Pichia Stipitis
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Ethanol production from Dekkera bruxellensis in synthetic media with pentose
Abstract Ethanol is obtained in Brazil from the fermentation of sugarcane, molasses or a mixture of these. Alternatively, it can also be obtained from products composed of cellulose and hemicellulose, called “second generation ethanol - 2G”. The yeast Saccharomyces cerevisiae, commonly applied in industrial ethanol production, is not efficient in the con
Braz. J. Chem. Eng.. Publicado em: 2018-01
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2. New cultive medium for bioconversion of C5 fraction from sugarcane bagasse using rice bran extract
The use of hemicellulosic hydrolysates in bioprocesses requires supplementation as to ensure the best fermentative performance of microorganisms. However, in light of conflicting data in the literature, it is necessary to establish an inexpensive and applicable medium for the development of bioprocesses. This paper evaluates the fermentative performance of S
Braz. J. Microbiol.. Publicado em: 2014-12
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3. Aproveitamento das fraÃÃes hemicelulÃsica e celulÃsica dos resÃduos do processamento do girassol para produÃÃo de bioetanol / Utilization of hemicellulosic and cellulosic fractions of waste from sunflower processing for bioethanol production
The researches on second generation ethanol, produced by agroindustrial wastes, have demanded special attention as a possible solution that can contribute to energy sustainability. Such production is based on lignocellulosic fiber conversion (cellulose and hemicellulose), which generates fermentable sugars that are biotransformed in bioethanol after some spe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
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4. Evaluation of oat hull hemicellulosic hydrolysate fermentability employing Pichia stipitis
Oat hull hemicellulosic hydrolysate obtained by diluted acid hydrolysis was employed as fermentation medium for Pichia stipitis cultivation. A comparison between the use of treated hydrolysate with 1% activated charcoal to reduce the toxic compounds generated during the hydrolysis process and untreated hydrolysate as a control was conducted. In the cultures
Braz. arch. biol. technol.. Publicado em: 2012-10
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5. Ethanol production from xylose by Pichia stipitis NRRL Y-7124 in a stirred tank bioreactor
The ethanol production by Pichia stipitis was evaluated in a stirred tank bioreactor using semi-defined medium containing xylose (90.0 g/l) as the main carbon source. Experimental assays were performed according to a 2² full factorial design to evaluate the influence of aeration (0.25 to 0.75 vvm) and agitation (150 to 250 rpm) conditions on ethanol product
Brazilian Journal of Chemical Engineering. Publicado em: 2011-03
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6. Genetic analysis of D-xylose metabolism by endophytic yeast strains of Rhodotorula graminis and Rhodotorula mucilaginosa
Two novel endophytic yeast strains, WP1 and PTD3, isolated from within the stems of poplar (Populus) trees, were genetically characterized with respect to their xylose metabolism genes. These two strains, belonging to the species Rhodotorula graminis and R. mucilaginosa, respectively, utilize both hexose and pentose sugars, including the common plant pentose
Genetics and Molecular Biology. Publicado em: 2011
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7. Road-killed wild animals: a preservation problem useful for eco-epidemiological studies of pathogens
Road-killed wild animals have been for years used for surveillance of vectors of zoonotic pathogens and may offer new opportunities for eco-epidemiological studies. In the current study, fungal infection was evaluated by PCR and nested-PCR in tissue samples collected from 19 road-killed wild animals. The necropsies were carried out and samples were collected
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2010
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8. Otimização da hidrólise da casca de arroz (Oryza sativa) e avaliação da capacidade de bioconversão deste hidrolisado a etanol e xilitol por leveduras / Rice hull hydrolysis optimization and evaluation of this hydrolysate bioconversion to ethanol and xylitol by yeasts
Os resíduos lignocelulósicos agroindustriais, como a casca de arroz, são fontes abundantes e de baixo custo de celulose e hemicelulose, para produção biotecnológica de compostos de alto valor agregado, como os alcoóis, etanol e xilitol. O presente trabalho teve como objetivo otimizar a hidrólise ácida diluída da casca de arroz, utilizando como ferr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2010
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9. Isolamento e caracterização de leveduras fermentadoras de D-xilose, L-arabinose ou D-celobiose e produtoras de celulases e xilanases associadas à madeira em decomposição
Security of a sustainable energy supply providing alternatives to fossil fuels, and market demands are controlling parameters for developing new energy systems, being bioethanol a part of the solution to this problem. The aims of this study were to isolate, identify and characterize yeasts producing exoenzymes and capable of fermenting xylose, arabinose and/
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2009
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10. Studies on whole cell fluorescence-based screening for epoxide hydrolases and Baeyer-Villiger monoxygenases
Reações de biocatálise foram realizadas em microplacas (200 µL) visando a utilização de substratos fluorogênicos (100 µmol L-1) para prospecção rápida de epóxido hidrolases (EHs) e Baeyer-Villiger monoxigenases (BVMOs) em microrganismos (células inteiras). Um protocolo final foi alcançado para EHs, com a detecção de 3 novas fontes enzimática
Journal of the Brazilian Chemical Society. Publicado em: 2004-12
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11. Estudo quimioenzimatico da sintese de um analogo do residuo N-terminal de nikkomicinas
Nikkomycins belong to a group of nucleoside peptides antibiotics produced by streptomycets. These compounds are potent chitin synthetase inhibitors and they exhibit fungicidal, insecticidal, and acaricidal activities. Our approach began with an asymmetric reduction of ethyl benzoylacetate 37. We evaluate the biocatalytic potential of some brazilian microorga
Publicado em: 2003
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12. Prospecção de antibioticos e biocatalisadores : (haloperoxidases e Baeyer-Villiger monoxigenases) em microrganismos
o presente trabalho foi organizado em 3 partes. A primeira delas compreende a investigação por compostos antimicrobianos em extratos de metabólitos secundários de 15 fungos filamentosos isolados de abelhas (Trigona sp.). A aplicação dos ensaios de bioautografia e concentração inibitória mínima (CIM) à monitorização da atividade biológica result
Publicado em: 2003