Ibrahim Sulyman Olalekan

@unilorin.edu.ng

Lecturer, Faculty of Physical Sciences
Assistant Professor, Faculty of Physical Sciences
University of Ilorin

EDUCATION

(1) University of Ilorin, Ilorin, Nigeria 2017 – 2023
(2) University of Ilorin, Ilorin, Nigeria 2014 – 2017
(3) University of Ilorin, Ilorin, Nigeria 2008 – 2012

RESEARCH, TEACHING, or OTHER INTERESTS

Organic Chemistry, Spectroscopy, Chemistry, Food Science

Scopus Publications

217

Scholar Citations

Scholar h-index

Scholar i10-index

Scopus Publications

Chemical Characterization, Cytotoxicity, Anti-inflammatory, Antioxidant, Antimicrobial and Anti-toxoplasmosis of Chrysophyllum albidum Seed Oil

Characterization, Chemical Composition and Cream Formulation from the Seed Butter of Mangifera indica L.

Synthesis and Chemical Characterization of Alkyd Resins Using Maleic and Phthalic Anhydrides and Seed Oil of Luffa aegyptiaca
Marili Funmilayo ZUBAİR, Sulyman Olalekan IBRAHİM, Kenneth STEPHEN, Abdulmumeen Amao HAMİD, Olamilekan IBUKUN, and Olubunmi ATOLANİ
The Turkish Chemical Society
The study aimed to provide sustainable alternatives to reduce industries’ over-reliance on edible vegetable oil for alkyd resin preparation as applicable in paint production. Alkyd resins were synthesized and characterized from sponge (Luffa aegyptiaca) seed oil. Condensation polymerization of monoglyceride with phthalic and maleic anhydride was carried out, and physico-chemical parameters such as drying time, total solids, viscosity, and chemical resistance were investigated following standard procedures. UV–visible, FT-IR, 1H, and 13C NMR spectroscopies were used to characterize the prepared alkyd resins. Sponge seed oil alkyd resins prepared with maleic anhydride (SPOMA) had a higher percentage yield (77.56%) than sponge seed oil prepared using phthalic anhydride (SPOPA) with 64.44%. The two alkyd resins showed a better drying time of 40 – 50 min than their commercial counterparts (70 min). This was attributed to the high degree of unsaturation of the seed oil due to the considerable proportion of linoleic acid in the seed oil. The alkyd resins were largely stable in 0.1 M HCl, 5% NaCl, and 0.1 M KOH, which caused the alkyd resins to whiten and shrink. The resins were generally soluble in xylene, kerosene, and petroleum ether. The nature of the alkyd resin can be described as nonpolar. This observation was consistent with the literature report. This study concluded that quality or industrial-grade alkyd resins could be prepared from sponge seed oil and thereby serve as a cheap and viable replacement for edible oils used in industries.

Gas Chromatography-Mass Spectrometric analysis and antioxidant property of leaf extracts of Chamaecrista rotundifolia
A. A. Hamid, A. Shehu, M. I. Bale, Umar. Idris, S. B. Issa, M.F. Zubair, S. O. Ibrahim, Y. T. Yakub, A.R. Abdulsalam, F. O. Adefila,et al.
African Journals Online (AJOL)
Chamaerista rotundifolia is a medicinal plant whose leaves are useful for the treatment of many diseases including cancer, diarrohea and pain. This plant is underexploited in the area of extraction and bioassays that will establish its efficacy. The aim of the present study is to determine the antibacterial and antioxidant properties as well as to analyze the chemical compositions of the extracts from the plant leaves through the use of Gas chromatography – Mass Spectrometry (GC- MS) technique. The antibacterial activity of n-hexane, chloroform, ethyl acetate, and methanol extracts of the plant was tested against six (6) strains of bacteria named Pseudominas aeruginosa, Staphylococcus aerus, Klebsiella pneumoniae, Acinetobacter baumannii, Enterococcus faecalis, and Escherichia coli. The extracts of the plant exhibited no significant antibacterial property on the tested organisms. The result of antioxidant activity (using 1,1-diphenyl-2-picryl hydrazy (DPPH) radical scavenging) revealed that Chamaecrista rotundifolia ethyl acetate extract has low antioxidant properties due to its high (>1164.878), and negative (< 0) Inhibition Concentration at 50% values for antioxidant. However, the methanol extract exhibited antioxidant activity with an IC50 value of 5 μg/mL, which is comparable to that of ascorbic acid, 2.55 μg/mL. The GC-MS results of this extract showed that it contains some bioactive compounds. Meanwhile, the ethyl acetate extract of the plant contains 75 chemical compounds, 4 of which are principal constituents, 6 are minor and others are trace. The chloroform extract of C. rotundifolia leaf was, however, inactive in inhibiting the growth of the bacteria as the extract also had a high inhibition value when compared with the inhibition concentration at 50%, which shows its low level of antioxidant activity. Our results of antibacterial activity were found not promising while the antioxidant activity on its own showed an interesting result that could be useful in the prevention of oxidative stress side effects and cancer related diseases.

