磺酸

The preparation methods of sulfonated coal and factors such as sulfonation time, sulfonation temperature and ratio of acid to coal etc.

试验研究了褐煤制磺化煤的制备方法及磺化温度、磺化时间、酸煤比等因素对产物磺化煤的离子交换活性的影响。

The reaction of calcium L-threonate with hydrogen bromide in acetic acid readily yields (2S, 3S)-2, 4 -dibromo-3 -hydroxy butanoic acid which was further converted into methyl (2s, 3S)-2,4-dibromo-3-hydroxybutanoate by treatment of methanol.

在化合物12上引入氨基甲酰基可用二氯磷异氰酸酯、氯乙酰异氰酸酯或氯磺酰异氰酸酯，随之引入的二氯磷酰基、氯乙酰基或氯磺酰基可分别用碳酸氢钠、N-甲基二硫代氨基甲钠或亚硫酸钠脱去。

The soil pH was found to be the main factor affecting BR formation of 14 C\|metsulfuron methyl among the basic properties of soil.(2)During the whole periods of the incubation,the 14 C\|BR of 14 C\|metsulfuron methyl in soils was mainly distributed in fulvic acid and humin.The relative percentage of 14 C\|BR in fulvic acid was higher than in humin,while the content of the 14 C\|BR distributd in humic acid only account for less than 1% of applied amount.

土壤pH是14 C 甲磺隆在土壤中形成BR的主要影响因子。14 C -甲磺隆在各类土壤中的14 C BR的最大值分别占引入量的 48 5%、46 5%、52 6%、1 9 3 %、49 7%、42 0 %和 46 5%；( 2 )在整个培养试验过程中，14 C 甲磺隆在 7种不同类型土壤中的14 C BR ，主要分布在富啡酸和胡敏素中，前者中的相对百分比大于后者，而在胡敏酸中的相对百分比较小。

After catheter insertion under transoral endoscopic guidance, animals were randomly assigned to one of the four groups: acid reflux (pepsin 0.3 mg/mL + taurodeoxycholic acid 0.155 mg/mL + acid pH 2); nonacid reflux (pepsin + taurodeoxycholic acid + pH 6); saline reflux; and unwounded control.

经口腔内镜引导下插入导管，并随机将兔子分组：酸返流组（胃蛋白酶0.3mg/ml＋牛磺脱氧胆酸0.155mg/ml＋酸pH＝2）；非酸返流组（胃蛋白酶＋牛磺脱氧胆酸＋pH＝6）；生理盐返流组；以及无损伤组。

Zirconium phenyl phosphonate Zr (C6H5PO3) 2nH2O and its derivatives Zr(C6H5PO3)(subscript 2-x)(HPO4)nH2O and Zr (C6H5PO3)(subscript 2-x)-(HPO3)nH2O were synthesized and sulphonated.

合成了苯膦酸锆及其混合配体形式的苯膦酸－磷酸锆和苯膦酸－亚磷酸锆，并通过层间苯环磺化制备了不同组成的磺化苯膦酸－磷酸锆。

Inhibitors are added in the green sand mold to avoid the moisture from reacting with the magnesium melt, resulting in forming magnesia slag and hydrogen formation.

故而本实验将比较使用不同的抑制剂，包括十二烷基磺酸钠、硼酸、硫磺、与氟硼酸钾等对於AZ91镁合金铸件外观之研究。

In this report, we wish to report our results on "sodium p-toluenesulfinate in free radical reactions".

本研究报告是这一年来本实验室在有关对甲苯亚磺酸钠与烯类化合物的自由基反应的研究结果。

The relationship between the rate constant and reaction temperature can be satisfactorily described as Arrhenius law.

在我国，科研工作者也进行了SCWO的相关研究，如研究SCWO处理磺酸萘[2]、含油废水[3]等。

In the presence of aminosulfonic acid catalyst,lactic acid reacted with n butyl alcohol to form n butyl lactate .

以氨基磺酸为催化剂，实现了乳酸与正丁醇反应合成乳酸正丁酯。

The different initiation systems affecting the graft of lignosulfonate with acrylic acid was studied in this paper.

研究了三种常用引发体系对木质素磺酸盐接枝丙烯酸反应的影响；通过比较三种接枝共聚产物的接枝率和阻垢性能，得出选用Fe2+-H2O2为该合成反应的引发体系较优的结论。

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％。