It also reused and disinfected rinse water. The contaminated equipments and machines can be disinfected by spraying bactericidal compound. The raw water is disinfected with sodium hypochlorite. Swimming pool water is usually disinfected by chlorination, bromination, ozonation or UV radiation. Warm-water bidets may harbor dangerous microbes if not properly disinfected. It is then disinfected with chlorine and stored for later use. This involves having dentures properly fitted and disinfected. Swimming pools can be disinfected with a variety of chlorine-releasing compounds. In some lazarets, postal items were also disinfected, usually by fumigation. Silicone is a particularly good material, as it can be disinfected in boiling water. Hands and instruments may be disinfected with these pads while treating wounds. Bulbs and seeds can be disinfected by hot-water treatments. Water with organic matter can be disinfected with ozone-initiated radical reactions. For professional cultivation it is recommended to use disinfected seeds to prevent onset diseases. The fragments are disinfected and placed on nutrient media.