Electron-beam processed corn starch: evaluation of physicochemical and structural properties and technical-economic aspects of the processing

Brazilian Journal of Chemical Engineering

M. Braşoveanu²  M. R. Nemţanu²  D. Duţă¹ 

[1] ,National Institute for Laser, Plasma and Radiation Physics Electron Accelerator Laboratory Bucharest,Romania

关键词: Acidity;    Pasting properties;    Structure;    Processing capacity;    Processing costs;   

DOI  :  10.1590/S0104-66322013000400016

来源: SciELO

【 摘 要 】

The properties of starch can be modified by a variety of methods in order to meet desirable technological needs. Electron beam irradiation is able to induce changes in starch properties. The paper deals with investigation of physicochemical and structural modifications of corn starch processed by electron beam up to 50 kGy and evaluation of the technical-economic aspects of starch processing. Paste viscosity, pasting and peak temperatures decreased in a dose-dependent manner, indicating degradation of the macromolecule. Small circular perforations on the granule surface were observed for 50-kGy irradiated sample. Spectral characteristics suffered minor changes, suggesting that the inter- and intramolecular hydrogen bond stability was affected by the electron beam. These modified starches could find applications in foodstuffs requiring low-viscosity starch. A cost estimate of the electron beam processing of corn starch with an average absorbed dose of 30 kGy showed an increase of corn starch price by 16%.

【 授权许可】

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