however, absolute comparison
among studies is difficult because of the different plasticizer compositions
and testing methods used. The incorporation of commercial
b-carotene (BeC film) or carotenoid extracts from shrimp
(S_E film) or tomato (T_E film) waste caused a significant reduction
of the WVP of the films (p 0.05), which was especially evident in
the S_E film; however, it is worth noting that the WVP of all the
films was of the same order of magnitude. The lower WVP is
attributed to the increase in the hydrophobicity of the matrix
derived from the addition of hydrophobic molecules. This explanation
would be in agreement with the analysis of the fat content of
the films, which was 4.8 ± 0.1, 5.1 ± 0.2, 7.2 ± 0.2, and 11.6 ± 0.1 g/
100 g of film for C, BeC, T_E, and S_E films, respectively.