Browsing by Author "Adebayo, S.A"
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Item Adsorption of Chlorotriazine herbicide onto unmodified and modified Kaolinite- Equilibrium, Kinetic and thermodynamic studies(ELSEVIER, 2019) Nwosu, F.O.; Ajala, O.J.; Okeola, F.O.; Adebayo, S.A; Olanlokun, O.K.; Eletta, A.O.In the recent time, adsorption is a commonly economical way for removal of pollutants from wastewater. Chlorotriazine has been a serious threat to life of both human and animal. Modified kaolinite clays were separately prepared by chemical impregnation method with 2 H2SO4 and 2M NaOH respectively in w/v of 1:2 for a period of 24h to give unmodified kaolinite (UKC), 2 M H2SO4 modified kaolinite (2-AKC) and 2 Mm3 NaOH modified kaolinite clays (2-BKC) respectively. The UKC with maximum intake value (125.3 mg/g) was derived at equilibrium of 1100 mg/L while 96.65 mg g 1 of 2-AKC was obtained at equilibrium of 500 mg L-1 and that of 2-BKC was found at equilibrium of 700 mg/L. the Langmuir isotherm best explained the removal of Chlorotriazine onto various kaolinite clays while pseudo 2nd order kinetics fitted best. Thus, kaolinite clays have been proved as a potential adsorbent for the removal of chlorotriazine molecules.Item Adsorption of chlorotriazine herbicide onto unmodified and modified kaolinite: Equilibrium, kinetic and thermodynamic studies(Elsevier, 2019) Nwosu, F.O; Ajala, O.J; Okeola, F.O; Adebayo, S.A; Olanlokun, O.K; Eletta, A.OIn the recent time, adsorption is a commonly economical way for removal of pollutants from wastewater. Chlorotriazine has been a serious threat to life of both human and animal. Modified kaolinite clays were separately prepared by chemical impregnation method with 2M H2SO4 and 2M NaOH respectively in w/ v of 1:2 for a period of 24h to give unmodified kaolinite (UKC), 2M H2SO4 modified kaolinite (2-AKC) and 2Mm3 NaOH modified kaolinite clays (2-BKC) respectively. The UKC with maximum intake value (125.3mg/g) was derived at equilibrium of 1100mg/L while 96.65mgg−1 of 2-AKC was obtained at equilibrium of 500mgL−1 and that of 2-BKC was found at equilibrium of 700mg/L. The Langmuir isotherm best explained the removal of Chlorotriazine onto various kaolinite clays while pseudo 2nd order kinetics fitted best. Thus, kaolinite clays have been proved as a potential adsorbent for the removal of chlorotriazine moleculesItem Bioactive Metabolites in improved cowpea seeds(2005-06) Ameen, O.M; Fatope, O.M.; Usman, L.A; Adebayo, S.AThe International Institute of Tropical Agriculture (IITA) has developed some pest and disease resistant cowpeas. From these, the seeds of 8 cowpea cultivars were extracted with ethanol, and partitioned into chloroform and water-soluble fractions, the water-soluble fraction was further extracted with ethyl acetate. Residues from ethanol, chloroform and ethyl acetate soluble fractions for each of the 8 cowpea cultivars were screened against brine shrimp larvae. The see extracts of cowpea cultivars IT93K-596-9-12, IT90K-277-2 and IT93K – 452 – 1 were found to be most active, indicating that they contain cytotoxic compound(s).Item Chemical Composition of Leaf Essential Oil of Annona senegalensis Pers. (Annonaceae) growing in North Central Nigeria(2010) Ameen, O.M; Usman, L.A; Oganija, F.S.; Hamid, A.A.; Muhammed, N.O; Zubair, M.F.; Adebayo, S.ALeaf essential oil of Annona senegalensis Pers. obtained by hydrodistillation was analysed using GC and GC/MS. The analyses revealed the abundance of oxygenated monoterpenes (65.0%). The major constituents were citronellal (30.0%), citronellol (14.8%), geranial (17.2%), thymol (8.1%), β-caryophyllene (7.8%) and carvacrol (6.92).Item Dissolution Kinetics Studies of Nigeria Gypsum Ore in Hydrochloric Acid(2018) Adekola, F.A.; Adebayo, I.O.; Baba, A.A; Adebayo, S.ADissolution kinetics studies of gypsum ore sourced from Postikum, Northern Nigeria, was conducted using hydrochloric acid as the leachant. The study was done with the aim of establishing possibility for the development of hydrometallurgical route for the production of highly pure gypsum. The effects of the experimental variables investigated were contact time, acid concentration, temperature, particles size and solid-liquid ration. The energy of activation of