Chlorides
Mostrando 25-36 de 135 artigos, teses e dissertações.
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25. SÍNTESE DE N-GLICOSILSULFONAMIDAS DERIVADAS DE D-GLICOSE E N-ACETILGLICOSAMINA
Herein, we report the synthesis of β-N-glycosylsulfonamides derivatives of D-glucose and N-acetylglucosamine using conventional methods. We also describe a procedure that allows the preparation of these compounds in good yields without the anomerization of the intermediate glycosylamines. This method includes the intermediates obtained from the less reactiv
Quím. Nova. Publicado em: 2015-09
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26. Synthesis and characterization of new soluble polyamides from Acenaphtohydrazinomercaptotriazole diamine
AbstractA diamine Acenaphtohydrazinomercaptotriazole (AHTD) was synthesized in one step from acenaphthoqinone and 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole. The diamin was characterized by FTIR, 1HNMR, 13CNMR and melting point. Diamin was used to prepare novel polyamides. The low temperature solution polycondensation of diamin with tow aromatic and tow a
Polímeros. Publicado em: 2015-08
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27. Adsorption of Transition Metal Chlorides by Silica with Grafted 1-n-Propyl-3-Methylimidazolium Chloride
Silica with grafted 1-n-propyl-3-methylimidazolium chloride was investigated as adsorbent for the removal of cobalt(II), copper(II), zinc(II), cadmium(II) and mercury(II) chlorides from alcoholic and aqueous solutions. The adsorption proceeds via the formation of metal-chloride anionic complexes detained near the grafted organic cations as counterions. This
J. Braz. Chem. Soc.. Publicado em: 2015-06
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28. PREPARATION AND PERFORMANCE STUDIES ON POLYETHERSULFONE ULTRAFILTRATION MEMBRANES MODIFIED WITH GELATIN FOR TREATMENT OF TANNERY AND DISTILLERY WASTEWATER
Abstract In this study polyethersulfone ultrafiltration membrane were prepared with the modifier gelatin at 0, 5, 10, 15 and 20 wt % using DMF as solvent by phase inversion process. Morphologies and characteristics of the membranes were investigated through the methods of SEM, XRD, contact angle measurements. The performance of the modified membrane for the
Braz. J. Chem. Eng.. Publicado em: 2015-03
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29. Markov Chains and reliability analysis for reinforced concrete structure service life
From field studies and the literature, it was found that the degradation of concrete over time can be modelled probabilistically using homogeneous Markov Chains. To confirm this finding, this study presents an application of Markov Chains associated with the reliability analysis of experimental results of the degradation of concrete by chlorides. Experimenta
Mat. Res.. Publicado em: 30/05/2014
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30. Ésteres de cloropropanóis e de glicidol em alimentos
Chloropropanols are a well-known group of food processing contaminants. They are formed through the reaction between lipids and chlorides when submitted to thermal treatment, and can be found in free and bound form. Although free chloropropanols were identified around 30 years ago, the occurrence of bound forms, especially 3-MCPD, and glycidyl fatty acid est
Quím. Nova. Publicado em: 2013
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31. CaracterizaÃÃo FÃsica, QuÃmica e BiolÃgica da Ãgua na Sub-Bacia B1, do Rio CocÃ, Fortaleza-CE, com Ãnfase nos Aspectos da PoluiÃÃo ao Longo de um Ciclo ClimÃtico / Characterization Physical, Chemical and Biological Water in Sub-Basin B1, Rio Coco, Fortaleza-CE, with Emphasis on Aspects of Pollution Along a Climate Cycle
This study aimed to evaluate the physical, chemical, biological, and the occurrence of both the acute toxicity and the diversity and quantity of phytoplankton biomass, along a climatic cycle, on sub-basin B1, a member of the Cocà River basin, Fortaleza - CE. The sampling occurred monthly on fourteen collecting points in the period of September 2010 to April
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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32. Detecção de resíduos de soluções sanitizantes empregadas em pedilúvio para bovinos no leite e solo / Residues detection of sanization solution used in foot bath for bovines in milk and soil
Apesar do hipoclorito de sódio e o sulfato de cobre serem compostos químicos utilizados na preparação de soluções empregadas em pedilúvio para bovinos, visando o tratamento e prevenção de enfermidades digitais, são escassas as informações técnicas com relação à produção de resíduos por estas substâncias nos produtos de origem animal. O ob
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/07/2011
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33. Detecção de resíduos de soluções sanitizantes empregadas em pedilúvio para bovinos no leite e solo / Residues detection of sanization solution used in foot bath for bovines in milk and soil
Apesar do hipoclorito de sódio e o sulfato de cobre serem compostos químicos utilizados na preparação de soluções empregadas em pedilúvio para bovinos, visando o tratamento e prevenção de enfermidades digitais, são escassas as informações técnicas com relação à produção de resíduos por estas substâncias nos produtos de origem animal. O ob
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/07/2011
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34. Corrosion of reinforcing bars embedded in alkali-activated slag concrete subjected to chloride attack
Steel bar embedded in an alkali-activated slag (AAS) concrete was tested under complete immersion, in 3.5% NaCl solution by weight of the slag. Ordinary Portland cement (OPC) was also tested for comparative purposes and exposed to the same solution. Monitoring of open-circuit potential, polarization resistance measurement and electrochemical impedance spectr
Materials Research. Publicado em: 13/12/2011
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35. Anaerobic treatment of cellulose bleach plant wastewater: chlorinated organics and genotoxicity removal
This study assessed the removal efficiency of organic matter and how it relates to the decrease of toxic and mutagenic effects when an anaerobic reactor is used to treat the bleaching effluent from two kraft pulp mills. Parameters such as COD (chemical oxygen demand), DOC (dissolved organic carbon), AOX (adsorbable organic halogen), ASL (acid soluble lignin)
Brazilian Journal of Chemical Engineering. Publicado em: 2011-12
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36. Chloride diffusivity in red mud-ordinary portland cement concrete determined by migration tests
Red mud, which is a solid waste produced in the alumina production process, is classified as dangerous due to its high pH. In this work, the concentration of chlorides was monitored by measuring the conductivity of the anolyte, which initially was distilled water. The steady and nonsteady-state chloride diffusion coefficients were estimated from the "time la
Mat. Res.. Publicado em: 06/05/2011