分子束

To investigate the influence of surfactant molecular structure on micellization in solution, we used molecular dynamics to simulate the molecular structure and interaction of three alkyl aryl sulfonates in vacuum and in solution.

为研究不同结构的表面活性剂分子在溶液中胶束化能力的差异，采用分子动力学方法模拟三种烷基芳基磺酸盐在真空和水溶液环境下的结构与相互作用。

The polymeric micelles are composed of inner hydrophilic imidazolium moiety and outer hydrophobic long chains. Thus, these poly are capable of extracting hydrophilic dye such as Congo Red from its aqueous solution into the organic phase to form the supramolecular aggregates.

这些胶束外部具有疏水烷基长链，内部是亲水的极性空腔，对客体分子具有识别、包结、萃取能力，可以高效的将亲水性染料刚果红分子从水相中几乎完全地包结萃取进入有机相。

The variation of particle size in dispersed phase was determined by the changeable value of interface tension.

本文认为，两相之间的界面张力是影响分散体系最终结果的内在因素，界面张力的变化从根本上决定着分散体系中分散相粒子的大小；表面活性剂分子在界面上的排列方式是影响界面张力的主要因素；临界胶束浓度CMC是决定界面上表面活性剂分子排列情况的定量判据。

The relation of interfacial adsorption equilibrium in the solution system was respectively tested and calculated with Gibbs equation and dynamic method .The conclusion showed that (1) the experiment result of dynamic method with was highly in coordination with the value which from theoretical calculation.(2) The surfactant molecule was in arrangement of monomolecular layer at the gas-liquid interface.

用吊环法测定了十二烷基硫酸钠水溶液不同浓度与其界面张力的关系，拟合得到的回归方程为σ=-0.9523 ln ~2C-24.534 ln C-81.411，同时还测得其临界胶束浓度值CMC为6.5×10~(-3M，运用吉布斯等温方程和动态法分别计算和测定了该溶液系统的界面吸附平衡关系，结论表明：(1)动态法测定结果基本吻合吉布斯方程的理论计算；(2)表面活性剂分子在气—液两相界面是以单分子层形式定向有序排列的。

The major results obtained are: PCR-RFLP method is suitable for molecular identification of Shihu; 205 compounds were isolated from 10 species of Dendrobium, including 21 new compounds, and 28 compounds isolated from genus Dendrobium for the first time. Each of the extracts and compounds were screened for anticoagulant and antitumour activities separately. The results indicated that the ethyl acetate extract from Dendrobium chrysanthun has significant anticoagulant function; the antitumour function of the 4 bibenzyl components from Dendrobium chrysotoxum is stronger than that of phenanthrene, of which the erianin has significant anti-angiogenic effect both in vivo and in vitro; components with moderate or stronger antitumour activities were found in the extracts of D. thyrsiflorum, D. chrysanthun and D. trigonopus; quality standard for 5 species of Dendrobium was drawn up use active or indicative components as control.

重要研究结果有：经方法学研究，认为PCR-RFLP法适于作为石斛属药材分子标记鉴定方法；对10种石斛进行化学成分分离鉴定，共分得205个化合物，其中新化合物21个，首次从石斛属分得的28个；对提取物和各单体化合物分别作抗凝血、抗肿瘤等活性筛选，结果说明束花石斛乙酸乙酯部位有显著的抗凝血作用，鼓槌石斛的4个联苄类成分抗肿瘤作用强于菲类，联苄类毛兰素在体内外有显著抗血管生成活性，球花石斛、束花石斛及翅梗石斛均筛到中等或较强抗癌活性的成分；选择有活性或指标性成分作对照品，对5种石斛草拟了质量标准。

The results show that the conformation of copolymer molecules is totally different from that of carboxy methyl cellulose because of the introduction of the surface active macromonomers.

结果表明，共聚物在水溶液中的形态完全不同于羧甲基纤维素分子，亲水疏水链段的引入，使共聚物分子聚集形成了以疏水链段为核心的棍状胶束结构。

Owing to the action of space separation in inclusion compound and the solvationof water for isolating the charge in ion pair, the lifetime of C〓 anion radical inaqueous system was obviously longer than that in organic solvents.

对同种胶束，给体分子的取代烃链越长，意味着其疏水性增加，导致给体端N原子与C〓分子间距离缩短，从而降低了阴离子自由基的寿命。

It is possible that magnetic field suppresses the phosphorescence quenching of triplet oxygen molecules and/or promotes the efficiency of S-T intersystem crossing through Tl〓.

可能是磁场具有一定抑氧作用，同时，磁场有可能通过Tl〓间接与胶束中激发态的N分子作用，提高N分子的S-T系间跨越效率。

In the mixed micelle of SDNS/SDSN system the sulfonate groups of SDSN are embedded in the naphthyl rings of SDNS,i.e.

在SDNS/SDSN混合胶束中，SDSN的磺酸基比SDNS分子更靠近胶束内部。

The fibrils of three levels,Which were macrofibrils of several tens micron in diameter,fibrils feW micron and microfibrils about 0.3 micron,were observed simultaneously with banded texture usingpolarized microscope.After annealing,fibrils in different levels relaxed to differentmorphology.Macrofibrils still oriented along shear direction,but fibrils relaxed to helical form,and microfibrils relaxed to waveform therefore the banded texture canbe seen.The smaller the diameter of fibrils was,the more easily the fibrils relaxed.Ori the other hand,the banded texture decoration of annealed unoriented filmsrevealed directly the distribution of directors within and out of domains and thevariation of directors on boundaries.

微纤分三个层次，即直径分别为数十微米的微纤束、数微米的微纤和0.3微米的亚微纤，退火后三个层次的微纤松弛成不同的形态，微纤束仍笔直沿剪切方向取向，微纤松弛成螺旋形，而亚微纤松弛成波浪形从而观察到条带织构：微纤直径越小越易松弛，另一方面，非取向态织构退火后由亚微纤形成的条带装饰结果直观地揭示了微区内外分子指向矢的分布和它们在边界上的变化。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。