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Characteristics of structured lipid prepared by lipase-catalyzed acidolysis of roasted sesame oil and caprylic acid in a bench-scale continuous packed bed reactor

Authors
Kim, Byung HeeAkoh, Casimir C.
Issue Date
Jul-2006
Publisher
American Chemical Society
Citation
Journal of Agricultural and Food Chemistry, v.54, no.14, pp 5132 - 5141
Pages
10
Journal Title
Journal of Agricultural and Food Chemistry
Volume
54
Number
14
Start Page
5132
End Page
5141
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/148573
DOI
10.1021/jf060607k
ISSN
0021-8561
Abstract
Structured lipid (SL) was prepared from roasted sesame oil and caprylic acid ( CA) by Rhizomucor miehei lipase-catalyzed acidolysis in a bench-scale continuous packed bed reactor. Total incorporation and acyl migration of CA in the SL were 42.5 and 3.1 mol %, respectively, and the half-life of the lipase was 19.2 days. The SL displayed different physical and chemical properties, less saturated dark brown color, lower viscosity, lower melting and crystallization temperature ranges, higher melting and crystallization enthalpies, higher smoke point, higher saponification value, and lower iodine value, in comparison to those of unmodified sesame oil. The oxidative stability of purified SL was lower than that of sesame oil. There were no differences in the contents of unsaponifiables including tocopherols and phytosterols. However, total sesame lignans content was decreased in SL due to the loss of sesamol when compared to sesame oil. Most of the 70 volatiles present in roasted sesame oil were removed from SL during short-path distillation of SL. These results indicate that the characteristics of SL are different from those of original sesame oil in several aspects except for the contents of tocopherols and phytosterols.
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Kim, Byung Hee
생활과학대학 (식품영양학과)
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