The main existence of transition metals in highest oxidation state complex in crystalloid and alkaline medium and reaction activation center has been reviewed with 63 references.

对晶体和碱性介质中过渡金属超常氧化态配离子的主要存在形式和反应活化中心进行了综述，参考文献63篇。

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The results indicate that acid and alkali catalysts can increase the tar cracking reaction speed and reduce the activation energy due to the activated center.

结果表明，酸性和碱性催化剂由于活性中心的存在，加快了反应速度和降低了反应活化能。

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The number of active center and the apparent activation energy and the propagation activation energy of butadiene …

测得了丁二烯在本体系中聚合的表观与增长活化能以及活性中心数目。

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Decreased Fos in the amygdala, the brain's emotional processing center, suggests the olfactory signals suppressed amygdala activation, and possibly fear, researchers said.

WSJ: Why Children Have More Control of Their Dreams

We have both been involved in these initiatives, offering modest cooperative activities, such as activation of a joint early-warning center, and projects that would be more technically, and politically, challenging.

CENTERFORSECURITYPOLICY: Moscow's missile gambit