Table 1.

Mean ± standard deviation for the moduli derived from ultrasound measurements using the linear elastic model (LEM) or the poroelastic model (PEM) and from unconfined compression tests (UCC) for each percentage gel and for all the data pooled. Note that in the case of LEM the data center around the bulk modulus for water.

	1%	2%	5%	10%	All%
LEM	2.01 × 109 ± 9.89 × 107	2.13 × 109 ± 7.61 × 107	2.18 × 109 ± 8.78 × 107	2.28 × 109 ± 6.01 × 107	2.15 × 109 ± 1.28 × 108
PEM	2.10 × 107 ± 1.08 × 106	4.28 × 107 ± 1.73 × 106	1.10 × 108 ± 5.12 × 106	2.36 × 108 ± 7.23 × 106
UCC	1.28 × 105 ± 1.61 × 104	2.87 × 105 ± 8.65 × 104	1.17 × 106 ± 1.79 × 105	3.04 × 106 ± 5.26 × 105