title: [Effects of perming, combing and stretching on hair keratins].
abstract: OBJECTIVE
  Research of the hair damage due to perming, combing and stretching can be of important value for forensic hair individual identification.
  
  
  METHODS
  The normal human hairs were treated with perming combing and stretching, and the keratins of the damage hair were analysed by using SDS-PAGGE and laser densimeter.
  
  
  RESULTS
  Perming, combing and stretching brought about hair damage; The keratins of the damage hair were obviously reduced at the rang of molecular weight of 67,000-43,000 dalton.
  
  
  CONCLUSIONS
  The loss of the damage hair keratins were increased with the degree of the hair damage.
authors.affiliation: Institute of Forensic Sciences, Ministry of Justice, P. R. C Shanghai 200063. phyan@online.sh.cn
authors.forename: P H
authors.initials: PH
authors.lastname: Yan
authors.forename: T Z
authors.initials: TZ
authors.lastname: Que
authors.forename: Z M
authors.initials: ZM
authors.lastname: Zhao
mesh_terms: D000328:Adult; D005260:Female; D005554:Forensic Medicine; D006197:Hair / Q000737:chemistry* / Q000503:physiopathology; D006358:Hot Temperature / Q000009:adverse effects; D006801:Humans; D007633:Keratins / Q000032:analysis / Q000378:metabolism*
chemical_list: D007633:Keratins