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8Ps for native and NaBH〓 chemically modified reaction centers, and the transfer process from H〓 to the final electron acceptor Q〓 occurs in about hundreds of picoseconds. On the other hand, the energy transfer from excited B was obviously slowed down in the pheophytin-exchanged RC. By considering the change of free energy of ion pair P〓Phe〓, it could be expected there might exist alternative pathway of charge separation and electron transfer in pigment-exchanged reaction center. In addition, the influence of acid environment on the ultrafast dynamics of reaction center was also experimentally observed, which shows an evident difference from that of in native RC, and further investigation should be carried out to elucidate the origination.

在色素置换后的反应中心中，以B为起点的能量传递较天然RC的情况明显减慢，约在450fs左右，考虑到置换后的反应中心中P的自由能有所提高以及其仍然保持的光化学活性，这一较慢的能量传递也可能预示着还存在着其它的能量传递通道；另外，还对酸性处理的反应中心中的超快光动力学过程进行了尝试性的研究，发现由于色素分子的聚集以及蛋白环境的改变，BChl分子的激发态动力学过程有着明显不同于天然反应中心的情况。

It also requires that students be free from the concerns of hand-to-mouth living so as to be able to concentrate on in tellectual pursuits.

同时它也要求学生要从勉强糊口的生活中释放出来，以便能全身心地投入到学术的追求中去。

Are you sure? I'm free right now, and I'd be glad to give you a hand.

你肯定吗？我现在有空，我愿意帮你一个忙。

Observe, then, the possibility that lies before you. On the one hand, if you can control your mind in its subconscious activities, you can regulate the operation of your bodily functions, and can thus assure yourself of bodily efficiency and free yourself of functional disease.

另外，让我们来仔细观察摆在你面前的种种可能性，如果你能用潜意识活动来控制你的思想，那么你就能控制你各个身体机能的运作，也就能保证你机体行为的有效性并避免生病了。

All 8,992 free typefaces have been hand-categorized into 3000+ categories for all Your designing needs!

所有8992免费字体已被人为分为3000 +您的所有需求，设计类！

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。