Elastic modulus that varied between 323.3 MPa and 2308.7 MPa
(Fig. 2b) were in similar range that the corresponding to the other polysaccharide
films containing probiotics (Kanmani & Lim, 2013;
Sánchez-González, Quintero Saavedra, & Chiralt, 2013, 2014). In
unplasticized kefiran films the individual inclusion of lactobacilli or
yeast leads to an increase in this parameter, while the presence simultaneously
of both microorganisms did not modify it. In glycerol plasticized
films the inclusion of both, lactobacilli and yeast, did not change the
elastic modulus value. A similar trend was observed by SánchezGonzález
et al. (2014) for the incorporation of Lactobacillus acidophilus
in glycerol plasticized sodium caseinate films