The-COOH contents in HA increases, phenolic-OH group decreases and the chemical acidity of acidic functional groups increases when HA is oxidized by nitric acid.
用硝酸氧化能使ha中羧基含量增加，酚羟基减少，酸性功能团活性提高。
Water soluble tetrazolium salts assay showed that the MWCNTs-COOH was less cytotoxic when compared to MWCNTs which demonstrated to be slightly more cytotoxic than MWCNTs-OH.
水溶性四氮唑法检测显示碳纳米管的细胞毒性作用呈现浓度依赖性并与作用时间具有一定关系。
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