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Prof. J.O. Lalah - Publications

List of publications.

A) Books, Dissertations and Book Chapters

Chamula P. Musungu, Isaac Jondiko, Lalah JO (2013). Anthropogenic Point Sources and Levels of Nutrients to Winam Gulf: Kisumu City point sources of nitrogenous and phosphorous Nutrients to River Kisat, Nyalenda Wigwa Stream and Winam Gulf. Lambert Publishers, Lambert Academic Publishing AG & Co KG. ISBN-10: 3659377856, April 2013, Paperback, 120 pages.

Lisouza FA, Okinda PO, Lalah JO (2012). Environmental fate of Polycyclic Aromatic Hydrocarbons emitted from indoor burning of fuel biomass in poorly ventilated households: A case study in the traditional rural households in western Kenya. In: Polycyclic Aromatic Hydrocarbons: Chemistry, Occurrence and Health Issues. Eds Guilherme C. Bandeira and Henrique E. Meneses. Nova Science Publishers Inc., Hauppauge, New York, USA

Lalah JO , Omwoma S, Osano FO, Omukunda E, Wafubwa G, Muyekho D, Schramm KW (2012). Assessment of potential risks and effectiveness of agrochemical usage in a catchment: A case study of the Nzoia Nucleus Estate sugarcane farms in western Kenya. Chapter 9 in: An IAEA Book Publication: A book chapter contribution (submitted).

Lalah, J.O ., Otieno, P.O. (2012): Analytical, legal and regulatory mechanisms in Kenya, and General Conclusions regarding carbofuran use, misuse and monitoring in Kenya. In Chapter 3: A Chronicling of long-standing carbofuran use and its menace to wildlife in Kenya. Book Title: Carbofuran and Wildlife Poisoning: Global Perspectives and Forensic Approaches, 1 st Edition, Ngaio Richards (Ed). John Wiley and Sons, Inc, London, UK, 84-98.

Otieno, P.O., Lalah, J.O., Munir, V. (2012). Forensic analysis of carbofuran in vultures and environmental samples collected from Laikipia and Isiolo Districts. In Chapter 3: A Chronicling of long-standing carbofuran use and its menace to wildlife in Kenya. Book Title: Carbofuran and Wildlife Poisoning: Global Perspectives and Forensic Approaches, 1 st Edition, Ngaio Richards (Ed). John Wiley and Sons, Inc, London, UK, 77-84.

Lalah, J.O ., Otieno, P.O. (2012). Background on pesticide use and environmental monitoring in Kenya. In Chapter 3: A Chronicling of long-standing carbofuran use and its menace to wildlife in Kenya. Book Title: Carbofuran and Wildlife Poisoning: Global Perspectives and Forensic Approaches, 1 st Edition, Ngaio Richards (Ed). John Wiley and Sons, Inc, London, UK, 39-52.

Wandiga, S.O., Lalah, J.O. and Kaigwara, P.N. (2002). Pesticides in Kenya, Chapter 4, In: Pesticide Residues in Tropical Ecosystems: Distribution, Fate and Effects,Milton D. Taylor, Stephen J. Kline, Fernando P. Carvalho, Damiano Barcelo and Jan Everaarts (Eds), Taylor and Francis, London and New York, 49-80.

Lalah, J.O . (1993): Studies on the dissipation and metabolism of some insecticides under Kenyan environmental conditions, PhD thesis, University of Nairobi, Kenya, 140 pp.

Lalah, J.O. (1986) The influence of diesel engine fuel composition on particulate emissions, MSc thesis, University of Leeds, UK.

 B) Articles in journals and contributions to book chapters

Solomon Omwoma, Joseph O. Lalah, David M.K. Ongeri, Karl-Werner Schramm (2013) Assessment of selected physicochemical features of sediment and water and their relationship with heavy metals in sugarcane farms in Nzoia, Kenya.
Environmental Earth Sciences DOI: 10.1007/s12665-01302824-y (on line).

Lugasi OS, Okinda PO, Ongeri DMK, Umani M, Lalah JO, Schramm KW (2013). Declining fish population and biodiversity in lake Victoria, Kenya: possible management options. Lakes and Reservoirs: Research and Management (submitted).

Chamula P.M., D.M.K. Ongeri, I.J. Ogoche, J.O. Lalah. (2013). Assessment of Nitrogenous and Phosphorous nutrients levels from seven point sources in Kisumu city and their impact on River Kisat and Nyalenda Wigwa stream before discharge into Winam Gulf, Lake Victoria. Environmental Earth Sciences (in press).

