酸值

Addition of ZnO is favorable to the growth of crystallites of zinc ferrite product and the decrease of reaction threshold in the equimolar reactant of ZnO+Fe〓O〓.

在等摩尔比的反应物中加过量的ZnO有利于的铁酸锌产物的进一步结晶长大，并可以降低反应阈值。

Wood CTMP was bleached with formamidine sulphinic acid.

本文用甲脒亚磺酸漂白CTMP浆，通过药液 pH值变化及漂白效果探讨FAS的溶解性、稳定性。

The appropriate addition of formic acid (0.1 mol/L) into test solution was 10 mL.

通过加入甲酸作为焦性没食子酸试液的抗氧化保护剂，解决了由于试样的氧化而导致测定值不稳定的问题。

The statistically designed experiment studied the effects of six factors,i.e.,grainsize,mode of the generation of airbubbles,pH value of the pulp,acid treat-ment,quantity of the frother used,andtemperature of the pulp.

本文尝试用统计分析的方法，综合研究了影响黑钨矿浮选的六个主要工艺因素：(1)粒度；(2)浮选气泡产生方式；(3)矿浆pH值；(4)起泡剂用量；(5)矿物是否预先经酸处理；(6)矿浆温度。

Objective］ The aim was to study the effects of pH value on adsorption of basic resin on fumaric acid.

［目的］研究pH值对碱性树脂吸附富马酸的影响。

The total yield of glucuronic acid and glucuronolactone reached 60% at optimum conditions, and the catalyst had good selectivity.

在Pd负载量为1%、温度70 ℃、pH值为9的条件下，葡萄糖醛酸及内酯的总收率达到60%，反应选择性良好。

Stability of electrodeposition liquid, the physical and chemical resistance properties of the film depend on amine value, kinds of glycidic ester used, GA content and the amount of blocked polyisocyanate used.

结果表明，环氧基在固化过程中会参与交联反应，电泳液的稳定性、涂膜的物理性能和耐化学品性能由胺值、缩水甘油酯单体种类、丙烯酸缩水甘油酯含量和封闭型多异氰酸酯用量等因素决定。

The diluent solution of glyoxylic acid and oxalic acid was used as the separation object.TOA (in n-octanol) was used as the solvent. The extraction characteristics of single acid and two-acid solution were studied,and the influence of pH and the concentration of complexing agent on the distribution coefficients were measured. The suitable mathematic models were proposed to describe the relationship between TOA and carboxylic acid based on assumed extraction reaction in organic phase.

摘 要：以草酸和乙醛酸的稀溶液为分离对象，采用三辛胺为萃取反应剂、正辛醇为稀释剂，研究了单溶质、双溶质有机酸的萃取分离特性，测定了溶液pH值、萃取反应剂的浓度等因素对双溶质有机酸萃取的影响，提出了萃取的化学反应发生在有机相中的假定，建立了TOA萃取草酸的数学模型。

The diluent solution of glyoxylic acid and oxalic acid was used as the separation object. TOA (in n-octanol) was used as the solvent. The extraction characteristics of single acid and two-acid solution were studied, and the influence of pH arid the concentration of complexing agent on the distribution coefficients were measured. The suitable mathematic models were proposed to describe the relationship between TOA and carboxylic acid based on assumed extraction reaction in organic phase.

以草酸和乙醛酸的稀溶液为分离对象，采用三辛胺为萃取反应剂、正辛醇为稀释剂，研究了单溶质、双溶质有机酸的萃取分离特性，测定了溶液pH值、萃取反应剂的浓度等因素对双溶质有机酸萃取的影响，提出了萃取的化学反应发生在有机相中的假定，建立了TOA萃取草酸的数学模型。

Glyoxylic acid was prepared by reaction of sodium hydroxide surplus with methyl dichloroacetate in methanol solution via neutralization of filtrate with 50 percentage sulfuric acid to pH 2～3 and hydrolyzation after separation of salts.

二氯乙酸甲酯和过量的氢氧化钠在甲醇溶液中反应，滤出氯化钠后，直接加入适量的 5 0 %的硫酸调 pH值为 2～ 3，滤出硫酸钠，蒸馏回收甲醇，水解、浓缩，得到不含乙二醛的 4 0 %乙醛酸溶液。

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。