Fig. 7.

FTIR spectra of filter paper samples with D1 ORL UVA stem cells that were incubated in regular growth media or osteogenic media for 14 and 21 days with vibration or under static conditions. a Spectra of samples incubated in growth medium and the non-cell seeded empty paper, b spectra of samples incubated in osteogenic induction medium and empty paper c spectra of samples in growth condition after the spectrum of empty paper was subtracted from each and d spectra of samples in osteogenic condition after the spectrum of empty paper was subtracted from each. GC growth control, GV growth vibration, OC osteogenic control, OV osteogenic vibration, EP empty paper, d14: 14th day of cell culture, d21: 21st day of cell culture