Results 181 to 190 of about 191,892 (341)

II. Observations on glaciers [PDF]

open access: hybrid
John Tyndall, Thomas Henry Huxley
openalex   +1 more source

Pigment‐Macromolecule Complexes Isolation from Sea Urchin Biomineral Waste for Coloring Materials

open access: yesChemistry–Methods, EarlyView.
A methodology has been developed to extract the colored organic fraction occluded within seashell biomineral waste. Applied to sea urchin skeletons, free polyhydroxylated naphthoquinone (PHNQ) pigments and PHNQ‐macromolecule complexes are isolated. These complexes show superior pH stability in purple hues compared to free PHNQ, which shifts from red to
Claudio Ferreira   +12 more
wiley   +1 more source

Spontaneous Mirror‐Symmetry Breaking Destabilizes Racemates: A Route to Homochirality and Reversed Chemical Selectivity

open access: yesChemPhysChem, EarlyView.
Reaction networks yielding spontaneous mirror‐symmetry breaking (SMSB) are revisited. All include a first‐order enantioselective autocatalysis, which, on its own, is unable to lead to SMSB. The coupling with the so‐called ancillary reactions (racemization, mutual inhibition, etc.) makes the racemic state unstable.
Josep M. Ribó   +2 more
wiley   +1 more source

Balancing Polysulfide Distribution in “Anode‐Free” Lithium–Sulfide Batteries

open access: yesChemSusChem, EarlyView.
“Anode‐free” lithium–sulfide batteries represent a sustainable concept to maximize a battery's specific energy. However, reactions between polysulfide species and the copper negative electrode can prevent their reversible operation. While this necessitates restricting the mobility of polysulfide species, a less effective migration barrier is herein ...
Lennart Wichmann   +11 more
wiley   +1 more source

Towards justice‐oriented climate change and sustainability education: Perspectives from school teachers in England

open access: yesThe Curriculum Journal, EarlyView.
Abstract Education, including school education, is widely understood as fundamental to a just response to global climate and ecological crises. We examined the practices of teachers based in England focused on climate change and sustainability education (CCSE).
Elizabeth A. C. Rushton   +2 more
wiley   +1 more source

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