The Baltic Sea also alternates between redox states: it experienced various periods of low oxygen over the Holocene, but is currently subject to a human - induced period of anoxia, with its bottom waters largely oxic around 1900 CE (Conley et al., 2009). (realclimate.org)
A thermal process for generating H2 from water uses pressure changes to recycle between catalyst redox states. (science.sciencemag.org)
Paramagnetic molecules including oxygen, oxygen radicals and nitric oxide modulate cellular function and injury, altering critical cellular processs such as respiration and redox state with changes in tissue perfusion, energetic state and viability. (grantome.com)