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All Journal E-Jurnal Medika Udayana Biotropika Biology, Medicine, & Natural Product Chemistry Jurnal Penelitian Pendidikan IPA (JPPIPA) Meditory : The Journal of Medical Laboratory Warmadewa Minesterium Medical Journal Community Services Journal (CSJ) Journal of Clinical Microbiology and Infectious Diseases
Indraningrat, Anak Agung Gede
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Health Professions Immunology & microbiology Library & Information Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Public Health Social Sciences

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Antibacterial Activity Screening of Bacillus sp. AM12 Associated with Mangrove Soil Natania, Evellyne; Indraningrat, Anak Agung Gede; Widhidewi, Ni Wayan
Biology, Medicine, & Natural Product Chemistry Vol 13, No 2 (2024)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2024.132.373-379

Abstract

The use of synthetic antibiotics to treat bacterial infections can trigger resistance of pathogenic bacteria to antibiotics. One effort to overcome this is to explore microorganisms that produce antibacterial compounds from nature. A previous study reported isolates of Bacillus sp. AM12 from mangrove soil displayed antibacterial potential based on preliminary screening of the perpendicular streak test. This study was designed to confirm the antibacterial potential of Bacillus sp. AM12 uses chemical solvent extraction. Bacillus sp. AM12 was fermented in 100 mL liquid ISP-2 sterile and shaken at 150 rpm for 7 days. The supernatant was filtered from the cell mass using Whatman paper and extracted using 100 mL of ethyl acetate solvent (1:1, v/v) twice. The filtrate was evaporated at 40ºC until a thick, clear yellowish colored extract was obtained. The thick extract was tested for antibacterial activity using the Kirby-Bauer method against two Gram positive and two Gram negative bacterial targets. Antibacterial screening showed moderate diameter zone of inhibition of 6.72 ± 0.21 mm, 6.82 ± 0.15 mm, and 6.62 ± 0.21 mm against Staphylococcus aureus ATCC 25923, Streptococcus mutans FNCC 0405, and Klebsiella pneumoniae ATCC 70060, respectively. However, no antibacterial activity was observed against Escherichia coli ATCC 25922. Analysis of the chemical composition of ethyl acetate crude extracts using GC-MS has detected 10 different compounds, in which the 3 most dominant antibacterial compounds were Benzene, 1,2,4-Trimethyl-, Benzene, 1-ethyl-2-methyl- and 2-butoxyethyl acetate. In general, these results provide an initial description of Bacillus sp. AM12 is a potential of antibacterial producer.
Phytochemicals and Larvicidal Activity of Sonneratia alba Root Extracts from Ngurah Rai Mangrove Forest, Denpasar-Bali Wijaya, Made Dharmesti; Indraningrat, Anak Agung Gede; Kirtanayasa, I Gede Yoga Ayuning
Biology, Medicine, & Natural Product Chemistry Vol 12, No 2 (2023)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2023.122.499-505

Abstract

Dengue is an endemic disease with a high incidence in almost all Southeast Asian countries, including Indonesia. This infectious disease is caused by a virus transmitted by the bite of Aedes aegypti mosquito as the main vector. Effective mosquito vector control is a crucial step in stopping the spread of this virus. Of the several methods available, the use of larvicides is considered one of the most successful treatments in reducing the number of mosquito vectors. However, widely used synthetic larvicides can have undesirable side effects on the environment and non-target organisms including human health. The aim of this study was to discover a new biolarvicide from natural materials that is relatively safer. In this study, the biolarvicidal activity of mangrove plant species that are commonly found in Ngurah Rai Mangrove Forest Bali was tested, namely Sonneratia alba. Mangrove root simplicia was extracted by reflux method using three different solvents namely methanol, chloroform, and n-hexane. The content of compounds in the extract were analyzed using GC/MS method. The larvicidal activity of the extracts were tested on A. aegypti instar III/IV larvae with concentrations of 0.1, 1, 10, 100, and 1000 ppm for 24 hours. Subsequently, the average value of larval mortality was used to calculate the LC50 of each extract. The results showed that S. alba methanol extract provided the best larvicidal activity compared to chloroform and n-hexane extracts, with mortality of 69.33% at a concentration of 1000 ppm and LC50 of 1265 ppm. GC-MS analysis showed that the methanol extract of S. alba contained five dominant compounds namely Methyl 2-hydroxy-eicosanoate (19.55%); 4H-1-Benzopyran-4-one, 3,5-dihydroxy-2-(4-hydroxy-3-methoxyphenyl)-7-methoxy (16.48%); 4-((1E)-3-Hydroxy-1-propenyl)-2-methoxyphenol (10.06%); Benzamide, N-[4-(2-naphtyl)-2-thiazolyl]- (9.40%); and 2,3-Dihydro-3,5-bis(3-methoxyphenyl)-1H-inden-1-one (6.52%). The results of this study provide a preliminary result on larvicide activity from mangrove S. alba in order to develop bio larvicides from nature which is safer for human health and environment.
Phytochemical and Toxicity Analysis of Sonneratia alba Mangrove Leaf Extract using the Brine Shrimp Lethality Test (BSLT) Method Arta, Ni Kadek Dewi Asri Tiara; Indraningrat, Anak Agung Gede; Wijaya, Made Dharmesti
Biology, Medicine, & Natural Product Chemistry Vol 13, No 2 (2024)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2024.132.443-448

