​Professor Wang Yong's team from Jinan University published research results on LWT-Food Science and Technology

Postdoctoral researcher Zhang Zhen from Professor Wang Yong’s research group from Jinan University College of Science and Technology and graduate student Zhou Haiyan jointly published the title "Acyl-migration occurrence of palm olein during interesterfication catalyzed by sn -1,3 specific lipase" research paper, supervised by Professor Wang Yong and postdoctoral fellow Zhang Zhen and are corresponding authors.

Research Background

Transesterification is an important technical means for the modification of edible oils.

The use of Sn-1,3 specific immobilized lipase to catalyze the transesterification has the advantages of mild reaction conditions and strong specificity, but sn-1,3 specific lipase catalyzes glycerol When the triester is transesterified, there is the phenomenon of acyl migration, which changes the fatty acid composition at the sn-2 position, reduces the specificity of sn-1 and 3 lipase catalysis, and affects the characteristics of the final transesterification product.
In this paper, palm liquid oil is used as the raw material, and the sn-1,3-specific lipase (Lipozyme TL IM) is used as the catalyst.

Research result

The study found that as the acyl mobility of the transesterification process increases, the trisaturated triglyceride content in the palm liquid oil triglyceride increases, the solid fat content at the same temperature increases, the crystal melting temperature increases, and the solid form The sex is enhanced, and the crystallization is more delicate.
At the same time, the influence of different reaction conditions (addition of lipase, reaction temperature, reaction time) on the migration of acyl groups was explored, and it was found that increasing the reaction temperature and prolonging the reaction time would promote the occurrence of acyl migration.

This research was supported by the National Natural Science Foundation of China (32001734), Guangdong Science and Technology Program (2020A1515111153), and China Postdoctoral Science Foundation (2019M663388).

references

Zhou H, Zhang Z, Lee WJ, et al.
Acyl migration occurrence of palm olein during interesterification catalyzed by sn-1, 3 specific lipase[J].
LWT, 2021: 111023.

Original link: elsevier.
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Expert profile:

Professor Wang Yong

Wang Yong, professor/doctoral supervisor.

He is currently the deputy dean of the International College of Jinan University, and concurrently the vice president of the Grease Branch of the Chinese Cereals and Oils Association.
Winner of the National Hundred Excellent Doctoral Dissertations Nomination Award, selected as "New Century Excellent Talents" by the Ministry of Education, Guangdong Province "Thousand Hundred Ten" Support Program, Guangdong Province "Yangfan Plan" to introduce innovative and entrepreneurial teams (leaders) and Jinan University" Outstanding talent".

At the same time, he concurrently serves as the director of the Guangdong Provincial Oil Biorefinery and Nutrition Safety International Joint Research Center, the director of the Guangdong University Oil Biorefinery Engineering Technology Research Center, the director of the Guangdong Grain and Oil By-product Biorefinery Engineering Technology Research Center, and the Guangdong Food By-product Value-added Processing The chairman of the Industrial Technology Innovation Alliance, the Chinese head of the Jinan University-University of Saskatchewan "Oil Biorefinery and Nutrition" Joint Laboratory and the Jinan University-University Putra Malaysia "Oil Processing and Safety" International Joint Laboratory.

Zhang Zhen, Ph.

D.

Zhou Haiyan, female, is a master student at Jinan University.

Her research direction is oil biorefinery and nutrition.

(The article "Acyl migration occurrence of palm olein during interesterification catalyzed by sn-1,3 specific lipase" was published in LWT in February 2021.