Kumara, W.M.A.; Welianga, A.; Mahanama, K.R.R. [2014]. Development of a method to use gunshot residue as a forensic evidence to establish the shooter. Presented at the Annual Research Symposium 2014, University of Colombo, November 21, Colombo.

Premaratne, A.G.G.S.; Rajasinghe, S.L.; Mahanama, K.R.R. [2014]. Determination of Cr(VI) and other heavy metals in leather products of Sri Lanka. Presented at the Annual Research Symposium 2014, University of Colombo, November 21, Colombo.

Haniffa, M.A.C.M.; Senthilnithy, R.; Mahanama, K.R.R. [2014]. Contribution of organic contaminations and nutrient level on dynamic equilibrium of dissolved oxygen in water bodies of coastal belt of Ampara. Fourth international symposium 2014, SEUSL, August 02-03, Oluvil Sri Lanka.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2014]. Nutrition labelling of kithul (Caryota urnes) sap, treacle and juggery. Presented at the Annual Research Symposium 2014, University of Colombo, November 21, Colombo.

Wickramasinghe, D.D.; Ranwala, S.W.M; Mahanama, K.R.R.; Kaumal, M.N.: Kathriarachchi, H.; Hettiarachchi, C. [2013]. University, community and cooperate partnership: A study of service learning projects in the University of Colombo. Presented at the 69^th Annual Sessions of the Sri Lanka Association for the Advancement of Science, University of Kelaniya, December 02 – 06, Kelaniya.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2013]. Identification of treacle type by analysis of volatile components using head space-solid phase micro extraction – gas chromatography-mass spectrometry (HS-SPME-GC-MS). Presented at the Annual Research Symposium 2013, University of Colombo, October 03, Colombo.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2013]. Identification of treacle type by analysis of volatile components using head space-solid phase micro extraction – gas chromatography-mass spectrometry (HS-SPME-GC-MS). Presented at the Annual Research Symposium 2013, University of Colombo, October 03, Colombo.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Abeygunwardena, C; Mahanama, K.R.R. [2013]. Headspace-solid phase micro extraction-gas chromatography-mass spectrometric (HS-SPME-GC-MS) analysis of volatile components of Caryota urens L. (Kithul palm) treacle. Presented at the Young Scientists Forum Symposium 2013, January 18, Colombo.

Haniffa, M.A.C.M.; Senthilnithy, R.; Mahanama, K.R.R. [2013]. Effect of sodium concentration of inland water bodies related to paddy cultivated land in South Eastern region. Presented at the Third International Symposium, SEUSL, July 06 – 07, Oluvil Sri Lanka.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2013]. Analysis of volatile components of Caryota urenus L. (Kithul palm) treacle by head space – solid phase micro extraction – gas chromatography-mass spectroscopy (HS-SPME-GC-MS). Presented at the Annual Research Symposium 2013, Industrial Technology Institute, October 23 – 24, Colombo.

Haniffa, M.A.C.M.; Senthilnithy, R.; Mahanama, K.R.R. [2012]. Pollution on the selected stagnant water bodies South Eastern Sri Lanka. Presented at the Seventeenth International Forestry and Environmental Symposium, Department of Forestry and Environmental Science, University of Sri Jayewardenepura. November 16 – 17, Wattala.

Fernando, A.T.R.; Mahanama, K.R.R. [2012]. Investigation of the contribution of ambient ozone level to the asthma prevalence among the school children in Gampaha district. Presented at the Fifth National Symposium on Air Resource Management in Sri Lanka. May 11, Colombo.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2012]. Free amino acid profiles of Caryota urens L. (Kithul palm) sap, treacle and jiggery. Presented at the Annual Research Symposium 2012, University of Colombo, November 28, Colombo.

Damayanthi, A.D.M.; Amarakoon, A.M.T.; Mahanama, K.R.R. [2012]. Assessment of heavy metals in black tea produced in different agro-ecological regions of Sri Lanka. Presented at the Annual Research Symposium 2012, University of Colombo, November 28, Colombo.

