甲烷

Effect of several reaction factors on the yield of the synthesis of methane sulfonyl chloride is discussed.

阐述了利用二甲基二硫在相转移催化剂作用下，于盐酸介质中经氯气直接氧化，一步合成甲烷磺酰氯的工艺过程，讨论了几个主要反应因素对产物收率的影响，确定了适宜的工艺条件。

On the above mentioned basis, the process method of preparing continuously methane sulfonyl chloride was suggested.

用合成反应经产品分离后的母液作反应介质，合成了甲烷磺酰氯产品，提高了反应收率，增加了经济效益，减小了环境污染，获得了综合利用的效果。

Ambient conditions that include toxic gases such as hydrogen sulfide, sulfurous acid, nitrous acid, chlorine, bromine, methyl bromide, ammonium, etc.

b 周围环境中有氢化硫、亚硫酸、亚硝酸、氯气、溴气、溴化甲烷、氨气等有毒气体。

Phosphine generally require long exposure periods, whereas methyl bromide and sulfuryl fluoride provide a rapid fumigation that can be completed in less than 4 days, often within 24 hours.

磷化氢一般需要较长的密闭时间，而溴甲烷和硫酰氟则适合快速熏蒸，可在不到4天之内完成熏蒸工作，一般在24小时内完成。

It could be composed of 50 to 75 percent methane, 20 to 50 percent Carbon dioxide, around 10 percent Nitrogen, and less than 3 percent Hydrogen, Oxygen and Hydrogen sulphide.

它于50至75 ％的甲烷， 20至50％的二氧化碳，约有10 ％的氮，不到3 ％的氢，氧和氢硫化物等组成。

Excessive N fertilization is a common problem in winter wheat and summer maize rotation system in this region.

过量的氮肥施用不仅降低了氮肥的利用率，而且会引起N_2O的大量排放并抑制农田土壤对甲烷的吸收。

Now that the Southern Hemisphere's summer on Neptune is coming to a close, Orton and his colleagues predict that as the north pole turns sunward, an abundance of methane will leak out of that pole once it becomes warmer in about 80 years.

现在海王星南半球的夏季就要结束了，奥顿及其同事们预计，随着其北极开始朝向太阳，在约80年后，一旦那里变得较为温暖，大量的甲烷也将从北极泄露出去。

When the laser ablated Ni plasma acts on the head and tail of the beam, the metal methanol complex clusters Ni+(CH3OH)nand the oxidation clusters NiO+(CH3OH)n (n=1~15) together with protonated methanol clusters H+(CH3OH)n are domain.

发现NiO+(CH3OH)n是由Ni+(CH3OH)n团簇内的脱甲烷反应生成的，而H+(CH3OH)n、 H3O+(CH3OH)n主要是激光等离子体中的电子与甲醇团簇碰撞电离产生的。

In the power supply circuits in intercourse of 50HZ, 1140V, start or end the main motor of adhesive tape transportation, motor of oil pump, cool the motor of Fan, start or end of tape adhesive spread and tighten motor, take-up reel, control in order or double exchange, excavate coal machine and also protect the electromotor and power supply lines.

KJZ2-1550/1140Z 矿用隔爆兼本质安全型智能真空组合开关适用于含有甲烷混合气体、具有煤尘爆炸危险的煤矿井下。在交流50HZ ，电压1140V 的供电线路中，对胶带输送机主电机、油泵电机、冷却风扇电机及胶带张紧电机、卷带电机进行起动、停止控制，并能对电动机及供电线路进行保护。

A satisfactory theory must be able to explain why in methane the HCH angles all have the characteristic tetrahedral value.

一个完满的理论必须能够解释甲烷中为什么所有HCH角都具有四面体的特性值。

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。