Naphthalene was used as internal standard substance in the analysis method. ResultsThe standard curve of bornyl acetate was linear over the range of 0.109 6～1.753 6 μg,r=0.999 6.The mean recovery of bornyl acetate was 101.33％,RSD=1.79%.

結(jié)果在該色譜條件下，乙酸龍腦酯在進樣量0.109 6～1.753 6 μg范圍內(nèi)呈良好線性關(guān)系日韩精品黄色网站，r=0.999 6aⅴ色五月；乙酸龍腦酯的加樣回收率為101.33％，RSD=1.79%国产人人靠人人靠。

Our main products include 5-Methyl-2-pyrazinecarboxylic acid series, Guanine series, Folic acid series, Methyl Cyanoacetate and Ethyl cyanoacetate series, we also have made great contribution in the development of cardiovascular drug, stomach drug, anti-inflammatory drug and antidepressants, such as Nizatidine, Acipimox, Glipizide, Zaltoprofen and Pregabalin, which have been put into production on large scare.

公司主要產(chǎn)品有5-甲基吡嗪-2-羧酸系列欧美妇人成熟A片免费观看，鳥嘌呤系列，葉酸日韩福利免费网站观看网址视频大全，氰乙酸甲酯自慰女生在线观看，氰乙酸乙酯系列，在心血管藥国产色无码视频免费、胃藥欧美一级日韩片、消炎藥、抗抑郁藥等新品開發(fā)上有重大建樹日本黄a网站，先后研制成功18禁止网站。，形成批量生產(chǎn)，如尼扎替丁人人操操操操操操、阿西莫斯精品国产无码在线观看、格列吡嗪、扎托洛芬黄色操逼免费网站、普瑞巴林国产内射xx在线，同時具備為客戶定制化學(xué)品的能力。

The catalytic activity of iodine in the esterification reaction was studied by synthesis cyclohexyl acetate from acetic anhydride,cyclohexano and acetic acid,cyclohexano.

以單質(zhì)碘為催化劑美女裸无遮挡免费网站A片，通過乙酸酐一级毛片免费看全过程、環(huán)己醇及乙酸、環(huán)己醇為原料合成乙酸環(huán)己酯欧美黄免色，對碘的催化活性進行了研究欧美黄色淫荡人妻。

This paper introduced a new preparative method of sodium diacetate within one step and the mate technique of SSDA .

本文采用一步法合成雙乙酸鈉，介紹了增效雙乙酸鈉的復(fù)配工藝18岁亚洲美女搞黄，同時測試其防霉效果亚洲国产日韩在线一区。

A new technology process of sodium diacetate production with glacial acetic acid and sodium carbonate in one reactor.

研究了以冰醋酸和碳酸鈉一步合成雙乙酸鈉的工藝和反應(yīng)設(shè)備，使雙乙酸鈉生產(chǎn)工藝更為簡單合理谁有国产A片网站，經(jīng)濟易行又粗又长水又多免费视频，而且產(chǎn)率達 97%以

Sodium Diacetate and Sodium Dehydroacetate are two new-model preservatives.

雙乙酸鈉和脫氫乙酸鈉為兩種新型的防腐防霉劑。

In order to investigate the mechanism for this reac-tion, methyl α-bromoacetate or ethyl α-bromoacetate as starting material was added to the solution of phenyl selenoamide in ethanol in 1∶1 or 2∶1 molar ratio under the neutral condition at room temperature. The results indicated that the same product bis or bis diselenide was formed. Byproduct ethyl benzoate was also separated.

為了研究該反應(yīng)機理黄p网站免费网站在线，選擇α-溴代乙酸甲酯或α-溴代乙酸乙酯在無催化劑欧美极品视频、中性條件下国内精品视频_区二区，乙醇溶液中與苯基硒代酰胺室溫下反應(yīng)，投料比為1∶1和2∶1曰批A片，結(jié)果也都生成了同一類產(chǎn)物二甲氧羰基甲基二硒醚或二乙氧羰基甲基二硒醚黑人巨大精品欧美在线观看，同時還分離得到了相應(yīng)的副產(chǎn)物苯甲酸乙酯。

In order to investigate the mechanism for this reaction, methyl α-bromoacetate or ethyl α-bromoacetate as starting material was added to the solution of phenyl selenoamide in ethanol in 1:1 or 2:1 molar ratio under the neutral condition at room temperature. The results indicated that the same product bis or bis diselenide was formed. Byproduct ethyl benzoate was also separated.

為了研究該反應(yīng)機理欧美福利网址，選擇α-溴代乙酸甲酯或α-溴代乙酸乙酯在無催化劑jizzcom、中性條件下，乙醇溶液中與苯基硒代酰胺室溫下反應(yīng)男人扒开女人的腿桶到爽视频，投料比為1：1和2：1日本特级黄大片一区二区三区，結(jié)果也都生成了同一類產(chǎn)物二甲氧羰基甲基二硒醚或二乙氧羰基甲基二硒醚，同時還分離得到了相應(yīng)的副產(chǎn)物苯甲酸乙酯亚洲黄色免费在线。

It showed that the yield of hydroxyacetic acid reached above 99.5%, the extracting efficiency was over 97%,and the product with purity of more than 96% was obtained. Extractant and solvent also can be reused.

實驗結(jié)果表明：羥基乙酸合成的反應(yīng)產(chǎn)率達99.5%以上性色作爱视频，羥基乙酸萃取率達97%以上，最終收率達96%自拍日韩动漫欧美视频网站，萃取劑與溶劑均可循環(huán)使用a黄色视频在线观看免费。

The optimum reaction conditions of the synthesis of isoamyl acetate with Nafion NR50 resin membrane as catalyst were studied.

以全氟磺酸樹脂膜為催化劑得到冰乙酸和異戊醇反應(yīng)合成乙酸異戊酣適宜的反應(yīng)條件。