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Effect of HU molecular weight in the modification mixture and for the texturing of HU films. Following MWs of HU in the film and in the modification mixtures were used: (A) 1000 kDa (film): 470 kDa (mixture type A); (B) 470 kDa (film): 470 kDa (mixture type A); (C) 470 kDa (film): 470 kDa plus 1000 kDa (mixture type B). The micrographs were acquired with an optical microscope.
