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The catalysts used in the preparation of di acetone alcohol by the Aldol condensation were studied in detail, and a new kind of catalyst Ca 2/Al 2O 3 is developed.

对丙酮经Aldol缩合制二丙酮醇的催化剂进行了研究，研制出新型催化剂Ca 2 /Al2 O3，这种催化剂对丙酮的缩合反应具有较理想的活性及选择性。

Reaching 200 feet (61 meters) in length, the plant serves double duty: It provides habitat and nourishment for marine life and is a source of algin, a stabilizing, thickening, gelling, and suspending agent used in human food preparation.

达到200英尺（ 61米）的长度，该植物提供双重任务：它提供了栖息地和养料为海洋生物和藻胶的来源，一个稳定的，增稠，胶凝，和悬浮剂用于人类食物的准备。

All of this lay a solid foundation for large-scale preparation and application of alginate lyase.

该菌株产酶发酵条件的研究，为褐藻胶裂解酶的大规模制备及应用奠定了基础。

Simultaneously,alginate composition showed be determined and preparation of its special samples be studied.

并对海藻酸钠的结构组成和特种海藻酸钠品种的制备进行了探讨。

A spray coagulation method was developed for the preparation of large scale of porous alginate microparticles.

报道了一种适合于放大规模的制备多孔隙的海藻酸微球的方法-喷雾-凝聚法。

The report also calls for strangling strengthening the math preparation of alimentary elementary and middle school teachers.

报告也要求加强初等和中等学校教师的数学准备工作。

Control experiment results of white soil acidification with alkali treatment or not shows that alkali treatment is the key to 4A zeolite preparation.

进一步对酸化白土进行碱处理的对照实验，得出进行碱处理是制备4A分子筛的关键。

MAIN OUTCOME MEASURES: Preparation of fibroblast feeder layer; growth of embryonic stem cells; results of alkaline phosphatase staining; cell differentiation tendency.

主要观察指标：成纤维细胞饲养层的制备情况，胚胎干细胞的生长状态、碱性磷酸酶染色结果及分化趋势。

The preparation methods of ultrafine alkaline earth aluminate and its properties were reviewed in this paper.

对超细碱土铝酸盐长余辉发光材料的制备方法及其制备后产品的性能做一综述，分别介绍了燃烧法、溶胶-凝胶法和水热法在制备超细碱土铝酸盐长余辉发光材料中的应用。

Preparation and Characterization of Electrodeposition MHCF(M=Ni, Co, Cu) for Electrochemically Controlled Ion Separation in Alkaline-Earth Metal

中文名称：电沉积MHCF薄膜系列的制备及其在碱土金属溶液中的电控离子分离性能

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。