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Fig. 4. Linear regression analysis of surface tension versus volume for CHO-Ncad and CHO-A5 aggregates. Aggregates of CHO-Ncad ({Delta}) ranging in volume from 0.1 to 0.3mm3 were subjected to TST. Linear regression analysis of the data generated a correlation coefficient (r2) of 0.099, indicating that no statistically significant correlation exists between {sigma} and volume. A similar analysis of CHO-A5 (O) aggregates produced an r2 value of 0.402, suggesting a possible weak relationship between {sigma} and volume.