Abstract: In the diagnosis of malignent with ESR technique, we observed that the signal of ESR waving spectrum was obvious for black hair, while ESR signal of white hair was weaker. The results show that human hair consists of 17 species of amino acids, the contents of which in black hair were identical with those in white hair, but the unique difference between black and white hairs was shown to be melanin. The carrier of ESR signal consists of melanin, protein and lipid, among them, melanin is the fundametal carrier of ESR signal.

Key words: ESR technique, Carrier of ESR signal, Amino acid, Black hair, White hair