• Anilinolysis of nitro‐substituted diphenyl ethers in acetonitrile: The effect of some ortho‐substituents on the mechanism of SNAr reactions 

  Isanbor, C.; Emokpae, T.A. (Wiley, 2009-11-11)

  Rate data are reported for the reactions of a series of X‐phenyl 2,4,6‐trinitrophenyl ethers 1a–e[X = H, 4‐NO2, 2‐NO2, 2,4‐(NO2)2, or 2,6‐(NO2)2] with substituted anilines 2a–e [Y = H, 2‐CH3, 2,4‐(CH3)2, 2,6‐(CH3)2, or ...

• Comparative Study of the Chemical Profiles of the Essential Oils of Ripe and Rotten Fruits of Citrus Aurantifolia Swingle. 

  Afolayan, A.J.; Asekun, O.T. (Natural product communications, 2008-06-03)

  Most often during the processing of lime fruits for essential oil extraction, rotten fruits are used along with ripe ones. In this study, we examine the volatile constituents of the essential oils from both ripe and rotten ...

• Polymer Molecular Weight Analysis by 1H NMR Spectroscopy 

  Izunobi, J. U.; Higginbotham, C. L. (2011)

  The measurement and analysis of molecular weight and molecular weight distribution remain matters of fundamental importance for the characterization and physical properties of polymers. Gel permeation chromatography (GPC) ...

• Volatile Components from the Roots of Solanum pseudocapsicum 

  Aliero, A.A.; Asekun, O.T.; Grierson, D.S.; Afolayan, A.J. (2007-05-01)

  The volatile components obtained by hydrodistillation of Solanum pseudocapsicum roots were analyzed by gas chromatography-mass spectrometry. A total of 41 compounds, representing 50% of the oil, were identified. The oil ...

• Constituents of the leaf essential oil of Cedrela odorata L. from Nigeria 

  Asekun, O.T.; Ekundayo, O. (John wiley and sons, 1999-06-30)

  The essential oil composition of Cedrela odorata L. leaves was comprehensively investigated by means of capillary GC and GC±MS. Twenty-six constituents were identified in the volatile oil. Sesquiterpenoids such as a-santalene ...

• Characterization of Essential Oils from Helichrysum odoratissimum Using Different Drying Methods 

  Asekun, O.T.; Grierson, D.S.; Afolayan, A.J. (2007)

  Helichrysum odoratissimum is one of the most commonly used medicinal plants in South Africa. The essential oil from the herb was extracted and characterized for the first time using different drying methods. The oils ...

• Essential Oil Constituents of Hyptis suaveolens (L.) Poit. (Bush Tea) Leaves from Nigeria 

  Asekun, O.T.; Ekundayo, O. (Taylor and Francis, 2000)

  The essential oil of the leaves of Hyptis suaveolens (L.) Poit. from Nigeria was isolated by hydrodistillation. The oil was analyzed by GC and GC/MS. Of the 49 components which were detected, 39 amounting to 89.5% were ...

• Antimicrobial and cytotoxic activities of the fruit essential oil of Xylopia aethiopica from Nigeria. 

  Asekun, O.T.; Adeniyi, B.A. (Elsevier, 2004)

  The fruits essential oil of Xylopia aethiopica showed activity against four microorganisms and cytotoxicity to carcinoma cells (Hep-2 cell line) at 5 mgyml concentration.

• The effects of drying on the chemical components of essential oils of Calendula officinalis L. 

  Okoh, O.O.; Sadimenko, A.P.; Asekun, O.T.; Afolayan, A.J. (African journals online, 2008-02-22)

  Calendula officinalis is a medicinal plant whose essential oils are used for various purposes. The oils were extracted by hydrodistillation from fresh leaves, dry leaves and fresh flowers of the herb yielding 0.06, 0.03 ...

• Composition and Antioxidant Activities of Leaf and Root Volatile Oils of Morinda lucida 

  Okoh, S.O.; Asekun, O.T.; Familoni, O.B.; Afolayan, A.J. (2011-06-18)

  Morinda lucida (L.) Benth. (Rubiacae) is used in traditional medicine in many West African countries for the treatment of various human diseases. The leaves and roots of this plant were subjected to hydrodistillation to ...

