Electrolytes Salt
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Corrosion resistance of rolled and rerolled super martensitic steel in media containing chlorides and hydrogen sulfide
ABSTRACT In the oil and gas industry, super matensitic steels have been used primarily in the manufacture of seamless steel pipe for use in drilling oil and gas. The objective of this work is to evaluate the corrosion resistance of rolled and rerolled super martensitic steels in electrolytes of aqueous solution of NaCl 35 g/L, and aqueous solution of NaCl 12
Matéria (Rio J.). Publicado em: 02/10/2017
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2. Influence of salts on the coexistence curve and protein partitioning in nonionic aqueous two-phase micellar systems
Aqueous two-phase micellar systems (ATPMS) can be exploited in separation science for the extraction/purification of desired biomolecules. Prior to phase separation the surfactant solution reaches a cloud point temperature, which is influenced by the presence of electrolytes. In this work, we provide an investigation on the cloud point behavior of the nonion
Braz. J. Chem. Eng.. Publicado em: 2014-12
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3. Propiedades eléctricas en membranas de complejos electrolitos poliméricos PVA-OH/LI2SO4/PEG400
Lithium ion conducting polymer electrolytes based on polyvinyl Alcohol (PVA-OH) complexed with salt Li2SO4 and different weight percent ratios of PEG400 plasticizer have been prepared by solution cast technique using deionized water as solvent. The thermogravimetric analysis (TGA) showed that the thermal stability of the materials depended on the plasticizer
Polímeros. Publicado em: 2014
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4. BIOCHEMICAL AND PHYSIOLOGICAL RESPONSES OF Cucumis sativus AND Avena sativa TO EXCESS ALUMINUM STRESS. / RESPOSTAS BIOQUÍMICAS E FISIOLÓGICAS DE Cucumis sativus E Avena sativa AO ESTRESSE CAUSADO POR ALUMÍNIO
Aluminum (Al) is the most abundant metal in the Earth s crust, affecting growth and development of plants. The aim of this study was to investigate the effects of Al on seedlings of cucumber (Cucumis sativus L.) and oat (Avena sativa L) through the analysis of biochemical and physiological parameters. Three different genotypes of oat seedlings were studied,
Publicado em: 2010
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5. Níveis de sódio e cloro para codornas italianas destinadas à produção de carne / Levels of Italian sodium and chlorine for codornas destined the meat production
Dois experimentos foram conduzidos para determinar os melhores níveis nutricionais de sódio e cloro para codornas italianas destinadas à produção de carne (1 a 49 dias de idade). Em cada experimento, 384 codornas com um dia de idade foram distribuídas em um delineamento inteiramente casualizado, com seis tratamentos e oito repetições de oito aves por
Publicado em: 2009
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6. Avaliação do efeito do sal volatil carbamato de amonio sobre a estabilidade de enzimas / Evaluation of the effect of ammonium carbamate on the stability of enzymes
Salting-out is a precipitation method frequently found in downstream processing schemes of proteins. However, the need for post-precipitation treatment for salt recovery and final purification of the protein may lead precipitation with conventional salts to be costly and limited for environmental questions. Precipitation with Volatile salts is an alternative
Publicado em: 2008
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7. Thermodynamic modeling of aqueous two phase systems containing salts and polymers. / Modelagem termodinâmica de sistemas aquosos bifásicos contendo sais e polímeros.
The thermodynamic modeling of phase equilibrium in aqueous two phase systems containing the neutral polymer poly(ethylene glycol) and a salt was studied in this work. The implemented model is based on the Pitzer equation for electrolytes solutions, modified in order to account for the influence of polymer properties in both the medium dielectric constant and
Publicado em: 2008
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8. Eletrólitos poliméricos a partir de amidos de mandioca modificados (catiônico, eterificado e oxidado) / Electrolytes polimerics from modified cassava starches (cationic, etherified and oxidated)
Natural polymers are very interesting matrix to obtain solid polymeric electrolytes (SPE). The principal advantage comes from its particularly interesting biodegradation properties due to the natural precedence and also very low cost and good physical and chemical properties. These polymers contain heteroatoms in its structure and for this reason can complex
Publicado em: 2007
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9. Evaluation of the liquid-liquid extraction process with salt addition for organic acid recovery and purification / Avaliação do processo de extração liquido-liquido com a adição de sais para recuperação e purificação de acidos organicos
This study aims a critical evaluation of the liquid-liquid extraction process of organic acids, produced by fermentation. The organic acids of interest in this work are: citric acid, malic acid, succinic acid and tartaric acid. The study includes the recovery and the purification of the chosen organic acids, the thermodynamic characterization of the systems,
Publicado em: 2007
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10. Influência da temperatura e de aditivos na matriz fosfolipídica usada para incorporação de fosfatases alcalinas pela técnica de Langmuir-Blodgett / Influence of the temperature and adtives in phospholipidic matrix utilized to Alkaline Phosphatases incorporation by Langmuir-Blodgett tecnique
ABSTRACT Alkaline phosphatases (AP) are unspecific enzymes that hydrolyze phosphate esthers. In this Dissertation we have studied the adsorption of two forms of AP in phospholipid Langmuir monolayers and Langmuir-Blodgett films, considered as biomembrane models, at different temperatures. Further, the effect of the presence of a disaccharide, trehalose, as w
Publicado em: 2007
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11. Electrochemical studies on inert filler incorporated poly (vinylidene fluoride - hexafluoropropylene) (PVDF - HFP) composite electrolytes
The ionic conductivity, thermal stability and lithium transference number have been investigated in composite polymer electrolytes (CPE) of poly(vinylidene fluoride - hexafluoropropylene) (PVDF-HFP) incorporating nano fillers of AlO[OH]n or gammaAl2O3, with LiClO4 as salt. The compatibility of the composite polymer electrolyte with lithium metal anode has al
Polímeros. Publicado em: 2006-06
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12. Análise do comportamento iônico em sistemas constituídos por micelas aniônicas, zwitteriônicas ou vesículas catiônicas: uma abordagem teórica por aproximação de campo médio / The analysis of ionic properties in anionic and zwitterionic micelles or cationic vesicles systems: a mean field theoretical approach
Membranes and organelles are structures present in biological systems. Such structures are interfaces between electrolytes. Addressing to the description, interpretation and comprehension of the ionic distribution around the structures an attempt is done is this work analyzing experimental results from the investigation of the following systems: 1) SDS micel
Publicado em: 2006