Lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media
학위논문(석사) - 한국과학기술원 : 생물과학과, 2001.2, [ vi, 35 p. ] The synthesis of conjugated linoleyl ascorbic acid was achieved by lipase-mediated esterification in organic media, using immobilized Candida antartica lipase from Roche. This enzyme was perfectly regioselective. The product was extracted and subject...
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한국과학기술원
2001
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ftkoasas:oai:koasas.kaist.ac.kr:10203/27925 2023-05-15T14:15:31+02:00 Lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media 리파제를 이용한 CLA 함유 아스코르브산의 합성 Park, Ki-Won(박기원) Rhee, Joon-Shick(이준식) 2001 http://hdl.handle.net/10203/27925 http://library.kaist.ac.kr/index.php?TargetPageName=wSrchAllDetailView.php&bibctrlno=165485 eng eng 한국과학기술원 CLA lipase 에스테리피케이션 리파제 esterification 학위논문(석사) - 2001 ftkoasas 2013-12-15T13:49:36Z 학위논문(석사) - 한국과학기술원 : 생물과학과, 2001.2, [ vi, 35 p. ] The synthesis of conjugated linoleyl ascorbic acid was achieved by lipase-mediated esterification in organic media, using immobilized Candida antartica lipase from Roche. This enzyme was perfectly regioselective. The product was extracted and subjected to HPLC. The yield was greatly influenced by the kinds of solvents, reaction temperature, the initial water activity $(a_w)$ and the molar ratio of L-ascorbic acid to conjugated linoleic acid (CLA). Highest conversion of the esterification was obtained with the initial water activity $(a_w)$ 0.43 after 48 hours at 50℃ in 68mmol of the acetone using 50㎎ of enzyme, when molar ratio of L-ascorbic acid to CLA was 1:11. The selected solvent was both easily eliminated and accepted by European Community for use in the manufacture of foods and/or food additives. At that moment, maximum yield was 64.6%. 한국과학기술원 : 생물과학과 Other/Unknown Material antartic* Korea Advanced Institute of Science and Technology: KOASAS - KAIST Open Access Self-Archiving System |
institution |
Open Polar |
collection |
Korea Advanced Institute of Science and Technology: KOASAS - KAIST Open Access Self-Archiving System |
op_collection_id |
ftkoasas |
language |
English |
topic |
CLA lipase 에스테리피케이션 리파제 esterification |
spellingShingle |
CLA lipase 에스테리피케이션 리파제 esterification Park, Ki-Won(박기원) Lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media |
topic_facet |
CLA lipase 에스테리피케이션 리파제 esterification |
description |
학위논문(석사) - 한국과학기술원 : 생물과학과, 2001.2, [ vi, 35 p. ] The synthesis of conjugated linoleyl ascorbic acid was achieved by lipase-mediated esterification in organic media, using immobilized Candida antartica lipase from Roche. This enzyme was perfectly regioselective. The product was extracted and subjected to HPLC. The yield was greatly influenced by the kinds of solvents, reaction temperature, the initial water activity $(a_w)$ and the molar ratio of L-ascorbic acid to conjugated linoleic acid (CLA). Highest conversion of the esterification was obtained with the initial water activity $(a_w)$ 0.43 after 48 hours at 50℃ in 68mmol of the acetone using 50㎎ of enzyme, when molar ratio of L-ascorbic acid to CLA was 1:11. The selected solvent was both easily eliminated and accepted by European Community for use in the manufacture of foods and/or food additives. At that moment, maximum yield was 64.6%. 한국과학기술원 : 생물과학과 |
author2 |
Rhee, Joon-Shick(이준식) |
format |
Other/Unknown Material |
author |
Park, Ki-Won(박기원) |
author_facet |
Park, Ki-Won(박기원) |
author_sort |
Park, Ki-Won(박기원) |
title |
Lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media |
title_short |
Lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media |
title_full |
Lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media |
title_fullStr |
Lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media |
title_full_unstemmed |
Lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media |
title_sort |
lipase-catalyzed synthesis of conjugated linoleyl ascorbic acid in organic media |
publisher |
한국과학기술원 |
publishDate |
2001 |
url |
http://hdl.handle.net/10203/27925 http://library.kaist.ac.kr/index.php?TargetPageName=wSrchAllDetailView.php&bibctrlno=165485 |
genre |
antartic* |
genre_facet |
antartic* |
_version_ |
1766287884941262848 |