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

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Changes in Chemical Composition of Jujuba Leaf during Growth

성숙기에 따른 대추잎의 화학적 조성의 변화

  • Jin, Qing (Dept. of Food Nutrition, Yeungnam University) ;
  • Park, Jyung-Rewng (Dept. of Food Nutrition, Yeungnam University) ;
  • Kim, Jong-Bae (Dept. of Food Analysis, Institute of Health and Environment) ;
  • Cha, Myung-Hwa (Dept. of Food Nutrition, Yeungnam University)
  • 김청 (영남대학교 식품영양학과) ;
  • 박정륭 (영남대학교 식품영양학과) ;
  • 김종배 (대구광역시 보건환경연구원) ;
  • 차명화 (영남대학교 식품영양학과)
  • Published : 1999.06.01
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Abstract

The seasonal variations of chemical composition of jujuba leaf were studied by analyzing general composition, amino acid composition, fatty acid composition, mineral, phenol, condensed tannin, flavonoid contents. Fresh jujuba leaf contained 4.42~6.31% protein and 4.31~5.71% fat on wet basis. Jujuba leaf was rich in aspartic acid, glutamic acid and leucine, but methionine was a limiting amino acid. Four kinds of free sugar, i.e. glucose, fructose, sucrose and maltose were found in jujuba leaf. The contents of fructose and glucose increased during growth, while the contents of disaccharides, sucrose and maltose, decreased. The main fatty acids of the leaf were palmitic acid, linoleic acid, stearic acid and oleic acid. Jujuba leaf was rich in K, Na and Ca, however, the amounts of Fe, Mn and Cu were low. The contents of Ca and Na increased during growth but the content of Mg decreased. The content of total phenolic compound was 0.83~0.89% and the content of condensed tannin was 0.40~0.45%. Two major flavonoids such as rutin and isoquercitrin were detected and their contents were 103.8~125.2mg/kg and 26.2~40.0mg/kg, respectively.

대추잎의 유용식물자원으로서의 이용가능성을 구명하기 위하여 수확시기별 대추잎의 화학적 조성의 변화를 조사하였다. 대추잎의 단백질 함량은 4.42~6.31%로서 수확시기가 늦어지면서 단백질 함량이 급격히 감소하였고 지방 함량은 4.31~5.71%로서 점차 증가하였다. 대추잎의 아미노산 조성은 aspartic acid가 가장 많았고 다음으로 glutamic acid, leucine순이었으며 methionine이 제한 아미노산이였다. 대추잎에 존재하는 유리당으로는 glucose, fructose, sucrose, maltose 4종류로 나타났으며 sucrose의 함량은 성장후기로 갈수록 급격히 감소하였다. 지방산 조성은 palmitic acid가 40% 정도로 가장 많이 함유되었으며 다음으로 linolenic acid, stearic acid, oleic acid순으로 함유되어 이들 4종의 지방산이 전체 지방산 함량의 약 90%를 차지하였다. 대추잎의 무기질 함량은 K, Na, Ca의 함량이 특히 풍부한 것으로 나타났고, Fe, Mn, Cu의 함량은 아주 낮게 나타났다. 잎의 수확시기가 늦어지면서 Ca, Na 함량은 현저히 증가한 반면 Mg 함량은 감소하였으며 K, Mn, Fe, Zn, Cu의 함량은 변화가 없었다. 페놀성 화합물의 함량은 0.83~0.89%, 축합형 탄닌함량은 0.40~0.45%로서 축합형 탄닌이 총페놀 화합물의 약 50%를 차지하였고 수확시기에 따른 함량 차이는 나타나지 않았다. 대추잎에는 rutin과 isoquercitrin 2종의 flavonoid 성분이 존재하였고 각각의 함량은 103.8~125.2mg/kg, 26.2~40.0 mg/kg으로서 수확시기에 따라 rutin의 함량이 isoquercitrin보다 약 3~4배 정도 높게 나타났다.

