查询词典 Mass

High performance liquid chromatography, carbon-13 nuclea magnetic resonance, chemical ionization mass spectrometry and gas chromatography with flame ionization detection have been employed for the identification and quantitative deter mlnation of the epimers of amygdalin.

高效液相色谱法、carbon-13 nuclea 磁场共振电离质谱、化学品与气相层析法，以氢火焰离子化检测被用来识别和定量的威慑 mlnation差向异构体的苦的。

The yield of iso amyl propionate was up to 91.8% when molar ratio of isoamyl alcohol to propionic acid was 3.0:1, mass ratio of catalyst was 2.5%, and reaction time was 2.0 hs.

在醇酸物质的量比为3.01，催化剂用量为反应物料总质量的2.5%、反应时2.0h，产品收率可达91.8%。

The optimal synthesis conditions are that when the mass ratio of amylum and acrylamide is 3:1; NaOH is 75% of acrylamide; the concentration of ammonium ceric nitrate is 5 mmol/L; the N, N′-methylenebisacrylamide and acrylamide is 0.2%; and the reaction temperature controlled in (60±2)℃, the water absorptivity of produced super absorbent can reach to 750 g/g for tap water.

最佳合成条件是：在淀粉与丙烯酰胺的质量比为3：1、氢氧化钠为丙烯酰胺质量的75%、硝酸铈铵的浓度为5mmol/L、交联剂N，N'-亚甲基双丙烯酰胺与丙烯酰胺的质量比为0.2%、反应温度控制在(60±2)℃的条件下，制得的保水扩蓄剂吸水率可以达到750 g水／g。

Simultaneous Scan-Selected ion monitoring mode is a new improvement method of data acquisition of gas chromatography mass spectrometry. The determination method of alkaloids in tobacco was established by Scan-SIM of GC/MS. Nicotine, nornicotine, anabasine and anatabine were determined with Scan mode, and myosmine, nicotyrine, 2,3'-Bipyridyl and cotinine were determined with SIM mode.

建立了应用气相色谱-质谱全扫描-选择离子监测数据采集方式同时测定烟草中8种含量相差较大的生物碱的方法，采用Scan模式分析烟碱、降烟碱、新烟碱、去氢新烟碱，同时采用SIM模式分析麦斯明、二烯烟碱、2，3′-联吡啶、可铁宁。

The transient natural convection and natural convective heat and mass transfer under constant-flux condition were also studied respectively. In experimental research, the electrochemical method was used to analogize natural convection in a porous enclosure.

在实验研究中，采用电化学方法，在多孔介质封闭腔体的两竖壁间建立浓度梯度和温度梯度，实验测量了腔体内的温度分布和电极间的极限电流，以此确定了总体的传热系数和传质系数。

The article uses the order of magnitude comparison method and method of analogue to analyze the physical attribute of granular sludge and gas-liquid mixing fluid under gravitational field, the triphase flowing space and dynamics conditions in the main reaction zone, especially the granular sludge's space density, fluid state and the mass transfer state of the corresponding fluid.

本文采用数量级比较法和类比法近似分析了重力场下颗粒污泥及气液混合流体的物理属性，利用在主反应区三相的流动空间和动力学条件，尤其是颗粒污泥的空间密度、流态及对应流体的传质状况。

The basic character of a mass spring oscillate in small amplitude and small angle is studded with an analytic method founded on nonlinear dynamics.

以非线性动力学理论为基础，用解析方法分析包括有质弹簧在内的弹性摆小振幅、小摆角的基本运动规律。

The construction principle of analytical balance style instrument about measuring the center of mass on axial direction and the adjustment method of its sensitivity are described.

本文介绍了天平式轴向质心仪的结构原理及其灵敏度的调整方法；说明了构件轴向质心位置的测量方法及其误差分析。

After collection and drying, the product is weighed on an analytical balance and, from the mass and known stoichiometry the original analyte is quantitatively determined.

收集产物并干燥后，用分析天平称重，从重量和已知的化学计量配比可以定量测定原始分析物。

Through the analytical solutions of momentum differential equation for a stream with varying mass, a general characteristic parameter , depending on structure scale and flow parameter, is introduced.

在径向流体分布器的变质量动量方程理论模型的基础上，通过对模型解析解的分析，获得了包括径向分布器结构尺寸和流动参数的特征参数k／C。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。