Assessing antioxidant activity of some varieties of gamma-irradiated brazilian soybean by ESR
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2004
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INTERNATIONAL JOINT MEETING/CONGRESO INTERNACIONAL CONJUNTO
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Resumo
Soybean production and utilization as food has increased during the last decades. The
protein and oil contents are high in quantity and quality. Soy is natural source of
flavonoids - biologically active components that are thought to possess antioxidant effects
in vivo and in vitro systems. Alongside traditional methods of processing and preserving
food, the technology of food irradiation, is gaining more and more attention around the
world. This study was undertaken to investigate by means of electron paramagnetic
resonance (EPR) the stability of free radicals generated by radiation processing on three
different soybean cultivars. The soybean cultivars investigated were gamma-irradiated
with doses of 0, 2.0, 5.0, 10.0 and 15.0kGy. Both irradiation and EPR measurements were
performed at room temperature. The EPR signal intensity correlated well with the
ionizing radiation dose. EPR spectra were recorded 16h, 11 days and 40 days after
irradiation. The results showed that the EPR signal intensities remained almost constant
up to 40 days after irradiation for all the varieties assayed. Further experiments are
required in order to identify the species responsible for the EPR peaks and the proper
antioxidant capability of these soybean cultivars against the radiation-induced oxidative
shock.
Como referenciar
OLIVEIRA, M.R.R.; DEL MASTRO, N.L. Assessing antioxidant activity of some varieties of gamma-irradiated brazilian soybean by ESR. In: INTERNATIONAL JOINT MEETING/CONGRESO INTERNACIONAL CONJUNTO, Jul. 11-14, 2004, Cancun, Quintana Roo, Mexico. Proceedings... Disponível em: http://repositorio.ipen.br/handle/123456789/17432. Acesso em: 23 Nov 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.