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排序方式: 共有56条查询结果,搜索用时 15 毫秒
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Bergmann A Bi Y Chen L Floehr T Henkelmann B Holbach A Hollert H Hu W Kranzioch I Klumpp E Küppers S Norra S Ottermanns R Pfister G Roß-Nickoll M Schäffer A Schleicher N Schmidt B Scholz-Starke B Schramm KW Subklew G Tiehm A Temoka C Wang J Westrich B Wilken RD Wolf A Xiang X Yuan Y 《Environmental science and pollution research international》2012,19(4):1341-1344
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Scahill J Wolfrum EJ Michener WE Bergmann M Blake DM Watt AS 《Journal of the Air & Waste Management Association (1995)》2004,54(1):105-110
The use of sorbents has been proposed to remove volatile organic compounds (VOCs) present in ambient air at concentrations in the parts-per-billion (ppb) range, which is typical of indoor air quality applications. Sorbent materials, such as granular activated carbon and molecular sieves, are used to remove VOCs from gas streams in industrial applications, where VOC concentrations are typically in the parts-per-million range. A method for evaluating the VOC removal performance of sorbent materials using toluene concentrations in the ppb range is described. Breakthrough times for toluene at concentrations from 2 to 7500 ppb are presented for a hydrophobic molecular sieve at 25%) relative humidity. By increasing the ratio of challenge gas flow rate to the mass of the sorbent bed and decreasing both the mass of sorbent in the bed and the sorbent particle size, this method reduces the required experimental times by a factor of up to several hundred compared with the proposed American Society of Heating, Refrigerating, and Air-Conditioning Engineers method, ASHRAE 145P, making sorbent performance evaluation for ppb-range VOC removal more convenient. The method can be applied to screen sorbent materials for application in the removal of VOCs from indoor air. 相似文献
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P. Niggli I. Koppel Herbert Schotte W. Noddack Alfred Coehn M. Bergmann 《Die Naturwissenschaften》1923,11(23):449-452
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This paper reports on a study of interpersonal conflicts in the workplace using a process model proposed by Thomas (1992) as a framework. Three stages of this model are examined: the issues involved, the behavioral responses elicited, and the personal consequences. The relationship of issues and behaviors to consequences is determined within the context of the organizational positions of the parties (supervisor, subordinate, co-worker). 相似文献
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Phosphine by bio-corrosion of phosphide-rich iron 总被引:1,自引:0,他引:1
Dietmar Glindemann Frank Eismann Armin Bergmann Peter Kuschk Ulrich Stottmeister 《Environmental science and pollution research international》1998,5(2):71-74
Phosphine is a toxic agent and part of the phosphorus cycle. A hitherto unknown formation mechanism for phosphine in the environment was investigated. When iron samples containing iron phosphide were incubated in corrosive aquatic media affected by microbial metabolites, phosphine was liberated and measured by gas chromatography. Iron liberates phosphine especially in anoxic aquatic media under the influence of sulfide and an acidic pH. A phosphine-forming mechanism is suggested: Phosphate, an impurity of iron containing minerals, is reduced abioticly to iron phosphide. When iron is exposed to the environment (e.g. as outdoor equipment, scrap, contamination in iron milled food or as iron meteorites) and corrodes, the iron phosphide present in the iron is suspended in the medium and can hydrolyze to phosphine. Phosphine can accumulate to measurable quantities in anoxic microbial media, accelerating corrosion and preserving the phosphine formed from oxidation. 相似文献