SEARCH Articles Figures Tables BOD (biological oxygen Biological Catalysis of Respiratory Oxygen Reduction Biological Effects of Reduced Oxygen Compounds Biological Strategies Against Oxygen Toxicity Antioxidants, Etc Biological Units Need the Right Amount of Oxygen Biological oxygen demand Biological oxygen demand (BOD Biological oxygen demand biosensors Biological oxygen demand pulp mill effluent Biological oxygen requirement Direct Bioelectrocatalysis Oxygen Reduction for Biological Fuel Cells Oxygen Concentration in Biological Oxygen biological function Oxygen biological processes Oxygen biological role Oxygen cycle biological feedback Oxygen in biologic systems Oxygen reduction biological proteins Reactive oxygen species , nitric oxide chemical biology Reduced oxygen compounds, biological Reduced oxygen compounds, biological effects River biological oxygen demand Singlet oxygen in biological systems The biological oxygen demand Water biological oxygen demand