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Hutauruk, Rico Halim
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Health Professions Medicine & Pharmacology Nursing Public Health

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Antioxidant test of crude extract of secondary metabolites from Fusarium sp. isolate of rizosphere of cat’s whisker Piska, Finna; Zega, Sati Angriani; Hutauruk, Rico Halim; Septia, Evianti Dwi; Meutia, Rena
Jurnal Prima Medika Sains Vol. 6 No. 2 (2024): December
Publisher : Program Studi Magister Kesehatan Masyarakat Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/jpms.v6i2.5344

Abstract

Antioxidants are compounds needed in the prevention and therapy of diseases such as diabetes mellitus, cancer and premature aging. Over time, secondary metabolite compounds as antioxidants can be obtained from microbes, namely those originating from the endophyte and rhizosphere of plants. Based on previous research, secondary metabolites that act as antioxidants are flavonoids and phenolics, with phenolic compounds and flavonoids can bind free radicals through hydroxyl groups present in their aromatic rings. Microbes that live on medicinal plants will have similarities in producing secondary metabolites which can also be used as medicine. Fusarium sp. Laboratorium Basic Science UNPRI (LBSU) isolate is an isolate isolated from the rhizosphere of the cat's whisker plant (Orthosiphon stamineus). The cat's whisker plant is known to be an antioxidant. This study aims to test the antioxidant crude extract of secondary metabolites from Fusarium sp. LBSU. The method for isolating secondary metabolites is by liquid fermentation, then extracted using ethyl acetate and tested for antioxidant activity using the 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. The antioxidant test results were obtained from the DPPH radical inhibition value by Ethyl acetate Extract of Fusarium sp. LBSU (EEF) is 44%, while Vitamin C is 88%. Thus, the ability to capture DPPH free radicals by EEF is 44%, weaker than Vitamin C.
Antibacterial test of secondary metabolites of Rhizosphere bacterial isolates of cat whisker against Escherichia coli and Staphylococcus aureus Septia, Evianti Dwi; Hutauruk, Rico Halim; Razoki, Razoki; Piska, Finna
Jurnal Prima Medika Sains Vol. 6 No. 2 (2024): December
Publisher : Program Studi Magister Kesehatan Masyarakat Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/jpms.v6i2.5544

Abstract

The rhizosphere is the zone between the root surface and soil. Rhizosphere bacteria can produce metabolites that are antibacterial because they produce phytotherapeutic compounds that have the same properties as those produced by the plant. The purpose of this study was to isolate secondary metabolite compounds from the rhizosphere bacteria of cats’ whisker plants (Orthosiphon stamineus) as antibacterial agents against Escherichia coli and Staphylococcus aureus. This study began with the isolation of rhizosphere bacteria, purification, bacterial characterization, bacterial fermentation, and antibacterial tests. The results of the isolation of Orthosiphon stamineus rhizosphere bacteria obtained as many as six isolates, with each isolate coded as RKK-1, RKK-2, RKK-3, RKK-4, RKK-5, and RKK-6. The results showed that RKK-5 had an inhibition zone against Escherichia coli with a diameter of 8.5 mm. Based on these results, it can be concluded that RKK-5 has a moderate response to Escherichia coli.
Co-Authors Meutia, Rena Piska, Finna Razoki, Razoki Septia, Evianti Dwi Zega, Sati Angriani