二分子

Making use of the characteristic of neutron,without electricity 、strong penetrating power、ability to di...

中子散射技术利用中子不带电、穿透力极强、能直接鉴别核素、较之X射线对轻元素灵敏、具有磁矩和波粒二象性等特点，使之成为一种独特的，从原子和分子尺度上研究各种物质结构和微观世界运动规律的高新技术。

The establishment and relaxation processes of the transient gratings, which are formed by two recording 514nm beams with different polarization directions, SS, PP, SP and ±45℃, are investigated. Using the weak absorption of the chromophores at 632. 8nm and the positive dichroism of the chromophores molecules, a kind of bi-photonic transient gratings, owing to the periodic distribution of Trans and Cis isomers, is established first time in azo-dye doped polymeric bulk sample.

实验考察了两束514nm的写入光在不同偏振情况下（SS，PP，SP和±45），在样品中形成的瞬态栅的建立和弛豫情况；利用偶氮生色团在632.8nm波段的微弱吸收和生色团分子的正二向色性，首次在块状偶氮聚合物材料中形成一种基于生色团反式和顺式异构体密度分布的双色光瞬态栅；利用瞬态栅的快速建立和弛豫，考察了其在衍射型全光开关方面的潜在应用。

The TiO2 synthesized by normal and reverse micelles as templated were applied for phot ocatalytic of Rhodamine B and organic toxic small molecule 2.4-dichlorophenol under ultraviolet irradiation. Oxidation species and photodegradation products in the photoreaction process were detected for studying their photocatalyst properties. The results showed that: the R-TiO2 had a better photocatalysis property under UV irradiation when photodegradation of RhB and DCP compared to the N-TiO2. After 160min, the mineralized rate of RhB can be 95%. And the oxidative species was mainly referred to OH radical.

利用正相和反相胶束介质模板制备的纳米TiO2为光催化剂，在紫外光照射下，对染料罗丹明B和有机有毒无色小分子2，4-二氯苯酚进行光催化降解，研究了其光催化性能，并对光催化过程中氧化物种及降解产物进行了跟踪测定，结果表明，反相胶束模板体系制备的纳米TiO2与正相胶束介质制备的纳米TiO2比较，在紫外照射下对RhB及DCP的降解有较好的光催化性能，对RhB在160min尤催化矿化率可达95%，光催化反应主要的氧化物种涉及在基自由基。

At present, there are two fluorescent probes being used in the ORAC assay, the β-phycoerythrin, an fluorescent algae protein; and fluorescein, an organic fluorescent molecule.

目前使用在ORAC分析法之萤光探针有β-Phycoerythrin及Fluorescein二种，前者为藻类萤光蛋白而后者为有机分子。

Therefore, the density functionals, whether or not to include the dispersion, should have a correct prediction of the strong polarization plane structure.

结果表明：(1)在有分子间氢键的TATB二聚体中，库仑力足以与交换排斥力相抗衡，起主导作用。

Calculated its molecular second-order polarizability β, and a comparative study on its pertinent derivatives is carried out.

计算了其分子二阶非线性光学系数β，并与相应的衍生物作了比较研究。

Its static polarizability aand second-order hyperpolarizability γ are calculated by the use of a finite field approach.

通过有限场方法，我们计算了该分子的静极化率α和二阶高阶极化率γ。

Molecular dynamics simulations of NPT (constant pressure and constant temperature) dynamics are carried out to obtain specific volume as a function of temperature for polyethylene , polypropylene , poly-isobutylene , polyoxymethylene , and polydimethylsiloxane .

用NPT分子动力学模拟来获得聚乙烯、聚丙烯、聚异丁烯、聚甲醛和聚二甲基硅氧烷在不同温度下的特征体积。体积玻璃化转变温度通过对模拟得到的V-T作图的曲线的拐点决定。

Using porphyrin to reinforce photocatalytic capability of TiO2 has always been a target for chemists to work with.

中文摘要利用紫质分子优异的吸光能力来加强二氧化的光催化性质，一直是化学家们努力的目标之一。

Apart from Prevost and Aliste,how many others who never pulled the levers of international power were murdered or maim ed by gundamentalists,from Sri Lanka to Riyadh,in the week after Rabin was killed?

在拉宾遇刺以来这一周，除了普瑞弗斯和费尔南德斯二人之外，从斯里兰卡到利雅得还有多少从来没有掌握国际权柄的人遭到狂热分子残杀或伤害？

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新