氧

The concentration distribution of pulverized coal in blowpipe of blast furnace was measured in an isothermal two-phase model by means of a computer measuring system based on infrared transmission.

利用开发的红外透射法粉体浓度计算机测定系统，在高炉氧煤喷吹气-固两相流动模拟装置上测定了氧煤枪的煤粉浓度场。

In addition, the FeO bond length in this tetrahedral coordinated iron silicate structure decreases during the crystallization process.

进一步的研究发现，随着晶化的完全，这种铁-硅氧结构中铁-氧配键键长在慢慢变短。

Methods:39 example patients successively divide 2 experimental group , breath aircraft crews in proper order 21 examples according to being in hospital , sustained breath machine treats; Attract oxygen forming 18 examples, sustained low rate of flow attracts oxygen.

39例患者按住院先后顺序分为2个实验组，呼吸机组21例，持续Bi-PAP呼吸机治疗；吸氧组18例，持续低流量吸氧。

The profile of liver CYP450 induction by DEX in male rat After 4 daily i.p. administering of 0,25, 50 and lOOmg/kg/d DEX in male Wistar rat, it was determined the total CYP450 content, the mRNA and protein expression levels of CYP3A1, CYP3A2 and CYP2B1/2, and the ERD (CYP3A catalytic activity), PROD (CYP2B catalytic activity) and BROD (total CYP450 catalytic activity) in livers.

DEX对雄性大鼠肝脏CYP450的诱导效应雄性Wistar大鼠腹注0、25、50和100mg DEX/kg/d诱导处理4天后，测定大鼠肝脏总CYP450含量，CYP3A1、CYP3A2和CYP2B1/2的mRNA及蛋白表达水平，肝脏红酶素脱甲基酶(ERD，CYP3A活性)，苄氧基试卤灵脱乙基酶(PROD，CYP2B活性)，苯氧基试卤灵脱乙基酶(BROD，总CYP450活性)，结果表明，CYP450含量、ERD、PROD和BROD在DEX多次诱导后都有升高，CYP3A1 mRNA表达水平、蛋白含量和酶活性有明显的升高，剂量效应关系明显；CYP3A2蛋白也有明显升高，而其mRNA表达水平却没有变化，提示CYP3A1和CYP3A2的诱导机制可能不同。

The profile of liver CYP450 induction by DEX in male ratAfter 4 daily i.p. administering of 0,25, 50 and lOOmg/kg/d DEX in male Wistar rat, it was determined the total CYP450 content, the mRNA and protein expression levels of CYP3A1, CYP3A2 and CYP2B1/2, and the ERD (CYP3A catalytic activity), PROD (CYP2B catalytic activity) and BROD (total CYP450 catalytic activity) in livers.

DEX对雄性大鼠肝脏CYP450的诱导效应雄性Wistar大鼠腹注0、25、50和100mg DEX/kg/d诱导处理4天后，测定大鼠肝脏总CYP450含量，CYP3A1、CYP3A2和CYP2B1/2的mRNA及蛋白表达水平，肝脏红酶素脱甲基酶(ERD，CYP3A活性)，苄氧基试卤灵脱乙基酶(PROD，CYP2B活性)，苯氧基试卤灵脱乙基酶(BROD，总CYP450活性)，结果表明，CYP450含量、ERD、PROD和BROD在DEX多次诱导后都有升高，CYP3A1 mRNA表达水平、蛋白含量和酶活性有明显的升高，剂量效应关系明显；CYP3A2蛋白也有明显升高，而其mRNA表达水平却没有变化，提示CYP3A1和CYP3A2的诱导机制可能不同。

The pathological changes in the bronchia and lung of the 111WLM and the 174 WLM groups were characterized by the chronic inflammation.

发现大鼠吸氧及子体吸入对大鼠靶器官的损伤效应中文摘要入氧及子体后BALF细胞工L一6 mRNA的表达在174WLM剂量组明显增高，而PBMC工L一6 mRNA的表达在66WLM和174WLM剂量组都有显著增高，表明PBMC可作为早期反应的靶细胞。

Methods Potential related risk factors of ROP, such as age, sex, birth weight, FiO 2, duration of inspiring ox ygen, hyaline membrane dzsease, Apgar score, intracranial hemorrhage , recurrent apnea, broncho pulmonary dysplasia, patent ductus arteriosus were studied prospectively by univariate analysis and Logistic regression a nalysis in 135 preterm infants.

方法以 13 5例早产儿患儿为研究对象，对胎龄、性别、出生体重、吸氧时间、吸氧浓度、肺透明膜病、Apgar评分、颅内出血、支气管肺发育不良、反复呼吸暂停、动脉导管开放、眼底等进行检查。同时用单因素χ2 检验和多因素logistic回归分析筛选和判定早产儿ROP发生的危险因素。

OBJECTIVE: To study the effects of prolonged 75% oxygen exposure on the expression of vascular endothelial growth factor and its receptors (VEGFR1 and VEGFR2) in the neonatal rat lungs and to elucidate the effects of prolonged exposure of high concentration of oxygen on lung vascular development and its relationship with bronchopulmonary dysplasia.

目的：研究持续吸入75%氧对新生大鼠肺血管内皮生长因子（vascular endothelial growth factor，VEGF）及其受体（VEGFR1和VEGFR2）表达的影响，探讨较高浓度吸氧对肺血管发育的影响及与支气管肺发育不良（bronchopulmonary dysplasia，BPD）的关系。

Objective Oxygen toxicity plays a major role in the pathogenesis of bronchopulmonary dysplasiain neonates requiring ventilation.

支气管肺发育不良(bronchopulmonary dysplasia， BPD)是一种因长期用氧，氧毒性使肺组织纤维化及肺萎陷的病变［1］。

TiO2 is known to exist in three distinct structures: two tetragonal phase for anatase and rutile and a third orthornombic phase for brookite. Rutile has the most stable structure and physical and chemical properties. In rutile structure oxygen cavities move quickly so that rutile has better gas sensing respond and become a chief material use for oxygen gas sensors.

其中金红石结构是最为稳定的晶型，不但具有最为稳定的物理、化学性能，而且在金红石结构中，晶格中氧空位的迁移率较高，因而TiO_2金红石结构气敏响应效应较好，从而使金红石结构TiO_2氧化物材料成为氧敏传感器的首选材料之一。

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。