Results 131 to 140 of about 22,151 (252)

Receptor‐Free Identification of Toxic Gases Enabled by Hygroscopic Aqueous Salt Films

Advanced Functional Materials, EarlyView.
Water as a gas sensor coating sounds impossible—until it stops evaporating. Here, hygroscopic salt solutions (LiCl, LiBr, H3PO4) form non‐drying aqueous films on CNT chemiresistors under ambient air. Gases partition into these liquid layers, sometimes transforming into water, and generate salt‐specific resistance fingerprints across a four‐channel ...
Seongwoo Lee, Yun‐Tae Kim, Hwarang Choi, Sanghwan Park, Seongyeop Lim, Chang Young Lee   +5 more
wiley   +1 more source

Polar bears and expanding sea ice in the Mid Holocene Aleutian Islands, Alaska

Scientific Reports
The archaeological record offers the opportunity to infer the effects of regional climatic shifts on species distributions and human-animal interactions.
Lillian Draper Parker, Catherine F. West, Kaylee Hope Tatum, Michael Etnier, Brandi Bethke, Katherine Reedy, Nikkita Shellikoff, Courtney A. Hofman   +7 more
doaj   +1 more source

Swelling‐Programmed Topographical Guidance for Dynamic Spheroid Self‐Assembly via a Mechanochemical Hydrogel Niche

Advanced Functional Materials, EarlyView.
A swelling‐programmed micropatterned hydrogel guides adherent cells through a controlled transition from cell–matrix anchoring to cadherin‐mediated cell–cell compaction, enabling rapid assembly of high‐viability spheroids with defined size and morphology.
Han Gyeol Nam, Seon Yeong Chae, Young Woo Kwon, Hye Jin Heo, Hye Rin Lee, Ji Hyeok Lee, Dong‐Wook Han, Yun Hak Kim, Suck Won Hong   +8 more
wiley   +1 more source

Diet-driven mercury contamination is associated with polar bear gut microbiota. [PDF]

Sci Rep, 2021
Watson SE, McKinney MA, Pindo M, Bull MJ, Atwood TC, Hauffe HC, Perkins SE.   +6 more
europepmc   +1 more source

Polar bear skin

, 2017
This polar bear skin is an artifact in the Alberta Aviation Museum permanent exhibit of the 418 Squadron.
Campbell, Sandy
core   +1 more source

Tuning Separator Chemistry: Improving Zn Anode Compatibility via Functionalized Chitin Nanofibers

Advanced Functional Materials, EarlyView.
Nanochitin derived from waste shrimp shells is used to fabricate separators for aqueous zinc batteries. By tuning the density of amine and carboxylic surface groups, water mobility at the separator interface is controlled, promoting uniform zinc deposition, suppressing dendrite growth, and enabling exceptional cycling stability exceeding 2000 h ...
Ibrahim Al Kathemi, Vishnu Arumughan, Mohamed Zbiri, Marcel Kröger, Ira Smal, Eero Kontturi, Roza Bouchal   +6 more
wiley   +1 more source

An on-ice aerial survey of the Kane Basin polar bear (Ursus maritimus) subpopulation. [PDF]

Polar Biol, 2022
Wiig Ø, Atkinson SN, Born EW, Stapleton S, Arnold T, Dyck M, Laidre KL, Lunn NJ, Regehr EV.   +8 more
europepmc   +1 more source

Resolving the Cu(bdc) Conundrum: Identifying Non‐Porous Packing of Prototypical Coordination‐Network Thin Films Combining Advanced Diffraction Techniques and Computational Modelling

Advanced Functional Materials, EarlyView.
Solution‐processed Cu(bdc) forms prototypical MOF thin films for which a multitude of not fully satisfactory structural models have been suggested. Combining rotating grazing‐incidence diffraction and X‐ray reflectivity on two complementary samples with density‐functional theory, we first discard the previously suggested models and then identify a non ...
Narges Taghizade, Mario Fratschko, Robbin Steentjes, Mercedes Linares‐Moreau, Paolo Falcaro, Christof Wöll, Roland Resel, Egbert Zojer   +7 more
wiley   +1 more source

Distinct gut microbiomes in two polar bear subpopulations inhabiting different sea ice ecoregions. [PDF]

Sci Rep, 2022
Franz M, Whyte L, Atwood TC, Laidre KL, Roy D, Watson SE, Góngora E, McKinney MA.   +7 more
europepmc   +1 more source

The polar bear

, 2016
Learn about polar bear bodies, habits, and habitatsPolar bears are enormous, wild, beautiful creatures. Inhabitants of the Arctic, they live in an alien world of freezing temperatures, snow, and ice.
Desmond, Jenni
core