Xylan
Mostrando 13-24 de 272 artigos, teses e dissertações.
-
13. 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
-
14. Qualidade da madeira de Eucalyptus para a produção de carvão vegetal / Wood quality of Eucalyptus for charcoal production
The present study aimed to determine the properties of wood and charcoal from different clones of Eucalyptus spp. Six clones at 7.5 years old were evaluated and the samples were from a clonal test of a forestry company, located in the city of Lassance, Minas Gerais, Brazil. For wood, basic density, heart/sapwood ratio, morphological analysis of fibers and po
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/02/2012
-
15. Glucose(xylose) isomerase production by Streptomyces sp. CH7 grown on agricultural residues
Streptomyces sp. CH7 was found to efficiently produce glucose(xylose) isomerase when grown on either xylan or agricultural residues. This strain produced a glucose(xylose) isomerase activity of roughly 1.8 U/mg of protein when it was grown in medium containing 1% xylose as a carbon source. Maximal enzymatic activities of about 5 and 3 U/mg were obtained when
Braz. J. Microbiol.. Publicado em: 2012-09
-
16. Induction of xylanase in thermophilic fungi Scytalidium thermophilum and Sporotrichum thermophile
Regulation of xylanase production in two thermophilic fungi Scytalidium thermophilum and Sporotrichum thermophile was investigated. The expression of xylanase was found to be inducible in both the cases. Various carbon sources were tested so as to identify the inducers. Soy flour and oat spelt xylan induced maximum level of xylanase in Scytalidium thermophil
Brazilian Archives of Biology and Technology. Publicado em: 2012-02
-
17. AnÃlise da expressÃo da β-Xilosidade II da bactÃria aquÃtica Caulobacter crescentus e seu papel no aproveitamento de resÃduos agroindustriais. / Analysis of β-Xylosidase II expression of the aquatic bacterium Caulobacter crescentus and its role in the utilization of agro-industrial residues
Materiais lignocelulÃsicos sÃo abundantes em resÃduos agroindustriais e subprodutos da agroindÃstria e podem ser usados para produÃÃo de combustÃveis e outros quÃmicos de interesse comercial. Uma alternativa aos mÃtodos fÃsicos e quÃmicos para bioconversÃo de material lignocelulÃsico à o uso de enzimas produzidas por micro-organismos. A bactÃr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/01/2011
-
18. A simple and efficient diffusion technique for assay of endo β-1,4-xylanase activity
Endo-β-1, 4-xylanases is thought to be of great significance for several industries namely paper, pharmaceuticals, food, feed etc. in addition to better utilization of lignocellulosic biomass. The present investigation was aimed to develop an easy, simple and efficient assay technique for endo-β-1, 4-xylanases secreted by the aerobic fungi. Under the propo
Braz. J. Microbiol.. Publicado em: 2011-12
-
19. Pré-tratamento organossolve do bagaço de cana-deaçúcar para a produção de etanol e obtenção de xilooligômeros
Sugarcane bagasse is an abundant lignocelulosic byproduct, due to the high ethanol production from sugarcane juice, which turns this residue an attractive alternative for obtaining cellulosic ethanol and other products of higher value added. However, the use of bagasse requires a pre-treatment step for better use of its fractions. It was proposed in this stu
Publicado em: 2011
-
20. Biochemical traits useful for the determination of genetic variation in a natural population of Myracrodruon urundeuva.
The objectives of this work were to analyze seeds from 20 trees of aroeira (Myracrodruon urundeuva Fr. All.) of a natural population located in the region of Selvíria, State of Mato Grosso do Sul, Brazil, in order to evaluate their protein, lipid and carbohydrate contents, and to estimate their genetic variation. A completely randomized experimental design
Pesquisa Agropecuária Brasileira. Publicado em: 2011
-
21. Enzimas e bactérias lignocelulolíticas do trato digestivo de larvas de Stenochironomus (Diptera:Chironomidae)
A presença de complexo enzimático lignocelulolítico e/ou de microrganismos no trato digestivo de invertebrados é um indicativo da capacidade desses organismos utilizarem a madeira como fonte de energia. Apesar da participação microbiana em processos digestivos celulósicos em algumas espécies de insetos aquáticos, pouco se sabe sobre a importância d
Publicado em: 2011
-
22. Evaluation of activated vegetal charcoal and vegetal polymer on the detoxification of the sugarcane hemicellulosic hydrolysate for biotechnological production of xylitol / Avaliação do carvão vegetal ativado e polímero vegetal na destoxificação do hidrolisado hemicelulósico de bagaço de cana-de-açúcar para a produção biotecnológica de xilitol
The increasing search for ethanol fuel in order to reduce the dependence and to promote the substitution of fossil fuels will contribute to higher accumulation of sugarcane bagasse in the environment. This biomass that in Brazil is a by-product of the sugar-alcohol mills, although it has been used for the generation of energy in the sugar and alcohol product
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2010
-
23. One-step purification and characterization of cellulase-free xylanase produced by alkalophilic Bacillus subtilis ash
The present study describes the one-step purification and characterization of an extracellular cellulase-free xylanase from a newly isolated alkalophilic and moderately thermophilic strain of Bacillus subtilis ASH. Xylanase was purified to homogeneity by 10.5-fold with ~43% recovery using ion-exchange chromatography through CM-Sephadex C-50. The purified enz
Brazilian Journal of Microbiology. Publicado em: 2010-06
-
24. Análise comparativa entre vários métodos de quantificação de hemiceluloses da madeira de eucalipto
Pulp hemicelluloses can be extracted with NaOH and quantified by colorimetric and gravimetric techniques. However the most usual methods to measure eucalyptus pulp hemicelluloses have been through the pentosan method or through xylan analyses by GC or HPLC techniques. In this study a comparison was made between the more traditional methods and indirect metho
Química Nova. Publicado em: 2010