title: Symposium on oxygen. Introduction: oxygen and life.
mesh_terms: D001272:Atmosphere; D005075:Biological Evolution; D006801:Humans; D010084:Oxidation-Reduction; D010100:Oxygen / Q000009:adverse effects / Q000627:therapeutic use / Q000633:toxicity; D010788:Photosynthesis
chemical_list: D010100:Oxygen