Abstract

Mangroves are plants that contain various secondary metabolites with various potential pharmacological activities, one of which is cytotoxic activity. However, researchers have not extensively explored the evidence of secondary metabolite compounds and their toxicity effects in mangrove plants. This research aims to determine the content of secondary metabolite compounds and the toxicity of the leaf extract of the Sonneratia alba mangrove plant in the Ngurah Rai Grand Forest Park (TAHURA), Bali. In this experimental research, compound extraction was carried out using a maceration technique for 2x24 hours using two types of solvents, namely methanol and n-hexane. Phytochemical tests were carried out using qualitative methods and gas chromatography-mass spectrometry (GC-MS), while the toxicity test used was the brine shrimp lethality test (BSLT) method. Potassium dichromate and sea water without extract were used as positive and negative controls, respectively. The LC50 value was calculated using probit analysis in Microsoft Excel. Phytochemical test results showed that the methanol extract contains phenol, saponin, tannin, and steroid compounds. Meanwhile, n-hexane extract only contains steroid compounds. GC-MS analysis showed that the compounds with the largest area percentages in the methanol and n-hexane extracts were 1,2,3-benzenetriol (3.94%) and n-hexadecenoic acid (2.41%), respectively. Based on the LC50 value, the methanol extract of S. alba mangrove leaves was moderately toxic (178.17 ppm), while the n-hexane extract was weakly toxic (567.23 ppm). The results of this study provide information that the type of chemical solvent has a major influence on the level of toxicity of S. alba leaf extract, with polar methanol solvent providing the highest toxicity effect compared to nonpolar n-hexane solvent.
Phytochemicals and Antibacterial Activity of Impatiens balsamina L. Leaf Extracts Against Gram-Positive and Gram-Negative Bacteria Fridayanthi, Putu Utari; Wijaya, Made Dharmesti; Udiyani, Desak Putu Citra; Indraningrat, Anak Agung Gede; Setiabudy, Marta
Biology, Medicine, & Natural Product Chemistry Vol 14, No 1 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.141.327-335

Abstract

The emergence of antibiotic resistance as one of the global public health threats makes research on new antibacterial compounds urgently needed. Among natural resources, the Impatiens balsamina plant has the potential to be explored as the new source of antibacterial agents. This study aimed to identify the phytochemical composition and evaluate the antibacterial activity of I. balsamina leaf extracts against Gram-positive and Gram-negative bacteria. Extracts were prepared using the maceration method with methanol, chloroform, and n-hexane solvents at a 1:5 sample-to-solvent ratio. Phytochemical screening was performed qualitatively, and antibacterial activity was evaluated using the disc diffusion assay. Analysis of methanol extract detected the presence of flavonoids, saponins, tannins, phenols, steroids, and glycosides, while chloroform extract consisted of tannins, phenols, and steroids. On the other hand, steroids were the only compounds detected qualitatively in n-hexane extract. Antibacterial testing revealed that methanol extract exhibited the highest activity, with zones of inhibition (ZOI) of 15.10±0.18 mm, 9.40±0.30 mm, 14.75±1.28 mm, and 8.67±0.50 mm against Streptococcus mutans FNCC 0405, Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, and Klebsiella pneumoniae ATCC 700603, respectively. A concentration-dependent ZOI was observed in the methanol extract, with activity increasing at higher concentrations. GC-MS analysis of the methanol extract identified 32 compounds, including n-hexadecanoic acid (12.12%), 2-acetylbenzoic acid (8.26%), 5-hydroxymethylfurfural (8.21%), and 2-methoxy-4-vinylphenol (4.67%), which are known to possess antimicrobial, antioxidant, and anti-inflammatory activities. Chloroform extract showed moderate activity against S. mutans (7.04±0.15 mm) and S. aureus (7.10±0.31 mm), while n-hexane extract exhibited no antibacterial activity. The significant antibacterial activity of methanol extract is likely due to its rich phytochemical composition, highlighting methanol as an effective solvent for extracting bioactive compounds. These findings provide a strong foundation for further exploration of I. balsamina leaf extracts as a source of antibacterial agents.
Co-Authors Adhiputra, I Ketut Agus Indra Anak Agung Sri Agung Aryastuti AR, Sunthio Barran Cia Arta, Ni Kadek Dewi Asri Tiara Choe, Daegeun Fridayanthi, Putu Utari Ida Ayu Agung Idawati Ida Bagus Gede Darmayasa Kadek Karang Agustina Kadek Lila Antara Kirtanayasa, I Gede Yoga Ayuning Made Dharmesti Wijaya Maheswari, Ida Ayu Kartika Natania, Evellyne Ni Nyoman Sri Budayanti Paramasatiari, Anak Agung Ayu Lila Prihantara, Komang Gede Yudha Purnami, Pande Putu Christine Putri Putri Herawati, Putri Putu Arya Suryanditha Setiabudy, Marta Udiyani, Desak Putu Citra Widhidewi, Ni Wayan Widowati, I Gusti Ayu Rai - Yanti, Ni Komang Semara