Bio

Professional profile

A result-driven organic chemistry associate professor with over twenty five (25) years of  teaching experience at university level and two years in the industry. I have published twenty nine (29) papers in refereed journals, supervised two (2) Ph.D. and ten (10) M.Sc. students in chemistry to completion. Three (3) Ph.D and seven (7) MSc students are ongoing. Over time I have examined  fourty (40) theses at both M.Sc. and Ph.D.

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(Last updated: December 13, 2016)

Publications

Submitted

V., S, J. K, B. O, A. Y.  Submitted.  In-vitro anthelmintic activity of Plectranthus barbatus Andr. leaves on adult Haemonchus contortus worms: A case study of Migori County, Kenya . Journal of Pharmacy and Biological sciences.

In Press

E., K, A. Y, K. K, D. A'o.  In Press.  Evaluation of efficiency of Kipevu wastewater treatment plant in Mombasa County, Kenya.

2016

  2016.  Assessment of selected parameters for industrial effluents from some industrial sites in Nairobi, Kenya. Univesal Journal of Chemistry. 4(2):65-68.ujc3-16406592.pdf

2015

V., S, J. K, B. O, A. Y, M. K.  2015.  In-vitro anthelmintic activity of vernonia amygdalina Del. (asteraceae) roots using adult Haemonchus contortus worms. International Journal of Pharmacological Research. 5(1):1-7.vernonia_amygdalina.pdf

2014

Sirama, V, Owuor B, Yusuf A, Kokwaro J.  2014.  In-Vitro anthelmintic Bioactivity study of Eclipta prostrate L. (whole plant) using adult Haemonchus contortus worms: A case study of Migori County, Kenya. Journal of Applied Chemistry (IOSR). 9(6):45-53.
J.K., M, A.M. S, O.A. O, W. W, A.O. Y.  2014.  Determination of heavy metals and nutrients in rivers Naka and Irigu, Chuka using AAS UV/visible spectrophotometry. Journal of Applied Chemistry (IOSR). 7(11):82-88.scan0056.pdf
s., D, L. B, H.M. A, A. Y, E. K, H. M.  2014.  4'-Prenyloxyderrone from the stem bark of milletia oblata ssp. teitensis and the antiplasmodial activities of isoflavones from some miletia species. Phytochemistry Letters. 8:69-72.scan0020.pdf
P., A, A. S, A. O, A. Y.  2014.  Determination of selected micro and macronutrients in sugarcane growing soils at Kakamega North District, Kenya. IOSR Applied Chemistry. 7(7, Version I):34-41.scan0009.pdf
A., R, A. S, J. N, A. Y, W. W.  2014.  Bioethanol production from waste crops and crop residues. IOSR Applied Chemistry. 7(7, Version I):42-47.scan0007.pdf
Orata, D, Njenga H, Mukabi M, Yusuf A.  2014.  Sodium thiosulphate, a novel electrocatalyst in the electrosynthesis of electronically conducting polymer-polythiophene. IOSR Applied Chemistry. 7(5, ver. III):73-85.scan0005.pdf
Orata, D, Mukabi M, Njenga H, Yusuf A.  2014.  Electro-characterization of polypyrrole electrosynthesized on a montomorillonite host-matrix, in aqueous media containing sulphuric acid as supporting electroyte. IOSR Applied Chemistry. 7(5, ver. III):59-72.scan0003.pdf
Muiva, L, Macharia B, Akala H, Derese S, Omosa LK, Yusuf A, Kamau E, Koch A, Heidenreich M, Yenesew A.  2014.  6a-Hydroxy-α-toxicarol and (+)-Tephrodin with antiplasmodial activities from Tephrosia species. Phytochemistry Letters. 10:179-183.scan0062.pdf
D., O, H. N, N. C, A. Y, M. D.  2014.  Poyaniline and poythiophene modified electrodes in energy storage units with hydrocarbon gel/bentonite/sodium choride as electrolyte gel. IOSR Applied Chemistry. 7(5, ver. II):63-80.scan0006.pdf
Orata, D, Yusuf A, Nineza C.  2014.  Electroanaysis of unconventional (herbal) drugs using surface modified electrodes in conjunction with cycic votammetry. IOSR Applied Chemistry. 7(5, ver II):56-62.scan0004.pdf
D., O, A. Y, C. N, M. M, D. M.  2014.  Surface modified electrode used in the electro-analysis of N-acetyl p-aminophenol-A pharmaceutical drug. IOSR Applied Chemistry. 7(5, ver II):90-99.scan0012.pdf
Orata, D, Yusuf A, Nineza C, Mukabi M, Mbui D.  2014.  Electrochemical characterization of amoxycillin, a broad spectrum antibiotic on a bentonite host matrix, using cyclic voltammetry. IOSR Applied Chemistry. 7(5, ver. III):50-58.scan0002.pdf
Orata, D, Yusuf A, Nineza C, Mbui D, Mukabi M.  2014.  Surface modified electrodes used in cyclic voltammetric profiling of quinine, as antimalarial drug”. IOSR Applied Chemistry. 7(5, ver II):81-89.scan0001.pdf
Yusuf, A, Gitu P, Bhatt B, Njogu M, Salim A, Orata D.  2014.  Solid-Phase Peptide Synthesis of Arginine-vasopressin With Amide Side chain of Asparagine Protected With 1-Tetralinyl Group. chemistry and materials research. 6(4):60-65.scan0010.pdf
Orata, D, Yusuf A, Nineza C.  2014.  Derivatized electrodes in the electroanalysis of pyrimethamine and/or 2-sulfanilamido-3-methoxypyrazine(metakelfin) and lumefantrine / artemether (Coatem. Chemistry and Chemicall Engineering. 8:215-225.scan0011.pdf
Yusuf, A, Gitu P, Bhatt B, Njogu M, Salim A, Orata D.  2014.  1-Tetralinyl as carboxamide protecting group for asparagines and application to N-alpha-t-butyloxycarbonyl (Boc) solid-phase peptide synthesis of oxytocin. chemistry and materials research. 6(2):1-11.scan0013.pdf

