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All published articles 1056

Phytochemical Screening of Leaves of Catharanthus roseus (L.)

Amanda Furtado de Almeida, Ryan da Silva Ramos & Sheylla Susan Moreira da Silva de Almeid · Chemical Science International Journal · 2016

Aims: To determine the major classes of secondary metabolites found in the leaves of Catharanthus roseus (L.). Study Design: The study aimed to determine the major classes of secondary metabolites of plant species Catharanthus roseus through technical and classical methodologies....

Open access Research Article 10.9734/ACSJ/2016/19227

A Theoretical Study of the Enol Contents of Cyclohexanone, Cyclopentanone and Acetone

Ashraf M. Al-Msiedeen, Ghassab M. Al-Mazaideh & Salim M. Khalil · Chemical Science International Journal · 2016

PM3 and DFT calculations have been performed with complete optimization of geometries on cyclohexanone, cyclopentanone, and acetone. The enol content trend determined in this work was cyclohexanone > cyclopentanone > acetone, which was found to agree with published experime...

Open access Research Article 10.9734/ACSJ/2016/25048

Adsorption, Thermodynamics and Kinetics of Methylene Blue on Nano Structured ZnO Crystals

Ismail K. Al-Khateeb & Muna S. Mahmood · Chemical Science International Journal · 2016

This investigation was concern to study the removal of methylene blue pollutants from aqueous solution using nano ZnO synthesized from raw materials of zinc oxide. The equilibrium adsorption data were analyzed using adsorption models of Langmuir, Freundlich and Temkin. The thermo...

Open access Research Article 10.9734/ACSJ/2016/25000

Chemical Constituents and Antimicrobial Activity of the Leaf Essential Oil of Garcinia kola Heckel (Clusiaceae) from Nigeria

Samuel Ehiabhi Okhale, Chukkol Ismail Buba, Peters Oladosu, Henry O. Egharevba, Grace Ugbabe, Jemilat A. Ibrahim & Oluyemisi Folashade Kunle · Chemical Science International Journal · 2016

All parts of Garcinia kola are used in traditional medicine for various ailments including inflammation and infections. The leaf essential oil (EO) of Garcinia kola was isolated by hydrodistillation using Clavenger type apparatus and subjected to GC-MS analyses. A total of twenty...

Open access Research Article 10.9734/ACSJ/2016/24019

Stagnation Point Flow of a Williamson Fluid over a Nonlinearly Stretching Sheet with Thermal Radiation

M. Monica, J. Sucharitha & Ch. Kishore Kumar · Chemical Science International Journal · 2016

The present analysis deals with the study of stagnation point flow of a Williamson fluid over a nonlinearly stretching sheet with thermal radiation. The partial differential equations governing this phenomenon were transformed into coupled nonlinear ordinary differential equation...

Open access Research Article 10.9734/ACSJ/2016/25144

Single Crystal XRD, Bioevaluation and DFT Analysis of 4-Phenylsulfanylbutyric Acid (4PSBA) and Its Cocrystal with 2-Amino-5-nitropyridine (2A5NP)

V. Velmurugan, P. Palanisamy, R. Subramanian, N. Bhuvanesh, S. Gomathi, P. Thomas Muthiah, B. Ravindran Durai Nayagam & S. Kumaresan · Chemical Science International Journal · 2016

The crystal structures of 4-phenylsulfanylbutyric acid (4PSBA) and its cocrystal with 2-amino-5-nitropyridine (2A5NP) have been studied. Both 4PSBA and its co-crystal, 4PSBA:2A5NP belong to the triclinic crystallographic system with the same space group P-1. Theoretical energy ca...

Open access Research Article 10.9734/ACSJ/2016/25166

One-pot Synthesis of 1H-benzo[f]chromen-2-yl (phenyl)methanone Derivatives in the Presence of Copper Triflate as Catalyst Using Ultrasonic Irradiation

Tamrat Yimenu Zeleke, Kadir Turhan & Zuhal Turgut · Chemical Science International Journal · 2016

A rapid, efficient and environment-friendly protocol for the synthesis of naphthopyranes has been developed by one-pot condensation of 2-naphthol, various aromatic aldehydes and benzoylacetone or 1,3-diphenyl-1,3-propandione in the presence of Cu(OTf)2 as catalyst under ultrasoni...

