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Open AccessArticle

Ultrasonic Pretreatment in Synthesis of Caprylic-Rich Structured Lipids by Lipase-Catalyzed Acidolysis of Corn Oil in Organic System and Its Physicochemical Properties

College of Food Science, Northeast Agricultural University, Changjiang Road, Harbin 150036, China
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Foods 2019, 8(11), 566; https://doi.org/10.3390/foods8110566
Received: 23 September 2019 / Revised: 31 October 2019 / Accepted: 8 November 2019 / Published: 11 November 2019
(This article belongs to the Section Food Physics and (Bio)Chemistry)
The current work was to evaluate the lipase-catalyzed acidolysis of corn oil with caprylic acid (CA) in organic system under bath ultrasonic pretreatment and to analyze the physicochemical properties of structured lipids (SLs). Under optimum conditions (Novozym 40086 lipase, 200 W ultrasound power, 10 min ultrasound pretreatment time, 12% dosage of lipase, Triacylglycerol (TAG)/Free fatty acids (FFA): 1/8, 40 °C for 6 h), a 45.55% CA incorporation was obtained (named SLs-U). The highest CA incorporation was 32.75% for conventional method at reaction time of 10 h (named SLs-N). The predominant TAG types of SLs were MLM (medium-, long- and medium-chain-type TAGs) and MLL (medium-, long- and long-chain-type TAGs). X-ray diffraction analysis revealed that both SLs-U and SLs-N present β form. Differential scanning calorimetry (DSC) analysis showed that both SLs-U and SLs-N show a lower melting and crystallization temperature than corn oil. This study suggested that bath ultrasonic pretreatment can accelerate lipase-catalyzed acidolysis synthesis of MLM structured lipids in an organic system, and two kinds of structured lipids show similar physicochemical properties. View Full-Text
Keywords: acidolysis; lipase; caprylic; corn oil; ultrasonic pretreatment; structured lipids acidolysis; lipase; caprylic; corn oil; ultrasonic pretreatment; structured lipids
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MDPI and ACS Style

Yue, C.; Ben, H.; Wang, J.; Li, T.; Yu, G. Ultrasonic Pretreatment in Synthesis of Caprylic-Rich Structured Lipids by Lipase-Catalyzed Acidolysis of Corn Oil in Organic System and Its Physicochemical Properties. Foods 2019, 8, 566.

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