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Aspect ratios of cells cultured on various substrates for 24 and 120 hrs. Cells cultured on aligned fibers were more elongated (larger aspect ratio) than those cultured on TCPS, films, or randomly-oriented fibers. * indicates a statistical significance (p < 0.01) as compared to TCPS, films, and randomly-oriented fibers as determined by an unpaired t test. Between 12 and 26 cells were measured for each condition.
