Çolakoğlu, SerhatTürker, GülenAk, İlknurÇolakoğlu, Fatma2025-01-272025-01-2720192148-127Xhttps://doi.org/10.24925/turjaf.v7isp1.150-153.2790https://search.trdizin.gov.tr/tr/yayin/detay/373776https://hdl.handle.net/20.500.12428/15592This study reports on the evaluation of the antioxidant of ethanolic extracts of Mytilusgalloprovincialis and Ruditapes philippinarum collected from the Marmara Sea. The antioxidantactivity of the two bivalve species was evaluated using the 2,2-diphenyl-2-picrylhydrazyl (DPPH)free radical scavenging method. The total carotenoid contents were also determined. In the DPPHmethod, all extracts exhibited low radical scavenging activity when compared to the standards used,i.e. ?-tocopherol and butylated hydroxytoluene (BHT) with the inhibition percentage in the range of35.87±0.05 – 36.27±0.02%. In particular, M. galloprovincialis exhibited the highest radicalscavenging activity with an IC50 value of 29.55±0.02 mg/g Ext. However, there are no statisticallysignificant differences in the IC50 values of two species. The highest total carotenoid content wasfound in M. galloprovincialis as 1.13±0.02 ?g/g sample. The statistically significant differenceswere found in total carotenoid contents of two bivalves. In this study in M. galloprovincialis wasalso found to be high in carotenoid content, while R. philippinarum was found to be almostnonexistent. More detailed studies are needed to determine relationship between the bioactivecompounds of crustaceans and their antioxidant activities, distributed in our country.eninfo:eu-repo/semantics/openAccessGıda Bilimi ve TeknolojisiArticle7Sp115015310.24925/turjaf.v7isp1.150-153.2790373776