2011

Yusuf, A.  2011.  Organic Chemistry Manual 2 (SCH 202). scan0024.pdf

2010

Mbugua, P, Salim A, Onditi A, Yusuf A.  2010.  Determination of Micronutrients and micronutrients in Soil Samples from Around Lake Ol-Bolossat. Int. J. Biol. Sci.. 2(8):140-148.scan0016.pdf
DM, K, A S, A O, A Y.  2010.  Environmental effects of selected chemical and physical geothermometers at Olkaria Geothrmal power plant. Journal of Sustainable Development. 3(6):14-25.: International journal of Sustainable development Abstractscan0015.pdfWebsite

21) S. Derese, A. Yenesew, J.O. Midiwo, Heydenreich and M.G. Peter. (). ..

2007

N, MM, A Y, B.M. B, PM G.  2007.  Conversion of Vernonia galamensis oil to pyridino-vernolamides and their antimicrobial activities. Bulletin of the Chemical Society of Ethiopia. 21:103-110.: The Chemical Society of Ethiopia Abstractscan0019.pdfWebsite

21) S. Derese, A. Yenesew, J.O. Midiwo, Heydenreich and M.G. Peter. (). ..

2006

Mbugua, M, Yusuf A, Gitu P.  2006.  Synthesis of Vernolamides from Vernonia galamensis oil under varied conditions and their antimicrobial activities. The Kenya Chemical Society. 3:1-8.scan0017.pdf
Sambo, AS, Iloeje OCJ, Ojosu OJ, Olayande S, Yusuf AO.  2006.  Nigeria's Experience on the Application of IAEA‟ s Energy Models (MAED & WASP) for National Energy Planning.

