氧

The pulse heating coulombic titration was applied to the determination of oxygen in titanium diboride,the titrimetry was studied to determine amounts of oxygen in titanium diboride,the determine method was established.

采用脉冲加热库仑滴定法测定二硼化钛中的氧，研究了二硼化钛中氧量的测定条件，建立了分析方法，能准确、快速地测定二硼化钛中的氧含量，并能推广应用于金属陶瓷材料中氧含量的测定。

Using the sign if icance of these characters in the aspect of sediment environment, th is paper analyzed C and O iso tope ofQ ian jiang Saline lake and educed conclu sion s: there are good relat ivity betw een the change of clim ate and sedim ent\r\nenvironm en t and the con tent's change of C and O iso tope from high to low; it is aobturated saline lake of\r\ninnerland tow ard Q ian jiang saline lake, and the con ten t of C and O iso tope was primarily decided that Ciso tope is - 5‰ and O isotope is - 2‰.

主要介绍了碳和氧同位素的地球化学特征，利用这些特征在沉积环境方面的指示意义分析了潜江盐湖的碳、氧同位素并得出了以下认识：碳、氧同位素值的高低变化与气候的变化和沉积环境的变化具有很好的相关性；潜江盐湖是一个封闭的内陆盐湖，就该湖而言，其碳同位素值可初步确定为- 5‰，其氧同位素值为- 2‰。

More pathological ultramicroscopic changes are observed after 7-hour mechanical ventilation with pure oxygen, which reduces after mechanical ventilation with 34% oxygen. Oxygen concentration should be decreased while long-time mechanical ventilation is executed so as to reduce potential lung injury with oxygen toxicity.

纯氧通气7 h后观察到的肺超微结构损伤较多，吸入氧体积分数为0.34则相对较少，建议长时间气管插管通气时，宜降低吸入氧浓度，尽可能减少潜在的氧毒性肺损伤。

The detection method comprises the steps that: conditions used for an Oxford cup method to determine polyxin B are established, standard solution of the polyxin B is used to draw a linear regression curve under the condition of biological detection, and then an Oxford cup is utilized to identify the size of a bacteriostatic ring produced by zymotic fluid at each stage, thereby measuring the content of the polyxin B in the zymotic fluid.

本发明公开了一种多氧霉素B快速定量分析的检测方法，该检测方法包括：建立牛津杯法测定多氧霉素B的条件，并用多氧霉素B的标准溶液在生物检测条件下绘制一条线性回归曲线，然后利用牛津杯鉴定各阶段的发酵液所产生的抑菌圈大小，从而测得多氧霉素B在发酵液中的含量。

Magnetic Upper-flowing Anaerobic Fluidized Bed Reactor of sulphate reducing phase and Magnetic Aerobic Fluidized Bed Reactor of biological desulfurizing phase in this technological process filled with Magnetic Hollow porous Polystyrenemicrophere were economical and actable.

3工艺中硫酸盐还原相为以N_2吹脱、磁性多孔聚苯乙烯微球为填料的磁性上流式厌氧生物膜流化床——厌氧反应器，生物脱硫相为以磁性多孔聚苯乙烯微球为填料的磁性上流式好氧生物膜流化床—好氧反应器是经济可行的。

Is a replaceable function, e. g. acetoxy, methoxy, their acyloxy and alkoxy homologs or halo .

是取化基，如乙氧基、甲氧基及它们的环氧和烷氧同系物或卤基。

For instance, motile aerobic bacteria are positively aerotactic, whereas motile obigate anaerobic bacteria are negatively aerotactic.

例如能动的需氧细菌表现出正的趋氧性，然而能动的厌氧细菌则表现出负的趋氧性。

The present invention relates to compounds of formula wherein R is hydrogen, lower alkyl, lower alkoxy, halogen or lower alkyl substituted by halogen; R is hydrogen or halogen; or R and R are together with the carbon atom to which they are attached -CH=CH-CH=CH-; R is hydrogen, lower alkyl, phenyl optionally substituted by halogen, or is hetaryl, optionally substituted by lower alkyl; R is hydrogen, lower alkyl, phenyl, benzyl, lower alkenyl, lower alkoxy, phenyloxy, benzyloxy, S-lower alkyl, halogen, CN, lower alkyl substituted by halogen or O-lower alkyl substituted by halogen; R is hydrogen or lower alkyl, aryl is phenyl or naphthyl; n is 1, 2 or 3; m is 1 or 2; and pharmaceutically acceptable acid addition salts and tautomeric forms thereof.

本发明涉及式化合物及其可药用的酸加成盐和互变异构形式，其中R 1 是氢、低级烷基、低级烷氧基、卤素或被卤素取代的低级烷基；R是氢或卤素；或R 1 和R与它们连接的碳原子一起是-CH＝CH-CH＝CH-；R 2 是氢、低级烷基、任选被卤素取代的苯基或者是任选被低级烷基取代的杂芳基；R 3 是氢、低级烷基、苯基、苄基、低级链烯基、低级烷氧基、苯氧基、苄氧基、S-低级烷基、卤素、CN、被卤素取代的低级烷基或被卤素取代的O-低级烷基；R 4 是氢或低级烷基，芳基是苯基或萘基；n是1、2或3；m是1或2。

The bay area has no substituent and has electron-withdrawing groups,such as bromine atom,cyano-group and 4-formyl phenoxy group compounds have strong absorption in 525 nm,when excitated them,they have strong yellow and salmon pink luminescence bettwen 538 and 566 nm.When introduce electron-donating substituents,such as phenoxy group,morpholinyl,piperidinyl and n-butylamino group,the absorption bathochromic shift while the electron-donating ability is improved,bettwen 536 and 692 nm have strong absorption,reach to the near-infrared region. When excitated them,only the phenoxy group compound has strong salmon pink luminescence in 572 nm,the others have no fluorescence.

其中，港湾位无取代的以及含吸电基团(—Br、—CN、对甲酰基苯氧基)化合物在525 nm左右处均有很强的吸收ε＞10~4M~(-1cm~(-1)，当光激发时，港湾位无取代、溴代和氰基取代物发出538～547 nm的强烈黄色荧光，对甲酰基苯氧基取代物则发出566 nm的强烈橙红色荧光；含供电基团(苯氧基、吗啉基、哌啶基、正丁氨基)化合物随着供电子能力的增强，吸收发生红移，在536～692 nm处均有很强的吸收ε＞10~4M~(-1cm~(-1)，达到了近红外区，当光激发时，只有苯氧基取代物发出572 nm的强烈橙红色荧光，而含氮供电基取代物均发生了荧光淬灭。

Two benzothiazole ester compounds containing boron with different alkyl chain, Di-n-hexyl-[2-(2-benzothiazolylthio)] ethyl boric acid ester (BNS-1) and Dicyclohexyl-[2-(2-benzothiazolylthio)] ethyl boric acid ester(BNS-2), were synthesized and their tribological performance as additives in rapeseed oilwas investigated using a four-ball testing machine.

合成了两种含不同烷基链的含硼苯并噻唑酯类化合物，即二正己氧基-2-[(2-苯并噻唑基)硫代]乙氧基甲硼烷(BNS-1)和二环己氧基-2-[(2-苯并噻唑基)硫代]乙氧基甲硼烷(BNS-2)。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。