在水中的

We examine the asymmetric Aldol reaction with cyclohexanone and aldehyde using tunable and bifunctional organocatalysts in aqueous media.

相反，尽管在盐水溶液中的反应效果可以比在水中的效果要好，但是较少有使用盐水溶液作为反应介质的报道。

The track structure of low electron, proton and alpha particle in water as a media has been calculated with Monte Carlo method. The spectrum of DNA damages has been simulated by the track structure model. Then the surviving fraction at different dose level is calculated by connecting track structure and phenomenological dynamic model.

在理论方面，对电子、质子和α粒子在水中的径迹结构进行了系统地研究与计算，还编制了我们自己的质子的蒙特卡罗模拟程序；用径迹结构模型计算出电离谱并与动力学模型相联系，计算出有实用价值的成活率。

Critical angle of refraction - semi-circular cylindrical mobile light source, the incident angle change the size of refraction angle to change at this time, when the refraction angle = 90 degrees, which is critical at this time angle of incidence angle, the critical angle of water at 40 degrees large about anything mobile source of water in the water screen that is a reflection of light, a phenomenon that total reflection.

光折射的临界角定义：光折射角=90度时，入射角即为临界角，按二方法，将半导体激光光源去掉铁夹，吸附在右下角的铁板上入射光对准中心，即产生折射光线，沿半圆形柱面移动光源，改变入射角的大小，这时折射角也改变，当折射角=90度时，这时入射角即为临界角，水的临界角大的在40度左右，再做移动光源在水中的水屏即出现反射光线，这种现象称全反射。

As any avid angler will tell you, the more time that you can spend with your line in the water the better.

任何热衷钓鱼会告诉你，时间越长，你可以花费与您的线在水中的更好。

Moreover, the atomy economy increases; meanwhile, the environment effect decreases. This experiment need not consume sodium chloride to reduce the 4-chloro-2-nitrophenol solubility. The working procedure of hydrolysis may participate in reduction process without being liquid-solid separation; consequently there is no waste water to bring contamination.

将中间体4-氯-2-硝基苯酚钠(C6H3ClNO3Na)改为4-氯-2-硝基苯酚(C6H4ClNO3)的工艺，其原子利用率和环境因子有所提高；不需再加入食盐来降低4-氯-2-硝基苯酚在水中的溶解度；水解反应不需要进行固-液分离，直接进入还原工序，没有"三废"问题。

In addition, liquid oxidation of carbon black was also discussed.

说明本文的改性方法可以显著提高炭黑在水中的分散稳定性。

Objective To research the viable time and the influencing factors of Escherichia coli in water environment.

目的 研究大肠埃希菌在水中的存活时间及影响存活时间的因素。

It's obviously that the polyethylene glycol 1000 as disperser can improve the disperstiveness of BST powder in water.

使用聚乙二醇1000作为分散剂，可以使BST粉体的ζ电位由-9.61改变为-31.46，大大改善BST粉体在水中的分散性。

The performance of the apparatus was evaluated by measuring the enthalpy of solution of KC1 in water at T =

在温度为298.15 K时，通过测量氯化钾在水中的溶解焓的标准方法来评价这套装置的性能。

They can push themselves through the water by twisting their bodies from side to side.

他们可以把自己在水中的扭动自己的身体从一边到一边。

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。