title: Nitrogen fixation by unicellular blue-green algae.
mesh_terms: D000391:Air Microbiology; D000458:Cyanobacteria / Q000254:growth & development / Q000378:metabolism*; D008853:Microscopy; D008854:Microscopy, Electron; D009566:Nitrates / Q000378:metabolism; D009586:Nitrogen Fixation
chemical_list: D009566:Nitrates