磺酸

Corrosion rates of iron in sulfamic acid are smaller than those in H_2SO_4,but larger than those in H_3PO_4 or HCl.

在低浓度(0.5～2.0N)范围内，铁在氨基磺酸溶液中的腐蚀速率仅仅比在硫酸溶液中低，而比在磷酸和盐酸溶液中都要高。

A kind of superplasticizer of sulfamic acid series is a new superplasticizer with good prospect, which can provide concrete high flowability good durability and low slump loss.

氨基磺酸系高效减水剂具有对水泥粒子的高度分散性，减水率高，混凝土的耐久性好，并具有控制坍落度损失的功能，是很有发展前途的一种新型高效减水剂。

It is reviewed that sulfamic acid can be utilized as a green catalyst in many important organic reactions such as esterification and transesterification,group protection,imino-Diels-Alder,rearrangement,substitution and condensation.

综述了近年来氨基磺酸作为一种绿色催化剂在有机合成中的应用，主要包括酯化与酯交换、基团保护、氮杂Diels-Alder、重排、取代及缩合等反应。

Digestion conditions, working conditions of atomic fluorescence spectrometer and conditions of hydride generation reaction were studied. Methods for the reduction from Se to Se by using boiling water bath and UV were compared. The amount of sulfamic acid for the elimination of the interference of nitrogen oxides was also investigated.

探讨了消解条件、原子荧光光度计工作条件及氢化物发生反应条件，对比沸水浴加热和紫外光加热2种将Se还原为Se的方法，研究氨基磺酸消除氮氧化物干扰的最佳条件。

Ammonium tristyrylphenol polyoxyethylene ether sulfate was synthesized from tristyrylphenol polyoxyethy-lene ether and sulfamic acid using urea as catalyst.

以三苯乙烯基苯酚聚氧乙烯醚和氨基磺酸为原料，合成了三苯乙烯基苯酚聚氧乙烯醚硫酸酯铵盐。

Superplasticizer ; Sulfamic acid ; Water-reducing rate ; Paste flowability ; Slump of concrete ; Slump loss

高效减水剂；氨基磺酸；减水率；净浆流动度；混凝土坍落度；坍落度损失

Keywords acylhydrazone;sulfamic acid;N-aminophthalimide;fine chemical intermediate

酰腙； 氨基磺酸； N-氨基邻苯二甲酰亚胺；精细化工中间体

The experiment shows that the two substances, zinc and sulfaminic acid, can reduce the nitrate to gaseous nitrogen, so is the nitrate removed.

试验表明，用锌和氨基磺酸两种物质与之反应生成氮气，达到去除硝酸盐的目的。

Hollow fiber membrane extraction is more advantageous in environmental treatment through removal of sulfanilic acid from wastewater.

通过去除水中对氨基苯磺酸的实验表明，中空纤维膜萃取在治理染料中间体废水方面具有非常明显的优势。

The surface of natural scale graphite was modified by wet chemical method using sulfanilic acid and sodium nitrite as raw materials,which could remarkably elevate the hydrophilicity of natural scale graphite.

以对氨基苯磺酸、亚硝酸钠为原料，对天然石墨鳞片表面进行了接枝改性处理，显著提高了天然石墨鳞片的亲水性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。