查询词典 acetic acid

In the presence of acetic acid and polyethylene glycol, chromic anhydride and acenaphthene react under mild condition and acenaphthene can completely convert into acenaphthenone .

在醋酸、聚乙二醇存在下，铬酸酐和苊在温和的条件下反应，苊可以完全转化为苊酮。

Acenaphthenone was prepared by the oxidation of acenaphthene in the presence of chromic anhydride , acetic acid and polyethylene glycol as a phase transfer catalyst under mild reaction conditions with high yields.

研究了在铬酸酐、冰醋酸和相转移催化剂聚乙二醇存在下苊的氧化反应，较温和的条件可高产率地得到苊酮。

Methods Protein in blood and urine was precipitated directly by acetonitrile with acetanilide was used as the internal standard using Agilent Zorbax SB-Aq column (250 mm×4.6 mm, 5 μm). The mixed solvents of water (triethylamine 0.12%, acetic acid 0.12%) and acetonitrile were used as the mobile phase to separate cephalosporins using gradient elution method at 1 mL/min and 254 nm.

以乙酰苯胺为内标，血液和尿液用乙腈直接沉淀蛋白，采用Agilent Zorbax SB-Aq(250 mm×4.6 mm， 5 μm)色谱柱，流动相选用水（含0.12%三乙胺和0.12%乙酸）和乙腈的混合溶剂梯度洗脱，流速1 mL/min，检测波长254 nm。

The pH, acetic acid, propanoic acid and VFAs were detected, in Selenomonas ruminantium culture fluid at Oh, 6h, 12 h, 24 h, 36 h, after adding yeast. The results indicated that lactate uptake can be stimulated by all of the six yeast strains at all of six concentrations levels.

实验设6个酵母组和一个未添加酵母的对照组，为了检测酵母的最适添加浓度和有效作用时间，将每一个酵母组均设6个浓度水平：2g／L，4g／L，6g／L，8g／L，10g／L，12g／L，并且在实验的0h、6h、12h、24h、36h分别取样，检测培养液的pH值和乙酸、丙酸等挥发性脂肪酸的含量。

We had finished some items such as propanoic acid and acetic acid series antimildew compound. animal and vegctable hydrolyzed protcin. yeastextracts. starch sodium octenylsuccinate. etc.

自成立10年以来，在食品添加剂中开发了丙酸系列、乙酸系列防霉剂，动植物水解蛋白，酵母抽提物，辛烯基琥珀酸淀粉钠等。

The vanillin-perchioric acid was used as the chromogenic agent, and glacial acetic acid was used as solvent system.

选取香草醛－高氯酸作为显色剂，冰醋酸为溶剂。

The results showed that the gibberellic acid in the O. americanus seeds was decreased first and then increased during the cold stratification. The indole-3-acetic acid was not changed obviously at the first 45 days, while after that it was increased gradually.

结果表明：赤霉素的含量先降低后升高；生长素的含量在最初的45天变化不明显，之后逐渐增加；脱落酸的含量逐渐减少。

Result The results indicated that the effects on Qixinghong of gibberellic acid 800 mg/L+spermidine 70 mg/L treatment was obvious, followed with 6benzyladenine 150 mg/L+naphthalene acetic acid 60 mg/L treatment.

结果］结果表明，GA 800 mg/L+Spd 70 mg/L处理七星红山茶的效果较好，BA 150 mg/L+NAA 60 mg/L次之；GA 500 mg/L+BA 120 mg/L处理红芙蓉山茶的效果较好，GA800 mg/L+NAA 80 mg/L对红芙蓉山茶有一定的促进作用。

In the air, formic acid, acetic acid content of the environment, the more its wood products the higher the concentration.

空气中的甲酸，乙酸含量与所在环境有关，木制品越多其浓度越高。

Under the same concentration of organic acids, formic acid demonstrated stronger ability to accelerate fructose decomposition than acetic acid.

在相同浓度有机酸存在时，甲酸对果糖分解反应的促进作用明显大于乙酸。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。