Nigerian Journal of Technological Research <p>The <em>Nigerian Journal of Technological Research</em> is a pure scientific journal with a philosophy of attempting to provide information on problem solving technology to its immediate environs and the international community. The scope of the journal is in the core areas of: Pure and Applied Sciences; Engineering Sciences; Environmental Sciences; Agricultural Sciences; Information and communication Technology; Management and Entrepreneurship sciences.</p> Federal University of Technology, Minna, Niger State, Nigeria en-US Nigerian Journal of Technological Research 0795-5111 Copyright is owned by the Federal University of Technology, Minna, Niger State Nigeria Land Rights and Improvement Investments Among Crop Farmers in Southwest, Nigeria <p>This study examined the effects of land rights on investment decisions of farmers and determinants of land rights as well as the impact of land rights on farm productivity in Southwest Nigeria. Multistage sampling process was used in the selection of 320 respondents for the study. Two-stage conditional maximum likelihood (2SCML) approach of multivariate probit regression model and Endogenous switching regression (ESR) model were used for the analysis of the collected data. The results of Average Treatment Effect on the Treated (ATT) estimates from ESR revealed that land rights increase farm productivity. This study further confirmed the importance of land rights in facilitating investment in soil-improving measures which subsequently leads to higher productivity. One of the policy implications emanating from this study suggests that having use and transfer rights as against use only rights goes a long way in enhancing investment in soil-improving or conservation measures.</p> <p><strong>Keywords</strong>: Crop, Investment, Land, Multivariate Probit Regression Model, Rights, Two-stage Conditional Maximum Likelihood.</p> Lawrence Olusola Oparinde Copyright (c) 2021-03-09 2021-03-09 16 1 1 12 10.4314/njtr.v16i1.1 Morphological differentiation in African catfish (Clarias gariepinus) from three different populations in Nigeria <p>Abstract<br>Intraspecific morphological variation in Clarias gariepinus was studied in three water bodies. Twenty-three morphometric characteristics and seven meristic were used. Principal component (PC) analysis showed that morphometric traits of River Osun and Ogbese were somewhat related while that of Aago showed no relatedness, there were no difference among the meristic counts of the populations. PC1, and PC2 accounted for 93% and 4% of the variation observed in the populations. High positive correlation was observed in Aago (r = 0.872, b = 2.10) and Ogbese population while low correlation and negative allometric growth (r = 0.425 and b= 1.38) was observed in Asejire population. Cluster analysis revealed that three studied populations are separated into two major clusters, with samples from Asejire and Ogbese population found within the same cluster but different sub- clusters, similarly some of samples from Aago were also within the same cluster while samples 10 were found on a separate and major cluster. The study confirms the variability among individual species within each population, indicates the presence of genetic diversity among the populations of C. gariepinus and the Pre-anal distance and dorsal fin ray count could be employed in the identification of populations of catfish.</p> <p><strong>Key words</strong>: morphometric traits, meristic characters, populations, allometric</p> Popoola Omoniyi Michael Olagunju Oluwatosin Olubunmi Copyright (c) 2021-03-09 2021-03-09 16 1 13 20 10.4314/njtr.v16i1.2 Effect of N- 3, 4-Dichlorophenyl -N, N-Dimethylurea (Diuron) Herbicide to Serum Biochemistry of <i>Clarias gariepinus</i> <p>Assessing the effect of Diuron herbicide on post juvenile African catfish (<em>Clarias gariepinus</em>) using specific biochemical markers could provide vital information concerning the health status with regards to electrolyte determination. The fishes were subjected to different concentrations of diuron of (0.5, 0.75, 1.0, 1.25, and 1.5mgL<sup>-1</sup> respectively) for 96hrs and the alterations in the serum enzymes, metabolites and ion level were determined. The lethal concentration (LC50) value of the herbicide was 1.0mg L<sup>-1</sup> for 96h of exposure. During the experiment different behavioural changes