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Roy Indrianto Bangar Siagian
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Uji Aktivitas Antioksidan Ekstrak Etanol Daun Salam (Syzygium Polyanthum (Wight) Walp.) Dengan Metode DPPH Wilson Kanggaran; Razoki, Razoki; Roy Indrianto Bangar Siagian; Hariyadi Dharmawan Syahputra
Jurnal Sains Farmasi Dan Kesehatan Vol. 3 No. 1 (2025): Mei - Agustus
Publisher : CV. ITTC INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62379/jfkes.v3i1.2927

Abstract

Bay leaf (Syzygium polyanthum (Wight) Walp.) is known to contain phenolic and flavonoid compounds with potential as natural antioxidants. This study aims to evaluate the antioxidant activity of ethanol extract of bay leaves using the DPPH method and to identify the bioactive compounds through phytochemical screening and simplicia characterization. Extraction was conducted using maceration with 80% ethanol as the solvent. Characterization result showed that the bay leaf simplicial met the standards of the Farmakope Herbal Indonesia. Phytochemical screening revealed positive results for alkaloids, flavonoids, saponins, tannins, and phenols. The antioxidant activity test showed that the ethanol extract of bay leaves had an IC50 value of 15,45 ppm, which falls into the very strong antioxidant category. These findings reinforce the potential of bay leaf as a natural antioxidant source that can be further developed in pharmaceutical and health applications.
Efek Pemberian Fraksi Etil Asetat Ekstrak Etanol Kulit Buah Jeruk Bali (Citrus Maxima Merr) terhadap Kadar Glukosa Darah Tikus Hiperglikemia Desita, Maya; Roy Indrianto Bangar Siagian; Astriani Natalia Br Ginting
JOURNAL SAINS STUDENT RESEARCH Vol. 3 No. 6 (2025): Jurnal Sains Student Research (JSSR) Desember
Publisher : CV. KAMPUS AKADEMIK PUBLISING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61722/jssr.v3i6.7120

Abstract

Diabetes Mellitus (DM) is a metabolic disorder characterized by elevated blood glucose levels (hyperglycemia). Herbal medicine is often used as an alternative treatment, and pomelo peel (Citrus maximaMerr) is believed to have potential as an antihyperglycemic agent due to its content of bioactive compounds such as flavonoids and vitamin C. This study aimed to examine the antihyperglycemic effect of the ethyl acetate fraction of the ethanol extract of pomelo peel (Citrus maxima Merr) in alloxan-induced Wistar rats. Hyperglycemic rats were divided into 6 groups (Normal Control, Negative Control, Positive Control/Metformin, and Fraction Doses of 125, 250, 500 mg/kgBW). The treatment was administered for 14 days. The results showed that the pomelo peel ethyl acetate fraction significantly reduced the blood glucose levels of the hyperglycemic rats, with the effect becoming clearly visible by Day 9. This reduction effect was dose-dependent, where the 500 mg/kgBW dose provided the most optimal antihyperglycemic effect, closely approaching the effect of Metformin and the normal group. The ethyl acetate fraction ofpomelo peelis effective in lowering the blood glucose levels of hyperglycemic rats. This activity is strongly suspected to originate from the content of active compounds such as flavonoids, saponins, and alkaloids.
Co-Authors Astriani Natalia Br Ginting Desita, Maya Hariyadi Dharmawan Syahputra Razoki, Razoki Wilson Kanggaran