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- W2063810014 abstract "A. Duration of Effects Groups of mice exposed to high densities of unipolar light air ions for 72 hours exhibited persistent alterations in the functional efficiency of their tracheas. These effects lasted at least 4 weeks, and in the case of animals treated with (+) ions included diminished ciliary activity, pale and contracted tracheal mucosa, and enhanced vulnerability to trauma. Following treatment with (-) ions, animals displayed increased ciliary activity with no other detectable changes. It required at least 60 minutes of exposure to ions to induce such permanent functional changes. B. Minimal Effective Ion Densities The minimal ion densities producing changes in ciliary activity within an arbitrary period of 30 minutes were determined with extirpated tracheal strips from rabbits and guinea pigs. The threshold value for (-) ions was approximately 2.5 x 10(3) ions/cm.(2)/sec. and that for (+) ions was in the range between 1 x 10(4) and 2.5 x 10(5) ions/cm.(2)/sec.The minimal ion densities producing changes in ciliary activity within an arbitrary period of 30 minutes were determined with extirpated tracheal strips from rabbits and guinea pigs. The threshold value for (-) ions was approximately 2.5 x 10(3) ions/cm.(2)/sec. and that for (+) ions was in the range between 1 x 10(4) and 2.5 x 10(5) ions/cm.(2)/sec. The evidence indicates that ion-induced functional changes in the ciliated epithelium of the pulmonary tree are the results of direct contact of ions with surface cells and do not involve participation of the central nervous system or circulation. So far as ciliary activity is concerned, the number of ions required to produce a change in rate is very small." @default.
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- W2063810014 date "1959-05-20" @default.
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- W2063810014 title "PARAMETERS OF GASEOUS ION EFFECTS ON THE MAMMALIAN TRACHEA" @default.
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- W2063810014 doi "https://doi.org/10.1085/jgp.42.5.959" @default.
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