查询词典 Br

Comparing with the result of methyl iodide in intense laser field, some differences are observed:(1) at the same laser field intensity, the highest charged fragment ion of methyl bromide was Br(superscript 3+), lower than I(superscript 6+) of methyl iodide;(2) the dehydrogenation channel was observed in the multiphoton dissociation or Coulomb explosion of methyl bromide, but was not observed in the case of methyl iodide;(3) HBr(superscript +) was observed, but there was no similar channel in the case of methyl iodide;(4) for methyl bromide, the valid charge distance of Coulomb explosion increases with the product of p and q; while in the case of methyl iodide, the distance remained almost the same;(5) the producing channel of CH(superscript + subscript m)(m=0, 1, 2) is different from the ionization-dissociation of methyl iodide in which the stepwise dissociation of CH3(superscript +) was thought to be the main channel, CH(superscript + subscript m)(m=0, 1, 2) of methyl bromide are mainly from the products of the direct dissociation of the dehydrogenated parent ions instead of the stepwise dissociation of CH3(superscript +).

与碘甲烷在强场中的实验结果对比发现：(1)在相同的激光场强下，碘甲烷电离解离的最高价碎片离子为I(上标 6+)而溴甲烷为Br(上标 3+)；(2)溴甲烷质谱中存在母体离子的脱氢产物CHBr和CHBr(上标 2+)，而对于碘甲烷，没有检测到这些通道，C-I键首先断开；(3)质谱中存在H^79Br和H^81Br，而碘甲烷的电离解离中不存在HI产物；(4)溴甲烷库仑两体爆炸的有效电荷间距随着两碎片电荷乘积的增大而增大，而对于碘甲烷此间距几乎不随电荷乘积变化；(5)CH(m=0， 1， 2)的主要生成通道可能与碘甲烷不同，不是来自CH3的顺序脱氢，而是来自脱氢母体离子的直接解离。

Coordination polymers of dimethyl sulfide: Using P2S5 as deoxygenating agents, three coordination polymers containing dimethyl sulfide, [4(CH3SCH3)3]n (34) and n X = Cl(35, Br(36) have been successfully synthesized.

硫醚类化合物本文首次利用P2S5作为有机物的脱氧剂，在溶剂热条件下，成功地合成3种亚铜甲硫醚配位聚合物[4(CH3SCH3)3]n (34)和n X = Cl(35， Br(36)。

BR contains 248 amino acids which comprise of seven transmembraneα-helixes and have a molecular weight of 26KD.

BR中含有8个色氨酸和11个酪氨酸，具有光驱动质子泵、光循环和光电响应功能。

Moreover, the rate which 8-Br-cGMP was hydrolyzed by phosphodiesterase is much more slowly than that cGMP did.

再者，8-Br-cGMP被磷酸二酯酸水解的速率，比cGMP的要慢得多。

In one previous paper, we report the occurrence of basal-BR isolates in China.

我们以前曾经证明，中国也有basal-BR分离物的发生。

Further study showed that quanta size effect is the reason of ultraviolet absorption and blue shift ofabsorption peak.The prepared nano-ZnO was used in NR-SBR-BR composites, the investigation showed that the vulcanization would be proponed when very small amount of nano-ZnO was added. However, as more nano-ZnO was added and the smaller the particle size was, the shorter the vulcanization time was.

用几种不同粒径的纳米氧化锌取代普通氧化锌，应用于以NR-BR-SBR为基体的橡胶复合材料中，研究了不同粒径的纳米氧化锌对橡胶复合材料硫化时间、常规力学性能、耐老化性能及摩擦磨损性能的影响并与加入普通氧化锌的传统橡胶体系进行了 l厂b文通人学顾＊咐穴生学位沦义摘罗比较。

The study provides the base for using of species and BR proteins resources.

研究为物种资源及BR蛋白资源的进一步利用打下基础。

We are br{others.

我们是 br{其他人。

The SP-gun was meant for cavalry brigades as a support and anti-tank weapon.In April 1932, the Armoured Weapons Construction Bureau of the Army Engineer Research Institute BK Br.

自行火炮被主要作为骑兵旅的支援和反坦克武器来使用。1932年4月，位于华沙的陆军工程研究学院的装甲武器研究局BK Br。

A synthesis method of 2-(2'-hydroxyl-4'-benzoyloxy-phenyl)-2H-benzotriazole and derivatives thereof is provided, and is characterized in that 2-(2', 4'-dihydroxyphenyl)-5-X-2H-benzotriazole and benzoyl chloride are taken as raw materials for reaction in solvent for 1-8 hours under the temperature of 50-140 DEC C with the mole ratio of 1 to 0.95-1.1, wherein, the amount of the solvent is 2 to 20 times that of the 2-(2', 4'-dihydroxyphenyl)-5-X-2H-benzotriazole and X represents H, F, Cl, Br.

一种2-(2′-羟基-4′-苯甲酸基苯基)-2H-苯并三唑及其衍生物的合成方法，其特征是，以2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑和苯甲酰氯为原料，在溶剂中进行反应，反应温度50℃～140℃，反应时间1～8小时，反应原料摩尔比2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑∶苯甲酰氯为1∶0.95～1.1，溶剂用量为2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑重量的2～20倍，其中X代表H、F、Cl、Br，具有反应条件温和、反应收率高和产物纯度高的特点。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。