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Results of the dynamic compression test. With the frequency increasing, the storage modulus increased significantly (P < 0.01) and both the loss modulus and tanδ decreased significantly (P < 0.01). (a) Storage modulus of control group was significantly higher than the other two groups (P < 0.01). (b) Loss modulus of control group was significantly higher than the other two groups (P < 0.01). (c) tanδ of control group was significantly higher than the other two groups (P < 0.01).