Influence of dietary Plukenetia conophora seed on growth performance, hepatic antioxidant status, blood chemistry, fillet quality, fatty acid, and oxidative stability of Clarias gariepinus
Kazeem D. Adeyemi, Oluwaseun O. Oludemokun, Marili F. Zubair, Olubunmi Atolani, and Sulyman O. Ibrahim
Elsevier BV

Chemical Characterization, Preparation of Biosurfactant and Biochemical Evaluation of Seed Oil of Luffa aegyptiaca

Influence of dietary supplementation of kigelia pinnata and plukenetia conophora leaves on cytokine expression, immunoglobulins, blood chemistry, caecal microbiota and meat quality in broiler chickens
K. Adeyemi, M. Adegoke, MO Mudashir, FM Owoyomi, T. Hamzat, IA Adeleke, S. Ibrahi̇m and A. Abdulrahman

This study examined the effect of dietary supplementation of Kigelia pinnata (KPL) and Plukenetia conophora (PCL) leaves in comparison with oxytetracycline (OXY) and butylated hydroxyanisole (BHA) on growth performance, selected blood biochemical parameters, caecal microbiota, splenic interleukins (IL), serum immunoglobulins (Ig), carcass traits, meat quality, and oxidative stability in broiler chickens. One day old Arbor Acres chicks (n=420) were randomly assigned to either basal diet only (BD); basal diet + 0.5 g/kg oxytetracycline + 0.12 g/kg BHA (OXYBHA); basal diet + 1 g/kg KPL (KPL-1); basal diet + 2 g/kg KPL (KPL-2); basal diet + 1 g/kg PCL (PCL-1); or basal diet + 2 g/kg PCL (PCL-2) for 42 d. Each dietary treatment had seven replicates with 10 chicks per replicate. Supplemented birds gained (P < 0.05) more weight and had a better feed conversion ratio compared with the BD birds. Hematological indices, IL-1β, and IL-6 did not differ among the treatments. BD birds had lower (P < 0.05) carcass weight and IL-10, and higher (P < 0.05) IgG, IgM, Salmonella spp., and E. coli counts than the supplemented birds. The KPL-2 birds had the least (P < 0.05) E. coli and Salmonella spp. counts and IgM among the supplemented birds. Lactobacillus spp. count was lower (P < 0.05) in OXYBHA birds compared with KPL and PCL birds. Carbonyl and malondialdehyde contents in the Sartorius muscle, and drip loss and carbonyl content in the Pectoralis muscle of the BD birds were higher (P < 0.05) than those of the supplemented birds. These results illustrate that the 2 g/kg KPL and 2 g/kg PCL could be used as an antioxidant and an antimicrobial in the diets of broiler chickens.

Dietary Supplementation of Tetracarpidium conophorum (African Walnut) Seed Enhances Muscle n-3 Fatty Acids in Broiler Chickens
Kazeem D. Adeyemi, Abdulraheem Abdulrahman, Sulyman O. Ibrahim, Marili F. Zubair, Olubunmi Atolani, and Abdulhammed A. Badmos
Wiley

Chemical and biological evaluations of potent antiseptic cosmetic products obtained from Momordica charantia seed oil
Marili Funmilayo Zubair, Olubunmi Atolani, Sulyman Olalekan Ibrahim, Olubunmi Stephen Oguntoye, Halimat Amin Abdulrahim, Rukayat Abiodun Oyegoke, and Gabriel Ademola Olatunji
Elsevier BV

