Fig 1.
Agar samples.
Fig 2.
Schematic of SAM system.
Fig 3.
Indentation tester.
Fig 4.
Schematic of indentation tester system.
Fig 5.
Representative acoustic impedance color-coded maps for agar samples with concentrations.
(A) 5%, (B) 10%, (C) 15%, and (D) 20%. Bars: 1 mm.
Fig 6.
Acoustic impedance of each agar sample plotted against its concentration.
Table 1.
Acoustic impedance of the agar samples (mean ± SD) [MNs/]
Fig 7.
Representative plots of force against indentation depth for agar concentrations.
(A) 5%, (B) 10%, (C) 15% and (D) 20%. Lines were obtained by fitting () to the data.
Fig 8.
Young’s modulus for each agar sample plotted against its concentration.
Table 2.
Young’s modulus of the agar samples (mean ± SD) [MPa]
Fig 9.
Young’s modulus plotted against acoustic impedance, both averaged over each sample.
Blue line: obtained by fitting (Eq 8), . Red line: obtained by fitting (Eq 9),
.