Ferrous
Mostrando 25-36 de 473 artigos, teses e dissertações.
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25. Conflitos ambientais: uma análise da assimetria de poder entre os atores sociais envolvidos no caso do Mineroduto da Ferrous
RESUMO Este trabalho intenta apresentar o conflito ambiental instaurado em razão da instalação do mineroduto da Ferrous Ressources S/A, na microrregião de Viçosa-MG, construindo uma análise do posicionamento dos principais atores sociais envolvidos, assim como suas respectivas relações de poderes. O mineroduto da Ferrous ligará o complexo da Mina da
Soc. nat.. Publicado em: 2015-12
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26. Non-Thermal Plasma Induced Total Mineralization of Glyphosate in Water in the Presence of Iron II Ions
The present work focused on the mineralization of herbicide glyphosate (N-(phosphonomethyl) glycine) (C3H8NO5P) in aqueous phase by Glidarc plasma following the orthophosphates released and the reduction of the total organic carbon (TOC). Furthermore, the effect of initial concentration, pH and the degradation process of glyphosate in the presence of Fe2+ we
J. Braz. Chem. Soc.. Publicado em: 2015-03
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27. Screening of iron-enriched fungus from natural environment and evaluation of organically bound iron bioavailability in rats
Iron is an essential element for nearly all living organisms, and its deficiency is the most common form of malnutrition in the world. The organic forms of trace elements are considered more bioavailable than the inorganic forms. Although Saccharomyces cerevisiae can enrich metal elements and convert inorganic iron to organic species, its tolerability and tr
Food Sci. Technol. Publicado em: 2015-03
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28. Augmentation of wear-protective coatings for non-ferrous alloys by the addition of Cr and Ni elements
A number of Al-, Mg- and Ti-base alloys were preconditioned by oxidation via Plasma-electrolytic oxidation (PEO) followed by the addition of Cr and Ni elements in the coating pores by chemical precipitation and a final stage of mechanical treatment. The overall effect was a combination of hardness and resistance to wear. PEO voltage level was found to be a f
Mat. Res.. Publicado em: 2014-12
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29. Myoglobin entrapment in poly(vinyl alcohol) dense membranes
Our goal in this study was the immobilization of myoglobin in poly(vinyl alcohol) dense membranes. Glutaraldehyde was investigated both as the crosslinking agent, aiming to increase the membrane stability in aqueous medium, and as the vehicle to bind myoglobin and PVA. Reaction and membrane synthesis were carried simultaneously in mild operating conditions i
Braz. J. Chem. Eng.. Publicado em: 2014-09
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30. The uptake of different iron salts by the yeast Saccharomyces cerevisiae
Yeasts can be enriched with microelements, including iron; however, special physicochemical conditions are required to formulate a culture media that promotes both yeast growth and iron uptake. Different iron sources do not affect biomass formation; however, considering efficacy, cost, stability, and compatibility with Saccharomyces cerevisiae metabolism, fe
Braz. J. Microbiol.. Publicado em: 2014-06
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31. Extraction optimization of antioxidant polysaccharides from leaves of Gynura bicolor (Roxb. & Willd.) DC
Orthogonal design was employed to study the effect of extraction time, temperature and liquid-to-solid ratio on the production of antioxidant polysaccharides from leaves of Gynura bicolor (PLG). Analysis of variance was performed on the data obtained. The most relevant variable was extraction time. A liquid-solid ratio of 30:1 (v/w), a temperature of 80 °C
Food Sci. Technol. Publicado em: 2014-06
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32. Iron deficiency anemia among kindergarten children living in the marginalized areas of Gaza Strip, Palestine
Background: iron deficiency anemia is the most common type of nutritional anemia; it has been recognized as an important health problem in Palestine. This study was conducted to estimate the prevalence and to identify possible risk factors of iron deficiency anemia among kindergarten children living in the marginalized areas of the Gaza Strip and to evaluat
Rev. Bras. Hematol. Hemoter.. Publicado em: 2014-04
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33. Evaluation of iron bioavailability in a mixture of cereals, seeds, and grains ("Human Ration")
Iron bioavailability was evaluated in three mixtures of cereals, seeds, and grains ("Human Ration"): light, regular, and homemade provided to rats. The animals received an iron depletion diet for 21 days, followed by a repletion diet containing 12 mg·kg-1 of iron for 14 days. The hemoglobin regeneration efficiency and the relative biological value did not d
Food Sci. Technol. Publicado em: 25/02/2014
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34. Sinterability and microstructure evolution during sintering of ferrous powder mixtures
The present work is focused on ferrous powder metallurgy and presents some results of a development of a suitable masteralloy for use as an additive to iron powder for the production of sintered steels. The masteralloy was produced by melting a powder mixture containing approximately Fe + 20% Ni + 20% Mn + 20% Si + 1% C (wt%), in order to obtain a cast bille
Mat. Res.. Publicado em: 28/05/2013
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35. Efeito do acetato de chumbo associado ou não ao sulfato ferroso em cérebro de ratos: análise das enzimas antioxidantes / Effect of lead acetate with or without iron sulfate in brain of rats: Analysis of antioxidant enzymes
Lead (Pb2+) is a toxic heavy metal, found in all stages of the inert environment and in several biological systems. When uptaken by the organism, acts on several organs and systems and may cause severe damage in Central Nervous System. In addition, it has been reported that iron (Fe2+) may present, a protective effect on neurotoxicity caused by Pb2+. Therefo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/09/2012
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36. Estudo da microestrutura, da textura cristalográfica e da recristalização em chapas obtidas por lingotamento contínuo e semicontínuo da liga de alumínio AA4006. / A study of the microstructure, crystallographic texture, and recrystallization in AA4006 alloy strips produced by twin roll caster and direct chill processes.
A liga de alumínio designada AA4006 é muito utilizada na indústria. É uma liga do sistema Al-Fe-Si, com teores (% em massa) de Si na faixa de 0,8 a 1,2% e Fe entre 0,5 e 0,8%. Apesar de ser bastante utilizada, ela foi pouco estudada. Neste trabalho foi realizado um estudo comparativo da microestrutura e da textura cristalográfica entre chapas da liga AA
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012