Immobilized Enzymes
Mostrando 13-24 de 109 artigos, teses e dissertações.
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13. Imobilização de α-galactosidase de Aspergillus niger em resina de troca iônica Duolite A-568
Immobilized enzymes provide many advantages when compared to the usage of their free forms. Among these ones, remarkable advantages are the possibility of the biocatalyst reusability, easy separation at the end of the process, its usage in continuous way and the enhancement of its stability. This work was performed aiming the immobilization of the α-gal
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2012
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14. Produção de xilo-oligossacarídeos a partir de lignocelulósicos pré-tratados com xilanases imobilizadas e estabilzadas
Endoxylanase, an important industrial enzyme, cleaves ß-1,4-xylanosidic bounds in xylan chains, main plant hemicellulose component. Xylan can be explored to produce many products, among them xylo-oligosaccharides, XOS, made of xylose monomers (2 to 7 units). XOS are considered to be prebiotic ingredients and can improve humans health. XOS are produced by xy
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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15. Desenvolvimento e aplicação de biorreatores capilares para a triagem de ligantes de Purina Nucleosídeo Fosforilases / Development and application of capillary bioreactors for screening of Purine Nucleoside Phosphorylases ligands
Purine Nucleoside Phosphorylases (PNPs) are key enzymes of the purine salvage pathway, and therefore are considered attractive targets for new drugs search. In this context, the development of effective and selective bioassays for PNP ligands screening is an important task. This work describes the covalent immobilization of human and Schistossoma mansoni PNP
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
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16. Sensores e biossensores baseados em transistores de efeito de campo utilizando filmes automontados nanoestruturados / Sensors and biosensors based on field-effect transistors using nanostructured self-assembled films
Separative extended gate field-effect transistor (SEGFET) device is an alternative to the conventional ion-sensitive field-effect transistor (ISFET). The great advantage of SEGFET refers to its easy processing, i.e., it is limited under only manipulation of the gate electrode, avoiding the conventional microelectronic processes. In this way, ion sensors and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2011
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17. Ação antimicrobiana de enzimas hidrolíticas produzidas por Trichoderma asperellum e imobilizadas em blendas de polímeros biodegradáveis. / Antimicrobial action of hydrolytic enzymes produced for Trichoderma asperellum and immobilized on biodegradable polymer blends.
O trabalho foi conduzido com o objetivo de testar a ação de enzimas hidrolíticas produzidas por Trichoderma asperellum, imobilizadas em filmes biodegradáveis, como agente inibidor do crescimento de microrganismos. A atividade inibitória foi testada sobre Aspergillus niger, Penicillium sp. e Sclerotinia sclerotiorum, microrganismos geralmente relacionado
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/01/2011
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18. Microrganismos e disponibilidade de fósforo (P) nos solos: uma análise crítica.
ABSTRACT: Cerrado soils are extremely old, highly weathered and depleted in essential nutrients, especially P. For this reason, the addition of P fertilizers is mandatory in order to obtain economical yields of annual crops. Soil microorganisms play a key role in the P cycle. The P immobilized in the soil microbial biomass acts as reservoir of this element.
Planaltina. Publicado em: 2011
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19. Estudo da produção de enzimas ligninolíticas por Ceriporiopsis subvermispora / Study of the prodution of ligninolytic enzymes by Ceriporiopsis subvermispora
This work involved the research and definition of the culture conditions that maximize the production of manganese peroxidase (MnP) and laccase (Lac) by C. subvermispora, a white-rot fungus studied in biopulping industrial processes. The study involved submerged or static cultures with immobilized mycelium in polyuretane foam in complex or defined medium, an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/09/2010
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20. Comparative studies of the stability of free and immobilized inulinase from Kluyveromyces marxianus NRRL Y-7571 in aqueous-organic solutions
Enzymes have been extensively used in organic solvents to catalyze a variety of reactions of biological and industrial significance. In this work, the characteristics of free and immobilized inulinase were investigated in buffered solutions of butyl acetate. The influences of the organic solvent content on the optimal temperature and pH, the stabilities to t
Brazilian Journal of Chemical Engineering. Publicado em: 2010-12
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21. Contribuição ao conhecimento químico da flora acreana: Protium hebetatum Daly, Protium heptaphyllum(Aublet) Marchand subsp. ulei (Swat) Daly e Protium heptaphyllum (Aublet) Marchand subsp. heptaphyllum / Contribution to the chemical knowledge of the Acre flora: Protium hebetatum Daly, Protium heptaphyllum (Aublet) Marchand subsp. ulei (Swat) and Daly Protium heptaphyllum (Aublet) Marchand subsp. heptaphyllum
This work presents study phytochemistry of three species of plants of the family Burseraceae: Protium hebetatum Daly (PHB), Protium heptaphyllum (Aublet) Marchand subsp. ulei (Swat) Daly (PHU) and the Protium heptaphyllum (Aublet) Marchand subsp. heptaphyllum (PHH), known, at random, as pitch, pitch-white and almécego. The species were collected in the muni
Publicado em: 2010
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22. Effect of immobilization stress on gene expression of catecholamine biosynthetic enzymes in heart auricles of socially isolated rats
Chronic stress is associated with the development of cardiovascular diseases. The sympathoneural system plays an important role in the regulation of cardiac function both in health and disease. In the present study, the changes in gene expression of the catecholamine biosynthetic enzymes tyrosine hydroxylase (TH), dopamine-β-hydroxylase (DBH) and phenyletha
Brazilian Journal of Medical and Biological Research. Publicado em: 06/11/2009
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23. Bioacetilação de álcoois catalisada por Saccharum officinarum
Lipase-catalysed esterifications of alcohols using immobilized enzyme system from sugar cane (Saccharum officinarum) as biocatalyst afforded the corresponding esters in considerable yields (68-93%). Under optimized conditions, the material was utilized for reactions of acetylation with several advantage. It also investigated the possibility of reuse of immob
Química Nova. Publicado em: 2009
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24. Imobilização de enzimas em suportes cromatográficos: uma ferramenta na busca por substâncias bioativas
The development and characterization of bioreactors or IMER (immobilized enzyme reactors) as research tools are important in the scope of medicinal chemistry and constitute an alternative for the rational development of drugs. This approach does not require highly purified enzymes or a great amount of protein, but increase the enzymatic stability against hea
Química Nova. Publicado em: 2009