title: Photoproduction of hydrogen, photofixation of nitrogen and a unified concept of photosynthesis.
mesh_terms: D002844:Chromatium; D006859:Hydrogen; D009584:Nitrogen; D010788:Photosynthesis
chemical_list: D006859:Hydrogen; D009584:Nitrogen
keywords: CHROMATIUM/extracts; HYDROGEN; NITROGEN; PHOTOSYNTHESIS