The syringe nitroxide free radical--Part II.
Some plastic syringes introduce a nitroxide free radical into the fluids they contain. The EPR spectrum shows a triplet with aN = 17.0 +/- 0.1 G in plasma. We report here that this nitroxide/hydroxylamine couple serves as an antioxidant system, whose redox potential appears to be between that of vitamin C and vitamin E. This adventitious antioxidant can alter the course of free radical processes.
Buettner
G R
GR
ESR Center, College of Medicine, University of Iowa, Iowa City 52242.
Sharma
M K
MK
D001205:Ascorbic Acid / Q000737:chemistry; D005609:Free Radicals; D009589:Nitrogen Oxides / Q000737:chemistry*; D010969:Plastics / Q000737:chemistry*; D013594:Syringes
D005609:Free Radicals; D009589:Nitrogen Oxides; D010969:Plastics; D001205:Ascorbic Acid