Results 31 to 40 of about 591,166 (254)
, 2009 During recent fieldwork in Svalbard, a well preserved subfossil left mandible of a polar bear (Ursus maritimus Phipps, 1774) was discovered. A 14C age determination shows that it is older than 45 Ky (kilo-years), and an age determination with infrared ...
Wiig, Øystein, Ingólfsson, Ólafur
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Polar bear predation on ringed seals in the fast-ice of Hornsund, Svalbard
, 1986 Polar bear hunting success on ringed seals in subnivean lairs and basking on the fast ice, was studied in Hornsund, Svalbard. A few bears were observed while actually hunting, but in most cases bear tracks were followed by snowmobile to determine the ...
Gjertz, Ian, Lydersen, Christian
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Toward a non‐invasive inuit polar bear survey: Genetic data from polar bear hair snags
Wildlife Society Bulletin, 2013 We explore the feasibility of collecting microsatellite genotypes of non‐invasively collected hair from free‐ranging polar bears (Ursus maritimus) in M'Clintock Channel, Nunavut, Canada.
Peter Van Coeverden De Groot +7 more
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Ikona, świadek, ofiara. Niedźwiedź polarny jako figura wizualna dyskursu zmiany klimatu
Zagadnienia Rodzajów Literackich, 2021 The article focuses on the media practice of using visual representations of polar bears to illustrate information about climate change. It starts with a short description about the iconic status that climate discourse attributes to these type of images.
Michał Piasecki
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Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Polar bear hunt strategies evaluated by a Leslie matrix population model
, 2010 An APL program for a Leslie matrix population projection is developed and applied to analysis of a Canadian polar bear population. Hunting specified with respect to sex ratio within a total quota may be included in the projections.
Øritsland, Nils Are, Schweinsburg, Ray
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FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Projected polar bear sea ice habitat in the Canadian Arctic Archipelago. [PDF]
PLoS ONE, 2014 Sea ice across the Arctic is declining and altering physical characteristics of marine ecosystems. Polar bears (Ursus maritimus) have been identified as vulnerable to changes in sea ice conditions.
Stephen G Hamilton +5 more
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Membrane composition and thermodynamic identity as boundaries of life for synthetic cell research
FEBS Letters, EarlyView.What makes a cell a cell? The boundary of a living cell is not just a wall. Read as a Markov blanket, the membrane separates internal from external states, generating identity and non‐equilibrium order. Can this identity be rebuilt from scratch in a synthetic cell?
Caterina Presutti, Bert Poolman
wiley +1 more source
Arctic ScienceInclusion of Indigenous knowledge in polar bear (nanuq [Inuktut]; Ursus maritimus) conservation and management decisions remains an enduring challenge. The Nunavut Wildlife Management Board (NWMB) held a series of public hearings on polar bear management
D. Reiter +4 more
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