Significant difference exists between attacked trees and control trees in oleoresin flow in mason pine but not in exotic pines.
而湿地松和火炬松松脂总流量在受害植株和未受害植株间没有显著差异。
The primary biomass used for surfactant production usually is as follows: cellulose, lignin, starch, chitin, oil and fat and pine oleoresin(an exudate of pine trees) and so on.
开发表面活性剂的生物质资源有纤维素、木质素、淀粉、甲壳素、油脂和松脂等。
A light colour 422 resin with high softening point and reasonable acid value was synthesized directly from pine oleoresin.
以松脂为原料直接合成一种色泽浅、软化点高、酸值合格的4 2 2树脂。
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