the dissolution reaction estimated from experimental data is 9.6kJ mol-1. Leaching in 6 M HCl solution, at temperature of 80oC, stirring speed of 400 rpm and using -90 + 63 µm particles size resulted in 99.7% dissolution of the ore within 120 min. The ore and the leached residue were characterized using X-ray Fluorescence (XRF), X-ray Diffraction (XRD), and Scanning Election Microscope (SEM) coupled with energy dispersive spectroscopy techniques (EDS) for chemical composition, phase and morphology. Statistical analysis of the kinetic dissolution data show that the chemical controlled model best describes the gypsum dissolution in hydrochloric acid.Item Employee motivation and public sector fraud: evidence from Kwara state, Nigeria(Federal University of Agriculture Abeokuta, 2013) Olaniyi, T.A; Saad, T; Abiola, W.O; Adebayo, S.AThis study examines the relationship between fraud and employee motivation in Kwara state public sector with a view to ascertain what will happen to fraud occurrence if good salary, allowances and perquisites, effective working hours, conducive environment, timely promotion are put in place. Multistage sampling technique was used in obtaining the primary data used from 870 respondents selected from 7 local governments in the state and were analyzed using Ordinary Least Square Regression and Friedman ANOVA test but interpreted using R2 adjusted R2, Durbin Watson statistics, F statistics and t statistics. The result show that employed motivational factors (salary, perquisites and regular promotion) can reduce fraud activities among the state employees; this is consonance with theoretical expectations (Douglas McGregor’s theory Y, Abraham Maslow’s needs theory and Fredric Herzberg’s two-factor theory). Contrarily, allowances, conducive environment and training show a positive relationship with fraud and this is at variance with a-priori expectations. The study recommends that government should improve the working conditions of its employees including the provision of improved training to motivate employees towards efficiency, commitment and inhibit fraud inclinations. If all these are put in place and erring officials are made to face the full wrath of the law without bias, the state economy in particular and Nigeria economy in general will be better for it.Item Perception of Inter-generational Farm Transfer among Cocoa Farmers in South-west, Nigeria.(International Journal of Agricultural Science, Research and Technology in Extension and Education Systems, 2021-12) 1. Ogundiran, T. J.; Adebayo, S.A; Ogunlade, IInter-generational farm transfer, a multifaceted process involving succession plan, retirement and inheritance has been recognized as the main and major approach to overcome the issues of ageing population and family farm sustainability. The study therefore focused on the perception of inter-generational farm transfer by cocoa farmers in South-west, Nigeria. A multistage sampling procedure was used to select 331 cocoa farmers. The data was collected through interviewer administered questionnaire and analysed using percentage, frequency distribution, means, charts and chi square. Results showed that majority of the respondents were male (77.0%), having farm size of 5 ha and below, the mean age of the respondents was 58 years while the mean household size was 6. The result showed that 77.0% of the respondents have not retired from active involvement on cocoa farm while 83.0% of the have not identified a successor. The result further shows that 85.0% of the respondents have high (positive) perception of inter-generational transfer. Moreover, only few of the respondents (5.4%) had a formal or written inter-generational farm transfer plan. The study concluded that majority of the cocoa farmers have not retired from the farm and had positive perception of inter-generational farm transfer. The study recommended that cocoa farmers should endeavour to start planning for inter-generational farm transfer by selecting and grooming selected individuals in their family. Moreover, relevant stakeholders should create more awareness and orientate cocoa farmers on the importance and need to identify and engage possible successors early in order to ensure family farm sustainability and food security.