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Prolonging the shelf life of ‘Agege Sweet’ orange with chitosan–rhamnolipid coating
Charles Oluwaseun Adetunji,Isaac Oluseun Adejumo,Israel Sunmola Afolabi,Juliana Bunmi Adetunji,Emmanuel Sunday Ajisejiri 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.5
This study evaluates the single and combined usage of chitosan (2% w/v) and rhamnolipid (2% w/v) as edible coatings to extend the shelf life of sweet oranges stored at 25 °C for 8 weeks. Physiochemical, microbial and sensory analysis of the oranges was conducted during ambient storage. The combined treatment of chitosan and rhamnolipid coating on oranges significantly delayed a loss in chlorophyll quality, malondialdehyde, weight loss, soluble solids content, titratable acidity, vitamin C content and delayed the loss of firmness during the 8 weeks of storage. The combined chitosan–rhamnolipid coating significantly increased the activities of superoxide dismutase, catalase, and peroxidase, as well as inhibited the generation of superoxide free radicals and the growth of mesophilic bacteria, yeast and mould.
Adetunji Ajibola Awe,Beatrice Olutoyin Opeolu,Olalekan Siyanbola Fatoki,Olushola Sunday Ayanda,Vanessa Angela Jackson,Reinette Snyman 한국응용생명화학회 2020 Applied Biological Chemistry (Appl Biol Chem) Vol.63 No.1
The adsorption of phenanthrene onto activated carbons produced from Vitis vinifera leaf litter (a waste plant biomass) was investigated in this study. Zinc chloride ( ZnCl2) and phosphoric acid ( H3PO4) were utilised as activating agents in producing the activated carbons. The characterisation of the activated carbons was achieved with Fourier transform infrared spectroscopy (for surface functional groups), scanning electron microscopy (for surface morphology) and Brunauer–Emmett–Teller (BET) (for surface area determination). The adsorption of phenanthrene onto the activated carbons was optimised in terms of solution pH, adsorbent dosage, initial concentration of adsorbate solution and contact time. Experimental results showed that H3PO4 modified activated carbon gave better yield (up to 58.40%) relative to ZnCl2 modified activated carbon (only up to 47.08%). Meanwhile, surface characterisation showed that ZnCl2 modification resulted in higher BET surface area (up to 616.60 m2/ g) and total pore volume (up to 0.289 cm3/g) relative to BET surface area of up to 295.49 m2/ g and total pore volume of up to 0.185 cm3/g obtained from H3PO4 modified activated carbons. Adsorption equilibrium data fitted well into Freundlich isotherm model relative to other applied isotherm models, with maximum Kf value of 1.27 for ZnCl2 modified activated carbon and 1.16 Kf value for H3PO4 modified activated carbon. The maximum adsorption capacity for ZnCl2 and H3PO4 activated carbons for the removal of phenanthrene were 94.12 and 89.13 mg/g, respectively. Kinetic studies revealed that dynamic equilibrium was reached at 80 min contact time. Experimental data fitted best into the Elovich kinetic model relative to other kinetic models, based on the correlation coefficient (R2) values obtained from kinetic studies. Chemisorption was deduced as a major phenanthrene removal pathway from aqueous solution and the physicochemical characteristics of the adsorbents have major influence on phenanthrene removal efficiencies.
( Adelowo Felix Adetunji ) 삼육대학교 선교와사회문제연구소 2011 Asia-Africa Journal of Mission and Ministry(AAMM) Vol.3 No.-
One of the challenges confronted by the missionaries of the colonial era in Nigeria, was how to reach the people at the grass root through their community leaders. Those that found themselves in Yorubaland were not exempted from this challenge. In this work, two Yoruba communities namely: Iperu in the then Ijebu province and Shao in the then Ilorin province are considered. The paper examines the interactions between the Traditional Council, the Missionaries and the Colonial Administrators in the period under review. It presents the authority and roles of the traditional rulers along with the council that worked with them for the welfare of the communities. Historical and comparative approaches were employed using available records with personal experiences and observations of the writer. The author discovered that the missionaries, in their efforts to spread the gospel did not all receive similar receptions from the people. The work concludes that missionary endeavors could be challenging but God always work in mysterious ways to fulfill his purposes even, in mission.
Adelowo Felix Adetunji 삼육대학교 선교와사회문제연구소 2009 Asia-Africa Journal of Mission and Ministry(AAMM) Vol.1 No.-
To reach out to the world with the gospel is the priority of Christian mission. In order to achieve this, missionaries usually employ various strategies in their mission fields. In this paper, an attempt is made using a historical approach to present mission education and medical services as examples of tools for mission as applied to the Shao community in the defunct Ilorin Province of Nigeria. In doing this, relevant prominent individuals were interviewed to secure first-hand information. At the same time, the works of available and relevant authors were consulted. The research revealed that the Seventh-day Adventist mission chose education while the Sudan Interior Mission made use of medical work in Shao. Each of the mission organizations succeeded in using its respective strategy as a wedge in a traditional but Muslim-controlled mission station, Shao. It concludes that education and medical services are effective tools for mission.