Lisouza FA, Owuor PO, Lalah JO (2013). Relative accumulation levels of PAHs in accumulated soot in the traditional rural households in western Kenya. Aerosol and Air Quality Journal (submitted).

Joanne Atieno Ogunah, Chrispin Ounga Kowenje, Elly Tetty Osewe, Joseph O. Lalah, David Agoro Jaoko, Robert Njuguna Koigi (2013). Effects of Zeolites X and Y on the Degradation of Malathion in Water, Science Journal of Chemistry. Vol. 1, No. 1, 2013, pp. 7-13. doi: 10.11648/j.sjc.20130101.12.

Chrispin Ounga Kowenje, Elly Tetty Osewe, Joseph O. Lalah (2013). Effects of Faujasite X and Y Zeolites on the 1,1,1-Trichloro-2,2’ bis(p-chlorophenyl)ethane (DDT) Degradation during Water Purification, International Journal of Environmental Protection and Policy. Vol. 1, No. 1, 2013, pp. 9-15. doi: 10.11648/j.ijepp.20130101.12.

Otieno, P.O., Schramm, K.-W., Pfister, G., Lalah, J.O. (2013): Comparative evaluation of ELISA kit and HPLC for the determination of Chlorpyrifos ethyl residues in water and sediment from Lake Naivasha in Kenya. Talanta DOI: 10.1016/j.talanta.2013.09.014 (online).

Onyango AA, Lalah JO and Wandiga SO (2012). The Effect of Local Cooking Methods on Polycyclic Aromatic Hydrocarbons (PAHs) Contents in Beef, Goat Meat, and Pork as Potential Sources of Human Exposure in Kisumu City, Kenya, Polycyclic Aromatic Compounds, 32:5, 656-668.

Omwoma S, Omwoyo WN, Alwala JO, Ongeri DMK, Lagat SC, Lalah JO (Sept 2012). Nutrient reduction in run-off water from sugarcane farms by sedimentation method. The Environmentalist 32(4): 494-502.

Muendo BM, Lalah JO, Getenga ZM (July 2012) Behavior of pesticides residues in agricultural soil and adjacent River Kuywa sediment and water samples from Nzoia sugarcane belt in Kenya. Environmentalist Vol 32: 433-444. DOI 10.1007/s10669-012-9407-4.

Ongeri, D.M.K., Lalah, J.O., Wandiga, S.O. (Feb 2012): Seasonal variability in Cadmium, Lead, Copper, Zinc and Iron concentrations in the three major fish species, Oreochromis niloticus, Lates niloticus and Rastrineobola argentea in Winam Gulf, Lake Victoria: Impact of wash-off into the lake. Bulletin Environmental Contamination & Toxicology Vol 88: 166-171. DOI 10.1007/s00128-011-0472-z.

Onyango, A.A., Lalah, J.O., Wandiga, S.O., Gichuki, J. (April 2012): Assessment of Polycyclic Aromatic Hydrocarbons in Lates niloticus, Oreochromis niloticus and Rastrineobola argentea as Sources of Human Exposure in Kisumu Bay, Winam Gulf of Lake Victoria. Bulletin Environmental Contamination & Toxicology 88 (5), 747-751.

Otieno, P.O., Schramm, K.-W., Pfister, G., Lalah, J.O., Ojwach, S.O. (June 2012): Spatial distribution and temporal trend in concentration of carbofuran, diazinon and chlorpyrifos ethyl residues in sediment and water in Lake Naivasha, Kenya. Bulletin Environmental Contamination & Toxicology 88 (4), 526-532.

Peter O. Otieno, Karl-Werner Schramm, P. Okinda Owuor, Joseph O. Lalah & Gerd Pfister (July 2012) Impacts of climate-induced changes on the distribution of pesticides residues in water and sediment of Lake Naivasha, Kenya. Environ Monit Assess Vol 186 (7) July 2012. DOI 10.1007/s10661-012-2743-5.

Mutia, T.M., M. Virani, W.N. Moturi, B. Muyela, W.J. Mavura, and J.O. Lalah. (October 2012). Copper, lead and cadmium concentrations in surface water, sediment and fish, C. Carpio, samples from Lake Naivasha: effect of recent anthropogenic activities. Environmental Earth Sciences 67(04): 1121-1130.DOI: 10.1007/s12665-012-1556-8.

