Pyruvaldehyde was synthesized with acetone or 1, 2 propanediol as starting material respectively.

分别用丙酮和1,2丙二醇做原料合成了丙酮醛。

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Fipronil and chlorpyrifos are dissolved by acetone according to the weight percent of 1-3:4.75 and are emulsified and prepared into the combined fipronil and chlorpyrifos pesticide.

本发明中将氟虫腈、毒死蜱的按重量百分比为1～3∶ 4.75用丙酮溶解并乳化制成组合式氟虫腈、毒死蜱杀虫剂。

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The study shows that blocking oxygen is the effective method to control enzymatic browning. The results are summarized as follows:(1) PPO was extracted from Granny Smith with acetone.

主要研究结果如下：（1）采用丙酮粉沉淀抽滤法从澳洲青苹中提取多酚氧化酶。

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