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Molekul: Jurnal Ilmiah Kimia
Published by Universitas Jenderal Soedirman
ISSN : 19079761     EISSN : 25030310     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
MOLEKUL is a peer-reviewed journal of chemistry published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Jenderal Soedirman University, Indonesia. Publishing frequency 2 issues per year, on May and November. This Journal encompasses all branches of chemistry and its sub-disciplines including Pharmaceutical, Biological activities of Synthetic Drugs, Environmental Chemistry, Biochemistry, Polymer Chemistry, Petroleum Chemistry, and Agricultural Chemistry.
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Articles 12 Documents
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Search results for , issue "Vol 15, No 3 (2020)" : 12 Documents clear
Antibacterial Activity of Essential Oil from Rosemytle Leaves (Rhodomyrtus tomentosa (Ait.) Hassk) Salni Salni; Hanifa Marisa
Molekul Vol 15, No 3 (2020)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.505 KB) | DOI: 10.20884/1.jm.2020.15.3.601

Abstract

Rosemytle leaves (Rhodomyrtus tomentosa (Ait.) Hassk) have been used by society to treat various diseases related to bacterial infections, such as dysentery and typhoid fever caused by Shigella dysenteriae and Salmonella typhi, respectively. This study aimed to evaluate the antibacterial activity of essential oils from rosemytle leaves against both bacterias. Extraction was performed with a macerating device using n-hexane, ethyl acetate, and ethanol extracts, sequentially. This study used the agar diffusion method to test the antibacterial activity applied to the essential oils with concentrations of 1000, 500, 250, 125, 62.5, and 31.25 μg/mL. The antibacterial test results showed that n-hexane and ethyl acetate extracts were active against both bacterias while ethanol extract was not. Then, isolates N1 and E1 were produced respectively from n-hexane extract and ethyl acetate extract. The MIC values of both N1 and E1 for S. dysenteriae, and S. typhi were the same, namely 125 μg/mL. Isolate N1 was an essential oil containing menthol (59.60%), caryophyllene (25.77%), and cubenol (14.63%) while isolate E1 was an essential oil containing (73.93%), pentanone (8.30%), alpha calacorene (7.58%), and calacorene (3.78%). Rosemytle leaves have the potential to be developed as a drug to treat dysentery and typhoid fever.
Photocatalytic removal of Cu (II) in an aquatic solution using TiO2-Chitosan Nanocomposites imelda Fajriati; Mudasir Mudasir; Endang Tri Wahyuni
Molekul Vol 15, No 3 (2020)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (556.5 KB) | DOI: 10.20884/1.jm.2020.15.3.670

Abstract

Photocatalytic removal of Cu(II) in aquatic solutions using TiO2-chitosan nanocomposite  had been studied. The photocatalytic process was carried out using a batch system in a closed reactor equipped with a UV lamp. The results show that the percentage of photocatalytic removal of Cu(II) by TiO2 – chitosan nanocomposite was higher than that TiO2 bulk catalyzing. Under solution containing 20 mg/L of Cu(II), pH 7, three hours of contact time, and employing 20 mg TiO2-chitosan nanocomposite, the Cu(II) removal was successfully done up to 94.55%. The maximum adsorption capacity and the highest kinetic constants were obtained under nanocomposite with the highest amount of chitosan (TiO2-chit 0.13) and nanocomposite containing the highest amount of TiO2 (TiO2-chit 1.3), respectively. The method offers high reusability up to three times with percentage more than 50% of Cu(II) removal. Keyword: Photocatalytic, Cu(II) removal, TiO2-chitosan nanocomposite

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