Kathriarachchi, U.L.; Senevirathne, D.; Mahanama, K.R.R. [2012]. Analysis of benzoic acid and sorbic acid in some selected food items available in Sri Lanka. Presented at the Annual Research Symposium 2012, University of Colombo, November 28, Colombo.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Ranasinghe P. Mahanama, K.R.R. [2012]. A simple test kit for the detection of adulteration of Caryoto urens L. (kithul palm) sap and treacle with cane sugar. Presented at the Young Scientist Forum, National Science and Technology Commission. January 21, Colombo.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2011]. Free amino acid profile of kithul palm Caryoto urens L. treacle and its potential application in authentication of treacle types. Presented at the 12^th Government Food analysts Conference. February 22 – 24, Brisbane Queensland, Australia.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2010]. Free amino acid profile of Caryoto urens L. (kithul palm) treacle as a marker for authenticity. Presented at the Annual Research Symposium 2010, University of Colombo, May 12 – 13, Colombo.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2009]. Use of organic aids and polyphenolic compound profiles of Caryoto urens (kithul), Cocos nucifra (coconut) and Saccharum officinarum (sugar cane) treacles for the authentication of the treacle type. Presented at the 38^th Annual Sessions of the Institute of Chemistry, Ceylon, June 18 – 19, Colombo.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2009]. Nutrition composition of Kithul palm Caryota urens sap, treacle and juggery. Presented at Nutrition Society Sessions, January 24 – 25, Colombo.

Perera, P.S.F.; Mahanama, K.R.R. [2009]. Method validation and determination of Vitamin A and E in selected Sri Lankan consumable product items. Presented at Nutrition Society Sessions, January 24 – 25, Colombo.

Somasiri, H.P.P.S.; Premakumara, G.A.S.; Mahanama, K.R.R. [2008]. Organic acids and free sugar compounds of kithul palm (Caryota Urens) sap. Presented at the Asian Symposium on Medicinal Plants, Spices and other Natural Products XIII International Symposium, November 03 – 06, Hyderabad, India.

Perera, C.Y.P.; Mahanama, K.R.R. [2008]. An investigation of the adulterants in powdered chili samples. Presented at the Annual Research Symposium, University of Colombo, October 24, Colombo.

Gunasekara, M.M.N.B.; Wijegunasekara, J.K.A.B.; Mahanama, K.R.R. [2007]. Reduction of indoor exposures through the development of environmental friendly sample preparation methods. Presented at the 3^rd National Symposium on Air That We Breathe. Air Resource Management Center and Clean air Sri Lanka, September 28, Colombo.

Paramasivam, D.; Mahanama, K.R.R. [2007]. Carbonyl and phenol emissions from indoor combustion sources. Presented at the 3^rd National Symposium on Air That We Breathe. Air Resource Management Center and Clean air Sri Lanka, September 28, Colombo.

Pathiratne, S. M.; Mahanama, K.R.R. [2006]. Low birth weights of infants and exposure to smoke from biomass fuel during pregnancy. Presented at the 2^nd National Symposium on Air That We Breathe. Air Resource Management Center and Clean air Sri Lanka, March 17, Colombo.

Pathiratne, S. M.; Mahanama, K.R.R. [2006]. Low birth weights of infants and exposure to smoke from biomass fuel during pregnancy. Presented at the South Asia Regional Workshop on Indoor Air Pollution and Household Energy, February 27 – 28, Katmandu, Nepal.

Liyanage, A.D.T.; Jayawardana, K.G.S.; Jayaratne, R.N.R.; Amaratunga, C.K. Mahanama, K.R.R. [2006]. Investigation of trace metals in air particulate matter collected from Colombo. Presented at the International Forestry and Environment Symposium 2006 on Managing Natural Resources Towards Sustainable Development.  December 22 – 23, Wadduwa.

Kalutarage, L.C.; Mahanama, K.R.R. [2006]. Emission factors for selected PAHs and carbonyl compounds from locally available mosquito coils and joss sticks. Presented at the International Forestry and Environment Symposium 2006 on Managing Natural Resources Towards Sustainable Development. December 22 – 23, Wadduwa.

Astora, K.; Apte, M.G; Singer, B.C.; Destaillats, H.; Fisk, W.J.; Sextro, R.G.; Daisey, J.M.; Gundel, L.A.; Mahanama, K.R.R. [2005]. Addressing the challenges of exposure assessment for secondhand smoke. Presented at the 4^th World Assembly on Tobacco Counters Health, December 05 – 09, New Delhi, India.