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All Journal Jurnal Kartika Kimia International Journal of Medicine and Health
Arini Khaerunnisa
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Nursing Public Health

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Antimicrobial Activity of Ethanol Extract of Walang Leaves against Salmonella typhi and Candida tropicalis Swastika Oktavia; Ayu Febi Lestari; Arini Khaerunnisa
International Journal of Medicine and Health Vol. 4 No. 3 (2025): September : International Journal of Medicine and Health
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/ijmh.v4i3.5931

Abstract

Leaves of Etlingera walang (Blume) RMSm have been empirically used in traditional medicine to relieve stomach disorders and are known to contain secondary metabolites with potential antimicrobial properties. Salmonella typhi infection can cause typhoid fever with symptoms such as diarrhea and abdominal pain, while Candida tropicalis is a fungus that can infect the gastrointestinal tract and lead to digestive disturbances. This study aimed to evaluate the antibacterial and antifungal activities of the ethanolic extract of E. walang leaves against S. typhi and C. tropicalis. The antimicrobial assay was carried out using the disk diffusion method at extract concentrations of 25%, 50%, and 100%, with chloramphenicol and ketoconazole as positive controls, and DMSO as the negative control. Phytochemical screening revealed the presence of alkaloids, flavonoids, saponins, and tannins. However, the results showed that the extract did not produce inhibition zones against either test microorganism. Extract evaluation indicated a moisture content of 12.23%, total ash 13.39% (above the standard), acid-insoluble ash 1.25%, total plate count 1.8 × 10 ⁴ , and mold and yeast count 1.0 × 10 ³. The findings suggest that although the ethanolic extract of E. walang leaves contains secondary metabolites and is traditionally used for stomach ailments, it does not exhibit antimicrobial activity against S. typhi or C. tropicalis.
Aktivitas Penghambatan α-Glukosidase secara in vitro dan in silico serta Penurunan Glukosa Darah pada Mencit dari Ekstrak Etanol Biji Gandaria (Bouea macrophylla) Tarso Rudiana; Eneng Elda Ernawati; Ayu Sunayah; Nuzulia Romadlotun Nikmah; Hasanah Hasanah; Siti Sawalia; Lia Permatasari; Arini Khaerunnisa; Dimas Danang Indriatmoko; Swastika Oktavia; Siti Nurbayti; Muhammad Ihda Hamlu Liwatu Zein
Jurnal Kartika Kimia Vol 9 No 1 (2026): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v9i1.1054

Abstract

Gandaria (Bouea macrophylla) merupakan tumbuhan topis mengandung senyawa golongan fenolik dan flavonoid yang dapat dimanfaatkan sebagai antidiabetes. Penelitian ini bertujuan untuk mengidentifikasi senyawa metabolit sekunder pada ekstrak etanol biji B. macrophylla, menentukan potensi antidiabetes melalui inhibisi enzim α-glukosidase secara in vitro dan in silico serta menentukan penurunan kadar gula darah secara in vivo. Ekstrak etanol biji B. macrophylla memiliki % rendemen sebesar 31,74% dengan kandungan metabolit sekunder seperti flavonoid, fenolik, alkaloid, saponin dan triterpenoid. Hasil analisis UPLCMS/MS ekstrak etanol biji B. macrophylla mengandung senyawa asam 3,4-dihidroksimandelat, larisitrin dan L-(-)-fenilalanin serta dapat menginhibisi enzim α-glukosidase dengan nilai IC50 sebesar 22,5627 µg/mL. Secara in silico senyawa L-(-)-fenilalanin dan larisitrin memiliki nilai energi bebas dan Konstanta inhibisi terbaik pada inhibisi enzim α-glukosidase (PDB ID: 3L4Y). Studi in vivo ekstrak etanol biji B. macrophylla dapat menurunkan kadar gula darah pada mencit Mus muscullus yang diinduksi aloksan sebesar 63,0 % pada dosis 500 mg/kg BB. Senyawa golongan fenolik dan flavonoid diduga berperan dalam menginhibisi enzim α-glukosidase secara in vitro dan in silico serta dalam menurunkan kadar gula darah mecit.
Co-Authors Ayu Febi Lestari Ayu Sunayah Dimas Danang Indriatmoko Eneng Elda Ernawati hasanah hasanah Lia Permatasari Muhammad Ihda Hamlu Liwatu Zein Nuzulia Romadlotun Nikmah Siti Nurbayti Siti Sawalia Swastika Oktavia Tarso Rudiana, Tarso