Abstract
The reactions of NO·- with O2·- and with HO2·- were studied using the pulse radiolysis technique under pseudo first order conditions where ([O2·-]o + [HO2·-]o) > [NO·]o at pH 3.3-10.0. The rate constant of the reaction of NO' with O2· was determined both by monitoring the decay of O2·- at 250 nm and the formation of ONOO at 302 nm to be (4.3 ± 0.5) × 109M-1s-1, independent of ionic strength and pH in the range of 6.1-10.0. The rate constant of the reaction of NO· with HO2·- was determined by following the decay of HO2· at 250 nm to be (3.2 ± 0.3) × 109 M-1s-1 at pH 3.3.
Original language | English |
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Pages (from-to) | 505-510 |
Number of pages | 6 |
Journal | Free Radical Biology and Medicine |
Volume | 19 |
Issue number | 4 |
DOIs | |
State | Published - Oct 1995 |
Keywords
- Free radicals
- Nitric oxide
- Peroxynitrite
- Pulse radiolysis
- Superoxide