• Determination of toxic metal concentrations in flame-treated meat products, ponmo 

  Okiei, W.O.; Ogunlesi, M.; Alabi, F.; Osiughwu, B.; Sojinrin, A. (African Journal of Biochemistry, 2009-09-14)

  Cowhides lsquo;ponmorsquo; prepared by various and unknown processing methods were purchased from several markets in Lagos and environs and the contents of lead, cadmium, chromium, zinc, mercury and arsenic were determined ...

• Mechanical Properties and In Vitro Physico-chemical Reactivity of Gel-derived SiO2–Na2O–CaO–P2O5 Glass from Sand 

  Adams, L. A.; Essien, E. R.; Igbari, F. O. (Wiley-VCH Verlag GmbH & Co., 2016)

  In the present report, a bioactive glass was synthesized from silica sand as economic substitute to alkoxy silane reagents. Sodium metasilicate (Na2SiO3) obtained from the sand was hydrolyzed and gelled using appropriate ...

• Preparation of Mg–Zn bimetallic doped Na-containing bioceramic from sodium metasilicate 

  Adams, L. A.; Essien, E. R. (Springer, 2016)

  Glass–ceramic materials in the composition (mol%) 23.5 Na2O–23.5CaO–xMgO–xZnO–47SiO2–(6-2x) P2O5 (x = 0 and 1.5) were prepared by the sol–gel technique using sodium metasilicate (Na2SiO3) as source of Na2O and SiO2. ...

• Bioactive glass 45S5 from diatom biosilica 

  Adams, L. A.; Essien, E. R.; Adesalu, A. T.; Julius, M. L. (Elsevier, 2017)

  A major draw-back to large scale production of bioactive glasses is the high cost of the standard silica precursor, usually tetraethyl orthosilicate (TEOS). The current study describes a novel sol-gel preparation of 45S5 ...

• Bioactivity of quaternary glass prepared from bentonite clay 

  Adams, L. A.; Essien, E. R. (Springer, 2016)

  Alkoxysilane precursors are the most widely used silica source for sol–gel preparation of silicate-based bioactive glass. However, due to their high cost, alternative sources such as bentonite clay are desirable. In the ...

• Optical and Structural Properties of Solution Grown CuNiS Thin Films Using Various Complexing Agents 

  Igbari, F.; Olopade, M.; Adams, L.; Odudu, H; Folorunsho, F (ICTP, 2015)

  Copper Nickel Sulphide (CuNiS) thin films were deposited on glass substrate by the solution growth deposition technique (SGT). The suitability of some five complexing agents (EDTA, citric acid, tartaric acid, ammonia, and ...

• Microwave-Assisted Solvent-Free Arylation of Amino acids with Halogenobenzenes 

  Sowole, M. A.; Adebisi, A. B.; Olasupo, I. A.; Izunobi, J. U.; Familoni, O. B. (2018)

  The solventless microwave-assisted arylation and heteroarylation of different aliphatic and cyclic amino acids 2a􀂱e were carried out on activated, substituted o-nitrohalogenobenzenes 1a􀂱h and 2-chloro-3-nitropyridine 1i, ...

• Sorption of Heavy Metals from Elecroplating Effluents by Low-Cost Adsorbents II: Use of Waste Tea, Coconut Shell and Coconut Husk 

  Olayinka, K. O.; Adu, T.; Alo, B. I. (ANSInet, 2007-12)

  Present research focuses on the use of waste tea, coconut shell and coconut husk as potential low-cost adsorbents for removal of heavy metals chromium (Cr), zinc (Zn) and nickel (Ni)) from three different electroplating ...

• Phytoconstituents, Proximate and Mineral Investigations of the Ethanol Extracts of the Bark and Leaves of Ficus sur Forssk. 

  Odusami, J. A.; Asekunowo, A. K.; Izunobi, J. U.; Ekarica, E. A.; Asekun, O. T.; Familoni, O. B. (2017)

  Qualitative phytochemical screening and nutritional compositions of the leaves and bark of Ficus sur Forssk. (Moraceae), a Nigerian plant with medicinal potentials, was carried out using standard methods. The phytochemical ...

• Development of a slurry technique for the determination of cadmium in dried foods by electrothermal atomisation atomic absorption spectrometry 

  Olayinka, K. O.; Haswell, S. J.; Greszkowiak, R. (pubs.rsc.org, 1986-08)

  A method is described for the the determination of cadmium in foods by atomic absorption spectrometry with direct slurry introduction into an electrothermal atomiser. Oxygen infusion facilitates in situ ashing of samples ...

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