November 2007

Analysis of street dust for heavy metal pollutants in Mubi, Adamawa State, Nigeria

This study is aimed at determining the elemental concentrations of heavy metal pollutants that may be present in street dust samples in Mubi, Adamawa state, Nigeria. Dust samples were collected in mechanical workshops (MWK), motor parks (MPK), market areas (MKA), roundabouts/highways (RHW) and residential areas (RDA). The dust samples were digested using aqua regia digestion method and Flame Atomic Absorption...

Author(s): Shinggu, D. Y., Ogugbuaja, V. O.., Barminas, J. T., and Toma, I.

November 2007

Preliminary evaluation on the application of grafted membranes for sorption of lead and copper ions in aqueous solution

Blend membrane of sodium alginate (Na-Alg) and poly (acrylamide) grafted konkoli gum (KG-g-PAAM) in the ratio of 80:20 was studied for sorption of Pb2+ and Cu2+ in aqueous solution. Membrane sorption capacities for Pb2+ and Cu2+ were found to be 99.18% and 63.32% respectively. The sorption behavior with respect to contact time, initial pH, temperature, ionic strength and initial metal ion...

Author(s): S. A. Osemeahon, J. T. Barminas, B. A. Aliyu and H. M. Maina

November 2007

Isotherm and thermodynamic studies of the biosorption of copper (II) ions by Erythrodontium barteri

The biosorption of Cu(II) from dilute aqueous solution using Erythrodontium barteri as a biosorbent has been studied as a function of pH, contact time and initial Cu(II) ion concentration at the temperature of  27o­­­C. The residual Cu(II) in solution was determined using atomic absorption spectrophotometer. The pH study shows that pH dependence of biosorption and optimum pH was 5. The study...

Author(s): N. A. Adesola Babarinde, O. O.Oyesiku and Omolola F. Dairo

November 2007

Enhanced measured synchronization of unsynchronized sources: inspecting the physiological significance of synchronization analysis of whole brain electrophysiological recordings

The analysis of synchronization, particularly phase locking, is being increasingly used in neuroscience to explore coordinated brain activity. The application of this methodology to magnetoencephalographic (MEG) and electroencephalographic (EEG) recordings would seem promising because these two recording techniques are not invasive and have great temporal resolution. However, current methods of synchronization analysis...

Author(s): Luis García Domínguez, Richard Wennberg, José L. Pérez Velázquez, Ramón Guevara Erra.