浓度测定

The main works of this paper are as follows:(1) The various methods for determining the cryolite ratio of electrolyte were summarized and compared. The phase constituents of aluminium electrolyte system were studied, the various cryolite ratio definitions for this reason were discussed.

本文研究和测定了工业铝生产中与电解质相关的几项重要的物理化学参数，包括铝电解质分子比的测定研究，氧化铝溶解性能的研究及测定，氧化铝浓度的测定及工业铝电解槽氧化铝浓度—槽电阻曲线的绘制，铝在电解质中溶解度的研究及测定。

The minimum oxygen density of liquid vapors of decalin that is extensive used in textile industry in different temperature and density. The effect of different temperature and density to minimum oxygen density is analyzed. The value of experimental determination is compared with theoretical value and the changing regularity of minimum oxygen density is discussed.

2以纺织过程中广泛使用的保护剂十氢萘为例，在不同温度、不同浓度下测定了其液体蒸气的最小氧浓度，分析了温度、浓度对最小氧浓度的影响，并通过理论值与实验测定值的比较，初步探讨了最小氧浓度的变化规律。

In this research, the activities of CWDE were measured by saccharifying according to the theory that red-brown amino compounds were produced when 3, 5-dinitro salicylic acid and aldehyde were heated together. And the testing conditions were made clear. The activity of Cx should be tested with optimal temperature of 50℃, optimal pH of 4.8, incubation time of 30 min, and optimal substrate of 0.6% CMC-Na. Due to the heat-libality, Cx should be sterilized more than 10 min. The testing conditions of the activity ofβ-G were almost the same with Cx except the substrate of 0.5% salicin and the sterilization time of more than 15 min.

主要取得了一下成果：(1)明确了条锈菌细胞壁降解酶活性测定的条件：羧甲基纤维素酶活性的测定条件为50℃，pH4.8，反应时间30min，底物浓度为0.6%羧甲基纤维素钠，以DNS法测定，且失活酶液的灭活时间应大于10min；β-葡萄糖苷酶活性的测定条件为：50℃，pH4.8，反应时间30min，底物浓度为0.5%水杨苷，以DNS法测定，且失活酶液的灭活时间应大于15min；果胶酶活性的测定条件为：50℃，pH4.8，反应时间1h，底物浓度为0.25%果胶，以DNS法测定，且失活酶液的灭活时间应大于10min。

By synthetically analysizing the physical and chemical properties of all components and particle size, the content of F2641 in the JOB-iC is determined by gravimetric analysis after F2641 is seperated from HMX,TATB and PNP through ? alkali reflux. Determination conditions is set as follows the sample is boilingly refluxed for six hour in a constant temperature bath after adding lOOm! 8.0 ?? 0.1% NaOH. The solvent DMF saturated by TATB is used for extracting HMX,F21 and PNP from the sample and TATB is seperated by crucible filter G4. The mass precent of TATB is determined by extraction fractionation. The mass percent of PNP is measured by multiwavlength linear regression ultraviolet spectrophotometry. The testing conditions are set as follows:multiwavlength constitution: X=267nxn, 275nm, 283nm, 29mm, 299nm,the application scope of the Lambert-Beer law: the concentration of PNP is O.005?0.O25mgIml, the concentration of HMX is 0.060.3Omg/ml,absorption coefficents of PNP and HMX are solved by the slope of linear regression curve of absorbency- concentration of standard solution of PNP and HMIX for measuring wavelengthes,on the basis of the Lanibert-Beer law and absorbancy additivity principle, the slope of linear regression curve of A/E(1) and E1 of PNP and HMX solution is regarded as the concentration of PNP in the solution.

