Through the study on the added amount of NaOH, reaction time and temperature, the optimum production process conditions were determined.

通过对氢氧化钠的加入量、应时间、应温度等生产条件的研究，得出了最佳生产工艺条件。

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This study suggests for the first time that the loss of the activity of the enzyme DDAH-1 leads to reduced NO production and may cause heart and circulatory disease.

这个研究第一次说明ddah - 1酶活性的丧失导致NO产生的减少并且可能导致心脏和循环疾病。

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Secondly, this paper study on distributor's ordering time-market information decision-making issue on the MTO production model.

其次，本文研究了MTO生产模式下分销商基于市场信息的订货时间决策问题。

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