乙酸

The esterification of acetic acid and n amyl alcohol by using heteropoly acid as catalyst was studied.

乙酸正戊酯[1]是一种无色透明的液体，可用作喷漆的溶剂和稀释剂，也用作香料和化妆品的原料以及木材粘合剂的溶剂。

The main groups from PCR-RFLP analysis were identified by 16S rDNA gene sequence phylogenetic analysis.16 species were obtained, they were: Bacillus cereus、Mycoplana bullata 、Acinetobacter calcoaceticus 、Acinetobacter baumannii 、Chryseobacterium indolthetium、Acidovorax avenae、Pantoea ananas、Pantoea agglomerans、Pantoea dispersa、Pantoea spp.、Enterobacter cowanii、Sphingobacterium multivorum、Pseudomonas putida、Pseudomonas fulva、Pseudomonas parafulva and Pseudomonas spp., respectively.

通过16S rDNA 序列系统发育分析，5 个菌株分别被鉴定为蜡状芽孢杆菌、乙酸不动杆菌、成团肠杆菌、恶臭假单胞杆菌、成团泛菌属，作为内生细菌存在于油菜体内属首次报道。

The preparation of anisaldehyde by ozonolysis reaction from anethole was studied.

以茴香脑为原料，乙酸和环己烷的混合物做溶剂，臭氧化法制备茴香醛。

The yield of the 3, 4-dihydropyrimidine-2(1H)-one was up to 95.4% under mole ratio of anisaldehyde, methyl acetoactate and urea is 1:2:5, ion-exchange membrane is 3 g, ethyl alcohol as solvent and refluxing for 2 h.

当对羟基苯甲醛、乙酰乙酸甲酯与脲的摩尔比为1：2：5，乙醇作溶剂，3 g离子交换膜，回流2 h，产物收率达95.4%。

UV 254nm, 366nm and anisaldehyde as a chromogenic agent were used for detecting compounds of these strains. Results indicate that the metabolites of these strains were the most abundant when these strains were fermented in No.1 and No.4 media, and only few in No.2 and No.3. Metabolites of each strain were different in different media.

实验结果表明，用1号和4号培养基发酵产生的次生代谢产物的种类最丰富，2号和3号培养基产生的较少；用II号展层系统(氯仿∶甲醇=4∶1)和III号展层系统(正丁醇∶乙酸∶水=4∶1∶5)作TLC层析，检测到的产物最多；3种检测方法以茴香醛检测到的代谢产物最丰富。

Methoxycarbonyl-4-(4-methoxyphenyl )-6-methyl-3, 4-dihydropyrimidine-2(1H)-one was synthesized from anisaldehyde, methyl acetoactate and urea in presence of HF-1O1 strong acidic ion-exchange membrane.

在HF-101强酸性离子交换膜的存在下，由对羟基苯甲醛、乙酰乙酸甲酯与脲一步合成了5－甲氧羰基－4－（4－甲氧苯基）－6－甲基－3，4－二氢嘧啶－2(1H)－酮。

The annulation of stilbene compounds were studied. Phenanthrene derivates-interme diates of tylophorine were synthesized by annulation from-2,3-bis(3,4-dimethoxyphen yl)acrylic acid and-2,3-bis(3,4-dimethoxyphenyl) acrylonitrile with phenyliodine diace tate as a friendly and high efficient catalyzer.The route was first reported, whose application foreground would be promising.The catalyzer will be used to study of synthesi- zing a series of new phenanthrenes.

本文还探索了简单类化合物关环反应，并研究出用廉价高效对环境友好的催化剂-二乙酸碘苯成功地将类化合物－3，4-二甲氧基-α-(3，4-二甲氧苯基)-肉桂酸和-2-(3，4-二甲氧苯基)-3-(3，4-二甲氧苯基)-丙烯关环形成相应的菲环衍生物－娃儿藤碱重要中间体，此方法在国内尚属首次，具有重要的应用价值，此外可用此催化剂研究一系列类化合物的关环反应。

Results The extract of Huanglian Xiangru Decoction with different proportions of herbs could inhibit pathological changes in lung of mice caused by FM1 strain of Influenzavirus A and lower lung index, indicating anti-influenza activities in vivo with antifebrile effects on febrile rats caused by yeast, resistance to acute inflammation of auricular swelling of mice caused by paraxylene, decreasing writhing times of mice caused by glacial acetic acid, and increasing pain threshold of mice caused by hot plate.

结果 不同比例的黄连香薷饮提取物可明显抑制甲Ⅰ型流感病毒FM1株引起的小鼠肺部病变、降低肺指数，有体内抗流感病毒作用，对酵母所致发热大鼠有退热作用，对二甲苯所致小鼠耳廓肿胀有抗急性炎症的作用，有减少冰乙酸致小鼠疼痛扭体次数和提高热板致痛小鼠痛阈值的作用。

The invention provides an acetate type antiphlogistic medicine, in particular the oral medication composition of ketorolac comprising a core, pharmaceutical film (including medicament, adhesive and cracking layer) protecting layer, and a casing foil.

本发明提供含乙酸类非甾体消炎药、特别是酮咯酸的口服药物组合物。该药物组合物包括核、药物层(含有药物、粘合剂、及崩解剂)、保护层、及肠溶衣层。

Glucose, formic acid and levulinic acid were not detected in the liquors of acid hydrolysis and the concentration of xylose and arabinose was high, while the acetic acid was low. The mixture of monosaccharides and fatty acid was efficiently separated and the whole process of separation was finished within 23 minutes.

通过对样品的分析表明，麦糟水解液中不含有葡萄糖、甲酸及乙酰丙酸，木糖和阿拉伯糖的质量浓度比较高，乙酸的质量浓度比较低，单糖及脂肪酸的混合液得到很好的分离，分离过程在23min内完成。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。