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A buffered solution containing hemoglobin was exposed to negative air ions that were generated by corona discharge. In two hours, the optical absorbance at 405 nm decreased to ca., 40% of the value observed prior to the exposure to air ions. After 18 1/2 hours, the absorbance was further decreased to ca. 5% of the original values. The hemoglobin solution exposed to air for this duration did not show any appreciable change in absorbance at 405 nm. Concomitant with the decrease of absorbance at 405 nm, that at 205 nm increased several fold. The molecular weight of the specie(s) which absorbed strongly at 205 nm was ca. 400 daltons. Similar results were obtained when hemoglobin was exposed to ozone (O3) instead of air ions. From these results and our earlier conclusion that O3 is generated from negative air ions in the presence of water, it can be concluded that the destruction of hemoglobin was by O3. |
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