等浓度

In this paper, a quaternary ammonium salt of chitosan was synthesized and the factors affect on the solubility or degree of substitution of product, such as the concentration of alkali, the time of basification, the content of water in system, the time of dispersing and the method of adding epoxyproryltrimethylammonium chloride, were discussed in detail. The product was characterized by IR, DSC, TG and X-RAY diffraction. The effects of time, humidity and temperature on the gases permeability of the quaternary ammonium salt of chitosan film were researched.

本论文研究了壳聚糖季铵盐的合成反应，对碱化浓度、碱化时间、水的含量、分散时间和醚化剂的加入方式等因素对制备反应的影响进行了考察；应用红外光谱、DSC、TG以及X-射线衍射对产物进行了表征；探讨了时间、湿度和温度对壳聚糖季铵盐膜透气性的影响。

Benzonitrile was selectively hydrogenated into benzylamine under mild conditions over activated amorphous nickel aluminium alloy catalyst which was prepared by rapidly quenching method.

由铜鼓快速淬冷法制备的非晶态NiAl合金催化剂经活化后用于催化苯甲腈加氢制苄胺的反应，考察了溶剂种类、苯甲腈初始浓度、催化剂用量、反应温度及反应压力等因素的影响，并测定了该催化加氢反应的表观活化能。

Synthesis process of benzophenone hydrazone is studied with benzophenone and 80%hydrazine as raw materials.

研究了以二苯甲酮和80%水合肼为原料，合成二苯甲酮腙的工艺，探讨了物料配比、反应时间、浓度等对目的产物收率的影响。

In subsequent experiments, the antioxidant enzyme activities of superoxide dismustase, catalase and glutathione peroxidase in juvenile goldfish exposed to single compound and equitoxic binary mixtures of 2-chlorophenol and 2, 4-dichlorophenol were investigated. Finally, the relationship between lethal doses and effective concentrations in the experiments are discussed.

第二部分通过系统研究氯酚类化合物单一化合物和等毒性二元混合物暴露对鲤科金鱼幼鱼的急性联合毒性作用方式和肝脏组织内三种细胞抗氧化酶(SOD， CAT和GSH-Px)的活性变化，探讨了水生生物急性致死剂量与效应浓度之间在数值上可能存在的相关性。

In this paper, the importance of denitrification in the biogeochemical cycle of nitrogen in estuaries is summarized, It introduces methods of denitrification determination, as well as their advantages and disadvantages.

本文综述了河口区域反硝化作用在N元素生物地球化学循环过程中的重要作用，概述了不同测定反硝化速率的方法，并提出了各种方法的优缺点。总结了反硝化作用的影响因素：O2浓度，NO3，有机质，温度，生物等。

The treatment of hydrogen sulfide odor of petrochemical enterprise using bleaching powder was studied primarily in this experiment which including bleaching powder adding amount,hydrogen sulfide concentration,odor flux,absorption-oxidation temperature,and so on.

实验采用填料吸收塔对漂白粉用于石化企业硫化氢恶臭的治理进行了初步研究，系统研究了漂白粉投加量、硫化氢浓度、进气流量、吸收氧化温度、液气比等因素对处理效果的影响。

The results showed that the suitable temperature for spore germination was 25℃, 2% glucose and Bonar's culture solution obviously increased the germination rate of spores.

对大秃马勃Calvatia gigantea和脱皮马勃Lasiosphaera fenzlii的孢子萌发进行了不同温度、不同营养物及浓度和光照等条件对其孢子萌发影响的研究。

Discussion and Conclusion: Our walking exercise program can decrease the resting dyspnea, improve breathing patterns and improve exercise capacity. Supplementing oxygen during walking may not result in a further improvement.

讨论及结论：对中重度慢性阻塞性肺疾病患而言，在肺功能受损且改善有限的情形下，适当的运动介入仍能有助於增进运动能力，改善其动态之呼吸形式及呼吸困难的困扰，至於氧气辅助的附加效益，是否受限於介入的方式、浓度或时机等因素，仍须更进一步的研究。

Methods Potential related risk factors of ROP, such as age, sex, birth weight, FiO 2, duration of inspiring ox ygen, hyaline membrane dzsease, Apgar score, intracranial hemorrhage , recurrent apnea, broncho pulmonary dysplasia, patent ductus arteriosus were studied prospectively by univariate analysis and Logistic regression a nalysis in 135 preterm infants.

方法以 13 5例早产儿患儿为研究对象，对胎龄、性别、出生体重、吸氧时间、吸氧浓度、肺透明膜病、Apgar评分、颅内出血、支气管肺发育不良、反复呼吸暂停、动脉导管开放、眼底等进行检查。同时用单因素χ2 检验和多因素logistic回归分析筛选和判定早产儿ROP发生的危险因素。

The effects of reactant concentration, reaction temperature, pH value, additive and calcine on TiO2 crystalline size and morphology were discussed.

重点研究了反应物浓度、温度、pH值、添加剂和煅烧等条件对产物形貌和尺寸的影响。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！