International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2501

Table of Content: August 2007; 2(8)

August 2007

Removal of chromium from an aqueous solution using Azadirachta indica (neem) leaf powder as an adsorbent

In the present investigation, Azadirachta indica (neem) leaf powder is used as an adsorbent for the removal of chromium from aqueous solutions. The equilibrium studies are systematically carried out in a batch process, covering various process parameters that include agitation time, adsorbent size and dosage, initial chromium concentration, volume of aqueous solution and pH of the aqueous solution. Adsorption...

Author(s): P. Venkateswarlu, M. Venkata Ratnam, D. Subba Rao and M. Venkateswara Rao

  • Article Number: 882889513231

August 2007

Free chlorine residual content within the drinking water distribution system

This paper explains the principle of chlorination and reveals the free chlorine residual content within a drinking water distribution system located in peninsular Malaysia. The study found that the free chlorine at user points was slightly greater than 0.3 mg/l, which is higher than the WHO standard at 0.2 - 0.3 mg/l. Despite that it was not a guarantee to lower the level of the microbial since the results showed that...

Author(s): Rosalam HJ. Sarbatly and Duduku Krishnaiah

  • Article Number: 89BB55713234

August 2007

Pollution profiles of non-metallic inorganic and organic pollutants of drinking and potable waters due to mining activities in Ishiagu (Ebonyi State) of Nigeria

The pollution of drinking and potable water sources due to mining activities in Ishiagu District of Ebonyi State of Nigeria, by non-metallic inorganic and organic pollutants was investigated. Water samples were abstracted from the Ivo River (IR), Ishiagu Central School borehole (IB), Amaokwe General Hospital borehole (AB), Amaeke community well (AW1) and Amata community well (AW2). The Ivo River courses through the...

Author(s): Duruibe, Joseph O., Ogwuegbu, M. O. C. and Egwurugwu, Jude N.

  • Article Number: 85C61F613237

August 2007

Isotherm and thermodynamic studies of the biosorption of Cd(II) from solution by maize leaf

The removal of Cd(II) from dilute solutions using maize (Zea mays) leaf as the biosorbent was studied. The effects of pH, contact time and initial metal ion concentration on the biosorption were monitored. The residual Cd(II) in solution was determined using atomic absorption spectrophotometer. The biosorption was found to be pH-dependent and the optimum pH for the biosorption was pH 3. The biosorption was also...

Author(s): N. A. Adesola Babarinde, J. Oyebamiji Babalola and S. Olalekan Sanni

  • Article Number: D8CAE9213239

August 2007

Synthesis and molluscicidal activity of some new substituted-furan and furo[2,3-d]pyrimidine derivatives

1-benzoyl-3-bromo-2-phenylpropenedinitrile derivative 1 reacted with potassium hydroxide to afford the furan derivatives 4 and 5. The furan derivative 5 reacted with formamide, phenyl isothiocyanate, malononitrile, and trichloroacetonitrile to afford the furo[2,3-d] pyrimidine derivatives 6, 8, 11 and 16 respectively. The reaction of 5 with ethyl cyanoacetate afforded however the furo[2,3-b]pyridine derivative...

Author(s): Fathy M. Abdelrazek, Farid A. Michael and Sherif F. El-Mahrouky

  • Article Number: 70020C713242

August 2007

A robust nonlinear observer for states and parameters estimation and on-line adaptation of rotor time constant in sensorless induction motor drives

This paper presents a robust non linear observer for variables and parameters estimation in sensorless Indirect Field Oriented Control (IFOC) of induction motors (IM). Based on the reduced order of the IM model, the rotor fluxes and time constant are estimated with the High Gain Observer (HGO) using only the stator currents and voltages. This reduced order model offers many advantages for real time identification and...

Author(s): M. Messaoudi, L. Sbita and M. N. Abdelkrim

  • Article Number: 2D6DC1A13248

August 2007

Influence of electroporation on matrix metalloproteinases (MMPs) pattern activity in malignant glioma cells propagated ex vivo

Cells exposed to short and intense electric pulses become permeable to a number of various ionic molecules. This phenomenon was termed electroporation or electropermeabilization and is widely used for in vitro drug delivery into cells and gene transfection. The present work is a trial to study the effect of single exponential pulsed electric field (PEF) using intensity range 0.3 to 5.7 KV /cm and 1 m sec...

Author(s): Monira M. Rageh, Anwar A. Elsayed, Amr A. Abd-Elghany, Mohammed S. Mohammed

  • Article Number: 4E06C1013258