were observed and recorded and blood samples were collected after 96hours of experiment to check for the effect of fish exposed to different concentration of diuron herbicide and the parameters observed were serum enzymes (ALT, ALP, AST and LDH). Biochemical examination was also carried out to know the changes in Total protein, glucose and cortisol level. Ion level examination was carried out to assess changes in sodium (Na<sup>+</sup>), potassium (K<sup>+</sup>) and chloride (Cl<sup>-</sup>). It was observed that there were significant differences (P˂0.05) in the serum enzymes analysis, biochemical examination and ion level examination and these parameters revealed differences with varying concentrations of diuron herbicide. Thus, diuron possesses toxicity effects on<em> C. gariepinus</em></p> <p><strong>Keywords</strong>: Herbicide, <em>Clarias gariepinus</em>, serum enzymes</p> O.M. Popoola L.O. Olasoji Copyright (c) 2021-03-09 2021-03-09 16 1 21 25 10.4314/njtr.v16i1.3 Multicast Beamforming for SWIPT in MISO Full-Duplex Systems <p>This paper considers the multicast transmit beamforming and receive power splitting problem for sum transmit power minimization for a simultaneous wireless information and power transfer (SWIPT) system subject to signal-to-interference-plus-noise ratio (SINR), and energy harvesting constraints at the receiver. In particular, we consider the case of perfect and imperfect channel state information (CSI) at the base station. Using semidefinite relaxation (SDR) technique, we obtain solution to the problem with imperfect channel state information of the self-interfering channels.</p> <p><strong>Keywords</strong>: Simultaneous wireless information and power transfer, channel state information, Energy harvesting, semidefinite relaxation.</p> Alexander Akpofure Okandeji Copyright (c) 2021-03-09 2021-03-09 16 1 26 33 10.4314/njtr.v16i1.4 Computational design and static-structural analysis of a small-scale turbojet propulsive engine for an unmanned aerial vehicle <p>This study focused on the computational design and static structural analysis of a small-scale turbojet engine (SSTE) that can power an unmanned aerial vehicle with a thrust of 50 N at a speed of 8000 rpm. SOLIDWORKS 2018 was used to design the CAD geometry of the SSTE, and to carry out a CFD analysis on the compressor to determine the pressure distribution across the compressor and the compressor pressure ratio. The obtained pressure ratio was further used to carry out a structural analysis of the SSTE with emphasis on the turbine component using ANSYS static structural module. This analysis was done to determine the level of deformation of the chosen design material (stainless steel grade 310), the maximum and minimum stresses, factor of safety, and its fatigue life. Design and CFD results obtained shows that the design as well as the pressure distribution in the compressor is reliable. The 50N small scale turbojet engine showed higher optimum performance from structural design and evaluation when compared to that of the 70N thrust jet cat model. Results of the structural analysis shows that the turbine blades will experience minimum and maximum deformation of 0 m and 2.2543×10<sup>−5</sup> m at the leading edges and trailing edges of the blade chord respectively. Also, maximum and minimumstresses will occur at 1.0632×10<sup>5</sup> Pa and 6.7192×10<sup>7</sup> Pa respectively. Conversely, the factor of safety was within 3.0807 to 15 which show that the design is adequate. Additionally, considering the fatigue life, the SSTE is bound to fail completely at approximately 1.929×10<sup>7</sup> months. Therefore, the SSTE with the materials suggested above is capable ofpropelling an unmanned aerial vehicle considering the results obtained.