Through chromium sour oxidize propyl alcohol system ester law study in sulphuric acid acetic acid system in, proply acetate and proply propanoate form mechanism, and related influencing factor.

通过铬酸氧化丙醇制酯法，研究在硫酸- 乙酸体系中， 乙酸丙酯及丙酸丙酯的形成机理，及相关影响因素。

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The result shows that the bubble is an important factor influencing coal separation, and the variation of its volume fraction is closely related to the variation of density of ADMFB.

结果表明：气泡是影响分选精度的重要因素，其体积分率的变化与床层密度波动密切相关。

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Conlusion Make known NIDDM is the major factor of influencing the hearing, the high frequency hearing change and syndrome-type of TCM is closely related.

结论表明NIDDM是影响听力的主要因素，高频听力变化与中医证型密切相关。

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