European Conference on Laboratory Astrophysics - ECLA
نویسندگان
چکیده
Interstellar water ice is mainly amorphous, but the nature of its morphology still remains poorly known. The experimental study described in this work focuses on how relevant changes of the ice morphology result from atomic hydrogen exposure and subsequent recombination. We show that there is an exponential decrease in the porosity of the amorphous water ice sample following hydrogen-atom irradiation. These and other laboratory results lead us to suggest that water ice in space is almost certainly amorphous and non-porous (compact).
منابع مشابه
A challenge to the metabolic approach to myocardial ischaemia.
The negative results of glucose-insulin-potassium (GIK) in the very large CREATE-ECLA trial that studied 20,201 patients with ST-elevation acute myocardial infarction (AMI), are disappointing and warrant thorough evaluation. We attempt to put the new data into perspective and uncover the serious flaws in the trial design, otherwise the whole metabolic concept will be disparaged. The crucial iss...
متن کاملThe Macho Project Large Magellanic Cloud Variable Star Inventory. Xiii. Fourier Parameters for the First Overtone Rr Lyrae Variables and the Lmc Distance
Shapes of RR Lyrae light curves can be described in terms of Fourier coefficients which past research has linked with physical characteristics such as luminosity, mass Department of Physics and Astronomy, University of Pennsylvania, PA 19104 Lawrence Livermore National Laboratory, Livermore, CA 94550 Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, Mailcode 5247, Ne...
متن کاملDiscovery of a Supernova Explosion at Half the Age of the Universe and its Cosmological Implications
E. O. Lawrence Berkeley National Laboratory, Berkeley, California, USA Center for Particle Astrophysics, U.C. Berkeley, California, USA Dipartmento di Astronomia, University de Padova, Italy Space Sciences Laboratory, U.C. Berkeley, California, USA Institute of Astronomy, Cambridge, United Kingdom CNRS-IN2P3, University of Paris, Paris, France Observatoire de Strasbourg, Strasbourg, France Spac...
متن کاملNo room for radiant dreams in the real world.
UK). Eur Heart J 2000; 21: 1450. [3] Boersma E, Pieper KS, Steyerberg EW et al. Predictors of outcome in patients with acute coronary syndromes without persistent ST-segment elevation. Results from an international trial of 9461 patients. The PURSUIT Investigators. Circulation 2000; 101: 2557–67. [4] Cohen MG, Pacchiana CM, Corbalan R et al. Variation in patient management and outcomes for acut...
متن کاملHepatic effects of lung-protective pressure-controlled ventilation and a combination of high-frequency oscillatory ventilation and extracorporeal lung assist in experimental lung injury
BACKGROUND Ventilation with high positive end-expiratory pressure (PEEP) can lead to hepatic dysfunction. The aim of this study was to investigate the hepatic effects of strategies using high airway pressures either in pressure-controlled ventilation (PCV) or in high-frequency oscillatory ventilation (HFOV) combined with an arteriovenous extracorporeal lung assist (ECLA). MATERIAL/METHODS Pie...
متن کامل