Results 41 to 50 of about 260,252 (303)

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

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  

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

Near-infrared Spectroscopy for Remote Sensing of Porosity, Density, and Cubicity of Crystalline and Amorphous H2O Ices in Astrophysical Environments

The Astrophysical Journal
We present laboratory spectra of pure amorphous and crystalline H _2 O ices in the near-infrared (NIR, 1–2.5 μ m/10,000–4000 cm ^−1 ) at 80–180 K.
Christina M. Tonauer, Eva-Maria Köck, Raphael Henn, Josef N. Stern, Leonardo del Rosso, Milva Celli, Christoph Kappacher, Sophia Leiter, Christian G. Kirchler, Christian W. Huck, Thomas Loerting   +10 more
doaj   +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

Cold gas as an ice diagnostic toward low mass protostars

, 2009
Up to 90% of the chemical reactions during star formation occurs on ice surfaces, probably including the formation of complex organics. Only the most abundant ice species are however observed directly by infrared spectroscopy.
Bachiller, Bergin, Bisschop, Boogert, Bottinelli, Buckle, Caselli, E. F. van Dishoeck, Evans, Garrod, Gibb, Girart, Goldsmith, K. I. Öberg, Léger, Maret, Pontoppidan, Requena-Torres, S. Bottinelli, Schöier, Shen, Turner, van Broekhuizen, Westley, Whittet   +24 more
core   +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

Elastic Constants of Ice by Brillouin Spectroscopy [PDF]

Journal of Glaciology, 1980
AbstractBrillouin spectroscopy has been used to measure the adiabatic elastic constants of laboratory-grown pure monocrystalline ice Ih at – 3°C. The values obtained were (in units of 108 N/m2): c11 = 136.96 ±0.60, c12 = 69.66± 0.45, c13 = 56.28±0.31, c33 = 147.02±0.68, c44 = 29.59±0.15. Comparison of these values with ultrasonic measurements quoted in
P. H. Gammon, H. Kiefte, M. J. Clouter
openaire   +1 more source

The planar cell polarity protein Vangl2 interacts with the PDZ‐domains of Scribble but not with a unique PDZ‐like domain in Inturned

FEBS Letters, EarlyView.
Structural and biochemical characterisations show that the planar cell polarity (PCP) protein Inturned harbours a unique PDZ‐like domain that does not bind canonical PDZ‐binding motifs (PBMs) like that of another PCP protein Vangl2. In contrast, the apical‐basal polarity protein Scribble contains four PDZ domains that bind Vangl2, but one PDZ domain ...
Stephan Wilmes, Jan Brysch, Carmen Gelze, Lilli Meier, Daniel Kümmel   +4 more
wiley   +1 more source

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