结论：TCRC在不同介质中的累积释放度只在几个时间点有差异，而总的释放度无差异。

CONCLUSIONS: the dissolution of TCRC in above medium were different only in a several time points, but there was no difference in the total cumulative dissolution.

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该方法制备的左氧氟沙星-壳聚糖缓释微球载药量为43.88%，体外累积释放度的线形关系良好。

The drug-loading rate of this chitosan-levofloxacin sustained-release microsphere is 43.88%. Its in vitro dissolubility is good.

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方法用紫外分光光度法和释放度试验，考察头孢克肟缓释片在不同释放介质中不同释放时间的累积释放度。

Methods Ultraviolet spectrophotometry and release test were applied to determine the release of cefixime in cefixime sustained-release tablets under different media and time points.

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