|
1
|
Ye L, Liu X, Shen GH, Li SS, Luo QY, Wu HJ, Chen AJ, Liu XY, Li ML, Pu B, Qin W, Zhang ZQ. Properties comparison between free and immobilized wheat esterase using glass fiber film. Int J Biol Macromol 2018; 125:87-91. [PMID: 30529348 DOI: 10.1016/j.ijbiomac.2018.12.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 11/29/2018] [Accepted: 12/04/2018] [Indexed: 11/26/2022]
Abstract
In this paper, the catalytic performance of non-purified esterase from wheat bran immobilized on glass fibre membrane carrier is established, the immobilization conditions observed were enzyme 1 mL, phosphate buffer 3 mL (pH 7.0), immobilization time 1 h, immobilization temperature 29 °C. After carrier functionalization some characteristics of immobilized enzyme were studied, the results showed that immobilized enzyme presenting improved characteristic than that of free enzyme. The optimum pH for free and immobilized enzymes were found to be 8 and 7, respectively. As for optimum temperature for free and immobilized enzymes were observed to be 30 °C and 40 °C, respectively. When the enzyme was immobilized on glass fibre membranes, its Km increased about 7 times. In addition, storage and thermal stability of the free wheat esterase were increased by as a result of membrane immobilization, after 12 days of storage, the immobilized enzyme still retained about 91.10% of its original activity at 4 °C, indicating a great potential in industrial application.
Collapse
Affiliation(s)
- Lin Ye
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China; Sichuan National Inspection and Testing Co., Ltd., Luzhou, Sichuan 646000, PR China
| | - Xiang Liu
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China; Ya'an Polytechnic College, Ya'an, Sichuan 625000, PR China
| | - Guang-Hui Shen
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - Shan-Shan Li
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - Qing-Ying Luo
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - He-Jun Wu
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - An-Jun Chen
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - Xing-Yan Liu
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - Mei-Liang Li
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - Biao Pu
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - Wen Qin
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China
| | - Zhi-Qing Zhang
- College of Food Science, Sichuan Agricultural University, Ya'an, Sichuan, PR China.
| |
Collapse
|