</p> <p><strong>Keywords: </strong>Computational, static-structural, turbojet, UAV, design</p> Samuel O. Effiom Fidelis I. Abam Burhan Saeed Sunday O. Ochedi John E. Evareh Copyright (c) 2021-03-10 2021-03-10 16 1 34 42 10.4314/njtr.v16i1.5 Biosorption of lead by bacteria isolated from abattoir wastewater <p>Six bacteria were isolated from abattoir wastewater collected from Minna central abattoir. Lead tolerant bacteria were isolated from the wastewater. The isolates were then characterized on the basis of their colonial appearance and reaction to various biochemical tests. The lead tolerance profile of the isolates was carried out using agar diffusion method, with concentrations of Lead nitrate ranging from 50-250 mg/L. Two resistant isolates identified as species of <em>Bacillus</em> and <em>Neisseria</em> were selected for biosorption studies. Lead concentration was determined using Atomic Absorption Spectrophotometry. The lead biosorption capacity of the two isolates was studied by inoculating 2 mL of 24 hours old bacteria suspension in 50mL Nutrient broth, containing varying concentrations of lead (500 and 1000 mg/L) at varying pH (7 and 8), with representative samples being withdrawn at day 4, 8 and 12. The results showed that highest biosorption rate was recorded on day 10, at pH 7, in solution containing 500 mg/L of lead with 75.3% and 66% by <em>Bacillus</em> sp. and<em> Neisseria</em> sp. respectively. These results show that <em>Bacillus</em> sp. had better sorption capacity than<em> Neisseria</em> sp. Both organisms can be used for the removal of lead.</p> <p><strong>Keywords:</strong> Wastewater, Biosorption, Abattoir, heavy metal, Bacteria</p> O. P Abioye H.O Nnadozie S.A Aransiola O. I. Musa Copyright (c) 2021-03-11 2021-03-11 16 1 43 51 10.4314/njtr.v16i1.6 Comparative studies of the antimicrobial effect of ethanolic and aqueous extracts of <i>Garcinia kola<i> on <i>Klebsiella pneumonia</i> and <i>Candida albicans</i> in vitro <p>Antimicrobial resistance has become a global health problem. Although a wide range of chemotherapeutic antimicrobials are available for treatment of microbial related infections and diseases, development of resistance to these chemotherapeutic agents is rapidly on the increase. Extracts from some plants have shown some promise in antimicrobial activity. This has led to the screening of several medicinal plants for their potential antimicrobial activity. Therefore, this study was aimed at evaluating the antimicrobial effect of ethanolic and aqueous extracts of <em>Garcinia kola</em> against <em>Klebsiella pneumonia</em> and<em> Candida albicans</em> in vitro. The<em> Garcinia kola</em> seeds extracts were obtained using 70% ethanol and distilled water respectively. Phytochemical screening of <em>Garcinia kola</em> revealed the presence of various potent phytochemicals such as tannins, saponins, flavonoids, alkaloids and glycosides. Both extracts of the seeds were investigated for antimicrobial activity using disc diffusion and agar well diffusion sensitivity tests. The ethanol extract produced zones of inhibition of about 7.3 mm for <em>Candida albicans</em> only at a concentration of 800mg/ml for the disc diffusion test. For the agar well diffusion test, the aqueous extract produced zones of inhibition of about 9.5 mm, while the ethanol extract produced zone of inhibition of 19 mm against Candida albicans at a concentration of 800 mg/ml. However, at the same concentration, the ethanol extract produced zones of inhibition of about 8.5 mm against Klebsiella pneumoniae. The findings of this study revealed that <em>Garcinia kola</em> was not effective in treating <em>Klebsiella pneumonia</em> infections but has potential in treating <em>Candida albicans</em> infections.</p> <p><strong>Keywords</strong>: Garcinia kola, Klebsiella pneumonia, Candida albicans</p> Elizabeth Winful Olanikpekun Idowu Opeoluwa O. Fasanya Nkechi E. Egbe Copyright (c) 2021-03-11 2021-03-11 16 1 52 58 10.4314/njtr.v16i1.7 Co-infection of a mosquito borne arbovirus and parasite in dogs in Kaduna and Zaria metropolis, Kaduna state, Nigeria: A Case Report <p>During a survey in Kaduna and Zaria metropolis for West Nile virus and Dirofilaria in dogs, a single case of co-infection of the two organisms was observed in a dog. These organisms are both mosquito borne and are of great zoonotic importance.<br>Running title: Co-infection of West Nile virus and Dirofilaria in dogs.