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.
There is also one prescription form of zinc oxide, which is a diaper rash ointment (Vusion Â® ointment). Zinc oxide is also used for numerous different non-medicinal purposes. For instance, zinc oxide is used as a white pigment in paint.Zinc oxide is a chemical compound. Its chemical symbol is ZnO. A molecule of zinc oxide consists of one zinc atom bound to one oxygen atom.It is very opaque and can reflect and scatter light, which is why it is useful in a sunblock.n Overview of Zinc Oxide Uses. 1  To protect the skin from irritants (such as in diaper rash creams). 2  To dry the weeping and oozing of minor skin irritations (such as in calamine lotion). 3  To soothe minor skin irritations. 4  To protect the skin from sun damage (when used in sunscreens).