[Studies on the influence of positive or negative small ions on the catechol amine content in the brain of the mouse following shorttime or prolonged exposure (author's transl)].
Mice were exposed to an atmosphere enriched with positive or negative small ions (density: 52000 each of positive or negative charge carriers/cm3 air); after the exposure times of 5, 30 min and 1, 3, 10 d, we determined the norepinephrine content of the brain.


RESULTS
In the case of negative ionization of the air, no difference to untreated controls could be determined at any of the above exposure times. Positive ions, however, cause an elevated norepinephrine level after an exposure time of up to one day; after the exposure times of 3 to 10 d, a drop in the norepinephrine level could be observed in comparison to the control data.


CONCLUSIONS
Negative ions have a neutral effect under the given bioclimatologic conditions. However, positive charge carriers cause stress after shorttime application in excess. After longer exposure, a state of exhaustion can be observed in the form of a lowered norepinephrine level.
D000818:Animals; D000838:Anions; D001921:Brain / Q000378:metabolism*; D002412:Cations; D007700:Kinetics; D051379:Mice; D009638:Norepinephrine / Q000378:metabolism*; D013997:Time Factors; D015040:Zirconium
D000838:Anions; D002412:Cations; D015040:Zirconium; D009638:Norepinephrine
Untersuchungen über den Einfluss von positiven oder negativen Kleinionen auf den Katecholamingehalt im Gehirn der Maus nach Kurzzeiteinwirkung oder längerfristiger Exponierung.