전자선 조사가 발아현미 분말의 품질에 미치는 영향
Affect of Electron Beam Irradiation on Quality Properties of Germinated Brown Rice Flour
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초록
This study was conducted to evaluate effects on reduction of harmful microorganismscontaminated and changes of γ-aminobutyric acid (GABA) and β-sitosterol in germinated brownrice flour by electron beam (EB) irradiation. Germinated brown rice sprouts with 2 mm lengthwere separated, dried and ground for manufacturing flour. The flour was divided to 6 portionsand EB-irradiated within the absorbed dose of 1, 2, 3, 4 or 5 kGy. Non-irradiated one was used ascontrol. EB irradiation could reduce the numbers of Escherichia coli O157 : H7, Salmonella typhimurium,Listeria monocytogenes, Staphylococus aureus and Bacillus cereus. Data from D10 valuesof microflora also indicated that EB irradiation of 5 kGy could reduce the number of the harmfulmicroorganisms. GABA was not affected by EB irradiation, but β-sitosterol was affected and thecontent decreased. The results appeared that EB irradiation can apply to eliminate the harmfulmicroorganisms contaminated in germinated brown rice sprout for use to processed foods as rawmaterial.
Abstract
This study was conducted to evaluate effects on reduction of harmful microorganismscontaminated and changes of γ-aminobutyric acid (GABA) and β-sitosterol in germinated brownrice flour by electron beam (EB) irradiation. Germinated brown rice sprouts with 2 mm lengthwere separated, dried and ground for manufacturing flour. The flour was divided to 6 portionsand EB-irradiated within the absorbed dose of 1, 2, 3, 4 or 5 kGy. Non-irradiated one was used ascontrol. EB irradiation could reduce the numbers of Escherichia coli O157 : H7, Salmonella typhimurium,Listeria monocytogenes, Staphylococus aureus and Bacillus cereus. Data from D10 valuesof microflora also indicated that EB irradiation of 5 kGy could reduce the number of the harmfulmicroorganisms. GABA was not affected by EB irradiation, but β-sitosterol was affected and thecontent decreased. The results appeared that EB irradiation can apply to eliminate the harmfulmicroorganisms contaminated in germinated brown rice sprout for use to processed foods as rawmaterial.
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