查询词典 salt acid

The results indicate that different molecular weight of dextran could be obtained by direct fermentation,and the acid hydrolyzing in the old technology be avoided.The yield reached the maximum by controlling the pH value to be 8.0,and the inorganic salt could promote the growth of the Leuconostoc mesenteriodes with the effect of promotion being Mn2++Ca2+＞Mn2+＞Ca2+.

结果表明：通过定向发酵技术可得到符合要求的不同分子量的右旋糖酐，避免了老工艺中酸水解工艺；控制发酵培养基pH值为8.0，可使产率最大；无机盐离子Mn2+和Ca2+能促进L.M菌的生长，其促进菌生长的程度大小依次为：Mn2++Ca2+＞Mn2+＞Ca2+。

A salt or ester of maleic acid .

雷酸形成的一种盐或酯。

A salt of manganic acid containing manganese as its anion.

锰酸形成的一种盐，含有锰作为其阴离子。

Main compositions: Quaternary ammonium salt, ahurian Angelica Root, menthone and Tannic Acid.

主要成份：季铵盐、白芷、薄荷酮及鞣酸等，内含天然渗透性因子。

The optimum conditions for making microspheres were obtained via orthogonal experiment with adsorptive capacity as the index as follows: the mass fraction of water phase is 2%(ratio between starch and β-cyclodextrin is 1:2), 110 mL oil, 3.3 g Span60, 6.6 g Tween60, 15 mL water, 18 mL assistant surfactant, 0.07 g metaphosphoric acid trisodium salt. The microspheres were characterized by microscope and the average particle size is about 329.3 nm with productive rate of 41%.

结果表明，质量分数为2%的可溶性淀粉与β-环糊精溶液为水相（二者的质量比为1：2），油相用量为110 mL，水相用量为15 mL，乳化剂Span60用量为3.3 g，Tween60用量为6.6 g，助乳化剂用量为18 mL，三偏磷酸钠用量为0.07 g，制备得到的复合纳米微球在扫描电子显微镜下，微球大小分布均匀，所得纳米微球产率为41%，平均粒径为329.3 nm。

The starch-cyclodextrin microspheres were prepared by using starch/β-cyclodextrin as raw material, normal hexane as dispersed phase, Span60 and Tween60 as emulsifying, pentanol as assistant of emulsifying, and metaphosphoric acid trisodium salt as linking agent.

纳米微球以可溶性淀粉和β-环糊精为原料，选用正己烷为油相，Span60和Tween60为乳化剂，正戊醇为助乳化剂，三偏磷酸钠为交联剂，以对亚甲基蓝的去除率为指标进行了单因素和正交试验。

The process was methanolysis ed alkyl inino-acetic acid ester hydrogen chloride salt from methyl-cyanide.

研究了由乙腈为原料经烷基亚氨基醋酸酯盐酸盐醇解制备原乙酸三甲酯的工艺方法，对投料比、反应温度、反应时间及中和指示剂等工艺条件进行了研究，得出较优惠的工艺条件。

A new water-blocking swellable particle with good temperature-tolerance and salt-tolerance was synthesized from acrylamide and 2-acrylamido -2 - methylpropane sulfonic acid , by means of aqueous solution polymerization.

水膨体是近年来中外广泛研究应用的一种调剖堵水剂，但由于陆上油田注水开发地层的复杂性，对其性能的要求也越来越高。

The method is characterized in that:(1) the reflux of the 2-[N, N- 2amino]-3-cyano-group-4-thiopheneacetic-5-carboxylic acid tetra ester is carried out in the proper sodium hydroxide aqueous solution of alcohol for 5h to 6h and the pH value is kept over 10 during hydrolysis;(2) the ethanol of 20 per cent to 60 per cent is added and then the strontium chloride aqueous solution with 2times to 2.5times molal weight is directly added, precipitates the crystal, is filtered and dried;(3) water is added to carry out the reflux and the little salt packed in the crude product is removed, and the product is collected through heat filtration.

其特征在于：①将2--3-氰基-4-羧甲基噻吩-5-羧酸四酯在适量氢氧化钠水醇溶液中回流5～6小时，水解过程保持pH值10以上；②然后再加入20-60％乙醇，随后直接加入2-2.5倍摩尔量氯化锶水溶液，析出结晶，过滤，晾干；③加水回流，除去粗品中包裹少量盐，热过滤，收集产品。

Key words: monoammonium phosphate; neutralized slurry concentration process; purifying phosphoric acid; the process of fertilizer integrated with salt; equipment

磷酸一铵；中和料浆浓缩法；净化磷酸；肥盐结合工艺；装备

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。