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A representative example of the effect of fluid viscosity on microbubble oscillation characteristics at 1 MPa. Six selected still frames from an ultra-high speed recording at approximately 10.5 Mfps for (top) a 4.3 μm diameter microbubble in 1 cP liquid and (bottom) a 4.8 μm diameter microbubble in 4 cP liquid. Each panel is 18.70 × 17.85 μm.
