Ternary Solution
Mostrando 13-24 de 62 artigos, teses e dissertações.
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13. Desenvolvimento de método eletroanalítico para determinação direta de cobre em biodiesel e monitoramento do metal em biodiesel exposto a condições simuladas de armazenamento
A simple, effective and low cost for copper determination in biodiesel, without decomposition of the sample is presented. The samples of biodiesel were diluted in a hydro-ethanolic solution (containing HCl as supporting electrolyte) generating a homogeneous ternary system (water-ethanol-biodiesel) in which copper was detected directly using potentiometric st
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/09/2011
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14. Multicomponent complex formation between pyrimethamine, cyclodextrins and water-soluble polymers
The combined effect of hydroxypropyl-β-cyclodextrin (HPβCD) and polyvinylpyrrolidone (PVP) or sodium carboxymethylcellulose (CMC) on the solubility of pyrimethamine (PYR) was studied. Equimolar PYR-HPβCD solid systems, in the presence or the absence of 0.25% (w/v) PVP or 0.10% (w/v) CMC were prepared by coevaporation or freeze-drying, and characterized by
Brazilian Archives of Biology and Technology. Publicado em: 2011-10
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15. Corrosion resistance improvement of titanium base alloys
The corrosion resistance of the new Ti-6Al-4V-1Zr alloy in comparison with ternary Ti-6Al-4V alloy in Ringer-Brown solution and artificial Carter-Brugirard saliva of different pH values was studied. In Ringer-Brown solution, the new alloy presented an improvement of all electrochemical parameters due to the alloying with Zr; also, impedance spectra revealed
Química Nova. Publicado em: 2010
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16. Estudo e desenvolvimento de blendas ternárias biodegradáveis a partir de poli(ácido lático), poli(álcool vinílico) e quitosana
The present study examined the use of poly(vinyl alcohol) as a compatibilizing agent between chitosan and PLA and as a diluent for chitosan in an approach where a dispersion chitosan in PVA produced by solution blending these materials are added to PLA in an melting procedure. We investigate ternary mixtures of PLA / PVA / chitosan system both the PVA / chit
Publicado em: 2010
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17. Estudo estrutural e funcional das proteínas PilZ e YaeQ do fitopatógeno Xanthomonas axonopodis pv citri / Structural and functional studies of PilZ and YaeQ from Xanthomonas axonopodis pv citri proteins
The aim of the project was to perform structural and functional studies of different Xanthomonas axonopodis pv citri (Xac) proteins including the hypothetical proteins YaeQ and SufE; RpfC, RpfF and RpfG involved in the quorum sensing and PilZ, FimX and PilB that play roles in type IV pilus (T4P) biogenesis. Several experimental techniques were employed inclu
Publicado em: 2010
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18. Estudo de equilÃbrio de troca iÃnica de sistemas binÃrios e ternÃrios por meio de redes neurais / Ion exchange equilibrium of the binary and ternary systems using neural network and mass action law
In the majority of the applications of the process of ionic exchange in the chemical industry some ionic species are gifts that compete between itself for the active small sieges of the ionic exchanger. Therefore, the project of these systems requires an analysis of the coefficients of selectivity of ions gifts in the solution that determines the influence o
Publicado em: 2009
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19. Adsorção de corantes reativos utilizando sal quartenário de quitosana como adsorvente
Adsorption of reactive dyes orange 16, red 120 and blue 4 by quaternary chitosan salt (QCS) or chitosan-N-2-hydroxypropyl trimethyl ammonium chloride was used as model to demonstrate the removal of reactive dyes from textile effluents. The polymer was characterized by IV, ATG, EDX analysis and amount of quaternary ammonium groups. The adsorption experiments
Publicado em: 2009
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20. Desidratação osmotica e secagem convectiva de maçã : transferencia de massa e alterações de estrutura celular / Osmotic dehydrations and convective drying apple; : mass transfer and cellular structure changes
In this study it was investigated the osmotic dehydration of apples (Fuji variety) followed or not by convective drying with hot air. Concentration profiles were determined for water and solute(s) in samples of apples cut in half and osmotically dehydrated in binary aqueous solutions (30% and 50% sucrose, w/w) and ternary solution (50% sucrose and 10% sodium
Publicado em: 2009
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21. Comportamento de fases de soluções binarias e ternarias de poli(etileno-co-alcool vinilico), poli(metacrilato de metila) e dimetilformamida / Phase behavior of binary and ternary solutions of poly(ethylene-co-vinyl alcohol), poly(methyl methacrylate) and dimethylformamide
In this work blends of poly (ethylene-co-vinyl alcohol) (EVOH), a semicrystalline copolymer which combines hydrophobic and hydrophilic segments and poly (methyl methacrylate) (PMMA), an amorphous and hydrophilic polymer were studied. EVOH blends, with ethylene content ranging from 27 to 44 mol% and PMMA were prepared by casting from solutions in DMF, and by
Publicado em: 2008
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22. Recobrimento de aço inoxidável ABNT 409 empregando filme fino bioativo obtido via sol-gel
In the present study, composites made up of ABNT 409 stainless steel was obtained where films produced according to the sol-gel route were deposited using the immersion method. A film of the binary system SiO2-CaO, and another one of the ternary system SiO2-CaOP2O5, were employed. The structure and properties of these films were characterized through the sca
Publicado em: 2007
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23. Casimir force in confined polymer blends or ternary polymer solutions
This paper is devoted to a review of recent progresses concerning the computation of the Casimir force between two parallel plates delimitating a polymer blend or a ternary polymer solution (with a good solvent). We assume that, close to the consolute point, one or the two polymers of the mixture are strongly attracted by the plates (critical adsorption). Fo
Brazilian Journal of Physics. Publicado em: 2006-12
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24. Application of interval analysis for gibbs and helmholtz free energy global minimization in phase stability analysis
The tangent plane criterion has become important for a correct solution evaluation phase and chemical of equilibrium problem. This method, applicable to single and multiphase systems, is mainly used for a single equation of state modeling all phases involved. The present work is mainly concerned with the application of interval analysis methods for global en
Brazilian Journal of Chemical Engineering. Publicado em: 2006-03