Ilorin Journal of Science最新文献

{"title":"Free Vibration Analysis of Non-uniform Rayleigh Beams on Variable Winkler Elastic Foundation using Differential Transform Method","authors":"TransformMethod Olotu, Agboola, O. O., Gbadeyan","doi":"10.54908/iljs.2021.08.01.001","DOIUrl":"https://doi.org/10.54908/iljs.2021.08.01.001","url":null,"abstract":"This study examines the effect of variable Winkler foundation on the natural frequencies of a prestressed nonuniform Rayleigh beam. In this work, the elastic coefficients of the foundations are assumed to vary along the length direction of the beam. A semi-analytical approach known as Differential Transform Method (DTM) is applied to the non-dimensional form of the governing equations of motion of the prestressed non-uniform Rayleigh beam and a set of recursive algebraic equations are obtained. Evaluating these derived equations and using some computer codes written and implemented in MAPLE 18, the non-dimensional frequencies and the associated mode shapes of the beam are obtained. The effects of variable Winkler foundation variations and axial force for various values of the slenderness ratio on the non-dimensional frequencies are investigated. The clamped-clamped and simply supported boundary conditions are considered to illustrate the accuracy and efficiency of this method. Finally, the results obtained are validated and are found to compare favorably well with those in the open literature.","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122389490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fatty-acid Composition, Physicochemical Analysis and Biological Potential of Underutilized seed of Leucaena leucocephala","authors":"","doi":"10.54908/iljs.2021.08.01.004","DOIUrl":"https://doi.org/10.54908/iljs.2021.08.01.004","url":null,"abstract":"","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116836695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anatomical Studies of Four Pleurotus Species Cultivated on Mansonia altisima Sawdust","authors":"","doi":"10.54908/iljs.2021.08.01.003","DOIUrl":"https://doi.org/10.54908/iljs.2021.08.01.003","url":null,"abstract":"Pleurotus (Fr.) Quel is a genus of gilled mushrooms, and are one of the most commonly cultivated edible mushrooms in the world. This work was aimed at cultivating and identifying/determining the anatomical features of Pleurotus species at different developmental stages. Four species of Pleurotus, namely Pleurotus florida, P. ostreatus, P.ostreatus var. F. and P. pulmonarius were cultivated on Mansonia altisima sawdust and supplemented with rice bran. The sawdust was sterilized in an autoclave at 121oC at 15 ibs pressure for 20 minutes. On cooling, spawn of each of the species were inoculated on the sterilized substrate. The inoculated bottles were incubated in a dark at controlled temperature of 15oc. Pure cultures of each of the mushroom were grown on PDA to obtain the mycelia stage. After mycelial colonization of the substrate, primordia stage and mature fruit body stage were studied morphologically and samples were harvested in vial bottles. The pinhead formation took 26 and 27 days for Pleurotus florida, P. ostreatus, respectively; and 28 days for P.ostreatus var. F. and P. pulmonarius. Harvesting of the mature fruiting bodies was done after 30 days for Pleurotus florida, 31 days for P. ostreatus and P.ostreatus var. F, and 33 days for P. pulmonarius. The mature fruit body comprise of the stipe, gills and pileus. Anatomical sections were then taken at 25 micron thickness, stained and mounted on glass slide. Hyphae arrangement, cell polarity, cell density, cell shape, stainability, fruit bodies initials, presence of cuticle, hymenium length, hymenophore structure, cell wall structure, presence of nodulus, presence of copious granules, cell wall structure and cell size were diagnostic and varies among the species. Dendogram of characters produced Pleurotus florida, P. Ostreatus and Pleurotus ostreatus var. F. in a cluster and Pleurotus pulmonarius as an outlier. Classification based on cluster analysis confirmed the original identification of the Pleurotus species studied. Pleurotus pulmonarius was well separated from Pleurotus ostreatus, Pleurotus florida and Pleurotus ostreatus var. f with a taxonomic distance (D=0.90). The study has shown that Mansonia altisima sawdust is a good substrate for the cultivation of Pleurotus species. Pleurotus ostreatus, Pleurotus florida and Pleurotus ostreatus var. f in a cluster demonstrated closer zymographic relationships. Variations in the characters used are useful in the identification of the four species studied.","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116728902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial Analysis of Distribution of Inmates in Nigeria Prisons","authors":"G. Oyeyemi, A. Kareem, Etannibi E. O. Alemika, A. Ibraheem, O. Oladuti","doi":"10.54908/iljs.2021.08.01.002","DOIUrl":"https://doi.org/10.54908/iljs.2021.08.01.002","url":null,"abstract":"The number of prison facilities available in Nigeria differs from state to state as well as across the regions. Hence the distribution of the inmates across these correctional facilities differs. This study investigates the distribution of the inmates across Nigeria correctional facilities (prisons) and the likely factors that may influence the distribution considering the spatial effect of the distribution. The considered factors are; year, month, state, region, gender and state population. Ordinary Least Square (OLS) was used to obtain the multiple regression model and Moran’s I test of spatial autocorrelation showed that there is presence of spatial autocorrelation in the distribution of inmates across Nigeria prisons. The Spatial Autocorrelation Regression Model (SARM) was therefore adopted to fit the regression model. While OLS approach indicated that all factors are significant except state, the SARM approach found both state and region not to be significant among the factors considered in the model. The SARM did not only give good compact spatial distribution of the inmates across Nigeria prisons it also gave a better predicted (forecast) values of inmates’ distribution than the OLS approach.","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134098221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variable Thermo-Physical and Electrical Field Influence on Nonlinear Convective Flow of non-Newtonian Fluid through an Inclined Annular Micro-Channel with Porosity","authors":"","doi":"10.54908/iljs.2021.08.01.005","DOIUrl":"https://doi.org/10.54908/iljs.2021.08.01.005","url":null,"abstract":"","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114996257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Solid-state and Solution-based Synthetic Reactions of Copper Complexes of two Anti-inflammatory Drugs with their Antibacterial Activity Studies","authors":"","doi":"10.54908/iljs.2020.07.02.003","DOIUrl":"https://doi.org/10.54908/iljs.2020.07.02.003","url":null,"abstract":"","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123895998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of some Physico-chemical Properties of Mango (Mangifera Indica L.) Pulp in South-south, Nigeria","authors":"","doi":"10.54908/iljs.2020.07.02.008","DOIUrl":"https://doi.org/10.54908/iljs.2020.07.02.008","url":null,"abstract":"","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130573057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Markov Chain Model for Determining Language Extinction","authors":"","doi":"10.54908/iljs.2020.07.02.005","DOIUrl":"https://doi.org/10.54908/iljs.2020.07.02.005","url":null,"abstract":"","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134559127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytochemical Constituents and Antimicrobial Activities of Ethanolic Extract of Luffa Cylindrica Seed","authors":"","doi":"10.54908/iljs.2020.07.02.001","DOIUrl":"https://doi.org/10.54908/iljs.2020.07.02.001","url":null,"abstract":"","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127111702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of Aeromagnetic Data and Pseudogravity Transforms in the Analysis of Structures and Mineralization Potential of Osi NE, Southwestern Nigeria","authors":"","doi":"10.54908/iljs.2020.07.02.006","DOIUrl":"https://doi.org/10.54908/iljs.2020.07.02.006","url":null,"abstract":"","PeriodicalId":197712,"journal":{"name":"Ilorin Journal of Science","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132019175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}