25,201,077 dokumen ditemukan
(Menampilkan 681-700 | Halaman 35 dari 1260054)
Urutkan
#
Judul
Penulis
Tahun
Akses
Jurnal Institusi
Copper and Cadmium Toxicity to Marine Phytoplankton, Chaetoceros gracilis and Isochrysis sp.
Indonesian Journal of Chemistry; Vol 15, No 2 (2015); 172-178
In Copper (Cu) based antifouling (AF) paints Cu was largely used as booster biocide after organotin was banned. Cu is micronutrient which is important in photosynthesis process because Cu is an essential metal as component of enzyme and electron tran...
Jurnal Institusi
Cadmium Adsorption on Chitosan/Chlorella Biomass Sorbent Prepared by Ionic-Imprinting Technique
Indonesian Journal of Chemistry; Vol 15, No 2 (2015); 163-171
Ionic-Imprinted Chitosan/Chlorella biomass sorbent (IICCb) has been synthesized for selective adsorption of Cd(II) adsorption. IICCb was prepared by coating Cd(II)-complexed-chitosan hydrogel on the biomass surface followed by cross-linking procedure...
Jurnal Institusi
Two Isophalerin Compounds from Ethyl Acetate of Leave and Fruit of Mahkota Dewa (Phaleria macrocarpa (Scheff.) Boerl.) and Its Antibacterial Activity
Indonesian Journal of Chemistry; Vol 15, No 2 (2015); 179-186
Mahkota dewa plant (Phaleria macrocarpa (Scheff.) Boerl.) which is belong to family of Thymelaeaceae is one of Indonesia's traditional medicines. The aim of this research is to isolate secondary metabolites from ethyl acetate extract of leave an...
Jurnal Institusi
The Isolation of Xanthones from Trunk Latex of Garcinia mangostana Linn. and Their Antimicrobial Activities
Indonesian Journal of Chemistry; Vol 15, No 2 (2015); 187-193
ɑ-Mangostin (1), β-mangostin (2) and gartanin (3) have been isolated from the trunk latex of Garcinia mangostana Linn. and investigated for their antimicrobial activities against Bacillus subtilis, Enterococcus faecalis, Micrococcus luteus, Salmone...
Jurnal Institusi
Synthesis, Characterization of Cellulose Modified with 2-Mercaptobenzothiazole and Its Adsorption To Cu(II) Ion in Aqueous Solution
Indonesian Journal of Chemistry; Vol 15, No 2 (2015); 194-200
The modification of cellulose with 2-mercaptobenzhotiazole (MBT) through grafting and impregnating methods has been done. Modified cellulose used as adsorbent for Cu(II) ion in aqueous solution. The aims of research were modification cellulose with 3...
Jurnal Institusi
Antibacterial Compounds from Red Seaweeds (Rhodophyta)
Indonesian Journal of Chemistry; Vol 15, No 2 (2015); 201-209
Seaweeds produce great variety of metabolites benefit for human. Red seaweeds (Rhodophyta) are well known as producer of phycocolloids such agar, agarose, carragenan and great variety of secondary metabolites. This review discusses the red algal seco...
Jurnal Institusi
Detection of Hg2+ Metal Ions Using Silver Nanoparticles Stabilized by Gelatin and Tween-20
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 1-8
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 twee...
Jurnal Institusi
Analytical Method Validation and Determination of Pyridoxine, Nicotinamide, and Caffeine in Energy Drinks Using Thin Layer Chromatography-Densitometry
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 9-15
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 6...
Jurnal Institusi
Synthesis and Characterization of Chitosan- Alginate for Controlled Release of Isoniazid Drug
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 16-21
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 pa...
Jurnal Institusi
Glucose Oxidase Immobilization on TMAH-Modified Bentonite
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 22-28
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 th...
Jurnal Institusi
Synthesis of Silver-Chitosan Nanocomposites Colloidal by Glucose as Reducing Agent
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 29-35
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 chitos...
Jurnal Institusi
Synthesis and Characterization of Titania-Rice Husk Silica Composites as Photocatalyst
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 36-42
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 tem...
Jurnal Institusi
Synthesis of Mn(II)-Loaded TixSi1-xO4 Composite Acting as a Visible-Light Driven Photocatalyst
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 43-49
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 cond...
Jurnal Institusi
Effect of Various Solvent on the Synthesis of NiO Nanopowders by Simple Sol-Gel Methods and Its Characterization
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 50-55
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...
Jurnal Institusi
Condensation of Indole with Isatin over AlCl3/Mesoporous Aluminosilicate
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 56-63
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 ...
Jurnal Institusi
Conversion of Cyclohexanone to Adipic Acid Catalyzed by Heteropoly Compounds
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 64-69
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....
Jurnal Institusi
Synthesis Methyl Nitrophenyl Acrylate and Cytotoxic Activity Test against P388 Leukemia Cells
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 70-76
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-ni...
Jurnal Institusi
Transformation of Eugenol and Safrole into Hydroxychavicol
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 77-85
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. Isol...
Jurnal Institusi
QSAR Analysis of Benzothiazole Derivatives of Antimalarial Compounds Based On AM1 Semi-Empirical Method
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 86-92
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 p...
Jurnal Institusi
Theoretical Study on Structure and Electronic Properties of 4H-Cyclopenta[2,1-b,3;4-b’]dithiopene S-oxide and Its CCl2 and CF2 Bridged Derivatives
Indonesian Journal of Chemistry; Vol 15, No 1 (2015); 93-100
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). ...