Low calorie structured lipid synthesis by catalyzed transesterification

• Main Author: Jang, Young(장영)
• Other Authors: Rhee, Joon-Shick(이준식)
• Format: Other/Unknown Material
• Language: English
• Published: 한국과학기술원 1998
• Subjects: Lipase; Structured lipid; Low calorie; Transesterification; 트랜스에스테리피케이션; 리파제; 구조 지방질; 저 칼로리; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/10203/28563; http://library.kaist.ac.kr/index.php?TargetPageName=wSrchAllDetailView.php&bibctrlno=135370

학위논문(석사) - 한국과학기술원 : 생물과학과, 1998.2, [ vii, 46 p. ] Salatrim is a family of structured triacylglycerols containing at least one short-chain fatty acid and one saturated long-chain fatty acid (predominantly stearic acid) on each glycerol. Salatrim has an apparent caloric availability between 4.7 and 5.1 Kcal/g. It can be also made into either liquid phase or solid phase by changing its fatty acid composition. Salatrim can be used in cookies, crackers, salted snacks, chocolates, dairy products, etc. For the production of Salatrim by enzymatic method, an enzymatic transesterification of triacetin as a source of short-chain fatty acid and stearic acid as a source of long-chain fatty acid was performed. The transesterification reaction was carried out in a solvent-free system. Various commercially-available lipases were screened for their ability to synthesize Salatrim. Novozym 435 from Candida antarctica had higher activity and yield than any other enzymes tested. The open reactor system to the closed reactor system for the production of Salatrim was compared. For the optimization of enzymatic synthesis of Salatrim, The factors which influence the optimal condition of reaction; initial aw of substrate and enzyme, time, amount of enzymes, molar ratio of the substrate (triacetin : stearic acid), temperature, and rpm was investigated. 75% yield of SALATRIM could have been obtained at the condition of 80℃, 400rpm, 3hrs, molar ratio of 1 : 1.4 (triacetin : stearic acid). 한국과학기술원 : 생물과학과