氧乙炔的

On this basis, three soluble poly derivatives with asymmetric alkoxyl substituents copolymers were synthesized by copolymerization with different PPV derivatives. The luminescence characteristic and thermal performance of three copolymers were improved by copolymerization.

在此基础上，采用共聚的方法，将具有不同结构的PPV衍生物分子进行共聚，合成了三种可溶性不对称烷氧基取代聚对苯乙炔共聚物，从而改善了材料的热性能和光致发光特性。

The results showed polymeric diaryliodonium salts were effective aryl ion transfer reagents. Thirdly, a new type polymer supported hypervalent iodine reagents poly { [4-Hydroxy iodo] styrene} has been developed. It was an effective oxidative reagent, and could be applied to the one pot synthesis of 4-arylthiazoles.

然后，我们以聚苯乙烯羟基对甲苯磺酰氧基碘苯为原料，成功制备了一类新型聚合物高碘试剂—聚苯乙烯负载的炔基碘盐，并研究了其作为炔基转移试剂的有效性：(1)该试剂可对硫、氮、硒等负离子进行亲电炔基化反应，合成炔基亚砜、0，0-二烃基二硫代磷酸炔基酯、1-苯乙炔基苯并噻唑以及炔基硒醚。

Oxygen is widely applied in the metal ndustries in conjunction with acetylene and other fuel gases for metal cutting, welding, scarfing, hardening, cleaning, and melting.

同乙炔和其它燃料气体一起，氧广泛应用于金属工业的金属切割、焊接、嵌接、淬火、清洁和熔化。属类：-〖产品安全

It is found that the oxidation inhibitor s and acetylene black added in the negative active material show a slight influence on the efficiency.

结果表明，负极活性物质中添加的防氧剂和乙炔黑对O_2的复合均略有影响。

The internal pressure can be further lowered by adding 1％ acetylene black, on which a catalyst is electroless plated, to the MH electrodes.

在此基础上，通过向负极中加入1％化学镀催化剂的乙炔黑，用以加速氧的复合，结果使MH-Ni电池充电时的内压进一步降低。

This paper deals with how thermal inertia and adiabatic effect of an object welding And what flame should be applied in oxy-acetylene welding with silver-copper solder and the high temperature area of flame are also discussed then the effect of free oxygen and free carbon on welding is analyzed.

探讨了物体的热惰性和绝热效应对焊接的影响，讨论了采用银铜焊料进行氧－乙炔焊时应该运用的火焰和火焰的高温区域。

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。