free amino group meaning in Chinese

自由氨基

In this study , it has been put forward that taking reactive nanometer magnetic fe304 particles as magnetic nucleus , and the copolymer of styrene ( st ) ? crylic acid ( aa ) as macromolecular shell , we could synthesize , magnetic polymer composite microspheres containing carboxyl groups on their surface , then microspheres are activated by thionylchloride , the surface of such magnetic composite microspheres thus produced had reactive acid chloride groups which then react with the free amino groups of the free soluble enzymes to give peptide bonds ( ? o ? h ? ,
本研究首次提出了以纳米级磁性fe _ 3o _ 4粒子为核心，苯乙烯( st ) ?丙烯酸( aa )共聚物为高分子壳层，合成了表面带羧基的磁性高分子复合微球，然后将这种微球用二氯亚砜进行活化处理，在其表面形成了反应性酰氯基团，该基团可以与游离酶的氨基形成肽键，从而将游离酶固定化。