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Evaluation of Variations in Seed Vigour Characters of West African Rice (Oryza sativa L.) Genotypes Using Multivariate Technique  [PDF]
M. A. Adebisi, F. S. Okelola, M. O. Ajala, T. O. Kehinde, I. O. Daniel, O. O. Ajani
American Journal of Plant Sciences (AJPS) , 2013, DOI: 10.4236/ajps.2013.42047
Abstract: Seeds of 24 West African rice (Oryza sativa L.) genotypes were evaluated for seed vigour traits in the laboratory and field in two cropping seasons at the Research Farm of Federal University of Agriculture, Abeokuta, Nigeria. Seed yields of these genotypes were also determined in the field during the two seasons. Data collected on seed vigour traits were subjected to multivariate analysis including principal component analysis (PCA) and cluster analysis. The first three axes of the principal component analysis across the two seasons captured 86.34% of the total variation among the entries and identified seedling vigour index-I, seedling vigour index-II, speed of germination index, percentage germination, seedling establishment, emergence percentage and seed yield per plant as the characters contributing most to the variation. Cluster analysis classified these genotypes into four distinct groups based on germination and emergence percentages. Fifteen of the genotypes with mean values of between 60.43% and 65.18%, clustered in group 1, two genotypes each with mean values of 65.71% and 58.81% and 20.11% and 29.49% clustered in groups II and IV respectively while the remaining five genotypes with mean values of between 55.19% and 55.88% clustered in group III. Hybridization of genotypes across dusters could lead to increase in heterosis in cross progenies. Those characters identified by PCA could be included in the crop improvement programme for improved seed quality within West African low land rice germplasm.
Mathematical Modelling of Cardiac Electrical Activity Using Bidomain Approach
O.I. Adebisi,I.A. Adejumobi,I.O. Abiala,S.O. Omotainse
Journal of Computations & Modelling , 2012,
Abstract: In recent times, mathematical model of cardiac electrical activity has been recognized as one of the significant approaches capable of revealing diagnostic information about the heart. However, an efficient and accurate mathematical technique required for this modelling is one of the major problems in the field of biomedical research. This work presents mathematical modelling of cardiac electrical activity using bidomain approach. The cardiac electrical activity is best mathematically modelled coupled systems of ordinary differential equations and partial differential equations which are non-linear, stiff, and therefore difficult to solve numerically and implement. Hence, the bidomain model was adopted due to its ability to reflect the actual cardiac wave propagation. Explicit forward Euler method and 2-D network modelling were respectively used for time- and space-discretisation of the derived bidomain equations coupled with FitzHugh-Nagumo’s ionic equations to obtain linearized equations for transmembrane potential Vm, extracellular potential φε and gating variable w which are the main variables of interest. We implemented the linearized equations using code developed from Java 6.0 version to obtain the time characteristic of transmembrane potential Vm. The results of this work provide some insights into the nature of electrical wave propagation pattern in the normal cardiac tissue.
Proximate Composition and Phytochemical Screenings of Crotalaria retusa Leaves and Seeds  [PDF]
J. A. Alalade, J. A. Akinlade, A. A. Akingbade, C. B. Emiola, I. A. Adebisi
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105058
Abstract:
The leaves and seeds of Crotalaria retusa were evaluated for the proximate, mineral and anti-nutritional contents in a completely randomized design. Atomic absorption spectrometry was used in determination of the seeds and leaves for phosphorus, potassium, magnesium, calcium and iron. Anti-nutritional factors (ANFs) including tannin, oxalate and phytate were also determined using appropriate technique. The result of proximate analysis indicated that leaves and seeds had high crude protein (18.00% and 14.63%), dry matter (94.78% and 90.98%), Ash (7.00% and 8.02%), crude fiber for both leaves (12.75%) and seed (28.44%) and the ether extract was (4.60%) and (5.03%) for leaves and seeds respectively. Mineral analysis indicated the Crotalaria retusa leave and seeds contained some essential mineral such as %P (0.37%) leave and (0.47%) seeds, %K (0.97%, 0.68%), %Mg (0.48%, 0.64%), %Ca (0.58%, 0.78%) and Fe (76.10 mg/kg) for leaves and (70.10 mg/kg) seeds of Crotalaria retusa. The leaves and seeds of Crotalaria retusa had low concentration of anti-nutrient factors; phytate (0.01%) leave and (0.06%) seed, oxalate (0.07%) leave and (0.09%) seed, tannin contents were (0.02%) and (0.05%) for leaves and seeds respectively. The overall results suggested that Crotalaria retusa leaves and seeds were of high nutritionally quality due to high protein and mineral contents with low presence of anti-nutritional factors.
