Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air purifiers; Air sterilisers; Air sterilising apparatus; Apparatus and instruments for use in the purification, separation and sterilization of liquids and gases used in the biotechnology, pharmaceutical, medical, biopharmaceutical and food and beverage industries; Automatically operated electric lighting apparatus for use with animal feeders; Cleansing/sanitizing system comprising a containment enclosure specially adapted for containing an atomized cleansing/sanitizing spray mechanism for use in the cleansing/sanitizing of objects including articles of manufacture, natural products, foods and pharmaceuticals; Electrolytic water generators for electrically decomposing tap water to generate electrolytic water and for removing chlorine odor from tap water; Germicidal lamps for purifying air; Oxygen generator based on thermal decomposition of oxygen rich salts; Portable electric household appliance used to kill bacteria and viruses on food; Sanitizing apparatus for linens using ultraviolet light, ozone sterilization and low pressure techniques; Sanitizing apparatus using ultraviolet light for sanitizing linens, surfaces of objects not for medical purposes; Water ionizers; Water purification and filtration apparatus