Figure 3. Scanning Electron Microscopy of stainless steel wires. a: uncontaminated, b-e: incubated with 10% hamster brain homogenate infected with the 263K prion strain and treated with 224 μg mL⁻¹ Fe³⁺, 500 μg mL⁻¹ h⁻¹ H₂O₂, pH = 3.5, UV-A for 0, 240, 360, and 480 min respectively. White bar: 200μm, black bar: 20 μm. Panels to the right (A2-E2) are close ups of respective areas of the left column (A1-E1).