engine, two heat exchangers and a SRA (absorption system refrigerator). Were calculated the costs of electricity generation, hot water and cold water. Finally, we analyzed the economic feasibility of the project

Análise comparativa entre sistemas de resfriamento de injeção de plástico

This study aims to prove the economic feasibility of the installation of mechanical compression chillers on plastic injection molding machines in order to reduce the production cycle time of toothbrush cables in a specific case study. This evidence was confirmed by the comparative analysis of the system replaced and the new system installed. The old system had only one closed loop cooling tower which pumped chilled water to the injection molds, and the new system has the same tower sending cold water to the condensers of individual chillers installed on each injection machine. We conducted an analysis of energy efficiency in each system, showing that in terms of thermal efficiency virtually nothing has changed, but in terms of electricity demand the new system consumes 60.3 kW more. We conducted an analysis of machine productivity for both systems, showing a much higher productivity of the new system due to reduced cycle times caused by the presence of chillers and their greater cooling capacities. Equipped with data such as electricity rates, increases in operating costs and initial investments, the increase in consumption and demand of electricity plus the cycle time reduction were also calculated over so the simple payback 1 year and 2 months was reached

Levantamento da anurofauna da Escola do Meio Ambiente, Botucatu-SP

O objetivo do presente estudo foi realizar o inventário da anurofauna, assim como investigar a distribuição espacial, temporal e a abundância relativa das espécies localizadas em um mosaico vegetacional na região de Botucatu, SP (22 º55’ 23’’S e 45 º27’ 28’’W). A área estudada situa-se na Escola do Meio Ambiente, possui aproximadamente 12 hectares e uma grande heterogeneidade de habitats. Os dados foram obtidos entre outubro de 2006 a outubro de 2007 e entre setembro de 2009 e setembro de 2010, totalizando 29 dias de campo. Os métodos utilizados foram busca ativa e armadilhas de interceptação e queda. Foram identificadas 26 espécies de anfíbios de cinco famílias: Bufonidae (2 sp), Hylidae (15), Leptodactylidae (6), Leiuperidae (2) e Microhylidae (1), distribuídas em três grandes áreas: área aberta, mata e borda de mata. Os ambientes de área aberta foram utilizados pela maioria dos anfíbios (n=21), enquanto a borda de mata apresentou a menor riqueza (n=5). Treze espécies foram observadas na mata. As espécies Physalaemus cuvieri, e Leptodacylus furnarius foram as mais generalistas, sendo encontradas em seis e cinco dos sete ambientes estudados, respectivamente. Entre as espécies estudadas, Leptodactylus bokermanni, foi a única registrada em apenas um dos ambientes (borda da mata). As espécies mais abundantes na comunidade foram Dendropsophus nanus representando 13%, seguida de Dendropsophus sanborni e Scinax fuscomarginatus ambas com 12 % dos indivíduos. As menos abundantes foram: Rhinella icterica, Leptodactylus mystacinus e Eupemphix nattereri onde cada uma contribuiu com 0,2% dos indivíduos registrados. A grande maioria das espécies foi registrada no período quente e chuvoso (setembro a março), com exceção da espécie Scinax hiemalis que esteve presente na época fria e seca. Já Hypsiboas ...(Resumo completo, clicar acesso eletrônico abaixo)

Fibras naturais: características químicas e potenciais aplicações

This study has as objective determining the chemical properties that serve as the basis for potential scientific and technological applications of seven species of fibrous plants cultivated in Brazil, which are: Banana” (Musa spp.), “Coco” (Cocos nucifera), Curauá (Ananas erectifolius), Fique (Furcraea andina), Piteira” (Furcraea gigantea), Sisal(Agave sisalana) and “Taboa” (Typha domingensis). The tests for determining the percent dry completely, extractives soluble in cold water, in hot water, in sodium hydroxide 1% and in ethanol-toluene, and the percentages of ash, hydrophobicity, lignin, holocellulose and cellulose were performed at the Department of Environmental Sciences, Agronomy College (FCA) of UNESP – Botucatu, São Paulo State. It also presents a literature review about these fibers and their potential applications. Differences between the results obtained and those found by other authors are possibly explained by variations on the origin of plant material, the harvest season, the climate and soil where they were grown. However, the results and the methodology used, serve as a basis for further studies with natural fibers

Uso de microarray para determinação da expressão gênica diferencial em oócitos Bos Taurus Indicus e Bos Taurus Taurus submetidos ao estresse térmico

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Maturação e aquisição de tolerância à dessecação de sementes de Annona emarginata (Shltdl.) H. Rainer

