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Layer Deposition I
(2003)
Fast, Automated Testing of Different Air Filter Media / Mölter, W. ; Helsper, C. ; Kaminski, S.
(1992)
Fast and Automated Testing of Different Air Filter Media / Mölter, W. ; Helsper, C. ; Kaminski, S.
(1989)
Fast and Automated Testing of Different Air Filter Media / Mölter, W. ; Helsper, C. ; Kaminski, S.
(1989)
Erzeugung von Prüfaerosolen für die Kalibrierung von optischen Partikelmeßverfahren nach VDI 3491
(1989)
Calibration of the Polytec HC-15 and HC-70 Optical Particle Counters / Fißan, H. J. ; Helsper, C.
(1983)
Evaluation of Particle Size Distributions by Means of Particle Counters / Fißan, H. J. ; Helsper, C.
(1979)
It has been observed that carcinogenic polycyclic aromatic hydrocarbons (PAH) are present in the atmosphere. Combustion processes are considered the most important sources for PAH. Among these, the burning of coal produces the highest emission, but in cities with high traffic density and low meteorological exchange activities, vehicle emissions determine the immission situation, especially in narrow streets. For estimating the potential health effects caused by PAH, it is sufficient to characterize the emission of PAH with respect to their physical state, concentrations, and, as far as the particulate phase is concerned, size distribution. The size distribution is important for transport phenomena, inhalation, and deposition in the respiratory tract. These parameters mainly depend on the combustion system, on system operating conditions, on the exhaust system, and on exhaust cooling conditions. At exhaust-gas temperatures in the range of ambient air temperatures, almost the whole emission of PAH is made up of particulate matter.
Comparison of solar hot water systems in solar settlements - decentralized or centralized systems?
(2004)
Books Reviewed - European Democratization since 1800 edited by J. Garrard, V. Tolz and R. White
(2000)
The role of Germany, Japan and the United States on the ECU-bond markets / Hans Wilhelm Mackenstein
(1991)
Side-bands in ¹⁸⁰ Os
(1981)