乙酸

On the basis of above results, the reaction rectification tower to synthesize benzyl chloride was established.

目前，国内均采用间歇釜式生产，一氯乙酸生成的同时也生成了副产物二氯乙酸，反应终点二氯乙酸浓度在12-25％。

The amount of hydroxyacetic acid , equal to that of sodium chloride, produced from chloroacetice acid hydrolysis is determined by adopting Moore method and there fore the ratio of transformation of chloroacetice acid hydrolyzed can be calculated.

氯乙酸水解生产羟基乙酸的工艺过程中产生等物质量的氯化钠，采用莫尔法测定氯乙酸水解的产物氯化钠，并计算氯乙酸的水解转化率，从而选择和控制水解反应的条件。

The ionization enthalpies of acetic acid, chloro-, bromo- and iodo- acetic acids were measured at 5℃ intervals between 20℃ and 45℃ in aqueous solution by LKB-2277 Bioactivity Monitor.

本文用LKB-2277BioActivityMonitor以5℃的间隔测量了20-45℃温度区间乙酸、氯乙酸、溴乙酸和碘乙酸在水溶液中的电离焓。

A method for synthesizing sodium sulfoacetic is discussed,which sodium sulfoacetic is synthesized with sodium sulfite and ethyl monochloro acetate,with sodium sulfite and chloroacetic acid.

主要分别介绍用亚硫酸钠与氯乙酸乙酯合成磺酸乙酸钠和亚硫酸钠与氯乙酸合成磺酸乙酸钠。

The invention relates to a fabric nanometer following cleaning agent for obtaining TiO2/ZnO composite hydrosol, and relative production and cleaning method, wherein it uses butyl titanate and zinc acetate as predecessor, uses glacial acetic acid as catalyst and peptizer, uses water as solvent, uses absolute ethyl alcohol as the solvent of butyl titanate, and uses ethanolamine as deposit agent and supplies OH-, to be hydrolysed and polycondensated to form TiO2/ZnO composite hydrosol. And its components and mass percents are: butyl titanate at 1-15%; zinc diethyl at 1-12%; absolute ethyl alcohol at 1-20%; glacial acetic acid at 5-15%; and aminoethyl alcohol at 0.1-5%, and the left is water. The invention has lower cost and simple process.

本发明涉及一种可以得到TiO 2 /ZnO复合水溶胶的纺织品纳米后整理试剂及其制备工艺及对织物的整理方法，以钛酸丁酯和乙酸锌为前驱物，冰乙酸为催化剂和胶溶剂，水为溶剂，无水乙醇为钛酸丁酯的溶剂，乙醇胺为沉淀剂并提供OH -，经过水解、缩聚反应形成的TiO 2 /ZnO纳米溶胶整理剂，其组分和重量百分比含量如下：钛酸丁酯占1～15％；二水乙酸锌占1～12％；无水乙醇占1％～20％；冰乙酸占5％～15％；乙醇胺占0.1％～5％；水余量，具有耐洗性、无毒、无刺激、成本低廉、制作工艺简单可靠的优点，可实现对对织物的抗紫外、抗菌、抗静电功能整理。

Results The mixing, loading and storing processes of the construction, might generate lots of occupational hazards, including toluene, dimethylbenzene, trimethylbenzene, isopropanol, butyl alcohol, propanol, methyl methacrylate, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, acetic ether, nitro-cotton, n-hexane, n-heptane, carbinol, ethanol, ethyl propionate, diisobutyl ketone, glycol ether, isoamyl acetate, 2,4-toluene diisocyanate, isophorone, noise, power frequency electric fields.

结果 该项目在混兑生产和装卸、仓储过程中，可能产生的职业病危害因素主要有甲苯、二甲苯、三甲苯、异丙醇、丁醇、丙醇、甲基丙烯酸甲酯、乙酸丁酯、甲基异丁基甲酮、丁酮、乙酸乙酯、硝化棉、正己烷、正庚烷、甲醇、乙醇、乙酸丙酯、二异丁基甲酮、乙二醇乙醚、乙酸异戊酯、2，4甲苯二异氰酸酯、异佛尔酮、噪声、工频电场。

The addition of formic acid inhibitted the growth of LAB at the early stage of the fermentation, decreased the production of lactic acid and the pH of the early stage of the silage and increased initially the growth of the yeast and mold but inhibitted the growth of mold after 5 days of ensiling.

结果表明：单独添加植物乳杆菌增加了乙酸生成量和总有机酸生成量，降低了乳乙酸比；单独添加戊糖片球菌减少了乙酸生成量和总有机酸生成量，提高了乳乙酸比；二者均延缓了pH值的下降速度。

All animals were individually fed with a constant concentration and hay for 8 weeks. Results showed that VB12 production from cobalt in lambs was similar when using cobalt sulphate and cobalt chloride, and was significantly higher (P.05) in cobalt sulphate than in cobalt acetate. However, VB12 production significantly decreased in cobalt oxide treatment compared with other forms of cobalt sources. The relative bioavailability of cobalt sulphate, cobalt chloride, cobalt acetate and cobalt oxide was 100%, 95.66%, 89.50% and 22.56% respectively.

结果表明：1硫酸钴、氯化钴、乙酸钴、氧化钴的相对生物学有效率分别为100%、95.66%、89.50%和22.56%(P.01)；2硫酸钴、氯化钴、乙酸钴和氧化钴组血浆VB12的含量分别为1666.9、1594.5、1493.3和376.1pmol/L，硫酸钴、氯化钴组相近，乙酸钴组稍低，而氧化钴组明显下降，血浆甲基丙二酸含量为2.94、3.01、3.49和3.99μmol/L；同型半胱胺含量为8.91、9.23、9.97和10.78μmol/L，硫酸钴与氯化钴组相近，乙酸钴组稍有增加，而氧化钴组明显升高，3个指标反映了一致的钴营养状况。

Nuttallii propagules germinated normally, but the buds was significantly inhibited (p.05) in growth and the recovery in the subsequent culture was slow. Exposures to 4 mmol/L or higher caused death of E. nuttallii. In contrast, at concentration of 4 mmol/L, all P. crispus buds survived with significant growth and had a good recovery in the subsequent culture; P. crispus turions were remarkably reduced in gerimination rate, but all sprouted in the subsequent culture.

在4mmol/L的乙酸影响下，菹草幼芽仍有明显的生长；菹草繁殖体的萌发受到显著抑制(p.05)，但在随后的培养中可全部萌发。4mmol/L以上的乙酸暴露3d或6d导致伊乐藻全部死亡，8mmol/L的乙酸处理6d或16mmol/L的乙酸处理3d或6d导致菹草全部死亡。

The long-term and short-term effects of different propionic/acetic acid ratio and initial pH on the anaerobic and aerobic transformations of GAOs were studied.

2在丙酸和乙酸的碳摩尔浓度相同的情况下，GAOs吸收乙酸的速率较快，且在乙酸浓度适宜的情况下，GAOs对乙酸的吸收不需要长期驯化，短期提高进水中的丙酸量可抑制GAOs的生长。

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。