Keywords

References

  1. Korean J. Food Sci. Technol. v.18 Post-harvest changes in quality and biochemical components of perilla leaves Hong, Y. P.;Kim, S. Y.;Choi, W. Y.
  2. Korean J. Food Sci. Technol. v.24 Studies on the nutritional components of mugwort, Artemisia mongolica Fischer Shim, Y. J.;Han, Y., S.;Chun, H. J.
  3. Korean J. Food Sci. Technol. v.25 Antioxidant effect of aqueous obtained from green tea Lee, J. W.;Shin, H. S.
  4. Korean J. Food Sci. Technol. v.26 Changes of chemical components in Persimmon leaves during growth for processing Persimmon leaves tea Chung, S. H.;Moon, K. D.;Kim, J. K.;Seong, J. H.;Sohn, T. H.
  5. J. Korean Soc. food Nutr. v.24 Falvonoid analysis from the leaves of Eucommia ulmoides Park, J. C.;Kim, S. H.
  6. Food Science and Industry v.28 Biochemical studies on the anticarcinogenesis of tea polyphenol Lin, J. K.;Juan, I. M.;Chen, Y. L.;Liang, Y. C.;Lin, Y. L.
  7. Kor. J. Pharmacogn. v.25 Antineoplastic effect of extracts from traditional medicinal plants and various plants Hyun, J. W.;Lim, K. H.;Shin, J. E.;Sung, M. S.;Won, Y. J.;Kim, Y. S.;Kang, S. S.;Chang, I. M.;Woo, W. S.;Paik, W. H.;Prak, J. G.
  8. Biochi. Biophys. Acta. v.1127 Tea cathechins decrease micellar solubility and intestinal absorption of cholesterol in rat Ikeda, I.;Inasato, Y.;Sasaki, E.;Nakayama, M.;Nagano, H.;Takeo, Y.;Yayabi, F.;Sugano, M.
  9. Food Science and Industry v.28 Benificial effects of tea in chronic disease prevention Weisburger, J. H.
  10. J. Fd. Hyg. Safety. v.11 The antithrombotic effects of green tea catechins Yun, Y. P.;Kang, W. S.;Lee, M. Y.
  11. Korean J. Food Sci. Technol. v.27 Isolation of 3, 4-dihydroxybenzonic acid with antimicrobial activity from bark of Aralia elata Ma, S. J.;Ko, B. S.;Park, K. H.
  12. Studies on the constituents of the leaves of Zizyphus jujuba MILL. M.S. Thesis Lee, S. K.
  13. Association of official analytical chemists. (13th ed.) AOAC
  14. Determination of carbohydrates (2nd ed.) HPLC in food analysis Macrae, R.
  15. 식품공전 보건복지부
  16. J. Agric. Food Chem. v.26 A critical evaluation of vanillin reaction as an assay for tannin in sorghum grain Price, M. L.;Scoyoc, S. V.;Butler, L. G.
  17. J. Agric. Food Chem. v.44 Identification of isorhamnetin 4'-glucoside in onions Park, Y. K.;Lee, C. Y.
  18. Leaf protein: Its agronomy, proparation, quality and use Pirie, N. W.
  19. J. Sci. Food Agric. v.14 The amino acid composition of leaf proteins Chibnall, A. C.;Ress, M. W.;Lugg, J. W. H.
  20. J. Korean Soc. Food Nutr. v.14 Isolation and characterization of arrowroot leaf proteins Lee, K. S.;Yim, K. Y.;Choi, W. Y.;Oh, M. J.
  21. A study on the changes og the nutritional components in pine leaves and pollen during their growth stage. M.S. Thesis Lee, J. S.
  22. J. Food Sci. v.40 Changes in the relative concentration of fatty acids in stored soybean leaf protein concentrate Betschart, A. A.;Kinsella, J. E.
  23. J. Sci. Food Agric. v.20 Effect of storage and lipid extraction on the properties of leaf protein Buchannan, R. A.
  24. Phenolic compounds in food and their effects on healthⅠ Tannin-protein interaction Hagerman, A. E.;Ho, C. T.;Lee, C. Y.;Huang, M. T.(eds.)
  25. Korean J. Food Sci. Technol. v.26 Some physiological activity of phenolic substances in plant foods Lee, J. H.;Lee, S. R.
  26. Korean J. Food Sci. Technol. v.26 Analysis of phenolic substances content in Korean plant foods Lee, J. H.;Lee, S. R.
  27. Biosci. Biotech. Biochem. v.56 Comparison of the antioxidative activity of some acidphenols: structure-activity relationship Cuvelier, M. E.;Richard, H.;Verset, C.