查询词典 aryl

In response to TCDD exposure, AhR nuclear translocator forms a heterodimer with the aryl hydrocarbon receptor after the ligand-dependent translocation of AhR to the nucleus, and eventually the complex binds to the xenobiotic response elements, which promote transcription of several specific genes, such as CYP1A1.However, the diverse effects of TCDD could not be simply explained by the AhR pathway.

对於戴奥辛的毒性机制，以往的研究认为与芳香基碳氢化合物受体（arylhydrocarbon receptor－AhR）的活化有关；TCDD 活化了AhR，被活化的AhR 从细胞质转移到细胞核内，在细胞核与另一个蛋白质AhR nuclear translocator形成二聚体，并与DNA 上的xenobiotic regulatory element结合，诱发某些基因（如：CYP1A1）的转译与表现；不过，单从AhR的代谢途径并不能解释所有生物上的毒性现象。

The structures were identified by IR, UV,〓 NMR and element analyses. 2. Free radical 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyloxyl as catalyst, the phase transfer catalyzed method of oxidation eighteen semicarbazides to N-Aryl-2-Phenyl diazenecarboxamide with a solution of potassium ferricyanide in 2N aqueous sodium hydroxide and dichloromethane is described for the first time.

利用2，2，6，6-四甲基-4-羟基-1-哌啶氮氧自由基为相转移催化剂，在饱和铁氰化钾的2N氢氧化钠溶液与二氯甲烷的两相反应液中，催化氧化十八个取代氨基脲得到十八个相应的新型偶氮化合物N，2-二芳基二氮亚烯甲酰胺，均获得了较高的产率。

Generally the catalysts have high activity and good selectivity. At present the coupling reactions of organoborahes with terminal olefins s acid chlorides and aryl halides play an important synthetic approaches in organoborane chemical. The catalysts can be used by many kinds of organometal compounds such as: irons cobalt nickel ruthenium rhodium palladiums titaniums zirconiums tins indium and lithium organic compounds; The achievement has been amazed in preparing of unsaturated or saturated compounds and in synthesizing of natural products bioactive molecules and chiral compounds.

目前，卤代烃与不饱和烃的偶联反应和有机硼试剂与酰卤和卤代烃的偶联反应已成为有机合成的研究热点，此类反应可用铁、钴、镍、钌、铑、钛、锆、锡、铟、锂等多种有机金属化合物来催化，用于形成含饱和或不饱和C-C键的化合物，并已在天然产物、液晶、具有生理活性物质和手性化合物的合成中应用。

The reaction of 3 with aryl aldehyde oximes afforded exclusively the product 4 under the PTC conditions.

在相转移催化条件下，3与芳香醛肟反应得到单一的产物4，与芳香酮肟反应则生成4和5的混合物。

The ten target compounds from alkyl substituent to aryl substituent that have not yet been reported,which was obtained by dehydration, Subsequently treated with sodium nitrite resulting nitroso compounds and then reduced.

本论文以2-羟基-3-萘酸和邻巯基苯胺为原料，通过分子脱水、亚硝化、还原等反应合成了10个不同取代基团的4-苯并噻唑基-[1，2-d]萘并噁唑衍生物，并优化了合成的工艺条件。

Wherein X represents a hydrocarbon group or hiydrocylhy-drocarbon group having 1 to 14 carbon atoms, a represents an integer of 1 to 6,b represents an integer of 1 to 5,R's represent a hydrogen atom,a halogen atom,a hydrocarbon group having 1 to 8 carbon atoms or an aryl,group independently from each other,and n represents an average number which is 1 to 10 and4,4'dihydroxybiphenyl,and having a softening point of not higher than 120℃,and not lower than 60℃.

其中x是一个油气组或hiydrocylhy-油气群有1至14个碳原子， a代表整数1到6，B代表整数1到5，R的是氢原子，卤素原子，烃类组有1至8个碳原子或一个芳，77独立于对方，而n是一个平均这个数字是1至10条和第4，4'dihydroxybiphenyl，并有软化点不高于120℃，不得低于60℃。

Bis-silylhydrides were prepared by nickel-catalyzed olefination of the corresponding aryl dithioacetals with Grignard reagent followed by LAH reduction.

镍催化双硫缩醛化合物与格林纳试剂偶合反应可以方便的得到乙烯基矽基醚，再经由LAH还原反应，得到相对应的矽基氢化合物。

A series of β-vinyl alcohols were synthesized using methyl alkyl ketones or methyl aryl ketones and allyl chloride as starting materials by Grignard reagent method.

以烯丙基氯和甲基酮为原料，通过格氏试剂法合成了-β烯醇化合物，并探讨了各种因素对收率的影响，获得了控制反应过程的最佳参数。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。