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All Journal SRIWIJAYA JOURNAL OF MEDICINE INDONESIAN JOURNAL OF MEDICAL LABORATORY SCIENCE AND TECHNOLOGY
Martha, Fadhil Rizki
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Health Professions Immunology & microbiology Medicine & Pharmacology Neuroscience Public Health Social Sciences

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Spectroscopic characterization of rosella flower extract (Hibiscus sabdariffa L.) and its antibacterial activity against Enterobacter aerogenes in suspected typhoid cases Rohani, Siti; Martha, Fadhil Rizki; Mundijo, Trisnawati; Yesi Astri; Zilda, Malika; Melianti, Agnes
JURNAL INDONESIA DARI ILMU LABORATORIUM MEDIS DAN TEKNOLOGI Vol 7 No 1 (2025): Advances in biomarkers, therapeutics, and probiotics: Recent updates in medical l
Publisher : Universitas Nahdlatul Ulama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33086/ijmlst.v7i1.5577

Abstract

Typhoid, a serious bacterial disease, has spurred research into natural products like rosella (Hibiscus sabdariffa L.) for potential treatments. This study investigates the chemical components found in Rosella extract using spectroscopy approximation, assisted by Fourier transform infrared spectroscopy (FTIR) and Gas chromatography–mass spectrometry (GC–MS). The antibacterial activity of rosella extract on bacteria from stool cultures of suspected typhoid cases continues to be evaluated. The antibacterial experimental employed a post-test-only control group design, using 30 μg Chloramphenicol as a positive control, sterile distilled water as the negative control, rosella extract at concentrations of 25%, 50%, 75%, and 100% as the observed variable. Stool samples from typhoid patients were identified, and Enterobacter aerogenes were detected using VITEK®2 testing. Cultivated bacteria from the samples were tested to determine the antibacterial activity of the rosella extract. Phytochemical studies confirmed the presence of tannins, alkaloids, flavonoids, and saponins in the rosella extract. Additionally, the spectroscopic evaluation from FTIR and GC-MS showed the presence of chemical groups, including esters, aldehydes, and aromatics. Further clinical tests demonstrated antibacterial activity at the minimum inhibitory concentration. The results showed an increasing inhibition zone of bacterial growth, correlating with the increase in rosella extract concentration. Although the antibacterial activity of rosella extract was lower compared to commercial Chloramphenicol, this natural product has demonstrated antibacterial activity and shows potential as a candidate for future herbal medicine development.
Identification of Chemical Constituents in Ethanolic Extract of Hibiscus sabdariffa L. Calyces (Roselle) by FTIR and GC-MS: Preliminary Phytochemical Screening Rohani, Siti; Martha, Fadhil Rizki; Astri, Yesi; Putria, Sinta Julia Liona
Sriwijaya Journal of Medicine Vol. 8 No. 3 (2025): Vol 8, No 3, 2025 (Issue In Progress)
Publisher : Fakultas Kedokteran Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32539/sjm.v8i3.360

Abstract

Indonesia is widely recognized for its rich biodiversity, which has long served as a valuable resource for traditional herbal medicine. In recent years, interest in plant-based therapies has grown significantly. One such plant, Hibiscus sabdariffa L., commonly known as Rosella, is valued for its therapeutic properties. These benefits arise from the combined effects of its bioactive compounds, allowing it to address a range of health issues. Research has shown that Rosella contains notable levels of flavonoids, saponins, tannins, and alkaloids—all of which contribute to its antibacterial activity. Techniques such as Fourier-transform infrared (FTIR) spectroscopy and gas chromatography–mass spectrometry (GC-MS) are employed to identify these chemical constituents. FTIR analysis has detected functional groups like amines, fatty acids, aldehydes, carboxylic acids, and aromatic rings. Additionally, GC-MS results have indicated the presence of major compounds belonging to the methyl ester group. Noteworthy identified substances include Hexadecanoic Acid Methyl Ester, Hexadecanoic Acid Ethyl Ester, and Benzenepropanoic Acid, 3,5-Bis(1,1-Dimethylethyl)-4-Hydroxy-, Methyl Ester. A review of existing prior research suggests that these compound groups exhibit significant pharmacological potential, including the usage for antioxidant, anticancer, antibacterial, antidiabetic, and anti-inflammatory effects.
Co-Authors Melianti, Agnes Mundijo, Trisnawati Putria, Sinta Julia Liona Siti Rohani Yesi Astri Yesi Astri Zilda, Malika