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The aim of the present study was to compare one-step method to EDC/NHS crosslinking (EDC/NHS group) and one-step simultaneous method to EDC/NHS crosslinking and heparin immobilization (EDC/NHS- Heparin group) in improving physiochemical and biological properties of native collagen sponge (Control group). Modified collagen sponge overcome the disadvantages of native collagen sponge. IR spectra suggest...
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