And among the three types of walnuts, Eastern Black has the highest amount of Total Phenolics, PPP as well as Juglone in its green rind.Walnut ranks second and Bulaotun has the lowest.

• 在不同品种核桃青皮的多酚类物质中,从总酚含量、单宁含量及胡桃醌含量看,美国黑核桃青皮均最高,其次为普通核桃青皮,不老屯核桃青皮均最少。