September 2008

Biosorption of Zn(II) from an aqueous solution by Erythrina variegata orientalis leaf powder

In the present investigation, the biosorption is carried out in a batch process to test the suitability of abundantly and freely available plant based material, Erythrina variegata orientalis (Indian coral tree) leaf powder, as an adsorbent for removal of Zn(II) from aqueous solution. The influence of various process parameters like agitation time, adsorbent size and dosage, pH of the aqueous solution and...

Author(s): P. Venkateswarlu, G. Vijaya Durga, N. Chitti Babu and M. Venkateswara Rao

September 2008

Estimation of air aerosol number concentration by indirect method

The estimation of the air aerosol number concentration variation was carried out in this work making use of data obtained from the Bauchi Road Campus of the University of Jos, Plateau State, Nigeria in 1990. The aerosol number concentration was determined indirectly, making use of the intensity of light scattered by particles. The scattered light intensity is proportional to the average number...

Author(s): I. U. Chiemeka 

September 2008

Empirical models for the correlation of global solar radiation with meteorological data for Iseyin, Nigeria

A number of multilinear regression equations were developed to predict the relationship between global solar radiations with one or more combinations of the following weather parameters: clearness index, mean of daily temperature, ratio of maximum and minimum daily temperature, relative humidity and relative sunshine duration for Iseyin Nigeria for five years (1995 - 1999). Using the Angstrom model as the base,...

Author(s): Falayi E. O., Adepitan J. O. and Rabiu A. B.

September 2008

Design and implimentaton of a model (ATLC-2007DNM) of an automated traffic light controller

In this work, a model of an automated traffic light controller (ATLC –2007DNM) had been designed and implemented, using electronic instrumentation and experimental techniques in electronic engineering and physics, to manage the traffics at the busy four- ways junctions along Sahuda road in Mubi North,Adamawa State, Nigeria. The designed was achieved with the help of low power transformer rating of 3.6 watts,...

Author(s): Danladi A., Ndatuwong L. G. and Malgwi D. I.

September 2008

Characterization of a stable isoenzyme of malate dehydrogenase (MDH1) from blood stream Trypanosoma vivax

MDH1, isoenzyme of malate dehydrogenase from blood stream Trypanosoma vivax was characterized. The enzyme was active over a broad pH and temperature range with optimal values of 5.0 and 35oC respectively. The energy of activation was 20.58kj/mol and the pKa values were 6.8 and 7.8 implicating ionizable groups at the catalytic site. Kinetic studies conducted in the direction of oxaloacetate reduction gave...

Author(s): Wurochekke, A. U., Nok, A. J., Inuwa, H. M and Gimba, C. E

September 2008

Studies of instantaneous thermal refraction and nonlinear scattering effect in C60/toluene solution

Nonlinear refraction and scattering effect properties of C60/toluene solution were studied by using the Z-scan technique and 532 nm laser delivering 4 nanosecond (ns) pulses. With single ns pulse, reverse saturable absorption (RSA) and negative nonlinear refraction were observed, and the nonlinear scattering effect in the solution could not be ignored when the pulse energy was large enough. The refraction cross-section...

Author(s): Jinyong Wang, Yinglin Song and Junyi Yang