氧

Methoxytriphenylamine and 4,4′-di methoxy -triphenylamine with good solubility in common organic solvents were synthesized by Ullmann reaction.

通过Ullmann反应合成了4-甲氧基三苯胺和4，4′-二甲氧基三苯胺两种具有良好溶解性的甲氧基取代三苯胺，通过FTIR、1H NMR和元素分析等手段对其进行了表征，并采用循环伏安结合UV-Vis吸收光谱测试了其能级结构。

At 60 ℃ the reaction of 1-O-alkyl-2-O-acetyl-3-O-trityl glycerol with iodine/methanol system removed trityl and acetyl and gave 1-alkyl glycerol. But at r.t. the reaction only removed trityl and gave two isomers 1-O-alkyl-2-O-acetyl glycerol and 1-O-alkyl-3-O-acetyl glycerol.

1-烷氧基-2乙酰氧基-3-三苯甲氧基甘油醚与碘/甲醇体系反应，在60 ℃时，同时发生了脱三苯甲基及乙酰基，在室温下，仅脱三苯甲基，但乙酰基在反应过程中发生了部分转移，产生了两个异构体。

The comparison on the initiation activity of vanadyl polycarboxylate with vanadyl iso-butyrate and vanadyl sulfa-te (low molecular non-homologue) was made.

在引发活性方面对聚羧酸氧钒、异丁酸氧钒和硫酸氧钒作了对比。

The average epoxy value and the average viscosity of such diluent were 0.502×10-2eq/g and 3.2 mPa.s(25 ℃) respectively. It was an ideal diluent and could be used instead of active diluent such as butyl epihydrin etc. and non-active diluent such as dibutyl phthalate etc. in epoxy resin industry. The preparation of the epoxy diluent by fusel oil could not only settle the problem of environmental pollution caused by fusel oil drainage, but also produce economic and social benefits.

结果表明，杂醇油制备的环氧树脂活性稀释剂环氧值平均为0.502×10-2eq/g，环氧值适中；粘度平均值为3.2 mPa.s(25 ℃)，粘度较小，为比较理想的环氧树脂活性稀释剂；该环氧树脂活性稀释剂可望代替环氧丙烷丁基醚等活性稀释剂和邻苯二甲酸二丁酯等非活性稀释剂应用于环氧树脂工业；可解决酿酒企业和酒精厂下脚料杂醇油排放带来的环境污染问题。

METHODS: While hypoxia-reoxygenation groups were not given any medicine intervention as control, the treatment of xionggui diwan 1×10-6mol/L was subdivided into xionggui diwan 1 × 10-6 mol/L + non-hypoxia and xionggui diwan 1 × 10-6 mol/L + hypoxia groups, and the treatment of xionggui diwan 10 × 10-6 mol/L was subdivided into xionggui diwan 10 × 10-6 mol/L + non-hypoxia and xionggui diwan 10 × 10-6 mol/L + hypoxia groups.

缺氧-复氧前后组分为两个亚组(即缺氧-复氧前、缺氧-复氧后)，均不进行药物干预；芎归滴丸1×10-6 mol/L组分为两个亚组(即芎归滴丸1.0×10-6mol/L+不缺氧组、芎归滴丸1×10-6mol/L+缺氧组)；芎归滴丸10×10-6mol/L组分为两个亚组(即芎归滴丸10×10-6 mol/L+不缺氧组、芎归滴丸10×10-6mol/L+缺氧组)。

Oxygen precipitation in CZ and GCZ silicon during the prolonged anneals at 800 ℃ and 1000℃ for up to 225 h was intensively investigated.

研究发现，Ge的掺入对氧沉淀有显著的促进作用，这种促进作用表现在对氧沉淀的量以及密度两方面的增加，并且TEM的观察证明了Ge的掺入对硅中氧沉淀的微观形态和尺寸都有所改变。

The Fe^0 concentration and pH had optimal values during the decolorization of X-BR in Fe^0-anaerobic biological system. When Fe0 dose, initial pH value and X-BR concentration were 400 mg/L, 7 and 100 mg/L respectively, the decolorization rate of X-BR in the integrated system could reach up to 90% after 68 h reaction. Compared with pure Fe^0 and pure microorganism treatment systems, it could be improved about 40% under the same experimental conditions. In addition, the analysis result of UV-vis spectrogram indicated that Fe^0 could promote effectively biodegrading of anthraquinone dye X-BR and its intermediate products.

结果表明，在Fe^0-厌氧微生物体系中，Fe^0投加量和pH值均存在最适宜值，当两者分别控制在400mg/L和7，染料初始浓度和反应时间分别为100mg/L和68h时，该体系脱色率可达到90%以上；与相同反应条件下的纯Fe^0、纯厌氧微生物体系相比，该体系的脱色率提高近40%根据紫外可见光谱分析，Fe^0可有效促进厌氧微生物对X-BR及其中间产物的降解，实现完全脱色。

The deaerated head is mostly consisted of shell and primary and secondary deaerated devices, on which there are the Inlet of primary heating steam, and the ports of secondary heating steam and exhaust steam as well as the interface of safety valve.

除氧头主要由筒体、一级除氧装置、二级除氧装置等组成。在其上设有一次加热蒸汽进口、二次加热蒸汽口、排汽口、安全阀接口等组成。

Due to the particular configuration, single shell deaerator is provided with many remarkable excellences,for example,the higher heat efficiency,the better deaerating effect and the higher economic ben.

单筒式除氧器也被称为无头除氧器，独特的结构使之具备了热效率高、除氧效果好等许多显著的优点，目前已被国内外众多的发电机组所采用。

To study the relationship between the "tail" structure and the characteristics of Gemini surfactants, a new gemini surfactant CH(subscript 2s)-αω-Bis (dehydroabietyihydroxypropyltetramethylethyldiammonium Chloride) here s=2, has been synthesized. Dehydrogenated rosin as hydrophobic "tails" in the structure. The affections of reacttants ratio, reaction temperature and time on the yield of aimed compound have been discussed.

研究了Gemini表面活性剂中疏水&尾巴&结构对性质的影响，以脱氢松香酸和环氧氯丙烷为原料合成了中间体3-脱氢松香酰氧－2-羟丙基氯，再与四甲基乙二胺反应，得到1种以脱氢松香酰基为疏水链&尾巴&的对称Gemini型双季铵盐阳离子表面活性剂：二氯化－N，N'-二（3-脱氢松香酰氧－2-羟丙基）四甲基乙二胺。

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。