April 2007

Global dynamic of a mathematical model of competition in the chemostat

The purpose of this paper is to offer a complete global analysis of the behavior of solutions of either the variable - yield two microbial growths, limited by a single scare nutrient, or of competition between two microbial populations for a single limiting nutrient. Basically, we confirm that the variable - yield models make the same predictions concerning the growth of asingle population and...

Author(s): M. S. Zaki

April 2007

Implementation of a new 4th order runge kutta formula for solving initial value problems (I.V.Ps)

A new method for solving singular initial value problems in ordinary differential equations is developed and implemented using the test problem in (1). Results generated through a FORTRAN program were found to be highly accurate and consistent with minima errors in the solution of some selected singular ivps. A comparison of the results generated from the formula was carried out with other Runge Kutta formulae and were...

Author(s): G. U. Agbeboh, U .S. U Aashikpelokhai and I. Aigbedion

April 2007

Ligand-dependent reactivity of cysF9(93)β of minor duck hemoglobin induced by inositol hexakisphosphate

The reactivities of the sulphydryl groups of minor component of duck hemoglobin with 5,51-dithiobis-(2-nitrobenzoic acid), DTNB, in the presence of inositol hexakisphosphate (inositol-P6) have been studied.  The reaction has been monitored as a function of pH (pH 7.0 – 9.0) and at ionic strength of 50 mmolL-1.  The carbonmonoxy and aquomet derivatives were used for the study. Biphasic time courses were...

Author(s): N. A. Adesola Babarinde, J. Oyebamiji Babalola and Olufemi O. Adeyemi

April 2007

A sonar system modeled after spatial hearing and echolocating bats for blind mobility aid

This paper present a sonar system modeled after human spatial hearing and echolocating bats. It’s composed of three transducers, one transmitter which plays the role of the mouth of the bat that transmits echolocating signal and two receivers located respectively near the left ear and the right ear so as to mimic human ears configuration. Inaudible ultrasound echoes captured at the receivers are converted into...

Author(s): Bitjoka Laurent and Takougang Noupowou Alain Christian