查询词典 acetic acid bacteria

Results: When the proportion of acetic acid and hydrogen peroxide was 2:1,the catalyst sulfuric acid used was in the range of 30～50 g/L,the reaction temperature was 25℃ and the reaction time was 24 h,the product had highest peracetic acid content.

结果，乙酸与过氧化氢质量比为2：1时，催化剂硫酸用量在30g/L~50g/L范围内，反应温度25℃和反应时间24 h综合条件下，产出过氧乙酸含量最高。

This further indicated that when the acetic acid compound existed it could slow the growth rate of the particles of polysilicic acid, but total species distribution and its transformation model of polysilicic acid did not change.

乙酸化合物的存在，能够有效减缓硅酸溶液中聚硅酸颗粒物的生长速度，但聚硅酸的总体形态分布与转化规律的模式并没有因为乙酸的存在而发生根本的改变。

Experimental study on effect of acetic acid and carbonic acid on clay's geotechnical behaviors;2. The source,existing form and equilibrium of carbonic acid in natural water are presented in this article,which points out that alkalinity is determined by double indicator that indicates purply at the first terminal point,while at the second terminal point should use methyl red-bromocresol green mixed indicator.

介绍了天然水体中碳酸的来源、存在形式及平衡关系；指出用&双指示剂&法测定水中碱度的第一终点应显粉紫色，第二终点宜采用甲基红-溴甲酚绿混合指示剂；测定游离二氧化碳要用双样测定并严格控制滴定终点；各种碳酸的含量可与pH值、硬度的测定结果进行校核。

DHCC Constance in the chemistry belongs to the onlighted Cyclopentanoperhydrophenanthrene when it reacted together with the acid Constance it could transform into the fluorescence phenol.we did the flouric determination for the DHCC, in which treated by the ethanol-sulfuric acid or acetic anhydride-methylene chloride-sulfuric acid, acquired standard curve in the 0-40μg/ml presented the liner relet...

DHCC类物质在化学上属于不发光的环戎烷多氢菲类，但与酸性物质一起反应时，可转化为产生荧光的酚类。用乙醇硫—酸或乙酸酐—二氯甲烷—硫酸处理后的DHCC进行荧光检测，获得标准曲线0—40μg/ml范围内呈线性关系，检出的最高灵敏度可达300ng/ml。该方法可用于分离后的DHCC及单一种DHCC代谢物的定性及定量分析。

The results show high selectivity when the temperature is controlled at 50 CC , and the nitrated reaction time is 90 mm, toluene is nitrated by using 95% nitric acid as nitrating reagent at the presence of acetic anhydride, 1.0g silicotungstic acid catalyst is calcinated at 300℃ for 1.5h. The o/p (ratio of ortho to paro isomer of toluene nitration) ratio is 0.89 in product distribution of toluene nitration, lower than 1.67 using sulfonitric acid as catalyst. The yield of products is 91.6%.

结果表明，在醋酐存在条件下，以CCl4为溶剂，以质量分数为95%的硝酸为硝化剂，反应温度控制在50℃，反应60 min， 1.0g经300℃焙烧1.5h后的硅钨酸催化剂，对甲苯表现出强的区城选择性，甲苯硝化产物o/p值（甲苯硝化产物邻位和对位异构体的质量比）达0.89，较硝硫混酸的1.67显著降低，产物收率达到91.6%。

Acid is formed under acidic conditions, it has antibiotic action, weaker than sorbic acid and stronger than acetic acid.

在酸性条件下产生丙酸，具有抗菌作用，比山梨酸弱，比乙酸强。

Hastelloy alloy B-2 was originally developed to resist hydrochloric acid in all concentrations up to the boiling point and is used in many applications involving the production of this acid, as well as acetic acid and other chemicals.

哈氏合金B-2在沸点以下能够抵抗任何浓度的盐酸并可在包括盐酸、醋酸以及别的化学产品中使用，也可以抗硫酸及纯磷酸。

The functions of acetic acid in the acid treatment of sand stones are systematically analyzed in several aspects such as retardation,stability of ferric ions,corrosion inhibition,acid sludge resistence and buffering property etc.

从缓速性、铁离子稳定性、缓蚀性、抗酸渣性及缓冲性几个方面系统分析了乙酸在砂岩酸化中的功能。

Methods Anhydrous acetic acid as solvent, 0.1 mol/L perchloric acid as titrant, crystal violet solution as indicator to establish non-aqueous titrations and ODS column as stationary phase, methanol and a mixture of 0.025 mol/L sodium phosphate monobasic and 0.02 mol/L sodium dedecyl sulfate (80:20) adjusted with phosphoric acid to a pH (4.8±0.1J as mobile phase, 220 nm as detective wavelength to establish HPLC-UV method for determination of piperazinylethylestrone drug substance; FMOC-CL as a derivatization reagent, FD as a detector to establish an HPLC method with derivatization and column switching for determination of piperazinylethylestrone in dog plasma.

分别采用无水冰醋酸为溶剂，0.1mol/L高氯酸为滴定液，结晶紫指示液指示终点的非水滴定法和HPLC-UV法测定哌嗪雌酚酮原料药含量；以FMOC-CL为衍生化试剂，采用柱切换柱前衍生化萤光检测的HPLC法测定狗血浆中哌嗪雌酚酮含量。

The company mainly produces cinnamaldehyde, cinnamic acid, cinnamic alcohol, cinnamic nitriles,-bromo-cinnamic aldehyde, amyl cinnamic aldehyde, acetic acid Gui ester, cinnamic acid acetate, L-carnitine, coumarin , vitamin B1 and so on, one of cinnamon products only amounted to more than 100 kinds of quality and technical content are up to domestic advanced level, is expected to reach an annual output value of 10 billion yuan.

公司主要生产肉桂醛、肉桂酸、肉桂醇、肉桂腈、α-溴代肉桂醛、戊基肉桂醛、乙酸桂酯、肉桂酸乙脂、左旋肉碱、香豆素、维生素B1等，其中仅肉桂系列产品就达100多种，其质量及技术含量均达到国内先进水平，预计年产值可达10亿元人民币。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。