Here's a reference for that I think is easy to understand and worth reading:http://www.vet.utk.edu/vhms/pdf/Free...xygenSpecies.p

Here's some of the article:
3
II. Reactive Oxygen Species
A. Individual species
1. Superoxide anion
a. • O2
-
2. Hydroxyl radical
a. • OH
3. Hydrogen peroxide
a. H2O2
4. Nitric oxide
a. • NO
5. Hypochlorite ion
a. OCl-
6. Ozone
a. O3
7. Thiyl radicals
a. RS •
8. Carbon centered radicals
a. • O2CCl3
III. HBOT and ROS’s
A. ROS affects depend on;
1. balance with anti-oxidant production
2. physical condition of the patient
3. concentration, frequency and duration of hyperbaric
oxygen exposure.
B. Exposure limits
1. 2.5 ATA and less �� no significant increase in ROS
production.
2. Frequency and duration of treatment that might
significantly increase ROS production in horses is not
known.
a. The limits of accumulative or acute exposure to
hyperbaric oxygen have not be established.
C. HBOT and benefits of ROS production
1. Enhancement of antimicrobial effects of cellular immunity
especially in hypoxic environments.
2. Some evidence exists that indicating that HBOT may
actually decrease lipid peroxidation in cell membranes.