Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29619
Title: Changes in in vitro digestibility and available lysine of soy protein isolate after formation of film
Authors: Ou, S
Kwok, KC
Kang, Y
Keywords: Available lysine
Digestibility
Edible film
SPI
Issue Date: 2004
Source: Journal of food engineering, 2004, v. 64, no. 3, p. 301-305 How to cite?
Journal: Journal of Food Engineering 
Abstract: The effect of different pH and addition of ferulic acid, tannin, cornstarch and hydrogen peroxide into the film forming solutions on in vitro protein digestibility, content of available lysine, and mechanical and water vapor barrier properties of films made of soy protein isolate were investigated in our experiment. The results showed that protein digestibility and content of available lysine decreased after film formation. Moderately higher pH, addition of cornstarch, ferulic acid and tannin improved mechanical and water barrier properties. However, except for the addition of cornstarch, these substances further decreased protein digestibility and the content of available lysine compared with the same pH treatment. Addition of hydrogen peroxide decreased protein digestibility but did not greatly improve the mechanical and water vapor barrier properties of film. It seemed that a full estimation of the nutritional properties of protein based edible films is necessary before they launch into industrial application as edible films rather than as general packaging materials.
URI: http://hdl.handle.net/10397/29619
ISSN: 0260-8774
DOI: 10.1016/j.jfoodeng.2003.10.013
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