2022
DOI: 10.31001/jfi.v19i1.1331
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PENETAPAN KADAR FENOLIK DAN FLAVONOID SERTA AKTIVITAS INHIBISI ENZIM TIROSINASE FREEZE DRY JUS BUAH JAMBLANG (Syzygium cumini (L.) Skeels)

Abstract: Kulit merupakan organ terbesar yang melindungi tubuh dari berbagai trauma seperti radiasi termal, kimia, dan ultraviolet. Biosintesis melanin yaitu perubahan senyawa dari L-Tirosin (4-hydroxyphenylalanine) menjadi L-DOPA (L-3,4-dihydroxyphenylalanine) dengan bantuan enzim tirosinase.  Fenolik dan flavonoid dilaporkan secara signifikan dapat mempengaruhi penghambatan aktivitas tirosinase. Fenolik dan flavonoid diduga terkandung dalam buah Syzygium cumini. Penelitian ini bertujuan untuk menentukan kadar fenolik … Show more

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“…The reaction of the AlCl3 reagent with quercetin can be observed in Figure 3. The principle of flavonoid determination with the AlCl3 colorimetric method involves the formation of a colored complex with aluminum chloride (AlCl3) with keto groups at the C-4 atom and hydroxy groups at the C-3 or C-5 atoms grouped into flavones and flavonols [23]. The antioxidant properties of flavonoids come from their capacity to contribute hydrogen atoms or their ability to chelate metals [24].…”
Section: Total Flavonoid Content (Tfc)mentioning
confidence: 99%
“…The reaction of the AlCl3 reagent with quercetin can be observed in Figure 3. The principle of flavonoid determination with the AlCl3 colorimetric method involves the formation of a colored complex with aluminum chloride (AlCl3) with keto groups at the C-4 atom and hydroxy groups at the C-3 or C-5 atoms grouped into flavones and flavonols [23]. The antioxidant properties of flavonoids come from their capacity to contribute hydrogen atoms or their ability to chelate metals [24].…”
Section: Total Flavonoid Content (Tfc)mentioning
confidence: 99%