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Synthesis of Nano Silver using Bioreductor of Tristaniopsis merguensis Leaf Extracts and Its Antibacterial Activity Test Verry Andre Fabiani; Megawati Ayu Putri; Marhan Ebit Saputra; Della Puspita Indriyani
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 4, No 3 (2019): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (650.622 KB) | DOI: 10.20961/jkpk.v4i3.34617

Abstract

Synthesis nanosilver from pelawan leaf extract (Tristaniopsis merguensis) has been carried out. The variables of this study were variations in the concentration of AgNO3 1 mM, 1.5 mM and 2 mM. Pelawan leaf extract acted as a bioreductor that converts Ag+ to Ag0. The synthesis was carried out in a ratio of 1: 4 (opposition leaf extract: AgNO3 solution) at 70 °C for 1.5 hours. The results of the UV-Vis analysis showed the maximum at the 1 mM; 1.5 mM; 2 mM AgNO3 concentration were 391 nm, 392 nm and 400 nm, respectively. XRD analysis explained that the resulting nanosilver was crystalline and according the Scherrer equation an average particle size was of 22.8 nm. The antibacterial activity test of nanosilver was carried out by disc method, nanosilver showed the existence of strong antibacterial activity against E. coli and S. aureus bacteria..
Effect of Sintering Temperature on Crystal Structure and Conductivity of the CaCO3-Doped Li4Ti5O12 Anodes from Blood Clam Shells (Anadara granosa) Marhan Ebit Saputra; Megawati Ayu Putri; Eka Febrianti; Widodo Budi Kurniawan
Indonesian Review of Physics Vol. 5 No. 1 (2022)
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/irip.v5i1.4804

Abstract

CaCO3-doped Li4Ti5O12 was synthesized by solid-state method with sintering temperatures at 750 °C, 800 °C, and 850 °C. The source of CaCO3 was used from blood clam shells (Anadara granosa) with a content of 97.67%. The influence of sintering temperature on crystal structure and conductivity of CaCO3-doped Li4Ti5O12 are extensively studied. XRD results show there is no CaCO3 phase found, which indicates that the doping of Li4Ti5O12 with CaCO3 has been successful. The smallest crystallite size was obtained at a sintering temperature of 800 °C, which is 46.49 nm, which is beneficial for shortening diffusion length and facilitating the electron and ion transport, causing an increase in anode conductivity. The most optimal conductivity was obtained in samples with a sintering temperature of 800 °C with a conductivity of 2.46 x 10-4 S/cm. When the sintering temperature is increased to 850 °C, the particles tend to agglomerate and deteriorate the electrochemical properties.
Hand Sanitizer Ekstrak Daun Pucuk Idat (Cratoxylum glaucum) sebagai Antibakteri Staphylococcus aureus dan Escherichia coli Megawati Ayu Putri; Marhan Ebit Saputra; Ike Nur Amanah; Siska Musiam; Verry Andre Fabiani
ALCHEMY Jurnal Penelitian Kimia Vol 16, No 2 (2020): September
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.16.2.32208.227-231

Abstract

Daun pucuk idat merupakan tanaman lokal Bangka Belitung yang memiliki aktivitas antibakteri terhadap Staphylococcus aureus dan Escherichia coli.Sebagai upaya pemanfaatan potensi lokal maka dibuat suatu produk sediaan gel hand sanitizer yang praktis dan ekonomis. Ekstrak daun pucuk idat diperoleh dengan metode maserasi menggunakan pelarut aseton. Ekstrak yang dihasilkan diformulasikan dalam berbagai konsentrasi ekstrak daun pucuk idat (40%, 60%, 80%, dan 100%) dengan penambahan carboxymethyl cellulose sodium (CMC-Na) 0,25 g, gliserin 1 mL, propilenglikol 0,5 mL serta akuades        10 mL. Setiap formulasi gel handsanitizer dilakukan pengujian stabilitas fisik meliputi uji organoleptis, uji homogenitas, uji daya sebar, uji pH, uji iritasi kulit serta uji aktivitas antibakteri.  Hasil uji organoleptik menunjukkan bahwa semua konsentrasi hand sanitizer berbentuk gel, berwarna kuning muda, berbau dan homogen. Uji pH dan daya sebar gel hand sanitizer telah memenuhi ketentuan SNI No. 06-2588. Pengujian iritasi kulit tidak menimbulkan kemerahan, gatal-gatal dan tidak mengakibatkan kulit menjadi kasar pada punggung tangan sukarelawan. Berdasarkan uji sifat fisik gel hand sanitizer yang dihasilkan memiliki sifat fisik yang serupa dengan gel hand sanitizer komersial. Hasil uji antibakteri hand sanitizer ekstrak daun pucuk idat terhadap E. coli dengan konsentrasi ekstrak daun pucuk idat 40%, 60%, 80%, dan 100% diperoleh diameter zona hambat berturut-turut sebesar 11,5 mm, 17,4 mm, 19,3 mm dan 19,3 mm, sedangkan pada bakteri S. aureus diperoleh diameter zona hambat berturut-turut sebesar 17,1 mm, 24,2 mm, 27,4 mm, dan  18 mm. Hasil uji antibakteri menunjukkan bahwa sediaan gel hand sanitizer ekstrak aseton daun pucuk idat memiliki aktivitas antibakteri terhadap bakteri E. coli dan S. aureus.Hand Sanitizer of Leaves Extract of Cratoxylum glaucum as Antibacterial of Staphylococcus aureus and Escherichia coli. Cratoxylum glaucum leaves is local plants of Bangka Belitung which have antibacterial activity against S. aureus and E. coli. As an effort to explore local potential, a practical and economical gel hand sanitizer product was prepared. Cratoxylum glaucum leaves extract was obtained by maceration method using acetone. The extract was formulated in various concentrations of Cratoxylum glaucum leaf extract (40%, 60%, 80%, and 100%) with the addition of 0.25 g carboxymethyl cellulose sodium (CMC-Na), 1 mL glycerin, 0.5 mL propylene glycol and 10 mL distilled water. Each concentration of the hand sanitizer gel was tested for physical stability including organoleptic, homogenity, spreadability, pH, skin irritation and antibacterial activity test. The organoleptic test results showed that all concentrations of hand sanitizers formed gel with light yellow color, smelly odor and homogeneous form. The analysis of pH and spreadability of hand sanitizer gel has fulfilled SNI No. 06-2588. The skin irritation testing does not cause redness, itching, and rough skin on the back of volunteer hands. Based on the physical properties test, the resulting hand sanitizer gel has physical properties similar to commercial hand sanitizer gel. The results of the antibacterial test of hand sanitizer against E. coli with Cratoxylum glaucum leaf extract concentrations of 40%, 60%, 80%, and 100% obtained the diameter inhibitory zones of 11.5 mm, 17.4 mm, 19.3 mm, and 19.3 mm, respectively. Meanwhile, the results of the antibacterial test of hand sanitizer against S. aureus bacteria with concentration of 40%, 60%, 80%, and 100% shows that the inhibition zone diameters were 17.1 mm, 24.2 mm, 27.4 mm, and 18 mm, respectively. The antibacterial test results shows that the gel hand sanitizer prepared has antibacterial activity against E. coli and S. aureus bacteria.