Results 31 to 40 of about 260,636 (325)

Ice Nucleation Properties of Ice-binding Proteins from Snow Fleas

Biomolecules, 2019
Ice-binding proteins (IBPs) are found in many organisms, such as fish and hexapods, plants, and bacteria that need to cope with low temperatures. Ice nucleation and thermal hysteresis are two attributes of IBPs.
Akalabya Bissoyi, Naama Reicher, Michael Chasnitsky, Sivan Arad, Thomas Koop, Yinon Rudich, Ido Braslavsky   +6 more
doaj   +1 more source

Ices in Star-Forming Regions: First Results from VLT-ISAAC [PDF]

, 2001
The first results from a VLT-ISAAC program on L- and M-band infrared spectroscopy of deeply-embedded young stellar objects are presented. The advent of 8-m class telescopes allows high S/N spectra of low-luminosity sources to be obtained.
Alves, J.F., Boogert, A. C. A., D'Hendecourt, L. B., Dartois, E., Demyk, K., Dishoeck, E. F. van, Ehrenfreund, P., Keane, J., McCaughrean, M.J., Pontoppidan, K., Schütte, W. A., Thi, W.F., Tielens, A. G. G. M.   +12 more
core   +2 more sources

Depositional ice nucleation on solid ammonium sulfate and glutaric acid particles [PDF]

Atmospheric Chemistry and Physics, 2010
Heterogeneous ice nucleation on solid ammonium sulfate and glutaric acid particles was studied using optical microscopy and Raman spectroscopy. Optical microscopy was used to detect selective nucleation events as water vapor was slowly introduced into an
K. J. Baustian, M. E. Wise, M. A. Tolbert   +2 more
doaj  

The new frontier of microstructural impurity research in polar ice

Annals of Glaciology, 2023
Deciphering the localisation of solid and dissolved impurities on the micron-scale in glacial ice remains a challenge, but is critical to understand the integrity of ice core records and internal deformation.
Nicolas Stoll, Pascal Bohleber, Remi Dallmayr, Frank Wilhelms, Carlo Barbante, Ilka Weikusat   +5 more
doaj   +1 more source

Quantification of segregation dynamics in ice mixtures

, 2009
(Abridged) The observed presence of pure CO2 ice in protostellar envelopes is attributed to thermally induced ice segregation, but a lack of quantitative experimental data has prevented its use as a temperature probe. Quantitative segregation studies are
Bergin, Bergin, Bernstein, Bouwman, Chiar, Collings, Collings, Cuppen, Dartois, E. C. Fayolle, E. F. van Dishoeck, Ehrenfreund, Ehrenfreund, Fuchs, Garrod, Gerakines, Gerakines, Gerakines, H. Linnartz, H. M. Cuppen, Hodyss, Ioppolo, Jenniskens, K. I. Öberg, Knez, Loeffler, Los, Los, Merrill, Nummelin, Palumbo, Pontoppidan, Pontoppidan, Sandford, Sonnentrucker, Teolis, Tielens, van Broekhuizen, Visser, Watanabe, Watanabe, Zasowski, Öberg, Öberg   +43 more
core   +1 more source

Dependence of the Ice Formation Activity of Dioxynaphthalenes, Fluoroglucin and Silver Iodide on the Structure of the Hydrate Shells of Their Crystals

Adsorption Science & Technology, 1999
The 1 H NMR spectroscopy of frozen suspensions has been used to investigate the hydrate shells of Agl, fluoroglucin (FG) and dioxynaphthalenes (DON). It has been shown that the ice formation activity (IFA) of the above compounds may be correlated with ...
V.V. Turov, A.V. Turov, A.V. Arkharov
doaj   +1 more source

CO$_2$ Infrared Phonon Modes in Interstellar Ice Mixtures

, 2016
CO$_2$ ice is an important reservoir of carbon and oxygen in star and planet forming regions. Together with water and CO, CO$_2$ sets the physical and chemical characteristics of interstellar icy grain mantles, including desorption and diffusion energies
Cooke, Ilsa R., Fayolle, Edith C., Öberg, Karin I.   +2 more
core   +1 more source

The State of CO and CO2 Ices in the Kuiper Belt as Seen by JWST

The Planetary Science Journal, 2023
JWST has shown that CO _2 and CO are common on the surfaces of objects in the Kuiper Belt and have apparent surface coverages even higher than that of water ice, though water ice is expected to be significantly more abundant in the bulk composition ...
Michael E. Brown, Wesley C. Fraser
doaj   +1 more source

Multiproxy investigation of the last 2,000 years BP marine paleoenvironmental record along the western Spitsbergen margin

Arctic, Antarctic, and Alpine Research, 2022
A reconstruction of the last 2,000 years BP of environmental and oceanographic changes on the western margin of Spitsbergen was performed using a multidisciplinary approach including the fossil assemblages of diatoms, planktic and benthic foraminifera ...
Fiorenza Torricella, Viviana Maria Gamboa Sojo, Karen Gariboldi, Nessim Douss, Maria Elena Musco, Chiara Caricchi, Renata Giulia Lucchi, Katia Carbonara, Caterina Morigi   +8 more
doaj   +1 more source

Water formation at low temperatures by surface O2 hydrogenation I: characterization of ice penetration

, 2010
Water is the main component of interstellar ice mantles, is abundant in the solar system and is a crucial ingredient for life. The formation of this molecule in the interstellar medium cannot be explained by gas-phase chemistry only and its surface ...
Acharyya, Atkinson, Baulch, Bennett, Boogert, C. Romanzin, Cooper, Cuppen, Dartois, Dulieu, d’Hendecourt, E. F. van Dishoeck, Ehrenfreund, Fraser, Fuchs, Gerakines, Gibb, Gillett, H. Linnartz, H. M. Cuppen, Hasegawa, Hasegawa, Hidaka, Hiraoka, Ioppolo, Keyser, Kreutz, Loeffler, Matar, Miyauchi, Mokrane, Oba, Romanzin, S. Ioppolo, Teolis, Tielens, Troe, Tschersich, Tschersich, Tschersich, Watanabe   +40 more
core   +1 more source