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K-doped Li2ZrO3 super fine powder has been synthesized by citric acid-ethylene glycol sol-gel method using the nitrates of lithium, zirconyl, potassium as starting materials. The precursor of K-doped Li2ZrO3 and the powder of K-doped Li2ZrO3 have also been characterized by TG-DSC、XRD、SEM measurements. The decomposition of the gel and the formation of the tetragonal crystalline form were analyzed.

采用柠檬酸-乙二醇络合法，以硝酸锂、硝酸氧锆、硝酸钾为原料制备了掺钾Li2ZrO3超细晶体粉末，采用TG-DSC、XRD、SEM等手段对掺钾Li2ZrO3的前驱体及掺钾Li2ZrO3晶体粉末进行了表征，分析了凝胶的热分解变化过程和四方晶形结构的形成过程。

Zymogen Any of a class of proteins that are secreted by cells and are inactive precursor s of enzymes.

原一类本身不表现催化活性，但在机体内可转变成(特别是转变成催化蛋白质降解反应的)的蛋白质。

The products obtained by reacting titanium butoxide with acetylacetone were used as the titanium precursor.

采用钛酸丁酯和乙酰丙酮作用后的产物作为钛的前驱体，水热法一步合成出了 Ti-SBA-15分子筛。

The optimized preparation of CuInSe2 thin films by DC-magnetron sputtering the metal precursor followed by adenization is investigated by means of the four-factor and four-level orthogonal experimental method.

采用四因素四水平的正交实验法优化了磁控溅射金属预置层后硒化法制备CuInSe2薄膜的工艺条件。

Atypical Adenomatous Hyperplasia of the human lung has been recently implicated as a possible precursor lesion of bronchioloalveolar carcinoma.

非典型腺瘤样增生的人肺癌最近已经有牵连作为一个可能的前驱病变的细支气管肺泡细胞癌。

While for the solution without urea, no combustion reaction took place and a badly agglomerated precursor was formed.

而没有添加尿素的溶液中没有燃烧反应发生，合成的前驱物为比表面积低的块状团聚体。

The change of activity,specific rate,turnover frequency,acid coverage and the coverage ratio of acidic to alkalic surface area had a similar regularity with the change of the state and the composition of iron oxide precursor of catalyst.

随着母体铁氧化物性质和组成的变化，催化剂活性、质量反应速率、合成氨转换频率和表面酸覆盖度及其酸碱覆盖度的比例有相似的变化规律，即与Fe2+/Fe3+呈驼峰形变化曲线。

For decreasing the quantity of the organic solvent and saving the environment, this paper is focused on the preparation of stable TiO2 sol by using titanium alkoxide as precursor and water as solvent while adding acetic acid for the purpose of moderating the rate of hydrolysis.

溶胶-凝胶处理可以在织物的表面形成复杂的氧化物网络结构，这层凝胶固着在织物的表面，改表纤维的表面化学性能，赋予织物一定的功能性。

The precursor solutions of titanium alkoxide with different amount of AcAc were characterized by DTA to study the chelating process of titanium alkoxide with AcAc.

对含有不同量乙酰丙酮的前驱体溶液做了热重分析，研究了钛酸丁酯与乙酰丙酮的螯合过程。

SiO vapor is an important precursor for both carbonthermic and aluminothermic reactions. The rate-controlling step is the reaction in which SiO〓 is reduced to form SiO .

研究发现，无论碳热还原或铝热还原，SiO气体是重要的中间产物，SiO〓还原为SiO的反应是整个还原氮化过程的速度控制步骤。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了