Peroxides
Mostrando 13-24 de 161 artigos, teses e dissertações.
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13. Biomarkers of oxidative stress and acetylcholinesterase activity in the blood of grass snake (Natrix natrix L.) during prehibernation and posthibernation periods
This work examined the enzymatic (superoxide dismutase-CuZn SOD, catalase-CAT, glutathione peroxidase-GSHPx, glutathione reductase-GR, and the biotransformation phase II enzyme glutathione-S-transferase-GST) and nonenzymatic (total glutathione-GSH and lipid peroxides-TBARS concentrations) biomarkers of oxidative stress and acetylcholinesterase (AChE) activit
Braz. arch. biol. technol.. Publicado em: 06/03/2015
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14. Hepatoprotective efficacy of Hypnea muciformis ethanolic extract on CCl4 induced toxicity in rats
The ethanolic extract of Hypnea muciformis (red algae) was tested for hepatoprotective activity against experimentally induced liver damage by Carbon tetrachloride (CCl4) in male albino rats. The levels of serum enzymatic and biochemical parameters such as serum glutamate oxaloacetate transaminase (SGOT), Serum glutamate pyruvate transaminase (SGPT), alkalin
Braz. arch. biol. technol.. Publicado em: 2012-12
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15. Synthesis of unstable cyclic peroxides for chemiluminescence studies
Peróxidos cíclicos de quatro membros são intermediários de alta energia importantes em diversas transformações quimi e bioluminescentes. Especificamente, α-peroxilactonas (1,2-dioxetanonas) têm sido consideradas sistemas modelo para a eficiente bioluminescência do vaga-lume. Contudo, a preparação deste tipo de compostos altamente instáveis é ext
J. Braz. Chem. Soc.. Publicado em: 2012-11
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16. Effect of whitening toothpaste on titanium and titanium alloy surfaces
Dental implants have increased the use of titanium and titanium alloys in prosthetic applications. Whitening toothpastes with peroxides are available for patients with high aesthetic requirements, but the effect of whitening toothpastes on titanium surfaces is not yet known, although titanium is prone to fluoride ion attack. Thus, the aim of the present stud
Braz. oral res.. Publicado em: 19/07/2012
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17. Avaliação dos efeitos da corrida de maratona nos marcadores de estresse oxidativo, inflamatórios e miocárdicos / Assessment of the marathon race effects on oxidative stress, inflammatory and myocardial markers
The beneficial effects of regular, moderate exercise are well estabilished. On the other hand, the effects caused by the heavy and exhaustive exercise for longer periods are controversial. Some of these unpleasant effects. may be oxidative stress, the oxidation of the native LDL and acuse phase inflammatory response. Objective: Assess these variables in mara
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/07/2011
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18. Estabilidade oxidativa de queijo prato adicionado de luteína / Oxidative stability of cheese prato added with lutein
Lutein is associated with the reduction and prevention of age-related macular degeneration (ARMD), the main cause of irreversible blindness in the elderly. As this carotenoid is not synthesized by the human organism, its addition in cheese Prato is an option to lutein supplementation in the diet, beyond being able to act in the prevention of photo-oxidation.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2011
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19. Long-term efficacy of denture cleansers in preventing Candida spp. biofilm recolonization on liner surface
This study evaluated the long-term efficacy of denture cleansers against Candida spp. biofilm recolonization on liner surface. Specimens were fabricated of a poly(methyl methacrylate)-based denture liner and had their surface roughness evaluated at baseline and after cleansing treatments. C. albicans or C. glabrata biofilms were formed on liner surface for 4
Brazilian Oral Research. Publicado em: 2010-09
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20. Evaluation of polypropylene/saw dust composites prepared with maleated polypropylene (mapp) produced by reactive extrusion
Considering the importance of the environment and fuel economy, the Brazilian automotive industry has focused on the development of lightweight materials based on renewable resources. Replacement of PP- talc composite by PP- saw dust composite is a promising possibility. This paper presents the preparation of maleated polypropylene (MAPP) through reactive ex
Matéria (Rio de Janeiro). Publicado em: 2010
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21. EFEITO DE AGENTES CLAREADORES À BASE DE PERÓXIDO DE HIDROGÊNIO SOBRE A FLUORESCÊNCIA DE RESINAS COMPOSTAS / EFFECT OF HYDROGEN PEROXIDE BLEACHING AGENTS ON FLUORESCENCE OF COMPOSITE RESINS
Devido à crescente busca por um sorriso estético, a procura por procedimentos menos invasivos, como a restauração em resina composta e o clareamento dental, também aumentou. As resinas compostas apresentam propriedades ópticas, sendo que uma destas propriedades é a fluorescência, que destina-se a dar naturalidade à restauração mimetizando-as à de
Publicado em: 2010
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22. AVALIAÇÃO VOLTAMÉTRICA DOS ÍONS METÁLICOS (COBRE, CÁDMIO E CHUMBO) EM AMOSTRAS DE COMBUSTÍVEIS PREVIAMENTE DIGERIDAS EM MICROONDAS USANDO ELETRODO QUIMICAMENTE MODIFICADO POR SAIS TETRAZÓLIOS / EVALUATION OF METAL IONS VOLTAMMETRY(COPPER, CADMIUM AND LEAD) IN SAMPLES OF FUELS PREVIOUSLY DIGESTED IN USING MICROWAVE ELECTRODE CHEMICALLY MODIFIED BY SALTS TETRAZOLIUM.
This paper describes an analytical procedure for determination of trace metals copper, cadmium and lead in fuel samples, using Basal Plane Pyrolytic Graphite Modified Electrode (BPPGME) by tetrazolium salts: ([3,3 - (3-3 -dimethoxy-4, bifenililen 4 -bis [2 - (4-nitrophenyl)-5-phenyl-2H-tetrazolium (NBT) Cl 3 - (4,5 - dimetitiazol-2il) -2,5-diphenyl-2H-Tetraz
Publicado em: 2010
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23. ESTUDO DO EFEITO DE UM GEL NEUTRALIZADOR À BASE DE CATALASE NA LIBERAÇÃO DO OXIGÊNIO RESIDUAL DA ESTRUTURA DENTAL APÓS EXPOSIÇÃO AO PERÓXIDO DE CARBAMIDA / STUDY OF THE EFFECT OF A CATALASE-BASED NEUTRALIZER GEL IN THE RELEASE OF RESIDUAL OXYGEN FROM THE TOOTH STRUCTURE AFTER EXPOSURE TO CARBAMIDE PEROXIDE
Foram avaliados, in vitro, os efeitos de um gel neutralizador à base de Catalase, na liberação do oxigênio residual em dentes humanos permanentes expostos ao peróxido de carbamida 10% (Whitness perfect 10%). Os terceiros molares foram divididos em espécimes medindo 5X5X3 mm2 e distribuídos aleatoriamente em 3 grupos: G1 - controle negativo não clarea
Publicado em: 2010
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24. Modificação do LLDPE através de silanos viabilizando a aplicação em camadas plásticas de linhas flexíveis / Study of silane grafting reactions of low density polyethylene for pipe applications
The flexible lines are flexible structures manufactured through plastic and steel layers that allows its use in order to permit fluid flow in exploration and production of hydrocarbon between offshore oil units and sea bed and/or coast. Nowadays these pipes are one of the main ways to permit the exploration of hydrocarbon in deepwater. The present study aims
Publicado em: 2009