Fig. 3
From: In vivo imaging of free radicals produced by multivitamin-mineral supplements
CPH is oxidized to CP● by inorganic RVM. CPH (200 μM) was included in an aqueous suspension of RVM (pH 7.2) and the formation of CP● (aN = 16.2 G [25]) was observed by EPR. The intensity of the spectrum of CP● increased with time demonstrating ongoing one-electron oxidation of CPH in the aqueous suspension of RVM. In the absence of RVM only a very low background spectrum of CP● ([CP●] < 0.1 μM) was observed that did not change significantly in this same time-frame. Inset: spectra collected over time varied only in intensity with no observable changes in lineshape consistent with the one-electron oxidation of CPH to CP●, with no other significant chemistry