Zein−iodine complex studied by FTIR spectroscopy and dielectric and dynamic rheometry in films and precipitates

Singh, Narpinder, Georget, Dominique M R, Belton, Peter S and Barker, Susan A (2009) Zein−iodine complex studied by FTIR spectroscopy and dielectric and dynamic rheometry in films and precipitates. Journal of Agricultural and Food Chemistry, 57 (10). pp. 4334-4341. ISSN 1520-5118

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Abstract

In the present study the effect of iodine on properties of zein films and zein precipitates obtained after hydrophobic aggregation was evaluated. Zein films were cast with and without glycerol (as plasticizer) after incorporation of iodine at different levels (2-8%, zein wt basis). Zein films were characterized by secondary structure (determined by infrared spectroscopy) and dielectric and mechanical properties. The rheological properties of zein precipitates as a function of frequency and temperature were evaluated using a dynamic rheometer. Inclusion of iodine changed the secondary structure of zein films and decreased their tensile strength as well as strain at failure. In aggregates, changes in G' (elastic modulus) and G'' (viscous modulus) during heating were affected by the presence of iodine due to the inhibition of aggregation. The water-holding capacity of precipitates precipitated in the presence of iodine was higher than that of those without iodine.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Chemistry (former - to 2024) Faculty of Science > School of Pharmacy (former - to 2024)
UEA Research Groups:	Faculty of Science > Research Groups > Biophysical Chemistry (former - to 2017)
Depositing User:	Rachel Smith
Date Deposited:	12 Apr 2011 09:44
Last Modified:	24 Sep 2024 09:19
URI:	https://ueaeprints.uea.ac.uk/id/eprint/28948
DOI:	10.1021/jf900436q

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