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纤维素是植物光合作用的主要产物,是地球上最丰富的可再生性能源物质,微生物对它的降解是自然界碳素循环的主要环节。对这个过程的有效利用可望为农业、畜牧业、发酵工业以及化学工业等持续提供廉价原料,对防治环境污染和建立良性生态系统也会发挥重要作用。 作为植物的结构性材料,由β-1,4-糖苷键联结葡萄糖苷构成的纤维素,具有很难被微生物降解的特性,与由α-1,4-糖苷键联结葡萄糖苷组成的淀粉相比,纤维素酶的分子转换率要较淀粉酶低约两个数量级。但是,由β-1,4-糖苷键构成的纤维素寡糖,却较由α-1,4-
Cellulose is the main product of plant photosynthesis, is the most abundant renewable energy material on Earth, and its degradation by microorganisms is the main part of carbon circulation in nature. The effective use of this process is expected to continue to provide cheap raw materials for agriculture, animal husbandry, fermentation industry and chemical industry, and will also play an important role in preventing and controlling environmental pollution and establishing a benign ecosystem. As a structural material of plants, cellulose composed of β-1,4-glucosidic bond glucosidase has characteristics of being hard to be degraded by microorganisms and has the same effect as the starch phase composed of α-1,4-glucosidic bond glucosidase The molecular conversion rate of cellulase is about two orders of magnitude lower than that of amylase. However, cellulose oligosaccharides composed of β-1,4-glucosidic bonds are more effective than α-1,4-