查询词典 optimum conditions

A purification method —wiped film molecular distillationis introduced in this paper;the optimum technical conditions for refining vitamin E by using this method was studied.

本文介绍了短程蒸馏技术提纯天然维生素E的工艺过程，系统研究了短程蒸馏的系统压力、蒸馏温度、刮膜器转速及进料速率等操作因素对天然维生素E含量的影响。

In this paper, taking the reliabilities of constraints into the modified constraint conditions, optimum design of object function was carried.

在优化设计的平台上，综合考虑每一约束的可靠性，产生通过可靠性设计后的改性约束条件，再在众多的改性约束条件的前提下，进行目标函数的优化设计。

Experiments were carried out on gibberellic acid fermentation conditions with its optimum medium formula.

筛选出赤霉酸产生菌UF456的发酵培养基配方，研究了各种碳源、氮源、碳氮比和不同微量元素对赤霉酸发酵的影响。

The optimum technical conditions were obtained as follows: the experimental drift tube at a temperature of 90 ℃, mobile phase of acetonitrile∶ water=70∶30, flow rate as 1 mL/min, nitrogen flow rate as 2.0 L/min, and a good separation of glucose and xylose in the hydrolysate.

实验条件优化得出在漂移管温度为90 ℃，流动相为乙腈∶水（70∶30），流速为1 mL/min，氮气流速为2.0 L/min条件下，经Shodex Asahipak NH2P-50(4.6 m×250 mm，5 μm)色谱柱后，可以将水解液中的主要糖成分葡萄糖和木糖进行良好的分离。

The optimum fermentation conditions for HA07009 were initial pH7.0, seed age 48h, 8% inoculation amount, and the size 75 ml in 250ml Erlenmeyer flask at 200r/min, 6d.

发酵培养条件为：初始PH7.0，种龄48h，接种量8%，摇床转速为200r/min，250ml三角瓶装液量75ml，发酵培养时间6d。

The optimum inoculation conditions for HA07037 were initial pH7.0, seed cultural time 48h, 10% inoculation amount, and the size 75ml in 250ml Erlenmeyer flask at 200r/min, 6d.

发酵培养条件为：初始pH7.0，种龄48h，接种量10%，摇床转速为200r/min，250ml三角瓶装液量75ml，发酵培养时间6d。

Conditions affecting the polymerization were studied and the optimum condition was given. The Polymer-coated microdisk electrode showed a good Nernst response to pH in the range of 2.5～11. The results of pH determinaton in real samples were also satisfactory.

制得的聚苯胺修饰微盘电极对pH有能斯特响应，稳定性好，用于酸碱滴定和天然水测定结果满意。

The main research work of this dissertation is as follows: Based on the chemical reaction engineering theory and the nitrobenzene electroreduction mechanism, the plate and frame electrolyzer was designed and applied to the process of electroreduction nitrobenzene to p-aminophenol. This dissertation measured the residence time distribution data of the electrolyzer by means of the pulse response method and studied the rule of flow pattern along with the current capacity change. Under different conditions ,this dissertation studied the cyclic voltammetry properties of nitrobenzene on different electrodes by means of the dynamic cyclic voltammetry method and the electrode materials applied to the NB electroreduction have been selected primarily.Baseed on the results of cyclic voltammetry tests, this dissertation used p-electrode systems to measure the steady-state- polarization curves of nitrobenzene on different electrodes in H-type diaphragm cell, and obtained each primary factor s influence rule and the exchange current density value of each electrode.And then on the basis of the conclusions of fundamental researchs upword, the effects of influence factors on the the yield of p-aminophenol and the current efficiency,such as electrode material, current density, quantity of electricity circulated, nitrobenzene concentration . sulpuric acid concentration and so on, have been studied in detail in the systems of hign temperature , strong acidity and oxygen-poorthrough a series of electrolysis experiments in this paper.After all using Pb as anode Monel metal as cathode Dupont Nafion 417 cation-exchange membrane as membrane, this dissertation obtained the optimum technological condition: reaction temperature about 85C, current density 500A m-2, sulphuric acid concentration 20%wt.

论文的主要研究工作为：运用化学反应工程理论，结合硝基苯的电还原机理，设计出用于硝基苯直接电还原合成对氨基苯酚实验的板框式电解槽，并利用脉冲响应法测定了该板框式电解槽的停留时间分布数据，研究了流型随流量变化的规律；通过动态循环伏安法研究了硝基苯在不同电极上、不同条件下的循环伏安特性，初步评选出了用于硝基苯电还原的电极材料；结合循环伏安的测定结果，在H型隔膜电解槽中采用三电极体系测定了硝基苯在不同电极上、不同条件下的稳态极化曲线，得到了各主要因素的影响规律及硝基苯在各个电极上电还原的交换电流密度数值；在基础研究结论指导下，采用板框式电解槽，在高温、强酸、贫氧系统中，进行了一系列的电解实验，分别考察了电极材料、电流密度、通电量、硝基苯浓度、硫酸浓度等因素对收率及电流效率的影响，最终选择以蒙乃尔合金电极作为阴极、铅合金为阳极、Dupont Nofion 417阳离子交换膜为隔膜，得到由硝基苯直接电还原制对氨基苯酚的最佳电解工艺条件：反应温度85℃，电流密度500A·m~(-2)，硫酸浓度20％wt。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。