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Cells grown on polyimide (A) and on standard cell culture plastic (B). The light micrograph shows cells as irregular structures on the polyimide films. The horizontal bar shows a boundary between two polyimide pieces (Magnification 6×, Discovery V.8; Carl Zeiss GmbH, Oberkochen, Germany). For normal cell culture plastic the cells are depicted by phase-contrast (Axiovert 40C, Carl Zeiss GmbH, Oberkochen, Germany).
