查询词典 acetic

For the synthesis of NHC precursors, there are also several routes: condensation of glyoxal, amines and paraformaldehyde; alkylation of imidazole or monosubstituted imidazole with alkyl halide; annulation of ortho esters and 1,2-diamines; ring closure of hydrazines or amides with acetic anhydride; reduction of thiones with Na/K in THF.

关于N-杂环卡宾前体的合成途径主要有：乙二醛、伯胺和多聚甲醛的缩合反应；卤代烷与咪唑及其取代咪唑的烷基化反应；原甲酸酯与1，2-二胺的成环反应；肼或酰胺与酸酐的环化反应；用Na/K对环硫脲化合物的还原反应。

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。

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。

The influence of hydrolysis time、temperature、acid concentration and solid to liquid ratio on xylose、 arabinose and acetic acid concentration are assessed by single factor.

单因素法考察了水解时间、温度、酸浓度以及料液比对木糖、阿拉伯糖、乙酸浓度的影响，并用均匀设计法优化了麦糟水解条件，确定了水解的最佳工艺条件100.4mgH2SO4/g干麦糟，温度138℃，料液比1∶6，时间270min。

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.

目前，国内外用高效液相色谱法测定糖类化合物已有许多报道[4-10]，但同时分析单糖及脂肪酸的报道仅在Solang等[3]的研究中略有叙述。

Methods: Oncomelania hupensis was immersed in different concentrations of extracts from Sarcotesta of Ginkgo biloba by benzinum, acetic ether or absolute alcohol. Molluscidal effects were observed at 24,48,72,96 h, and compared with those of extracts from sarcotesta of Ginkgo biloba combined with arecoline.

将经石油醚、乙酸乙酯和无水乙醇提取的银杏外种皮提取物稀释成不同浓度，用浸杀法观察24，48，72，96 h的杀螺效果；并与槟榔碱水提物联合用药的杀螺效果进行比较。

RESULTS Asarum and A V compound has remarkable analgestic effect of pain in mice induced by acetic acid and hot plate.

结果 细辛及A V复方制剂对醋酸致小鼠腹痛、热板法致小鼠足痛均有明显的镇痛作用并能抑制蟾蜍坐骨神经动作电位的传导。verapamil有弱的镇痛作用，无坐骨神经动作电位阻滞作用。

Ti-Si composite materials are mixed at atomic scale, and Ti-O-Si bond appears in all of the samples with different TiO2 content; the mixed oxides are mainly existed in the form of amorphous pattern, anatase appears when the TiO2 content is more than 80%, but compared with the intension of pure TiO2, it has not integrate structure. The acetic content has great influence in the specific area and crystal structure of the mixed oxides. 20TiSi has good heat stability, still possesses 11m2/g after calcined at 1100℃; calcinations on the large scale of temperature does not cause the break of Ti-O-Si bond, TiO2 is well dispersed in 20TiSi calcined at 1100℃, and it still existed in the form of amorphous.

结果表明：制得的Ti-Si复合氧化物具有很高的比表面积，在TiO_2含量为10％时达到681.5m~2／g，Ti原子进入Si-O四面体结构中，形成Si-O-Ti键，复合氧化物的稳定性好，当TiO_2含量低于60 wt％时，以无定型形式存在；当含量为80％时，出现锐钛矿型TiO_2，但与纯TiO_2相比晶型不完整：醋酸对Ti-Si复合氧化物的比表面积、晶型都有很大的影响；TiO_2含量为20％的20TiSi经1100℃高温焙烧后，仍有较高的比表面积(11m~2／g)，稳定性好，在较宽的温度范围内焙烧，没有引起Ti-O-Si键的断裂，分散度高，没有出现晶型TiO_2。

Aureomycin on reduction with zinc-acetic acid gives desdimethylaminoaureomycin under mild conditions and desdimethylaminodesoxyaureomycin under more drastic conditions.

金霉素在冰醋酸与甲醇溶液中，用锌粉氢解，在温和条件下，产生脱二甲胺金霉素；较剧烈条件下，则生成脱二甲胺脱羟金霉素。

It is also shown that the solubility of solids of benzoic acid and 1-naphthalene-acetic acid increases with increase in pressure.

在相同的温度、压力下，苯甲酸的溶解度比苯乙酸大很多，理论分析认为，这是由于苯甲酸的极性较萘乙酸的强所致。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。