查询词典 chemical analysis

Many studies paid attention to dissect the genetic bases using different emendatory approaches from phenotypic variation to gene discovery, mainly containing QTL mapping, chemical mutagenesis etc. Especially, QTL analysis was executed for a lot of important quantitative traits.

我们可以沿着由表型变异去发现基因之路，更准确地剖析数量性状的遗传基础；尤其是对作物的许多重要的数量性状进行的QTL研究越来越受到重视。

Differential thermal and thermo gravimetric analysis were used to capture the physical and chemical development of the high performance concrete with temperature.

通过热重分析、电镜扫描和汞压力测孔等方法，对高温过程中高性能混凝土材料的物理化学变化以及由此造成的微观结果变化进行了分析。

In the present work poly is prepared by chemical vapor deposition polymerization from [2.2] paracyclophane. Thermal gravimetrical analysis is used to study the thermal degradation. It is found that the onset of thermal degradation of poly in air is much lower than that in N2 due to the existence of O2 in the air.

用化学气相沉积聚合法制备了聚对亚苯基二亚甲基膜，由傅立叶变换红外光谱图证实了其化学结构采用热重分析研究了PPX的热降解性能，结果表明，在空气氛围中由于氧气的参与，其热稳定性比在N2中差，热氧化降解明显。

Analysis of the spectrum obtained by means of homonuclear H,H-correlation spectroscopy revealed a coupling between the methylene group with a chemical shift of 2.08 ppm and the methylene group at 2.42 ppm as well as the proton at 3.76 ppm, as expected for a glutamic acid moiety.

作为独立的肽中一部分的亮氨酸和亮氨酸基之间的区别可以通过将13C 化学位移和从其它单个氨基酸中获得的化学位移进行对比后得出。

The observation under microscope, the analysis of Au. Ag. Cu. Fe. As content by electron probe and the micrograph of gold grains, confirm that placer gold are natural Au-Ag alloys. The structure and chemical compositions of verge and interior of gold grains differ significantly for large grains but little for small grains and those which intergrow with guartz and limonite.

镜下观察、电子探针分析(Au、Ag、Cu、Fe、As含量)及显微照相等研究，证实了砂金是天然Au-Ag合金，其边部与内部的结构、成分具有不均一性，这在中粗粒金中表现尤为明显，而细粒金及带连生体的金常常不具备这一特点。

Both of the analysis and the measurements showed that the particle zeta potential is close related to chemical properties of ionizable functional groups on particle surface, pH and specific adsorption of anions and cations.

结果表明，颗粒表面ζ电位与颗粒表面离子化官能团的化学性质、天然水pH值和专属吸附的阴阳离子Ca~(2+和PO_4~(3-)有密切关系。

Four alkaloids were isolated from the root of Stephania epigeae H. S. Lo and identified as cycleanine, cepharanthine, 1-curine, and isocorydine, respectively by chemical studies and spectral analysis.

从地不容中分得四种生物硷，根据其理化性质及光谱数据，分别鉴定为轮环藤宁，千金藤素，1-箭毒硷(1-Curine)和异紫堇定硷。

Based on the analysis of kinetical process of CH4 -air oxidation, a numerical modeling of the species concentrations and temperature for CH4 jet diffusion combustion is made using a four-step reduced mechanism and two semi-detailed chemical kinetical reaction mechanismsW mechanism and Y mechansim.

在分析甲烷-空气氧化反应动力学过程的基础上，采用四步简化机理和两种半详细的化学反应动力学机理-W机理和Y机理，对甲烷射流扩散燃烧的组分浓度和温度进行了数值模拟，计算结果与实验结果进行了对比分析。

By chemical treatment of LS, a kind of modified lignosulphonate based plasticizer was obtained. The modification was confirmed to be connected with carboxyl groups through infra-red spectroscopy analysis.

通过化学方法对LS改性，得到了一种接有羧基基团的改性木质素磺酸盐减水剂。

Combined with the observation of the metallograph and analysis of the change of chemical composition of alloys,we can draw the following conclusion:the addition of within the range of 40% once-used cobalt-chromium alloy to casting cobalt-chromium alloy wouldn't affect the quality of restorations,excessive addition of once-used alloy would damaged the microstructure and physical properties.

摘 要：通过比较不同比例的新旧钴铬合金铸造后的抗拉强度、屈服强度、延伸率、硬度等机械性能指标，并结合相应的金相观察及化学成份分析，得出结论：铸造钴铬合金中可加入不超过40％的仅铸造过一次的旧料而不影响合金的主要机械性能，超过这一比例，将影响修复体的质量。

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。