Fig. 6

\({T}_{2}\) distribution in a M7 and b M9 samples with 80% relative humidity (w/w). The x axis is the logarithmic scale of the relaxation time. The Y axis corresponds to the distribution amplitude expressed in normalized relative water content (% w/w). The correspondence between the relaxation time (\({T}_{2}\)) and the meso-porosity is indicated at the top of the figure. The experiments were realized in duplicate. The grey area, between 5 and 15 nm, corresponds to the range of pore size available for enzymes, the replicates are represented in the same color