Ladoke Akintola University of Technology

About: Ladoke Akintola University of Technology is a education organization based out in Ogbomoso, Nigeria. It is known for research contribution in the topics: Population & Adsorption. The organization has 2786 authors who have published 3066 publications receiving 36850 citations. The organization is also known as: Oyo State University of Technology & LAUTECH.

Thermal runaway and thermodynamic second law of a reactive couple stress hydromagnetic fluid with variable properties and Navier slips

Abstract: Theoretical solutions of a thermal runaway and irreversibility thermodynamic analysis of a couple stress hydromagnetic reactive fluid with Navier slip conditions and variable properties are examined. Ignoring the material assumption, the fluid is taken to be actively exothermic under Bimolecular kinetics. The dimensionless modeled equations are analytically solved using weighted residual method coupled with collocation techniques to obtain the bifurcation branch chain for criticality, irreversibility rate, flow rate and heat distribution solutions. It was noticed that the variable properties have no significant influence on the couple stress reactive liquid and heat distribution. Also, at high thermodynamic equilibrium, entropy generation in the system is minimized. This study results will help in understanding the relationship that exist between thermal explosion and thermal branched-chain in managing industrial engines in order to avoid system blow up.

Modeling of rain attenuation and site diversity predictions for tropical regions

Abstract: . Presented in this paper is an empirical model for long-term rain attenuation prediction and statistical prediction of site diversity gain on a slant path. Rain attenuation prediction on a slant path is derived using data collected from tropical regions, and the formula proposed is based on Gaussian distribution. The proposed rain attenuation model shows a considerable reduction in prediction error in terms of standard deviation and root-mean-square (rms) error. The site diversity prediction model is derived as a function of site separation distance, frequency of operation, elevation angle and baseline orientation angle. The novelty of the model is the inclusion of low elevation angles and a high link frequency up to 70 GHz in the model derivation. The results of comparison with Hodge, Panagopoulos and Nagaraja empirical predictions show that the proposed model provides a better performance for site separation distance and elevation angle. The overall performance of the proposed site diversity model is good, and the percentage error is within the allowable error limit approved by International Telecommunication Union – Region (ITU-R).

Anti-tuberculosis activities of the crude methanolic extract and purified fractions of the bulb of Crinum jagus.

Abstract: Summary : Tuberculosis (TB) is of great public health burden globally especially in developing countries of Africa and Asia Current TB regimen involves multiple therapies and of long duration leading to poor patient adherence There is also the challenge of multidrug resistant TB Hence, there is a need for discovery of new anti- TB drugs This study was designed to investigate the in –vitro activity of the crude methanolic extract and chromatographic fractions of the bulb of Crinum jagus against Mycobacterium tuberculosis isolates The extracts were screened for anti- TB activity against three different M tuberculosis isolates and a drug susceptible reference strain H37Rv using Lowenstein Jensen (L-J) medium and Middlebrook 7H10agar The crude extract was prepared using soxhlet extraction apparatus while the purified fractions were obtained by column chromatography The two media were inoculated with M tuberculosis strains, after which the crude and purified extracts were added After 4-6 weeks incubation, colony forming units were counted and percentage inhibition calculated The crude extract and the purified fractions showed inhibitory activity on all the isolates tested including the reference strain Fraction 3 showed the highest inhibitory percentage (86%) among the extracts At a concentration of 10mg/ml, the percentage inhibition of fraction 3, rifampicin and isoniazid against M tuberculosis strain 3 were 83%, 95% and 86% in L-J medium respectively while 86%, 96% and 89% were obtained respectively in Middle brook medium Results showed that the crude methanolic extract and the purified fractions of the bulb of Crinum jagus exhibited anti-mycobacterial activity which is an indication of promising potential of this plant for the development of anti-tuberculosis agent Keywords : Crinum jagus , Chromatographic fractions, Mycobacterium tuberculosis, In-vitro

Akara Ogbomoso: microbiological examination and identification of hazards and critical control points.

Abstract: Akara Ogbomoso was examined toward the establishment of hazard analysis and critical control point (HACCP). The akara was produced in residential buildings with the attendant consequence of contamination. There was ample growth of aerobes, coliforms, staphylococci, Shigella and yeast/mold from the samples, water and cowpea pastes. Microbial contaminations occur through the processing, which can be corrected through education by adopting good hygienic and manufacturing practices. The critical control points were identified as frying, storage and refrying. It may be heated in the microwave for 10 s before consumption. Akara, prepared in the laboratory through the implementation of HACCP was not contaminated. Several bacterial isolates, namely; Escherichia coli, Staphylococcus aureus, Staphylococcus epidermidis, Citrobacter freundii, Serratia marcescens, Proteus vulgaris, Bacillus cereus, Streptococcus pyogenes, Bacillus sp. and Shigella sp., showed multiple resistance to antibiotics ranging from two to nine. Seven strains were not resistant to the antibiotics, while five were resistant to one type of antibiotic.