2004

Yusuf, A.  2004.  Organic Chemistry 2 (SCH 202). , Nairobi: University of Nairobi Pressscan0023.pdf
Yusuf, A, Bhatt B, Gitu P.  2004.  1-Tetralinyl group for asparagine side-chain protection, and application to Boc solid-phase peptide synthesis”. The Kenya Chemical Society. 2:14-18.
Yusuf, A, Bhatt B, Gitu P.  2004.  1-Tetralinyl group for asparagine side-chain protection and application to Boc- Solid-phase Peptide Synthesis of mesotocin. The Kenya Chemical Society. 2(1):14-18.: Journal of the Kenya Chemical Society Abstractscan0018.pdfWebsite

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2002

Yusuf, A, Bhatt B, Gitu P.  2002.  ’SPPS of isotocin with amide of asparagine protected with 1-tetralinyl. TFMSA deprotection, cleavage and air oxidation of mercapto groups to disulphide. S. Afr. J. Chem. 55:87-96.scan0053.pdf
YUSUF, DROKEYOAMIR.  2002.  A.O. Yusuf, B.M. Bhatt and P.M. Gitu. . S. Afr. J. Chem., 55,87-96, 2002.. : Journal of the Kenya Chemical Society Abstract
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2001

Yusuf, A, Bhatt B, Gitu P.  2001.  ’SPPS of isotocin with amide of asparagine protected with 1-tetralinyl. TFMSA deprotection, cleavage and air oxidation of mercapto groups to disulphide. Bull Chem. Soc. Ethiop. 15(2):143-149.scan0054.pdf
YUSUF, DROKEYOAMIR.  2001.  A.O. Yusuf, B.M. Bhatt and P.M. Gitu. . Bull. Chem. Soc. Ethiop. 15(2), 143-149, 2001. : Journal of the Kenya Chemical Society Abstract
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1998

Yusuf, A.  1998.  Solid-phase peptide syntheses of oxytocin, oxytocin analogs and interferon short chain with the amide side-chain functionality of asparagine protected with 1-tetralinyl group. , Nairobi: University of Nairobiscan0021.pdf
Gitu, P, Yusuf A, Ogutu V.  1998.  Application of tetralinyl group in solid-phase peptide synthesis. Int. J. BioChemiPhysics. 6,7(1,2):7-10.scan0055.pdf
Gitu, P, Yusuf A, Bhatt B.  1998.  Application of tetralinyls as carboxamide protecting groups in peptide synthesis. Bull. Chem. Soc. Ethiop.. 12:35-43.
YUSUF, DROKEYOAMIR.  1998.  Solid-phase peptide syntheses of oxytocin, oxytocin analogs and interferon short chain with the amide side-chain functionality of asparagine protected with 1-tetralinyl group. Doctor of Philosophy in Chemistry. : Journal of the Kenya Chemical Society Abstract
1-Tetralone was converted to 1-aminotetralin. This amine was then used to protect the carboxamide side-chain of asparagine. Syntheses of oxytocin and its derivatives were then done via Boc-solid-phase peptide synthesis using this protected asparagine. After syntheses of the nonapeptide resins, cleavage and eventual cyclization of the hormones was done using trifluoromethane sulphonic acid at 40 degrees Celcius for two hours.
YUSUF, DROKEYOAMIR.  1998.  P.M. Gitu, A.O. Yusuf and B.M. Bhatt."Application of tetralinyls as carboxamide protecting groups in peptide synthesis".. Bull. Chem. Soc. Ethiop. 12, 35-43, 1998. : Journal of the Kenya Chemical Society Abstract
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1993

Bhatt, B, Gitu P, Yusuf A.  1993.  Synthesis of 1-aminotetralin and its derivatives by reductive amination of their corresponding 1-tetralones". Int. J. BioChemiPhysics. 2(1,2):55-77.
YUSUF, DROKEYOAMIR.  1993.  Synthesis of 1-aminotetralin and its derivatives by reductive amination of their corresponding 1-tetralones. Int. J. of BioChemiPhysics. : Journal of BiochemiPhysics Abstract
Tetralones were converted to their corresponding N-formyl derivatives using ammonia and formic acid at 170-180 degrees Celsius. These were then hydrolyzed to the corresponding amines using acid and base. In all cases base hydrolysis gave better yields as compared to acid hydrolysis.

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