Advanced Oxidative Process
Mostrando 25-33 de 33 artigos, teses e dissertações.
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25. Degradação de BTXs via processos oxidativos avançados
In this study the efficiency of advanced oxidative processes (AOPs) were investigated toward the degradation of aqueous solutions containing benzene, toluene and xylenes (BTX). The results indicated that BTX can be effectively oxidized by the UV-A-assisted photo-Fenton process. The treatment permits almost total degradation of BTX and removal of more than 80
Química Nova. Publicado em: 2005-02
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26. Uso de processos oxidativos avançados e ferro elementar na remediação de agua subterranea contendo compostos organoclorados / Use of advanced oxidation process and zero valent ironinremediation of groundwater containing chlorinated compounds
The remediation of groundwater containing organochlorine compounds was evaluated in this work using UV (photolysis), Fenton (H2O2/Fe) and photo-Fenton (UV/H2O2/Fe). A reductive system using zero valent iron aiming the reductive dehalogenation of the compounds has also been tested. All the experiments were performed using an upflow reactor operating in a reci
Publicado em: 2005
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27. Especiação e remoção de arsenio de aguas utilizando voltametria de redissolução catodica e processos oxidativos avançados / Arsenic speciation and removal from waters employing stripping voltammetry and advanced oxidatives process
Arsenic exists in various chemical forms in the environment, including as organic and inorganic species, originating from natural and anthropogenic sources. As for other potential toxic elements, the concentration limit for arsenic in drinking water is decreasing as a result of observed chronic poisoning coming from low exposure doses. In drinking water, the
Publicado em: 2005
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28. Recuperação de sílica-gel utilizando processos oxidativos avançados: uma alternativa simples e de baixo custo
Silica gel is widely used as adsorbent for isolating and purifying natural compounds. Intensive use and high cost make this process expensive and generate solid residues contaminated with many different organic compounds. In the present work a simple method for recycling silica was investigated, by using Advanced Oxidative Processes. Silica gel was treated w
Química Nova. Publicado em: 2003-12
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29. Desenvolvimento de fibras de carbono e precursores de alto valor agregado a partir de oleo decantado
The main objectives in this study are the process development to convert decanted oil into petroleum pitches and monofilament carbon fiber obtaining both from isotropic and mesophase petroleum pitch precursors. Decanted oil is the residue from the petroleum catalytic cracking unit. Carbon fibers were also produced using commercial mesophase made from naphtha
Publicado em: 2002
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30. How hyperglycemia promotes atherosclerosis: molecular mechanisms
Both type I and type II diabetes are powerful and independent risk factors for coronary artery disease (CAD), stroke, and peripheral arterial disease. Atherosclerosis accounts for virtually 80% of all deaths among diabetic patients. Prolonged exposure to hyperglycemia is now recognized a major factor in the pathogenesis of atherosclerosis in diabetes. Hyperg
BioMed Central.
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31. BCL-2 expression or antioxidants prevent hyperglycemia-induced formation of intracellular advanced glycation endproducts in bovine endothelial cells.
Hyperglycemia rapidly induces an increase in intracellular advanced glycation end products (AGEs) in bovine endothelial cells, causing an alteration in bFGF activity (Giardino, I., D. Edelstein, and M. Brownlee. 1994. J. Clin. Invest. 94:110-117). Because sugar or sugar-adduct autoxidation is critical for AGE formation in vitro, we evaluated the role of reac
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32. In vivo action of 15-lipoxygenase in early stages of human atherogenesis.
Oxidative modification of low density lipoprotein has been suggested as patho-physiologically relevant process in atherogenesis and the lipid peroxidizing enzyme 15-lipoxygenase may be involved. For experimental evidence on the in vivo action of this enzyme in the time course of plaque formation we analyzed the lipid extracts of lesional areas representing v
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33. Postnatal growth and differentiation of muscle fibres in the mouse. I. A histochemical and morphometrical investigation of normal muscle.
A histochemical classification of muscle fibres based on three enzymes (ATPase, pre-inc. pH 4:35; succinic dehydrogenase and alpha-glycerol-phosphate-dehydrogenase) was used to describe postnatal growth and differentiation of muscle fibres. The m. soleus, m. plantaris and m. gastrocnemius were examined in normal mice from birth to the young adult stage. At b