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.
What are keratin treatments? Keratin treatments are a temporary but long lasting hair straightening and conditioning process, typically performed in a salon. Keratin treatments take about 90 minutes to 2 hours to complete in a salon, depending on the length of the hair. The effects usually last around 8 to 10 weeks. The keratin treatment gradually leaves the hair, and there is no sharp difference between treated areas and new growth. Subsequent keratin treatments are done just the same way as the first treatment. After most keratin treatments, the hair should not be washed for two to three days. Clients are advised to use sulfate free shampoos after treatment, which will help the effects of the treatment last longer.