Browsing PPG - Química - Ciência e Tecnologia da Sustentabilidade by Issue Date
Now showing items 1-20 of 229
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Celulase e álcool desidrogenase imobilizadas em filmes de Langmuir -Blodgett para identificação de celulose e etanol no nível molecular
(Universidade Federal de São Paulo, 2013-01-07)In this study, we investigated at the molecular level the incorporation of cellulase and alcohol dehydrogenase (ADH) in Langmuir and Langmuir-Blodgett (LB) films of dipalmitoylphosphatidylcholine (DPPC). The mixed DPPC-enzyme ...
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Motores termomagneticos, linear e rotativos, acionados por energia solar
(Universidade Federal de São Paulo, 2013-01-08)This dissertation presents a study for the improvement and optimization of thermomagnetic motors of the linear reciprocating type and variable reluctance rotative type. The operating principle of such motors is the changing ...
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Estudo químico e farmacológico das cascas do tronco de Calophyllum brasiliense (Clusiaceae)
(Universidade Federal de São Paulo, 2013-03-05)In the present work, was conducted the chemical study of methanol extract from the stem barks of Calophyllum brasiliense (Clusiaceae). This extract was also evaluated for antiparasitic potential and displayed high ...
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Preparação e caracterização de filmes fotoluminescentes de blenda polifluoreno/borracha nitrílixa (PF/NBR)
(Universidade Federal de São Paulo, 2013-04-06)With the objective of obtaining homogeneous and stable films of polyfluorene, with low excimer formation in the solid state, the copolymer poly[(9,9-dioctylfluorene)-co-phenylene] (PF) was synthesized via the Suzuki reaction ...
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Estudo de reações aldólicas diretas organocatalisadas: desenvolvimento esíntese de novos organocatalisadores assimétricos
(Universidade Federal de São Paulo, 2013-04-07)The aldol reaction is one of the most efficient methodologies for the construction of carbon-carbon bonds in organic synthesis. It can be applied in the stereoselective synthesis of architecturally interesting and biologically ...
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Avaliação ambiental sobre a presença de fósforo nos ambientes aquáticos do Rio Pinheiros e da Represa Billings/SP
(Universidade Federal de São Paulo, 2013-04-10)This research had as main objective to perform an environmental assessment of the concentration levels of phosphorus (P) in sediment and water matrices, correlating them with the concentrations of aluminum (Al), calcium ...
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Estudo dos diagramas de fases Mn-Sn e Mn-Fe-Sn para aplicações em dispositivos termomagnéticos de conversão de energia térmica
(Universidade Federal de São Paul, 2013-07-05)Mn100-xSnx alloys systems (x = 3, 6, 12, 18, 21, 24, 27, 32, and 35), Mn2 and Mn3-xFexSn- xFexSn (x = 0.00, 0.25, 0.50 , 0.75, 1.00, 1.25) were prepared in the electric arc furnace and heat treated resistive furnace. The ...
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Síntese de microesferas de sílica visando a aplicações analíticas
(Universidade Federal de São Paulo, 2013-08-23)The need to create miniaturized chromatographic beds has led to the search for stationary phases based on silica formed by micrometric particles. This is because chromatographic column with a reduced internal diameter, ...
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Atividade celulolítica e proteolítica de bactérias isoladas do trato gastrointestinal e do processo de compostagem dos restos orgânicos de hipopótamo
(Universidade Federal de São Paulo, 2013-09-08)The bioprospection for cellulase and protease producers is a promiss strategy for the discovery of potential biocatalysts for use in hydrolysis of ligninocellulosic materials as well as proteic residues. These enzymes can ...
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Preparação e caracterização de híbridos elastomericos a partir da organofilização da montmorilonita com líquido iônico
(Universidade Federal de São Paulo, 2013-09-18)This work aims to obtain an elastomeric hybrid based on nitrile rubber NBR and sodic clays that have been subjected to processes organophilization. Initially, thermal, structural and morphological properties when montmorillonite ...
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Energia solar fotovoltaica na matriz elétrica brasileira um estudo de caso em edificação pública
(Universidade Federal de São Paulo, 2013-09-27)This paper presents a study on the production of electricity from the sun for self-consumption in urban planning. The system that allows this conversion, named photovoltaic solar system, uses no batteries when connected ...
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Análise química e biológica dos constituintes fixos e voláteis de Casearia sylvestris sw. (Salicaceae)
(Universidade Federal de São Paulo, 2013-10-05)The present work aimed at the isolation of the chemical constituents of C. sylvestris (Salicaceae), as well as evaluating the cytotoxic activity against tumor cell lines and assays for detection of anti-Leishmania activity ...
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Motor termomagnético acionado por energia solar fundamentada no princípio de Curie
(Universidade Federal de São Paulo, 2013-10-07)Brazil has great potential to use solar energy because of its dimensions and location. In order to benefit from this energy availability, this work aims build a rotary thermomagnetic motor based on the Curie wheel principle. ...
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Uso de zeólitas na remoção de amônio de efluentes da indústria de reciclagem de alumínio
(Universidade Federal de São Paulo, 2013-10-15)Brazil is the world's largest recycler of aluminium. However, this activity produces ammonia/ammonium-rich liquid effluents, which may cause eutrophication and intoxication of some aquatic species when discharged into local ...
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Preparação de nanopartículas de prata e seus compósitos com polímeros condutores m moldes flexíveis e líquidos iônicos
(Universidade Federal de São Paulo, 2013-11-13)Ionic liquids (IL), liquid salts at room temperature, show self-organization due to the electrostatic interactions between their ions and the van der Waals among the alkyl chains of the cationic species, being classified ...
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Avaliação da exposição ao chumbo em trabalhadores de cooperativas de reciclagem da região metropolitana de São Paulo
(Universidade Federal de São Paulo, 2013-11-29)In this study the availability and quantification of lead in recycling cooperatives and in nails of collectors of recyclable materials was performed in the metropolitan São Paulo, assessing the possible metal impacts on ...
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Conversão do glicerol utilizando catalisadores ácidos
(Universidade Federal de São Paulo, 2013-11-29)The biodiesel has been added at growing percentages to the diesel sold in Brazil since 2008 and it is currently at the rate of 5 % (B5). This percentual increase brings out the need to find new applications for glycerol, ...
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Avaliação da disponibilidade de chumbo em ambientes escolares no ensino público da cidade de Diadema
(Universidade Federal de São Paulo, 2013-12-16)This work, we have focused on the issue of lead poisoning, in the process of neurocognition of schoolchildren, and in this respect , is widely cited in the literature that lead contamination has deleterious effects on the ...
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Síntese totais convergentes de alcalóides aporfinoides empregando química de benzino
(Universidade Federal de São Paulo, 2014-01-08)The chemistry of benzyne has been successfully employed in several approaches involving the total synthesis of natural products and bioactive substances. Thus, due to the considerable importance of 2-(trimethylsilyl)aryl ...
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Desenvolvimento de uma membrana de quitosana com propriedades de barreira celular e capacidade de liberação de droga
(Universidade Federal de São Paulo, 2014-03-06)Chitosan is a water-soluble semisynthetic biopolymer with recognized potential application in the medical field because of properties such as bactericidal activity, biocompatibility, drug releasing, among others. Chitosan ...