Fatty acids composition, antimicrobial potential and cosmeceutical utilization of prosopis africana seed oil
Marili Funmilayo Zubair, Olubunmi Atolani, Sulyman Olalekan Ibrahim, Olubunmi Stephen Oguntoye, Rukayat Abiodun Oyegoke, and Gabriel Ademola Olatunji
Sociedad Quimica de Mexico, A.C.
Abstract. The physicochemical properties, fatty acids profile, antimicrobial activity and soap potential of the seed oil of Prosopis africana were examined. The prepared natural antiseptic soap was absolutely devoid of all forms of synthetics such as alkaline, antimicrobial agents, preservatives, colourants and fragrances. The seed had an oil yield of 4.98% while the saponification, acid, free fatty-acids and iodine values were found to be 11.60 ± 0.54 mgKOH/g, 16.96 ± 0.57 mgKOH/g, 14.60 ± 0.45% oleic and 145.47 ± 0.66 I2 100 g-1 of the oil respectively. The GC-MS result of the prepared fatty acid methyl ester (FAMEs) indicated the presence of oleic acid (33.67%), a monounsaturated fatty acid as the most prominent fatty acid in the oil, followed linoleic acid (18:2), a polyunsaturated acid making up 31.92% of the oil. Palmitic acid (24.96%) is the most abundant saturated fatty acid while stearic acid and valeric acid makes up (7.3%) and (1.96%) respectively. The antimicrobial activity of the oil tested against ten strains of organisms which include: Streptococcus aureus, Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa, Salmonella typhi, Klebsiella pneumoniae, Candida albicans, Penicillium notatum, Rhijoptius stoloniter and Aspergillus niger showed good activity. The Minimum Inhibition Concentration (MIC) values obtained for the oils ranges from 31.25 to 125 mg/mL against all the test organisms and within the range 0.125- 0.5 mg/mL for the prepared soap. The physicochemical analysis of the P. africana soap was comparable to commercial antiseptic soaps. The result indicated that quality renewable natural antiseptic soaps ccould be obtained from P. africana seed oil. The result confirms that soaps made from natural lye (alkaline solution) has the capacity to replace existing commercial antiseptic soaps made of synthetic sodium or potassium hydroxides, antimicrobial agents, artificial preservatives and colourants which partly accounts for environmental pollution, increase in antimicrobial resistance and endocrine disruption. The adoption of this green antiseptic soap synthesis technique utilising underexplored P. africana seed oil can help mitigate the negative environmental impact of non-biodegradable synthetic reagents. Resumen. Se examinaron las propiedades fisicoquímicas, el perfil de ácidos grasos, la actividad antimicrobiana y el potencial de jabón de la semilla de aceite de Prosopis africana. El jabón antiséptico natural preparado carecía absolutamente de todas las formas de sintéticos tales como agentes alcalinos, antimicrobianos, conservantes, colorantes y fragancias. La semilla tuvo un rendimiento de aceite de 4.98%, mientras que los valores de saponificación, ácido, ácidos grasos libres y yodo fueron 11.60 ± 0.54 mgKOH / g, 16.96 ± 0.57 mgKOH / g, 14.60 ± 0.45% oleico y 145.47 ± 0.66 I2 100 g-1 del aceite respectivamente. El resultado de GC-MS del metil éster de ácido graso preparado (FAME) indicó la presencia de ácido oleico (33,67%), un ácido graso monoinsaturado como el ácido graso más prominente en el aceite, seguido del ácido linoleico (18: 2), Ácido poliinsaturado que constituye el 31,92% del aceite. El ácido palmítico (24,96%) es el ácido graso saturado más abundante, mientras que el ácido esteárico y el ácido valérico constituyen (7,3%) y (1,96%) respectivamente. La actividad antimicrobiana del aceite analizada contra diez cepas de organismos que incluyen: Streptococcus aureus, Escherichia coli, Bacillus subtilis, Pseudomonas aeruginosa, Salmonella typhi, Klebsiella pneumoniae, Candida albicans, Penicillium notatum, Rhijoptius st. Los valores de Concentración de inhibición mínima (CIM) obtenidos para los aceites varían de 31.25 a 125 mg / ml frente a todos los organismos de prueba y se encuentran dentro del rango de 0,125 a 0,5 mg / ml para el jabón preparado. El análisis fisicoquímico del jabón de P. africana fue comparable al de los jabones antisépticos comerciales. El resultado indicó que se podrían obtener jabones antisépticos naturales renovables de calidad a partir del aceite de semilla de P. africana. El resultado confirma que los jabones hechos de lejía natural (solución alcalina) tienen la capacidad de reemplazar los jabones antisépticos comerciales existentes hechos de hidróxidos de sodio o potasio sintéticos, agentes antimicrobianos, conservantes artificiales y colorantes que en parte representan la contaminación ambiental, el aumento de la resistencia antimicrobiana y la endocrina. ruptura. La adopción de esta técnica de síntesis de jabón antiséptico verde que utiliza aceite de semilla de P. africana poco explorada puede ayudar a mitigar el impacto ambiental negativo de los reactivos sintéticos no biodegradables.