根据传爆药中各组分的物理、化学性质及主体炸药的粒度大小，进行综合分析，确定了采用碱回流重量法测定JOB-1C 中F_(2641)的含量，测定条件：加入100ml浓度为8.0±0.1％的氢氧化钠，在恒温水浴中煮沸回流6h；采用溶剂萃取法测定JOB-1C中TATB的含量，选择TATB饱和的二甲基甲酰胺为萃取溶剂，用G4坩埚式过虑器进行萃取分离；采用多波长线性回归紫外分光光度法测定JOB-1C中PNP的含量，通过实验确定了多波长组合：λ=267nm，275nm，283nm，291nm，299nm；朗波—比耳定律的适用范围为PNP浓度：0.005～0.025mg/ml，HMX浓度：0.06～0.30mg/ml；在测定波长下，对PNP、HMX标准溶液的吸光度—浓度进行线性回归，由回归曲线的斜率得出PNP、HMX的吸收系数；根据朗波—比耳定律和吸光度加和性原理，在测定波长下，对PNP、HMX 两组分混合溶液A_i/E_HMX(i与E_PNP(i/E_HMX(i进行线性回归，回归曲线的斜率即为混合溶液中PNP的浓度。

During using anaerobic fermentation slurry as insecticide, there had many problems that are random using, non-strictly prevention and curing time, non-suitable temperature and consistency mixture ratio ctc. In this research, fristly the different mixtures are made according to the different ratio of slurry to additive. Then the insecticidal effects of the mixture are tested in different conditions so as to find the good matches of slurry and additive in laboratory. According to the up result of the good matches extents of mixture, the field experiment is made to test the mixture's insecticidal chraricter and is further found new dosage form which has many good indexes such as good insecticidal effectiveness, little additive dosis ctc. So as to looking for the dosage form's synergism, the significant analysis is done and the characters of the dosages are tested which are ecological and environmental and the new types of dosage are determined. At last, for proving the dosage's field insecticidal potency, the wide field area experiments are done and four new style dosages are triturated which adapt ecological agriculture development. Aadditionally the effective period of the mixtures are tested when other experiments are done.

本文针对厌氧发酵液作为杀虫剂施用时，随用即配和无严格的增效剂种类、喷施时间及温度、浓度配比等现象，首先对各添加剂与厌氧发酵液配成的不同浓度的混和剂在不同条件下进行实验室测试，确定杀虫率高的浓度范围，进一步细化各混和剂浓度范围作田间试验，选出杀虫效果好，添加剂量少等各项指标都好的剂型并进行显著测定，确定出各剂型的增效情况；然后对选出的剂型进行生态和环保特性测定，以便确定新剂型，最后对选定剂型作大区试验来验证田间杀虫药效，最终研制出了4种适合生态农业发展的新型无污染药肥，并对选出的混合剂进行了有效期实验测定。

Objective To establish the UV determination methodology of protein concentration in liver microsomes of Sprague-Dawley rats.

目的 建立Sprague-Dawley大鼠肝微粒体蛋白浓度测定的紫外分光光度检测法。

The uptake of 〓I-OxLDL in adipocytes was determined by gamma ray counter and normalized to protein concentration of each sample, was expressed as nanograms of 〓I-OxLDL uptake per milligram of cell protein. Reverse transcription polymerase chain reaction was used to evaluate PPARγ and CD36 mRNA expressions.

采用酶联免疫吸附法检测血浆IL-6以及脂肪细胞分泌IL-6的水平；采用gamma射线计数仪来检测脂肪细胞对〓I-OxLDL的特异性摄取情况，采用改良Lowry法进行细胞蛋白浓度测定，细胞对〓I-OxLDL的特异性摄取量以ng／mg细胞蛋白表示；采用逆转录聚合酶链式反应来检测PPAR γ和CD36 mRNA在脂肪细胞的表达情况。

Semen analyses and seminal zinc concentration assessments were carried out according to the World Health Organization manual for 458 subfertile men.

根据世界卫生组织精液分析手册，对458名生育力不足男性进行了精液分析测试及精液锌浓度测定。

We do it in humans, and under certain conditions, you can make absolute concentration determinations.

我们在特定条件下进行了人体研究，进行完全的浓度测定。

We do it in humans, and under certainconditions, you can make absolute concentration determinations.

我们在特定条件下进行了人体研究，进行完全的浓度测定。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。