查询词典 chemical method

Lead zirconate titanatenanopowder with a composition in the vicinty of morphotropic phase boundary (Zr/Ti=52/48) is prepared by optimizing the technology process of chemical coprecipitation method .

以四氯化钛、硝酸铅、氧氯化锆等为原料，采用化学共沉淀技术，通过优化工艺条件制备了组成在准同型相界点附近的钙钛矿相PZT纳米粉。

The chemical etching method wa applied to form surface texture of multicrystalline silicon in order to reduce the reflectance of the surface.

为了降低光在多晶硅表面的反射，采用化学腐蚀法在其表面制备了绒面。

In this work, the horizontally oriented single-walled carbon nanotubes networks deposited directly on Si wafer substrate by the buffer layer-assisted microwave plasma chemical vapor deposition method were successfully developed, using CH4, C2H2 and H2 as the source gases, and Fe and Nias catalyst materials.

本研究利用缓冲层材料辅助微波电浆化学气相沉积法，以甲烷(CH4)、乙炔(C2H2)与氢气(H2)为反应气体，镍与铁为触媒，成功地开发出在矽晶片上直接合成水平方向网状单壁碳奈米管。

It shows that it is noncorrelation between chemical availability and biological availability, it is indispensable to search new method for the right solution to the problem.

说明现有的化学有效性测定方法和生物有效性间的相关性较弱，有必要探求新的测试方法。

And titanium dioxide is a promising nonhazardous potential method in organic waste water treat catalyst in application for its high catalysis ac tivity and chemical stability.

TiO2因具有相对高的催化活性、化学稳定性和无毒无害而成为当前应用最有潜力的一种光催化剂。

The development of a new kind of radioactive drug includes the research work in its technological process, quality requirements, preclinicopharmacological study and clinical study, The research unit, when designing the technological process for a new drug, muststudy the physical and chemical properties, purity (including pureness of radionuclide), testing method, pharmacology, toxicity, nuclein animal dynamics, radiospecific activity, dosage, pharmaceutical forms and stability of that radioactive drug.

研制单位在制订新药工艺路线的同时，必须研究该药的理化性能、纯度及检验方法、药理、毒理、动物药代动力学、放射性比活度、剂量、剂型、稳定性等。

The empirical rule governing the position of double bonds in olefinic acids was referred to by analyzing electron impact spectra of the chemical products modified by 2-amino-2-methylpropanol of the fatty acids. This method provides a new technical tool for analyzing fine structures of unsaturated fatty acids.

通过解析不饱和脂肪酸2-氨基－2-甲基丙醇化学修饰产物的EI质谱图，得到了不饱和脂肪酸中碳碳双键的定位规则，从而为分析不饱和脂肪酸精细结构提供了手段。

Gelatin submicron particles were prepared by emulsion chemical cross-linking method using gelatin as core material and paraffine as oil phase.

以A型明胶为原料，石蜡油为油相，采用乳化化学交联方法制备了明胶亚微米粒子。

The Chemical constituents in Dicranopteirs pedata were extracted by ultrasound-assisted solvent and preliminary separated by sub-step extraction method, and each group was analyzed by the thin layer chromatography.

采用超声辅助溶剂提取和分步萃取法对新鲜芒萁的化学成分进行提取和初步分离，采用薄层层析法对各个组分进行分析。

Based on the analysis of chemical composition,mineral composition and the spectral absorption characteristics of different lithostratigraphic units,the Relative Absorption BandDepthand the bandsratio method were adopted to process ASTER VisibleNear Infraredand ShortwaveInfraredmultispectral data from the east Kalpin Uplift,southwest Tian Shan. Limestone,dolomite,sandstone,blueschist/greenschist and psammitic schist/pelitic schist,in the study area were well discriminated.

基于新疆天山西南缘柯坪隆起东部不同地层单元岩石的化学组成和矿物成份以及VNIRSWIR谱域光谱吸收特征的分析，我们采用相关吸收波段深度和波段比值方法对研究区的多光谱遥感数据进行图像处理，有效区分和识别了白云岩、石灰岩、砂岩以及阿克苏群的蓝片岩—绿片岩和砂质片岩。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。