Plak gigi terbentuk oleh biofilm yang menutupi permukaan gigi. Biofilm merupakan lapisan lendir yang terdiri dari jutaan sel bakteri, saliva dan sisa makanan. Ketika pembentukan biofilm tidak terkendali, maka akan dengan mudah menebal di permukaan gigi yang disebut dengan plak. Biofilm ini merupakan tempat yang baik untuk kolonisasi dan pertumbuhan berbagai jenis bakteri salah satunya adalah bakteri Streptococcus mutans. Bakteri S. mutans dapat membentuk koloni yang melekat erat pada permukaan gigi dan merupakan bakteri kariogenik yang mampu memfermentasikan sukrosa (karbohidrat) menjadi asam, menurunkan pH permukaan gigi dan menyebabkan mineralisasi gigi. Sehingga untuk pengendalian bakteri tersebut digunakan sediaan yang mengandung antibakteri, salah satunya dari bahan alam yaitu kecombrang. Penelitian ini bertujuan mengetahui aktivitas antibakteri dari ekstrak batang Etlingera elatior yang diekstraksi oleh pelarut berdasarkan perbedaan tingkat kepolaran. Pengujian aktivitas antibakteri ekstrak dibagi menjadi 5 kelompok yaitu untuk ekstrak n-heksana, etil asetat, etanol 20, 40, 60 dan 80%, kontrol positif minosep dan kontrol negatif (DMSO). Hasil skrining fitokimia menunjukkan bahwa tanaman E. elatior mengandung metabolit sekunder flavonoid, tanin, saponin, triterpenoid dan alkaloid. Ekstrak etil asetat memiliki aktivitas antibakteri kategori kuat terhadap S.
Ethyl acetate extract of gandaria (Bouea macrophylla Griff) has very strong antioxidant activity. The aims of this study are to separate and characterize the active fraction of antioxidants and determine the antioxidant activity quantitatively. Ethyl acetate extract of B. macrophylla was separated by gravity column chromatography. Fraction separating was guided with qualitative testing of antioxidant activity. Active fraction result of separation was characterized by liquid chromatography-mass spectroscopy and quantitatively analyzed antioxidant activity using the 2.2-diphenyl-1-picrylhydrazyl method. Naringenin and luteolin were identified in the D-2 fraction which had very strong antioxidant activity with an IC50 value of 2.13 ppm. The hydroxyl group OH group of naringenin and luteolin compounds was thought to play a role in the reduction of free radicals.
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 dan flavonoid serta mengetahui aktivitas inhibisi enzim tirosinase dari freeze dry jus buah S. cumini. Metode yang digunakan pada penetapan kadar fenolik dan flavonoid menggunakan metode spektrofotometri UV-Vis serta uji inhibisi enzim tirosinase dengan secara in vitro meggunakan ELISA (Enzyme Linked Immunosorbent assay) Freeze dry jus buah S.cumini mengandung fenolik total sebesar 0,13155 mg GAE/g dan flavonoid total 37,333 mgQE/g. Freeze dry jus buah S. cumini memiliki potensi sebagai inhibitor enzim tirosinase pada 31,25 ppm (14,846%), 62,5 ppm (16,246%), 125 ppm (19,238%), 250 ppm (22,059%), 500 ppm (25,665%), 1000 ppm (32,283%) dan 2000 ppm (44,188%).
Background: Kidney stones are one of the causes of chronic and acute kidney failure symptoms. The flavonoid compounds in Chromolaena odorata leave extract are thought to dissolve calcium in kidney stones. Objective: This study aims to determine the activity of Chromolaena odorata leaves extract as a laxative for calcium kidney stones and to characterize the active extract with a liquid chromatograph mass spectrometry. Methods: The leaves of Chromolaena odorata were extracted by ultrasonication method using 3 solvents in stages, namely n-hexane, ethyl acetate, and methanol. The powder for kidney stones was immersed in an extract solution of n-hexane, ethyl acetate, and methanol for 5 hours at 37° C. The reaction results were analyzed for their absorbance using a UV-Vis spectrophotometer. The fraction with the best activity was analyzed for phytochemical content with various typical reagents and LCMS. Results: Methanol extract of Chromolaena odorata has a better effect in dissolving calcium kidney stones. Methanol extract of Chromolaena odorata can reduce calcium in kidney stones with an EC50 value of 16801 µg/mL. Based on phytochemical tests and LCMS analysis, the methanol extract of Chromolaena odorata leaves contains compounds of the tannins, alkaloids, flavonoids, and steroids. Chromatogram at a retention time of 7.76; 8.96; and 10.01 in the methanol extract of Chromolaena odorata identified 3,5,7,4'-tetrahydroxy-8,3'-dimethoxyflavone; 5,7,4’-trihydroxy-3’,5’-dimethoxyflavone, and 5,6,7,8,4'-pentamethoxyflavone compounds. Conclusion: Methanol extract had the best calcium decay activity in kidney stones with an EC50 value of 16801 µg/mL. 3,5,7,4'-tetrahydroxy-8,3'-dimethoxyflavone; 5,7,4’-trihydroxy-3’,5’-dimethoxyflavone, and 5,6,7,8,4'-pentamethoxyflavone compounds are contained in methanol extract which is thought to play a role in shedding calcium in kidney stones.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.