Comparative analysis of 10 walnuts and their oil quality in Dechang county, Liangshan prefecture, Sichuan province
  
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KeyWord:walnut  walnut oil  crude fat  fatty acid composition
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YANG Junjie1, LIU Wenlong 1, ZOU Qiang1, WEN Yongping1, WU Wanbo2, HUANG Yi1, HE Jingrong1, WANG Yanchun1 1.Key Laboratory for Meat Processing of Sichuan Province, Chengdu University, Chengdu 610106, China 2.Sichuan Academy of Forestry, Chengdu 610084, China 
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Abstract:
      For the rational development and utilization of walnut resources in Dechang county, Liangshan prefecture, Sichuan province, 10 walnuts and their oil quality in Dechang county were compared and analyzed. The horizontal diameter, average fruit weight and kernel rate of walnut, moisture content and crude fat content, and oil yield of walnut kernel, acid value, peroxide value and fatty acid composition of walnut oil were determined. The results showed that the average fruit weight, horizontal diameter and kernel rate of 10 walnuts was 7.76-17.03 g, 29.60-48.17 mm and 40.76%-57.39% respectively; the moisture content of walnut kernel was all less than 5%; the crude fat content of walnut kernel was 57.54%-69.26%; the peroxide value and acid value met the requirements of the national standard; the fatty acid composition was mostly unsaturated fatty acid, and the contents of palmitic acid, stearic acid, oleic acid, linoleic acid and α-linolenic acid were 5.25%-5.93%, 2.17%-3.85%, 27.32%-44.50%, 42.22%-57.13% and 4.43%-6.44% respectively. Considering all factors, Dechang 37, Dechang 7 and Dechang 11 are more suitable for processing and producing walnut oil.
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