查询词典 precipitation

The main disadvantage of this method is that the tannase comes into the tea and it has to be inactivated by a heat treatment, which is detrimental to the quality of the treated tea, or by a precipitation method which also impairs the quality of the tea.

这个方法的主要缺点是丹宁酶进入到了茶中，因而必需用热处理来使丹宁酶失活，或用沉淀的方法来除去丹宁酶，但这两种方法都会损害所处理的茶的质量。

Author tetradecyl acrylate used as a hydrophobic monomer, the direct use of precipitation polymerization Preparation of hydrophobically associating polymer P copolymers, so that the product of copolymerization and post-processing is more simple and easy process.

作者采用丙烯酸十四酯作为疏水单体，直接用沉淀聚合法制备疏水缔合型聚合物P共聚物，从而使共聚反应及其产物的后处理过程较为简单易行。

Acrylamide/tetradecyl acrylate hydrophobically associating water-soluble copolymers were synthesized in DMF by precipitation copolymerization.

采用沉淀聚合法制备了疏水缔合型聚合物丙烯胺/丙烯酸十四酯共聚物P。

Fe3O4 nanoparticles with 6-8nm in diameter were prepared by co-precipitation and tetramethylammonium hydroxide was used to disperse the Fe3O4 nanoparticles in aqueous.

首先用共沉淀法制备了粒径为6-8nm的Fe3O4微粒，并利用氢氧化四甲基铵将Fe3O4微粒分散在水相中。

Using the thermostable ability of Taq DNA polymerase, the protein was immerged in a 75℃ water-bath for 1h, and then obtained by the method of ammonium sulfate precipitation.

利用Taq酶的热稳定性，将破胞液在75℃水浴1h，然后用硫酸铵沉淀法获得纯化的表达蛋白。

With titanyl sulphate and commercial urea as the raw material ,nanometer TiO2 is a material of environment,it with a close size distribution and fine dispersion was prepared by homogeneous precipitation.

本文以硫酸法钛白粉生产中产生的硫酸氧钛和工业品尿素为原料，采用均匀沉淀法制备了粒度分布窄，分散性好的纳米级TiO_2环境材料。

nanometer TiO_2,titanyl sulfate,homogeneous precipitation method,commercial production

采用廉价、工艺简单的制备方法获得高性能的纳米TiO2，是现今工业化生产纳米TiO2所追求的主要目标。以硫酸法TiO2生产的中

A new process for synthesing barium titanyl oxalate tetrahydrate-spray reaction were proposed on the basis of applying the principle of homogeneous precipitation in the droplets mini-reactor.

首次在液滴&微反应器&中借用均相沉淀反应的原理，即通过水解剂水解出的草酸与液滴中的钡钛离子发生共沉淀反应生成草酸氧钛钡，进而煅烧制得钛酸钡粉体。

Tophaceous gout results from continued precipitation of sodium urate crystals during attacks of acute gout.

沙粒状痛风是由急性痛风发作期尿酸钠盐结晶继续析出引起。

The hydrologic cycle, a major topi c in this science, is the complete cycle of phenomena through which water passes, beginning as atmospheric water vapor, passing into liquid and solid form as precipitation, thence along and into the ground surface, and finally again returning to the form of atmospheric water vapor by means of evaporation and transpiration.

水文循环，作为该学科中的一个主要课题，指的是水所经过的诸现象的整个循环过程，开始时是作为大气中的水蒸气，转而作为雨、雪、露、雹一类的降水量经过液体和固体形态，由此而沿着地层表面分布或进入地层表面，最终通过蒸发和散发作用再度回复到大气水蒸气的形态。

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。