随着反应时间的延长，有羟基邻位和对位双硝基化以及羟基两个邻位双硝基化产物生成。
Dinitrations occurred at two ortho-positions or both ortho- and para-positions to the hydroxy group with longer reaction time than mononitration.
以双酚a、溴水和过氧化氢为原料，采用非均相催化反应技术合成四溴双酚a的新工艺。
The new preparation process of tetrabromobisphenol - a with bisphenol - a, bromine and hydrogen peroxide as raw materials by a heterogeneous catalyst reaction has been introduced in this paper.
研究了酸度对苯胺与双氰胺加成反应生成苯基双胍的影响。
The effect of acidity on the synthesis of phenylbiguanide from the additive reaction of aniline with dicyandiamide was studied.
介绍了双环戊二烯的反应特性和双环戊二烯不饱和聚酯树脂的合成方法，对双环戊二烯树脂的力学性能及应用等进行了研究。
The reaction characteristics of dicyclopentadiene(DCPD), the synthetic method of UPR based on DCPD, the mechanical performance and the application of this UPR were studied in this paper.
目的探讨单根电极导线心室起搏双腔感知双反应方式起搏器(VDD起搏器)的远期临床使用效果。
Objective to inquire into the forward clinical results of ventricular pacing, dual-chamber sensing, atrial-triggered, and ventricular-inhibited (VDD) Pacemaker in an unipolar lead.
该双极板包括相对该双极板的另一部分偏移的该双极板的一部分，从而暴露出所述反应物沟槽。
The bipolar plate includes one portion of the bipolar plate offset from another portion of the bipolar plate so as to expose the reactant channels.
用三氯氧磷、双酚S与苯酚反应制得化合物双酚S双（二苯基磷酸酯）（BSDP）。
Bisphenol-S bis(diphenyl phosphate)(BSDP) was synthesised by phosphorus oxychloride, bisphenol-S and phenol.
用三氯氧磷、双酚S与苯酚反应制得化合物双酚S双（二苯基磷酸酯）（BSDP）。
Bisphenol-S bis(diphenyl phosphate)(BSDP) was synthesised by phosphorus oxychloride, bisphenol-S and phenol.
应用推荐