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Savitri, Evika
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology

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Flavonoids and Antioxidant Activities of Silver Nanoparticles of Extract Galaxaura rugosa Savitri, Evika; Bahari, Mohamad Fajar; Minarno, Eko Budi; Shinta
Biota Vol 11 No 1 (2025): Jurna Biota 2025
Publisher : Faculty of Science and Technology Universitas Islam Negeri Raden Fatah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/biota.v11i1.22946

Abstract

Algae Galaxaura rugosa contains phenolic compounds, flavonoids, β-carotene, and galactane sulfate, which are natural antioxidants. The development of antioxidants of red algae into silver nanoparticles (AgNPs) can improve their effectiveness in preventing ROS. The objective of this study is to synthesize silver nanoparticles using G. rugosa algae as well as to test the total flavonoid levels and antioxidant activity of G. rugosa silver nanoparticles. The method of research for synthesis silvernanoparticles using extract G. rugosa as a bioreductor. Characterization of silver nanoparticle G. rugosa using Particle Size Analysis (PSA) and UV-Vis Spectrophotometer. The total flavonoid and antioxidant activities of silver nanoparticles using UV- VIS spectrophotometer. The test of antioxidant activity using the DPPH method. The research results showed that silver nanoparticles using G. rugosa resulted in a color change of the soluble from green to yellow.  The UV- VIS spectrophotometer measurement in the 570-580 nm wave range with a maximum wavelength of 406 nm. The measurement of the size distribution of the nanoparticles formed using PSA is an average of 11 nm. Total flavonoid silver nanoparticles of G. rugosa value of 36.21±0.65 mgQE/g higher than extract value of 32,12±0,79 mgQE/g. The antioxidant activity of IC50 of silver nanoparticle G. rugosa value of 26.658 ±1.44 ppm is very strong and the extract value of 46,128 ± 1.6 is strong category.
Co-Authors Bahari, Mohamad Fajar Eko Budi Minarno Shinta