Fig. 3From: Enhancing mesenchymal stem cells cultivated on microcarriers in spinner flasks via impeller design optimization for aggregated suspensionsA Cell viability staining with Calcein–AM/PI on day 9 under different rotational speeds. Scale bar: 500 μm. B Dynamic curves of cell density and aggregate size. C Flow cytometry analysis of cell surface markers CD73, CD90, and CD105 at different rotational speeds. The control group consisted of pre-expansion cellsBack to article page