Low-temperature secondary emission mass spectrometric investigations of a condensed-phase environment of biologically significant compounds

2021 ◽  
Vol 47 (4) ◽  
pp. 335-346
Author(s):  
Marina V. Kosevich ◽  
Oleg A. Boryak ◽  
Vadim S. Shelkovsky
Keyword(s):  
Low Temperature ◽  
Condensed Phase ◽  
Secondary Emission ◽  
Mass Spectrometric

Mass-spectrometric observation of a condensed-phase transition during effusion of gallium sesquisulfide

1997 ◽  
Vol 297 (1-2) ◽  
pp. 177-185 ◽  
Author(s):  
Jimmie G. Edwards ◽  
Pannee Mukdeeprom-Burckel ◽  
Klaus Hilpert ◽  
Dieter Kath
Keyword(s):  
Phase Transition ◽  
Condensed Phase ◽  
Mass Spectrometric

Low Temperature Resonant Secondary Emission in $\bf CuGaS_{2}$ by Γ Point Excitation

1995 ◽  
Vol 34 (Part 1, No. 6A) ◽  
pp. 3019-3022 ◽  
Author(s):  
Nobuyuki Yamamoto ◽  
Masatake Kitakuni ◽  
Masami Susaki
Keyword(s):  
Low Temperature ◽  
Secondary Emission

ChemInform Abstract: Mass-Spectrometric Observation of a Condensed-Phase Transition During Effusion of Gallium Sesquisulfide.

ChemInform ◽  
2010 ◽  
Vol 28 (47) ◽  
pp. no-no
Author(s):  
J. G. EDWARDS ◽  
P. MUKDEEPROM-BURCKEL ◽  
K. HILPERT ◽  
D. KATH
Keyword(s):  
Phase Transition ◽  
Condensed Phase ◽  
Mass Spectrometric

scholarly journals Modelling the effect of condensed-phase diffusion on the homogeneous nucleation of ice in supercooled water

2019 ◽  
Author(s):  
Kathryn Fowler ◽  
Paul Connolly ◽  
David Topping
Keyword(s):  
Low Temperature ◽  
Aerosol Particle ◽  
Condensed Phase ◽  
Homogeneous Nucleation ◽  
Supercooled Water ◽  
Organic Aerosol ◽  
Ice Nucleation ◽  
Cirrus Clouds ◽  
Climate Modelling ◽  
Phase Diffusion

Abstract. In-situ studies of low temperature cirrus clouds have found unexpectedly low ice crystal numbers and consistently high supersaturations, which suggest that our understanding of the freezing mechanisms under these conditions are incomplete. Computational models typically use homogeneous nucleation to predict the ice nucleated in supercooled water. However, the existence of ultra-viscous organic aerosol in the upper troposphere has offered alternative ice nucleation pathways, which have been observed in laboratory studies. The possible effects of aerosol viscosity on cloud micro-physical properties have traditionally been interpreted from simple model simulations of an individual aerosol particle based on equilibration timescales. In this study, to gain insight into the formation of ice in low temperature cirrus clouds, we have developed the first cloud parcel model with bin micro-physics to simulate condensed phase diffusion through each individual aerosol particle. Our findings demonstrate, for the first time, the complex relationship between the rate of ice formation and the viscosity of secondary organic aerosol, driven by two competing effects – which cannot be explained using existing modelling approaches. The first is inhibition of homogeneous ice nucleation below 200 K, due to restricted particle growth and low water volume. The second occurs at temperatures between 200 K and 220 K, where water molecules are slightly more mobile and a layer of water condenses on the outside of the particle, causing an increase in the number of frozen aerosol particles. Our new model provides a basis to better understand and simulate cirrus cloud formation on a larger scale, addressing a major source of uncertainty in climate modelling through the representation of cloud processes.

Mass spectrometric characterization of performance of a low-temperature oxidation catalyst

1990 ◽  
Vol 60 (3) ◽  
pp. 389-398 ◽  
Author(s):  
Chen C. Hsu ◽  
Charles S. Dulcey ◽  
James S. Horwitz ◽  
Ming C. Lin
Keyword(s):  
Low Temperature ◽  
Mass Spectrometric ◽  
Oxidation Catalyst ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation
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