Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Physicochemical Quality Comparison of Commercial Doenjang and Traditional Green Tea Doenjang

전통식 녹차된장과 일부 시판된장의 이화학적 특성

  • 정복미 (여수대학교 식품영양학과) ;
  • 노승배 (양사대학 식품가공제과제빵과)
  • Published : 2004.01.01
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Abstract

This study was peformed in order to compare general components, color, free amino acid, fatty acid and organic acid contents between commercial doenjang (C-1, C-2, C-3) and green tea doenjang (GT). The moisture content in green tea doenjang was higher than that in commercial doenjang, but the contents of crude protein, carbohydrate and energy in commercial doenjang were higher than those in green tea doenjang. The crude lipid and fiber contents of commercial doenjang were similar to green tea doenjang. Catechin content of green tea doenjang was 2.3%. The total content of free amino acids in commercial doenjang ranged from 2,739∼6,380 mg% in which it showed wide variation among samples and the total content of free amino acids in green tea doenjang was 3000 mg%. Glutamic acid was almost high in commercial doenjang except one product but green tea doenjang was low. Linoleic acid (51%) was the highest content among the fatty acids. The major organic acid in both commercial and green tea doenjang was oxalic acid and its content in commercial times higher than in green tea doenjang. The antioxidant activity of green tea doenjang was higher than that of commercial doenjang.

본 연구는 일반 시판된장과 녹차된장의 일반성분, 유리아미노산, 지방산, 유기산의 함량과 항산화 활성도를 비교하였으며, 그 결과는 다음과 같다. 수분함량은 일반된장에 비해 녹차된장이 높게 나타났으며, 조 단백 함량은 일반된장에 비해 녹차된장이 낮게 나타났다. 조 지방 함량의 경우 일반된장과 녹차된장이 비슷하게 나타났으며, 회분함량은 녹차된장이 일반된장의 평균값을 나타냈고, 당질 함량은 녹차된장이 가장 낮게 나타났다. 섬유소함량은 일반 시판 된장 중 H제품을 제외하고는 비슷하게 나타났으며, 열량 역시 녹차된장이 가장 낮았다. 녹차된장의 색도는 일반된장에 비해 비교적 낮게 나타났다. 녹차된장중의 총 카테킨 함량은 2.3%로 나타났다. 유리 아미노산의 경우 시판된장 중 C사 제품은 sarcosine이 337.8 mg%로 가장 많은 함량을 나타냈고, 다음으로 proline(268.4 mg%), glutamic acid(268.0 mg%)순으로 나타났으며, H사 제품은 glutamic acid가 831.6 mg%로 가장 높았고, leucine(491.0 mg%), phenylalanine(364.3 mg%)순이었고, S사 제품은 역시 glutamic acid(855.2 mg%)가 시료중에서 가장 높게 나타났으며, 다음으로 alanine(567.9 mg%), phenylalanine(413.9 mg%), valine(400.3 mg%) 순이었다. 녹차된장 역시 glutamic acid(326.24 mg%)가 가장 많이 함유되었고, 다음으로 proline(320.9 mg%), leucine(221.49 mg%)순으로 나타났다. 포화지방산은 녹차된장이 일반된장에 비해 약간 높았으며, 불포화지방산중 단일 불포화지방산은 일반된장에 비해 녹차된장이 약간 낮았고, 다 불포화지방산은 녹차된장이 일반된장의 가장 낮은 값과 비슷하게 나타났다. 총 지방산중에 linoleic acid(51%)가 가장 높게 나타났으며, 다음으로 oleic acid(21∼24%), palmitic acid(10∼11%), stearic acid(3∼4%) 순으로 나타났다 된장의 유기산은 주된 유기산이 oxalic acid였으며, lactic, succinic acid를 제외하고는 대체로 일반 시판된장이 녹차된장에 비해 1.6∼2.7배 높게 나타났다. 녹차된장의 항산화 활성도는 타 일반된장에 비하여 높게 나타났다. 본 연구결과 기능성을 가진 녹차된장이 일반시판된장에 비해 열량이 낮으며, 항산화 활성도가 높으므로 장기간 섭취시 비만예방 및 노화방지에 효과가 있을 것으로 사료된다.

Keywords

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