Modified larch tannin was prepared by grafting copolymerization and sulfoalkylation, and successfully used as retanning agent, possessing good water solubility and enhanced penetration rate.
利用接枝

磺烷基化的方法对落叶松单宁改性。
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味科普(精选双语) 
探索之旅
建筑探索 
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味科普(精选双语) Have greatly enjoyed all this huge day, sauntering and seeing, steeping in the mountain influences, sketching, noting, pressing flowers, drinking ozone and Tamarack water. Found the white fragrant Washington lily, the finest of all the Sierra lilies.
非常享受这一重要的一天,漫步和观赏,沉浸在山间的影响中,素描,注意,压花,喝臭氧和落叶松水。找到了白色芬芳的华盛顿百合,这是所有塞拉利昂百合中最好的。