Article (Scientific journals)
Gamma radiation induced modifications of tapioca starch
Atrous, Hager; Benbettaïeb, Nasreddine; Hosni, Faouzi et al.
2016In Asian Academic Research Journal of Multidisciplinary, 3 (3), p. 187-220
Peer reviewed
 

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Keywords :
Tapioca starch; gamma radiation; granule morphology; structure-function relationships
Abstract :
[en] The effect of gamma radiation (3, 5, 10, 20, 35 and 50 kGy) on the morphological, structural, physicochemical, pasting and thermal properties of tapioca starch was studied. Microphotographs of scanning electron microscopy and polarized light microscopy revealed the absence of morphological changes induced by gamma radiation. The X-ray diffraction spectra showed that irradiation treatment did not influence the shape and intensity of X-ray diffraction peaks. The presence of free radicals in the irradiated tapioca starch was confirmed by electron spin resonance spectrometry. Fourier transform infrared spectroscopy showed that the irradiated starch displayed a significant decrease in the intensity of the O–H and C–H stretches, bending modes of water and glycosidic linkages. Irradiation improved the water solubility index of starch granules and depressed the apparent amylose content. An increase in the swelling power was observed after irradiation treatment until 20 kGy, followed by a decrease at higher doses. Brabender viscoamylograph test showed that the maximal consistency of the starch paste decreased significantly with increasing irradiation dose. There was no significant difference in the gelatinization temperatures, as well as the corresponding transition enthalpies among native and irradiated tapioca starch samples, as shown in the differential scanning calorimetry thermograms.
Disciplines :
Food science
Author, co-author :
Atrous, Hager
Benbettaïeb, Nasreddine
Hosni, Faouzi
Danthine, Sabine  ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Science des alim. et formul.
Blecker, Christophe ;  Université de Liège > Agronomie, Bio-ingénierie et Chimie (AgroBioChem) > Science des alim. et formul.
Attia, Hamadi
Ghorbel, Dorra
Language :
English
Title :
Gamma radiation induced modifications of tapioca starch
Publication date :
March 2016
Journal title :
Asian Academic Research Journal of Multidisciplinary
eISSN :
2319-2801
Publisher :
Asian Academic Research Associates
Volume :
3
Issue :
3
Pages :
187-220
Peer reviewed :
Peer reviewed
Available on ORBi :
since 28 April 2016

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