苯并

In this paper,the detailed preparation process of gas chromatographic column for separating benzene series was introduced,the optimum column temperature and flow rate of carried gas were selected for separation the mixture of cyclohexane,benzene and toluene,and the column performance has been studied in respects to column efficiency and separating size.

本文主要介绍了气相色谱柱的详细制备过程，并以环已烷、苯和甲苯的混合物的分离为例，选择了最佳的操作条件。同时从柱效率和分离度两方面考察了该色谱柱的柱性能。

Benzene is a solvent and is a known cause of cancer and is associated with leukaemia.

苯是一种溶剂，是一种已知的致癌并引发与白血病之间存在相关。

Similarly, the effects of various factors on the reaction of C14 AOS acid with benzene were also studied.

同样的影响，并讨论了各种因素对反应出酸和苯C14等进行了研究。

Methods Appraised the major technological processes for synthesising the benzocaine.

方法评价了合成苯左卡因的主要合成路线，在较优合成路线的基础上进行了试验研究，在酯化反应阶段进行了工艺改进并优化反应条件。

Methods We used the Kamistad Gel as control manufactured by Germany STADA Pharmaceutical Factory and analyzed the curative effects,paregoric effects and side effects of Benzocaine Paste.

以德国史达德大药厂生产的甘美达凝胶为对照组，对苯佐卡因糊剂的疗效、止痛效果及不良反应进行临床观察，并进行统计学检验。

Anesthetic effects of MS-222, clove oil and benzocaine on American shad Alosa sapidissima fingerlings were studied and two-hour transportations of the shad were conducted at the optimal anesthetic concentration.

研究了MS-222、丁香油、苯唑卡因3种麻醉剂对美洲鲥Alosa sapidissima幼鱼的麻醉效果，并运用该3种麻醉剂的适宜剂量对美洲鲥幼鱼进行了运输试验。

The coking crude benzol hydrogenation process and its catalytic system are discussed, and the domestic application of the hydrogenation process is introduced briefly.

论述了焦化粗苯加氢精制的工艺方法及其催化体系，并简单介绍了国内加氢工艺的应用。

Based on analyzing the generation mechanism and quality characteristics of reclaimed acid from benzol refining and comparing varies kinds of purification methods, the operation easily, the technical process simple extraction method is used to purify the reclaimed acid and the dosage of the extraction agent and extraction power are studied in detail.

对精苯再生酸的生成机理、质量特性进行了分析，通过比较各种再生酸净化方法的优缺点，选用操作简便、工艺简单的再生酸净化方法——萃取法对再生酸进行处理试验，并对萃取剂的用量、萃取能力等进行了详细的研究。

The optimal separating condition of chromatography analysis was: Shimadzu VP-ODS 150mm4.6mm as chromatographic column; acetonitrile/water (12/88,V/V, Contained 1.25mmol/l phosphoric acid) as mobile phase with flow rate of 1.0ml/min. Macroporous ion exchange resins and activated carbon were applied to enrich the trace level impurities and the main impurities was determined by LC-MS and GC-MS.They were : Benzonitrile , 2-Methyl-8-hydroxyquinoline, 2,6-Pyridinediamine , O-ethyloxime Cyclo-hexanone and compound with 220 molecular weight .

采用离子树脂和活性炭吸附富集这些微量的杂质，并通过液质联用和气质联用对杂质进行了定性分析，鉴定了影响290nm吸收的主要杂质为苯甲腈，2甲基-8羟基喹啉，2，6二氨基吡啶，O-乙基环己酮肟和分子量220的物质。

The reaction of benzophenone's excitation and active hydrogen-abstraction is a typical photo-reduction reaction; it has been widely applied to surface photo-grafting and photo-polymerization.

二苯甲酮在紫外光照下激发并夺取活泼氢的反应是一个典型的光还原反应，被广泛应用于表面光接枝及光聚合领域。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。