里氏木霉 SBS 45 木聚糖酶对硫酸盐浆的酶促漂白。
Enzymatic bleaching of kraft pulp by xylanase from Aspergillus sydowii SBS 45.
机构信息
School of Biosciences, Mahatma Gandhi University, Kottayam, Kerala India.
出版信息
Indian J Microbiol. 2010 Sep;50(3):332-8. doi: 10.1007/s12088-010-0049-2. Epub 2010 Oct 30.
Crude xylanase from Aspergillus sydowii SBS 45 was tested for enzymatic bleaching of kraft (Decker) pulp. After optimization of three parameters, consistency of pulp, retention time and enzyme dose, considerable increase in the release of UV and visible absorbance spectra of materials and reducing sugars was observed, which clearly indicated the action of xylanase on pulp. Final brightness of pulp was increased from 29.42 to 70.42% and kappa number was reduced from 15.93 to 1.61, when 25 U of xylanase was given with a retention time of 5 h and at a consistency of 10%. When 10 U g(-1) xylanase was given, 14.3% elemental chlorine and 14.3% H(2)O(2) could be reduced and when 25 U g(-1) xylanase was given 14.3% elemental chlorine and 28.6% H (2)O(2) could be reduced thereby retaining the brightness at control level.
从曲霉菌 SBS 45 中提取的粗木聚糖酶被测试用于硫酸盐浆（Decker）的酶法漂白。在优化了三个参数，即纸浆浓度、保留时间和酶剂量之后，观察到材料的紫外和可见光吸收光谱以及还原糖的释放有了相当大的增加，这清楚地表明了木聚糖酶对纸浆的作用。当用 25 U 的木聚糖酶在保留时间为 5 小时、浓度为 10%的条件下处理时，纸浆的最终白度从 29.42%提高到 70.42%，卡伯值从 15.93 降低到 1.61。当用 10 U g(-1) 的木聚糖酶处理时，可以减少 14.3%的元素氯和 14.3%的 H(2)O(2)，而当用 25 U g(-1) 的木聚糖酶处理时，可以减少 14.3%的元素氯和 28.6%的 H (2)O(2)，从而使白度保持在对照水平。
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