Omwoma S., S., Umani, M., D.M.K. Ongeri, J.O. Lalah, K-W. Schramm. (2012). Analysis of fish population and biodiversity in the Winam Gulf of Lake Victoria based on catch statistics of the years 1995, 2000, 2005 and 2009. Monday 1 October 2012: GS01 – Biodiversity and Biological Conservation – Book of Abstracts 1-8.

Lancaster, S., Ngaio, R.L.R., Gachanja, A., Ogada, D., Masumi, G., Lalah, J.O., Otieno, P., Munir, V., Dino, J.M. (2011). Environmental monitoring in Kenya: preserving the biodiversity of East Africa; Eds Cecilia MacLeod, Roger Reeve. Royal Society of Chemistry-Environmental Chemistry Group (ECG) Bulletin, September, pp 3-8,2011, London, UK.

Lisouza, F.A., Owuor, P.O., Lalah, J.O. (2011): Variation in indoor levels of polycyclic aromatic hydrocarbons from burning various biomass types in the traditional grass-roofed households in Western Kenya. Environmental Pollution 159, 1810-1815.

Otieno, P.O., Lalah, J.O., Virani, M., Jondiko, I.O., Schramm, K.-W. (2011). Carbofuran use and abuse in Kenya: residues in soils, plants, water courses and the African white-backed Vulture (Gyps africanus) found dead. Environmentalist 31, 382-393.

Omwoma S, Lalah JO, Ongeri DMK (2011). Impact of agronomic inputs in sugarcane farming on total metal loads in aquatic ecosystem and soils within Lake Victoria basin, Kenya. In: Proceedings of Kabarak University First International Conference Vol 1. October 2011.

Lagat, S.C., Lalah, J.O., Kowenje, C.O., Getenga, Z.M., Chepkui, R. (2011). Metribuzin sorption dynamics in acid soils of Nzoia Sugarcane zone in western Kenya. Int. J. Disaster Management and Risk Reduction 3 (2), 64-72.

Lagat, S.C., Lalah, J.O., Kowenje, C.O., Getenga, Z.M. (2011). Metribuzin mobility in soil columns as affected by environmental and physico-chemical parameters in Mumias Sugarcane zone, Kenya. ARPN J. Agricultural and Biological Science 6 (3), 27-33.

Adoli, F.K.L., Lalah, J.O. and Okoth, A.O. (2011). Analysis of Moss and Topsoil to Monitor Heavy Metal Emissions from a Pulp and Paper Mill in Western Kenya. Bulletin Environmental Contamination and Toxicology 86 (1), 137-143.

Omwoma, S., Lalah, J.O., Ongeri, D.M.K., Wanyonyi, MB (2010). Impact of Fertilizers on Heavy Metal Loads in Surface Soils in Nzoia Nucleus Estate Sugarcane Farms in Western Kenya. Bulletin Environmental Contamination & Toxicology 85 (6), 602-608, DOI: 10.1007/s00128-010-0133-7.

Ongeri, D.M.K., Lalah, J.O. and Wandiga, S.O. (2010). Speciation of Cd, Cu, Zn, Fe and Pb in sediments sampled from Lake Victoria basin, Kenya. Environmentalist 3, 254-264.

Otieno, P.O., Lalah, J.O., Virani, M., Jondiko, I.O. and Schramm, K.-W. (2010). Soil and Water Contamination with carbofuran residues in agricultural farmlands in Kenya following the application of the technical formulation Furadan. J Environmental Science & Health Part B: Pesticides, Food Contaminants, and Agricultural Wastes, 1532-4109, Vol 45 (2), 137-144.

Otieno, P.O., Lalah, J.O., Virani, M., Jondiko, I.O. and Schramm, K.-W. (2010). Carbofuran and its toxic metabolites provide forensic evidence for Furadan exposure in Vultures (Gyps africanus) in Kenya. Bulletin Environmental Contamination Toxicology 84 (5): 536-544.

Kwach, B.O. and Lalah, J.O. (2009). Spatial and seasonal variation of polycyclic aromatic hydrocarbon concentrations in water and sediment of Kisumu city bay area of Winam Gulf, Lake Victoria-Kenya. Bull Environ Contamination & Toxicology 83, 727-733.

Kwach, B.O. and Lalah J.O. (2009). High concentrations of polycyclic aromatic hydrocarbons n surface sediment and water in Car Wash and Kisat areas of Winam Gulf, Lake Victoria. Bull Environ Contam Toxicol 83, 734-741.

