氧

Superoxide dismutase (EC 1.15.1.1;SOD) is a metal-containing enzyme that widely exist in organisms. It catalyzes the dismutation of superoxide free radical and produces hydrogen peroxide and oxygen.It plays an important role in protecting the plasmalemma from the reactive oxygen species.A recombinant plasmid pPICZA-sodM18 was constructed and after its linearization was transferred into chromosome of Pichia pastoris GS115 by electroporation.

超氧化物歧化酶(Superoxide dismutase；EC 1.15.1.1；SOD)是广泛存在于生物体内的金属酶，是机体内唯一以超氧阴离子自由基(O_2~-)为底物的酶，它能专一地催化O_2~-的歧化反应，生成过氧化氢和氧气，能有效的抵御氧自由基和其他氧化物自由基对细胞质膜的毒性，对机体防御氧化损伤起着十分重要的作用。

They have a wide of biological effects, including antioxidation, free radical scavenger and chelators of divalent cations etc.

其中，槲皮素是很强的单线态氧的猝灭剂，能有效抑制单线态氧引起的对类胡萝卜素的破坏。

It crystallizes in the monoclinic space group C2/c, with a=1.6953(3)nm, b=1.9241(4)nm, c=1.7760(4)nm,β=94.75(3)°. Each Gd ion is coordinated by two oxygen atoms from two different radicals NITPh(OCH3)3 and six oxygen atoms from three hfac molecules to form eight-coordinated dodecahedron geometry.

Gd离子采取八配位的模式，两个氮氧自由基作为单齿端基配体分别以氮氧基团的氧原子与Gd离子配位，三个六氟乙酰丙酮阴离子分别以两个氧原子与Gd离子配位，构成十二面体。

Objective:To observe the effects of long term domiciliary oxygen therapyon the quality of life in chronic obstructive pulmonary disease with hypoxemia.

目的：观察长期家庭氧疗对慢性阻塞性肺疾病伴低氧血症患者生命质量的影响。

Because of the property of donative electron of the methoxy group and the participation of the carbonyl group of the coumarin into the complexation proces...

研究表明，由于在香豆素的6 位上引入一个甲氧基，对应的主－客配合物的稳定常数较（7－甲氧基－4－亚甲基）香豆素基－单氮杂－ 18－冠－6（ MMC－ MAC（O5））与阳离子配位的稳定常数又有所增高。

The main production and the fire extinguishers matching accessories: dry powder dusting of assembly, dioxane high-pressure nozzle assembly, dioxane elbow assembly, was clean asbestos, insurance sales, iron leather, Qian Feng, a peg, and Kind of screw joints, all kinds of rubber seals, etc..

主要生产与灭火器配套的消防配件：干粉喷粉管总成，二氧高压喷管总成，二氧弯管总成，无尘石棉被，保险销，铁皮套，铅封，挂具，及各种螺丝接头，各种橡胶密封圈等。

Is introduced in this paper,which refers to the enol compound s are as accelerator for anaerobic adhesive,and the comparison between this novel accelerator and conventional ones (substituted hydrazine,amine and saccharin) is carried out.

本文是一篇中国专利(专利申请号：200610034451.2)内容的简介，此专利内容是涉及用烯醇类化合物作为厌氧胶的促进剂，并与现代厌氧胶产品中惯用的促进剂代表性组成进行比较。

In the pelagic subsystem,there are 4biological state variables which were represented by functional groups:flagellate,diatom,pelagic bacteria and zooplankton.In the benthic subsystem,there were 5 biological state variables represented also by functional groups:macrobenthos,meiobenthos,aerobic and anaerobic bacteria,and shrimp-which is actually epibenthos.

将浮游亚生态系又划分为4个功能群，分别为：鞭毛藻、浮游硅藻、水体中细菌和浮游动物，将底栖亚生态系划分为5个功能群，分别为大型底栖动物、小型底栖动物、底栖厌氧菌、底栖好氧菌，对于营底上生活的对虾也划分在这一亚生态系中予以考虑。

All accord with DMS of professional sex acute toxic diagnostic standard [2] , spend gently among them, in spend each 4. Classics mouth conduit gives to suck oxygen and heart report custody namely after 1.3 cure and result are admitted to hospital 8 times, diagnose hind all applies antibiotic to prevent infection all over, pulverization is inspiratory eliminate laryngeal oedema, and support treatment to disease, strengthen a foundation to nurse. Degree of saturation of 4 pulse oxygen (SpO2)75%~85%, 2 routine are tracheal dissection, epispastic gas secretion of appearance of the bubble inside the canal, afterwards grants to breathe out...

均符合职业性急性DMS中毒诊断标准[2]，其中轻度、中度各4例。1.3治疗及结果8例入院后即给予经口导管吸氧及心电监护，确诊后均全身应用抗生素预防感染，雾化吸入消除喉头水肿，以及对症支持治疗，加强基础护理。4例脉搏氧饱和度(SpO2)75%~85%，2例行气管切开，吸出气管内泡沫样分泌物，继予呼。。。

Assuming phenylephrine100 g to be approximately equipotent to ephedrine 8 mg,the groups contained the proportional potency equivalent of100%, 75%, 50%, 25% or 0% of phenylephrine and 0%, 25%, 50%,75% or 100%, respectively, of ephedrine.

假设100ug 去氧肾上腺素约相当于8mg 麻黄碱，那么五组混合物中就分别含有去氧肾上腺素等效剂量100%、75%、50%、25%或0%及麻黄碱0%、25%、50%、75%或100%。

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。