Dr. Samuel M. Karenga, Ph.D

Samuel M. Karenga, Ph.D
Lecturer, School of Pure and Applied Sciences
Head, Pure and Applied Sciences Research Programme, Mount Kenya University

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Education

1. B.Sc., 2002, (1st Class Honours), Egerton University, Njoro, Kenya
2. M.Sc., 2009 (Organic Chemistry), Egerton University, Njoro, Kenya
3. Ph.D., 2010.(Analytical Chemistry), Oklahoma State University, Stillwater, Oklahoma, USA

Professional Experience

1. Postdoctoral Fellow (2010-2011), Lawrence Berkeley National Laboratory (DoE), Berkeley, California, USA
2. Lecturer (2011-2013), San Francisco State University, San Francisco, California, USA

 Areas of expertise:

In solution protein digestion, peptide mapping, polymer and small molecules synthesis, Matrix-assisted laser desorption/ ionization (MALDI) capillary electrophoresis (CE), capillary electrochromatography (CEC), high-pressure liquid chromatography (HPLC), size exclusion chromatography (SEC), gradient polymer chromatography (GPC), Gas chromatography (GC), characterization techniques (SEC, GPC, BET, XPS, NMR, FT-IR, MS, UV/VIS etc.), Bio-assay guided extraction, isolation and characterization of botanical natural products etc.

 Research Interests

1. High performance liquid chromatography/affinity chromatography/capillary electrophoresis; capillary electrochromatography
2. Stationary phase post-modification reactions such as hypercrosslinking, grafting etc
3. Isomeric separations; biological and environmental separations
4. Proteomics; glycomics
5. Organic synthesis
6. Natural products isolation and characterization
7. Environmental analysis

Publications

1. Karenga, S., El Rassi, Z., Mixed ligand monolithic columns for reversed-phase capillary electrochromatography via hydrophobic and π interactions. Electrophoresis, a.    2011, 32, 1044–1053
2. Karenga, S., El Rassi, Z., Controlling retention, selectivity and magnitude of electroosmotic flow by segmented monolithic columns consisting of octadecyl and naphthyl monolithic segments.  Applications to RP-CEC of both neutral and charged solutes.  Electrophoresis, 2011, 32, 1033–1043
3. Karenga, S., El Rassi, Z., Trends in nonpolar polymer-based monolithic columns for reversed-phase capillary electrochromatography.  Electrophoresis, 2010, 32, 90–104
4. Karenga, S., El Rassi, Z., Naphthyl methacrylate-phenylene diacrylate-based monolithic column for reversed-phase capillary electrochromatography via hydrophobic and π interactions. Electrophoresis, 2010, 31, 3200–3206
5. Karenga, S., El Rassi, Z., A novel, neutral hydroxylated octadecyl acrylate monolith with fast electroosmotic flow velocity and its application to the separation of various solutes including peptides and proteins in the absence of electrostatic interactions. Electrophoresis, 2010, 31, 3192–3199
6. Karenga, S., El Rassi, Z., Naphthyl methacrylate-based monolithic column for RP-CEC via hydrophobic and π-interactions. Electrophoresis, 2010, 31, 991-1002
7. Karenga, S., El Rassi, Z., Neutral octadecyl monolith for reversed phase capillary electrochromatography of a wide range of solutes. J. Sep. Sci., 2008, 31, 2677-2685