Reversed Micelles
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Neural modeling of bromelain extraction by reversed micelles
Uma micro-coluna com campânulas pulsantes foi utilizada para a extração de bromelina a partir de suco de abacaxi, usando micelas reversas. A solução catiônica micelar foi composta do surfactante BDBAC, do solvente iso-octano e do co-solvente hexanol. Seguindo um planejamento experimental, perturbações foram impostas à coluna de extração com o obje
Brazilian Archives of Biology and Technology. Publicado em: 2010-04
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2. Batch and continuous extraction of bromelain enzyme by reversed micelles
Este trabalho teve como objetivo principal otimizar as condições para extração da bromelina do suco do abacaxi (Ananas comosus) por micelas reversas. A purificação foi feita usando o processo de extração em batelada e contínuo, este último em uma micro-coluna de campânulas pulsantes. A solução micelar catiônica foi preparada com o surfactante B
Brazilian Archives of Biology and Technology. Publicado em: 2009-10
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3. Bromelain extraction process using revesed miceles / Estudo do processo de extração da bromelina por micelas reversas em sistema de descontinuo
Bromelain is a set of proteolitics enzymes found in vegetables of the Bromeliaceae family, from which pineapple is known more. Bromelain has several uses, alI based on its proteolitics activity. There are the necessity to develop new processes for purification and concentration of these composites, the liquid-liquid extraction by reversed micelles reveals as
Publicado em: 2006
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4. Estudo e modelagem do processo de extração da bromelina por micelas reversas em uma coluna de campanulas pulsantes / Study and modeling of bromelian extraction process by reversed micelles in a pulsed cap column
Bromelina é um conjunto de enzimas proteolíticas encontradas nos vegetais da família Bromeliaceae, da qual o abacaxi é o mais conhecido. A bromelina tem diversos usos, todos baseados em sua atividade proteolítica. Com a necessidade de desenvolver novos processos de purificação e concentração desses compostos a extração líquido-líquido por micela
Publicado em: 2006
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5. 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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6. Iron oxide based nanoparticles: synthesis and characterization / Síntese e caracterização de nanopartículas baseadas em óxidos de ferro
Magnetic nanoparticles have importance in several areas of knowledge including physics, chemistry and biology. Obtaining nanomaterials with well defined characteristic and shapes is a great challenge for this area of research. In this work two synthetic processes for the synthesis of the magnetic nanoparticles were developed, in reversed micelles and sol-gel
Publicado em: 2005
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7. Estudo da recuperação da enzima G6PDH, em colunas de campanulas pulsantes, com o uso de micelas reversas / Studies of recovery of G6PDH enzyme, in pulsed caps columns, using reversed micelles
The enzime glucose-6-phosphate dehydrogenase (G6PDH) it can be obtained of animal origin, vegetable or microbial, as in the case of the yeast Saccharomyces cerevisiae. This enzymes presents great importance for the cellular survival once it participates in the regulation of the cycle of the pentosys being responsible for the support of an appropriate level o
Publicado em: 2004
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8. Liquid-liquid extraction by reversed micelles in biotechnological processes
In biotechnology there is a need for new purification and concentration processes for biologically active compounds such as proteins, enzymes, nucleic acids, or cells that combine a high selectivity and biocompatibility with an easy scale-up. A liquid-liquid extraction with a reversed micellar phase might serve these purposes owing to its capacity to solubil
Brazilian Journal of Chemical Engineering. Publicado em: 2000-03
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9. Estudo fisico-quimico do transporte de especies quimicas atraves de membranas liquidas hidrofobicas em tempo real
Transport processes of variated chemical species - potassium ions, amino acids and vitamins - through hidrophobic liquid membranes was studied using BLM (bulk liquid membrane) method. UV - Vis spectroscopy was used in all cases to quantify the tranported species. It was not possible to use univariate calibration in cases of simultaneous transport because the
Publicado em: 2000
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10. Production of inulinase: recovery and scale-up / Obtenção de inulinase: recuperação e ampliação de escala
It has been observed that the production of extracellular inulinase by Candida kefyr DSM 70106 was markedly affected by the rate of oxygen transfer to the medium. The highest inulinase activity (37,5 U.Ml-1) was attained at a KLa value (volumetric coefficient of oxygen transfer) equal to 43 h-1. As such, KLa was chosen as a criterion for scaling-up the biore
Publicado em: 1995
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11. Photosensitized production of hydrogen by hydrogenase in reversed micelles
Hydrogenase (hydrogen:ferricytochrome c3 oxidoreductase, EC 1.12.2.1) from Desulfovibrio vulgaris was encapsulated in reversed micelles with cetyltrimethylammonium bromide as surfactant and a chloroform/octane mixture as solvent. Reducing equivalents for hydrogenase-catalyzed hydrogen production were provided by vectorial photosensitized electron transfer fr
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12. Substitution of amino acids Asp-85, Asp-212, and Arg-82 in bacteriorhodopsin affects the proton release phase of the pump and the pK of the Schiff base.
Photocycle and flash-induced proton release and uptake were investigated for bacteriorhodopsin mutants in which Asp-85 was replaced by Ala, Asn, or Glu; Asp-212 was replaced by Asn or Glu; Asp-115 was replaced by Ala, Asn, or Glu; Asp-96 was replaced by Ala, Asn, or Glu; and Arg-82 was replaced by Ala or Gln in dimyristoylphosphatidylcholine/3-[(3-cholamidop