Two Aqueous Phases System
Mostrando 1-12 de 28 artigos, teses e dissertações.
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1. Liquid-liquid equilibria in aqueous two-phase ethanol/salt systems at different temperatures and their application to anthocyanins extraction
Abstract Aqueous two-phase systems (ATPS) are formed by mixtures of chemical species that, under certain conditions, separate into two immiscible phases, with water as the major component in global terms and, at lower concentrations, polymers, salts, ionic liquids and alcohols, depending on the system type. Different parameters influence ATPS equilibrium suc
Food Sci. Technol. Publicado em: 16/05/2019
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2. Equilíbrio líquido-líquido de sistemas aquosos constituídos por copolímero tribloco e sal em diferentes temperaturas / Liquid-liquid equilibrium of aqueous systems consisting of triblock copolymer and salt at different temperatures
Phases diagrams of aqueous biphasic systems (ABS) formed by triblock copolymer+salt+H2O were construed at three temperatures: The ABS L64+Na2SO4+H2O and L64+Li2SO4+H2O at 5, 10 and 25 C and ABS L35+Na2CO3+H2O, F68+Na3C6H5O7+H2O, F68+Na2C4H4O6+H2O, F68+Na2CO3+H2O and F68+Na2C4H4O4+H2O at 10, 25 and 40 C. The effect of temperature on the position of the binoda
Publicado em: 2009
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3. Separation of the Cd and Ni from Ni-Cd battery by green method utilizing aqueous two-phase system / Separação de Cd e Ni presentes em bateria de Ni-Cd por um método ambientalmente seguro utilizando sistema aquoso bifásico
This work, was done a revision of what has been done in the area of recycling of Ni-Cd batteries, since the disposal of these materials is regulated in several countries, including Brazil, through the resolution CONAMA no 257, because the potential polluter. The recycling is a solution to the disposal of exhausted Ni-Cd batteries, which can not be done with
Publicado em: 2009
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4. Avaliação e caracterização de sistemas baseados em ponto nuvem visando a remoção de albumina do plasma sanguineo / Evaluation and characterization of cloud point based systems for albumin removal from blood plasma
In this work the partition behavior of albumin was studied, which is found at high concentrations in blood plasma, which interferes in many analytical techniques determinations. The present study evaluated different aqueous two-phase systems, exploiting a phenomenon called of cloud point. These systems employ surfactants under specific experimental condition
Publicado em: 2008
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5. Compósitos cerâmicos porosos de alumina - zircônia para aplicação em sistemas de controle térmico para satélites: obtenção e caracterização / Alumina-zirconia porous ceramic composites for application in satellite thermal control systems: obtaining and characterization
To control the temperature of satellites are used various thermal control heat systems. The Loop Heat pipe (LHP) are being developed at the DEM (Space Mechanic and Control Division) of the INPE (National Institute for Space Research) an apparatus for passive heat control of the satellites components. The main components of the LHP system are: capillary evapo
Publicado em: 2008
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6. Caracterização e purificação da enzima bromelina em sistema de duas fases aquosas PEG/Fosfato / Bromelain enzyme caracterization and purification using two aqueous phases system PEG/Phosphate
The bromelains are proteases from vegetable origin, obtained from several species of Bromeliaceae family, which are found in pineapple s stem and fruit. The bromelains uses are based on its proteolytic activity on food industries and mostly at Brazilian pharmaceutical industry. The bromelains has been documented by its therapeutic effects at all inflammatory
Publicado em: 2007
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7. Center metallic effect on intermolecular interactions of complexes [M(CN)5NO]x- with poly(ethylene oxide) in aqueous two-phase systems / Efeito do centro metálico nas interações intermoleculares dos complexos [M(CN)5NO]x- com o poli(óxido de etileno) em sistemas aquosos bifásicos
In this thesis has been studied the metallic center influences of pentacianonitrosylmetalates, [M(CN)5NO]x-, on the partition coefficient (K), of these complex anions in aqueous two-phase systems (ATPS). The ATPS were obtained by mixing stock aqueous solutions of an inorganic salt (Li2SO4 or Na2SO4) with a stock solution of poly(ethylene oxide) of average mo
Publicado em: 2007
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8. ExtraÃÃo lÃquido-lÃquido da lectina da entrecasca de Crataeva tapia l. utilizando micelas invertidas
The lectins are ubiquitous protein in the nature that reversibly bind to mono, oligo, polysaccharides and glycoconjugates. They do not present catalytic activity and unlike antibodies, are not products of immune reply. The aim of the present work was to evaluate the extraction and back-extraction of a lectin purified by ionic exchange chromatography (CrataBL
Publicado em: 2006
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9. Epidemiology and management of coffee (Coffea arabica L.) diseases under organic farming. / Epidemiologia e manejo de doenÃas do cafeeiro (Coffea arabica L.) sob cultivo orgÃnico
The present work aimed to study coffee diseases on organic crop system. For that, rust and black eye spot disease progress on organic and conventional crop systems were compared. The effect of nutrient sources in the disease management was evaluated and, finally, the effect of plant extracts in the protection of coffees in the organic system was tested. The
Publicado em: 2006
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10. Avaliação do processo de extração de fenilalanina com Adogen 464 pela técnica de membranas líquidas sufartantes.
In this work, the process efficiency of surfactant liquid membranes applied to phenylalanine extraction from synthetic aqueous solutions was evaluated. A study of the effects of relevant parameters on the system behavior was carried out in order to establish appropriate conditions of extraction. The aim was to use these conditions as an experimental basis to
Publicado em: 2006
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11. Bromelain estraction and purification from pineapple economic viability studies / Analise de viabilidade economica de um processo de extração e purificação da bromelina do abacaxi
Brazil is one of the world?s largest producers of pineapples, its production being the third one in the world. To take advantage of the residues from fruit processing, many studies have been conducted to obtain proteolytic enzymes from them. These proteolytic enzymes are extracted mainly from fig (ficine), papaya (papain), and pineapple (bromelain). Bromelai
Publicado em: 2005
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12. Extração e recuperação da bromelina em sistemas de duas fases aquosas PEG4000-POLICAJU
Aqueous two-phase system explores the possibility of solutions of two polymers or one polymer and one salt separating into two immiscible aqueous phases, when certain critical concentrations are exceeded. This work was characterised by the KA W ASE recovery index analysis of the bromelain of pineapple juice, using a pulsed column for three sizes of tie lines
Publicado em: 2004