Results 201 to 210 of about 2,152 (261)
Structural characterization of ribosome recycling and fusidic acid inhibition in Staphylococcus aureus. [PDF]
Nucleic Acids ResGonzález-López A, Selmer M.
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<i>In situ</i> structures of the contractile nanomachine myophage Mu in both its extended and contracted states. [PDF]
J VirolZhou J +7 more
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Ice wedges as archives of winter paleoclimate: A review [PDF]
Permafrost and Periglacial Processes, 2018 AbstractIce wedges are a characteristic feature of northern permafrost landscapes and grow mainly by snowmelt that refreezes in thermal contraction cracks that open in winter. In high latitudes the stable‐isotope composition of precipitation (δ18O and δD) is sensitive to air temperature. Hence, the integrated climate information of winter precipitation
Thomas Laepple +2 more
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Wedge impact with the influence of ice [PDF]
Applied Ocean Research, 2019 Abstract This work presents a canonical study on a wedge entering water near a single piece of ice using computational-fluid-dynamics (CFD) and a Wagner-type theoretical model with corrections for non-linear effects. Calculations for a series of conditions with ice of different sizes and locations relative to the wedge are conducted. The hydrodynamic
Kevin J Maki, Alexander Korobkin
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Life at the Wedge: the Activity and Diversity of Arctic Ice Wedge Microbial Communities
Astrobiology, 2012The discovery of polygonal terrain on Mars underlain by ice heightens interest in the possibility that this water-bearing habitat may be, or may have been, a suitable habitat for extant life. The possibility is supported by the recurring detection of terrestrial microorganisms in subsurface ice environments, such as ice wedges found beneath tundra ...
Wilhelm, Roland C. +4 more
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Modelling of ice‐wedge networks
Permafrost and Periglacial Processes, 2008AbstractThe fundamental and dominant process operating in all ice‐wedge networks is thermal contraction fracturing. This assumption forms the basis of a numerical model combining fracture initiation and propagation in frozen ground and ice, influence of open fractures on stresses, growth of ice wedges and ground deformation above wedges (Plug and ...
L. J. Plug, B. T. Werner
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Ice wedges in south-eastern Finland
Geologiska Föreningen i Stockholm Förhandlingar, 1968Abstract Ice wedge casts, the biggest 1.5 m deep, were found in stratified sand and gravel in sections in the Salpausselka I end-moraine in eastern Finland. Their distribution suggests that they were formed in the end of the Late Weichselian Younger Dryas period and possibly in early Flandrian time, which agrees with the dating of the youngest ice ...
J. J. Donner, V. Lappalainen, R. G. West
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Ice wedges of the Dalton Highway, Alaska
Quarterly Journal of Engineering Geology and Hydrogeology, 2001North America’s largest oilfield was discovered in 1968 at Prudhoe Bay; it contained over ten billion barrels of recoverable oil about 3000 m beneath the Arctic Coastal Plain. Its development changed Alaska’s economy for ever, and included building the oil pipeline from Prudhoe Bay to Valdez.
TONY WALTHAM, PETER FOOKES
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Geografisk Tidsskrift-Danish Journal of Geography, 1976
Svensson, Harald, 1976; Relict ice-wedge polygons revealed on aerial photographs from Kaltenkirchen, northern Germany. Geografisk Tidsskrift 75: 8–12. Kobenhavn, juni 1, 1976. On aerial photographs polygonal patterns are detected in cultivated fields due to vegetational contrasts.
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Svensson, Harald, 1976; Relict ice-wedge polygons revealed on aerial photographs from Kaltenkirchen, northern Germany. Geografisk Tidsskrift 75: 8–12. Kobenhavn, juni 1, 1976. On aerial photographs polygonal patterns are detected in cultivated fields due to vegetational contrasts.
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