Philipp Franke

Jan 8, 2025 | nature.com | Philipp Franke |Lin Zhang |Simon Freiberger

AbstractThe oxygen-sensitive molybdenum-dependent nitrogenase of Azotobacter vinelandii is protected from oxidative damage by a reversible ‘switch-off’ mechanism1. It forms a complex with a small ferredoxin, FeSII (ref. 2) or the ‘Shethna protein II’3, which acts as an O2 sensor and associates with the two component proteins of nitrogenase when its [2Fe:2S] cluster becomes oxidized4,5.

Sep 5, 2024 | nature.com | Lu Liu |Anne Lange |Ralf Tillmann |Hendrik Fuchs |Franz Rohrer |Vlassis A. Karydis | +8 more

AbstractOxidized Organic Aerosol (OOA), a major component of fine atmospheric particles, impacts climate and human health. Previous experiments and atmospheric models emphasize the importance of nocturnal OOA formation from NO3· oxidation of biogenic VOCs. This seasonal study extends the understanding by showing that nocturnal oxidation of biomass-burning emissions can account for up to half of total OOA production in fall and winter.