?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=UJI+AKTIVITAS+ANTIOKSIDAN+SENYAWA+FUKOSANTIN+DARI%0D%0ACyclotella+striata+MENGGUNAKAN+METODE+VOLTAMMETRI+SIKLIK&rft.creator=WULANDARI+%2C+1817011018&rft.subject=001+Ilmu+pengetahuan&rft.description=Fukosantin+merupakan+salah+satu+pigmen+utama+dari+karotenoid+laut+yang%0D%0Abersumber+dari+makroalga+dan+mikroalga+jenis+diatom.+Fukosantin+memiliki%0D%0Akemampuan+dalam+meredam+radikal+bebas+sehingga+berpotensi+untuk%0D%0Adikembangkan+sebagai+antioksidan+alami.+Metode+voltammetri+siklik+menjadi%0D%0Ametode+alternatif+untuk+penentuan+aktivitas+antioksidan+fukosantin+karena%0D%0Amemiliki+kelebihan+berupa+sensitivitas%2C+kecepatan%2C+dan+sederhana.+Penelitian+ini%0D%0Abertujuan+untuk+mengukur+nilai+arus+dan+potensial+fukosantin+serta+menentukan%0D%0Aaktivitas+antioksidan+senyawa+fukosantin+dari+C.striata+menggunakan+metode%0D%0Avoltammetri+siklik.+Fukosantin+diperoleh+pada+penelitian+ini+melalui+tahapan%0D%0Akultivasi%2C+preparasi+seperti+pemanenan%2C+ekstraksi+menggunakan+pelarut+etanol%2C%0D%0Apemisahan+dengan+kolom+kromatografi+terbuka%2C+identifikasi+menggunakan+kolom%0D%0Akromatografi+lapis+tipis+(KLT).+Pemurnian+fukosantin+menggunakan+Medium%0D%0Apressure+Liquid+Chromatography+(MPLC)%2C+identifikasi+fukosantin+berdasarkan%0D%0Akarasteristik+serapan+Visible+pada+daerah+%CE%BBmaks+448+nm%2C+dan+uji+aktivitas%0D%0Aantioksidan+menggunakan+metode+voltammetri+siklik.+Voltammogram+fraksi%0D%0Afukosantin+konsentrasi+3+mM+memiliki+aktivitas+antioksidan+yang+paling+baik%0D%0Aditunjukkan+dengan+nilai+puncak+arus+oksidasi+(Ipa)+yaitu+8%2C68+%CE%BCA+dan+nilai+puncak%0D%0Apotensial+oksidasi+(Epa)+yakni+sebesar+0%2C487+V.+Nilai+koefisien+aktivitas%0D%0Aantioksidan+fraksi+fukosantin+memberikan+nilai+slope+dengan+kemiringan+negatif%0D%0Asebesar+0%2C277.+Nilai+puncak+arus+oksidasi+(Ipa)%2C+puncak+potensial+oksidasi+(Epa)%2C%0D%0Adan+nilai+koefisien+aktivitas+antioksidan+fraksi+fukosantin+tersebut+menunjukkan%0D%0Afukosantin+memiliki+aktivitas+antioksidan+yang+baik%2C+sehingga+dapat%0D%0Adikembangkan+sebagai+antioksidan+alami.%0D%0AKata+kunci%3A+C.striata%2C+fukosantin%2C+antioksidan%2C+voltammetri+siklik.%0D%0A%0D%0AFucoxanthin+is+one+of+the+main+pigments+of+marine+carotenoids+which+are+sourced%0D%0Afrom+macroalgae+and+microalgae+of+the+diatom+type.+Fucoxanthin+has+the+ability%0D%0Ato+reduce+free+radicals+so+that+it+has+the+potential+to+be+developed+as+a+natural%0D%0Aantioxidant.+The+cyclic+voltammetry+method+is+an+alternative+method+for%0D%0Adetermining+the+antioxidant+activity+of+fucoxanthin+because+it+has+the+advantages%0D%0Aof+sensitivity%2C+speed%2C+and+simplicity.+This+study+aims+to+measure+the+current+and%0D%0Apotential+values+of+fucoxanthin+and+determine+the+antioxidant+activity+of%0D%0Afucoxanthin+compounds+from+C.+striata+using+the+cyclic+voltammetry+method.%0D%0AFucoxanthin+was+obtained+in+this+study+through+the+stages+of+cultivation%2C%0D%0Apreparation+such+as+harvesting%2C+extraction+using+ethanol+solvent%2C+separation+using%0D%0Aopen+column+chromatography%2C+identification+using+column+thin+layer%0D%0Achromatography+(TLC).+Purification+of+fucoxanthin+using+Medium+pressure%0D%0ALiquid+Chromatography+(MPLC)%2C+identification+of+fucoxanthin+based+on+Visible%0D%0Aabsorption+characteristics+at+%CE%BBmax+448+nm%2C+and+testing+of+antioxidant+activity+using%0D%0Acyclic+voltammetry+method.+The+voltammogram+of+the+fraction+of+fucoxanthin+at%0D%0Aa+concentration+of+3+mM+had+the+best+antioxidant+activity+as+indicated+by+the+peak%0D%0Avalue+of+the+oxidation+current+(Ipa)+of+8.68+%CE%BCA+and+the+peak+value+of+the+oxidation%0D%0Apotential+(Epa)+of+0.487+V.+The+coefficient+value+of+the+antioxidant+activity+of+the%0D%0Afucoxanthin+fraction+gives+a+slope+value+with+negative+slope+of+0.277.+The+peak%0D%0Avalue+of+oxidation+current+(Ipa)%2C+peak+oxidation+potential+(Epa)%2C+and+the+coefficient%0D%0Avalue+of+the+antioxidant+activity+of+the+fucoxanthin+fraction+show+that+fucoxanthin%0D%0Ahas+good+antioxidant+activity%2C+so+it+can+be+developed+as+a+natural+antioxidant.%0D%0AKey+words%3A+C.striata%2C+fukosantin%2C+antioxidants%2C+cyclic+voltammetry.&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2023-01-26&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F69664%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F69664%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F69664%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520DAN%2520PEMBAHASAN.pdf&rft.identifier=++WULANDARI+%2C+1817011018++(2023)+UJI+AKTIVITAS+ANTIOKSIDAN+SENYAWA+FUKOSANTIN+DARI+Cyclotella+striata+MENGGUNAKAN+METODE+VOLTAMMETRI+SIKLIK.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F69664%2F