查询词典 Br

Br(superscript -) and NO3(superscript -) have a stronger inhibitory effect on the photolytic decoloration of direct sky blue than SO(superscript 2- subscript 4), NO2(superscript -) and Cl(superscript -). The coexistence of two different anions has a synergistic inhibition effect on the photolysis decoloration.

与SO(上标 2-下标 4)、NO2、Cl相比BR和NO3对脱色作用抑制最显著，而且两者能形成协同作用抑制光解脱色。

All 5 most stable hept-C62X2 (X = F, Cl, and Br) halogenated complexes are energetically favorable, and their thermodynamic stability decreases following with the increase of size of addends. The hept-C62F2 complexes are potential targets in experiments with high thermodynamic stability.

加成位置相同时，加成产物的热力学稳定性随着加成原子体积的增大而降低。hept-C62F2具有很强的热力学稳定性，是潜在的实验合成目标。

It was found that some main structural factors influencing the RI of organophosphates are 7 substructures such as ＝CH2,≡C—, aaC—(where "a" refers to a chemical bond in the aromatic ring),＝O, O, Cl and Br, which were related to the molecular skeleton of organophosphates, substituent groups on phenyl ring, and alkyls binding to the bond of P—O.

结果表明，影响不同固定相上OP色谱保留的主要结构因素都是由7个ETSI描述子对应的子结构碎片，即：＝CH2，≡C—， aaC—，＝O，—O—， Cl和Br。其中子结构aaC—，＝O和—O与OP化合物母体骨架密切相关，而＝CH2，≡C—，—Cl和—Br反映支链或取代基的变化。

Brisk brave brigadiers br...

活跃勇敢的准将们挥舞着又宽又亮的大刀、短枪和大棒——这让他们几乎站不稳。

The molecular self-assembly behavior in the solution or at the solid surface for a series of alkylammonium bromides RR〓N(CH〓〓Br has been investigated.

研究了一系列不同链长和不同结构的烷基溴化胺RR〓N(CH〓〓Br的分子自组合规律。

In addition, two control systems of which control system Ⅰand Ⅱ were, respectively, 2-mercaptobenzimidazole and 〓Br〓 stabilized silver colloids were prepared and studied.

另外，制备了两个对照体系Ⅰ和Ⅱ，分别为2-巯基苯并噻唑和〓Br〓稳定的银胶体，并对其进行了研究。

Alkylation of C6D6 with 1-dodecene using Br-ALCl3 as a catalyst was firstly carried out. Molecular structures of products, dodecylbenzene isomers, were analyzed by GC-MS and NMR, and the deuterated atom in the dodecylbenzenes was verified to be connected with 1-carbon of the side chain.

首先进行了Br-AlCl3催化氘代苯与1-十二烯烃的反应，通过GC-MS及NMR分析产物十二烷基苯同分异构体的结构，验证了氘原子与产物侧链1-位碳相连的结论。

The influence of different dispersers and lignin,and different disperser-lignin formulation s on the dispersibility of vat brown BR was studied.

研究了不同的分散剂、木质素以及分散剂间、分散剂与木质素间复配比对还原棕BR扩散性的影响。

He is short of br eath, even when he has not been exe rcising, he is breathless.

他喘气；即使不运动，他也是上气不接下气。

At the time when technology means ever more harmful carbon in the air we br eathe, we need these forests now more than ever.

当技术的发展意味着我们会吸入更多有害气体时，我们比任何时候更需要森林。

The sale of last year is better than intending.

去年的销售额比预计的要好。

Jomo Kenyatta.

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