FOOD SCIENCE ›› 2006, Vol. 27 ›› Issue (5): 95-97.

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Study on Effect of Polyphenols on Astringency Quality of Walnut Kernel

 WANG  Ke-Jian, QI  Jian-Xun, HU  Xiao-Song,   Hao-Yan-Bin   

  1. 1.Institute of Forestry and Pomology, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China;2.College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
  • Online:2006-05-15 Published:2011-09-16

Abstract: The effect of polyphenols on the edible quality of walnut kernel was studied in this paper. The result showed that the walnut kernel astringency was closely correlated with the protein precipitation capacity (PPC) of polyphenols in the unit weight walnut kernel for different walnut cultivars. The walnut kernel shows a pleasant taste with the PPC value from 610.19 to 489.27(mg/100g). The Juglans regia L in Northern China has more polyphenols with testa color darker than the Juglans sigillata Dodes’ in southern China.

Key words: walnut kernel, polyphenols, edible quality