4-6 February 2019
Centara Grand at Central Ladprao
Asia/Bangkok timezone
Deadline for full paper revision: 21 May 2019.

Effects of Gamma Irradiation on Antioxidant Activities and Chemical Properties in $\textit{Agaricus bisporus}$ Mushrooms

4 Feb 2019, 14:50
1h
Centara Grand at Central Ladprao

Centara Grand at Central Ladprao

Chatuchak, Bangkok 10900, Thailand
Poster Agriculture and Food Poster 1

Speaker

Ms Wachiraporn Pewlong (Thailand Institute of Nuclear Technology (Public Organization))

Description

$\textit{Agaricus bisporus}$ is easily perishable and subject to microbial contamination. The present study aspires to follow antioxidant activities and chemical changes of $\textit{Agaricus bisporus}$ after being exposed to gamma radiation. Powder samples were irradiated at 2.5, 5, 7.5 and 10 kGy. Subsequently, antioxidant activities, total protein content and total soluble polysaccharide content of irradiated samples were evaluated. Result showed that gamma irradiation up to 10 kGy did not significantly affect antioxidant activities. 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) value of non-irradiated and irradiated samples ranged from 2.07 ± 0.09 to 2.19 ± 0.14 mgAAE/g, whereas ferric ion reducing antioxidant power (FRAP) of irradiated samples varied from 32.74 ± 0.39 to 34.52 ± 1.45 μmolFeSO$_4$/g. Total phenolic contents were between 7.24 ± 0.38 and 7.65 ± 0.53 mgGAE/g. In terms of chemical properties, gamma radiation at 10 kGy showed no significant differences in total protein content and total water soluble polysaccharide content. Total protein contents were found from 42.46 ± 0.28 to 43.18 ± 0.13 %w/w. Amount of total water soluble polysaccharide content in non-irradiated and irradiated samples varied from 5.49 ± 0.15 to 5.72 ± 0.14 %w/w.

Primary author

Ms Wachiraporn Pewlong (Thailand Institute of Nuclear Technology (Public Organization))

Co-authors

Mr Surasak Sajjabut (Thailand Institute of Nuclear Technology) Ms Jaruratana Eamsiri (Thailand Institute of Nuclear Technology) Ms Sirilak Chookaew (Thailand Institute of Nuclear Technology)

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