Estudo da prevalência de fungos em travesseiros de crianças com rinite e, ou, asma

Pós-graduação em Biologia Geral e Aplicada - IBB

Prospecção biomonitorada de inibidores da secreção de histamina obtidos a partir do extrato de Hymenacea stigonocarpa Mart. ex. Hayne (Fabaceae)

Pós-graduação em Biologia Geral e Aplicada - IBB

Análise de nanoestruturas por espectroscopia de impedância para células fotoeletroquímicas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Efeito da palha na disponibilidade do herbicida amicarbazone na solução do solo em áreas cultivadas com cana-de-açúcar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Degradação de antibióticos sulfonamidas por processo foto-Feton: identificação de intermediários

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fotodegradação de fármacos por procesos oxidativos avançados utilizando fonte de irradiação artificial e solar: avaliação química e toxicológica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Degradação de poluentes orgânicos utilizando filmes de TiO2 modificados com íons prata

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Células solares de ZnO:Ga nanocristalino sensibilizado por corante

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Desenvolvimento e otimização de materiais nanocristalinos para células solares sensibilizadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação da degradação fotoquímica de corante alimentício e lixiviação de corantes têxteis de fibras de algodão expostos a suor sintético por método cromatográficos

Pós-graduação em Química - IQ

Photoelectrochemical Hydrogen Generation and Concomitant Organic Dye Oxidation under TiO2 Nanotube

The present work describes the photoelectrochemical hydrogen generation during a photodegradation of an organic compound. For this, it was chosen the reactive black 5 dye as a model of organic pollutant and its oxidation under TiO2 nanotube in a two compartment cell. The photoelectrocatalysis is conducted in 0.1 mol L-1 Na2SO4 pH 6 medium under photoanode biased at +1.0 V (SCE) and activated by UV and visible light using 150W Xe-Arc lamp (Oriel) and 125 W Hg lamp (Osram). The concomitant hydrogen production was monitored at cathodic compartment using a Pt cathode. Using optimized condition of Na2SO4 0.1 mol L-1 pH 6 as supporting electrolyte, applied potential of +1.0V it was verified 100% of discoloration and 72% of TOC removal of 1.0 x 10(-5) mol L-1 Reactive Black 5 dye after 120 min of treatment (rate constant of 10.6 x10(-2) min(-1)). The concomitant hydrogen generation was 44% in this condition.

Effect of a Polymeric Protective Coating on Optical and Electrical Properties of Poly(p-phenylene vinylene) Derivatives

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Light-Induced Structural Change in Iridium Complexes Studied by Electron Spin Resonance

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Comparison of the performance of natural latex membranes prepared with different procedures and PTFE membrane in guided bone regeneration (GBR) in rabbits

This work assessed the performance of membranes made of natural latex extracted from Hevea brasiliensis prepared with three different methods: polymerized immediately after collection without the use of ammonia (L1); polymerized after preservation in ammonia solution (L2); and polymerized after storage in ammonia, followed by Soxhlet technique for the extraction of substances (L3). Polytetrafluoroethylene (PTFE) membrane was used as control. Two 10-mm diameter bone defects were surgically made in the calvaria of thirty adult male New Zealand rabbits. Defects (total n = 60) were treated with guided bone regeneration (GBR) using L1, L2, L3 or PTFE membranes (n = 15 for each membrane). Ten animals were euthanized after 7, 20 and 60 days postoperatively so that five samples (n = 5) of each treatment were collected at each time, and bone regeneration was assessed microscopically. The microscopic analysis revealed defects filled with blood clot and new bone formation at the margins of the defect in all 7-day samples, while 20-day defects were mainly filled with fibrous connective tissue. After 60 days defects covered with L1 membranes showed a significantly larger bone formation area in comparison to the other groups (P < 0.05, ANOVA, Tukey). Additionally, bone tissue hypersensitization for L1 and PTFE membranes was also investigated in six additional rabbits. The animals were subjected to the same surgical procedure for the confection of one 10-mm diameter bone defect that was treated with L1 (n = 3) or PTFE (n = 3). Fifty-three days later, a second surgery was performed to make a second defect, which was treated with the same type of membrane used in the first surgery. Seven days later, the animals were euthanized and samples analyzed. No differences among L1 and PTFE samples collected from sensitized and non-sensitized animals were found (P > 0.05, Kruskal-Wallis). Therefore, the results demonstrated that latex membranes presented performance comparable to PTFE membranes, and that L1 membranes induced higher bone formation. L1 and PTFE membranes produced no hypersensitization in the bone tissue.

Spectroscopic, luminescence and in vitro biological studies of solid ketoprofen of heavier trivalent lanthanides and yttrium(III)

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