氧

However , more oxygen functional groups is found in fusain though total oxygen is low .

值较高，易富集于较重的细粒径煤中，其总氧含量尽管较低，但是含氧官能团的数量较高。

Our systems are widely used in industries as ,Metal ,Nonferrous metal,glass(full oxy fibre Glass melting ,oxy zero port fluxing burner, glass containers edge melting, stress disposal, polishing),industry furnaces, automobile coating systems(Dryer ,Coating ,Factory direct heating air condition systems ),environment protection systems ,incinerator systems ,garbage incinerator, food heating,dryer systems,textile machines,solution heating applications ,electric heating ,electric heating ,electric tracer heating systems.

工程业绩遍布各类热加工设备和系统中，如钢铁、有色金属、玻璃(玻纤融化，零号氧枪，玻纤全氧熔炉，玻璃器皿烧口，应力处理，抛光)、镀锌炉等工业炉窑，汽车涂装烘烤设备(汽车涂装烘干，固化；汽车厂房直燃燃气空调，液槽加热，废气焚烧)，环保设备及焚烧燃烧系统(TNV，TAR，RTO)，垃圾焚烧处理，食品烘培、烘干设备，纺织机械，液槽加热，，电加热器，管线电伴热等。

Objective To observe the effect of oxygen therapy on hypoxaemia during sleep after general anesthesia.

目的 观察全麻后睡眠期氧疗的效果和低氧血症发生的时间。

The essential oil was prepared from the peel by solution extraction, and separated into fractions of hydrocarbon and oxygenated compounds through a silicagel column. As the oxygenated fraction had the characteristic aroma of the peel oil, odor quality of the fraction was estimated on the basis of a odor unit value. Twenty five compounds such as geranial, neral, linalool and aliphatic aldehydes were selected as the components contributed to the aroma of the peel oil.

用溶剂萃取法提取白柠檬果皮的精油，并用硅胶柱将精油分成碳氢化合物和含氧化合物两大部分，由于含氧化合物部分具有果皮油的特征香气，利用各成分的香气值对该部分进行了评价，明确了香叶醛、橙花醛、沉香醇以及一些脂肪族醛等25种成分对白柠檬果皮油香气起着重要作用。

Methoxycoumarin-3-carboxylic acid geranyl ester was synthesized from geraniol and 8-methoxycoumarin-3-carboxylic acid and its structure was characterized by IR, HRMS, 1H NMR and 13C NMR.

采用酰氯酯化法，以8-甲氧基－香豆素－3-甲酸与香叶醇为原料合成了8-甲氧基－香豆素－3-甲酸香叶酯，经IR，HRMS，1H NMR，13C NMR等鉴定，证实了其结构。

Methyl 3,6,8-trihydroxy-7-methoxy-1-methylanthraquinone-2-carboxylate is a new COX-2 selective inhibitor isolated from Gladiolus gandavensis.

1-甲基-2-甲氧羰基-3， 6， 8-三羟基-7-甲氧基蒽醌是从唐菖蒲干球茎中分离到的具有环氧化酶-2选择性抑制活性的多取代蒽醌类化合物。

Sequencing revealed that the most common genes appearedin the library is photorespiratory-related genes, such as ribulose bisphosphate carboxylase, Rubisco activase, glyoxylate aminotransferase, glutamine synthetase,glyceraldehyde dehydrogenase, ferredoxin, transport protein, etc.

测序之后发现最为显著的是一些光呼吸相关的基因如核酮糖-1，5-二磷酸羧化／加氧酶、Rubisco激活酶、乙醛酸转氨酶、谷氨酸转氨酶、甘油醛脱氢酶、铁氧还原蛋白和转运蛋白等。

Hypoxia and/or exercise increased the content of muscle glycogen,and exercise increased more obviously.

3低氧和/或运动能够增加骨骼肌肌糖原的含量，但常氧运动更有利于肌糖原的合成。

Cephalotaxine ester of 2-oxo-6-methylheptanoic acid was treated with lithium diisopropylamide and Me O-(1-methoxyisopropyl)glycolate to give a mixture of homoisoharringtonine and its stereoisomers with 56% yield. The four stereoisomers separated by TLC showed identical mass spectra and almost superimposed IR but with different 1H NMR spectra. The configuration of the 2'-C and 3'-C of the four isomers were postulated based upon their 1H NMR spectra as compared with the 1H NMR spectra of isoharringtonine and its stereoisomers.

2-氧代-6-甲基庚酰基三尖杉碱(3)与0-(1-甲氧基异丙基)羟基乙酸甲酯(4)在强碱性试剂二异丙胺锂存在下，起亲核加成反应，反应中间体5在室温用酸性丙酮水解，得到一种新的三尖杉酯类生物碱一一高异三尖杉酯碱(6c)及其立体异构体(6a、6b、6d)的混合物，产率56%、通过制备薄层层析分得这四个立体异构体，它们的1H NMR和异三尖杉酯碱及其立体异构体的1H NMR类似，推定了它们的绝对构型。

OBJECTIVE: To investigate the effect of hypoxic living with normoxic training on aerobic oxidation and glycolytic capacity of rat skeletal muscles.

目的：探讨低氧复合常氧训练对骨骼肌有氧和糖酵解能力的影响。

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。