活化能

Prior to fertilization sperm has to undergo an activation process known as capaciation, leading to the acrosome reaction.

在受精之前精子必须完成一个被称为"获能"的活化过程，最终发生顶体反应。

In addition, the activation energy 〓 for the ET reaction has been evaluated.

本文还计算了该电子转移反应的活化自由能〓。

In addition, the activation free energy △G for the ET reaction has been evaluated.

本文还计算了该电子转移反应的活化自由能△G。

Can you speak to the process of activation and how, you know, it comes about?

你能谈一下活化的过程和它是怎么发生的吗？

We are crossing 20% activation and hope to exceed 50% by the end of the summer.

我们是过路的20%活化，并希望能超过50%；到夏季结束。

32P isotope tracing technique was used in this study,and the results indicated that phosphorus stored or pre-existed in roots would be remobilized in maize under phosphorus deficiency from root cortical cells with lysis to shoot mostly rather than root apex during aerenchyma formation.

Kraus等的试验表明玉米根系从土壤中吸收的32P可在根皮层内保留15 d，之后逐渐减少[2]。这意味着与叶片的情形相似，根内也进行着磷的活化和再运转。当植物处于磷胁迫下时，根系吸收的磷素远不能满足植物各器官生长发

Through experiment, we have found that the combination of naphthol/sodium naphtholate is a high efficient bifunctional catalyst for direct aldol reaction.

通过实验，我们发现并筛选出了一组活性较高的β-萘酚和其钠盐双功能催化剂，该方法不需要预先活化Aldol反应的底物就能直接反应，且反应可在室温进行，条件温和，速度快，收率高达98%。

In fact, BDNF potentiates intracellular Ca~(2+) release presynaptically and BDNF-induced TrkB activation also results in phosphorylation of synapsin I via mitoen activated protein kinase, which increases the number of synaptic vesicles available for release.

事实上，BDNF能促进突触前细胞内Ca~(2+)的释放，TrkB的激活也能通过有丝分裂活化蛋白激酶，引起突触素I的磷酸化，进而增加可释放的突触囊泡的数量。

The results showed that over 500.0 μg/L of Jagged-1/Fc led to the obvious enhancement of the proportion of CD4+CD25+ T cells within the day 4 to 6 of induction, which was abrogated with an anti-Jagged-1/Fc monoclonal antibody. This induction action of Jagged-1/Fc on CD4+CD25+ T cells was also inhibited by the block of a Notch signal pathway with N-[N-(3,5-difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester. The level of IL-4 and IL-10 in the supernatant of T cell culture and their intracellular level were elevated by the induction of Jagged-1/Fc,and the level of TGF-β1 in the supernatant was not altered.

结果显示，超过500.0 μg/L剂量的Jagged-1/Fc使CD4+CD25+ T细胞百分比明显增高，诱导时间需要4～6天，抗Jagged-1单抗能抵消Jagged-1/Fc的诱导作用，用DAPT阻断Notch信号通路的活化也能抑制Jagged-1/Fc的诱导作用，Jagged-1/Fc诱导分化的T细胞培养上清中IL-4和IL-10的水平明显增高，TGF-β1无明显变化，胞内IL-4，IL-10，IL-2和TNF-α的水平也呈增高趋势。

Catechin, thearubigins, and theaflavins of Tibetan tea, and products of their oxidation, degradation and complexity, contain important elements to prevent cancer, and reduce cancer and mutation so as to maintain a strong ability to kill cancer cells. The tea is also noted to prevent forms of carcinogenic nitroso compound, and restrain some enzyme that could activate carcinogen. Tibetan tea is rich in many materials, such ascatechin,β-carotene, vitamin

防癌、抗癌藏茶中茶红素、茶黄素、儿茶素以及其氧化、降解、络合产物都是重要的防癌、抗癌、抗突变的成分，有很强的杀灭癌细胞的作用；对人体致癌性亚硝基化合物的形成具有阻断功效，能抑制某些能活化致癌原的酶系；藏茶富含的多种物质，如儿茶素、β—胡萝卜素、维生素B1、B2、C、E等都有抗癌的作用。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。