FIG. 5.

(a) The ratio between Young's modulus (E) from compression measurements and storage modulus (G′) from oscillatory shear experiments was substantially constant throughout all the 6.25 and 12.5 mg/ml fibrin formulations; please note that the large error bars stem predominantly from the relative error of the G′ measurements above all for the softest materials. It is, however, possible to see that in most cases E was 3.5–4 times larger (shaded area) than G′. (b) E and G′ data of the formulations in (a) can be correlated, in order to estimate a value for the Poisson ratio (ν) of these materials.