测定

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。

Different samples' absorbent was determined in the condition of different colorimetric time ,different samples' temperature and different freshness,it prove that the result was relative to different experiment conditions in order to master the key point and ensuer the accuracy of the result in experiment.

啤酒双乙酰的含量是啤酒质量评价中的一项非常重要的指标，通过对不同样品在不同的比色时间、不同的样品温度及新鲜程度条件下测定其吸光度，得出不同实验条件对测定结果的影响，以求在实验中掌握好其关键点，确保测定结果的准确性。

The hypercholesterolemic rats were selected to imitate early stage of human atherosclerosis The effects and mechanism of n-3 PUFA on endothelium were investigated with the following parameters: the morphological appearance and arrangement of endothelium stained by Ag, in vitro endothelium-dependentrelaxation of aortic ring, endothelial permeability test using Even′s Blue, blood lipid and body weight in one-week intervals, excitative and emissive spectrum of RBC membrane labeled by DPH (1, 6-Diphenyl-1, 3, 5-hexatriene), fluidity of RBC membrane, plasma and RBC membrane LPO

在整体和离体水平，选用大鼠高脂血症模型模拟动脉粥样硬化早期状况。用114只大鼠多指标着重研究n-3多不饱和脂肪酸在高脂血症状态下对内皮的保护作用，以探讨其预防动脉粥样硬化的机理。所采用指标包括：浸银法观察内皮细胞排列与形态；离体血管环观察内皮依赖性舒张；伊文氏蓝染料法观察内皮通透性。为探讨作用机理，进行了血脂和体重的动态监测、DPH(1，6-二苯基-1，3，5，乙三烯)标记红细胞膜的荧光光谱测定、红细胞膜流动性测定、血浆和红细胞膜脂质过氧化物测定。

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。

Reproducibility, recovery rate, filate range, interference of haematolysis and lipaemia were evaluated by NCCLC system, and then the results were compared.

用钒酸氧化法、改良J—G法和胆红素氧化酶法测定血清中的总胆红素，按NCCLC评价方案系统评价其重复性、回收率、线形范围及溶血、脂血对胆红素测定的干扰影响，然后对测定结果进行比较。

The growth of H. fusiformis was determined by weighting the fresh algae every two days and the photosynthetic oxygen evolution was assayed by a Clark-type oxygen electrode. To determine the contents of chlorophyll a and UV-absorbing compounds, methanol extracts from H. fusiformis were scanned from 250 to 750 nm. The concentration of chlorophyll a was calculated using the equation of Porra and the contents of UVAC per fresh mass were estimated by determining the ratio of UVAC to chlorophyll a according to Dunlap et al and multiplying the ratio of chlorophyll a content to fresh weight of the sample used.

羊栖菜的生长是通过每两天测量一次藻体的湿重来测定的，光合放氧是用Clark型氧电极测定的，为了测定藻体叶绿素a和紫外吸收物质的含量，从250 nm到750 nm对羊栖菜的甲醇提取液进行扫描，叶绿素a的浓度用Porra的公式计算，紫外吸收物质的计算是根据Dunlap的方法先计算紫外吸收物质和叶绿素a的比率，然后乘以每单位藻体叶绿素a的含量。

It is a organic hexahydric weak acid. In different acidity, the dissociation degree and the color of reagent solvent were different also. Determined and draw the absorption curve of reagent in varies acidity, and figured out the dissociation constant by Perisic-Janjic method; the complex ratio of the reagent and bismuth was determinated by mole ratio method and continuous variation method; The apparent stability constant of the complex was calculated, the mechanism of dissociation and coordination were discussed.

2，6—二溴4—硝基偶氮氟胂是本实验室合成的测定铋的一个较好的试剂，对其进行了进一步的研究，在用柱层析法对其进行了提纯后，测定了试剂在不同酸华东师范大学硕：l：学位论文摘要度下的吸光度和最大吸收波长，绘制了其吸收曲线，用Perisic一Janjic法计算了试剂的六级离解常数；用摩尔比法和连续变化法测定了试剂与秘形成的配合物的络合比：计算了配合物的表观稳定常数，研究了其离解和配合机理，为筛选高效有机显色剂提供了理论依据。

Immunohistochemistry technology was used to evaluated tyrosine hydroxylase of DA synthesis. DA, 5-hydroxytryptophan(5-HT) and their respective metabolic products 3,4 -dihydroxyphenylacetic, homovanillic are also precisely quantified in this research by using high-pressure liquid chromatography with electrochemical detector. The main metabolism monoamine oxidase of DA was processed too. RESULTS:WD can increase the synthesis and the metabolism process of DA .

本文观察了温胆汤及其配伍对大鼠刻板行为的影响，采用了免疫组化技术对多巴胺的合成酶—酪氨酸羟化酶进行了含量测定，应用高效液相-电化学法测定了DA、5-羟色胺（5-HT）及代谢产物3，4—二羟基苯乙酸、高香草酸的含量，并测定了DA主要降解酶—单胺氧化酶。

Mensurate the coal samples f efficient of Panyi coalmine of three work faces of Huainan, the natural the percent of containing of water, the surface tension of seven surfactants in different concentration and set up Hydrophile property platform of experiment in searching the capillary effect, which giving a complete set of mensurating of Hydrophile property.

通过对淮南潘一矿三个工作面的煤样分别进行了煤的f系数的测定，煤的自然含水率的测定，七种表面活性剂在不同质量浓度时表面张力大小的测定，以及通过搭建亲水性实验平台，研究煤体在不同表面活性剂中的亲水性大小。

METHODS: D-galactose (1 000 mg·k-1·d-1 ) was injected into mice hypodermically for 8 weeks to induce aging animal model, and Vit-E (100 mg·kg-1; 250 mg·kg-1) was administered for 6 weeks by ig at the 3rd week of making model. After Vit-E treatment for 8 weeks, water maze test was used to determine the ability of mice's learning and memory. The activities of glutathione peroxidase and succinate dehydrogenase, the content of nitric oxide and activity of nitric oxide synthase in the brain tissue were detected separately.

小鼠连续皮下注射D-半乳糖（1 000 mg·k-1·d-1）8周制备衰老模型，并于第3周开始给予维生素E（100 mg· kg-1；250 mg· kg-1）处理；8周后采用水迷宫测定小鼠学习记忆能力，并取脑组织测定谷胱甘肽过氧化物酶和琥珀酸脱氢酶活性，测定一氧化氮含量和一氧化氮合酶活性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。