Volume 8, Issue 4 (2011) | American Journal of Applied Sciences

Synthesis and Calcium Channel Blocking Activity of 1, 4-Dihydropyridine Derivatives Containing Ester Substitute and Phenyl Carbamoyl Group

Bassem Sadek — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.303.309

Problem statement: Several studies on the synthesis of new nifedipine analogs have been carried out, but the literature reveled that no study on the synthesis and calcium channel blocking activity of...

Synthesis, Characterization and Biological Activities of Organotin (IV) Methylcyclohexyldithiocarbamate Compounds

Normah Awang — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.310.317

Problem statement: The growing interest in the chemistry of sulphur donor ligands are due to their encouraging anticancer, antibacterial and antifungal activities as well as their widespread industr...

Utilization of Bone Adhesive to Produce Particleboards from Stems of Cotton Plant at the Pressing Temperature of 140°C

Komi Kadja — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.318.322

Problem statement: To value agricultural residues, a study was carried out to investigate mechanical and physical properties of particleboards produced from stems of cotton (Gossypium hirsutum L.) b...

Using Orthosiphon stamineus B. for Phytoremediation of Heavy Metals in Soils Amended with Sewage Sludge

Arifin Abdu — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.323.331

Problem statement: Phytoremediation is a biological treatment where plants are used to remove pollutants from the environment to make them harmless. A study was conducted in a greenhouse at the Facu...

A New Robust Hybrid Approach to Enhance Speech in Mobile Communication Systems

Manimegalai Govindan Sumithra — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.332.342

Problem statement: The received voice signal in mobile communication is often disturbed by background noise and hence there is a need for good noise reduction methods for enhancing Speech. It is wel...

A Conceptual Model of Knowledge Sharing and Market Orientation in the Tourism Sector

Chien Mu Yeh — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.343.347

Problem statement: Marketing scholars have emphasized the importance of market orientation. While a number of studies discover the positive influence of market orientation on a variety of organizati...

Experimental Investigation on Performance and Emission Characteristics of Low Heat Rejection Diesel Engine with Ethanol as Fuel

P. Lawrence — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.348.354

Problem statement: Depleting petroleum reserves on the earth and increasing concerns about the environment leads to the question for fuels which are eco-friendly safer for human beings. The objectiv...

Coordination of Series and Shunt Flexible Alternating Current Transmission Line System Devices Based Thyristor Controller for Improving Power System Stability

Prechanon Kumkratug — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.355.358

Problem statement: Thyristor Controlled Series Capacitor (TCSC) and Static Var Compensator (SVC) have been individually applied to improve stability of power system. Approach: This study presents th...

Influence of Triethanolamine on the Chemical Bath Deposited NiS Thin Films

Anuar Kassim — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.359.361

Problem statement: Recently, many scientists looking for new chalcogenide materials for the solar cell applications. Nowadays, silicon-based solar cell became dominant products in the market. Becaus...

Evaluation of a Dual-Purpose Chemical Applicator for Paddy Fields

Mohammed Shu’aibu Abubakar — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.362.367

Problem statement: One of the major problems of rice production is the shortage of labor resulting from migration from rural to urban areas, making it very difficult to meet peak demands for paddy p...

An Enhancement of Bayesian Inference Network for Ligand-Based Virtual Screening using Features Selection

Ali Ahmed — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.368.373

Problem statement: Similarity based Virtual Screening (VS) deals with a large amount of data containing irrelevant and/or redundant fragments or features. Recent use of Bayesian network as an altern...

Particle Swarm Optimization Approach for Optimal Design of Switched Reluctance Machine

Mahadevan Balaji — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.374.381

Problem statement: Switched Reluctance Motors (SRMs) are widely used in various applications due to their inherent simplicity and rugged construction In SRM, torque output and torque ripple are sens...

Implementation Weather-Type Models of Capacitated Arc Routing Problem via Heuristics

Zuhaimy Ismail — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.382.392

Problem statement: In this study, we introduced a new and real-life condition of Capacitated Arc Routing Problem (CARP), a model that represents vehicle’s operation in waste collection. In general...

On the Influence of Stator Slot shape on the Energy Conservation Associated with the Submersible Induction Motors

M. Sundaram — 2011-04-18

American Journal of Applied Sciences, Published online: 18 April 2011; doi:10.3844/ajassp.2011.393.399

Problem statement: A good design of Submersible Induction Motor is required to maintain maximum efficiency level. This can be achieved in one way by optimum design of magnetic circuit. The magnetic ...

A Review of Static Tests and Recent Studies

Srilert Chotpantarat — 2011-04-19

American Journal of Applied Sciences, Published online: 19 April 2011; doi:10.3844/ajassp.2011.400.406

Problem statement: Acid mine drainage from waste rocks, tailings and other mine components, is one of the most important environmental concerns at mining sites. To attempt to determine the balance b...