Fig. 7From: Regeneration of TiO2 Nanotube Arrays after Long-Term Cell and Tissue Culture for Multiple Use – an Environmental Scanning Electron Microscopy (ESEM) Survey of Adult Pig Retina and beyondDistinct cleaning steps of tissue residues using O2-plasma treatment for 25 min (a), 85 min (b) and 145 min (c) respectively. Scale bars correspond to 10 μmBack to article page