Lalah, J.O., Muendo, B.M. and Getenga, Z.M. (2009). The dissipation of hexazinone in tropical soils under semi-controlled field conditions in Kenya. J Environ Science & Health Part B 44 (7), 690-696 .

Lalah, J.O ., Njogu, S.N. and Wandiga, S.O. (2009). The effects of Mn 2+, Ni 2+, Cu 2+, Co 2+ and Zn 2+ ions on pesticide adsorption and mobility in a tropical soil. Bull Environ Contam Toxicol 83(3), 352-357.

Ochieng, E.Z., Lalah, J.O. and Wandiga, S.O. (2009). Athropogenic Sources of heavy metal input into the Indian Ocean Coast of Kenya. Bulletin Environmental Contamination & Toxicology 83 (4), 600-607.

Ongeri, D.M.K., Lalah, J.O., Wandiga, S.O., Schramm, K.-W. and Michalke, B. (2009). Trace metals in Lates Niloticus and Agentie sampled from Winam Gulf of Lake Victoria as consumed by human. Toxicological Environmental Chemistry 91(2), 233-240 .

Ongeri, D.M.K., Lalah, J.O., Wandiga, S.O., Schramm, K.-W. and Michalke, B. (2009). Levels of Heavy Metals in multisectaral samples from Winam Gulf of Lake Victoria. Bulletin Environmental Contamination & Toxicology 82 (1), 64-69.

Barasa, M.W., Lalah, J.O. and Wandiga, S.O. (2009). Seasonal Variation in Concentration of Organochlorine Pesticide Residues in tropical Estuarine Sediments along the Indian Ocean Coast of Kenya. Marine Pollution Bulletin 54, 1979-1984 .

Lalah, J.O. , Ochieng, E.Z. and Wandiga, S.O. (2008). Sources of heavy metal input into Winam Gulf in Kenya. Bull Environ Contam Toxicol 81, 277-284.

Ochieng, E.Z., Lalah, J.O. and Wandiga, S.O. (2008). Water quality and trace metal distribution in a pristine lake in the lake basin in Kenya. Bulletin Environmental Contamination & Toxicology 80 (4), 362-368

Barasa, M.W., Lalah, J.O. and Wandiga, S.O. (2008). Persistent Organochlorine Pesticide Residues and Seasonal Variability in Marine Fish from the Indian Ocean Coast of Kenya. Toxicological Environmental Chemistry 90 (3), 535-547.

Lalah, J.O ., Ochieng, E.Z. and Wandiga, S.O. (2008). Water quality and heavy metal distribution in a pristine lake in the Lake Basin in Kenya. Bulletin Environmental Contamination & Toxicology 80 (4), 362-368.

Ochieng, E.Z., Lalah, J.O. and Wandiga, S.O. (2007). Analysis of heavy metals in water and surface sediment in five Rift Valley lakes in Kenya for assessment of recent increase in anthropogenic activities. Bulletin Environmental Contamination & Toxicology 79 (5), 570-576.

Lalah, J.O., Severin, G.F., Lenoir, D., Bechechti, A., Guenther, K., Kettrup, A. and Schramm, K-W, (2007). The effects of branched p-nonylphenol isomer (4(3’-,6’-dimethyl-3’-heptyl)-phenol) on embryogenesis in Lymnaea stagnalis L. Archives Environmental Contamination & Toxicology 52, 104-112.

Lalah, J.O. and Wandiga, S.O. (2007). Copper Binding by Dissolved Organic Matter in different Freshwaters in Kenya. Bulletin Environmental Contamination & Toxicology 79 (6), 633-638.

Ochieng, E.Z., Lalah, J.O. and Wandiga , S.O. (2006). HeavyMetals in Winam Gulf of lake Victoria, Kenya. Bulletin Environmental Contamination & Toxicology 77 (3), 459-468.

Lalah, J.O. and Wandiga, S.O. (2006). Binding and Water Solubility Enhancement of14 C-Benzo[a]Pyrene by Dissolved Organic Matter in Freshwaters in Kenya. Bulletin Enviromental Contamination & Toxicology 77 (6), 816-825.

Lalah, J.O. and Wandiga, S.O. (2006). Extinction Coefficients and Dissolved Organic Carbon (DOC) contents in freshwater samples taken from different locations in Kenya. Bulletin Environmental Contamination & Toxicology 77 (4), 553-542.

Lalah, J.O. and Kaigwara, P.N. (2005). Polynuclear Aromatic Compounds (PAC) in kerosene, diesel and unmodified sunflower oils and in respective exhaust particulate emissions, Toxicological Environmental Chemistry 87, 463-479.