Heavy Metal Contents of Effluents and Receiving Waters from Various Industrial Groups and their Environs in Ibadan, Nigeria
S.A. Adebisi,K.O. Ipinmoroti,I.A. Amoo
Research Journal of Applied Sciences , 2012,
Abstract: The effluent and receiving water and soil quality from thirty three industries from seven different industrial groups, namely: Food (10), Chemical (6), Plastic (7), Pharmaceutical (2), Steel (4), Cardboard (2) and Glass (2) in Ibadan metropolis was investigated. Heavy metals (cobalt, chromium, copper, iron, magnesium, manganese, lead and zinc), anion (nitrate and chlorides) and cation (phosphate and ammonium) contents of the samples were determined using standard methods. Results show that soils around food and chemical industries had significantly higher (p< 0.05) heavy metal contents. Soil lead content around food and chemical industries are significantly higher (p< 0.05) than values obtained for effluents, receiving waters and plants in their environs. Lead content is highest in soils (2.48 mg L 1) but lowest in the effluents discharged (0.13 mg L 1), the receiving water (0.22 and 0.25 mg L 1) and plants (0.28 mg L 1) around steel industries. A similar pattern was observed for Pharmaceutical and Glass Industries. Pb discharge is highest in effluents from Cardboard and Paper industries while significantly lower values were obtained for the other industries. Lead contents are 0.14, 0.21, 0.17, 0.21 mg L 1 and 0.12, 0.19, 0.12 and 0.19 mg L 1 in the effluent, plants, upper receiving and lower receiving waters in soils around chemical and plastic industries, respectively. Magnesium and cobalt, manganese and magnesium, manganese and cobalt, cobalt and zinc were highest in effluents released by steel, cardboard, pharmaceutical and glass industries, respectively.
Soil Quality Around Chemical Industries in Ibadan Metropolis
S.A. Adebisi,I.A. Amoo,K.O. Ipinmoroti
Research Journal of Applied Sciences , 2012,
Abstract: The effluent and receiving water and soil quality from six chemical industries in Ibadan metropolis was investigated. The heavy metal, minerals and physicochemical properties of the effluents and receiving waters were determined using standard methods. Results show that Cobalt, chromium, copper, Iron, magnesium, manganese, zinc and lead contents of effluents range between 0.17-0.39, 0.04-0.11, 0.01-0.06, 0.04-0.16, 0.09-1.47, 0.06-0.90, 0.12-0.14 and 0.15-0.37 mg L 1, respectively. The heavy metal contents the effluents fall within recommended range. Iron, lead and zinc levels are significantly (p< 0.05) higher in environments around compared with the control samples. The effluents are rich in inorganic compounds, free ammonia, phosphates, chlorides and nitrates. Significant decreases were recorded in the electrical conductivity and total solids of receiving waters while significant increases were recorded in hardness, dissolved solids, BOD and COD. The levels of calcium and zinc were low and values within the critical limit thus posing little threat to ground water quality.
Effluent and Receiving Water Quality near Food Processing Industries in Ibadan Metropolis
K.O. Ipinmoroti,I.A. Amoo,S.A. Adebisi
Journal of Food Technology , 2013,
Abstract: The effluent and receiving water quality from ten food processing industries, comprising beverage, confectionery and oil processing industries, in Ibadan metropolis was investigated. The heavy metal, minerals and physicochemical properties of the effluents and receiving waters were determined using standard methods. Results show that cobalt, chromium, copper, iron, magnesium, manganese, lead and zinc contents range between 0.46-2.75, 0.06-0.11, 0.01-0.02, 0.02-0.06, 0.20-1.81, 0.09-1.38, 0.11-0.14 and 0.07-0.29 mg L-1 respectively. Anions (chlorides and nitrates) , cations (phosphate, ammonium), biological and chemical oxygen demand were higher in the effluents. Sodium and potassium were the most predominant minerals in the effluents and receiving waters. Receiving water quality was significantly (p<0.05) influenced by effluent discharge by these industries.
