?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=%0D%0APENENTUAN+AKTIVITAS+ANTIOKSIDAN+FIKOBILIPROTEIN+DARI+Oscillatoria+sp.+MENGGUNAKAN+METODE+VOLTAMMETRI+SIKLIK%0D%0A%0D%0A&rft.creator=INTAN+MAILANI+%2C+1217011031&rft.subject=Q+Science+(General)&rft.subject=QD+Chemistry&rft.description=ABSTRAK%0D%0A%0D%0A%0D%0AFikobiliprotein+merupakan+pigmen+protein+yang+berasal+dari+alga+dan+memiliki+potensi++sebagai+antioksidan.+Dalam+penelitian+ini%2C+fikobiliprotein+diisolasi+dari+hasil+kultivasi+Oscillatoria+sp.+dan+diukur+aktivitas+antioksidannya+menggunakan+metode+voltammetry+siklik.+Aktivitas+antioksidan+fikobiliprotein+diukur+dalam+bentuk+ekstrak+kasar+dan+pigmen+murni+(fikosianin)+dengan+asam+askorbat+sebagai+kontrol+positif.+Identifikasi+dengan+spektrofotometri+UV-Vis+menunjukkan+serapan+fikobiliprotein+pada++%CE%BBmaks+620+nm+dan+diperoleh+konsentrasi+dari+ekstrak+kasar+fikobiliprotein+sebesar+3.90+x+10-6+M+dan+konsentrasi+pigmen+murni+(fikosianin)+sebesar+3.02+x+10-6+M.+Data+hasil+voltammogram+pengukuran+aktivitas+antioksidan+fikobiliprotein+dengan+metode+voltammetri+siklik+menunjukkan+terjadinya+reaksi+oksidasi+fikobiliprotein+pada+daerah+potensial+antara+1.2+V+sampai+dengan+1.3+V+dengan+arus+puncak+oksidasi+pigmen+fikosianin+yang+lebih+tinggi+dibandingkan+arus+puncak+oksidasi+ekstrak+kasar.+Dari+sisi+reduksi+oksigen+kemampuan+fikobiliprotein+meredam+radikal+oksigen+terjadi+pada+daerah+potensial+0.85-1.12+V.+Koefisien+aktivitas+antioksidan+yang+diperoleh+dari+ekstrak+kasar+sebesar+0.043+dan+pigmen+fikosianin+sebesar+0.047+sedangkan+untuk+kontrol+positif+asam+askorbat+sebesar+0.018.+Dari+hasil+voltammogram+dan+koefisien+aktivitas+yang+diperoleh+dapat+disimpulkan+bahwa+fikobiliprotein+dalam+bentuk+ekstrak+kasar+dan+pigmen+murni+memiliki+kemampuan+sebagai+antioksidan+lebih+tinggi+dibandingkan+asam+askorbat.%0D%0A%0D%0AKata+kunci+%3A+Fikobiliprotein%2C+Oscillatoria+sp.%2C+antioksidan%2C+fikosianin%2C+voltammetri+siklik.+%0D%0A%0D%0A%0D%0AABSTRACT%0D%0A%0D%0A%0D%0A%0D%0A%0D%0APhycobiliprotein+is+a+pigment+protein+of+algae+and+shows+potential+antioxidation+activity.+In+this+study%2C+phycobiliprotein+isolated+from+the+cultivation+of+Oscillatoria+sp.+and+the+antioxidant+activity+was+measured+using+cyclic+voltammetry+method.+Antioxidant+activity+of+phycobiliprotein+was+measured+in+the+form+of+crude+and+pure+pigment+(phycocyanin)+with+ascorbic+acid+as+a+positive+control.+Antioxidant+activity+of+phycobiliprotein+analyzed+with+UV-Vis+spectrophotometry+and+showed+maximum+absorption+at+620+nm.+The+crude+extract+concentration+is+3.90+x+10-6+M+and+pure+pigment+(phycocyanin)+concentration+is+3.02+x+10-6+M.+Voltammogram+phycobiliprotein+oxidation+reactions+are+at+potential+range+1.2-1.3+V+with+a+current+phycocyanin+pigment+oxidation+peak+higher+than+the+peak+current+of+oxidation+crude+extract.+Antioxidant+coefficient+activity+were+evaluated+by+observed+reduction+potential+of+radical+O2%E2%80%A2-+at++0.85+to+1.12+V.+Antioxidant+coefficient+activity+obtained+from+the+crude+extract+is+0.043+and+for+phycocyanin+pigment+is+0.047+while+ascorbic+acid+as+a+positive+control+is+0.018.+Therefore%2C+the+antioxidant+capability+of+phycobiliprotein+crude+extract+and+pure+pigment+phycocyanin+both+are+higher+than+ascorbic+acid.%0D%0A%0D%0AKeywords%3A+Phycobiliprotein%2C+Oscillatoria+sp.%2C+Antioxidant%2C+phycocyanin%2C+cyclic+voltammetry.%0D%0A&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM&rft.date=2016-08-18&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F23669%2F1%2FABSTRAK%2520%2528ABSTRACT%2529.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F23669%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F23669%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++INTAN+MAILANI+%2C+1217011031++(2016)++PENENTUAN+AKTIVITAS+ANTIOKSIDAN+FIKOBILIPROTEIN+DARI+Oscillatoria+sp.+MENGGUNAKAN+METODE+VOLTAMMETRI+SIKLIK.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F23669%2F