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Rowland Monday Ojo Kayode Anthony Jide Afolayan 《Journal of Zhejiang University. Science. B》2015,16(8):680-689
Renewed interest in natural materials as food flavors and preservatives has led to the search for suitable essential oils. Moringa oleifera seed essential oil was extracted by solvent-free microwave and hydrodistillation. This study assessed its chemical constituents. Cytotoxicity of the oils was investigated using hatchability and lethality tests on brine shrimps. A total of 16 and 26 compounds were isolated from the hydrodistillation extraction (HDE) and solvent-free microwave extraction (SME) oils, respectively, which accounted for 97.515% and 97.816% of total identifiable constituents, respectively. At 24 h when the most eggs had hatched, values of the SME (56.7%) and HDE (60.0%) oils were significantly different (P<0.05) from those of sea water (63.3%) and chloramphenicol (15.0%). Larva lethality was different significantly (P<0.05) between HDE and SME oils at different concentrations and incubation periods. The median lethal concentration (LC50) of the oils was >1000 mg/ml recommended as an index for non-toxicity, which gives the oil advantage over some antioxidant, antimicrobial, therapeutic, and preservative chemicals. 相似文献
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Tokunbo Ojo 《Soccer & Society》2018,19(2):222-235
Historically, sports journalists have been the ones who predominately shape and define dominant narrative discourse of local and global sports. But, with the advent of social media and internet technologies, this is no longer the case. The digital media technologies now allow athletes, fans and sports organizations to impose their own narrative frames on sporting events in the real time. This has changed the tenor and tone of sport communication. With Shooting Stars Sports club of Ibadan, a legendary and pacesetter football club in Nigeria, as its case study, this paper examines why and how football clubs are appropriating social media and web technologies for information dissemination and live match commentaries in the Nigerian context. 相似文献
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Moisés de Hoyo Daniel Dylan Cohen Borja Sañudo Luis Carrasco Alejandro Álvarez-Mesa Juan José del Ojo 《Journal of sports sciences》2016,34(14):1363-1370
ABSTRACTWe analysed the time course of recovery of creatine kinase (CK) and countermovement jump (CMJ) parameters after a football match, and correlations between changes in these variables and match time–motion parameters (GPS-accelerometry) in 15 U-19 elite male players. Plasma CK and CMJ height (CMJH), average concentric force (CMJCON) and average eccentric force (CMJECC) were assessed 2 h before and 30 min, 24 h and 48 h post-match. There were substantially higher CK levels 30 min, 24 h and 48 h (ES: 0.43, 0.62, 0.40, respectively), post-match. CMJECC (ES: ?0.38), CMJH (ES: ?0.35) decreased 30 min post, CMJCON (ES: ?0.35), CMJECC (ES: ?0.35) and CMJH (ES: ?1.35) decreased 24 h post, and CMJCON (ES: ?0.41) and CMJH (ES: ?0.53) decreased 48 h post. We found correlations between distance covered at velocities ≤21 km · h?1 and changes in CK at 24 h (r = 0.56) and at 48 h (r = 0.54) and correlations between CK and distance covered >14 km · h?1 (r = 0.50), accelerations (r = 0.48), and decelerations (r = 0.58) at 48 h. Changes in CMJCON 30 min and 24 h post (both r = ?0.68) correlated with impacts >7.1·G. Decelerations >2 m · s?2 correlated with changes CMJCON (r = ?0.49) at 48 h and CMJECC (r = ?0.47) at 30 min. Our results suggest that match GPS-accelerometry parameters may predict muscle damage and changes in components of neuromuscular performance immediately and 24–48 h post-match. 相似文献
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The impact of mobile technology on governance and development has attracted significant interest in Information and Communication Technology (ICT) for Development and Electronic Governance communities. There is growing consensus that governance mechanisms must complement access to technology to achieve greater impact on development. However, few or no rigorous research exists to show how such mechanisms can support the delivery of mobile services to vulnerable groups. This study fills this important gap by first providing a conceptual framework, based on the Choice Framework and the Structuration Theory, to elaborate on the relationship between ICT, governance and citizen capabilities. Second, the framework is applied to analyze livelihood needs of 45 women head porters interviewed in Accra. Third, as all women under study have access to mobile phones, we determine which governance mechanisms are needed to support the delivery of mobile services to them. Results show that three governance mechanisms enable the contribution of mobile technology to meeting the livelihood needs of this group: 1) updating financial and telecommunication regulations to enable the provision of mobile-based services e.g. mobile microfinance, to vulnerable groups; 2) mobilizing local communities in the production of local contents; and 3) engaging non-governmental organizations in building capacity of government agencies in mobile service delivery and in training vulnerable communities in effective use of mobile technology to access information and services critical to their needs. We conclude by discussing the use of the Structuration Theory along with the Choice Framework to shape development processes based on citizen needs and by discussing the applicability of our framework to similar vulnerable groups. 相似文献
