title: Effect of oxygen on freezing damage. II. Physical-chemical effects.
mesh_terms: D001419:Bacteria; D002462:Cell Membrane; D002499:Centrifugation, Density Gradient; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D004269:DNA, Bacterial; D004578:Electron Spin Resonance Spectroscopy; D004926:Escherichia coli; D005609:Free Radicals; D005615:Freezing / Q000009:adverse effects*; D010100:Oxygen / Q000633:toxicity*; D013053:Spectrophotometry
chemical_list: D004269:DNA, Bacterial; D005609:Free Radicals; D010100:Oxygen