Analysis of the Lipid Components in Chestnut (Castanea crenata) -Part I. Composition of lipid fraction of inner and outer part of chestnut-

밤 지질(脂質) 성분(成分)의 분석(分析) -제1보. 내과육(內果肉) 및 외과육(外果肉)의 지질조성(脂質組成)-

  • Rhee, Chong-Ouk (Department of Food Science & Technology, College of Agriculture, Chon-nam National University) ;
  • Kim, Ze-Uook (Department of Food Technology, College of Agriculture, Seoul National University)
  • 이종욱 (전남대학교 농과대학 식품가공학과) ;
  • 김재욱 (서울대학교 농과대학 식품공학과)
  • Published : 1982.12.31

Abstract

Free and bound lipids of both inner and outer part in the edible portion of 3 varieties of chestnuts(Castanea crenata) were extracted and fractionated into neutral lipid, glycolipid and phospholipid, by silicic acid column chromatography. Fatty acid composition of each fraction was examined with gas chromatography. Lipid contents in chestnut on dry weight basis were 1.84% in inner part(1.26%-free lipid and 0. 58% bound lipid) and 1.95% in outer part (1.63%-free lipid and 0.32%-bound lipid). Free lipid content was $2{\sim}5$ times higher than bound lipid content and was more abundant in the outer part. Neutral lipid content of the free lipid in the inner part was 39.5%, approximately 10 times as much as that of the bound lipid, but in the outer part, the former was 56.6%. Glycolipid content was 22. 0% in the free lipid and 17.0% in the bound lipid. Phospholipid content was 6.9% in the free lipid and 10.5% in the bound lipid. The predominant fatty acids were linoleic acid, palmitic acid and linolenic acid in the free lipid, and palmitic acid, linoleic arid and linolenic acid in the bound lipid, Therefore, saturated fatty acid content in the bound lipid was 2 times higher than in the free lipid.

은기(銀寄), 녹조(鹿鳥), 상피(霜被)의 3가지 밤 품종(品種)을 시료(試料)로 하여 과육(果肉)을 내과육(內果肉)과 외과육(外果肉)으로 나눈 후에 유리지질(遊離脂質) 및 결합지질(結合脂質)을 추출(抽出) 하고 그의 지질조성(脂質組成) 및 구성지방산(構成脂肪酸)을 column chromatography, gas chromatography에 의하여 분리(分離), 정량(定量)하였다. 밤의 총지질(總脂質)의 평균함량(고형물당(固刑物當))은 내과육(內果肉)에 1.84%, 외과육(外果肉)에 1.95%였으며 이 중에서 유리지질(遊離脂質)은 내과육(內果肉)에 1.26%, 외과육(外果肉)에 1.63%이나 결합지질(結合脂質)은 내과육(內果肉)에 0.58%, 외과육(外果肉)에 0.32%로서 유리지질이 결합 지질보다 $2{\sim}5$배 많았으며 외과육(外果肉)에 특히 유리지질이 많았다. 유리지질(遊離脂質) 중의 중성지질(中性脂質)은 평균 39.5%로 결합지질(結合脂質)의 4%보다 10배 정도 많았으나 외과육(外果肉)에 있어서는 유리지질(遊離脂質) 중의 중성지질이 56.6%로서 더욱 많았다. 당지질(糖脂質)의 평균함량은 유리지질에 22.0%, 결합지질에 17.0%였으며 인지질(燐脂質)의 평균함량은 유리지질에는 6.9%였으나 결합지질에는 10.5%로써 그 함량(含量)이 많았다. 밤의 유리지질(遊離脂質)을 구성하는 주요 지방산은 linoleic acid, palmitic acid 및 linolenic acid이나 결합지질(結合脂質)에는 palmitic acid가 40.1%로 가장 많았고 linoleic acid, linolenic acid가 그 다음으로 적었다. 또한 결합지질에는 포화지방산(飽和脂肪酸)이 유리지질에서 보다 2배 정도 많았다.

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