Ranasinghe, M.H.; Mahanama, K.R.R. [2004]. Risk of cataract formation with exposure to biomass smoke. Presented at the 1^st National Symposium on Air That We Breathe.  Air Resource Management Center and Clean Air Sri Lanka, December 02 – 04, Colombo.

Ratnayake, W.M.S.R.; Dissanayake, D.P.; Mahanama, K.R.R. [2004]. Investigations on the phtocatalytic degradation of sulphur pollutants using ZnO. Presented at the 1^st National Symposium on Air That We Breathe. Air Resource Management Center and Clean Air Sri Lanka, December 02 – 04, Colombo.

Wickramarachchi, D. S. M.; Mahanama, K.R.R. [2004]. Investigation the correlation between dissolved oxygen and dissolved sulfur compounds. Presented at the 33rd Annual Sessions of Institute of Chemistry, Ceylon, June 23 – 25, Colombo.

Perera, M.A.K.K.P.; Mahanama, K.R.R. [2004]. Investigation of lung cancer to human activities in Sri Lanka. Presented at the 1^st National Symposium on Air That We Breathe.  Air Resource Management Center and Clean Air Sri Lanka, December 02 – 04, Colombo.

Kulathunga, D.R.; Pandithavidana, D.; Mahanama, K.R.R. [2004]. Fingerprinting diesel and petrol fuels for adulteration. Presented at the 1^st National Symposium on Air That We Breathe.  Air Resource Management Center and Clean Air Sri Lanka, December 02 – 04, Colombo

Mahanama, K.R.R. [2004]. Cooking or being cooked; A review on health and environmental issues due to combustion of biomass fuels. Presented at the 1^st National Symposium on Air That We Breathe. Air Resource Management Center and Clean Air Sri Lanka, December 02 – 04, Colombo.

Mahanama, K.R.R. [2002]. Supercritical fluids. Are they super? A review paper presented at the 31st Annual Sessions of Institute of Chemistry, Ceylon, June 23 – 25, Colombo.

Pandithavidana, D.; Mahanama, K.R.R. [2002]. Development of an environment friendly method to remove the colored components from industrial waste. Presented at the 8th Annual Sessions of Forestry and Environmental Symposium, December 10 – 11, Beruwala.

Muianga, C.V.; Mahanama, K.R.R. [2002]. Determination of detection limit for S₂F₁₀ in SF₆ by gas chromatography with electron capture detection. Presented at the 3^rd Associate Programme, Organization for the Prohibition of Chemical Weapons, September 26, Dan Hague, The Netherlands.

Kulathunga, D.R.; Mahanama, K.R.R. [2001]. Investigation of leaded petrol and diesel adulteration in Sri Lanka. Presented at the 7th Annual Sessions of Forestry and Environmental Symposium, December 28 – 29, Gangodawila.

Wijesinghe, L.P.R.J.; Pathmasiri, D.D.N.; Mahanama, K.R.R. [2001]. Fish uptake and Levels of Cr, Cu, Cd, Ni, Pb and Zn in Beire Lake water. Presented at the 7th Annual Sessions of Forestry and Environmental Symposium, December 28 – 29, Gangodawila.

Udawatte, U.N.P.; Mahanama, K.R.R. [2001]. Design and construction of a low cost smoking machine for tobacco smoke generation and demonstrating the smokers’ intake. Presented at the 7th Annual sessions of Forestry and Environmental Symposium, December 28 – 29, Gangodawila.

Pannawennage, D.P.; Dissanayake, D.P.; Mahanama, K.R.R. [2000]. Selective extraction of carcinogenic precursors from diesel. Presented at the 1^st Annual Sessions of the Faculty of Science, University of Colombo, December 13, Colombo.

Kularatne, K.I.A.; Mahanama, K.R.R. [2000]. Investigation of sulfur compounds in selected stagnant water bodies. Presented at the 6th Annual Sessions of Forestry and Environmental Symposium, December 29 – 30, Kandy.

Gundel, L.A.; Mahanama, K.R.R.; Apte, M.G.; Herring, A. S.V.; VanLoy, M.D.; Daisey, J.M. [1999]. Dynamic behavior of polycyclic aromatic hydrocarbons in environmental tobacco smoke: Effects of aging and temperature variation on phase and size distribution. Presented at the 8th International Conference on Indoor Air Quality and Climate, August 08 – 13, Edinburgh, Scotland.

Hettige, C.; Jayathilaka, G.D.I.P.; Mahanama, K.R.R.; Dissanayake, D.P. [1998]. Effect of MgO on carbon deposition over a Ni/Al₂O₃ catalyst. An investigation by FTIR. Presented at the 54th Annual sessions of the Sri Lanka Association for the Advancement of Science, December 14 – 19, University of Sri Jayewardenepura, Gangodawila.