Green synthesis and characterisation of natural antiseptic soaps from the oils of underutilised tropical seed
Olubunmi Atolani, Elizabeth Temitope Olabiyi, Abdullateef Abiodun Issa, Hidiat Taiwo Azeez, Ehi Gift Onoja, Sulyman Olalekan Ibrahim, Marili Funmilayo Zubair, Olubunmi Stephen Oguntoye, and Gabriel Ademola Olatunji
Elsevier BV

RECENT SCHOLAR PUBLICATIONS

De novo in silico screening of natural products for antidiabetic drug discovery: ADMET profiling, molecular docking, and molecular dynamics simulations
SO Ibrahim, YO Ayipo, HY Lukman, FA Abubakar, A Na’Allah, ...
In Silico Pharmacology 13 (1), 29 2025

Investigation of Aframomum melegueta compounds as ERK5 inhibitor related to breast cancer via molecular docking and dynamic simulation
PO Ottu, OO Babalola, C Oluwamodupe, AF Oluwatobiloba, IO Kehinde, ...
In Silico Pharmacology 13 (1), 18 2025

In Silico Medicinal and Pharmacological Evaluation of Phytochemical Constituents from the Root Bark Extract of Enantia Chlorantha as Potential Antimalarial Drugs
S Ibrahim, H Lukman, Y Ayipo, H Babamale, F Abdulkadir, A Hamid, ...
Journal of Pure & Applied Sciences 23 (2), 178-188 2024

Preparation and Characterization of Biodegradable Diethanolamide Surfactant from Cotton Seed Oil
FR Abdulkadir, OO Oluwaniyi, SO Ibrahim, MO Ameen, KS Jubril
Ilorin Journal of Science 11 (3), 397-402 2024

Chemical Characterization, Cytotoxicity, Anti-inflammatory, Antioxidant, Antimicrobial and Anti-toxoplasmosis of Chrysophyllum albidum Seed Oil.
O Atolani, ET Areh, OS Oguntoye, MF Zubair, OS Adeyemi, OA Owolodun, ...
Chemist 95 (1) 2024

Characterization, Chemical Composition and Cream Formulation from the Seed Butter of Mangifera indica L.
AJ Aliyua, SO Ibrahimb, K Abdulmumeena, O Atolania
The Chemist, 70 2024

Chemoinformatic-aided Antidiabetic Analysis of the Therapeutic Potential of Phytoconstituents in Eremomastax speciosa Extracts
SO Ibrahim, HY Lukman, IE Ebhohimen, HF Babamale, FR Abdulkadir, ...
Borneo Journal of Pharmacy 7 (2), 172-186 2024

Nanoparticles as Antioxidant Agents: A Comprehensive Review
SO Ibrahim, HY Lukman, FR Abdulkadir, MY Bello, YO Ayipo, ...
Al-Bahir Journal for Engineering and Pure Sciences 5 (1), 3 2024

An Insight into the Physicochemical, Drug-likeness, Pharmacokinetics and Toxicity Profile of Kigelia africana (Lam) Bioactive Compounds
SO Ibrahim, HY Lukman, MF Zubair, OT Amusan, FR Abdulkadri, B Lawal, ...
Al-Bahir Journal for Engineering and Pure Sciences 4 (1), 4 2024

Gas Chromatography-Mass Spectrometric analysis and antioxidant property of leaf extracts of Chamaecrista rotundifolia
AA Hamid, A Shehu, MI Bale, U Idris, SB Issa, MF Zubair, SO Ibrahim, ...
Journal of Phytomedicine and Therapeutics 22 (1), 1101-1115 2023

