查询词典 precipitation

The precipitation behavior of AlN can be verified by thermodynamic and kinetics calculation.

对AlN析出的热力学和动力学分析也证实了AlN在铸坯上沉淀析出的合理性。

In this paper the as-cast microstructure, the rules of phase precipitation, the change of microstructure and minor phase content and the degeneration of aluminide coating after thermal exposure at temperature range from 850℃ to 1100℃ for 1000-3000 hours have been studied in comparison between two kinds of low chromium-high tungsten cast nickel-base superalloys.

本文对比地研究了两种低铬-高钨系列的铸造镍基高温合金的铸态显微组织，在850～1100℃范围内热暴露1000～3000小时后的相析出规律，显微组织和微量相的变化及铝化物涂层的蜕化。

Experimental conditions that a great deal of copper matrices were separated as well as trace Se and Te were concentrated in ammoniacal solutions by co-precipitation separation were studied.

研究了采用共沉淀分离手段在氨性条件下分离大量铜基体并富集痕量硒、碲杂质的实验条件。

The object of this study is to evaluate the immunoregulation and anti-tumor activities of Arnebia root polysaccharide in vitro. The ARPS was obtained by hot-water extraction, alcohol precipitation, de-protein, de-color, and dialysis etc. from Arnebia root and was administered on mouse spleen lymphocyte and tumor cell with 24 μgmL^(-1), 121 μgmL^(-1), 364 μgmL^(-1), respectively.

为研究紫草多糖在体外对小鼠脾淋巴细胞的免疫调节活性及对肿瘤细胞的细胞毒作用，本实验采用水提醇沉法，经脱蛋白、脱色、透析等方法提取紫草多糖，MTT法检测紫草多糖对淋巴细胞增殖及对HepG2、SPC-A-1肿瘤细胞的杀伤作用。

Comparing with the activity of NiO/γ-Al_2O_3, NiO/TiO_2, and NiO/CeO_2catalysts, NiO/CeO_2 showed the highest light-off conversions of NO and CO and lowesttemperature of total conversion. Three kind of CeO_2 prepared by homogeneousprecipitation, precipitation, and direct decomposition method wereused as the carrier of NiO. Through the activity comparison of NiO/CeO_2, NiO/CeO_2and NiO/CeO_2, CeO_2 optimized as the preferable carrier for active component at aspace velocity of 120 000h~(-1, the coversion of NO is 50％at 170℃over NiO/CeO_2catalyst, and the complete conversion of NO and CO occurred at 210℃.

由Al_2O_3、TiO_2、CeO_2负载的NiO催化剂在NO-CO反应中的活性比较得出：NiO／CeO_2催化剂具有最好催化活性；分别采用直接分解法、氨水沉淀法和均匀沉淀法制备了载体CeO_2、CeO_2、CeO_2，并比较了NiO／CeO_2、NiO／CeO_2、NiO／CeO_2的活性差异，得出了以尿素作为沉淀剂的均匀沉淀法制备的CeO_2负载的NiO活性最好空速为120 000 h~(-1的条件下，170℃时，NO的转化率为50％；210℃时，NO和CO的转化率均达到了100％。

The incidence of aspiratory infectious diseases was correlated to atmospheric pressure, precipitation, and evaporation.

平均气压、平均蒸发量、平均降水量对呼吸道传染病发病率影响较大。

After cultivating in liquid medium for 5 days, an extra cellularβ-mannanase from Athelia rolfsii strain CBS191.62 was purified 15.1-fold toelectrophoretic homogeneity by ammonium sulfate precipitation, DEAESepharose Fast Flow chromatography, Hydroxylapatite chromatography andrefrigeration crystal.

产β-甘露聚糖酶的Athelia rolfsii菌株CBS 191.62，发酵培养5d，发酵液离心去菌体，上清经硫酸铵沉淀，琼脂糖凝胶层析、羟基磷灰石层析和冷冻干燥结晶等步骤，β-甘露聚糖酶的比活提高了15.1倍，获得凝胶电泳均一的蛋白样品。

The strength and location of the subtropical high in the western Pacific Ocean region and the changed atmospherical circulation caused by the El Nio events,which resulted in the abnormal excess precipitation in Hongze Lake catchment,can possibly serve as the physical mechanism of this phenomenon.

这可能是由于El Nio事件通过改变西太平洋副高的强度与位置，以及大气环流形势而引起的降水异常所致。

In the expansive spaces,the sudden changes of chemical,physical and biochemical conditions lead to final destruction of the auriferous complex compounds and facilitate the precipitation and accumulation of natural gold in the shear belt.

在这些剪切带扩张空间内，由于化学的、物理的及生物化学条件发生突变，导致热液的地球化学平衡被破坏，促使自然金沉淀析出，并聚集在剪切带内构成矿床。

Gel co-precipitation method and heterogeneous azeotropic distillation technics were used in the preparation of ZrO2 and Al2O3 composite powder.

用溶胶共沉淀法辅以共沸蒸馏法工艺制备ZrO2/Al2O3复合粉体，研究了pH值和锆与铝的离子比对复合粉体和用这种复合粉体制备的瓷体的力学性能的影响。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。