Preparation of phytosteryl ester and simultaneous enrichment of stearidonic acid via lipase-catalyzed esterification

Nakyung Choi, Hyo Jung Cho, Heejin Kim, Yangha Kim, Hak Ryul Kim, In Hwan Kim

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

The simultaneous synthesis of a phytosteryl ester and enrichment of stearidonic acid (SDA) were performed via a one-step lipase-catalyzed esterification of fatty acids from Ahiflower™ seed oil with phytosterol. A commercial lipase (Lipase OF) from Candida rugosa was employed as a biocatalyst. Three solvents were screened and cyclohexane was selected as a suitable reaction medium. The effects of enzyme loading, temperature, and solvent amount were investigated. The conversion as well as the SDA content were significantly improved by adding molecular sieves after 1 h of reaction. The optimum conditions were the enzyme loading of 10% (based on the total substrate weight), the temperature of 30 °C, and the solvent amount of 4 mL (based on a substrate weight of 2 g), respectively. The maximum conversion and SDA content in the residual fatty acid were 81 mol% and 58 mol%, respectively, under the optimum conditions. The SDA content increased a 3.4-fold from 17 mol% in Ahiflower™ seed oil to 58 mol%.

Original languageEnglish
Pages (from-to)88-94
Number of pages7
JournalProcess Biochemistry
Volume61
DOIs
StatePublished - Oct 2017

Bibliographical note

Funding Information:
This research was supported by Korea University grant (K1605411).

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • Ahiflower™ seed oil
  • Candida rugosa lipase
  • Esterification
  • Phytosterol
  • Phytosteryl ester
  • Stearidonic acid

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