Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (4): 20220699.doi: 10.7503/cjcu20220699

• Physical Chemistry • Previous Articles     Next Articles

Preparation and Characterization of an Inner Flower Gel Microsphere Double-embedded with the Activated-lipase

ZHANG Fan1,2, ZHENG Lanlan1, CAO Hong1(), CHENG Lufeng2(), LI Chun3   

  1. 1.Jiaxing Key Laboratory of Molecular Recognition and Sensing,College of Biological Chemical Sciences and Engineering,Jiaxing University,Jiaxing 314001,China
    2.College of Pharmacy,Xinjiang Medical University,Urumqi 830011,China
    3.Department of Chemical Engineering,Tsing Hua University,Beijing 100084,China
  • Received:2022-11-05 Online:2023-04-10 Published:2023-01-15
  • Contact: CAO Hong, CHENG Lufeng E-mail:chyf_ch@126.com;lewis_clf@163.com
  • Supported by:
    the National Natural Science Foundation of China(21266029);the Natural Science Foundation of Zhejiang Province, China(LY17B060011)

Abstract:

Lipase was first activated to an open conformation(PEG-Lip) by polyethylene glycol(PEG8000), then cocrystallized with Ca3(PO42 into Ca3(PO42@PEG-Lip crystal flowers, and then coated with calcium alginate gel to form a inner flower gel microsphere double-embedded activated-lipase[CA-Gel@Ca3(PO42@PEG-Lip]. The gel microspheres were white and oval-shaped with a diameter of about 2 mm. Characterized by scanning electron microscopy(SEM), energy dispersive spectrometer(EDS), confocal microscopy(CLSM) and fourier transform infrared spectrophotometer(FTIR), the activated lipase was embedded in Ca3(PO42 crystals, and the Ca3(PO42@PEG-Lip crystal flowers were entrapped in mesh pores of calcium alginate gel. Enzymatic properties showed that the heat resistance and the pH stability of CA-Gel@Ca3(PO42@PEG-Lip were enhanced under the protection of double armors compared to free lipase. In the repeated utilization experiment, the rapid recovery of CA-Gel@Ca3(PO42@PEG-Lip could be achieved with an aperture diameter of approximately 0.5 mm filter, and after 10 cycles, the enzyme activity was retained up to 83%, showing the obvious improvement of operational stability and reusability of the lipase. This paper provides a new idea and method for the development and utilization of lipase in food industry.

Key words: Double embedding technique, Activated-lipase, Inner flower gel microsphere, Calcium phosphate crystal, Calcium alginate gel

CLC Number: 

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