</p> <p><strong>Keywords</strong>: West Nile virus, dogs, Dirofilaria, co-infection</p> Fasanya Oluyinka O. A. Kabir A. J. Natala Copyright (c) 2021-03-11 2021-03-11 16 1 59 60 10.4314/njtr.v16i1.8 Effect of site sanitation on the safety performance of workers on construction sites in Minna, Nigeria <p>Studies have shown that site sanitation practices are capable of improving the health and safety (H&amp;S) performance of construction companies. In spite of this, evidence has shown that the level of compliance to these practices by construction firms is still poor. This study evaluated the effect of site sanitation on the safety performance of workers on construction sites. Data were obtained through a well-structured questionnaire. Analysis of data was done using Relative Importance Index (RII), Mean Item Score (MIS) and Spearman’s Rank Correlation. It was found that provision of first aid facilities is the measure most complied with on sites (RII = 0.96); relationship between level of compliance to good sanitation measures and accident rate is not significant; and provision of Personal Protective Equipment is the most effective strategy for minimising rate of accidents (MIS = 4.95). It was concluded that the effect of site sanitation on safety performance of workers on construction sites in Minna is not significant. It was thus recommended that construction firms should always comply with the measures for enhancing good sanitation on sites, especially “Provision of drinking water”, in order to improve safety performance on site.</p> <p><strong>Key words:</strong> Construction, Safety, Sanitation, Performance, Workers.</p> Abdullateef Adewale Shittua Hawwa Ibrahim Ahmadb Alhassan Mohammed Isahc Mohammed Ndagi Mohammedd Copyright (c) 2021-03-12 2021-03-12 16 1 61 68 10.4314/njtr.v16i1.9 Development of a design framework for the promotion of African Arts and Crafts on an E-Commerce platform <p>This paper enunciates the impact of e-commerce in redefining contemporary buying and selling globally. The paper articulates the importance of high internet penetration to consumers embrace of e-commerce in enhancing the growth of Africa emerging markets. The potentials of e-commerce provide an enabling opportunity for the promotion and sale of African arts and crafts within Africa and globally. Apparently, the originality and richness of African arts and crafts resonates functionality and desirability of the works. Therefore, this paper developed a framework for the development and implementation of an e-commerce platform specifically built for the promotion of African arts and crafts. The developed framework is anchored on three dimensions namely web design graphics, user experience and web advertisements. Components of web design graphics include visual weight, colour psychology, page layout and photography. User Experience is categorized into graphic user interface, navigation, ergonomics, design and implementation, web development languages, e-commerce enterprise framework and search engine optimization. The web advertisement components are content marketing, social media, public relation and social marketing.</p> <p><strong>Keyword:</strong> E-commerce Visual Weight Colour Psychology Page Layout User Experience</p> Afeez Babatunde Siyanbola Copyright (c) 2021-03-12 2021-03-12 16 1 69 76 10.4314/njtr.v16i1.10 Impact of Communication Management on the Delivery of Construction Projects in Abuja, Nigeria <p>Studies have attributed project failure to poor communication management. This research assessed the impact of communication management on the delivery of construction projects in Abuja, with a view to proposing strategies for improving communication management. The quantitative research method was adopted for the study. Data collection was done through questionnaire survey. Analysis of data was carried out using Mean Item Score (MIS) and Relation Importance Index (RII). Results of the study revealed that the most important causes of poor communication management on construction projects range from Poor feedback (RII = 0.89) to Lack of training (RII = 0.82). The influence of communication management on the cost (MIS = 3.80-4.55), time (MIS = 3.83-4.50) and quality (MIS = 3.53-4.25) delivery of construction projects is significant. Based on these findings, it was concluded that the impact of communication management on the delivery of construction projects in Abuja is significant. It was recommended that project managers should avoid the major causes of poor communication management which range from “Ineffective communication channel used” to “Lack of training” in order to minimise potential dispute, misunderstanding and project failures as a result of poor management of communication on project sites.</p> <p><strong>Keywords:</strong> Communication, Communication Management, Construction Projects, Cost. Quality, Time.</p> Abdullateef Adewale Shittu Mercy Oiseruimen Evborokhai Abel John Tsado Copyright (c) 2021-03-12 2021-03-12 16 1 77 88 10.4314/njtr.v16i1.11