Herlina, Lenni and -, Prof. Dr. Muhtadi, M.Si (2021) PENETAPAN KADAR GLUKOMANAN DAN ASAM OKSALAT DALAM EKSTRAK ETANOL UMBI SUWEG (Amorphophallus paeoniifolius) BESERTA UJI AKTIVITAS ANTIOKSIDAN DAN ANTIBAKTERINYA. Skripsi thesis, Universitas Muhammadiyah Surakarta.
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Abstract
Tubers suweg (Amorphophallus paeoniifolius) is a plant that is reported to have glucomanan content that is a typical fiber carbohydrate and is found in plants Amorphophallus sp. As well as oxalic acid is also reported to accumulate a lot in the tubers suweg. This study aims to determine glucomanan levels, oxalic acid levels, antioxidant and antibacterial activity of ethanol extract of suweg tubers. Determination of glucomanan levels is done by reducing sugar test method using 3.5-dinitrosalysylic acid (DNS) reagent with UV-Vis spectrophotometer instrument. Oxalic acid levels are determined using permanganometric titration method based on reaction by potassium permanganate (KMnO4). While the test of antioxidant activity is determined by DPPH method and antibacterial activity is measured by well diffusion method against samples from gram-positive and gram-negative bacteria. The results showed that glucomanan levels in suweg tubers amounted to 15.11% ±3.32 and oxalic acid levels averaged 1.58% ±0.02. The results of antioxidant activity test showed that suweg tubers have the potential to ward off free radicals with an IC50 value of 81.34 ppm. While the test results of antibacterial activity with concentrations of 1.5 mg/well, 2.5 mg/well and 3.5 mg/well more showed the potential of antibacterial to bacteria Staphylococcus aureus when compared to bacteria Escherichia coli based on the diameter of the bland zone.
| Item Type: | Karya ilmiah (Skripsi) |
|---|---|
| Uncontrolled Keywords: | Amorphophallus paeoniifolius, glucomannan, DPPH, antibacterial. |
| Subjects: | R Medicine > R Medicine (General) |
| Divisions: | Fakultas Farmasi > Farmasi |
| Depositing User: | LENNI HERLINA |
| Date Deposited: | 23 Feb 2021 01:44 |
| Last Modified: | 23 Feb 2021 01:44 |
| URI: | http://eprints.ums.ac.id/id/eprint/89895 |
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