查询词典 acetic aldehyde

In acetic acid and using cobaltous acetate as catalyst m-chlorobenzoic acid was synthesized by the reaction of m-chlorotoluene with oxygen.

在醋酸溶液中，醋酸钴为催化剂，以间氯甲苯、氧气为原料合成间氯苯甲酸，分别研究了反应温度、反应时间、原料配比、催化剂的用量等条件对合成反应的影响，确定了最佳工艺条件。

Methods: Coloclysis the rats with 10% acetic acid solution to create acute colonitis model, after 24 hours, inject 2.5% Evan blue saline solution into the tail veins of the rats. Then, by detecting the photo-absorption rate of the EB in the tissues of the different zones of forepaws to indirectly examine the changes of blood contents in the different areas.

给予大鼠10%乙酸溶液灌肠复制急性肠损伤模型，24 h后从尾静脉注射2.5% Evans blue生理盐水溶液，通过测量前爪不同区域内EB的吸光度值大小，间接了解左右前爪各区域血含量的变化情况。

Methods The rat's colonitis was induced by 8% acetic acid.Twenty hours later,the rats were given the medicine and the hair color and stool had been observing for two weeks.

8%的醋酸灌肠大鼠建立溃疡性结肠炎动物模型，24 h后给药，连续14天，观察大鼠毛色、粪便、体重变化情况。

A simple and sensitive method was investigated for simultaneous determination six organic acids in wine (tatartic acid, citric acid, malic acid, formic acid, acetic acid and succinic acid) by single ion-exclusion chromatography with conductometric detection.

用单柱离子排斥色谱法分离结合电导检测同时测定了多种有机酸（酒石酸、柠檬酸、苹果酸、甲酸、乙酸和琥珀酸）。

Methods: The methods of the increase of blood capillary permeability of the abdominal in mice induced by injection of acetic acid and the swelling of the ear in mice caused by crotin were used for antiinflammatory experiments, aspirin and hydrocortison were respectively used as the positive control;...

小鼠随机分组，抗炎实验用醋酸诱发小鼠腹腔毛细血管通透性增高和用巴豆油诱发小鼠耳肿胀，阳性对照分别为阿斯匹林组和氢化可的松组；镇痛实验采用醋酸诱发小鼠腹痛和用热板诱发小鼠足痛，阳性对照为盐酸吗啡组。

Distillation device was slightly improved,analyzed by carbon dioxide and determined by water for the analysis of acetic acid from cuprammonia ,with recovery of 97%.

用蒸馏法测定醋酸铜氨液中醋酸的分析方法，操作简单，终点明显，但是在测定过程中二氧化碳对测定结果有很大影响。

Taking 4-bromobenzaldehyde, acetic, benzaldehyde and ammonium acetate as major raw material, the 4, 5-bis(4-bromophenyl)-2-phenyl-1H-imidazole was synthesized by means of catalysis, oxidation and Debus cycloaddition reaction.

以对溴苯甲醛为原料通过催化，氧化生成1，2-二（4'-溴苯基）乙二酮，再以其与苯甲醛、醋酸胺和醋酸通过德布斯法合成2-苯基－4，5-二（4'-溴基苯基）咪唑。

Sodium diacetate,which is the molecular composite of sodium acetate and acetic acid,is a new type of multifunctional addition agent in foods and forages.

双乙酸钠是乙酸钠与乙酸分子的复合物，是一种新型的多功能食品及饲料添加剂。

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钠一步合成双乙酸钠的工艺和反应设备，使双乙酸钠生产工艺更为简单合理，经济易行，而且产率达 97%以

A new method for preparing sodium diacetate by one step reaction based on acetic acid and sodium carbonate was studied.

介绍了以醋酸和纯碱为原料，不加任何溶剂，采用一步法合成新型防腐剂双乙酸钠的新工艺，确定了最佳工艺条件：n：n为(4.0～4.2)：1；反应温度60～70℃；反应时间120～180min；醋酸加料时间40～60min，所得产品质量合格，收率可达96％以上。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。