Figure 2: Determination of bulk modulus of PAA microbeads (5/0.225). | Nature Communications

Figure 2: Determination of bulk modulus of PAA microbeads (5/0.225).

From: Cell-like pressure sensors reveal increase of mechanical stress towards the core of multicellular spheroids under compression

Figure 2

Stress–strain relation for PAA beads prepared by the ratio of 5/0.225 acrylamide/bisacrylamide. The linear fit has been determined for the first three points. We used and fitted polynomial Rivlin–Mooney model to determine the strain in the non-linear region. Results are represented by mean±s.d. Inset: fluorescent images of a bead at the initial state P=0 kPa and after application of a mechano-osmotic stress P=5 kPa. Scale bar, 20 μm.

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