Meistera chinensis merupakan generasi baru famili Zingiberaceae yang tumbuh di Sulawesi Tenggara. Ekstrak buah mengandung metabolit sekunder seperti flavonoid, terpenoid, alkaloid, steroid, dan tanin yang memiliki efektivitas sebagai antioksidan dan antibakteri. Namun, belum ada laporan tentang antibakteri pada bagian rimpang. Penelitian ini bertujuan untuk mengetahui kandungan metabolit sekunder dan aktivitas antibakteri ekstrak etanol rimpang M. chinensis. Serbuk kering rimpang M. chinensis diekstraksi dengan maserasi menggunakan pelarut etanol 96%. Ekstrak dipekatkan menggunakan rotary vacuum evaporator. Metode analisis aktivitas antibakteri menggunakan difusi agar dengan konsentrasi ekstrak 10%, 20%, 30%, dan kontrol positif (Ciprofloxacin 30µg) terhadap Staphylococcus aureus ACTT 25023 dan Escherichia coli ACTT 35218 selama 24 jam. Hasil penelitian menunjukkan bahwa ekstrak etanol rimpang M. chinensis mengandung flavonoid, saponin, alkaloid, steroid, dan fenol, Ekstrak terbukti menghambat pertumbuhan E. coli dengan diameter zona hambat rata-rata secara berturut-turut pada konsentrasi 10%, 20%, dan 30% sebesar 6,08±1,79; 8,16±0,11 dan 10,57±1,34 mm. Pada S. aureus, zona hambat masing-masing konsentrasi 10%, 20%, dan 30% sebesar 5,02±0,79; 6,01±0,69; 8,03±0,76. Analisis One Way ANOVA menunjukkan perbedaan aktivitas antibakteri yang signifikan antar konsentrasi ekstrak pada E. coli dan S. aureus. Dapat disimpulkan rimpang M. chinensis memiliki aktivitas sebagai antibakteri.
Southeast Sulawesi is one area that has a diversity of potential marine biota as medicinal ingredients, including the sea urchin gonads. Empirically coastal communities have been hereditary, consuming sea urchin gonads as a source of high protein. Considering its potential as a raw material for medicines, it is necessary to conduct a series of tests to guarantee its safety and efficacy. This study aims to determine the chemical compounds of sea urchin gonad extract (Diadema setosum L) by Thin-Layer Chromatography (TLC). The research method uses a Pre-experimental design with a one-shot case study model. Identification of metabolites of sea urchin gonad extracts was carried out in two stages: phytochemical screening and identification by TLC method by UV-Vis. Samples were dried by the Freeze-drying method to get 335.11 g of dry samples and 58.06 g of extracts. The results of the test of the content of water-soluble and ethanol-soluble sea urchin extract were 5.73% and 3.72%. The results showed that in phytochemical screening, ethyl acetate extracts of the positive marine gonads contained alkaloids, saponins, and steroids. In addition, UV-vis 254 nm and 366 nm TLC methods showed alkaloids and saponins. The Rf values are 0.4 and 0.68, respectively.
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