食品科学 ›› 2005, Vol. 26 ›› Issue (3): 125-127.

• 工艺技术 • 上一篇    下一篇

固定化酶生产低聚异麦芽糖工艺研究

 吴定, 邹耀洪, 王云, 陈爱英, 姚明兰   

  1. 南京财经大学食品科学与工程学院; 江苏省农产品深加工与品质控制重点实验室; 常熟理工学院生化系; 南京农业大学生命科学院
  • 出版日期:2005-03-15 发布日期:2011-09-19

Technique of Isomaltooligosaccharide Preparation with Immobilizing Enzymes

 WU  Ding, ZOU  Yao-Hong, WANG  Yun, CHEN  Ai-Ying, YAO  Ming-Lan   

  1. 1.College of Food Science and Engineering, Nanjing University of Finance and Economy;2.Department of Biochemistry, Changshu College of Science and Engineer;3.College of Life Science, Nanjing Agricultural University
  • Online:2005-03-15 Published:2011-09-19

摘要: 壳聚糖溶解于20%的盐酸,配成25%的壳聚糖溶液,然后用注射器注射到含15%氢氧化钠和30%甲醇的混合溶液中凝结成2mm左右的中空球形壳聚糖。经4%的戊二醛活化的中空球形壳聚糖分别与α-葡萄糖转苷酶、α-淀粉酶、β-淀粉酶、切枝普鲁兰酶在室温反应2h,4℃静置过夜,制备固定化酶。固定化酶的最适pH值约降低1个单位,最适温度提高约10℃。固定化α-淀粉酶和β-淀粉酶的相对酶活力分别为7.2%和22.3%。四种不同的固定化酶重组构成酶催化反应器,生产低聚异麦芽糖含量达38.9%。

关键词: 低聚异麦芽糖, 固定化酶, 中空壳聚糖

Abstract: The hollow globular chitosan was made by dissolving in 20% HCl first and then injecting 25% chitosan solution into 15% NaOH and 30% CH3OH mixture and coagulating into 2mm hollow globular chitosan. The hollow globular chitosan was treated with 4% gluluraldehyde, then immobilized withα-amylase, β-amylase and Brulan enzyme at 25℃ for 2h, respectively. The best reaction pH of the immobilized enzymes decreased about 1 unit, the reaction temperature of the immobilizing enzymes increased about 10℃.The relative activity of enzyme on the immobilized α-amylase and the immobilized β-amylase became 7.2% and 22.3%, respectively. The content of isomaltooligosaccharide reached 38.9% in the bioreactor.

Key words: isomaltooligosaccharide, immobilizing enzymes, hollow globular chitosan