硫酸化

This paper simulates the main component of biomass-eellulose with pledget and the filter paper.

以脱脂棉、滤纸模拟生物质的主要组分之一纤维素，在不同稀硫酸浓度、时间和温度反应参数下，进行纤维素水解糖化试验研究，以还原糖量为指标，考察纤维素糖化最佳反应条件。

Objective To analyze the components of organic acids in the Radix Ranunculi Ternati from different methods. Methods With using 10%H2SO4-CH3OH as methyl esterification solvent, the analysis for organic acids were carried by using GC-MS . Results 46 components were determined.

目的 分析不同提取法提取的猫爪草有机酸部位的成分方法采用离子交换法提取分离水提液和醇提液中的有机酸，以10%硫酸甲醇溶液甲酯化试剂进行甲酯化，用气相色谱-质谱联用技术分析。

The aluminum foils were galvanostatically etched in an aqueous solution of hydrochloric acid, sulfuric acid, sodium dichromate and hydrofluoric acid.

发现硫酸的添加主要是改善了溶液的钝化性能，铬酸酐的添加则不仅改善了溶液的钝化性能，而且减轻了阴极极化。

The conclusion was drawn by the synthesis of molecular sieve: after mixed soluble glass and aluminium sulfate with proper proportion under room temperature, it was stirred stormily to react. And then we mixed with potassium hydroxide solution after filtrating. At last, the molecular sieves of potassium type was synthesized after the mixture reacted in the oven or autoclave for 24 hours. The molecular sieve was remodeled more than twice with ammonium chloride solution that the concentration was 3mol/L and then remodeled twice with the saturated sodium chloride solution. Finally the molecular sieve was changed into the sodium type. It was named W zeolite.

通过对分子筛的合成得到：以泡花碱、硫酸铝为原料，以硅铝比按一定比例于室温下将二者混合，激烈搅拌，抽滤后与氢氧化钾溶液混合放于烘箱或高压釜中高温晶化24小时，晶化后的分子筛为钾型，先后用3mol/L氯化铵溶液和饱和食盐水各对其改型两次以上，最后改为钠型，可制得W型沸石分子筛。

Nitro-4-methylsulfonylbenzoic acid was prepared from 4-toluene sulfonyl chloride by the reaction of Alkylation (in the condition of sodium sulfite and baking soda), Nitrification (in the condition of nitric acid and vitriol) and Oxidation reaction (in the condition of nitric acid and catalyzer).

研究了以对甲苯磺酰氯为起始原料，首先通过亚硫酸钠和碳酸氢钠的水溶液进行烷基化、其次在浓硝酸和浓硫酸加热回流的条件下峭化、最后在浓硝酸和催化剂的条件下进行氧化，3步反应合成了玉米田高效除草剂甲基磺草酮的重要中间体2-硝基－4-甲磺酰基苯甲酸。

The use ofβ-cyclodextrin can make oximation of acetylacetone happened without sulfuric acid and at high temperature.

9使用环糊精催化乙酰丙酮肟化反应，可在不使用硫酸，较高温度下实现乙酰丙酮的肟化反应。

The use ofβ-cyclodextrin can make oximation of acetylacetone happened without sulfuric acid and at high temperature.

使用环糊精催化乙酰丙酮肟化反应，可在不使用硫酸、高温下实现乙酰丙酮的肟化。

No dimorphic (sulfo-esterification and glucuronidization) metabolite of M1 and M2 was found in the biological specimens above from rats.

在以上大鼠生物样品中未发现M1和M2的二相（硫酸酯化和葡萄糖醛酸化）代谢产物。

The n-butyl lactate was synthesied by the esterification of lactic acid and n-butyl alcohol in presence of ammonium ferric sulfate dodecahydrate NH4Fe(SO4)212H2O,and the factor influencing on the yield of reaction were discussed.

摘 要：在十二水合硫酸铁铵催化下，由乳酸和正丁醇发生酯化反应合成了乳酸正丁酯。实验考察了该催化剂催化酯化合成乳酸正丁酯的醇酸比、催化剂用量、反应时间、反应温度诸因素对酯化率的影响。

Estrogen can cause fetal congenital heart defects, large vascular malformation, hydrocephalus, cerebral meningocele, visceral malformations, hydrocephalus, meningeal, bulging, visceral malformations, feminization of male fetus, penile deformity , cervical abnormalities, but also easy to cause miscarriage, stillbirth and ectopic pregnancy.

雌激素可引起胎儿先天性心脏缺陷，大血管畸形，脑积水，脑脊膜膨出，内脏畸形，脑积水，脑脊膜，膨出，内脏畸形，男胎女性化，阴茎畸形，宫颈畸形等，还易引起流产，死胎和异位妊娠。2、黄体酮可使妇胎生殖器男性化，出现阴蒂肥大，阴唇吻合等。3、先锋霉素：可通过胎盘屏障碍进入羊水中，对胎儿的安全性有影响。4、如有子宫收缩可引起先兆流产或先兆早产，应去医院请医生处方遵医嘱应用硫酸舒喘灵等舒缓平滑肌收缩的药物直至子宫收缩停止。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。