Topic
Vapours
About: Vapours is a research topic. Over the lifetime, 1153 publications have been published within this topic receiving 15022 citations.
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TL;DR: In this paper, the authors show that 20% to 56% of the users' responses were negative, while the remaining 80% were positive. But they did not specify the percentage of negative responses.
Abstract: 環境分析技術協議会会員33機関による作業環境中の有機溶剤測定法の共同実験を行った.2~3成分の溶剤蒸気を含む合成試料8種類を調製し,これを活性炭管法で採取したものを分析試料とした.4回の実験でメタノール,酢酸エチル,メチルエチルケトン,ベンゼン,トルエン,パラキシレンの6成分の活性炭管での回収率を調べた結果,メタノール,メチルエチルケトンでは平均20%と56%でかなり悪いが,他の成分はいずれもほぼ完全に回収できた.又,活性炭管に採取した試料は1週間後でも変化せず保存性はすべての成分について良好であった.GC分析における誤差要因として検量線の変動を検討し,特に試料注入量の変動と偏りが大きいことを確かめた.更にマイクロシリンジを用いた標準液調製法の精度を検討して良好な結果を得た.
4 citations
TL;DR: In this article, it was shown that clusters of three and four sodium atoms, which have exceptionally low ionization potentials, may make contributions to the conductivity out of all proportion to their concentrations, to the extent that under nearsaturated conditions their influence could predominate by an order of magnitude.
Abstract: The electrical conductivity of sodium vapour at pressures above 10 torr cannot be calculated satisfactorily on the assumption that the vapour is monatomic. A theoretical assessment shows that clusters of three and four sodium atoms, which have exceptionally low ionization potentials, may make contributions to the conductivity out of all proportion to their concentrations, to the extent that under nearsaturated conditions their influence could predominate by an order of magnitude. The conclusions of this paper apply to all alkali metal vapours, and possibly to other metallic vapours also.
4 citations
Journal Article•
TL;DR: In this article, a porous silicon sensor was investigated as a means to determine the response specificity for organic vapours, and the sensors recorded various changes in resistivity for various organic compounds.
Abstract: A porous silicon sensor was investigated as a means to determine the response specificity for organic vapours. Porous silicon layers were fabricated by electrochemical anodization of p-type crystalline silicon in an HF ethanol solution under various conditions. The porous silicon sensors were placed in a gas chamber with various organic vapours, and the changes in electrical resistance under constant voltage of each sensor were used as detection signals. The sensors recorded various changes in resistivity for various organic vapours.
4 citations
Patent•
28 Apr 1998
TL;DR: In this paper, material vapours on the cathode spot do not reach the substrate along a direct path, but must pass through a hot anode positioned in front of the substrate.
Abstract: The method concerns precipitation of material vapours produced by a vacuum arc evaporation process, onto a substrate in a chamber under reduced pressure. The material vapours on the cathode spot (5) do not reach the substrate (5) along a direct path, but must pass through a hot anode (1) positioned in front of the substrate. As a result of interaction with the hot anode walls, the material vapour is subjected to re-evaporation one or more times during its passage through this anode. A heatable anode (1) surrounds the face of the cathode (2) which has internal baffle plates (1b) and an opening (1a) directed towards the substrate.
4 citations
01 Jan 1980
TL;DR: In this paper, the authors deal with the thermodynamic analysis of an ammonia-water intermittent solar refrigerator that uses a simple flat plate collector for generation of ammonia vapours from the ammonia water solution.
Abstract: The intermittent solar refrigerator consists of three major components, generator-cum-absorber. rectifier and condenser-cum-evaporator. During the generation process vapours pass through the rectifier and are condensed in the condenser. During the refrigeration process vaporising liquid ammonia in the evaporator provides cooling and the vapours are absorbed by the weak solution in the absorber. The paper deals with the thermodynamic analysis of an ammonia-water intermittent solar refrigerator that uses a simple flat plate collector for generation of ammonia vapours from the ammonia-water solution. The processes that constitute the cycle have been simulated on a digital computer. For different initial solution concentrations and generator temperatures the following parameters have been evaluated and discussed. 1) Heat absorbed during generation. 2) Amount of vapours generated and the amount of ammonia condensed. 3) Minimum evaporator temperature. 4) Effective refrigeration and 5) Coefficient of performance.
4 citations