Dynamical modelling of cardiac electrical activity using bidomain approach: The effects of variation of ionic model parameters  [PDF]
Adebisi O. Ibrahim, Adejumobi I. Adediji, Dada J. Olufemi
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.66076
Abstract:

This work presents the dynamical modelling of cardiac electrical activity using bidomain approach. It focuses on the effects of variation of the ionic model parameters on cardiac wave propagation. Cardiac electrical activity is governed by partial differential equations coupled to a system of ordinary differential equations. Numerical simulation of these equations is computationally expensive due to their non-linearity and stiffness. Nevertheless, we adopted the bidomain model due to its ability to reflect the actual cardiac wave propagation. The derived bidomain equations coupled with FitzHugh-Nagumo’s ionic equations were time-discretized using explicit forward Euler method and space-discretized using 2-D network modelling to obtain linearized equations for transmembrane potential Vm, extracellular potential φe and gating variable w. We implemented the discretized model and performed simulation experiments to study the effects of variation of ionic model parameters on the propagation of electrical wave across the cardiac tissue. Time characteristic of transmembrane potential, Vm, in the normal cardiac tissue was obtained by setting the values of ionic model parameters to 0.2, 0.2, 0.7 and 0.8 for excitation rate constant ε1, recovery rate constant ε2, recovery decay constant

Evaluating Mergers and Acquisition as Strategic Interventions in the Nigerian Banking Sector: The Good, Bad and the Ugly
B. E. A Oghojafor,Sunday Abayomi Adebisi
International Business Research , 2012, DOI: 10.5539/ibr.v5n5p147
Abstract: This study evaluated Merger/Acquisition as an intervention strategy in the Nigerian banking sector. The objective was to identify whether this strategy has actually achieved the desired result for which it was purposed, especially, in the popular Nigerian merger of 2005. To this end, the study was carried out using both primary (questionnaire) and secondary (banks financial statements) data. 100 copies of questionnaire were administered on the management members of the sampled banks. From the three hypotheses that were tested; hypothesis 1 result revealed the calculated t-statistics (t = 6.591 P < 0.05) signifying that, Merger/Acquisition had helped to curb the distress that would have occurred in the Nigeria banks during the period it was executed. Hypothesis 2 which measured performances in pre and post-merger showed that, the average capital of banks sampled in pre Merger period was N1433.20 million while post Merger period was N6358.76 million and the difference was statistically significant at 0.05 level (t = 6.755, P < 0.05). Profit recorded for pre Merger period was N 2192.48 million while post Merger profit was N16839.12 million thereby creating significant differences between pre and post Merger profit which was statistically significant at 0.05 level (t = 5.276, P < 0.05), implying that, banks performance in post Merger was significantly different from the performance before Merger. Hypothesis 3 evaluated whether bad corporate governance was responsible for this merger; the calculated t-statistics was (t = 3.197, P < 0.05) and it was decided that there would not have been need for merger if good corporate governance had been in place. Based on these findings, it was recommended that merger/acquisition should not be hastily implemented; rather, it should be carefully applied when the objective for the intending firms is to achieve synergy; and that, corporate governance should be given priority attention by both the regulatory agencies and shareholders so that erring bank directors can be sanctioned appropriately.
Strategic Influence of Promotional Mix on Organisation Sale Turnover in the Face of Strong Competitors
Adebisi Sunday A.,Babatunde Bayode O.
Business Intelligence Journal , 2011,
Abstract: This paper aim at study strategic influence of promotional mix on organisation sale turnover in manufacturing organisation. The research data were gathered through the use of secondary data and primary data, secondary data included 6years annual report comprising the sales turnover (2005-2009) and questionnaire which is an instrument of primary data collection. The questionnaires were administered to the workers of 7up Company and some customers in Solebo Estate in Lagos. The researcher adopted the simple percentage and regression model for the analysis of the collected data. The result of the findings revealed that strategic promotional mix influences the sale turnover with little 25% while other variable not included in the variable tested takes the larger 75% that will rapidly lead to organisation growth. Since promotional mix constitute few % of variable that can push an organisation to the highest level, therefore other factors of marketing mix such as product development, effective pricing, distribution of right quality and quantity to the consumers should be appropriately considered.
Andropause: An emerging world health problem
J K Olarinoye, S A Adebisi, A A Popoola
West African Journal of Medicine , 2006,
Abstract:
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