Aging black hair

Japanese researchers have developed a new approach to Raman spectroscopy that lends itself to studying even highly pigmented hair. This was previously unviable because of interference from melanin in such hair. The work could have implications for understanding how hair changes as we grow older and may even have medical diagnostics applications. Akio Kuzuhara and Nobuki Fujiwara of the Mandom Corporation, in Osaka, and Teruo Hori of Fukui University, have optimized laser power, cross slit width as well as total acquisition time, and used the technique to focus on cross sections of hair containing the least possible melanin granules.