نتایج جستجو برای: vapour

تعداد نتایج: 8882  

Journal: :Environmental science. Processes & impacts 2015
Dietmar Breuer George C Dragan Claudia Friedrich Carsten Möhlmann Ralf Zimmermann

The sampling of semi volatiles (SV) in workplaces may lead to different results as measurements may be affected by sampling bias. The new European Standard EN 13936 defines "semi-volatiles" as substances with vapour pressures in the range between 0.001 and 100 Pa at room temperature. EN 13936 regulates the basic requirements for SV compounds that can occur as vapour and particle at the same tim...

2008
M. R. Carleer C. D. Boone C. T. McElroy J. R. Drummond D. G. Dufour

1 Service de Chimie Quantique et Photophysique, Université Libre de Bruxelles, Brussels, Belgium 2 Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada 3 Department of Physics, University of Toronto, Toronto, Ontario, Canada 4 Department of Chemistry, University of York, UK 5 Department of Physics and Astronomy, University of Western Ontario, London, Ontario, Canada 6 Labo...

Journal: :Chemical communications 2007
Sarah L Masters Duncan A Grassie Heather E Robertson Margit Hölbling Karl Hassler

The vapour produced upon mild heating of hexa-tert-butyldisilane (superdisilane) has been studied by gas electron diffraction and ab initio molecular orbital calculations; the disilane is not observed in the vapour, and the observed radical structure is not the lowest energy structure predicted ab initio.

2003
Resonator A. F. Holloway A. Nabok M. Thompson A. K. Ray D. Crowther J. Siddiqi

The Impedance analysis technique complemented with curve fitting software was used to monitor changes in film properties of Thickness Shear Mode (TSM) resonator on vapour exposure. The approach demonstrates how sensor selectivity can be achieved through unique changes in film viscosity caused by organic vapour adsorption.

2005
A. Ranjit Prakash S. Adamia V. Sieben P. Pilarski L. M. Pilarski

In this paper we demonstrate a new method for microfabricating PDMS devices that controls vapour diffusion, thereby reducing water loss at elevated temperatures and greatly increasing the reliability of the PCR. In the past, the vapour and liquid diffusion properties of the P t b m t t ©

2008
Zhenhong Li

Atmospheric water vapour effects represent a major limitation of repeat-pass Interferometric SAR (InSAR) techniques including InSAR time series approaches (e.g. permanent scatterers (PS) and small baseline subset (SBAS)). In this paper, it is demonstrated that atmospheric water vapour effects greater than 4 cm can be observed even in desert regions (e.g. Southern California) and the use of MERI...

2014
S. Groß M. Wirth A. Schäfler A. Fix S. Kaufmann C. Voigt

Aerosol and water vapour measurements were performed with the lidar system WALES of Deutsches Zentrum für Luftund Raumfahrt (DLR) in October and November 2010 during the first mission with the new German research aircraft G55-HALO. Curtains composed of lidar profiles beneath the aircraft show the vertical and horizontal distribution and variability of water vapour mixing ratio and backscatter r...

Journal: :Nature Energy 2019

2001
Erik Olsen Frands Nielsen

The use of organic compounds in the European Union will in the future be regulated in accordance with the Council Directive 1999/13/EC of 11 March 1999 [1]. In this directive, any organic compound is considered to be a volatile organic compound (VOC) if it has a vapour pressure of 10 Pa or more at 20C, or has a corresponding volatility under the particular condition of use. Introduction of such...

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