M. ABIMBOLA OYINLOLA;M. ADETUNJI BABATUNDE 경제연구소 2009 Journal of Economic Development Vol.34 No.2
This paper examines the extent of pass-through of exchange rate into import prices for Nigeria between 1980 and 2006 using the recently developed UECM-Bounds test proposed by Pesaran et al. (2001). Empirical evidence reveals that world export prices has a dominant effect compared to exchange rate in explaining changes in Nigeria’s import prices in the short and long run. The major implication for our study therefore is that exogenous factors such as world export prices appeared to be more important determinants of domestic import prices than a country’s exchange rate policies.
M. ABIMBOLA OYINLOLA,M. ADETUNJI BABATUNDE 중앙대학교 경제연구소 2009 Journal of Economic Development Vol.34 No.2
This paper examines the extent of pass-through of exchange rate into import prices for Nigeria between 1980 and 2006 using the recently developed UECM-Bounds test proposed by Pesaran et al. (2001). Empirical evidence reveals that world export prices has a dominant effect compared to exchange rate in explaining changes in Nigeria’s import prices in the short and long run. The major implication for our study therefore is that exogenous factors such as world export prices appeared to be more important determinants of domestic import prices than a country’s exchange rate policies.
Performance of Fusarium oxysporum EKT01/02 isolate in cyanide biodegradation system
Enoch Akinbiyi Akinpelu,Adewole Tomiwa Adetunji,Seteno Karabo Obed Ntwampe,Felix Nchu,Lukhanyo Mekuto 대한환경공학회 2018 Environmental Engineering Research Vol.23 No.2
This study reports a cyanide resistant and/or tolerant fungus, isolated from the rhizosphere of Zea mays contaminated with cyanide-based pesticides. The isolate was characterised using molecular biology. The effect of free cyanide and heavy metals on the growth of isolate in a synthetic gold mine wastewater was examined. The molecular analyses identified the isolate as Fusarium oxysporum EKT01/02 (KU985430/KU985431). The isolate had a free cyanide degradation efficiency of 77.6%. The results indicated greater growth impairment in culture containing Arsenic (optical density 1.28 and 1.458) and cyanide (optical density 1.315 and 1.385). Higher growth was observed in all cultures supplemented with extracellular polymeric substance. This study showed that the isolate possesses wide substrate utilisation mechanism that could be deployed in environmental engineering applications.
Zhu Zhendong,Zhao Haolong,Yang Qitai,Li Yajing,Wang RuYuan,Adetunji Adedeji Olufemi,Min Lingjiang 아세아·태평양축산학회 2024 Animal Bioscience Vol.37 No.5
Objective: The present study aimed to investigate the effect of β-nicotinamide mononucleotide (NMN) supplementation on ram sperm quality during storage at 4°C in vitro. Methods: Tris-citric acid-glucose solution containing different doses of NMN (0, 30, 60, 90, and 120 μM) was used to dilute semen collected from rams and it was stored at 4°C. Sperm motility, plasma membrane integrity as well as acrosome integrity were evaluated at 0, 24, and 48 h time points after storage at 4°C. In addition, sperm mitochondrial activity, lipid peroxidation (LPO), malondialdehyde (MDA) content, reactive oxygen species (ROS) content, glutathione (GSH) content, superoxide dismutase (SOD) activity, and apoptosis were measured at 48 h time point after storage at 4°C. Results: Results demonstrate that the values obtained for sperm motility, acrosome integrity, and plasma membrane integrity in the NMN treatments were significantly higher than control (p<0.05). The addition of 60 μM NMN significantly improved ram sperm mitochondrial activity and reduced LPO, MDA content, and ROS content compared to control (p<0.05). Interestingly, sperm GSH content and SOD activity for the 60 μM NMN treatment were much higher than those observed for control. NMN treatment also decreased the level of Cleaved-Caspase 3, Cleaved-Caspase 9, and Bax while increasing Bcl-2 level in sperm at 48 h time point after storage at 4°C. Conclusion: Ram sperm quality can be maintained during storage at 4°C with the addition of NMN at 60 μM to the semen extender. NMN also reduces oxidative stress and apoptosis. Overall, these findings suggest that NMN is efficient in improving the viability of ram sperm during storage at 4°C in vitro.