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Bioconversion of Lignocellulose Materials

机译:木质纤维素材料的生物转化

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摘要

One of the most economically viable processes for the bioconversion of many lignocellulosic waste is represented by white rot fungi. Phanerochaete chrysosporium is one of the important commercially cultivated fungi which exhibit varying abilities to utilize different lignocellulosic as growth substrate. Examination of the lignocellulolytic enzyme profiles of the two organisms Phanerochaete chrysosporium and Rhizopus stolonifer show this diversity to be reflected in qualitative variation in the major enzymatic determinants (ie cellulase, xylanase, ligninase and etc) required for substrate bioconversion. For example P. chrysosporium which is cultivated on highly lignified substrates such as wood (or) sawdust, produces two extracellular enzymes which have associated with lignin deploymerization. (Mn peroxidase and lignin peroxidase). Conversely Rhizopus stolonifer which prefers high cellulose and low lignin containg substrates produce a family of cellulolytic enzymes including at least cellobiohydrolases and β-glucosidases, but very low level of recognized lignin degrading enzymes.
机译:白腐真菌代表了许多木质纤维素废料生物转化的最经济可行的方法之一。 Phanerochaete chrysosporium是重要的商业栽培真菌之一,其表现出利用不同的木质纤维素作为生长底物的不同能力。对两种生物(Phanerochaete chrysosporium和Rhizopus stolonifer)的木质纤维素分解酶谱的检查表明,这种多样性反映在底物生物转化所需的主要酶决定簇(即纤维素酶,木聚糖酶,木质素酶等)的质量变化中。例如,在高度木质化的底物如木屑(或锯末)上培养的金黄色葡萄球菌产生两种与木质素展开二聚化有关的细胞外酶。 (锰过氧化物酶和木质素过氧化物酶)。相反,优选高纤维素和低木质素含量的底物的根霉会产生纤维素分解酶家族,至少包括纤维二糖水解酶和β-葡萄糖苷酶,但是公认的木质素降解酶水平非常低。

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