14 articles in this issue
Lilis Sulistiawaty,Sri Sugiarti,Noviyan Darmawan
Silver nanoparticles were synthesized by reduction method using glucose as reducing agent for precursor AgNO3. This research was aimed at comparing the stability and performance of silver nanoparticles with stabilizer gelatin (Gelatin-AgNPs) and tween-20 ... see more
Florentinus Dika Octa Riswanto,RR. Endang Lukitaningsih,Sudibyo Martono
Food supplement which contains vitamins and stimulants such as caffeine were classified as energy drink. TLC-densitometry method was chosen to determine the pyridoxine, nicotinamide, and caffeine in the energy drink sample. TLC plates of silica gel 60 F25... see more
Sari Edi Cahyaningrum,Nuniek Herdyastuti,Nur Qomariah
The aim of this research was to synthesize and characterize chitosan-calcium alginate as matrix isoniazid encapsulation to produce controlled release isoniazid drug. The microparticles were evaluated for surface morphology, functional groups, size particl... see more
Ruth Chrisnasari,Zerlina Gabriela Wuisan,Arief Budhyantoro,Restu Kartiko Widi
The influence of bentonite modification by tetramethyl ammonium hydroxide (TMAH) on its capability to immobilize glucose oxidase (GOX) was studied. Modification of bentonite was conducted by the adding of 0-5% (v/v) TMAH. The observed results show that th... see more
Endang Susilowati,Triyono Triyono,Sri Juari Santosa,Indriana Kartini
Silver-chitosan nanocomposites colloidal was successfully performed by chemical reduction method at room temperature using glucose as reducing agent, sodium hydroxide (NaOH) as accelerator reagent, silver nitrate (AgNO3) as metal precursor and chitosan as... see more
Posman Manurung,Rudy Situmeang,Ediman Ginting,Indra Pardede
This article describes the synthesis of titania-silica composites by a sol-gel method using a mixture of silica of rice husk and titanium butoxide sols. Microstructures were examined at calcination temperature in the range of 500 to 700 °C, with temperatu... see more
Misriyani Misriyani,Eko Sri Kunarti,Masahide Yasuda
The synthesis and characterization of Mn-loaded TixSi1-xO4 (x= 0.4-0.8) composites and a preliminary study of an activity testing their ability to work as photocatalysts for the degradation of methylene blue (MB) have been studied. Synthesis was conducted... see more
Sherly Kasuma Warda Ningsih
Synthesis of nickel oxide (NiO) with various solvents by simple sol-gel process has been done. NiO nanopowders were obtained by using nickel nitrate hexahydrate and sodium hydroxide 5 M were used as precursor and agent precipitator, respectively. The addi... see more
Tri Esti Purbaningtias,Didik Prasetyoko,Hasliza Bahruji,Yusuf Muhammad Zein,Sugeng Triwahyono,Arief Fadlan,Imroatul Qoniah
Aluminium chloride immobilized on mesoporous aluminosilicate was investigated as catalysts in the condensation of isatin with indole. AlCl3/mesoporous aluminosilicate (AlCl3/AM) catalysts were prepared by impregnation of 1, 5, 10 and 15 wt% AlCl3 on the s... see more
Aldes Lesbani,Fitriliana Fitriliana,Risfidian Mohadi
Conversion of cyclohexanone to adipic acid using hydrogen peroxide as green oxidant catalyzed by heteropoly compounds i.e. H5[a-BW12O40] H4[a-SiW12O40] and H4[a-PVMo11O40] has been carried out systematically in one pot synthesis under mild condition. The ... see more
Teni Ernawati,Zulfa Khoirunni’mah
Synthesis of methyl nitrophenyl acrylate via modification of methyl trans-cinnamate had been done to improve its biological activity. The reaction of methyl trans-cinnamate with nitrating agent gave methyl 3-(2-nitrophenyl)acrylate and methyl 3-(4-nitroph... see more
Budi Arifin,Dumas Flis Tang,Suminar Setiati Achmadi
Hydroxychavicol is found in betel leaf at low concentration and is reported to have antibacterial, anti-inflammatory, antioxidant, anticancer, and antimutagenic activities. This study aimed to synthesize hydroxychavicol from eugenol and safrole. Isolation... see more
Ruslin Hadanu,Salim Idris,I Wayan Sutapa
Quantitative Structure and Activity Relationship (QSAR) analysis of 13 benzothiazoles derivatives compound as antimalarial compounds have been performed using electronic descriptor of the atomic net charges (q), dipole moment (µ), ELUMO, EHOMO and polariz... see more
Banjo Semire,Olusegun Ayobami Odunola
Quantum chemical calculations using semi-empirical, ab initio, density functional theory (DFT) and Møller plesset (MP2) methods were performed on 4H-Cyclopenta[2,1-b,3;4-b’]dithiopene S-oxide derivatives (i.e. bridged dithiophene S-oxides, BTOs). The geom... see more