basic dyes are more effective for bacterial staining than acidic dyes because basic dyes have a positive charged chromogen. Bacterial nucleic acids and certain cell wall compo â¦ nents carry a negative charge that strongly binds to the cationic chromogen.
Zinc oxide can be used in ointments, creams, and lotions to protect against sunburn and other damage to the skin caused by ultraviolet light (see sunscreen). It is the broadest spectrum UVA and UVB reflector that is approved for use as a sunscreen by the FDA, and is completely photostable.he zinc oxide is thought to have been produced by heating zinc ore in a shaft furnace. This liberated metallic zinc as a vapor, which then ascended the flue and condensed as the oxide. This process was described by Dioscorides in the 1st century AD.
Zinc is a trace mineral that acts as a cofactor in the production of hemoglobin, in the superoxide dismutase antioxidant enzyme system, in the metabolism of carbohydrates, fats, and proteins, and in activating vitamin A in the retina.opper is a trace mineral that functions as a cofactor in the metabolic pathways that produce energy, in the production of collagen and elastin, and as part of the superoxide dismutase antioxidant enzyme system.