活性种就是引发剂引发单体后形成的单体自由基或离子，以此为中心进一步链增长，形成高分子链。在自由基聚合中，活性种是单体自由基，在阳离子聚合中的单体阳离子，阴离子聚合中是单体阴离子。
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双语例句原声例句
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实验结果表明所研制聚合物支载硼、钌络合物催化性能明显优于对应非支载活性种。
Experimental results showed that the behaviour of both polymer supported boron and ruthenium catalysts are superior to their unsupported correspondents.
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That's one of the beauties of proteins as working molecules is that their structure can be changed by subtle means.
蛋白质作为一种生物活性分子,其优势之一是,能够通过精细的方法改变其结构
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It generates a kinase activity which leads to phosphorylation of the protein.
它产生了一种激酶活性,导致了受体蛋白的磷酸化
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There are more than 20 amino acids that make up the biological polymers called proteins, so there are 20 choices of each amino acid at a position on a protein.
而那些称为蛋白质的生物活性多聚体,是由二十种不同氨基酸所构成,因此每个蛋白质的,任意位点都有多达二十种氨基酸可供选择
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