Antioxidant properties of natural dietary common Seafoods from Pulicat Coast (original) (raw)
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This study reports the antioxidant potential and chemical composition of muscle from 30 fish species of different feeding habits namely carnivore, herbivore and omnivore. Different in vitro assays used for determining antioxidant potential of extracts of fish species were: thin layer chromatography (TLC) and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging capacity. No significant difference of antioxidant activity or nutrient content was observed among carnivorous, herbivorous and omnivorous fishes. The IC 50 measured by DPPH method varied from 154 to 2139 µg/ml of wet weight. The lowest IC 50 value was observed in C. idellafollowed by P.ticto, C. striatus, C. punctatus, L. rohita, A. testudineus, M. cordyla, O. mossambicus and G. giuris. Themoisture content of samples ranged from 62-85%. The protein content washigh in C. idella (24.3%) and low in L. calbasu (10.57 %). The lipid and ash content analyzed in the selected fish species ranged from 1.17-7.94% and 1.31-4.80%, respectively. Overall, the results suggestthat fish of different feeding habit can be exploited for their antioxidant and nutrients components and used for consumption as well as value addition in food formulations.
Variations of antioxidant biomarkers such as catalase (CAT), superoxide dismutase (SOD) activities and lipid peroxidation (LPO) were studied in edible part of mangrove oyster Saccostrea cucullata, collected from three different water bodies, such as Namkhana (S-I), Frazergaunge (S-II) and Sajnekhali (S-III) of Indian Sundarbans which are exposed to different degrees of anthropogenic activity. The study was conducted for consecutive two years (2010 and 2011) in the respective water bodies. Characteristics of biomarkers in oyster from the two pollutedwater bodies, i.e. S-I and S-II, are similar in nature in comparison to less polluted site (S-III). The catalase, superoxide dismutase activity and lipid peroxidation in oyster flesh exhibit significant (p < 0.01) spatial and temporal variation among the three stations. Oysters from S-I were significantly higher (p < 0.05) in antioxidant enzyme activities than oysters from S-III, which differ in their amount of pollution sources. Maximum antioxidant enzymes activity of all collected samples were recorded in pre-monsoon time and decreased in monsoon season. But maximum lipid peroxidation was noted during monsoon followed by post-monsoon and pre-monsoon. Keywords: antioxidant biomarkers; catalase; Indian Sundarbans; lipid peroxidation; Saccostrea cucullata; superoxide dismutase
Variations of antioxidant biomarkers such as catalase (CAT), superoxide dismutase (SOD) activities and lipid peroxidation (LPO) were studied in edible part of mangrove oyster Saccostrea cucullata, collected from three different water bodies, such as Namkhana (S-I), Frazergaunge (S-II) and Sajnekhali (S-III) of Indian Sundarbans which are exposed to different degrees of anthropogenic activity. The study was conducted for consecutive two years (2010 and 2011) in the respective water bodies. Characteristics of biomarkers in oyster from the two pollutedwater bodies, i.e. S-I and S-II, are similar in nature in comparison to less polluted site (S-III). The catalase, superoxide dismutase activity and lipid peroxidation in oyster flesh exhibit significant (p < 0.01) spatial and temporal variation among the three stations. Oysters from S-I were significantly higher (p < 0.05) in antioxidant enzyme activities than oysters from S-III, which differ in their amount of pollution sources. Maximum antioxidant enzymes activity of all collected samples were recorded in pre-monsoon time and decreased in monsoon season. But maximum lipid peroxidation was noted during monsoon followed by post-monsoon and pre-monsoon.