查询词典 chemical method

SiO2 aerogel was prepared by using waterglass as the Si source, formamide as the catalyst and glycol as the drying chemical controlling additive via sol-gel method and ambient pressure drying.

以水玻璃为硅源，甲酰胺为催化剂，乙二醇为干燥控制化学添加剂，采用溶胶－凝胶法常压下干燥制备了硅石气凝胶粉体。

The geometries of [99mTc-DADS]+ complexes are optimized by semi -empirical quantum mechanics method ZINDO/1 and many physical and chemical desc riptors are obtained. Multiple regression between this drescriptors and urine up take of 120 min post injection is done and one equation is obtained.

用分子力学、半经验量子化学方法中的ZINDO/1方法对[99mTc-DADS]+系列配合物的结构进行了优化，做了电子结构计算，得到各种物理化学参数和电性参数，并将这些参数对膀胱120 min摄取值进行多元线性回归分析，得到了回归方程。

Combined use of trypsin, hypertonic solution and chemical detergent is a better method to prepare acellular vascular matrix, and the vascular matrix be wellpreserved in liquid nitrogen.

液氮保存后1、2、3月扫描电镜观察与新鲜标本无明显差别。结论酶、低渗溶液、化学除垢剂联合法是制备脱细胞血管基质的较好方法，制得的脱细胞血管基质可放入液氮中保存。

A new method based on elements and chemical bonds was developed for estimating critical volume of organic compounds.

提出了一种基于元素和化学键的估算有机物临界体积的新方法。

Corresponding energy and chemical potential are also worked out by numerical method.

并且，通过数值模拟我们计算了不同原子数的能量和化学势。

And then, the computing method of pressure for fluid systems with periodic boundary conditions is adopted to investigate the relation between chemical potential and bulk pressure in an open system.

采用改进后的Widom测试粒子方法和周期边界流体系统的压力算法，研究开放系统的化学势随压强的变化，给出了具体的函数关系，并证明了其正确性。

Basic garment pattern generation using geometric modeling method Sungmin Kim Faculty of Applied Chemical Engineering, Chonnam National University, Kwangju, South Korea, and Chang Kyu Park Department of Textile Engineering, Konkuk University, Seoul, South Korea Abstract Purpose – The generation of individually fit basic garment pattern is one of the most important steps in the garment-manufacturing process.

基本的服装模式生成使用几何学模型法 Sungmin金使用的化学工程，Chonnam 国家大学才能，光州，韩国，和常Kyu 公园纺织工程，Konkuk大学，首尔，韩国系摘要目的-这代分别适合基本服装图案在最重要的台阶之一穿服装生产过程。

The α-BaB〓O〓 crystal is colorless, transparent and without cracking. The cracking problem has been overcome by a special growth procedure. The dislocation density, crystallization morphology and growth habit of α-BaB〓O〓 crystal have been systematically studied by chemical etching method, X-ray laue orientation of synchrotron radiation, double-crystal diffraction topography. The growth striation and irregular dislocation consist of the primary defect in α-BaB〓O〓 crystal. The convex solid-liquid interface is stable during the whole growth process.

在国际上首次采用提拉法生长出φ50×40mm〓的α-BaB〓O〓晶体，生长方向为[0001]，晶体完整、无色透明；提出了三种固相反应的原料制备方法，并保证B〓O〓过量1mol%；采用独特的生长装置和程序有效地解决了α-BaB〓O〓晶体易开裂的问题；首先采用化学腐蚀法、白光X射线衍射术、X射线双晶衍射形貌术等研究了α-BaB〓O〓晶体的位错密度；首次采用同步辐射X射线劳埃定向术研究了α-BaB〓O〓晶体的结晶形态及生长习性；结果发现α-BaB〓O〓晶体的缺陷以位错为主，部分α-BaB〓O〓晶体中存在生长条纹。

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。