氧

Methylcarbonate is an important organic industrial intermediate. Because its molecular structure contains carbonyl, methyl, methoxyl group and carbonyl methoxyl group, etc., it can be used in carbonylate, methylate, methoxylate organic synthetic reaction.

碳酸二甲酯是一种重要的有机化工中间体，由于其分子结构中含有羰基、甲基、甲氧基和羰基甲氧基，因而可广泛用于羰基化、甲基化、甲氧基化和羰基甲基化等有机合成反应。

The pathogenic bacteria of AV was primarily Gram-positive aerobic bacteria,with the detection rate of 80% including Staphylococci aueas,Enterococcus faecalis and E.coli;low rate of B.streptococcic was detected.The pathogenic bacteria of BV was primarily Gram-negative anaerobic bacteria,while the rate of Gardnerella was detected as less than 40%.There were 8 cases with of AV concurrent infection in 48 cases of BV infection,and 6 cases with BV concurrent infection in 31 cases of AV infection.Conclusion Microphyte profile analysis indicated that patients infected by AV were susceptible to anaerobic bacteria such as Gard...

正常女性阴道中以乳酸杆菌为主，产H2O2乳酸杆菌的检出率89%，AV的致病菌主要是革兰阳性率需氧菌、检出率可达80%，其中金黄色葡萄球菌，粪肠球菌和埃希氏大肠菌较为常见，B族链球菌的检出率较低；BV的致病菌主要是厌氧菌，以革兰阴性厌氧菌的检出率最高，加德纳菌的检出率不足40%。48例BV患者中有8例合并AV感染，31例AV患者中有6例合并BV感染。

The minimum oxygen density of liquid vapors of decalin that is extensive used in textile industry in different temperature and density. The effect of different temperature and density to minimum oxygen density is analyzed. The value of experimental determination is compared with theoretical value and the changing regularity of minimum oxygen density is discussed.

2以纺织过程中广泛使用的保护剂十氢萘为例，在不同温度、不同浓度下测定了其液体蒸气的最小氧浓度，分析了温度、浓度对最小氧浓度的影响，并通过理论值与实验测定值的比较，初步探讨了最小氧浓度的变化规律。

Nucleate sequencing revealed that the open reading frame of sodA1 and sodA2 consisted of 218 and 208 amino acids, respectively.

因为它可以将超氧阴离子自由基歧化为过氧化氢和分子氧，因此在氧自由基产生与消除的平衡中起关键作用。

The products were characterized by IR spectroscopy and TGA.The results indicated that the numerary ratios of carbon and alkoxy groups in two alkoxy derivatives are 55;1(C;OCH_3)and 76; 1(C;OC_2H_5),respectively.The existence of C-Br bonds promoted the alkoxidation of carbon nanotubes.

结果表明两种碳纳米管的烷氧基衍生物中碳与烷氧基的个数比分别为55∶1和76∶1，C-Br键的存在对碳纳米管与烷氧基的结合起着促进作用。

By measuring the numerical of oxygen transfer coefficient in double bioreactor which in water, you can know whether the rate of oxygen transfer that is meet the oxygen consumption rate of the microbes so as to ensure that the microorganisms can grow.

通过测定摇床生物反应器的氧体积系数，就可以知道氧的传递速率是否满足微生物的耗氧速度从而确保微生物的生长。

Several transient compounds were synthesized by the homo- and heterogeneous reactions of reactive halogen compounds, In-situ ultraviolet photoelectron spectroscopy and photoionization mass spectroscopy as well as theoretical calculations were used to study their molecular structures, stability and molecular orbital properties, their electronic structures and geometric structures were obtained for the first time; Simultaneously, the electronic structure and thermal dissociation of acetyl peroxynitrate and trifluoroacetyl peroxynitrate which have great importance in the atmospheric chemistry were studied; The substituent effects of series of halopyridines and halothiophenes were studied by the ultraviolet photoelectron spectroscopy method for the first time. The atmospheric chemical reaction between peroxyacetyl radicals with IO radicals as well as the dissociation of the most stable isomer of CH3COIO3 were calculated by density functional theory, it was found that the CH3COOIO2 isomer may be act as a new reservoir of inorganic iodine in the stratosphere.

通过活性卤素的系列均相与非均相化学反应合成了几种瞬态物种，采用原位紫外光电子能谱和光电离质谱结合量子化学理论计算对化合物的分子结构、稳定性以及分子轨道特性进行了研究，首次获得了这些物种的电子结构和几何结构的信息；同时研究了大气中有重要作用的乙酰过氧硝酸酯和三氟乙酰过氧硝酸酯的电子结构性质及热解过程；采用紫外光电子能谱手段首次研究了系列卤代吡啶和噻吩的取代基效应；通过量子化学理论计算研究了乙酰基过氧自由基与IO自由基的大气化学反应及其最稳定异构体CH3COOIO2的解离，发现该物种可能是无机碘化合物在平流层中的储库物种。

In this paper we begin with the electrical principle of the oxygen sensor, analyze the motive detecting method of the oxygen sensor in the LS400 car with the two-dimensional coordinator and explain the way to recognize the fault codes with oscillogram, finally illuminate the meaning of the different fault codes.

在修理发动机电控系统故障时，最想看到的就是发动机故障指示灯有规律地闪烁但有些故障需要在一定条件下，采用一定的方法才能检测到其故障代码，氧传感器的故障代码就属于这种代码通过对氧传感器的电路原理的分析，利用二维坐标图形论述了凌志LS400型轿车氧传感器的动态检测方法，并用波形图说明了该种车型的故障码识别方法，最后指出了不同故障码的意义。

The most common is the oxyacetylene welding, namely the use of acetylene and oxygen produced during combustion of oxyacetylene flame to melt the workpiece and the wire heating, condensation formed after the seam welding method.

最常用的是氧乙炔焊，即利用乙炔和氧混合燃烧时所产生氧乙炔焰，来加热熔化工件与焊丝，冷凝后形成焊缝的焊接的方法。

Objective To observe the preventive effect of early postoperative hypoxemia in aged patients with oxygenator by intravenous oxygen delivery.

目的 探讨舒氧康静脉给氧对老年病人术后早期低氧血症的防治效果。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。