Improving antioxidant activity and nutritional components of Philippine salt-fermented shrimp paste through prolonged fermentation |
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Authors: | Ernestina M Peralta Hideo Hatate Daisuke Kawabe Rui Kuwahara Shinji Wakamatsu Tamami Yuki Hisashi Murata |
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Affiliation: | 1. Institute of Fish Processing Technology, College of Fisheries and Ocean Sciences, University of the Philippines Visayas, Miagao, Iloilo 5023, Philippines;2. Faculty of Agriculture, Miyazaki University, 1-1 Gakuenkibanadai-nishi, Miyazaki 8892192, Japan |
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Abstract: | The antioxidant activity and nutritional components of Philippine salt-fermented shrimp paste were improved through prolonged fermentation (90, 180, and 360 days). The antioxidant ability against 1,1-diphenyl-2-picryhydrazyl (DPPH) radical, hydrogen peroxide, and lipid peroxidation increased significantly with prolonged fermentation and were suggested to be related with the Maillard reaction products formed, as measured by the characteristic browning and fluorescent developments. Polyunsaturated fatty acids like eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) in the shrimp paste were not substantially damaged for 360 days, while free amino acid content dramatically increased at 90 days. However, excessive fermentation showed slight but significant decrease in free amino acids and increase in ammonia. These results suggest that properly prolonged fermentation would improve antioxidant ability and some nutritional value in the salt-fermented shrimp paste. |
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Keywords: | Free radical scavenger Fermented fish Maillard reaction EPA DHA Amino acid |
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