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All Journal Indonesian Journal of Chemistry Annales Bogorienses
Maryani, Faiza
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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Synthesis, Characterization, and Antibacterial Activity of Plant-Derived Zinc Oxide Nanostructure Using Lavandula angustifolia and Phyllanthus niruri Extracts Fakhirah, Dhiya; Magfira, Tya Aisha; Hutama, Aulia Sukma; Septama, Abdi Wira; Maryani, Faiza; Krismastuti, Fransiska Sri Herwahyu
Indonesian Journal of Chemistry Vol 24, No 3 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.93293

Abstract

In recent years, green synthesized nanomaterials have garnered wide interest due to its inherent features like rapidity, cost-effectiveness, and environmentally friendly technique. The green synthesis of Zinc oxide nanostructures (n-ZnO) using two kinds of plant extract, lavender (Lavandula angustifolia) and meniran (Phyllanthus niruri), were discussed and their antibacterial activities were compared. Characterization by means of X-ray diffraction (XRD), Fourier transform infrared (FTIR), and field emission-scanning electron microscopy/energy dispersive X-ray spectroscopy (FE-SEM/EDS) were used to confirm the successful formation of n-ZnO using both plant extracts. The antibacterial activity of the n-ZnO synthesized from two different plant extracts was tested against Klebsiella pneumoniae and methicillin-resistant Staphylococcus aureus (MRSA). The results show that both n-ZnO has antibacterial activity against MRSA. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values for n-ZnO synthesized from meniran extract were 78 and 156 mg/mL, respectively, while MIC and MBC values for n-ZnO synthesized from lavender extract were 156 and 312 mg/mL, respectively. These results confirm that the n-ZnO prepared from meniran extract is more effective in inhibiting MRSA than the n-ZnO prepared from lavender extract. This study proves that plant-based n-ZnO has anti-microbial activities and may serve as antimicrobial therapeutics.
Bioactivities Screening of Indonesian Marine Bacteria Isolated from Sponges Artanti, Nina; Maryani, Faiza; Mulyani, Hanny; Dewi, Rizna Triana; Saraswati, Vienna; Murniasih, Tutik
Annales Bogorienses Vol. 20 No. 1 (2016): Annales Bogorienses
Publisher : BRIN

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Abstract

Currently marine bacteria are considered as important source of natural products for drug discovery. The objective of this study is to conduct an in vitro bioactivities (antidiabetic, antioxidant and antibacterial) screening of 9 Indonesian marine bacteria isolated from sponges that belongs to the Research Center for Oceanography, Indonesian Institute of Sciences collections. The marine bacteria were cultured for 2 days in liquid medium containing yeast, peptone and sea salt under shaking condition and extracted with ethyl acetate. Antidiabetic was measured using inhibition of -glucosidase inhibitory activity method; antioxidant was measured using DPPH free radical scavenging activity method; antibacterial was tested using disc diffusion method. Screening results showed that at sample concentration of 200 μg/mL, there was significant -glucosidase inhibitory activity detected in the extracts of strain Sp 7.9 (84 % inhibition) and Sp 8.10 (75 % inhibition), however the antioxidant activities of these two strains were low only around 30 % inhibition, antioxidant activities of other strains were very low. Screening for antibacterial activities using 10 μL samples show that extract of strain Sp 8.5 was best for Staphylococcus aureus (14 mm inhibition); Sp 7.9, and Sp 8.5 for Bacillus subtilis (18 mm inhibition); Sp 8.10 for Escherichia coli (10 mm inhibition); Sp 8.9 and Sp 8.10 (10 mm inhibition) for Pseudomonas aeuriginosa. Based on these results marine bacteria strain Sp 7.9 and Sp 8.10 were selected to be used for further studies in the isolation of bioactive that has potential as antidiabetic and antibacterial. Results of molecular identification conducted by InaCC show that identity of both strains based on BLAST Homology using NCBI database were Bacillus thuringiensis.
Co-Authors Abdi Wira Septama Fakhirah, Dhiya Hutama, Aulia Sukma Krismastuti, Fransiska Sri Herwahyu Magfira, Tya Aisha Mulyani, Hanny Nina Artanti Rizna Triana Dewi Saraswati, Vienna Tutik Murniasih