Comparing horizontal vs vertical bead beating, ... each for six different replicates (Fig. 2c). These differences were statistically significant (p < 0.05), ... Two different bead mills were compared, a manual vortex mixer (VWR, Radnor, PA) (vertical bead beating) and a hands-free vortex genie-2 (MO BIO Laboratories, Carlsbad, CA), …