Wandiga, S.O., Yebiyo, B.T., Kamau, G.N. and Lalah, J.O. (2005). The distribution, fate and effects of 14C- DDT in model ecosystems simulating tropical fresh water environments. Bulletin Environmental Contamination & Toxicology 74 (5), 928-937.

Wandiga, S.O., Jumba, I.O., Mutaaga, M. and Lalah, J.O. (2003). The distribution, metabolism and toxicity of 14C-DDT in model aquarium tanks with fish and sediment simulating a tropical marine environment, Toxicological Environmental Chemistry 85 (4-6), 253-268.

Lalah, J.O., Ongeri, DMK. and Wandiga, S.O., (2003). Dissipation, distribution and uptake of 14C-chlorpyrifos in a model tropical seawater/sediment/fish ecosystem. Bulletin Environmental Contamination & Toxicology 70, 883-890.

Lalah, J.O ., Schramm, K.-W., Behechti, A., Henkelmann, B., Lenoir, D., Guenther, K. and Kettrup, A. (2003). The dissipation, distribution and fate of a branched 14C-Nonylphenol isomer in lake water/sediment systems, Environmental Pollution 122, 195-203.

Lalah, J.O., Yugi, P.O., Jumba, I.O. and Wandiga, S.O. (2003). Organochlorine Pesticide Residues in Tana and Sabaki Rivers in Kenya. Bulletin Environmental Contamination & Toxicology 71, 298-307.

Lalah, J.O ., Schramm, K.-W., Henkelmann, B., Behechti, A., Severin, G.F., Lenoir, D., Guenther, K. and Kettrup, A. (2003). The bioaccumulation and fate of a branched 14C-nonylphenol isomer in Lymnaea stagnalis L. Environmental Chemistry Toxicology 22 (7), 1428-1436.

Lalah, J.O., Schramm, K.-W., Severin, G.F., Lenoir, D, Behechti, A., Guenther, K. and Kettrup, A., (2003): In vivo organ distribution and metabolism of a branched 14C-nonylphenol isomer in Lymnaea stagnalis L., Aquatic Toxicology 62 (4), 305-319.

Lalah, J.O., Severin, G.F., Schramm, K.-W., Lenoir, D., Henkelmann, B., Behechti, A., Guenther, K. and Kettrup, A. (2002). The fate of a branched p-nonylphenol isomer in Lymnaea stagnalis L. The Seventh Regional Meeting of the Central and Eastern European SECOTOX Section, Trends and Advances in Environmental Chemistry and Ecotoxicology. Book of Abstracts, ISBN 80-210-2971-4, Brno 2002: pp 184-188.

Severin, G.F., Lalah, J.O. and Schrammm K.-W. (2002). Effects of a nonylphenol isomer on the embryogenesis of the freshwater snail Lymnaea stagnalis L. The Seventh Regional Meeting of the Central and Eastern European SECOTOX Section, Trends and Advances in Environmental Chemistry and Ecotoxicology. Book of Abstracts, ISBN 80-210-2971-4, Brno 2002: pp 204-206.

Wandiga, S.O., Ongeri, D.M.K., Mbuvi, L., Lalah, J.O. and Jumba I.O. (2002). Accumulation, distribution and metabolism of 14C-p,p’-DDT residues in a model tropical marine ecosystem, J. Environmental Technology 23, 1285-1292.

Wandiga, S.O., Yugi, K., Barasa, M.W., Jumba, I.O. and Lalah, J.O. (2002). The distribution of organochlorine pesticide residues in marine samples along the Indian Ocean Coast of Kenya, J. Environmental Technology 23, 1235-1246.

Lalah, J.O ., Kaigwara, P.N., Getenga, Z.M., Mghenyi, J.M and Wandiga, S.O. (2001). The major environmental factors that influence rapid disappearance of pesticides from tropical soils in Kenya. Toxicological Environmental Chemistry 81, 167-197.

Lalah, J.O . (2002). Examining the pollution of water resources. In: Georg Foster Programm, Erfolgsbilanz der Ersten Fuenf Jahre (Alexander von Humboldt Annual Magazine).

Lalah, J.O . and Wandiga, S.O. (2001). The effect of boiling on removal of persistent malathion residues from stored grains, J. Stored Products Research 38 (1) : 1-10.

