Results 41 to 50 of about 23,695 (309)

Geochemical Features of Ground Ice from the Faddeevsky Peninsula Eastern Coast (Kotelny Island, East Siberian Arctic) as a Key to Understand Paleoenvironmental Conditions of Its Formation

Land, 2023
Understanding paleoenvironmental conditions of the permafrost formation allows us to estimate the permafrost carbon pool and its behavior upon thawing in a changing climate.
Anfisa Pismeniuk, Petr Semenov, Alexandra Veremeeva, Wei He, Anna Kozachek, Sergei Malyshev, Elizaveta Shatrova, Anastasiia Lodochnikova, Irina Streletskaya   +8 more
doaj   +1 more source

Enhanced heterogeneous ice nucleation by special surface geometry

Nature Communications, 2017
Understanding ice nucleation is important for the development of accurate cloud models. Here Biet al. show that sharp wedges can enhance ice nucleation both when the wedge geometry matches the ice lattice and when such matching is absent, in which case ...
Yuanfei Bi, Boxiao Cao, Tianshu Li
doaj   +1 more source

Cryolithostratigraphy of the Middle Pleistocene to Holocene Deposits in the Dmitry Laptev Strait, Northern Yakutia

Frontiers in Earth Science, 2022
The northernmost part of continental Yakutia in the Dmitry Laptev Strait region developed under non-glacial conditions during the Quaternary period. During cooling periods, ice-rich deposits with syngenetic ice wedges, called the Ice Complex, formed here.
Vladimir Tumskoy, Vladimir Tumskoy, Tatiana Kuznetsova   +2 more
doaj   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

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, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Numerical Assessments of Excess Ice Impacts on Permafrost and Greenhouse Gases in a Siberian Tundra Site Under a Warming Climate

Frontiers in Earth Science, 2021
Excess ice that exists in forms such as ice lenses and wedges in permafrost soils is vulnerable to climate warming. Here, we incorporated a simple representation of excess ice in a coupled hydrological and biogeochemical model (CHANGE) to assess how ...
Hotaek Park, Hotaek Park, Alexander N. Fedorov, Pavel Konstantinov, Tetsuya Hiyama   +4 more
doaj   +1 more source

Late-Pleistocene Syngenetic Permafrost in the CRREL Permafrost Tunnel, Fox, Alaska [PDF]

, 2008
contributing authors: Bjella, K.L., Bray, M.T., Collins, C.M., Douglas, T.A., Fortier, D., French, H.M., Kanevskiy, M.Z., Shur, Y.L.Late-Pleistocene syngenetic permafrost exposed in the walls and ceiling of the CRREL permafrost tunnel consists of ice-and
French, H.M., Kanevskiy, M.Z., Shur, Y.L.   +2 more
core  

Formes de cryoturbation fossiles dans le sud-est du Québec [PDF]

, 1965
Fossil cryoturbation forms in Southern Québec are reported for the first time. About sixty ice-wedges were observed in unconsolidated Late Pleistocene and Lower Holocene deposits.
Dionne, Jean-Claude
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Special Issue: Recent advances (2008 – 2015) in the study of ground ice and cryostratigraphy [PDF]

, 2016
Cryostratigraphy involves the description, interpretation and correlation of ground-ice 17 structures (cryostructures) and their relationship to the host deposits.
Abramov, Alexeev, Badu, Bode, Calmels, Calmels, Calmels, Calmels, Cheng, Cnudde, Coulombe, Couture, Douglas, Ducharme, Everdingen, Fortier, Fortier, Fotiev, Fotiev, French, Fritz, Fritz, Froese, Härtel, Iwahana, Jorgenson, Kanevskiy, Kanevskiy, Kanevskiy, Kanevskiy, Kanevskiy, Kanevskiy, Katasonov, Konishchev, Kritsuk, Kuhry, Kuhry, Lacelle, Lacelle, Lacelle, Lacelle, Lacelle, Lacelle, Lachniet, Lapalme, Lauriol, Leibman, Mackay, Mackay, Mackay, Mel'nikov, Meyer, Meyer, Michel, Morse, Murton, Murton, Murton, O'Neill, Opel, Osterkamp, Phillips, Popov, Pumple, Raffi, Reyes, Riddle, Rogov, Schirrmeister, Schirrmeister, Seppälä, Sharkuu, Shpolyanskaya, Shur, Shur, Shur, Shur, Skurikhin, Slagoda, Slagoda, Slagoda, Sliger, Solomatin, Solomatin, Spektor, Spektor, St-Jean, Stephani, Stephani, Strauss, Strauss, Streletskaya, Streletskaya, Tumskoy, Ulrich, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasil'chuk, Vasiliev, Wetterich, Wetterich, Wolfe, Wünnemann, Yoshikawa   +110 more
core   +1 more source

Aggressive prostate cancer is associated with pericyte dysfunction

Molecular Oncology, EarlyView.
Tumor‐produced TGF‐β drives pericyte dysfunction in prostate cancer. This dysfunction is characterized by downregulation of some canonical pericyte markers (i.e., DES, CSPG4, and ACTA2) while maintaining the expression of others (i.e., PDGFRB, NOTCH3, and RGS5).
Anabel Martinez‐Romero, Ane Martinez‐Larrinaga, Joaquim Grego‐Bessa, Saioa Garcia‐Longarte, Hielke van Splunder, Ianire Astobiza, Amaia Ercilla, Laura Bozal‐Basterra, Isabel Mendizabal, Pilar Villacampa, Arkaitz Carracedo, Mariona Graupera   +11 more
wiley   +1 more source