Synthesis and chemical characterization of alkyd resins using maleic and phthalic anhydrides and seed oil of Luffa aegyptiaca
MF Zubair, SO Ibrahim, K Stephen, AA Hamid, O Ibukun, O Atolani
Journal of the Turkish Chemical Society Section A: Chemistry 10 (3), 689-702 2023

Influence of dietary Plukenetia conophora seed on growth performance, hepatic antioxidant status, blood chemistry, fillet quality, fatty acid, and oxidative stability of
KD Adeyemi, OO Oludemokun, MF Zubair, O Atolani, SO Ibrahim
Animal Feed Science and Technology 288, 115298 2022

Chemical Characterization, Preparation of Biosurfactant and Biochemical Evaluation of Seed Oil of Luffa aegyptiaca.
MF Zubair, SO Ibrahim, O Atolani, AA Hamid, OJ Ibukun, HA Abdulrahim
Chemist 93 (1) 2022

Nutrient Intake and Digestibility by Uda Ram Lambs Fed Maize Cobs Ensiled with Soybean and Poultry Litter
MM Mikailu, KM Aljameel, SA Maigandi, F Abubakar, S Ibrahim, ...
Nigerian Journal of Animal Production, 1552-1555 2022

Fatty-acid Composition, Physicochemical Analysis and Biological Potential of Underutilized seed of Leucaena leucocephala
MF Zubair, SO Ibrahim, O Atolani, AA Hamid
Ilorin Journal of Science 8 (1), 49-59 2021

Chemical composition and nutritional characterization of cotton seed as potential feed supplement
MF Zubair, OS Ibrahim, O Atolani, AA Hamıd
Journal of the Turkish Chemical Society Section A: Chemistry 8 (4), 977-982 2021

Dietary Supplementation of Tetracarpidium conophorum (African Walnut) Seed Enhances Muscle n‐3 Fatty Acids in Broiler Chickens
KD Adeyemi, A Abdulrahman, SO Ibrahim, MF Zubair, O Atolani, ...
European Journal of Lipid Science and Technology 122 (6), 1900418 2020

Papaya (Carica papaya L., pawpaw)(ed) nonvitamin and nonmineral nutritional supplements
AB Nafiu, A Alli-Oluwafuyi, A Haleemat, IS Olalekan, MT Rahman
Elsevier 2019

Fatty acids composition, antimicrobial potential and cosmeceutical utilization of Prosopis africana seed oil
MF Zubair, O Atolani, SO Ibrahim, OS Oguntoye, RA Oyegoke, GA Olatunji
Journal of the Mexican Chemical Society 62 (3), 39-50 2018

Chemical and biological evaluations of potent antiseptic cosmetic products obtained from Momordica charantia seed oil
MF Zubair, O Atolani, SO Ibrahim, OS Oguntoye, HA Abdulrahim, ...
Sustainable Chemistry and Pharmacy 9, 35-41 2018

MOST CITED SCHOLAR PUBLICATIONS

Green synthesis and characterisation of natural antiseptic soaps from the oils of underutilised tropical seed
O Atolani, ET Olabiyi, AA Issa, HT Azeez, EG Onoja, SO Ibrahim, ...
Sustainable Chemistry and Pharmacy 4, 32-39 2016
Citations: 79

Chemical constituents and antimicrobial properties of Phyllanthus amarus (Schum & Thonn)
MF Zubair, O Atolani, SO Ibrahim, OO Adebisi, AA Hamid, RA Sowunmi
Bayero Journal of Pure and Applied Sciences 10 (1), 238-246 2017
Citations: 36

Papaya (Carica papaya L., pawpaw)(ed) nonvitamin and nonmineral nutritional supplements
AB Nafiu, A Alli-Oluwafuyi, A Haleemat, IS Olalekan, MT Rahman
Elsevier 2019
Citations: 9

Chemical compositions from the leaf extracts ofFuntumiaafricana (Benth.) stapf with its antioxidant and anti-inflammatory activity.
AA Hamid, MF Zubair, FO Olajide, SO Ibrahim, A Shehu, MI Bale, ...
Nigerian Journal of Chemical Research 23 (2), 83-96 2018
Citations: 2