Eucommia ulmoides gum is a crystalline particle existing in the bark and leaf of Duzhong tree.
2
在杜仲树中杜仲胶以晶体微粒的形式存在，必需用溶剂提取或机械破坏植物组织来获取。
Eucommia ulmoides gum(guttapercha or balata) is a crystalline particle existing in the bark and leaf of Duzhong tree (Eucommia ulmoides Oliv), and to extract E.
3
本文对39个杜仲优树无性系叶片的硝酸还原酶活力进行了测定。
Examines the NR activity of leaves from 39 clones of eucommia plus.
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