December 2013

Numerical solution for a class of singular integral equations

This paper is concerned with finding approximate solution for the singular integral equations. Relating the singular integrals to Cauchy principal-value integrals, we expand the kernel and the density function of singular integral equation by the sum of the chebyshev polynomials of the first, second, third and fourth kinds. Some numerical examples are presented to illustrate the accuracy and effectiveness of the present...

Author(s): Samah M. Dardery and Mohamed M. Allan

December 2013

Similarities between photosynthesis and the principle of operation of dye-sensitized solar cell

Photosynthesis is the process of converting light energy into chemical energy and storing it in the bonds of sugar; while the operational principle of the dye-sensitized solar cell involve the absorption of light by a dye adsorbed by a photoanode. Electrons are released when the dye is illuminated. The comparison done here showed that there exist a lot of similarities between photosynthesis and the principle of...

Author(s): Efurumibe E. L. and Asiegbu A. D

December 2013

Adsorption study of Nymphaea alba for the removal of manganese from industrial waste water

The application of adsorbents obtained from Nymphaea alba as a replacement for costly conventional methods of removing heavy metal ions from waste water has been reviewed. Detailed adsorption study of manganese on N. alba was investigated. Batch adsorption study was carried out as a function of amount of adsorbent, contact time, thermal treatment, pH and agitation speed. The adsorbent to solution ratio and the metal ion...

Author(s): Shazia Khurshid, Shaheen Kausar, Sadia Afzal, Ahmed Adnan, Arshad Mehmood, Muhammad Arshad and Zafer Ahmad Bukhari