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Phaffia rhodozyma 세포파쇄액으로부터 항산화제 Astaxanthin의 미셀 형성을 통한 가용화 및 추출
Solubillzation and Extraction Of Antioxidant Astaxanthin by Micelle Formation from Phaffia rhodozyma Cell Homogenate

김영범   ((주)두산바이오텍  ); 류강   (한양대학교 화학공학과 생물공정연구실UU0001519  ); 임교빈   (수원대학교 화학공학과UU0000815  ); 이은규   (수원대학교 화학공학과UU0000815  );
  • 초록

    Astaxanthin (3,3'-dihydroxy- ${\beta}$ , ${\beta}$ -carotene-4-4'-dione), a natural pigment of pink to red color, is widely distributed in nature particularly in the skin layer of salmonoids and the crust of shrimp, lobster, etc. Recently, it was produced from the yeast culture of Phaffia rhodozyma. Because of its high thermal stability and antioxidant functionality, its applications can be extended into food, cosmetics, and pharmaceutical ingredient beyond the traditional feed additive. Because of its very high lipophilicity, astaxanthin has been extracted traditionally by strong organic solvents such as chloroform, petroleum ether, acetone, etc. In this study, we developed a surfactant-based solubillization system for astaxanthin, and used it to extract astaxanthin from disrupted yeast cells. Among Tween 20, Triton X-100 and SDS, Tween 20 was identified as the most suitable surfactant in terms of extraction capacity and safety. The ethylene oxide group of Tween 20 was identified as the most significant factor to increase the HLB value that determined the extraction capacity. The effects of micelle formation condition, such as the molar ratio of astaxanthin and Tween 20, pH, and ionic strength were also investigated. pH and ionic strength showed no significant effects. The optimal molar ratio between astaxanthin and Tween 20 was 1 : 12. Antioxidant activity of astaxanthin was higher than ${\beta}$ -carotene and ${\alpha}$ -tocopherol. Astaxanthin in the crude extract from the yeast cell was more resistant to air and/or light degradation than pure astaxanthin, probably because of the presence of other carotenoids and lipids.


  • 주제어

    extraction of astaxanthin .   Phaffia rhodozyma .   antioxidant functionality .   micelle .   Tween 20.  

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