This paper analyzes shell electron pair repulsion theory , valence-bond theory and molecular orbital theory on molecular structure of noble gas compounds.
对稀有气体化合物的分子结构分别用“价层电子对互斥理论”、“价键理论”和“分子轨道理论”进行了分析处理。
One is gas hydrates—white, sorbet-like compounds that usually consist of methane molecules trapped in a cage of water.
一个是气体水合物，这是一种白色的、类似果汁冰糕的混合物，通常由嵌入笼形水结构的甲烷组成。
In all of the known chemical compounds of the noble gases, the noble-gas atom has a net positive charge.
在为人所知的所有稀有气体化合物中，稀有气体原子具有净正电荷。
In the past, pads and tampons were typically whitened with elemental chlorine gas, a process that can create dioxins-a class of toxic, chlorinated compounds that can pollute the environment.
过去，卫生巾和卫生棉条通常都会使用含氯的气体漂白，而漂白过程总会产生破坏环境的二恶英。
The inert gas molecules temporarily bind to the reactive gases, forming excited compounds that release energy either spontaneously or by stimulation.
惰性气体分子暂时结合到反应性气体，形成了自发地或通过刺激释放能量激发的化合物。
More generally, hydrates are compounds in which gas molecules are trapped within a crystal structure.
更常见到的水合物是气体分子被圈闭在一个晶体构造内的化合物。
Using gas chromatography and mass spectrometry, researchers have, over the years, identified more than 3,000 compounds that are regularly exhaled, excreted or exuded from the body.
这些年来，凭借着气相色谱分析技术和质谱分析技术，科学家已经鉴定出来了能有规律的从人体排出或者挥发出的超过3,000种化合物。
They are believed to be the compounds of gas and metal ions at brazing with F-from Teflon that is decomposed by radiation.
它们是辐射环境中的聚四氟乙烯降解释放的氟离子与焊缝处气体离子和金属离子反应的化合物。
Substances that have been manufactured by chemical means using petroleum compounds or natural gas as raw materials.
以石油化合物或天然气为原料用化学方法制造的物质。
Moreover, the chromatography separate condition, sample clean-up, the distributes regulation of target compounds in gas and particles, and the trap efficiency of sampling instrument is also studied.
并对色谱分离条件、样品净化方式、目标化合物在气相和颗粒物上的分布规律及采样器的捕集效率进行了实验。
It studies the vapour absorption property of the natural bentonite on several compounds gas, also observes and studies the best conditions of bentonite as absorbent.
本文研究了天然膨润土对几种化合物蒸汽的吸附性能，考察了膨润土作为吸附剂时的最佳条件。
Gas chromatography shows that there are more than 100 compounds in light hydrocarbon pyrolysates.
经毛细色谱分析，热解轻烃中有100余种化合物。
Among the factors that influence the separation of compounds by gas chromatography are selection of liquid phase, column temperature, and flow rate of carrier gas.
在气相色层分析期间，影响化合物的分离因素有液相的选择，柱温，载气的流速。
A capillary gas chromatographic method of determining 5 kinds of chlorobenzene compounds in water and wastewater was developed.
建立了一种用气相色谱法测定水和废水中5种氯苯类化合物的方法。
A method of continuously producing reduced compounds, which comprises continuously feeding our oxidised compound into a reaction chamber and contracting the oxidised compound with a reductant gas.
一种连续制备还原态化合物的方法，包括将氧化态化合物连续送入反应室，以及使用还原性气体接触该氧化态化合物。
Instead, plants produce volatile compounds, chemicals that easily change from a liquid to a gas.
但是植物能释放出挥发性化合物，这是一些很容易从液体变成气体的化学物质。
C2H4, derived from natural gas and petroleum and used as a source of many organic compounds, in welding and cutting metals, to color citrus fruits, and as an anesthetic.
乙烯一种无色易燃气体，C2H4，可从天然气和石油中获得，用作许多有机化合物的来源，用于焊接和切割金属，柑桔属水果的着色，以及用作麻醉剂。
One is gas hydrates -white, sorbet-like compounds that usually consist of methane molecules trapped in a cage of water.
一个是气体水合物，这是一种白色的、类似果汁冰糕的混合物，通常由嵌入笼形水结构的甲烷组成。
A catalyst based on non noble metal oxides for catalytic oxidation of volatile organic compounds (VOC) in waste gas has been developed.
研制出用于催化氧化废气中挥发性有机化合物(VOC)的非贵金属氧化物催化剂。
Nibased industrial catalyst has been introduced into hot gas cleanup study for removal of ammonia, coal tar and organic sulfur compounds in high temperature gas.
选用了一种工业镍基催化剂，它具有同时脱除热煤气中氨、有机硫和煤焦油蒸气的多种净化功能，而且能达到较高的净化效率。
Determination method of sulfur compounds in LPG was established by applying gas chromatography with sulfur chemiluminescence detector (GC-SCD) through optimizing the GC condition.
采用气相色谱和硫化学发光检测器(GC -SCD)技术，通过对色谱条件进行优化，建立了液化气中硫化物形态分布的测定方法。
The aromatic compounds of 28 representative China Oolong tea was studied by gas chromatography and mass spectrometry analysis.
采用气相色谱-质谱法对28个中国代表性乌龙茶芳香物质进行了研究。
Gas chromatography-pulsed flame Photometric Detector (GC-PFPD) was used for the qualitative and quantitative analysis of sulfur compounds in several fluid catalytic cracking gasoline.
采用气相色谱-脉冲火焰光度检测器(GC -PFPD)，对几种催化裂化汽油中的硫化物进行了定性和定量研究。
The gas is also produced naturally when bacteria in the soil and oceans break down nitrogen-containing compounds.
土壤及海洋中的细菌分解含氮化合物时，也天然地产生这种气体。
Sulfur compounds in Russian atmospheric gas oil were separated into thiophene and thioether compounds by the oxidation-reduction method using selective oxidant and reducing agent.
采用选择性氧化剂和还原剂对俄罗斯直馏柴油中的硫醚类硫化物和噻吩类硫化物分别进行分离和富集，得到两者的浓缩液。
The volatile organic compounds (VOCs) produced in the laser-sculpture process of bicolor board were studied using cold trap condensation-gas chromatography-mass spectrometry.
研究了冷阱浓缩气相色谱-质谱法检测双色板在激光工艺雕刻过程产生的挥发性有机污染物的组成。
Users can add parameters of other compounds and stationary phases by filling tables provided by the software, so that gas chromatographic analysis of more compounds can be emulated.
此软件为开放式结构，用户只要填写软件所提供的几个表格，就能方便地将化合物及固定相的色谱参数添加到软件中，从而使软件能对更多的化合物进行模拟分析。
The technology that non-thermal plasma cooperating catalyst deals decontaminates volatile organic compounds(VOC) is a new pattern technology in dealing with poisonous and pernicious gas.
低温等离子体协同催化净化挥发性有机物（VOC）的方法是一种新型高效的有毒、有害气体处理技术。
The technology that non-thermal plasma cooperating catalyst deals decontaminates volatile organic compounds(VOC) is a new pattern technology in dealing with poisonous and pernicious gas.
低温等离子体协同催化净化挥发性有机物（VOC）的方法是一种新型高效的有毒、有害气体处理技术。
应用推荐