Benzalkonium chloride (BAK) is a common preservative composed of quaternary ammonium compounds with 8–18 carbon alkyl chains, mainly C12, C14, and C16 homologs. Because BAK can adsorb to surfaces, ...

Polyoxometalates (POMs) look like tiny, perfectly ordered mandalas—complex molecular cages made of metal and oxygen atoms.

Beneath the surface of lakes and coastal waters lies a hidden world of sediment that plays a crucial role in the health of aquatic ecosystems. "Benthic fluxes" of nitrogen and phosphorus, such as ...