The Korean Journal of Food And Nutrition (한국식품영양학회지)

The Korean Society of Food and Nutrition (한국식품영양학회)
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Studies on the Physicochemical Characteristics and NDMA Formation of Orostachys japonicus A. Berger

와송의 이화학적 특성 및 NDMA 생성에 관한 연구

  • Choi, Sun-Young (Dept. of Home Economics Education, Education Research Institute, Gyeongsang National University) ;
  • Kim, Jeong-Gyun (Dept. of Marine Bioscience. Gyeongsang National University) ;
  • Sung, Nak-Ju (Dept. of Food Science and Nutrition, Institute of Agriculture and Life Sciences, Gyeongsang National University)
  • 최선영 (경상대학교 가정교육과 교육연구원) ;
  • 김정균 (경상대학교 해양생물이용학부) ;
  • 성낙주 (경상대학교 식품영양학과 농업생명과학연구원)
  • Published : 2008.06.30
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Abstract

The purpose of this study was to analyze the changes in physicochemical characteristics and NDMA formation of Orostachys japonicus A. Berger according to harvest times. The results showed moisture, carbohydrate, crude fiber and crude protein contents of <$48.5{\pm}1.4%$, $38.2{\pm}1.2%$, $l5.8{\pm}0.4%$ and $13.2{\pm}0.6%$ respectively. The total mineral content was 4,817.1 mg/100 g, where Ca was highest($2,577.0{\pm}3.2$ mg/100 g), followed by K, Mg, Na, P and Fe. The composition amino acid of O. japonicus A. Berger showed high levels of glutamic acid and aspartic acid. And among the five free sugars detected, galactose and glucose were most abundant at $32.2{\pm}0.02$ mg/100 g and $25.3{\pm}0.1O$ mg/100 g, respectively. Upon comparing O. japonicus A. Berger extracts that came from plants harvested during $August{\sim}October$, total phenolic compound($2,703.l{\pm}5.2l{\sim}2,428.0{\pm}3.52$ mg/100 g) and flavonoid($634.2{\pm}2.33{\sim}1,324.6{\pm}1.87$ mg/100 g) contents were higher in the methanol extract than in the water extract. Also, within a reaction system, nitrite scavenging ability and NDMA inhibition were most effective at pH 2.5, and increased in proportion to the extract concentration. Finally, the methanol extract of O. japonicus A Berger harvested during $August{\sim}October$ had the highest nitrite scavenging and NDMA inhibition effects.

Keywords

References

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