title: A preliminary study on influence of negative air ions generated from pajamas on core body temperature and salivary IgA during night sleep.
abstract: OBJECTIVE
  This study was conducted to examine whether negative air ions generated from pajamas would influence the rectal temperature and the immune system during night sleep.
  
  
  METHODS
  Nine females (aged 18-23 years) served as participants. They slept during the night in their homes, wearing the pajamas with generation of negative air ions (1260 ions/cm3) and with normal standard (520 ions/cm3). The sequence of wearing the pajamas was: first, standard pajamas; second, pajamas with negative air ions; and third, standard pajamas again, each being worn for three consecutive days.
  
  
  RESULTS
  Rectal temperature in the pajamas with negative air ions tended to fall more significantly during the night-time (p = 0.068). Salivary IgA tended to be higher on waking when wearing pajamas with negative air ions (p = 0.094) and its effect continued even after standard pajamas were worn again during last three days.
  
  
  CONCLUSIONS
  These results suggest that the rectal temperature could possibly be more reduced and the elevation of salivary IgA more marked if the pajamas with negative air ions are worn during nocturnal sleep.
authors.affiliation: Nara Women's University, Nara, Japan. tomoko_wakamura@cnas-hyogo.ac.jp
authors.forename: Tomoko
authors.initials: T
authors.lastname: Wakamura
authors.forename: Maki
authors.initials: M
authors.lastname: Sato
authors.forename: Akihiro
authors.initials: A
authors.lastname: Sato
authors.forename: Takahiro
authors.initials: T
authors.lastname: Dohi
authors.forename: Kazuto
authors.initials: K
authors.lastname: Ozaki
authors.forename: Norio
authors.initials: N
authors.lastname: Asou
authors.forename: Shigeru
authors.initials: S
authors.lastname: Hagata
authors.forename: Hiromi
authors.initials: H
authors.lastname: Tokura
mesh_terms: D000293:Adolescent; D000328:Adult; D000390:Air Ionization; D000704:Analysis of Variance; D001831:Body Temperature; D003020:Clothing; D005260:Female; D006801:Humans; D007070:Immunoglobulin A / Q000378:metabolism*; D012890:Sleep / Q000502:physiology*
chemical_list: D007070:Immunoglobulin A