Results 61 to 70 of about 740,577 (309)
The Chernobyl Reference Horizon (?) in the Greenland Ice Sheet [PDF]
, 1989 Published reports of the presence of radioactive debris from the Chernobyl reactor accident in snow on the Greenland ice sheet raised the strong prospect that such debris might constitute a valuable time stratigraphic marker all over the ice sheet. Large
Dibb, Jack E.
core +2 more sources
Cell wall target fragment discovery using a low‐cost, minimal fragment library
FEBS Letters, EarlyView.LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan +5 more
wiley +1 more source
Investigation of HNCO isomers formation in ice mantles by UV and thermal processing: an experimental approach [PDF]
, 2014 Current gas phase models do not account for the abundances of HNCO isomers detected in various environments, suggesting a formation in icy grain mantles.
Caro, G. M. Muñoz +4 more
core +1 more source
Chemistry of Greenland Ice Sheet studied
Eos, Transactions American Geophysical Union, 1991 The first ice coring project to include a major emphasis on the study of atmospheric processes and changes in the Greenland Ice Sheet that influence the chemistry of the ice core began in April of this year under the auspices of the Greenland Ice Sheet Project Two (GISP2).
Jean‐Luc Jaffrezo +2 more
openaire +1 more source
FEBS Letters, EarlyView.We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee +3 more
wiley +1 more source
Mechanism for the subglacial formation of cryogenic brines
Annals of Glaciology, 2022 Cryogenic brines are under-studied, despite the fact that they may contain information about past ice-sheet behavior. Cryogenic brines form through cryoconcentration of seawater, although the specific setting and mechanism of formation have been debated.
Sarah U. Neuhaus, Slawek M. Tulaczyk
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 +43 more
core +1 more source
Polar ices chemistry: a past atmosphere reflection [PDF]
La Houille Blanche, 1995 Dans ce papier, les auteurs presentent une etude de la composition chimique des impuretes contenues dans les glaces polaires et l'interpretation de ces donnees en termes de composition chimique de notre atmosphere passee. Cette etude glaciochimique portera essentiellement sur les especes solubles minerales (Na + , NH 4 + , K + , Ca ++ , Mg ++ , H ...
M. Legrand, R. Delmas
openaire +1 more source
FEBS Letters, EarlyView.We identified a systemic, progressive loss of protein S‐glutathionylation—detected by nonreducing western blotting—alongside dysregulation of glutathione‐cycle enzymes in both neuronal and peripheral tissues of Taiwanese SMA mice. These alterations were partially rescued by SMN antisense oligonucleotide therapy, revealing persistent redox imbalance as ...
Sofia Vrettou, Brunhilde Wirth
wiley +1 more source
Geological and glacial-hydrologic controls on chemical weathering in the subglacial environment
Annals of Glaciology, 2022 A comparison of major ion chemistry of subglacial boreholes and discharging subglacial waters reveals three fundamentally different glacier hydrochemical regimes.
Joseph A. Graly, Soroush Rezvanbehbahani
doaj +1 more source