分子

The DNA's jiggle was added to suggest Brownian motion caused by thermal energy and agitation by surrounding molecules.

DNA分子的摆动，是由于周围环境中分子的热运动而产生的布朗运动。

Objective To observe and compare the changes in corneal sensitivity after photorefractive keratectomy and laser in-situ keratomileusis for myopia.

目的 观察和分析准分子激光屈光性角膜切削术(photorefractive keratectomy， PRK)和准分子激光原位角膜磨镶术(laser in-situ keratomileusis，LASIK)治疗近视后角膜知觉的变化。

The overexpression of HLA-DR and ICAM-1 is related to corneal inflammation and can promote the occurrence of keratoplasty rejection.

人类白细胞抗原DR分子和细胞间粘附分子-1的异常表达与角膜炎性反应有关，并可促进移植排斥反应的发生。

Objective To study the effect,stability and safety of photorefractive keratectomyand excimer laser in situ keratotomy.

目的 探讨准分子激光角膜切削术及准分子激光原位角膜磨镶术矫治角膜放射状切开术后残留近视的安全性、稳定性和可靠性。

Radial keratotomy Residual myopia Photorefractive keratectomy Excimer laser in situ keratomleusis

放射状角膜切开术；近视；准分子激光角膜切削术；准分子激光原位角膜磨镶术

It is important theoretically and practically that the ketene photodissociationas a model system for unimolecular dissociation.

乙烯酮分子的光解反应作为研究单分子解离的模型系统具有重要的理论和实际意义。

Molecular configurations in LB films undergo change from keto form to zwitterion assurface pressures increase,companied by intermolecular hydrogen bonds decreaseand intramolecular hydrogen bonds increase.

在LB膜中，随表面压增加，分子间氢键减少，分子内氢键增加，SBC18头基构型在转折区发生醌式→双性离子构型转变。

When surface pressures are lower than the turnover(5～30mN/m),intermolecularhydrogen bonds were formed with keto form and phase transition was higher ca.60℃;most of SBC18 formed intramolecular hydrogen bonds companied withzwitterion form and phase transition was lower ca.48℃ while at surface pressurehigher than the turnover(≥45mN/m),which is caused by the different interchaininteraction arising from various hydrogen bonds for SBC18 LB film deposited atdifferent surface pressures.

低于相应π-A等温线转折(5～30mN/m)时，以分子间氢键为主，头基主要以醌式构型存在，相变温度较高(≈60℃)；高于转折(≥40mN/m)时，以分子内氢键为主，头基主要以双性离子构型存在，相变温度较低(≈48℃)。

Based on the molecular topological theory, Kier's shape index (superscript mK of 18 substituted phenols are calculated in this paper.

基于分子拓扑理论，计算了18种取代苯酚的Kier分子形状

Kier s molecular shape indices(~1 K,~2 K)are calculated for 165 nonionic organic compound s.

通过分子形状指数及苯环因子建立有机物生物富集因子B_(CF的良好QSAR模型，计算了165种非离子性有机物的分子形状指数(~1K、~2K)。

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。