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The panel on the left shows comparison of oxidation yield after 1-d incubation in dark of glutathione in freeze–pump–thaw degassed water with and without particles (mesoporous silica particles, 500-nm nonporous silica, and 3-µm nonporous silica), after removal of dissolved gasses and correction of ionization efficiency ratios for reduced and oxidized glutathione. The right panel shows the dose dependence while no light response after 1-d incubation in freeze–pump–thaw degassed water.
