氧

An O2-labile protein (hypoxia-inducible factor 1, HIF-1) has been identified that is hydroxylated and degraded under normoxic conditions but actie in hypoxia, where it enhances Epo gene transcription resulting in eleated hemoglobin leels and O2 capacity of the blood. The stimulation of Epo production at lowered arterial O2 tension can be maladaptie, if erythrocytosis deelops such as seen in high altitude habitants.

此途径因提高了体内血红蛋白水平，加强了epo基因转录和氧运输能力。epo 在动脉低氧情况下的产生使机体不适应－－这种情况就如同世居高原人群中的细胞因子发生变化一样。

Concentration of estrone (E1) firstly increase and then decrease slowly until to vanish from aqueous phase; Under anaerobic condition, 4% of E2 still be in aqueous phase after 96 h of reaction.

研究了湖泊底泥微生物在好氧、厌氧环境条件下对17β-雌二醇（17β-estradiol， E2）的生物降解特性，探讨了其相应地生物代谢机制。

The results revealed that ethane and oxygen can react on catalysts with good reactivity and selectivity.

评价结果表明，临氧条件下，在四种铁基复合氧化物催化剂上的反应性能差别较大，这种反应性能上的不同是与催化剂本身结构和晶格氧的活泼性密切相关的。

It was discussed that the main factors having effect on the vulcanization time of RTV block methyl silicone rubber, such as the mol ratio of ethoxyl and silicone hydroxyl, the pH value of methyltriethoxysilane, and the content of iron ions impurity in methyltriethoxysilane, temperature, moisture, and the quantity of catalyst.

讨论了影响甲基嵌段室温硫化硅橡胶硫化时间的主要因素，如：乙氧基与硅羟基的量之比，甲基三乙氧基硅烷低聚物的pH值、铁离子的含量，以及温度、湿度和催化剂的用量等；并介绍了预防和控制这些影响因素的方法。

The UV-Visible absorption spectra and the fluorescence emission spectra of sixteen tetra-substituted metallo-phthalocyanine complexes {R4PcM, where R=2-［4-(2-sulfonic ethyl)piperazin-1-］ ethoxyl, 2-(piperidin-1-yl)ethoxyl; substitution position at α-position and β-position of phthalocyanine ring; M=Zn, Ni, Coand Cu} were measured.

报道了16种含哌嗪或含哌啶四取代酞菁金属配合物{R4PcM， R=2-［4-(2-磺基乙基)哌嗪-1-基］乙氧基、 2-(哌啶-1-基)乙氧基；取代位置分别在α位和β位； M=Zn， Ni， Co， Cu}的UV-Vis吸收光谱和荧光发射光谱的测定，探讨了中心金属离子、取代基种类及其取代位置、溶剂等因素对酞菁金属配合物UV-Vis吸收光谱和荧光发射光谱性质的影响。

Ionic liquids of 1-carboxymethyl-3-ethylimidazolium chloride, 1-methoxyethyl- 3-ethylimidazolium chloride ([C2OC1-EIM]Cl) and 1-[2-(2-chloroethoxy)ethyl]-3-ethylimidazolium chloride ([Cl-C2OC2-EIM]Cl) were synthesized, and their chemical structures were confirmed by FT-IR and 1H NMR.

合成了三种含有羧基或醚基的离子液体， 1-羧甲基-3-乙基咪唑氯化物、1-甲氧乙基-3-乙基咪唑氯化物([C2OC1-EIM]Cl)和1-[2-(2-氯乙氧基)乙基]-3-乙基咪唑氯化物([Cl-C2OC2-EIM]Cl)，用FT-IR和1H NMR对它们的化学结构进行了表征。

The progress in the catalytic ring-opening polymerization of ethylene oxide and propylene oxide is reviewed in this paper.

环氧乙烷和环氧丙烷的开环聚合产物在表面活性剂工业和聚氨酯工业得到了极为广泛的应用。

The methods and measures for improving the competition of domestic ethylene oxide in international market were pointed out.

本文对国内外环氧乙烷生产技术现状，发展动向，以及市场供需状况作了概要叙述，并指出了提高我国环氧乙烷国际市场竞争力的方法和措施。

Ethylene Oxide and Carbon Dioxide Mixture, with more than 9

环氧 烷和氧化碳的混合物，环氧烷含量超过9%，但不超过87% 1041

Ethylene Oxide and Pentafluoroethane Mixture, with not more

环氧 烷和五氟烷的混合物，环氧烷含量不超过

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。