Open Access Original Research Article

Synthesis, Characterization and Antimicrobial Activity of Some New Heterocyclic Compounds Incorporating Pyridazine Moiety

Fekria M. A. Soliman, Nadia T. A. Dawoud, Nahed F. Abdel-Ghaffar, Marwa I. El-Guindy, Heba Naguib

Chemical Science International Journal, Page 1-14
DOI: 10.9734/ACSJ/2016/23961

A series of heterocyclic compounds incorporating pyridazine moiety (1-24) were synthesized and evaluated for antimicrobial activities Gram- positive bacteria, Gram- negative bacteria and Yeast. Compounds 2b, 2c, 6, 7 and 10 were tested under antimicrobial activities as MICS. The results illustrated that among the synthesized compounds as a lead compound with good antimicrobial activity.

Open Access Original Research Article

Evaluation of the Interaction of Micronized Salbutamol Sulphate Particles with a Polymer Surface

Raed A. Ghanem, Abdel-Aziz Matani

Chemical Science International Journal, Page 1-7
DOI: 10.9734/ACSJ/2016/24107

The interaction between micronized Salbutamol Sulphate molecules and the internal surface of the constant volume chamber of a Metered Dose Inhaler (MDI) were studied using Chromatographic methods, a Scanning Electron Microscope (SEM) and Spectroscopic methods. The extensive usage of the MDI to deliver the micronized Salbutamol Sulpate results in the systematic decrease of both the shot weight and the concentration of delivered drug, as the number of the actuations increases. Micronized Salbutamol Sulphate particles were attached onto the internal surface as single crystals and layers of the drug particles. Spectroscopic analysis of the attached particle confirms that it is Salbutamol Sulphate and that there are no new bands disappearing or arising as a result of the interaction between drug molecules and the internal surface, which indicates that this interaction is Physisorption.

Open Access Original Research Article

Effect of Synthetic Zeolite on Some Physical Characteristics and Research Octane Number of Final Product Gasoline Sample Produced from Khartoum Refinery in Sudan

Ali A. Jadallah, Mohamed Ezeldin

Chemical Science International Journal, Page 1-6
DOI: 10.9734/ACSJ/2016/22788

This research explored the effect of synthetic zeolite on pH, density, vapour pressure and Research Octane Number (RON) for gasoline final product, gasoline sample was taken from Khartoum refinery. The Used sample was tested according to American Society for Testing and Materials (ASTM) before and after blended with synthetic zeolite. Previously tetra ethyl lead (TEL) and tetra methyl lead (TML) have been used to improve the fuels octane number, but they have negative effects on the environment, and have been banned internationally. The (RON) of marked gasoline sample was recorded 90.7 before blended with zeolite. In order to enhance the RON of used gasoline synthetic zeolite was added to the gasoline with concentration (10% w/v). Octane number of blends was measured by Cooperative Fuels Research (CFR) engine. Some of the physical properties for final product gasoline after addition were improved into a limits assigned by ASTM and Khartoum Refinery (KR). (RON) was increased to 91.9 after adding synthetic zeolite.

Open Access Original Research Article

The Synthesis and Characterization of Nano Composites of CdO and Its Applications for the Treatment of Simulated Dye Wastewater

Atiya Firdous, Uzma Hameed

Chemical Science International Journal, Page 1-10
DOI: 10.9734/ACSJ/2016/23799

The current study emphasizes the fabrications of Cadmium Oxide by extremity up approach adopting co-precipitation procedure. The surface morphology of fabricated Nano composites cadmium oxide was analyzed by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microcopy (SEM) techniques.

The treatment of simulated dyes wastewater was carried out by adsorption method using CdO Nano composites. In addition Malachite Green Oxalate (MGO) was selected as a model replicated system of dye wastewater, to explore the potential practicability for the elimination of the toxic dye.  The adsorption experiments were heralded under the optimized conditions like adsorbent dosage, dye concentration and temperature. The acceptability of adsorption progression was estimated by proceeding adsorption models like Freundlich, Langmuir and D-R (Dubinin–Radushkevich). The values of R2 show that Freundlich model is the best fitted model. The thermodynamic study was conducted to determine the values of free energy (∆G°), entropy (∆S°) and enthalpy (∆H°) change of the system. Adsorption Kinetic was also studied by Boyd’s model. The results demonstrated that adsorption efficiency was found to be 93% for Cadmium Oxide- dye-Nano composites systems. The present model system can be employed on industrial scale as a single step process for the removal of dye pollutants and thus it could provide a new raised area for waste minimization.

Open Access Review Article

Surface Coatings on Steel Pipes Used in Oil and Gas Industries - A Review

Muhammad Mumtaz Mirza, Elansezhian Rasu, Anjali Desilva

Chemical Science International Journal, Page 1-23
DOI: 10.9734/ACSJ/2016/22790

This paper discusses the characteristics and classifications of different type of protective coatings being used in oil and gas industry. After a brief review of the fundamental aspects of organic and powder coatings, this paper discusses the investigation being done on the tribological and mechanical properties of electroless Ni–P (EN-P) composite coatings. The study covers its fundamental aspects, mechanical properties, applications and future trends. EN-P coating have found wide applications in aerospace, automobile, electrical and chemical industries but in the field of oil and gas pipelines, very little research has been done. Since EN-P coatings possess splendid tribological properties, technological advancement demands further improvement in newer variants of EN-P coatings like Ni–W–P, Ni–Cu–P, Ni–P–SiC, Ni–P–TiO2 and so on to find the optimum coating solutions in the field of oil and gas pipelines and its variants against corrosion.

Open Access Review Article

Development of the Titrimetric and Spectrophotometric Methods for Determination of the Oxygen Content in Superconducting Cuprates

S. Georgieva, T. Nedeltcheva, A. Stoyanova- Ivanova

Chemical Science International Journal, Page 1-15
DOI: 10.9734/ACSJ/2016/23949

This review article is concerned with the oxygen stoichiometry determination in YBa2Cu3Oy and REBa2Cu3Oy (RE = Er, Eu, Gd) superconductors. The nondestructive and destructive methods for the determination of the oxygen coefficient y (y = 6.5 + δ, δ is the non-stoichiometric oxygen coefficient) are described. The destructive methods as titrimetry and spectrophotometry are discussed in detail. The role of the reducing agent for Cu(III) ions from the superconductor sample is clarified. A number of new formulae for calculation δ- and y- coefficients of the oxygen are reviewed.

The advantages and disadvantages of the iodometric titrations and the spectrophotometric methods are given. Spectrophotometric methods without calibration of the analytical function and/or using small sample mass for analysis are preferable because: analysis with them is not expensive; the results are accurate; they can be applied to determine the oxygen stoichiometry of the superconducting thin film deposit into substrates. One of them has been developed and employed for the first time to determine the oxygen stoichiometry in Ca doped REBa2Cu3Oy high-Tc bulk materials.