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  gas
Cauchy problem for linearized system of two-dimensional isentropic flow with axisymmetrical initial data in gas dynamics
      
The explicit solution to Cauchy problem for linearized system of two-dimensional isentropic flow with axisymmetrical initial data in gas dynamics is given.
      
Photocatalytic Oxidation of Aniline in the Gas Phase Using Porous TiO2 Thin Films
      
The gas-phase photocatalytic oxidation of aniline on a new kind of porous nano-TiO2 composite films is investigated.
      
Acetone solution-casting films of poly(methylmethacrylate) were analyzed by differential scanning calorimetry and pyrolysis gas chromatography-mass spectroscopy under natural evaporation and ultrasonic vibration, respectively.
      
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  toxic gas
OES analysis in a nonthermal plasma used for toxic gas removal: Rotational and excitation temperature estimation
      
Atmospheric contamination by a toxic gas (hydrogen sulfide) is described.
      
Hydrogen sulfide (H2S) is a well-known toxic gas with the smell of rotten eggs.
      
Pulmonary barotrauma including orbital emphysema following inhalation of toxic gas
      
Severe pulmonary barotrauma occurred following smoke and toxic gas inhalation in a 20-year-old male.
      
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  poisonous gas
The impact of an asteroid exceeding tens of meters in size may cause both a tsunami wave and a catastrophic poisonous gas release in the atmosphere.
      
One is the direct approach, which applies the atmospheric dispersion model to compute the concentration of poisonous gas and then, the risk value.
      
Access to pipe cables is often via manholes and hazards that exist include; explosive gas mixtures, poisonous gas mixtures, deep water and insects.
      
A colourless, odourless, poisonous gas which is produced when fossil fuels are burned and there is a lack of air available.
      
A colorless, odorless, non-poisonous gas that is a normal part of the ambient air.
      
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  poison gas
The former workers at the Okunojima poison gas factory (poison gas workers) are a high-risk group for malignant neoplasms and show abnormalities in cellular immunity.
      
At the same time, poison gas workers often have chronic respiratory diseases, such as chronic bronchitis, and are highly susceptible to respiratory infections.
      
To explore the possibility of immunological cancer prevention, we have periodically administered 200 μgNocardia rubra cell-wall skeleton (N-CWS) to poison gas workers once every 3 months since December 1978.
      
During this period, we noted a significantly lower incidence of influenza among poison gas workers receiving N-CWS than in those not receiving the drug during the influenza epidemic.
      
Therefore, periodical administration of N-CWS to poison gas workers was considered to enhance the reduced T-cell function of normalizing antibody production by stimulating the production of B-cell-stimulatory factor (BSF).
      
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  其他


The evaporation characteristic of N 2O 4 and UDMH propellant in the air was disscussed The calculating model of the evaporation rate were introduced The experiment result and the model calculating result were basically identical

正确评估火箭爆炸后残留于地面的有毒推进剂形成的毒气的危害范围 ,关键问题之一是弄清楚渗入泥土中有毒推进剂的蒸发规律。介绍了 N2 O4/ UDMH推进剂在大气中蒸发的实验研究结果以及一种推进剂蒸发速率计算数学模型 ,实验结果与模型计算结果基本一致

If an explosion of a liquid rocket takes place,the poisonous propellant will be disseminated in the ground and cause the air serious pollution.This paper put forward a model of evaporation and dissipation about the poisonous propellant in the ground,and advanced a method of estimating dissipative distance of poisonous gas.

本文针对发射场可能出现的安全问题 ,提出了运载火箭爆炸后有毒推进剂蒸发、扩散模型和毒气危害安全距离估算方法。利用有关算例 ,估算了毒气危害安全距离 ,与实验结果进行对比 ,文中计算结果与实验结果基本一致。作者根据实际经验 ,提出了在实验中测量毒气浓度时应注意的几个问题。

The datum of propellant on pollution were provided for establishing the documents on the safety of a launching pad.The experiments that the propellant of N 2O 4 and UDMH were exploded were accomplished,and the full and accurate datum were gained on poisonous gas diffusing upon the ground.The advanced equation estimating the weight of remnant propellant and the polluted area on the ground if a liquid rock explodes would be available.

为航天发射场安全技术文件的制定提供推进剂污染方面的数据 ,进行了四氧化二氮 (N2 O4 )和偏二甲肼 (UDMH)爆炸实验研究 ,获得了地面推进剂残余量和毒气扩散的实验测量数据 ,提出的液体火箭爆炸地面上推进剂污染范围和残余量等参数的计算公式可以用于工程估算。

 
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