乙酸

Four sorts of sex pheromones that were mixed at different ratios with three kinds of main sex pheromone components of seabuckthorn carpenter moth:-7-tetradecenyl acetate (Z7-14:Ac),-3-tetradecenyl acetate (E3-14:Ac) and-7-tetradecenyl acetate (E7-14:Ac), were experimented in the field. The results showed that four kinds of pheromones all had strong, attractive effects on male moths.

为比较沙棘木蠹蛾性信息素不同配方的诱集效果，该文利用人工合成的性信息素组分顺-7-十四碳烯乙酸酯(Z7-14：Ac)、反-3-十四碳烯乙酸酯(E3-14：Ac)和反-7-十四碳烯乙酸酯(E7-14：Ac)按照不同比例配置的4种配方进行了野外诱集试验。

The process is carried out by taking organic acid and sulfoxide chloride as raw materials, acyl chloride synthesizing, reacting ethylenediamine with sodium chloroacetate to synthesize intermediate sodium EDDA, and reacting it with acyl chloride to synthesize the final product.

所述双子烷基羧酸盐表面活性剂是由以下方法制得的，以有机酸和氯化亚砜为原料首先进行酰氯的合成，再用乙二胺与氯乙酸钠反应合成中间体乙二胺二乙酸钠，将中间体乙二胺二乙酸钠与酰氯反应合成终产物。

It is found that the sample stained with silver methenamine instead of mercaptoacetic acid-osmium can prevent the false phenomena caused by the inappropriate use of mercaptoacetic acid.

摘 要：本文将六亚甲四胺银染色法作为加工毛发的电子染色剂得到较好的电子显微图像，并系统地比较了用巯基乙酸-锇法染色的羊毛样品和用六亚甲四胺银染色的人发样品的超微结构，认为对深加工过的毛发样品用六亚甲四胺银法替代巯基乙酸-锇法染角蛋白，可以防止巯基乙酸使用不当引起的假象。

In this method, EDTA was used as complexant which can form 1∶1 complex with Cr〓, this complex carried negative charge and can be detected directly by UV absorbance at 200nm, therefore, the CrO〓 and Cr〓 can be separated and determined in one run.

采用乙酸钠-乙二胺四乙酸钠-CTAB-乙酸缓冲液体系，加入EDTA使Cr〓与其生成的1∶1络合物，带负电荷且具有紫外吸收，在200nm处可用直接紫外法检测。

To prevent epidemical disease prevalence caused by microorganisms in indoor air, a study was carried out to investigate the effect of ventilation, peracetic acid and ozonization on microorganisms reduction in the indoor air within a campus. The experimental results indicated that ventilation was an effective measure in reducing indoor air microorganisms with economy and simple operation.

为了防止室内空气微生物导致的传染病发生，对某校园室内的空气进行通风、过氧乙酸和臭氧灭菌降低微生物的实验研究结果表明，通风可以有效地降低室内微生物的浓度，是最为经济和易行的措施；过氧乙酸灭菌效果好，持续时间较长，可在不易实施通风情况下采用过氧乙酸灭菌；臭氧具有迅速杀菌的效果，使用时要与人保持一定距离，最好超出 1m。

In 5 μM. pseudolaric acid B-treated HeLa cells, caspase-3 proenzyme decreased followed by the degradation of caspase-3 substrates, ICAD (inhibitor of caspase dependent DNase) and PARP poly-(ADP-ribose polymerase.

土槿皮乙酸5μM作用于HeLa细胞后，caspase-3的酶原被降解，caspase-3底物ICAD(inhibitor of caspase activated DNase)和PARPpoly-(ADP-ribosepolymerase降解，caspase-3的抑制剂可部分抑制土槿皮乙酸诱导的细胞死亡，表明土槿皮乙酸诱导HeLa细胞凋亡时激活了caspase-3。

Results 1 week af ter injection , the average diameter of tumors ineach test group decreased when compared with the cont rol group. In 100 % acetic acid2group , only 1case had renascent tumors near the necrosis focus.

结果 注射后一周各实验组肿瘤直径均减小，对照组肿瘤直径明显增大。100 %乙酸组10 例仅1 例在坏死灶周围发现新生灶，而50 %乙酸组发现5例，75 %乙酸组发现7 例。

Solani. The extract was further separated into two parts and one part separated by ethyl acetate while the other was separated by petroleum ether. Based on the inhibition experiment against R. solani, ethly acetate extract has a rather strong effect on R. solani with 89.70% inhibition rate and 15.52 mgmL^(-1) EC 50.The effect of petroleum ether extract on R. solani is relatively weak. The former was again divided into five parts in silica gel column, of which the second part significantly inhibits R. solani. During the periods of 24 and 48 hrs, the inhibition rate of the second part on R. solan is respectively 89.58% and 80.36%.