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Programação térmica fetal: efeitos sobre a temperatura de preferência e características morfofisiológicas de frangos de corte

Pós-graduação em Zootecnia - FCAV

As dimensões internacionais das políticas brasileiras de combate ao tráfico de drogas na década de 1990

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A United States Information Agency e sua ação no Brasil de 1953 a 1964

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Estudo da viabilidade de implantação de plantas para conversão de energia térmica do oceano (OTEC) no Brasil

Pós-graduação em Engenharia Mecânica - FEIS

Arremessadas da turma de caminhão: literatura e experiência traumática entre as trabalhadoras boias-frias na obra de Murilo Carvalho

This article investigates the universe of women seasonal farm workers, more precisely those women laborers who take the so-called truck, in the newspaper chronicle “Th e Seasonal Farm Workers’ Express” (1976) and the short story “Th e funny face of fear”(1978), both by the journalist and creative writer Murilo Carvalho. Th e hypothesis is that these two narratives, in which the theme is the truck accident, can be classifi ed as testimonial literature.

Espanha e Brasil na construção da participação democrática: clivagens e consensos

The article searches to launch some analyses and investigations on the historical reach of produced participative processes in Spain and Brazil. Evidently, both the processes if had uncurled in historical, social, economic contexts and distinct politicians, but, exactly thus, keep some approaches that we intend to give prominence in the present article. For example, the popular mobilization in the two presented cases after occurred a long period of not attendance of social demands socials. In the same way, the processes of democratic renewal of both are related with historical landmarks “end of the Cold War” and the dismantlement of the Walfare State that introduced new rationalists in the relation between governing and governed dynamic, over all in the coinage and offer of public politics. How much to the dismantlement of the Welfare State, we present, still, that in the case of Spain it provoked consequences in the modus operandi of the formularization process and implementation of public politics. It occurred, in other words, a decentralization of its formulator power to decide arrangement of public politics that started to count on the participation of social actors in the called relational city (BECERRA, 2011). In the case of Brazil, the dictatorial period (1964-1985), the fast urban growth and the generation of precarious peripheries in the main cities, the distension and the Constituent (1986-1988) had generated the enough forces of pressure so that, gradually, if it incorporated the participative arrangement in the power to decide process. We identify that in both the cases, kept the had ratios, the instauration of a critical scene of suppression/absence of formulated public politics from an interface with the social movements were the propeller spring of the transformations in the power to decide mechanisms of formularization and implementation of public politics.

A construção da participação democrática na província da Catalunha (Espanha) e no Brasil: clivagens e consensos

The article searches to launch some analyses and investigations on the historical reach of produced participative processes in Spain and Brazil. Evidently, both the processes if had uncurled in historical, social, economic contexts and distinct politicians, but, exactly thus, keep some approaches that we intend to give prominence in the present article. For example, the popular mobilization in the two presented cases after occurred a long period of not attendance of social demands socials. In the same way, the processes of democratic renewal of both are related with historical landmarks “end of the cold war” and the dismantlement of the State of well-being that introduced new rationalists in the relation between governing and governed dynamic, over all in the coinage and offer of public politics. How much to the dismantlement of the State of social welfare, we present, still, that in the case of Spain occurred a decentralization of its formulator power to decide arrangement of public politics that started to count on the participation of social actors in the called relational city (BECERRA, 2011). In the case of Brazil, the dictatorial period (1964-1985), the fast urban growth and the generation of precarious peripheries in the main cities, the distension and the Constituent (1986-1988) had generated the enough forces of pressure so that, gradually, if it incorporated the participative arrangement in the power to decide process. We identify that in both the cases, kept the had ratios, the instauration of a critical scene of suppression/absence of formulated public politics from an interface with the social movements were the propeller spring of the transformations in the power to decide mechanisms of formularization and implementation of public politics.

Matizes do pensamento político norte-americano na virada conservadora de 1970

This paper examines how the reinvigoration of the exceptional American historical experience appears as a solution to some of the leading neoconservatives, considering Nathan Glazer and Irving Kristol as emblematic, regarding the fall of the American empire, beginning in the 1960s and 1970s, after its rise during the Cold War, the so-called 25 glorious years. We note that the arguments of these authors is rooted in the revival of reactionary rhetoric as an antidote to the decadence of American virtue supposedly caused by Communism, by the counterculture movement and the alleged perverse effect of the welfare state.

Viabilidade de sementes de Handroanthus heptaphyllus (Vell.) Mattos armazenadas nos frutos

Pós-graduação em Ciência Florestal - FCA