方法A群脑膜炎球菌多糖经溴化氰活化后共价接上己二酰肼手臂，在碳二亚胺催化下与精制破伤风类毒素（TT）偶联制备结合物。
Methods Conjugate was prepared by carbodiimide mediated coupling of adipic acid hydrazide derivatives of capsular polysaccharides of group A meningococcal with tetanus toxoid(TT).
本文对二苯碳酰二肼分光光度法测定地表水及工业废水中六价铬的样品预处理方法提出了改进措施。
In this paper, the preparatory treatment for determination of Cr6+ in ground water or industrial effluents by the method of spectrophotometry has been improved.
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