Changes of Amino Acids and Formation Mechanism of Flavor in Cooked Small Shrimps

새우 가열(加熱)중의 아미노산의 변화(變化) 및 향기성분(香氣成分) 생성기구(生成機構)에 관한 연구(硏究)

  • Choi, Sung-Hee (Department of Food and Nutrition, Dongeui University) ;
  • Lee, Byung-Ho (Department of Food and Nutrition, Dongeui University)
  • 최성희 (동의대학교 식품영양학과) ;
  • 이병호 (동의대학교 식품영양학과)
  • Published : 1987.11.30

Abstract

Free and total amino acids of before and after the heating of the small shrimps were analysed quantitatively, in order to confirm the role of amino acids as important precursors of cooked odor components. Differences of free amino acids contents of the three samples were slightly reconized but free amino acids contents of all sample decreased as about half by heating, It seems that decreased amino acids participate In volatile components of the Small Shrimps. (Sergia lucens Hancen, Euphausia Surperba and Euphausia pacifica Hancen). The amino-carbonyl model reaction was carried out, in order to confirm formation mechanism of volatile compounds of the small shrimps during cooking. The model systems constituted by diluted solutions. of glucose and amino acids (proline, taurine and betaine) the most containing in small shrimps. The volatile odor concentrates of model system were obtained by simultaneous distillation and extraction with Nickerson's apparatus. The odor concentrates of model systems(I, III) had not small shrimp-like odor and main compounds were 1,4,5,6-tetrahydro-2-acetopyridine and 2-acetyl pyridine. In model system II, hetero ring nitrogen and sulfur compounds identified in small shrimps were not did.

Keywords