The linguistic root of tzaraath may mean smiting, in comparison with Arabic, in reference to a Talmudical explanation that it serves as a punishment for sin; it is quite possible that tzaraath was a general term for certain types of skin disease, rather than a particular condition, and the Talmud maintains a similar view, arguing that tzaraath referred generally to any disease that produces sores and eruptions on the skin.
Investigations of keratins extracted from wool by reduction hydrolysis and by alkaline hydrolysis showed that their chemical compositions and secondary structures were similar to original wool. The keratin isolates were similar in amino acid, Amides I and II, and secondary structure to each other and to original wool.
Lanolin is derived from the wool after shearing the fleece of sheep and it is interesting to note that extraction of lanolin does not cause any harm to these animals. Normally, 100 pounds of wool or fleece from sheep produce merely two to four pounds of lanolin.he history of lanolin dates back to 8000 years when people first began to use the substance derived from sheep wool. Going by ancient Egyptian history, we find that the primeval Egyptians placed blocks of lanolin on their head.