Results 61 to 70 of about 4,479,560 (350)

Phase equilibrium of liquid water and hexagonal ice from enhanced sampling molecular dynamics simulations

, 2020
We study the phase equilibrium between liquid water and ice Ih modeled by the TIP4P/Ice interatomic potential using enhanced sampling molecular dynamics simulations.
Car, Roberto, Piaggi, Pablo M.
core   +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

The first firn core from Peter I Island – capturing climate variability across the Bellingshausen Sea [PDF]

Climate of the Past
Peter I Island is situated in the Bellingshausen Sea, a region that has experienced considerable climate change in recent decades. Warming sea surface temperatures and reduced sea ice cover have been accompanied by warming surface air temperature ...
E. R. Thomas, D. Tetzner, B. Markle, B. Markle, J. Pedro, J. Pedro, G. Gacitúa, D. E. Moser, D. E. Moser, S. Jackson   +9 more
doaj   +1 more source

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

Morphology and Dynamics of Ice Rises [PDF]

Journal of Glaciology, 1980
AbstractProfile surveys are presented of four ice rises on the east coast of the Antarctic Peninsula. On Butler Island velocity measurements were also made. The ice rises behave as miniature ice caps frozen to flat horizontal bedrock and provide a simple system for the study of laws of ice flow. Deformation is principally by shear through the ice mass.
Martin, P.J., Sanderson, T. J.O.
openaire   +2 more sources

Dark ice dynamics of the south-west Greenland Ice Sheet

, 2017
. Runoff from the Greenland Ice Sheet (GrIS) has increased in recent years due largely to changes in atmospheric circulation and atmospheric warming. Albedo reductions resulting from these changes have amplified surface melting.
A. Tedstone, J. Bamber, J. Cook, C. Williamson, X. Fettweis, A. Hodson, M. Tranter   +6 more
semanticscholar   +1 more source

Subglacial processes on an Antarctic ice stream bed. 2: Can modelled ice dynamics explain the morphology of mega-scale glacial lineations?

Journal of Glaciology, 2016
Mega-scale glacial lineations (MSGLs) are highly elongate subglacial bedforms associated with ice streaming. However, the link between MSGLs and rapid ice flow is largely qualitative, and there have been few attempts to quantitatively link their ...
S. Jamieson, C. Stokes, S. Livingstone, A. Vieli, C. Ó Cofaigh, C. Hillenbrand, M. Spagnolo   +6 more
semanticscholar   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Timing of the Recent Migration and Intensification of the Southern Hemisphere Westerly Winds

Geophysical Research Letters
In recent decades, the Southern Hemisphere westerly winds have strengthened and migrated south, attributed to greenhouse gas emissions and stratospheric ozone depletion. However, the onset and acceleration of these drivers is coincident with the start of
Dieter R. Tetzner, Claire S. Allen, Elizabeth R. Thomas, Eric W. Wolff, Christian L. E. Franzke   +4 more
doaj   +1 more source

Bromine, iodine and sodium in surface snow along the 2013 Talos Dome–GV7 traverse (northern Victoria Land, East Antarctica) [PDF]

The Cryosphere, 2017
Halogen chemistry in the polar regions occurs through the release of halogen elements from different sources. Bromine is primarily emitted from sea salt aerosols and other saline condensed phases associated with sea ice surfaces, while iodine is affected
N. Maffezzoli, A. Spolaor, C. Barbante, M. Bertò, M. Frezzotti, P. Vallelonga   +5 more
doaj   +1 more source