丙烷

Objective To study the effects of Octafluoropropane on chronic hypotony and prognosis after severe eye trauma.

目的探讨危重眼外伤Ⅰ期术中或术后应用全氟丙烷（C3F8）气体对Ⅱ期手术及其预后的影响。

Among the six polyetherimdes, ODPA-IPDA with the largest free-volume and larger intrasegmental mobility has the highest permeability and the lowest permselectivity, ODPA-DABP with the smallest free- volume and the smallest intrasegmental mobility has the lowest permeability and the lowest permselectivity, ODPA-DMMDA with the larger free-volume and smaller intrasegmental mobility has higher permeability and higher permselectivity.

二苯醚四酸二酐（ODPA－4.4＇－二J氨基二苯异丙烷具有很大的自由体积和较小的链段活动性、很大的透气性和较小的透气选择性，ODPA—4，4'－二氨基二苯酮具有很小的自由体积和较小的链段活动性、很小的透气性和较大的透气选择性，ODPA—3，3'－二甲基二苯甲烷二胶具有较大的自由体积和较小的链段活动性、很大的透气性和很大的透气选择性。

In this work, trially1 isocyanurate and trimethylolpropane trimethaerylate were used as a polyfunetional monomer of PP/PE blends, and the effects of radiation dosage, the kind and amount of polyfunetional monomer on the morphology and mechanical properties were studied.

本研究中采用三烯丙基异腈脲酸酯和三羟甲基丙烷三甲基丙烯酸酯为PP/PE共混体系的多官能团单体。研究了辐照剂量，多官能团单体种类和多官能团单体用量对共混物形态结构及力学性能的影响。

The reaction mechanism of triglycidyl isocyanurate and the production process were briefly mentioned, but the characteristics of production process were introduced in detail.

简要介绍了TGIC工艺反应原理、工艺生产流程；重点介绍了该工艺特点，包括含盐废水处理及回收利用，用中和法处理含盐废水，可回收4%左右的环氧氯丙烷原料，工业用盐纯度达95%，用副产品法处理含盐废水，可产纯度89%的工业用盐，同时还可生产水溶性树脂副产品；废水封闭循环利用，使生产过程无废水排放；母液回收利用，可生产光敏树脂。

Adsorption isotherms of propane, butane, propane and liquified petroleum gas on the quartz beads were determined respectively by means of the method of vacuum weighing , and the relationship between the isosteric adsorption enthalpy change and adsorbance was also reported.

用石英玻璃微珠模拟了HP－1，HP－20M，HP－17毛细管色谱柱内壁，用真空重量法测定了丙烷、丁烷、丙烯、液化石油气样品在3种模拟毛细管内壁表面的吸附等温线，并计算了等量吸附热随吸附量的变化关系。

In this paper several methods including acylamide dehydration, metal cyanide replacement, etherification and isoxazole method for synthesis of 3,3-diethoxyethylcyanide were reviewed.

综述了3，3-二乙氧基丙腈的合成方法，包括酰胺脱水、金属氰化物取代、醚化和异恶唑法，用于工业化生产较为满意的合成路线是以1，1，3，3-四乙氧基丙烷为原料的异恶唑法。

In the oxygen steelmaking processes, material from the blast furnace saturated with carbon is placed in a vessel capable of holding some 100 ~ 300 t of hot metal. Oxygen is then lanced from above the bath for about 15 min, or alternatively a mixture of oxygen and propane is blown up through tuyeres in the bottom of the vessel (bottom-blown).

在氧气炼钢工艺中，把来自于高炉的含饱和碳的铁水兑人一个容量约为100一300吨的转炉中，然后用氧气从金属熔池上面向熔池喷吹约I5分钟，或者通过熔池底部喷嘴喷入氧气和丙烷的混合气体。

Based on the different reaction results with-menthyl,-8-(2-naphthyl)menthyl or-8-phenylmenthyl as the chiral auxiliary, it is was proposed that the possible p -stacking effect between the aryl of chiral auxiliary and dienyl group of α,β-unsaturated esters is involved in the diastereoselectivity of these reactions.

该反应手性辅基易于回收、选择性好，产率高，这一工作为合成多取代的光学活性乙烯基环丙烷衍生物的提供了一种较为简便的方法。

Influences of reaction temperature, catalyst concentration, molar ratio of methanol to propylene oxide and reaction time on conversion of propylene oxide, yield and selectivity of propylene glycol monomethyl ether were studied.

研究了甲醇与环氧丙烷在固体碱催化剂MAF存在下非均相合成丙二醇甲醚的过程。

Three part of research works had been carried out in the dissertation. The first part: a kind of multidentate amine modified silica gel was synthesized through the following steps:(1) introduce the amino groups onto the surface of silica-gel by the treatment of surface silanol groups withγ-aminopropyl trimethoxy silane;(2) michael addition of excess trihydroxymethyl propyl triacrylate to amino groups on the silica gel surface;(3) amidation of the unreacted double bonds of TMPTA on the surface of TMPTA modified silica gel with diethylenetriamine;(4) the multidentate amine modified silica gel was finally obtained by the reaction of amino groups on the surface of DETA modified silica gel with double bond of butyl acrylate.

本论文进行了三部分研究工作，第一部分：通过多步反应对硅胶进行改性合成了一种多齿胺改性硅胶配体，合成过程如下：1通过γ-氨丙基三甲氧基硅烷与硅胶表面的硅羟基反应，使硅胶表面带有氨基；2利用硅胶表面氨基与过量的三羟甲基丙烷三丙烯酸酯发生Michael加成反应；3利用二乙烯三胺与TMPTA改性硅胶表面未反应的双键发生反应使硅胶表面氨基化；4最后用丙烯酸正丁酯与DETA改性硅胶表面氨基充分反应成功合多齿胺改性硅胶配体。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