Based on the study of vanillin characteristics, new purification methods are presented.

在分析香兰素性质的基础上提出了新的提纯方法。

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The extraction and purification methods and the chromatographic conditions were studied.

研究了五种磺胺类药物残留的提取、净化和色谱条件。

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Objective To improve output, purification and function of islet cells by optimizing isolation and purification methods.

目的优化胰岛细胞分离纯化的方法，提高胰岛产量、纯度和功能。

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The choice of purification methods and the source of the drug will determine the nature and amount of contaminants in the final medicine. (Nothing is ever 100% pure.) Moreover, protein folding, various kinds of enzymatic modifications and impurities inevitably introduce variation, sometimes with unexpected results.

FORBES: Commentary

As the viruses change color once they've reached impervious bacterial strains, in this case variants on Staphylococcus, they can reveal superbugs within 10 to 12 minutes -- a potentially lifesaving interval when current purification-driven methods can take hours.

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