Radiation does not penetrate glass, dirt films, water and ut 1. Ultraviolet radiation: 260nm is quite lethal bu other substances uv lamps: the ceilings of rooms biological safety cabinets attention! uv lamp must be off 2. lonizing radiation: not always as effective against viruses Co60: cold sterilization for antibiotics hormones suturesRadiation • 1. Ultraviolet radiation: 260nm is quite lethal but does not penetrate glass, dirt films, water and other substances. uv lamps: the ceilings of rooms biological safety cabinets attention! uv lamp must be off • 2 . Ionizing radiation: not always as effective against viruses. Co60: cold sterilization for antibiotics, hormones, sutures