测定法

A novel method for determination of benzoyl peroxide with spectrophotometry was developed. Inclusion ratio of β cyclodextrin to dibenzoy peroxide and benzoic acid is obtained with spectrophotometry.The mechanism of the inclusion was studied,too. The results showed that β-CD react with dibenzoyl peroxide to form a 1:1 or 2:1 host-guest complex, with the apparent formation constants of 5.0× 10~2and 2.5× 10~4 , respectively.β-CD reacts with benzoic acid to form a 1:1 host-guest complex with the apparent formation constant of 6.9 × 10~2 after the dibenzoyl peroxide was reduced by hydroxyl ammonium chloride.

建立了用β环糊精测定过氧化苯甲酰的分光光度法，并测定了β环糊精与过氧化苯甲酰和苯甲酸的包结比，随着β-CD浓度的增大，可与BPO分别形成1：1或2：1的包容络合物，包结常数分别为5.0×10~2和2.5×10~4，与苯甲酸形成1：1的包容络合物，包结常数为6.9×10~2；由于包结物的吸光度值比过氧化苯甲酰的吸光度值大大增加，建立了一种当β-CD存在下，在水溶液中测定过氧化苯甲酰的方法。

An optimum condition for analysis of p-fluorobenzaldehyde sample using electrosynthesis was investigated by method of hydroxyamine hydrochloride .

制定了盐酸羟胺法测定电合成芳醛的条件，并用该方法测定了电合成对氟苯甲醛样品，方法的回收率为99.97%～100.4%，相对标准偏差为0.084%～0.42%，测定结果和气相色谱分析结果基本一致。

A method for the determination of ferrum content in cobalt based alloy dust by Air-C 2 H 2 flame atomic absorption spectrophotometry was set up.

建立了一种用空气-乙炔火焰原子吸收法测定钴基合金喷粉中铁含量的分析方法，探讨了硅对铁测定的干扰机理，对用氯化钙作为硅干扰铁测定的释放剂进行了试验。

The paper studied the assay of copper in the mixture of gold and copper with iodometric method , and the practice.

研究了采用碘量法快速测定混合金铜精粉中的铜量，并应用于实践，测定结果令人满意，可在1h内完成分析测定。

In this article, three kinds of prealloy powder were developed by water atomization method. The base attribute, pattern, phase composition, differential thermal analysis of powder were researched. Sintered density, hardness, bend strength, Young's modulus were researched as hot pressed sintering temperature changing. By using abrasive wearing equipment upbuilt by the authors, the wear resistance were determined. Green-pressing density, simulated green-pressing strength and bonding momental of high frequency brazing were assayed. SEM corrosion structure and SEM appearance of fracture were observed.

本文采用水雾化法开发了三种预合金代钴粉末：对粉末的基本属性、形貌，粉末的相组成，粉末的差热性进行了分析研究；测定了它们的烧结密度、硬度、抗弯强度、弹性模量随热压烧结温度变化的规律；采用作者自行建立的磨料磨损试验方法，测定了它们的质量磨损百分率；测定了它们的冷压生坯密度、模拟生坯强度以及高频钎焊的结合力矩；观察了热压烧结SEM腐蚀组织和SEM断口形貌。

Objective: To measure the variation and significance of respiratory impedance and pulmonary ventilation function in patients with bronchial asthma by impulse oscillometry before or after the bronchial provocation test, investigate the relationship between the IOS method and bronchial provocation test, and evaluate the clinical significance in bronchial asthma by IOS method.

目的：应用脉冲振荡法测定支气管哮喘患者在支气管激发试验前后的呼吸阻抗及肺通气功能参数的变化规律和临床意义，探讨IOS测定方法能否作为支气管激发试验的判断方法以及IOS测定参数在哮喘诊断中的价值。

The principle and method of determining starch content in corn and other food with polarimetric method were introduced.

本文介绍了旋光法测定玉米粉及粮食中淀粉含量的原理和方法，通过对玉米等 9种粮食样品测定结果分析，结果表明该法与传统的酶水解法、酸水解法测定的结果基本一致，且具有操作简便、快速、结果可靠的特点。

Study on adsorption in porous media of reservoir is very important for phase equilibrium calculation of condensate gas and the right way of insight at the gas or condensate gas reservoir.In this paper,experiments for measuring absolute adsorption of N2, CO2 and natural gas on 8 different artificial cores using an accurate porosimeter and an precise chromatographic instrument under room temperature (283～292°K) and low pressure (0.167～0.3MPa) have been studied.From these experiments,the following results can be obtained:i.

利用高精度孔隙度测定仪和气相色谱分析仪，采用恒体积法，测定了室温(283～292K)、低压(0.167～0.3MPa)下N2、CO2和天然气在8个不同的岩心孔隙内表面的吸附量，对于天然气，还测定了吸附前后自由气体的摩尔组成，被吸附气体的摩尔组成和天然气各组分的相对吸附量。

Stem and Dongmu-70 rye grass (Secale cereale L.) stem. The diameter, length, weight and linear density of stem were measured after sample collection. Shearing force was measured. Meanwhile, the content of moisture were measured, neutral detergent fiber acid detergent fiber lignin, cellulose and hemicellulose were measured. Three Xiaowei sheep were used to determine in situ degradability in 48 h of DM and NDF of alfalfa stem and rye grass stem.

采集2种牧草后，测定茎直径、长度、重量和线性密度，测定剪切力、中性洗涤纤维、酸性洗涤纤维、木质素、纤维素及半纤维素含量，用尼龙袋法测定干物质、中性洗涤纤维48h瘤胃降解率，比较各项指标随茎直径变化的规律，探讨剪切力与各项指标之间的相关性。

In order to adapt the vegetables variety many, the content low and so on the characteristic, this article studied in the atomic fluorescence spectrographic methods determination vegetables the cadmium method, the result has been satisfied.

就是下面这段：近年来已发表了许多测定镉的论文，由于测定原理不同，灵敏度也各不相同。为了适应蔬菜品种多，含量低等特点，本文研究了原子荧光光谱法测定蔬菜中镉的方法，结果满意。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。