Open access Research Article 10.9734/ACSJ/2016/24655

Micro, Sono, Photocatalytic Degradation of Eosin B Using Ferric Oxide Doped with Cobalt

Abeer Sharfalddin, Eman Alzahrani & Mohamad Alamoudi · Chemical Science International Journal · 2016

Eosin B dye is usually used for staining in biology; the stain is harmful if swallowed, smelt, or absorbed through skin. Some researchers have tried to remove it by adsorption, but few have attempted for a complete degradation. In this study, cobalt doped iron oxide (Co-Fe2O3) po...

Open access Research Article 10.9734/ACSJ/2016/23648

Effect of Sodium Hydroxide Thickener on Grease Production

K. Ebisike, B. E. Attah Daniel, M. N. Anakaa, H. M. Kefas & S. O. O. Olusunle · Chemical Science International Journal · 2016

Sodium hydroxide (NaOH) was used to produce grease from spent engine oil. A study of the unworked penetration, viscosity, and dropping point of the grease were analyzed under different temperature ranges, from 30°C to 60°C. The grease produced was of Brown colour on physical obse...

Open access Research Article 10.9734/ACSJ/2016/20624

Phytochemical Screening and Antimicrobial Activity of Ficus sycomorus Extracts of the Stem Bark and Leaves on Some Pathogenic Microorganisms

Adamu Suleiman Ahmad, Abdulhamid Dahiru, Abba Tijjani Muhammad, Hamza Idris & Kamlish Gautam · Chemical Science International Journal · 2016

The preliminary of Phytochemical screening of methanol and ethanol extracts for both the stem-bark and leaves of Ficus sycomorous revealed the presence of flavonoids, glycosides, reducing sugar, resins, tannins and saponins. The result of anti-microbial activity indicates that et...

Open access Research Article 10.9734/ACSJ/2016/23654

Geometric and Electronic Structure of Papaverine and Its Acid Strength

V. A. Babkin, V. Yu Dmitriev, D. S. Andreev, L. M. Lisina, A. I. Rakhimov, N. A. Rakhimova, V. S. Belousova, O. A. Ponomarev, G. E. Zaikov & O. V. Stoyanov · Chemical Science International Journal · 2016

For the first time ever, the quantum-chemical calculation of papaverine molecule was performed within the framework of molecular model by methods RHF/6-311G** and DFT-PBE0/6-311G**. Optimized geometric and electronic structure of this compound was obtained. Its acid strength was...

Open access Research Article 10.9734/ACSJ/2016/22405

Determination of Nitrate and Nitrite Contents of Some Edible Vegetables in Guyuk Local Government Area of Adamawa State, Nigeria

Priscilla Alexander, Philemon Handawa & Umoru Titus Charles · Chemical Science International Journal · 2016

Based on research founding’s nitrite and nitrate has been discovered as pro-drugs of the vasorelaxant nitric oxide, however many studies have reported that intake of these ions either intravenously or as a food supplements enhanced athletic performance. One of the factors and maj...

Open access Research Article 10.9734/ACSJ/2016/23387

Size Effects of Silver Nanoparticles on the Photovoltaic Performance of Dye Sensitized Solar Cells

M. Y. Onimisi, Eli Danladi, S. G. Abdu, H. O. Aboh & Ezeoke Jonathan · Chemical Science International Journal · 2016

Solar Cells The size effects of silver (Ag) nanoparticles (NPs) on the performance of a dye sensitized solar cells (DSSCs) through successive ion layer adsorption and reaction (SILAR) was investigated. A series of AgNPs with different SILAR cycles were synthesized on fluorine tin...

Open access Research Article 10.9734/ACSJ/2016/24525

Densiometric Study of Chloroquine Diphosphate in Aqueous Solution of Acetic Acid at 293.15K

Monalisa Das, Sunil Kumar Pradhan, Smrutiprava Das & Ajaya Kumar Patnaik · Chemical Science International Journal · 2016

The apparent molar volume , limiting apparent molar volume  and solute-solute interaction parameter ( ) of chloroquine diphosphate in aqueous solution of acetic acid at 293.15K were calculated. The apparent molar volumes had been computed to calculate the partial molar volumes of...

Open access Research Article 10.9734/ACSJ/2016/24038