Fig. 6. (a) Plot of 1/T1versus concentration of different nanoparticles (0, 10, 25, 50, 100, 200, and 400 μg mL–1) in blood and in PBS. (b) Plots of 1/T1versus [Mn2+] for the sgc8-nanosystem with or without GSH at pH 7.4 and pH 5.0. (c) Fluorescence quenching and recovery of different synthesized nanoparticles at pH 5.0 or pH 7.4, with or without GSH. (d) T1-Weighted MRI results of the sgc8-nanosystem at pH 5.0 (top) and pH 7.4 (bottom). Left to right: [Mn2+] = 0.00, 0.14, 0.71, 1.42, 2.14, 2.85 mM.
