杂多的

The detection limit for molybdate and tungstate was 3. 55 and 5. 03 fi...

应用于钼、钨、硅杂多酸中钼和钨的测定，结果满意。

3Effects of different kinds of catalysts with Keggin structure on nitration of toluene were studied.

3研究了不同种类Keggin型杂多酸对甲苯硝化反应选择性的影响。

So supported heteropoly acids is a new,very functional catalyst with potence in chemical technics.

因而固载杂多酸催化剂是化学工业中很有潜力的一种新型多功能催化剂。

When adding a certain concentration of stannous chloride reductant, it will change into a blue complex.

在酸性条件下，正磷酸盐与一定浓度的钼酸铵反应，生成磷钼杂多酸。

Results showed that SiW(11) heteropolyanion had some suppressive effect on the silicotie toxicity of quartz.

结果表明：SiW（11）杂多阴离子对石英的致硅肺作用有一定抑制效果。

Copper ions greatly enhanced the sensitivity of the determination of molybdenum, which based on the color charge transfer complex of molybdotungstophosphate-3,3",5,5"-tetramethylbenzidine, in the presence of poly vinyl alcohol.

提出了一种基于铜离子增敏形成磷钼钨杂多酸-3，3'，5，5'-四甲基联苯胺电荷转移复合物测定痕量钼的方法。

Determination of Phosphate, Chloride and Sulfate in Heteropoly Acid by Zwitterion Eluent

杂多酸是一种理想的催化剂载体［1，2］。

Then the catalysts of high activities were selected to be used in the preparation of mixed dibasic acid dimethyl esters.Mixed dibasic acids are byproducts of hexanedioic acid. In this article DBE were synthesized.

己二酸生产过程中副产大量的混合二元酸，本文选用DBA和甲醇为原料，分别采用磷钨杂多酸、PW_(12)/C和PW_(12)/SiO_2为催化剂，合成了绿色环保高沸DBE。

The synthesis methods of ethyl lactate catalyzed by P-toluene sulfonic acid, cationic exchange resin, ferric chloride hexahydrate, stannous chloride, Aluminium chloride, modified zirconium oxid, ferric-potassium vitriol, ammonium ferric sulfate dodecahydrate, rave earth sulfate, sodium bisulfate monohydrate, complex solid superacid, heteropoly acid, molecular sieve, ionic liquid and lipase etal.

评述了对甲苯磺酸，阳离子交换树脂，六水三氧化铁，氯化亚锡，三氯化铭，改性氧化锆，铁钾矾，十二水合硫酸铁铵，稀土硫酸盐，一水硫酸氢钠，复合固体超强酸，杂多酸，分子筛，离子液体和脂肪酶等催化剂催化合成乳酸乙酯的合成方法。

Diethyl glutarate was synthesized using glutaric anhydride and ethanol, which were separated from dicarboxylic acid, as raw material, heteropoly acid as catalyst.

以从二羧酸中分离出的戊二酸酐和乙醇为原料，用杂多酸为催化剂，合成了戊二酸二乙酯。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