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a) Young's modulus, b) ultimate tensile stress and c) ultimate tensile strain of polymer films with and without linear polyethyleneimine (LPEI) incorporation and with and without exposure to NO gas. Asterisks (*) indicate that the value is statistically discernable from that of the 0% polydimethylsiloxane (PDMS) sample in the same treatment group. Additional significant differences are indicated by the tie bars.
