Changes in Free Amino Acids of Ark Shell, Anadara broughtonii, during Sun-drying

피조개의 일건(日乾)중 유리아미노산의 변화(變化)

  • Kim, Hong-Jin (Department of Food and Nutrition, Dong-A University) ;
  • Moon, Sook-Im (Department of Food and Nutrition, Dong-Ju Women's Junior College) ;
  • Joh, Yong-Goe (Department of Food and Nutrition, Dong-A University)
  • 김홍진 (동아대학교 식품영양학과) ;
  • 문숙임 (동주여자전문대학 식품영양과) ;
  • 조용계 (동아대학교 식품영양학과)
  • Published : 1985.11.21

Abstract

This study was attempted to check the change of free amino acids in the extractives from ark shell, Anadara broughtonii, during sun-drying. The content of moisture, crude protein and crude lipids of ark shell flesh were 84.7%, 9.6% and 0.8%, respectively. The amounts of extractive-nitrogen from ark shell flesh during sun-drying were 21.18 mg/g in the raw sample, and decreased to 16.25 mg/g after one day sun-drying, and then gradually increased to 31.9 mg/g at the 20th day. The amounts of free amino acid-nitrogen from ark shell flesh during sun-drying were 16.10 mg/g in the raw sample, and decreased to 11.5 mg/g after one day sun-drying and then gradually increased to 17.61 mg/g at the 20th day. In free amino acid composition of raw sample, the most abundent amino acids were glutamic acid (14.1%), histidine (13.8%), arginine(13.7%) and proline (12.1%) in order and taurine was also detected in trace amounts. The amounts of total free amino acids in the extractive from ark shell flesh during sun-drying were 2041.2mg% in the raw sample, and decreased to 1784.0 mg% after one day sun-drying, and then gradually increased to 5277.0 mg% at the 20th day. During sun-drying of ark shell flesh, leucine, isoleucine, valine showed up a increasing tendency, while the amounts of aspartic acid, proline and taurine were decreased.

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