Abstract
The in vivo bioavailability of soy protein isolates and corn zein film material before and after film formation by heat/ pressure was determined. The In vitro digestibility of corn zein before and after film formation was also measured. Films were produced from anhydrous protein with 30% glycerol added using a heat-press method with no use of casting solvents or cross-linking agents. Corn zein raw and film material were ground under liquid nitrogen then digested in two enzyme-acid cocktails with free amino acid analysis before and after digestion. The protein efficiency ratio and net protein ratio were determined for both zein and soy protein using a weanling Sprague-Dawley descended rat feeding study. The In vitro digestibility study indicated that the non-heat pressed corn zein was more digestible than the heat pressed zein. However, the in vivo results indicated that corn and soy protein were equally bioavailable whether they were derived from film mixture prior to or after film formation. Both corn zein and soy protein material had lower protein efficiency ratio than the control diet. Furthermore, soy protein films materials had a higher protein efficiency ratio than corn zein.
Highlights
With increased public environmental consciousness, the interest in bio-based packaging has increased
Packaging materials that are produced from renewable resources that can biodegrade after disposal and that can be utilized by plants and animals as nutrients are one solution to solid waste disposal to minimize the environmental impact of packaging
The soy protein isolate groups released faecal nitrogen in quantities between 1.9% and 2.15%. It can be concluded from the in vitro digestibility assay that non-heat-set corn zein is slightly more digestible than heat-set corn zein film
Summary
With increased public environmental consciousness, the interest in bio-based packaging has increased. Packaging materials that are produced from renewable resources that can biodegrade after disposal and that can be utilized by plants and animals as nutrients are one solution to solid waste disposal to minimize the environmental impact of packaging. Films produced from food proteins are one type of bio-based packaging that reduces the usage of other natural resources. Edible protein films decrease environmental pollution, but can enhance food properties such as flavour, appearance and nutritional value through natural additives or through inherent protein properties imparted to the film [3]. Protein films can carry antimicrobials, antioxidants, and scavengers to prevent food spoilage and increase food safety
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
