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UV-vis transmission spectra and X-ray diffraction of fish gelatin-based bio-nanocomposite films. (a) UV-vis spectra at the wavelength range of 200 to 1,100 nm of the gelatin films with ZnO NRs at various concentrations. (b) XRD patterns for the gelatin nanocomposite films with various concentrations of ZnO NRs.
