A Recent Approach on Process Optimization and Characterization of Gamma Irradiation Induced Variations in Functional Properties of Maize (Zea mays L.) Flour

A Recent Approach on Process Optimization and Characterization of Gamma Irradiation Induced Variations in Functional Properties of Maize (Zea mays L.) Flour

The effect on the functional properties of maize flour of particle size and high dose gamma irradiation has been studied. Maize flour collected from 80, 60 and 40 mesh sieves at three particle size levels (<177, <250 and <420 μm) was irradiated in clear glass bottles at three gamma radiation doses (25, 50 and 75 kGy) using a gamma source of 60Co. In response to an increase in the particle size of the flour, a significant linear increase in water holding and swelling capacity and bulk density and a significant linear decrease in emulsifying stability were observed. A significant linear positive effect on water holding ability and solubility, but a significant linear negative effect on oil holding capacity, protein solubility and bulk density values, was observed in the Gamma radiation dose. These observed trends in the functional properties of maize flour with the application of gamma irradiation indicate that the consistency of maize flour can be improved through the irradiation process with regard to the manufacture and packaging of food items. It was found that the particle size of the flour was directly correlated with the ability to retain water, the swelling capacity and the bulk density of the flour. In addition, gamma radiation has a beneficial effect on enhancing the absorption of water and oil, swelling, and emulsifying ability of maize flour.

Author (s) Details

Haq Nawaz
Department of Biochemistry, Bahauddin Zakariya University, Multan-60800, Pakistan.

Muhammad Aslam Shad
Department of Biochemistry, Bahauddin Zakariya University, Multan-60800, Pakistan.

Sonia Safdar
Institute of Chemical Sciences, Bahauddin Zakariya University, Multan-60800, Pakistan.

Raheela Jabeen
Department of Biochemistry and Biotechnology, Women University, Multan-60800, Pakistan.

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