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All Journal Jurnal Zarah BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Molekul: Jurnal Ilmiah Kimia Aceh International Journal of Science and Technology
Irfan Gustian
Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education

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Light-induced synthesis of micron-sized metallic silver in aqueous extract of Rivina humilis L. fruits and its interaction with Corptotermes curvignathus Salprima Yudha S; Aswin Falahudin; Morina Adfa; Irfan Gustian; Herlina Herlina
Molekul Vol 16, No 2 (2021)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (428.324 KB) | DOI: 10.20884/1.jm.2021.16.2.740

Abstract

The aqueous extract of Rivina humilis was suitable to reduce silver ions (Ag+) to form micron-sized metallic silver at room temperature and without any addition of external reducing agent or stabilizer compounds. The reduction process was assisted by light, indicated by the colour change of the reaction mixture and supported by the appearance of peak at 455 nm in spectrophotometric analysis when the reaction was carried out under room light. Based on transmission electron microscopy (TEM) analysis, the as-prepared metallic silver was in spherical form. The analysis results using particles size analyzer (PSA) show their particles distribution from micro to nano size (average size was 199 nm). The interaction behaviour of micron-sized metallic silver/extract solution with Corptotermes curvignathus termites shows that the silver gives small additional effects along with the activity of the extract.
Aktivitas Antibakteri Ekstrak Etanol Daun Tapak Kuda (Ipomoea pes-caprae (L.) R. Br.) terhadap Bakteri Staphylococcus epidermidis Sri Wahyu Kurnia Putri; Devi Nurhasana; Avidlyandi Avidlyandi; Irfan Gustian; Sipriyadi Sipriyadi; Morina Adfa
BIOEDUSAINS: Jurnal Pendidikan Biologi dan Sains Vol 4 No 2 (2021): BIOEDUSAINS:Jurnal Pendidikan Biologi dan Sains
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (219.754 KB) | DOI: 10.31539/bioedusains.v4i2.2864

Abstract

This study aimed to determine the antibacterial activity of the ethanol extract of the leaves of Tapak Kuda (Ipomoea pes-caprae) against Staphylococcus epidermidis. The method used was Kirby-Bauer for the antibacterial test with various concentrations of ethanolic extract of I. pes-caprae leaf extract: 5 mg/mL, 20 mg/mL, 35 mg/mL, and 50 mg/mL, with five replications. The antibiotic clindamycin was used as a positive control, while DMSO was a negative control. The results showed that after 24 hours of incubation, the zone of inhibition of bacterial growth was demonstrated by the experimental and the positive control groups, while the negative control did not show the zone of inhibition. The diameter of the largest inhibition zone (11.40 mm) was at a 50 mg/mL test concentration, which was indicated as a strong category. In conclusion, the ethanolic extract of the leaves of I. pes-caprae can inhibit the growth of S. epidermidis at all test concentrations. Keywords: Antibacterial, Ipomoea pes-caprae, Staphylococcus epidermidis
PENDEKATAN GREEN SYNTHESIS ZnAl2O4 MENGGUNAKAN EKSTRAK DAUN KUMIS KUCING (Orthosiphon aristatus) Eka Angasa; Irfan Gustian; Intan N.S. Napitupulu; Nancy Willian; Vivi Sisca
Jurnal Zarah Vol. 10 No. 1 (2022): Jurnal Zarah
Publisher : Jurnal Zarah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/zarah.v10i1.4405

Abstract

Telah dilakukan pendekatan green synthesis ZnAl2O4 menggunakan ekstrak daun kumis kucing (Orthosiphon aristatus). Penelitian ini bertujuan untuk mengetahui efek ekstrak daun kumis kucing terhadap kristalinitas, ukuran, dan morfologi ZnAl2O4 yang diperoleh.. Green synthesis ZnAl2O4 dilakukan dengan menggunakan variasi massa ekstrak, yaitu 8, 12, dan 20 g. Hasil penelitian menunjukkan bahwa ekstrak daun kumis kucing berpengaruh kuat terhadap kristalinitas, bentuk, dan ukuran ZnAl2O4 yang diperoleh. Berdasarkan hasil analisis XRD, kristalinitas ZnAl2O4 yang disintesis menggunakan ekstrak kumis kucing menunjukkan kristalinitas yang lebih baik dibandingkan tanpa ekstrak. Penggunaan ekstrak 12 gram menghasilkan ZnAl2O4 dengan kristalinitas paling baik. Hasil analisis SEM menunjukkan bentuk partikel yang dihasilkan tidak seragam dengan ukuran yang bervariasi. Hasil penelitian ini menegaskan bahwa ekstrak berperan kunci dalam pembentukan ZnAl2O4.
Preparation of Fe-intercalated Graphite Based on Coal Tailings, Dimensional Structure Irfan Gustian; Eka Angasa; Dwi Agustini; Evi Maryanti; Dyiah Fitriani
Aceh International Journal of Science and Technology Vol 4, No 3 (2015): December 2015
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (669.343 KB) | DOI: 10.13170/aijst.4.3.3017

Abstract

Intercalated graphite from coal tailings have been modified through the intercalation of iron. Coal tailings which is a byproduct of the destruction process and flakes washing results from mining coal. Intercalation of iron goal is to improve the physical properties of graphite and modifying sizes of crystal lattice structure with thermal method. Modification process begins with the carbonization of coal tailings at 500ºC and activated with phosphoric acid. Activation process has done by pyrolysis at 700ºC. The results of pyrolysis was soaked in mineral oil for 24 hours, then pyrolysis again with variations in temperature 800°C and 900ºC for 1 hour and subsequent intercalation iron at 1% and 2%. Material before activated, after activated, and the results of pyrolysis still indicates order nano: 29, 25 and 36 nm respectively. X-ray diffraction characterization results indicate that change in the structure, the sizes crystal lattice structure of the material The greater the concentration of iron was added, the resulting peak at 2θ = 33 and 35 also will be more sharply. The results of SEM showed different morphologies from each treatment.
Co-Authors Aswin Falahudin Avidlyandi Avidlyandi Devi Nurhasana Dwi Agustini Dyiah Fitriani Eka Angasa Evi Maryanti Herlina Herlina Intan N.S. Napitupulu Morina Adfa Nancy Willian SALPRIMA YUDHA S Sipriyadi Sri Wahyu Kurnia Putri Vivi Sisca