Redox Indicators
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Avaliação de diferentes estratégias de biorremediação no tratamento de solo contaminado por diesel B5 / Evaluation of different biorremediation strategies in the treatment of soil contaminated by diesel B5
No Brasil, a contaminação do solo por derramamentos de combustíveis representa um dos mais graves problemas ambientais e o impacto da introdução de novas misturas como diesel/biodiesel na matriz energética requer investigação quanto a tecnologias apropriadas de remediação. O presente estudo teve por objetivo avaliar diferentes estratégias de biorr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/07/2010
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2. As comunidades macrobentÃnicas na avaliaÃÃo da qualidade ambiental de Ãreas estuarinas de Pernambuco
Estuarine environments are known by its importance in terms of complexity and biodiversity; however, anthropogenic activities continue to have a detrimental effect on its biodiversity levels on a worldwidescale. Several studies have emphasized the role of benthic macroinvertebrates as indicators of environmental quality status in these ecosystems, which have
Publicado em: 2009
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3. O cha verde (Camellia sinensis) atenua a nefropatia atraves da redução da expressão da subunidade NOX-4 da ND(P)H oxidase no diabetes mellitus experimental / Green tea (Camellia sinensis) attenuates nephropath by downregulating Nox4 NADPH oxidase in experimental diabetes mellitus
It has been suggested that green tea (GT) has beneficial properties in the treatment or prevention of human disease. The major biological mechanisms of action of GT are being attributed to its antioxidant properties. Several lines of evidence suggest that oxidative stress contributes to the pathogenesis of diabetic nephropathy. The effect of GT on diabetic n
Publicado em: 2008
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4. Desenvolvimento de sensor bioletroquímico para detecção da hanseníase
Leprosy is a chronic, granulomatous and dermatological disease, from infection caused by the bacillus Mycobacterium leprae. It is object of intervention of the state, because when untreated cause disability in the economically active population. Brazil remains one of the four endemic countries responsible for 34% of all cases registered at the beginning of 2
Publicado em: 2008
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5. Comparação dos índices de qualidade da água e usos do fator contaminação e índice de geoacumulação para os sedimentos da microbacia do arroio João Corrêa, São Leopoldo, RS, Brasil
The João Corrêa creek, with 7 km length and a 9.7 km2 micro basin (MbaJC), has its main source into the forested hilly landscape of Sapucaia county and flows trough out the São Leopoldo city, receiving along his course several urban wastes and industrial effluents. Looking for a quantified evaluation of environmental impacts related to human activities, m
Publicado em: 2008
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6. Qualidade da água e fluxos de nutrientes na interface sedimento-água nas represas do Rio Tietê.
The first Law of Fick in one dimension was utilized for the calculation of those fluxes. In this work was calculated the concentrations of the following chemical species: nitrate, nitrite, ammonium, total nitrogen, orthophosphate, total phosphorus, dissolved organic carbon (DOC), cloride, fluoride, sulfate and silica reactive, as well as the biogeochemicals
Publicado em: 2003
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7. Drought-Induced Changes in the Redox State of α-Tocopherol, Ascorbate, and the Diterpene Carnosic Acid in Chloroplasts of Labiatae Species Differing in Carnosic Acid Contents1
To assess antioxidative protection by carnosic acid (CA) in combination with that of other low-molecular weight (Mr) antioxidants (α-tocopherol [α-T] and ascorbate [Asc]) in chloroplasts, we measured endogenous concentrations of these antioxidants, their redox states, and other indicators of oxidative stress in chloroplasts of three Labiatae species, diffe
American Society of Plant Biologists.
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8. Cell surface redox potential as a mechanism of defense against photosensitizers in fungi.
The phytotoxin cercosporin, a singlet oxygen-generating photosensitizer, is toxic to plants, mice, and many fungi, yet the fungi that produce it, Cercospora spp., are resistant. We hypothesize that resistance to cercosporin may result from a reducing environment at the cell surface. Twenty tetrazolium dyes differing in redox potential were used as indicators
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9. Dichlorophenylurea-insensitive Reduction of Silicomolybdic Acid by Chloroplast Photosystem II
The photoreduction of silicomolybdate and other heteropoly ions by chloroplasts is insensitive to 3-(3, 4-dichlorophenyl)-1, 1-dimethylurea (DCMU). Both water and diphenylcarbazide can be used as electron source for the reduction. Three different assays for silicomolybdate reduction are described including oxygen evolution, formation of a reduced heteropoly
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10. Light Induced Polarity of Redox Reactions in Leaves of Elodea canadensis Michx 1
This paper reports that extracellular reductase activity in leaves of Elodea canadensis, hitherto never associated with polar processes thought to be involved in bicarbonate utilization, also shows a very marked polarity in light. The effect of ferricyanide, applied to the lower side of illuminated leaves, was a depolarization of the membrane electrical pote
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11. Effect of Anaplerotic Fluxes and Amino Acid Availability on Hepatic Lipoapoptosis*
To identify metabolic pathways involved in hepatic lipoapoptosis, metabolic flux analysis using [U-13C5]glutamine as an isotopic tracer was applied to quantify phenotypic changes in H4IIEC3 hepatoma cells treated with either palmitate alone (PA-cells) or both palmitate and oleate in combination (PA/OA-cells). Our results indicate that palmitate inhibited gly
American Society for Biochemistry and Molecular Biology.
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12. Atmospheric analysis and redox potentials of culture media in the GasPak System.
Oxygen and carbon dioxide concentrations, internal atmospheric pressure, catalyst temperature, and time of appearance of water condensate were monitored for various time intervals at ambient (20 to 25 degrees C) temperature in a GasPak 100 Anaerobic System (BBL Microbiology Systems, Cockeysville, Md). Simultaneously, the redox potential (Eh) of various plate