正量

Microcalorimetric measurements of NH~3 adsorption on catalysts reveal that the remarkable strong acidity and catalytic activity of the Al- promoted catalysts are caused by a change of distribution of acid site strengths and an enhancement in the number of strong and intermediate-strong acid sites effective for the n-butane isomerization and benzoylation of toluene.

NH~3吸附微量热结果表明，Al促进样品的强酸性和催化活性的显著提高是由于样品表面的酸位强度分布发生了变化，有利于正丁烷异构化反应和苯甲酰化反应的中强酸位和强酸位的酸量显著增加。

Cancer patients here on Earth who undergo new forms of radiation therapy using protons or carbon ions , said Borak, could also benefit from the dosimeter.

他还说在地球上正接收质子或碳离子新辐射疗法治疗的癌症患者也会从该放射量测定器收益。

In this research, we extracted the genomic DNA from the Buxus sinica var. parvifolia leaves by using the modified CTAB approach and then used as the template DNA. Base on the invariable quantity of TaqDNA, we att empted to establish and optimize ITS-PCR amplification system for Buxus sinica var. parvifolia by employing L9 (3^4) orthogonal design with four factors, i.e. template DNA, Mg(superscript 2+), dNTPs and primer.

本研究利用改良CTAB法从珍珠黄杨叶片中提取基因组DNA作为模板，在TaqDNA聚合酶量不变的基础上，利用正交设计L9(3^4)对4个因素（模板DNA、Mg(上标2+)、dNTP和引物）在3个水平上对珍珠黄杨ITS-PCR反应体系进行优化。

Orthogonality L9(34) methods on the basis of the concentrations of caladium alkali was used to optimize the preparation technology. The final technology was determined as follow:12 times water soaking herbs, volatility oil distilled by vapor 2h, decoction 2 times every 1.5h and 85% alcohol forming granules.

经正交实验四因素三水平L9(34)方法，以西贝碱的含量为检测结果，优选了最佳的提取工艺，确定了用12倍量水浸泡4h，以水蒸汽蒸馏法收集挥发油2h，煎煮1.5h，干膏用85%乙醇制粒的科学工艺。

The quantity ratio of four main esters in Taishan Tequ is reasonable, the content of caproic acid and acetic acid is comparatively higher in Taishan Tequ, the content of n-propanol is also a bit high, and the content of aldehydes is suitable.

泰山特曲具有合理的四大酯量比，己酸、乙酸含量较高，正丙醇含量稍高，适量的醛类物质。

Lipase mediates esterification between caproic acid (0.6mol/L) and ethanol (0.6mol/L) in n-heptane at 40℃. The decrease in caproic acid is measured by titration and 1 unit of lipase synthetic activity is defined as 1 μmol caproic acid consumed per min.

在40℃下，脂肪酶催化己酸(0.6mol/L)与乙醇(0.6mol/L)在正庚烷中进行酯合成反应，通过滴定法测定剩余的己酸，1个脂肪酶有机相合成酶活单位定义为：在测定条件下每分钟消耗1μmol己酸的酶量。

ObjectiveTo develop an extraction process of organic acids from Capsella buras-pastoris by ultrasonic extraction.

方法采用单因素实验/正交实验，研究了温度、超声波作用时间、料液比、超声波功率对荠菜中有机酸提取量的影响规律。

In the paper, some factors influencing the effect of reduction including the anodic material, the cathodal material, the area ratio of cathode to anode and the kind of electrolyte have been investigated and screened out. The result showed that under the same reduction conditions, the reduction of Cr6+ has better effect to use lead-antimony alloy as anode, iron plate as cathode, which area ratio is 7:1 and potassium sulphate as electrolyte.

本文首先对影响电解还原效果的阳极材料、阴极材料、阴阳极面积比和支持电解质加入的种类等因素进行了研究筛选，结果表明：在同样电解还原条件下，实验中阳极采用铅-锑合金，阴极采用铁板，阴阳极面积比取7∶1，支持电解质取为硫酸钾时，具有较好的Cr~(6+)还原效果；同时在采用铅-锑合金作阳极的条件下，通过正交实验，对影响直接在碱性介质中电解还原低浓度含铬废水的其他因素进行了研究，即研究了在电化学还原过程中，Cr~(6+)的初始浓度、极板间距、支持电解质的加入量、搅拌情况等因素对还原效果的影响程度，确定出了主要的影响因素。

Considering pencil of matrices with centrosymmetric could not satisfy characteristic equations in practice, it was necessary to study the centrosymmetric solution of the matrix equation least square problems, and to give pencil of matrices with centrosymmetric of the least squares problems in model updating.

对线性结构的有限元动力模型修正问题，通过灵敏度分析，确定要修正的参数，由正交性条件和特征方程得到相应的修正量方程。

In view of simplifying the calculation, this paper offers the orthogonal projective method of the least square axis for the evaluation of roundness and cylindricity.

从简化计算量的角度出发，提出了评定圆度和圆柱度的最小二乘轴线正交投影法。

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。