Results 161 to 170 of about 36,603 (263)

Effects of warming on plant uptake of post‐fire nitrogen in an arctic heath tundra

open access: yesNew Phytologist, Volume 250, Issue 3, Page 1510-1521, May 2026.
Summary Postfire nitrogen (N) becomes increasingly important with the rising frequency of fires in arctic tundra, and climate warming is expected to accelerate plant recovery following fire. However, how plants differ in utilizing this postfire N and how their postfire N uptake responds to warming remains unknown.
Wenyi Xu, Per Lennart Ambus
wiley   +1 more source

Laboratory Experiments on Savannah and European Boreal Forest Fire Emissions

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 7, 16 April 2026.
Abstract Landscape fire is among the largest sources of aerosols and trace gases globally. However, the emissions are highly variable and strongly affected by the type of biomass and combustion characteristics. We investigated the effect of combustion characteristics on the burning emissions from three biomass types: woody plants and grasses from ...
V. Vakkari   +32 more
wiley   +1 more source

Chiral Heptagon‐Embedded Double [6]Helicenes via Scholl Reaction

open access: yesAngewandte Chemie, Volume 138, Issue 16, 13 April 2026.
One bond makes the difference–two chiral and twisted polycyclic aromatic hydrocarbons (PAHs) show different emission behavior. The more flexible one (top) shows a double emission with one having a large anti‐Stokes shift. The two peaks are assigned to different conformers of one and the same compound.
Dan Wang   +6 more
wiley   +2 more sources

Significant Contribution of Gaseous Organic Nitrogen to Wet and Dry Nitrogen Deposition: Evidence From Year‐Long Monitoring in Coastal Hong Kong

open access: yesJournal of Geophysical Research: Atmospheres, Volume 131, Issue 7, 16 April 2026.
Abstract Atmospheric nitrogen (N) deposition critically affects ecosystem dynamics and carbon cycling, yet organic N (ON) remains under‐monitored relative to inorganic N (IN), limiting constraints on global N budgets and impacts. We conducted year‐long dry and wet deposition measurements of water‐soluble ON (WSON) and IN at a coastal Hong Kong site ...
Xu Yu   +6 more
wiley   +1 more source

Does Aromaticity Drive Metal Cation Binding to Nanographenes? Insights Into Regioselectivity and Cation‐π$$ \pi $$ Bonding

open access: yesJournal of Computational Chemistry, Volume 47, Issue 10, 15 April 2026.
Aromaticity of a ring by itself does not explain the binding energies of alkali and alkaline earth metal cations with nanographenes, but when combined with the Fukui function, it does. ABSTRACT Nanographenes, a subclass of polycyclic aromatic hydrocarbons (PAHs), have attracted significant interest due to their unique electronic properties and broad ...
Omkar Charapale   +3 more
wiley   +1 more source

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