Gamma radiation as a modifier of starch – Physicochemical perspective

Sunder, Mridula and Mumbrekar, Kamalesh D and Mazumder, Nirmal (2022) Gamma radiation as a modifier of starch – Physicochemical perspective. Current Research in Food Science, 5. pp. 141-149. ISSN 2665-9271

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Abstract

Starch is one of the most common and abundantly found carbohydrates in cereals, roots, legumes, and some fruits. It is a tasteless, colorless, and odorless source of energy that is present in the amyloplasts of plants. Native starch comprises amylose, a linear α-glucan having α-1,4-linkage and amylopectin, a branched polysaccharide with both α-1,4-linkage and α-1,6-linkage. Due to the low solubility, high viscosity, and unstable pasting property of native starch, it has been restricted from its application in industries. Although native starch has been widely used in various industries, modification of the same by various chemical, enzymatic and physical methods have been carried out to alter its properties for better performance in several industrial aspects. Physical modification like gamma radiation is frequently used as it is rapid, penetrates deeper, less toxic, and cost-effective. Starch when irradiated with gamma rays is observed to produce free radicals, generate sugars owing to cleavage of amylopectin branches, and exhibit variation in enzymatic digestion, amylose content, morphology, crystallinity, thermal property, and chemical composition. These physicochemical properties of the starch due to gamma radiation are assessed using optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), and its application are discussed

Item Type: Article
Uncontrolled Keywords: Starch; Enzymatic hydrolysis; Crystallinity; Amylose content; Amylopectin;Gelatinization;Gamma radiation;
Subjects: Life Sciences > MLSC Manipal
Depositing User: KMC Library
Date Deposited: 24 Jan 2022 08:35
Last Modified: 24 Jan 2022 08:35
URI: http://eprints.manipal.edu/id/eprint/158162

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