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The aim of the present work was to investigate the moisture sensitivity of films of soy protein isolate (SPI) blended with poly(vinyl alcohol) (PVA) and plasticized with glycerol. Water vapor permeability (WVP) and moisture sorption were measured based on the PVA and glycerol content of the films. WVP values of SPI/PVA films with and without glycerol were in the range 8.25–10.9gmm (m 2 hkPa)...
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