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Publications


2013

Kithinji, J.  2013.  Genetic divergence in Jatropha curcas L., a potential biofuel crop in Kenya. Future science Journal. 4(3):313-322.

2005

2001

Pennise, DM, Smith KR, Kithinji JP, Rezende ME, Raad TJ, Zhang J, Fan C.  2001.  Emissions of greenhouse gases and other airborne pollutants from charcoal making in Kenya and Brazil. Website

1989

Barkera, IK, Bartlea KD, Clifforda AA, Kithinji JP, Shilstonea GF, Phillips TR, Thomas G.  1989.  Separation of compounds from gasifier tars by extraction with supercritical carbon dioxide. AbstractWebsite

Coal gasification tars were extracted with supercritical carbon dioxide at different temperatures and pressures, and the properties of the extraction residues (pitches) were determined by elemental analysis, size-exclusion chromatography and simulated distillation. Extract fractions were analysed by supercritical fluid chromatography. The pitches generally had softening points near the temperature of extraction. Raising the extraction temperature at constant pressure reduces the solvent density, and hence reduces the solubility of tar constituents. Extraction is optimized by extracting at low flow rates, initially at low temperature (high density) to remove low molecular mass compounds, and then increasing the temperature to ensure good contact with molten pitch and increasing the pressure to increase the density. Contact with powdered pitch is preferable. In agreement with calculated solubilities, polycyclic aromatic hydrocarbons, especially naphthalene, fluorene and phenanthrene, are the principal constituents of the extracts. More polar compounds remain in the pitch.

P, DRKITHINJIJACOB.  1989.  Unified multidimensional microcolumn chromatography.. J. Microcoloumn Separations. : University of nairobi Abstract
Abstract in Bellamy, M. and B. Greenshields (eds), Issues in Agricultural Development: Sustainability and Cooperation. IAAE Occasional Paper No. 6. Dartmouth Publishing Co. Ltd, Aldershot.
P, DRKITHINJIJACOB.  1989.  Chromatography with supercritical fluids, in Piggott and A. Paterson (eds) Distilled beverage flavour: Recent developments.. VCH Publishers, Cambridge, U.K.. : University of nairobi Abstract
Abstract in Bellamy, M. and B. Greenshields (eds), Issues in Agricultural Development: Sustainability and Cooperation. IAAE Occasional Paper No. 6. Dartmouth Publishing Co. Ltd, Aldershot.

1988

P, DRKITHINJIJACOB.  1988.  Supercritical fluid chromatography of ecdsteroids.. J. Chromatogr. 436 ( 497-502).. : University of nairobi Abstract
Abstract in Bellamy, M. and B. Greenshields (eds), Issues in Agricultural Development: Sustainability and Cooperation. IAAE Occasional Paper No. 6. Dartmouth Publishing Co. Ltd, Aldershot.
P, DRKITHINJIJACOB.  1988.  LC-GC, SFC-GC and SFC and SFE-GC interfacing.. Anal. Chem. 60 (1988) 683-702A.. : University of nairobi Abstract
Abstract in Bellamy, M. and B. Greenshields (eds), Issues in Agricultural Development: Sustainability and Cooperation. IAAE Occasional Paper No. 6. Dartmouth Publishing Co. Ltd, Aldershot.
P, DRKITHINJIJACOB.  1988.  Studies of the temperature dependence of retention in supercritical fluid Chromatography.. J. Chem. Soc. Faraday Trans. 84(12), (1988) 4487-4493.. : University of nairobi Abstract
Abstract in Bellamy, M. and B. Greenshields (eds), Issues in Agricultural Development: Sustainability and Cooperation. IAAE Occasional Paper No. 6. Dartmouth Publishing Co. Ltd, Aldershot.

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