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- W1707771641 abstract "Dry biomass of algae is a good source of nutrients and biologically active substances, which in the recent yearsattracted the interest of the specialists in their search for natural, ecologically and healthy sound foods for theanimals. The aim of the present study was to determine the mineral composition, the antioxidant andantimicrobial activities of the dry biomass of freshwater algae (spirogyra genus). The freshwater algae werecollected in February and March 2010 at the pond of Jomo Kenyatta University of Agriculture and Technology(JKUAT). The Mineral content by acid digestion (HNO3:HClO4) in mg / 100g was as high as 387.22 ± 38.72 for Ca andas low as 2.53 ± 0.48 for Cu. Phytochemical screening of methanolic and water extract showed the presence ofalkaloids steroids, flavonoids, tannins, terpenoids, but only the water extract showed the presence of totalreducing sugars. The content of phenolic compounds and tannins was respectively 10.63 ± 0.05g gallic acid/100g ofextract and 0.399 ± 0.02g tannic acid/100g of dried sample and the level of flavonoids was 6.86 ± 0.14gQuercetin/100g of extract. The algal antioxidant activity expressed in a dose able to decrease the initial DPPHconcentration by 50% was 0.078 mg/ml. The antimicrobial activity was found only for methanolic extract againstEscherichia coli and Candida albicans but no antimicrobial activity for aqueous extract. The freshwater algae usedin this study were identified as Spirogyra nitida associated Spirogyra weberi both filamentous green algae. Themineral composition showed that they contain minerals which give the possibility of using them as food for fishand also by human as food supplement. The levels of Ca, Mg and Fe were very high as the Spirulina and Chlorellaare used as food supplement. The strains showed a relative antioxidant and antimicrobial activities." @default.
- W1707771641 created "2016-06-24" @default.
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- W1707771641 date "2013-10-04" @default.
- W1707771641 modified "2023-09-26" @default.
- W1707771641 title "MINERAL COMPOSITION, ANTIOXIDANT AND ANTIMICROBIAL ACTIVITIES OF FRESHWATER ALGAE (SPIROGYRA GENUS)" @default.
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