结果表明：鸭粪乙醇提取物对水稻纹枯病菌有抑制作用，24h内最高菌丝生长抑制率和EC50分别为88.64%、26.11mgmL^(-1)；鸭粪乙醇提取物经萃取分离得到石油醚和乙酸乙酯两种组分，其中石油醚组分抑菌效果较弱，乙酸乙酯组分抑菌能力较强，其对水稻纹枯病菌抑制率为89.70%，EC50为15.52mgmL^(-1)；对乙酸乙酯组分进行硅胶柱层析分离得到5种流份，其中第2流份有显著抑菌活性，在24h和48h内对水稻纹枯病菌的抑制率分别为89.58%和80.36%。

Consider to make clear in recent years, second acid is calcic - Bowman does not move bacillus clinical bacterium of single born of the same parents of the detached rate that go up and verdigris holiday comparatives, have the tendency that year after year rises, the fundamental condition pathogenic bacteria that already became the infection inside the courtyard [1] , have to a variety of antibacterial content be able to bear or endure higher property of a medicine [1, 2] , for this, we are monitored and statistic analysed my courtyard to came 1998 2004 7 years a second acid is calcic - the clinical infection condition that Bowman does not change bacillus, to 14 kinds of antibacterial content be able to bear or endure property of a medicine and be able to bear or endure medical tendency, sum up a report to be as follows now. 1 material and method all data all come from 1.1 basic materials to came on January 1, 1998 my courtyard outpatient service was mixed on December 31, 2004 the specimen sending check of inpatient, via clinical microbiology the lab is fostered and classics appraisal is second acerbity calcium - Bowman does not move bacillus to affect case of illness, with clinical and commonly used antibacterial at the same time content makes the kill that medical quick detects. 1.2 bacteria appraisal is mixed medical quick experiment uses live thing VITEK32 of Mei Li dust is full automatic the bacterial appraisal of bacterial analysis system and its form a complete set gets stuck and medical quick card undertakes detecting, 1998~2000 year use GNI appraisal gets stuck, 2001~2004 uses GNI+ card.

近年探究表明，乙酸钙-鲍曼不动杆菌临床上的分离率和铜绿假单胞菌相当，并有逐年上升的趋向，已成为院内感染的重要条件致病菌[1]，对多种抗菌药物有较高耐药性[1，2]，为此，我们监测并统计分析了我院1998年至2004年七年间乙酸钙-鲍曼不动杆菌的临床感染情况，对14种抗菌药物的耐药性及耐药趋向，现总结报道如下。1材料和方法1.1基本资料所有资料均来自于1998年1月1日至2004年12月31日我院门诊和住院病人的送检标本，经临床微生物学实验室培养并经鉴定为乙酸钙-鲍曼不动杆菌感染病例，同时以临床常用抗菌药物作药敏检测的结果。1.2细菌鉴定和药敏试验采用生物梅里埃VITEK32全自动细菌分析系统及其配套的细菌鉴定卡和药敏卡进行检测，1998~2000年使用GNI鉴定卡，2001~2004使用GNI+卡。

objective to determine the contents of residual acetone in acetoacetic ester,the raw material for the synthesis of edaravone, by gas chromatography.methods sample solution was injected on a gdx column (0.18 mm～0.25 mm) with nitrogen as the carrier gas.the residue was calculated by the external standard method.results the linearity was good over the range of 25 μg/ml～400 μg/ml,with the correlation coefficient of acetone being 0.996 and the average recovery 96.8%.conclusions the method was proved to be simple,rapid,practical and highly sensitive.it is an efficient method for the quality control of acetoacetic ester.

摘要］ 目的：用气相色谱法测定依达拉奉合成起始原料乙酰乙酸乙酯中丙酮的残留量。方法：采用固定相为二乙烯苯乙基乙烯苯型高分子多孔小球（直径为0.18 mm～0.25 mm），氮气为载气，用外标法测定乙酰乙酸乙酯中残留丙酮的含量。结果：该方法在丙酮浓度范围在25 μg/ml～400 μg/ml内呈良好的线性关系，响应曲线相关系数为0.996，平均回收率为96.8%。结论：本法简便，快速、实用，灵敏度高，可有效地用于乙酰乙酸乙酯的质量控制。

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。