A well devoid of water is useless.
无
的井没有用途。
A well devoid of water is useless.
无的井没有用途。
The hexadecanol bischloroacetate was synthesized fastly with the technique of microwave irradiation with the anhydrous cupric sulfate as catalyst.
研究了在无硫
铜的催化下,利用微波辐射技术快速合
十六酯的方法及影响反应收率的因素。
Energy-saving ethanol dehydration techniques to produce dehydrated alcohol mainly included four measures as azeotropy distillation, extraction distillation, absorptive process and membrane separation.
摘要节能型醇脱制备无醇的方法主要有4种：共沸精馏法、萃取精馏法、吸附法和膜分离法。
When the complex of anhydrous zinc acetate with 1,5-naphthalene diamine was formed, the anhydrous zinc acetate changed from a bidentate ligand to a unidentate ligand.
在无锌与1,5-萘二胺形配位络合物的过程中，无锌的结构从双齿型转变单齿型。
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