分子

Other astronomers have detected these molecules before in interstellar space, but the researchers report in tomorrow's issue of Science that they have pinpointed the location of these molecules in AA Tauri's disk, which means they might have been manufactured there.

其他的天文学家们以前在星际空间发现过这些分子，但是研究人员们在明天的出版的《科学》杂志上报道说：他们找出了这些分子在" AA 托莱"圆盘中的具体位置，这意味着这些分子可能是就地形成的。

The strong extension and random curling of HA molecule result in tremendous domain, the hydrodynamics volume is ten times larger than the possessing space of its un-hydrated form. Further more, molecule chains twist between each other to form a consecutive reticular structure, which reacts with water molecule via polar bond and hydrogen bond.

HA分子在溶液中高度伸展和随机卷曲构型使其占有很大区域，其流体动力学体积较未水化时所占空间大l0倍，而且分子链之间相互缠绕形成连续的网状结构，水分子通过极性键和氢键与其直接作用。

Diffusion of molecules with molecular weights ranging from 32 to 339 in amorphous polyethylene terephthalate was examined by using molecular dynamics simulation.

采用分子动力学模拟研究了相对分子质量在32～339范围内小分子在无定形PET中的扩散过程。

Reporter molecules (thiophenol, bipyridine derivates, cyanopyridine derivates) were attached to different immuno-gold colloids, respectively. By means of the specific adsorption between antigen and antibody, a sandwich structure was constructed, in which labelled immuno-gold colloids and antigen covalently bound to substrate specifically capture different antibodies.

以多种不同的标记分子(苯硫酚，联吡啶类分子，氰基吡啶类分子)分别标记多种不同免疫金溶胶，通过抗体抗原之间所具有的特异吸附性，进一步组装"固相抗体-待测抗原-标记免疫金溶胶"多组分三明治复合体系。

In order to lower the Δn value and obtain broad mesophase range, new negative dielectrics anisotropy liquid crystal compounds 4a and 4b were designed by replacement a phenyl ring with a cyclohexyl ring in the common tolane liquid crystals.

为降低液晶分子的双折射率并获得宽液晶相区，用环己基替代传统二苯乙炔液晶分子中的一个苯环，得到一类结构新颖的含乙炔桥键的负介电各向异性液晶分子4a， 4b。

According to the H NMRstudy, it was found that the protons on the cyclopentadienyl ring of 〓 were not splitted, but when one proton on the cyclopentadienylring was substituted by methyl, that is in〓 complexes, thefour protons on the ring were splitted into four groups,the 〓 between the onesignal and the others is large, the total splitting is over 2ppm. The splittings werealso affected by the halides linked with the titanium, they increase according to theorder of CI, Br, I. By the study of the 〓 Sn NMR, it is found that the chemicalshifts of 〓 are present in low field. It is assume that the large space strain causesthe angles of the tin linked with ligands deviate from the normal tetrahedral anglesresults low field shift for 〓Sn. And by MS study,there were no molecular ions for 〓 complexes in the spectra. However, for 〓 when X=CI,Br,NCO and Ar is tolyl or phenyl group,there were molecular ions,but theirabundances were very small,and no that for the iodide was found.

钛上的卤素对茂环氢的裂分也有影响，依〓，Br，I顺序，卤素对茂环氢的裂分依次加大；通过对〓的研究发现，以上这些化合物〓的化学位移都出现在低场，认为大的空间张力造成的锡的键角偏离正常的锡的四面体键角是造成〓化学位移出现在低场的原因；对这些化合物质谱的研究发现，〓系列化合物得不到分子离子峰，而〓系列的化合物，当X=〓，NCO和苯环上不带取代基或只带甲基时，则出现分子离子峰，但丰度很低，而相应的碘化物和其它化合物则没出现分子离子峰。

For the VSS molecular model, the internal energy exciting and relaxation probability is established to simulate energy exchange involving translational, rotational and vibrational modes based on Larsen-Bergnakke model.

对于多组元的VSS分子模型，引入分子内能激发和松弛概率，采用L-B模型来描述碰撞分子的平动、转动和振动之间的能量交换。

We mainly detected the TOF and angular distribution of photofragment, and get the anisotropy parameter β and the translational energy distribution. In addition, we calculated the geometries of the ground states, the excited states and the triplet excited states, and the transition electric dipole moments. According to these, the dissociation lifetimes of some molecules are calculated.

主要是探测了光解碎片的时间飞渡谱和角分布并通过前向卷积方法拟合得到了各向异性参数β和光解碎片的平动能分布；此外还用从头计算方法计算了反应物分子的基态、激发态、三重激发态的平衡几何构型和分子的跃迁偶极矩并据此计算了一部分分子的解离态寿命。

We study the phase-separation and microstructure of the pure binary and trinary mixed LB and LS films of Dimyristoyl phosphatidyicholine cholesteroland sphingomylin deposited from pure water subphase by π-A isotherms and tapping mode Atomic Force Microscopy.

在本章中我们用这种极易溶于水的阳离子型聚合物PEI为一软垫，研究以此软垫为基底的不同生物分子和它们不同种二元及三元混合单分子膜体系在含PEI亚相上的相结构情况，初步的讨论了它们以云母为基底的IS膜和LB膜的微结构或者说是该软垫对单分子膜微结构的影响。

With the development of single moleculer manipulation.Much research work has been done on DNA by optical tweezer, magnetic tweezer, micropipe, and so on. All these work has opened a new area in molecuer biology.

随着单分子操作的实验技术的发展，人们通过光镊、磁镊、微吸管等等，研究DNA分子的力学性质，探索DNA与蛋白质的相互作用，为分子生物学的研究开辟了新的天地。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。