查询词典 impurity

It is further revealed that all the factors that may affect the synergism of the system, such as molecular structure, crystallization temperature, melting temperature, impurity and poor solvent, would influence the spherulitic morphology of PHA.

系统研究了样品的分子结构、结晶温度、熔融温度、杂质和不良溶剂等对PHA球晶形态的影响，结果表明体系的协同性是形成规整环带的重要原因。

Special considerations necessary for stereochemical impurity inestigations are also discussed.

特别对于光学异构体相关物质的研究也进行了讨论。

The re are many methods to exam special impurity in drugs,including spectroscopy,stratography and multiple techniques.

归纳了药物中特殊杂质检查的多种方法，包括光谱法、色谱法以及联用技术等，为药物中特殊杂质的检查和药品质量控制提供参考。

Now,the method of dynamics is used in normal applications by measuring the sulphation degree of the solid calcium oxide to infer the reaction activity of limestone;but it is not enough on condition of many types of impurity the limestone composition,which has considerable influence on the desulphurization reaction activity of limestone.

目前，国内外主要采用动力学方法，通过测定固态CaO的硫酸盐化程度来推断石灰石的反应活性。但是这在石灰石中含有许多其它杂质成分时是不够全面的，因为这些杂质成分对石灰石的脱硫反应活性影响很大，不能忽视。

It is discussed that how the preparation methods of the catalyst for trichloroethylene by dehydrochlorination from tetrachloroethane ,the reactor materials,ferric chloride,the impurity 1,1,2-trichloroethane and the high boilers contained in raw material tetrachloroethane and the operating conditions influence the catalyst.

探讨了四氯乙烷脱氯化氢制三氯乙烯所用催化剂的制备方法、反应器材质、氯化铁、原料四氯乙烷中的杂质1，1，2-三氯乙烷和高沸物及操作条件对催化剂的影响，从而指导四氯乙烷脱氯化氢制三氯乙烯的工业生产，提高催化剂的效率，延长催化剂的寿命，消除不利的影响因素，提高产品质量，降低生产成本，确保三氯乙烯生产的长期、稳定运行。

EDS and Surface-profile results indicate that the stoichiometries of all the samples approach 2:3 and the thicknesses are over 500nm. XRD results indicate that the major diffraction peaks of the film match those of Bi2Te3.The film growth exhibits preferred orientation at (015) phase and many Bi, impurity peaks are observed. Hall and Seebeck coefficient measurement reveals that all the samples are n-type with the carrier density of 10^23cm^-3 and conductivity of 10^-5Sm^-1 which confirm the samples have nice thermoelectrically properties.

能谱分析和台阶仪测量结果显示本文所制备的薄膜Bi：Te原子比接近2：3，厚度都大于500nm；XRD测量结果显示薄膜的主要衍射峰与Bi2Te3标准衍射峰相同，在（015）晶面上择优选向明显，有少量的Bi、杂质峰存在；霍尔系数测试及Seebeck系数测量结果显示，薄膜都为n型半导体薄膜，载流子浓度量级为10^23cm^-3，电导率量级10^-5Sm^-1，具有良好的电学性能。

The said process can regenerate catalyst continuously or intermittently to maintain the catalytic activity of the alkylating catalyst for long period and has lowest loss of produce in amount and octane number while eliminating the thiofuran sulfur impurity in material.

采用该方法可对催化剂连续或间歇再生，克服烷基化催化剂一般寿命短的缺陷，并且可以长时间维持烷基化催化剂的活性；在脱除原料中噻吩类杂质硫的同时使得产品量损失最小及产品辛烷值损失最少。

In this method, boiling water was used to destroy the substances that induce the decomposition of polyphosphates. In order to remove the impurity, trichloromethane was used as the precipitator.

用沸水破坏使多聚磷酸盐分解的物质，并用三氯甲烷去除水产品中蛋白质等杂质，离子色谱准确测定多聚磷酸盐各组分的量。

Acetonitrile-sodium chloride, trichloromethane and acetone-dichloromethane were used to extract organophosphorous pesticides respectively. Pulsed-flame photometer detector was used to analyze the extraction rate of these three solvents. Flame ionization detector was used to analyze the content of impurity in the samples extracted by those three solvents.

分别采用乙腈－氯化钠法、三氯甲烷法和丙酮－二氯甲烷法提取蔬菜样品中残留的有机磷农药，使用带脉冲式火焰光度检测器的气相色谱法比较了三种提取方法有机磷农药的提取效率，使用带火焰离子检测器的气相色谱法分析了三种提取方法杂质溶出量。

Strained Si PMOSFET with Polycrystalline SiGe gate can enhance its performance for improvement of carrier mobility and turnable threshold voltage without impurity scattering to carrier.

应变Si pMOSFET以多晶SiGe做栅，既能提高空穴的迁移率，又能调节器件阈值电压而不会对载流子引入杂质散射，因而提高了器件性能。

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％。