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The method of sulfomethylation modification of bayberry tannin extract was investigated.
研究了毛杨梅栲胶的磺甲基化改性方法.
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Method of colloidal titration was adopted to determine tannin content of valonia tannin extract.
用胶体滴定法测定了橡椀栲胶中的单宁含量.
Their combination with tanning agents Cr, Al, HCHO and vegetable tannin extract was also studied.
同时研究了它们与铬 、 铝 、 甲醛和栲胶等鞣剂的结合稳定性及其产生的助鞣作用.
栲胶???
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