Cellulases
Mostrando 13-24 de 145 artigos, teses e dissertações.
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13. BIOPROCESS DEVELOPMENTS FOR CELLULASE PRODUCTION BY Aspergillus oryzae CULTIVATED UNDER SOLID-STATE FERMENTATION
Abstract Bioprocess development studies concerning the production of cellulases are of crucial importance due to the significant impact of these enzymes on the economics of biomass conversion into fuels and chemicals. This work evaluates the effects of solid-state fermentation (SSF) operational conditions on cellulase production by a novel strain of Aspergil
Braz. J. Chem. Eng.. Publicado em: 2016-03
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14. Enzymatic saccharification and fermentation of cellulosic date palm wastes to glucose and lactic acid
Abstract The bioconversion of cellulosic wastes into high-value bio-products by saccharification and fermentation processes is an important step that can reduce the environmental pollution caused by agricultural wastes. In this study, enzymatic saccharification of treated and untreated date palm cellulosic wastes by the cellulases from Geobacillus stearother
Braz. J. Microbiol.. Publicado em: 2016-03
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15. Enhanced alkaline cellulases production by the thermohalophilic Aspergillus terreus AUMC 10138 mutated by physical and chemical mutagens using corn stover as substrate
Abstract A thermohalophilic fungus, Aspergillus terreus AUMC 10138, isolated from the Wadi El-Natrun soda lakes in northern Egypt was exposed successively to gamma and UV-radiation (physical mutagens) and ethyl methan-sulfonate (EMS; chemical mutagen) to enhance alkaline cellulase production under solid state fermentation (SSF) conditions. The effects of dif
Braz. J. Microbiol.. Publicado em: 2015-12
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16. Halotolerant bacteria in the São Paulo Zoo composting process and their hydrolases and bioproducts
Halophilic microorganisms are able to grow in the presence of salt and are also excellent source of enzymes and biotechnological products, such as exopolysaccharides (EPSs) and polyhydroxyalkanoates (PHAs). Salt-tolerant bacteria were screened in the Organic Composting Production Unit (OCPU) of São Paulo Zoological Park Foundation, which processes 4 ton/day
Braz. J. Microbiol.. Publicado em: 2015-06
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17. Production of plant cell wall degrading enzymes by monoculture and co-culture of Aspergillus niger and Aspergillus terreus under SSF of banana peels
Filamentous fungi are considered to be the most important group of microorganisms for the production of plant cell wall degrading enzymes (CWDE), in solid state fermentations. In this study, two fungal strains Aspergillus niger MS23 and Aspergillus terreus MS105 were screened for plant CWDE such as amylase, pectinase, xylanase and cellulases (β-glucosidase,
Braz. J. Microbiol.. Publicado em: 2014-12
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18. Improving the extraction conditions of endoglucanase produced by Aspergillus niger under solid-state fermentation
Production of cellulases under solid-state fermentation (SSF) is a promising technique that can help to reduce costs. Besides optimizing the production process, it is also important to consider enzyme recovery during the extraction step. Here, an experimental design methodology was used to investigate the effects of the operational parameters solid to liquid
Braz. J. Chem. Eng.. Publicado em: 2013-03
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19. Efficient production of lignocellulolytic enzymes xylanase, β-xylosidase, ferulic acid esterase and β-glucosidase by the mutant strain Aspergillus awamori 2B.361 U2/1
The production of xylanase, β-xylosidase, ferulic acid esterase and β-glucosidase by Aspergillus awamori 2B.361 U2/1, a hyper producer of glucoamylase and pectinase, was evaluated using selected conditions regarding nitrogen nutrition. Submerged cultivations were carried out at 30 ºC and 200 rpm in growth media containing 30 g wheat bran/L as main carbon
Braz. J. Microbiol.. Publicado em: 2013
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20. Clonagem e estudos de expressão de enzimas do fungo filamentoso Trichoderma harzianum IOC-3844 envolvidas na degradação de biomassa
The plant biomass is a large-scale available resource and one of its more important applications is the second-generation ethanol production. However, the enzyme cost is one of the biggest barriers for economically viable ethanol from biomass. Therefore, it is important to identify fungal strains that can produce high concentrations of plant biomass-degradin
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/07/2012
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21. Produção de celulases, purificação e caracterização bioquímico-cinética da β-galactosidase produzida por fungo isolado da região amazônica / Production of cellulases, purification and characterization of kinetic biochemical ß-galactosidase produced by fungus isolated from the Amazon.
The selection of cellulase-producing fungi is one of the possible estrategies for obtaining necessary enzymes to hydrolyze the lignocellulosic material of plant biomass and thereby contribute to the viability of cellulosic ethanol production. The aim of this study was achive a screening of isolated fungi from the Amazon region to assess the production of enz
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/2012
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22. Produção e caracterização de proteínas do complexo celulolítico de Trichoderma harzianum e T.reesei, envolvidas na hidrólise enzimática da biomassa / Production and Characterization of proteins from the cellulolytic cocktail of Trichoderma harzianum e T.reesei, involved in enzymatic hydrolysis of biomass.
Celulases têm atraído muito interesse nos últimos anos devido a sua habilidade na bioconversão de material lignocelulolítico em glucose, a qual pode, então, ser convertida a etanol por fermentação. O complexo celulolítico capaz de degradar a celulose consiste de várias enzimas (principalmente celulases e β-glucosidases) e proteínas auxiliador
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/05/2012
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23. Produção de celulases por cultivo em estado sólido e aplicação na hidrólise de bagaço de cana-de-açúcar. / Cellulases production by solid state cultivation and application in the hydrolysis of sugarcane bagasse.
São objetivos deste trabalho: (1) avaliar a produção de celulases pelo fungo termofílico Myceliophthora sp. M77, isolado no âmbito do programa BIOTA-FAPESP, cultivando-o em meios compostos por bagaço de cana-de-açúcar (B) e farelo de trigo (T) ou farelo de soja (S), portanto, cultivos em estado sólido; (2) avaliar a eficácia das enzimas na hidróli
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/04/2012
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24. BioconversÃo de resÃduos agroindustriais por micro-organismos do bioma amazÃnico produtores de enzimas lignocelulolÃticas / Bioconversion of agro-industrial residues by microorganisms from the Amazon biome producers of lignocellulolytic enzymes
A biomassa lignocelulÃsica contÃm altos teores de celulose e outros polissacarÃdeos em sua constituiÃÃo quÃmica, podendo ser hidrolisados em aÃÃcares fermentescÃveis. A geraÃÃo de resÃduos agroindustriais anual tem crescido resultando no acÃmulo de resÃduos que contribuem para a poluiÃÃo do meio ambiente e na perda de materiais que possuem po
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012