酸值

The results of research on the factors affecting titanium tannage show that high concentration NaCl medium has larger negative effect on titanium tannage. When the NaCl concentration exceeds 5%, the titanium tanning action is reduced rapiddly. Traditional NaCl pickling is unsuitable for titanium tannage, tanning in water medium directly, the best tanning effect can be obtained, so titanium tanning can not only eliminate chrome pollution, but also diminish salt pollution. The optimum tanning conditions for HPZ-Ti tan liquor are pH3. 5, TiO〓 offer of 7. 5%(based on the weight of 65% moisture pelt), the best Bascity of tan liquor is between 30% and 50%.

以HPZ—Ti鞣液为基础，研究了不同鞣制介质，鞣制pH值，鞣剂用量和浓度，鞣液的碱度，不同提碱剂，不同的预处理和后处理等因素对钛鞣的影响，结果表明：高浓度的NaCl溶液介质对钛鞣有很大的负面作用，当介质NaCl浓度超过5%，革内钛的结合量和革的Ts明显降低，传统的高浓度NaCl浸酸工艺不适合于钛鞣，在水介质中直接鞣制效果最好，所以钛鞣不仅消除了铬污染而且大大降低了盐的污染。

Using thymol -sodium hypobromite as chromogenic reagent,and extracting the colour formed with butanol,a spectrophotometric method for the determination of arginine in fermentation broth was studied.

以百里酚的次溴酸钠溶液为显色剂，用正丁醇萃取显色产物，以分光光度计比色测定有机相的吸光度值。

Among 66 objects, 10 had pulmonary infection, they had higher gastric pH value or toke antacids.

随访66例研究对象中，10例有肺部感染，他们胃内pH值较高或服用了抑酸药物。

The different factors'n (V / n molar ratio, precipitation pH and calcination temperature effects on the characterization of FeVO4 were discussed and the optimum preparation conditions of triclinic FeVO4 was concluded.

以硝酸铁和偏钒酸铵为原料，在不同n/n摩尔比，不同pH值和不同温度条件下制备了系列样品，优化了三斜型FeVO4的工艺制备条件。

Spinulosa turion was not affected by heavy metal Pb in sediment.

Pb对刺苦草能量代谢的影响反应在腺普酸库和能荷值的降低。

The labor cost to manufacture a given part or to perform a service depends on the number of work hours and the wage rate.

其电离酸溶液开始的pH值在很大程度上取决于电离度，其滴定曲线也非常清晰。

An attempt was made to apply the method of statistical analysis to research in the flotation of wolframite.

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。

N-substituted pyrroles are synthesized by reacting acetonylacetone with carbamic ester , catalysted by p-toluenyl sulfonic acid, heated at reflux temperature for 6h, collecting evolved water, giving to 75% yields, which is 26% more than the literature value.

以对甲苯磺酸为催化剂，用甲苯作溶剂，使2，5-己二酮与氨基甲酸酯在110℃反应6h，合成了5种氮取代吡咯衍生物，其中两种未见文献报道，反应产率均达到75％以上，比文献值高出了26％。

Sulphoaluminate alite cements were successfully prepared from fly ash, bauxite and CaF2 as a fluxing agent by designing MG and MS values, i. e., the controlling of CaO and CaSO4 content, and the sintering at 1150℃, 1200℃, 1250℃, 1300℃ and 1350℃ respectively.

以粉煤灰为主要原料，CaF2为矿化剂，设计MG和MS值，控制CaO和CaSO4含量，分别在1150、1200、1250、1300和1350℃温度下烧制高胶凝性硫铝酸钙－阿利特复合矿相水泥熟料。

Using EDTA as titratant,murexide as indicator,sodium tartrate ammonium fluoride and sodium thiosulfate as masking agent, nickle concentration was determined in ammonic medium.

以EDTA为滴定剂，紫脲酸铵为指示剂，NH4F、酒石酸钾钠、Na2S2O3为掩蔽剂，在氨性介质中测定镍的浓度；在pH值为8.0的氨-氯化铵缓冲液中，采用滴定比色法测得钴的浓度。

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。