Results 311 to 320 of about 260,636 (325)
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Water–ice phase transition probed by Raman spectroscopy
Journal of Raman Spectroscopy, 2011AbstractRaman spectroscopy was used to study the liquid–solid water phase transition. Special attention was devoted to the OHstretching band of the Raman spectrum, which shows monotonous changes in the temperature range between 10 and − 15 °C. The interpretation of this spectral change, as well as a careful analysis of its integrated scattered ...
Durickovic, I. +5 more
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Amorphous and crystalline ices studied by dielectric spectroscopy
The Journal of Chemical Physics, 2019This work reports on frequency dependent ambient-pressure dielectric measurements of hyperquenched glassy water, ice IV, ice VI, as well as a CO2-filled clathrate hydrate, the latter featuring a chiral water network. The dipolar time scales and the spectral shapes of the loss spectra of these specimens are mapped out and compared with literature data ...
L. J. Plaga +8 more
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Analysis of Arctic ices by Remote Raman Spectroscopy
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2011A portable remote Raman instrument for field analysis has been developed. This instrument has been tested in the Arctic conditions during AMASE (Arctic Mars Analog Svalbard Expedition) campaigns 2007, 2008 and 2009. Besides its capability for mineral detection the remote system proved to be a very useful tool for ice structural analysis of icebergs and
Fernando, Rull +3 more
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Cycle Resolved Emission Spectroscopy for IC Engines
SAE Technical Paper Series, 1997<div class="htmlview paragraph">The flame radiant emission from internal combustion engines is investigated experimentally by means of a fast spectroscopic measuring technique. This technique enables cycle resolved emission spectroscopy within a single combustion process and was applied to a DI diesel engine.</div> <div class="htmlview ...
C. Antoni, N. Peters
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Laboratory Studies of Astronomical Ices: Reaction Chemistry and Spectroscopy
Accounts of Chemical Research, 2020ConspectusScientists have had evidence for molecules in both comets and interstellar space since the 19th and early 20th centuries. Since then, extraterrestrial molecules ranging from simple diatomics to C70 to amino acids have been detected and identified through remote spectroscopy, spacecraft, and sample return missions. These achievements have been
Christopher K. Materese +2 more
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Spectroscopy and Processing of Interstellar Ice Analogs
AIP Conference Proceedings, 2006Recent results from the Raymond and Beverly Sackler Laboratory for Astrophysics on spectroscopy and processing of interstellar ice analogues are summarized. This includes thermal desorption studies of pure, layered and mixed CO, N2 and O2 ices, and infrared spectroscopy and heating of CO‐CO2, CO‐H2O, CO‐HCOOH, CO‐CH4 and CO‐CH3OH layered and mixed ices.
E. F. van Dishoeck +11 more
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Infrared Spectroscopy of Interstellar Ices
1996The development of our understanding of astrophysical ices depends on the interpretation of relevant astronomical observations with the aid of laboratory data for interstellar ice analogues. This paper aims to give an overview of current research, with emphasis on recent results appearing since my previous review of the topic (Whittet, 1993).
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Ultraviolet Spectroscopy and the Composition of Cometary Ice
Science, 1983Our current knowledge of the composition of the cometary nucleus is largely inferred from observations of the gas and dust comae that are produced by sublimation of cometary ice when a comet is near the sun. During the past decade, far-ultraviolet spectroscopy from above the terrestrial atmosphere has shed new light on the physics and chemistry of the ...
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Ice Nanoparticles and Ice Adsorbate Interactions: FTIR Spectroscopy and Computer Simulations
2003Studies of ice particles can be designed to obtain basic knowledge of ice nanocrystals and large water clusters, or to provide insight to specific properties of macroscopic condensed phase water systems. The latter properties include the nature of the surface of ice and the H-bond chemistry of ice, examined in this chapter, as well as the homogeneous ...
J. Paul Devlin, Victoria Buch
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Neutron Spectroscopy of Vapour Deposited Amorphous Ice
1999Neutron scattering data for low-density amorphous ice, produced by low-temperature and low-rate vapour deposition, shows that the dynamical properties of the vapour deposited amorphous ice are different from other low-density ices.
A. I. Kolesnikov, J.-C. Li
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