Laser magnetic resonance, resonance fluorescence, resonance absorption studies of the reaction kinetics of atomic oxygen + hydroxyl .fwdarw. atomic hydrogen + molecular oxygen, atomic oxygen + perhydroxyl .fwdarw. hydroxyl + molecular oxygen, atomic nitrogen + hydroxyl .fwdarw. atomic hydrogen + nitric oxide, atomic nitrogen + perhydroxyl .fwdarw. products at 300 K between 1 and 5 torr