In hydrolysis of lignocellulosic materials, a lot of compounds which are inhibitory to microorganisms can be formed such as: weak acids, furan derivatives, and phenolic compounds.

在纤维素稀酸水解发酵制乙醇的过程中，由于弱酸、呋喃衍生物和苯系化合物对微生物的影响，乙醇的产量和产率都不高。

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Methods Chalcone derivatives were synthesized from benzaldehyde derivatives and acetophenone by using weak alkali potassium carbonate as based catalyst in water via phase - transfer catalysis.

方法以苯甲醛衍生物和苯乙酮为原料，弱碱碳酸钾为催化剂，水为溶剂，用相转移催化法合成查耳酮衍生物。

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Finally, under suitable assumptions, we obtain the upper semicontinuity and the lower semicontinuity of second-order adjacent derivatives for the weak perturbation maps.

最后，在恰当的假设条件下，获得了弱扰动映射的二阶邻接导数的上半连续和下半连续性。

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