Amylases
Mostrando 13-24 de 145 artigos, teses e dissertações.
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13. Application of microbial α-amylase in industry - A review
Amylases are one of the main enzymes used in industry. Such enzymes hydrolyze the starch molecules into polymers composed of glucose units. Amylases have potential application in a wide number of industrial processes such as food, fermentation and pharmaceutical industries. α-Amylases can be obtained from plants, animals and microorganisms. However, enzymes
Brazilian Journal of Microbiology. Publicado em: 2010-12
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14. Partial characterization of amylases of two indigenous Central Amazonian rhizobia strains
A produção e parcial caracterização de extratos brutos de amilase de duas estirpes de rizóbio (R-926 e R-991) foram avaliadas. Para ambas as estirpes, as máximas atividades amilolíticas foram obtidas no início/meio da fase exponencial de crescimento. As amilases rizobiais foram ativas numa variação de pH de 4,5 a 8,5 e temperatura de 30 a 50 ºC. N
Brazilian Archives of Biology and Technology. Publicado em: 2010-02
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15. Structural and regulatory differences in amylase isoenzymes in germinating Brazilian barley cultivars
The amylase electrophoretic patterns of 10 Brazilian brewing-barley varieties with different malting grades and diastatic power were analyzed during the 7-day germination which occurs during the malting process. Intra and inter-variety genetic variability was observed at both the structural and regulatory level. In the first few days after germination all va
Publicado em: 2010
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16. Production and characterization of amylases from Zea mays malt
Neste trabalho as enzimas α e β-amilases foram obtidas de malte de milho e depois foram caracterizadas bioquimicamente. Um estudo da germinação foi feito para obtenção do malte com boa atividade amilásica. A germinação ocorreu em escala laboratorial e a atividade enzimática foi medida diariamente. Um modelo exponencial do tipo A=A0eµt foi ajustado
Brazilian Archives of Biology and Technology. Publicado em: 2009-08
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17. As Enzimas presentes no trato digestivo dos insetos : um alvo susceptível de inibição
Seeds of scarlet runner bean (Phaseolus coccineus L.) were analyzed for -amylase inhibitor (-AI) activity. By using polyclonal antibodies raised against pure a−AI-1 from common bean (Phaseolus vulgaris L.) it was possible to detect the typical -AI polypeptides (Mr 14 -18 kDa) as well as a large polypeptide of Mr 32,000 Da. Differential inhibition curve
Publicado em: 2009
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18. Enzimas de organismos aquÃticos e suas aplicaÃÃes fisiolÃgicas
In the last years, there has been a general increase in human demand for fishery products, followed by a significant increase in the world production of aquatic organisms. The growth of fishery industry generates, as consequence, large amounts of wastes and by-products rich in biomolecules, which are discharged into envioronment. Fishery wastes can be used i
Publicado em: 2009
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19. Caracterização fenotípica e produção de biopolímeros por bactérias isoladas de nódulos de guandu [(Cajanus cajan (L.) Millsp.]. 2009, 166f. / Phenotypic characterization and biopolymers production by bacteria isolated from pigeonpea [Cajanus cajan (L.) Millsp.] root nodules. Seropédica: UFRRJ, 2008. 166p.
The biological nitrogen fixation (BNF) is a natural process carried out by prokaryotes collectively called diazotrophs. Among the diverse microorganisms able to fix the atmospheric nitrogen, stand out those capable of set up mutualistic associations with legume plants in specialized structures called nodules. Thus the search for microorganisms able to establ
Publicado em: 2009
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20. Ação inibitória de extratos de plantas do Cerrado sobre α-amilases com ênfase em Kielmeyera coriacea
α-amylases are digestive enzymes widely distributed in microrganims, plants and animals, that catalyze hidrolysis of α-1,4 glicosidic bonds and act in carbohydrate metabolism. The inhibition of α-amylases can be applied on control of insect pests that depends on starch-rich diet to energy production, reducing the amount of nutrients to avoid i
Publicado em: 2008
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21. Estudo da ação do inibidor de proteinase de Adenanthera pavonina sobre o desenvolvimento e atividade das proteinases intestinais de lagartas de Diatraea suchharalis (FABR., 1794) / Study of proteinase inhibitor action from Adenanthera pavonina on the development and midgut proteinase activities of the Diatraea sachharalis larvae (FABR., 1794)
Phytophatogous insects and other animals use digestive enzymes, such as amylases and proteinases to process the nutrients obtained from the plants necessary for their development. The sugarcane borer Diatraea saccharalis is the major pest of sugarcane in Brazil and other South American countries. Plants synthesize a variety of molecules, including proteinase
Publicado em: 2008
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22. Effects of Aspergillus niger inoculum concentration upon the kinetics of starchy wastewater pretreatment in a tanks-in-series bioreactor under transitory conditions
This paper discusses the effects of three Aspergillus niger inoculum concentrations (0.12, 2.3 and 3.6 g/l) upon the kinetics of starch pretreatment under aerobic and transitory conditions using a tanks-in-series reactor. A synthetic wastewater containing starch as model polysaccharide was fed into the reactor system to study this polymer transformation by A
Brazilian Journal of Chemical Engineering. Publicado em: 2007-12
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23. Response surface methodology to evaluation the recovery of amylases by hollow fiber membrane
Este trabalho objetivou estudar o efeito do pH e da pressão trans-membrana durante a recuperação das enzimas alfa e beta amilases do malte de milho (Zea mays) por membranas de fibras ocas, a obtenção das condições ótimas foi feita por um modelo estatístico, estabelecido pela metodologia de superfície de resposta (RSM). A análise da superfície de
Brazilian Archives of Biology and Technology. Publicado em: 2007-07
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24. Enzimas termoestáveis: fontes, produção e aplicação industrial
REVIEW: Living organisms encountered in hostile environments that are characterized by extreme temperatures rely on novel molecular mechanisms to enhance the thermal stability of their proteins, nucleic acids, lipids and cell membranes. Proteins isolated from thermophilic organisms usually exhibit higher intrinsic thermal stabilities than their counterparts
Química Nova. Publicado em: 2007-02