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The study investigated the antibacterial effects of white jasmine leaf extract (Jasminum sambac L.) on Propionibacterium acnes, the bacteria responsible for acne. Using a true experimental design, the research measured the inhibition zone diameters at various concentrations of the extract. Results showed that the inhibition zones varied with concentration: 25 μg/ml resulted in a 10.34 mm zone, 50 μg/ml in 2.36 mm, 100 μg/ml in 9.75 mm, 250 μg/ml in 8.14 mm, and 500 μg/ml in 10.95 mm. Clindamycin, a known antibiotic, produced a 28.55 mm inhibition zone, while the negative control with distilled water showed no inhibition. The findings suggested that white jasmine leaf extract had some antibacterial activity against P. acnes, though less effective than clindamycin, and could be used as a learning resource in biology education.

The study utilized Alternanthera sessilis aqueous extract to synthesize nickel oxide nanoparticles (NiONPs) through a simple and cost-effective biological method. The extract, known for its health benefits including promoting hair growth, served as a capping agent to prevent agglomeration. Characterization of NiONPs was performed using photoluminescence and UV-visible spectroscopy, confirming their formation. The nanoparticles demonstrated significant antimicrobial activity against Bacillus subtilis, antifungal activity against Candida albicans, and effective dye-reduction capabilities against Rhodamine B and Methylene Blue, highlighting their potential for various applications.