查询词典 chemical analysis

And if you want to understand the physical and chemical performance of a metal materials clearly, the available way is to carry on the experiment of metallographic analysis.

而要更清楚地了解金属的这些物理化学性能，更有效的方法是从根本上对金属的金相组织进行分析。

It was analyzed by means of metallographical examination, chemical composition analysis and inclusion testing, the results show that the fracture was mainly caused by no-metallic inclusion.

通过对层裂坯料进行宏、微观检验、化学成分和夹杂物分析，认为大颗粒硫化物夹杂及其富集破坏了基体的连续性，是镦制过程中产生裂纹的主要原因。

The reasons of the leakage in water-wall tube were examined by chemical composition analysis, metallographical observation, electron probe and x-ray diffraction.

采用化学成分分析、金相检验、电子探针及x射线物相分析等方法，对某锅炉的异型烟道水冷壁管泄漏进行了测试研究。

Through the chemical composition analysis, metallographical observation, Manson-Haferd parameter extrapolation and thermal-stress calculation, it is found that the failure of conic nozzle was caused mainly by the thermal stress.

通过对一失效的下集气锥形管的金相宏微观检查、Manson Haferd参数估算锥形接管的持久寿命以及热应力的计算，发现锥形接管的失效原因主要是由温差应力所导致。

Soil basic physical and chemical properties and their variability under greenhouse fruit tree cultivation condition were studied by means of indoor analysis and traditional statistical methid.

调查研究了宁夏果树设施栽培土壤的物理和化学性状，并用传统统计方法分析了不同肥力因子的变异特征。

Use the method that the article determines to authority is worth, methylic to synthesis acrylic acid the course of two kinds of chemical industry of armour ester, namely different butene law (I-C4) and propylene law (C3) undertook green spends evaluation and analysis, make clear I-C4 law course more green.

采用本文确定权值的方法，对合成甲基丙烯酸甲酯的两种化工路线，即异丁烯法(i-C4)和丙烯法(C3)进行了绿色度评价和分析，表明i-C4法路线更为绿色。

The study of molecular spectra is an important tool for understandingthe structure of molecules. The exploration of the microcosmos relies on spec-troscope to a great extent. In recent years, profited by the development ofexperimental techniques in high resolution spectroscopy, experimental data onmolecular spectra are more and more precise, so the theoretical analysis ofthem has become an important subject on chemical physics.

对分子光谱的研究一直是人们了解分子结构特性的重要工具，我们对微观世界的探索在很大程度上依靠光谱学，特别是近年来随着光谱技术的不断提高，实验上测得的分子光谱数据已越来越精确，因而对它们的理论分析也就成为化学物理中的一个重要课题。

The cellular structure, chemical characterization of foliar endodermis and element cellular distribution were investigated in Pinus bungeana leaves by the fluorescence microscope, Fourier transform infrared microspectroscopy and energy-dispersive X-ray analysis.

应用荧光显微技术、傅里叶变换显微红外光谱分析、扫描电镜及X-射线能谱微区分析等手段，对白皮松子叶、初生叶及2 a生针叶内皮层细胞径向壁的显微结构特征、化学成分，以及在叶子横切面上Na和Cl的微区分布进行分析。

By means of X-ray diffraction,scanning electron microscope research and analysis of the chemical composition of micro zone,the authors investigated the zeolite ores of zeolite deposits in Huzhen Basin and determined the main mineral composition of zeolite ores,which are made up of clinoptilolite and mordenite .

运用X射线衍射、扫描电镜形貌研究及微区化学成分分析等手段，对浙江省缙云县壶镇盆地及其外围沸石矿床沸石进行系统研究，确定其矿物组成主要为斜发沸石和丝光沸石，二者可单独产出，也可形成混合型矿石。

The present doctoral dissertation was carried out to study the chemical constituents isolated from stems of two medicinal schisandraceous plants.34 compounds were isolated from the ethanol extracts of the stems S.henryi collected in the Jiangxi province by various column chromatographies.27 of them were identified on the basis of spectral analysis.There are 18 lignans,(including 5 dibenzocyclooctadienes,6 aryltetralins,2 tetrahydrofurans,3 diarylbutanes,2 other lignans),3 flavanols,2 glyceroesters,1 naphthoquinone,1 xanthine and 2 steroids,of which 6 compounds were new compounds,and 7 compounds were isolated from this family for the first time.

采用多种色谱技术进行分离纯化，从翼梗五味子藤茎的乙醇提取物中分离到34个化合物，综合运用现代波谱学技术鉴定了27个化合物，包括木脂素类化合物18个(其中联苯环辛烯类木脂素5个，芳基四氢萘类木脂素6个，四氢呋喃类木脂素2个，二芳基丁烷类3个，其他类型木脂素2个)，黄烷醇类化合物3个，甘油酯类化合物2个，萘醌类化合物1个，黄嘌呤类化合物1个，甾体类化合物2个，其中，5个为新化合物，7个为本科首次报道。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。