Weining W, Tang H, Chen Y, Liu J, Yu D, Yang F, Elfalleh W. Chemically modified magnetic immobilized phospholipase A
1 and its application for soybean oil degumming.
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2022;
59:317-326. [PMID:
35068576 PMCID:
PMC8758861 DOI:
10.1007/s13197-021-05017-4]
[Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 01/11/2021] [Accepted: 01/31/2021] [Indexed: 01/03/2023]
Abstract
In this paper, the free Phospholipase A1 (PLA1) was immobilized on a magnetic carrier. The average particle diameter of the magnetic carrier was 97 ± 1.3 nm, and the average particle diameter of the magnetically immobilized PLA1 was 105 nm ± 1.3 nm. The enzyme activity was 1940.5 U/g. The magnetic enzyme was chemically modified with formaldehyde, dextran-aldehyde, and dextran-aldehyde-glycine. The proportions of primary amino groups in the modified magnetic immobilized enzyme PLA1 were 0, 53.5% and 47.3%, respectively. The optimum pH of the enzyme after chemical modification was 6.5. When the system temperature was 60 °C, the magnetically immobilized PLA1 modified with dextran-aldehyde-glycine had the optimal activity and stability. This chemically modified magnetic immobilized PLA1 was applied to soybean oil degumming at 60 °C, 6.5 h (reaction time), and 0.10 mg/kg (enzyme dosage). The phosphorus content in the degummed oil was 9.2 mg/kg. The relative enzyme activity was 77.6% after 7 reuses which would be potentially advantageous for industrial applications.
SUPPLEMENTARY INFORMATION
The online version contains supplementary material available at (10.1007/s13197-021-05017-4).
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