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Reuben Abiodun Ojo Dauda Olayinka Ayanda 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2013,23(5):223-234
This article examines the practical ways of handling Internet connectivity challenges in a typical university academic library setting in Nigeria, using Kenneth Dike Library (KDL), University of Ibadan, as a case study. Both internal and external factors are responsible for the challenges being experienced in terms of Internet connectivity in KDL. The current state of Internet connectivity within the KDL is presented. Also discussed are an overview of the previous model of Local Area Network (LAN) within the KDL, the challenges associated with the previous model, an overview of the new LAN model and discussion/way forward. Finally, conclusion and recommendations are presented. 相似文献
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Antibacterial potency of methanol extracts of three green lower plants, Pneumatopteris afra, Platycerium bifurcatum and Nephrolepsis bisserata was determined using agar dilution method on clinical strains of Escherichia coli, Staphylococcus aureus, Klebsiella spp. and Salmomelia typhi. Antibacterial activities were observed at concentrations of 12.5, 25.0, 50.0 and 100.0 μg/ml. Their minimum inhibitory concentrations ranged from 12.5~100 μg/ml. Extracts of P. afra and P. bifurcatum were most active. Antibacterial activities observed with N. bisserata were less pronounced with no detectable activity at extract con-centrations of 12.5 and 25.0 μg/ml. E. coli, together with S. aureus appeared to be the most susceptible of the test bacteria while Klebsiella spp. was least sensitive. The significance of our findings is discussed. 相似文献
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Emmanuel Babatunde Ajala Reuben Abiodun Ojo 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2013,23(4):199-205
New information communication technologies, such as the Internet and electronic publishing, not only enhance the range of publications that libraries can provide for their users but also increase the speed with which such requests can be met. This article describes the development of electronic document delivery (EDD) at the Kenneth Dike Library at the University of Ibadan, Nigeria. A successful EDD program depends upon good intranet and Internet network systems, document availability, user awareness and training, and ease of use. The major challenge to this service is inconsistent power supply, which the university is addressing with the aid of a grant from the MacArthur Foundation for backup electric generators and a university solar energy project. It is hoped that this will assure better and more reliable power service in support of EDD in future. New information delivery regulations and laws guiding adequate service will also emerge but must be properly applied for effective and positive results. 相似文献
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Helen Komolafe-Opadeji Reuben Abiodun Ojo 《International Information and Library Review》2019,51(2):194-201
This article reports on a survey study on the adoption and implementation of automation projects in federal university libraries in the south-west of Nigeria (SWN). The objectives are to ascertain the implementation status of automation projects, discuss the accruable benefits, investigate the library management system software being used, determine the modules already activated and fully implemented and their web presence, highlight the challenges encountered, draw conclusions and recommendations on enhancing successful implementation of library automation projects in Nigeria. The method used for gathering data for the study is questionnaire-based survey, using google form template. The findings of the study are that all the six federal university libraries in the SWN have adopted and implemented automation; two out of them are using open source integrated library automation software (Koha), one library uses in-house built integrated library system (ILS), while the remaining three use different proprietary software for their automation projects; and all the ILSs being used for automation projects are interoperable. The conclusion from the study is that the effective performance of libraries lies in the ability to access research materials and other relevant information contents with remarkable ease. This becomes achievable when libraries adopt and implement automation in their respective domains. 相似文献
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