Oxygen Permeability in Concrete (IMAGE) Ehime University Caption This is a schematic image of ingress of oxygen into the pore structure and reduction of dissolved oxygen by aerobic microorganisms in pore solution. Credit Ehime University Usage Restrictions Please get copyright permission License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.