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Fig. 8. Comparison of B. canaliculatum WECB equilibrated in varying
concentrations of formic acid (FA) for 1 h prior to testing compared to a
native specimen. The tenth cycle of each trial is presented. Higher
concentrations of acid at incubation times of 1 h result in a transitional
disappearance of the Hookean region of the stress-strain curve. At 88% FA, a
30 min incubation possessed a present, but greatly reduced Hookean region
compared to the 1 h incubation pictured above.