Préfecture (capital): Périgueux[?].
Sous-préfectures: Bergerac[?], Nontron[?], Sarlat la Canéda[?].
See also: List of the communes of the Dordogne département
... the still-excited electrons are transferred to a photosystem I complex, which boosts their energy level to a higher level using a second solar photon. The highly excited ...