On the Contribution of Lipid to the Properties of Yuba-film

Abstract

In the previous paper the authors reported the functional properties of Yuba-film made from soybean 11S and 7S globulins. The present work aims at elucidation of the effects of lipid to the properties of Yuba-film prepared from the respective proteins.
The protein solutions homogenized with soybean oil were used to prepare the Yuba-film, and physical properties of the formed films investigated, and extractability of lipid by solvents from the films was also examined to reveal the lipid distribution in the films.
The films containing lipid were generally stronger and more extensible than the protein film, and the 11S film was more significant in these properties in comparison with the 7S film. The lipid contained in the 7S film was largely extracted with ether and chloroform-methanol mixture, but only partial lipid was extracted from the 11S film. From the result it might be thought that 11S was more lipophile than 7S.