Lalah, J.O., Lenoir, D., Henkelmann, B., Hertkorn, N., Günther, K., Schramm K.-W. and Kettrup, A. (2001). Synthesis of ring- 14C-labelled 4(3´-, 6´-dimethyl-3´-heptyl)-phenol, J. Labelled Compounds and Radiopharmaceuticals 44, 459-463.

Lalah, J.O., Lenoir, D., Henkelmann, B., Hertkorn, N., Matuschek, G., Schramm K.-W., Günther, K. and Kettrup, A. (2001). Regioselective synthesis of a branched isomer of nonylphenol, 4(3´, 6´-dimethyl-3´-heptyl)-phenol, and determination of its important environmental properties, Chemistry – European J., 7, 4790-4795.

Lalah, J.O. and Wandiga, S.O. (1999). The metabolism and distribution of 14C-Phenyl-Ethyl Parathion in a tropical soil under field conditions. Toxicological & Environmental Chemistry 69 (3-4), 459-468.

Lalah, J.O., Wandiga, S.O. and Mbuvi L. (1995). Accumulation of 14C-DDT residues in fish (Dascillus Aruanus), oysters and sediments in a model marine ecosystem under laboratory conditions, In: Proceedings of the First Pan African Fisheries Congress on Sustainable Proceedings of the First Pan African Fisheries Congress on Sustainable Development of Fisheries in Africa, 31 st July-4 th August 1995, UNEP, Nairobi.

Wandiga, S.O., Mbuvi, L.N., Barasa, M.W., Ongeri, D.M.K. and Lalah, J.O. (1998). Distribution, Fate and Effects of Pesticides in Kenyan Marine Environment. In: Proceedings of the International Symposium on Marine Pollution, International Atomic Energy Agency, Monaco, 5-9 October, IAEA-SM-354.

Ongeri, D.M.K., Wandiga, S.O., Lalah, J.O. (1998). The distribution, metabolism and persistence of 14C-DDT and 14C-chlorpyrifos residues in sediment and fish in a model ecosystem. In: Proceedings of the 7 th Chemistry Conference in Africa and 34 th Convention of the South African Chemical Institute. 6-10 July, 1998. University of Natal, Durban, South Africa.

Lalah, J.O . and Wandiga, S.O. (1998). The fate and dissipation of surface applied 14C-DDE in a tropical soil. Toxicological & Environmental Chemistry 65, 9-16.

Lalah, J.O., Wandiga, S.O. and Dauterman, W.C. (1996). Mineralization, volatilization and degradation of Carbofuran in soil samples from Kenya, Bulletin Environmental Contamination & Toxicology 56, 37-41.

Lalah, J.O . and Wandiga, S.O. (1996). Adsorption/desorption and mobility of Carbofuran in soil samples from Kenya. Bulletin Environmental Contamination & Toxicology 56, 575-583 .

Lalah, J.O . and Wandiga, S.O. (1996). Distribution and dissipation of Carbofuran in a paddy field in the Kano plains of Kenya, Bulletin Environmental Contamination & Toxicology 56, 584-593.

Lalah, J.O . and Wandiga, S.O. (1996). Persistence and Fate of Malathion residues in stored beans (Phaseoulus Vulgaris) and maize (Zea Mays), Pesticide Science 46, 215-220.

Lalah, J.O ., Chien, C., Motoyama, N. and Dauterman, W.C. (1995). Glutathione S-transferases: -naphthyl acetate activity and possible role in insecticide resistance, J. Economic Entomology 88(4), 768-770.

Lalah, J.O., Acholla, F.V. and Wandiga, S.O. (1994). The fate of 14C-p,p´-DDT in tropical soil, J. Environmental Science Health B29 (1), 57-64.

Wandiga, S.O. and Lalah, J.O. (1992). The persistence of 14C-Malathion residues in beans (Phasoeulus Vulgaris) and maize (Zea Mays), In: Proceedings of the 5 th International Chemistry Conference in Africa, July 27-31 1992, Gaborone, Botswana.

Abbass, M.K., Bartle, K.D., Davies, I.L., Andrews, G.E., Williams, P.T. and Lalah J.O. (1990). The composition of the organic fraction of particulate emissions of a diesel engine operated on a vegetable oil. Society of Automotive Engineers, Warrendale, PA., SAE Paper No. 901563, 1990.

Abbass MK, Andrews GE, Asadi-Aghdam HR, Lalah JO, Williams PT, Bartle KD, Davies IL and Tanui LK (1989). Pyrosynthesis of PAH in a diesel engine operated on kerosene, Society of Automotive Engineers, Warrendale, PA., SAE Paper No. 890827, 1989.

 

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