Kularatne, K.I.A.; Mahanama, K.R.R. [1998]. Construction of a low cost air sampler and its application in sampling volatile carbonyl compounds. Presented at the 4th Annual Sessions of Forestry and Environmental Symposium, December 03 – 04, Beruwela.

Wijesinghe, L.P.R.J.; Mahanama, K.R.R. [1998]. A solution to scaling problems and operational difficulties in Mihintale drinking water supply scheme.  Presented at the National Water Conference, November 04 – 06, Colombo.

Thiyakesan, A.; Dissanayake, D.P.; Mahanama, K.R.R. [1997]. Development of low cost sampling and analytical method to determine polycyclic aromatic hydrocarbons in air. Presented at the 53rd Annual Sessions of the Sri Lanka Association for the Advancement of Science, December 08 – 12, University of Ruhuna, Matara.

Hodgson, A.T.; Daisey, J.M.; Alvenatis, L.E.; Mahanama, K.R.R.; Ten Brinke J. [1996]. Use of volatile tracers to determine the contribution of environmental tobacco smoke to concentrations of volatile organic compounds. Presented at the 7^th International Conference on Indoor Air Quality and Climate, July 21 – 26, Nagoya, Japan.

Daisey, J.M.; Mahanama, K.R.R.; Hodgson, A.T. [1996].  Indoor exposures to air toxics in environmental tobacco smoke.  Presented at the joint meeting of the Society for Risk Analysis and the International Society of Exposure Analysis, December 08 – 12, New Orleans, Louisiana, USA.

Gundel, L.A.; Lee, V.C.; Mahanama, K.R.R.; Daisey, J.M.; Lane, D.A. [1994].  Phase distribution of polycyclic aromatic hydrocarbons and other semi volatile compounds. Presented at the 5th International Conference on Carbonaceous Particles in Atmosphere, August 23 – 26, Berkeley, California, USA.

Gundel, L.A.; Mahanama, K.R.R.; Daisey, J.M; Schuetzle, D.; Zinbo, M.; Kado, N.Y.; Carvalho, L.R.F.de; Gennings, C.; Tuckey, J. [1994].  New bioassay-directed chemical analysis approaches for assessing synergistic biological effects of air pollutants.  Presented at the 45th Pittsburgh Conference, February 28 – March 04, Chicago, Illinois, USA.

Daisey, J.M.; Mahanama, K.R.R.; Hodgson, A.T. [1994].  Indoor air: Air toxics from environmental tobacco smoke.  Presented at the 5th Annual West Coast Regional Specialty Conference on Current Issues in Air Toxics, November 09 – 10, Sacramento, California, USA.

Daisey, J.M; Mahanama, K.R.R.; Phan, T.; Hodgson, A.T. [1994].  Exposure to air toxics from environmental tobacco smoke.  Presented at the 4th joint meeting of the International Society for Environmental Epidemiology and the International Society for Exposure Analysis meeting, September 18 – 21, Research Triangle Park, North Carolina, USA.

Lee, V.C.; Gundel, L.A.; Mahanama, K.R.R.; Nematollahi, A.R.; Sextro, R.G.; Daisey, J.M. [1994].  Environmental chamber studies of the fate of nicotine: Phase distribution, aging and wall deposition.  Presented at the 12th Annual Meeting of the American Association for Aerosol Research, August 28 – September 03, Los Angeles, California, USA.

Gundel, L.A.; Mahanama, K.R.R.; Carvalho, L.F.R. de; Daisey, J.M. [1994].  Chemical characterization of polar organic matter in airborne particles.  Presented at the 5th International Conference on Carbonaceous Particles in Atmosphere, August 23 – 26, Berkeley, California, USA.

Goth-Goldstein, R.; Leadon, S.A; Levine, G.; Mahanama, K.R.R.; Tischler; A.N. [1993]. Indirect and direct genotoxic effects of tobacco smoke condensate on human mammary cells in culture.  Presented at the 1st Annual Scientific Conference of the Tobacco-related Disease Research Program, December 02 – 03, San Francisco, California, USA.

Gundel, L.A.; Daisey, J.M; Mahanama, K.R.R.; Lee, V.C.; Stevens, R.K. [1993].  The phase distribution of polycyclic aromatic hydrocarbons in indoor air and environmental tobacco smoke measured with a new integrated organic vapor sampler. Presented at the 6th International Conference on Indoor Air Quality and Climate, June 06 – 10, Helsinki, Finland.

Gundel, L.A.; Mahanama, K.R.R.; Daisey, J.M.; Lee, V.C.; Stevens, R.K. [1993].  Direct measurement of gas-phase semi-volatile polycyclic aromatic hydrocarbons collected on annular denuders.  Presented at the International Symposium on Measurement of Toxic and Related Air Pollutants, May 04 – 07, Durham, North Carolina, USA