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These previously uncharacterized acid sulfuric anhydride products are almost certainly key contributors to atmospheric new particle formation and a way to efficiently incorporate carboxylic acids into atmospheric nanoparticles.

They also tweaked a carboxylic acid group at the bottom of the molecule, speeding up how quickly the antifungal removed ergosterols.

As has been found in previous studies, more mosquitoes seemed to prefer people whose scent contained a blend of carboxylic acids, the oily secretions that hydrate and protect our skin.

The study didn’t answer why some people have more carboxylic acids on their skin than others.

Humans release carboxylic acids at much higher levels than most animals, De Obaldia adds, though the amount varies from person to person.