前驱

The results showed that the carbon membranes preoxidized at 460℃,30min,and carbonized at 650℃reached the highest permeability.The permeabilities of H_2,CO_2,O_2,N_2 were 1016.4、710.3、187.8、14.0 Barrer1 Barrer=10~(-10cm~3·cm·cm~2·s~(-1)·cmHg~(-1),respectively.The carbon membranes preoxidized at 460℃,30 min,and carbonized at 850℃reached the highest selectivity.The ideal separation factors of H_2/N_2、CO_2/N_2,O_2/N_2 were 129.2、93.1、21.9、respectively.

结果表明：PPESK前驱体经460℃，30 min预氧化处理，650℃炭化得到的炭膜气体渗透性最佳，H_2、CO_2、O_2、N_2的渗透系数分别达到了1016.4、710.3、187.8、14.0 Barrer1 Barrer=10~(-10cm~3·cm·cm~(-2)·s~(-1)·cmHg~(-1)；经460℃，30 min预氧化处理，850℃炭化得到的炭膜气体选择性最佳，H_2/N_2、CO_2/N_2、O_2/N_2的分离系数分别达到了129.2、93.1、21.9。

In our study, polyimide hybrid films containing bimetalic compounds were prepared by codoping poly with a bariumand titanium precursor prepared from Ba(CH_3COO)_2, Ti_4, and acetic acid followed by casting and thermal curing.

陶瓷粉BTL是由Ba(CH_3COO)_2，Ti_4和乙酸制成的钡钛前驱物，采用溶胶凝胶法合成，并由红外光谱和X-射线衍射图证明，在650℃BTL完全转化为BaTiO_3晶体。 3。通过两步法合成含陶瓷粉的聚酰亚胺复合材料。

Phenol is an important chemical in industry, as an intermediate for biphenol A, phenol-aldehyde resins, nylon-6, etc.

苯酚是重要的化工原料，它是制双酚A、酚醛树脂、尼龙—6及其它许多化合物的前驱体，因此工业需求量非常大。

The precursor object was made from the cobalt nitrate,cerous nitrate,carbamide by the methods of hydro-thermal synthesis.It was calcined at the high temperature and the cobalt-cerous oxide powder was obtained.

以硝酸铈和硝酸钴、尿素等为基本原料，采用水热合成法制备出前驱体，经高温锻烧获得铈钴复合氧化物粉体，经TG-DTA，XRD，SEM等检测手段进行表征。

Never down or low. This gives a chestiness, and strength of forequarters, yet not of the "Bulldog" chest.

这样一来，前胸发育良好，使得前驱有力，但不能有斗牛犬样式的胸部。

Meanwhile, the expression of type II collagen, the important marker for chondrogenesis of MPCs, was found in cells treated only with DEX/ TGF-β1 but not cells treated with osteogenic factor or control group.

同时，另一个重要的间叶前驱细胞软骨化表现蛋白第二型胶原蛋白，只有在肾上腺皮质酮跟转形成长因子持续处理的组别中表现，而在其他处理的组别都没有表现。

The results showed that with the same coprecipitation mixing time the average manganese valence of MnZn-ferrite samples were increasing as the pH value increasing.

重点研究了前驱体制备过程中共沉淀时的pH值和共沉淀时的搅拌时间的影响。

Its particle size and distribution were decided by precursor cuprous oxide powder.

铜粉粒径大小和粒径分布取决于前驱体Cu2O粒子的大小和粒径分布。

For the sake of increasing the selectivity of cyclohexene, we suggest that the support and the related precusor of the active component will be disposed in a certain way.

文章提出只有通过对载体及相应的活性组分前驱物进行一定的预处理，才能有效地增加催化剂对环己烯的选择性。

To enable the fabrication of thermally stable ultralow dielectric constant film, specific precursor materials are used, such as, cyclic siloxanes and organic molecules containing ring structures, for instance, tetramethylcycloterasiloxane and cyclopentene oxide.

为了能够制造热稳定超低介电常数材料，使用特定的前驱物材料，例如环硅氧烷和例如四甲基环四硅氧烷和环戊烯氧化物这样包含环状结构的有机分子。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。