Antimicrobial activities of endophytic fungi isolated from the aquatic plant Nymphaea nouchali (Nymphaeaceae) endemic to Sri Lanka, Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 2014, p 32.

D.M.R.K. Dissanayake, E.D. de Silva, R.L.C. Wijesundera, C.D. Wijayarathne

Antibacterial potential of endophytic fungal extracts from Rhododendron arboreum var. zeylanicum an endemic plant of Sri Lanka, Annual Sessions of the Institute of Biology, Colombo, Sri Lanka, 2014, p 34.

Senevirathna, H.D.A.A, De Silva, E.D., Wijayarathna, C.D., Wijesundara, R.L.C.

Antibacterial and antioxidant properties of Oldenlandia umbellata; 2014: 2^nd International Conference on Ayurveda, Unani, Siddha, and Traditional Medicine (ICAUST); Colombo, Sri Lanka. p 130.

K. K. Buddika, C. D. Wijayarathna, P. Soysa

Antibacterial activity of Oldenlandia umbellate, Annual Sessions of the Institute of Biology, Colombo, Sri Lanka, 2014, p 44.

Buddika, J. K. K., Wijayarathna, C. D., Soysa, P.

Study of Cu²⁺ Ion Tolerance Activity of Unknown Bacterial (P) Strain Isolated from Textile Dyeing Effluent, 2013. International Conference on Public Health Innovation, National Institute of Health Sciences, Sri Lanka – 2013, p78.

Pushpamalie, E.K. P., Wijayarathne, C. D., Wijesundara, W.S.S.

Molecular characterization of metal-resistant bacteria isolated from contaminated industrial effluent in Sri Lanka, Proceedings of the Sri Lanka Association of Advancement of Science (SLAAS), 69th annual sessions, 2013, p 175.
Kumari, W.M.N.H., Wijayarathna, C.D., Chandrasekharan, N.V.

Investigation of antimicrobial properties of endophytic fungi isolated from Neoclitsea cassia (Davul kurundu or wild cinnamon). 2013, International conference on herbal Technology, Sri Lanka. p 22

De Silva, E.D., Wijayarathna, C. D., Fernando, T. M. M., Senadeera, S. P. D., De Silva, P. G. S. M., Nicholas, I. H. V.

Evaluation of the antibacterial activity of the endophytic fungal extracts of Osbekia octandra L. (Melastomataceae) and endemic plant of Sri Lanka, Proceedings of the Sri Lanka Association of Advancement of Science (SLAAS), 69^th annual sessions, 2013, p 250.

Senevirathna, H.D.A.A, de Silva, E.D., Wijayarathna, C.D., Wijesundara, R.L.C.

Antimicrobial evaluation of endophytic fungi inhabiting Leucas zeylanica L. (Lamiaceae) endemic to Sri Lanka, Proceedings of the Sri Lanka Association of Advancement of Science (SLAAS) 69^th Annual sessions, 2013, p 103.

D.M.R.K. Dissanayake, E.D. de Silva, R.L.C. Wijesundera, C.D. Wijayarathne.

Optimization of alkaline comet (in vitro) and preliminary studies to evaluate genotoxicity of Flueggea leucopyrus wild (katupila), Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 2012, p 72.

Tirimanna, C.D. Wijayarathna, R. C. Deshani, N. M. D. T. M. Jayathilaka and N.V. Chandrasekeran

Bioactivities of Caryota urens (Kithul) treacle. Proceedings of 3^rd Biennial Conference of the South Asian Association of Physiologist (SAAP), 2012, p 69.

Ranasinghe, P., Premakumara G. A. S., Wijayarathna, C. D. and Ratnasooriya W. D.

Investigation of antibacterial active compounds in Vataria copallifera (Hal) seeds, Annual sessions of the Institute of Biology, Sri Lanka, 2011.p 17.

T.A.N. Siriwardena, E.D. de Silva, C. D. Wijayarathna.

Effect of α-tocopherol on stability of different grades of coconut oil, Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), p 75.

Sovis, W. A. S. M, Yalegama, L.L.W.C, Wijayarathna, C.D.

α –Glucosidase enzyme inhibitory activity and anti-hyperglycemic activity of Caryota urans L. (Kithul palm) treacle, Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 2010, p 32.

Ranasinghe, G.A.S. Premakumara, C.D. Wijayarathna, W.D.Ratnasooriya.

Isolation and mass culture of carotenoid producing yeast, Rhodotorula mucilaginosa from Caryota urens L sap. Proceedings of the 3^rd International Symposium of Sabaragamuwa University of Sri Lanka, 2010, p 57.

Ranasinghe, P., Premakumara, G.A.S, Wijayarathna, C.D, Ratnasooriya, W.D.

Determination of antibacterial activity of Vateria copolifera, International conference on natural products chemistry and its contribution to the economy, environment and the social well being, University of Peradeniya, Sri Lanka, 2010, pp 51-55.

S.P.D.Senadeera, C.D Wijayarathna.

Antioxidant activity of Vataria copallifera (Hal) extracts, Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 2010, p 98.

F.R. Haris, C.D. Wijayarathna, P. Ranasinghe, G.A.S. Premakumara.

Isolation of RNase E encoding gene from   Corynebacterium glutamicum, Annual Research Symposium, University of Colombo, Sri Lanka, 2008, p 116.

Rathnayake A. J. I.S., Wijayarathna C. D.

Isolation of microorganisms from an effluent sample having tolerance to different metal ions, Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 2008, p 273.

Karunaratne G.H.R.E., Wijayarathna C.D.

Anti-diabetic properties of Caryota urans (Kithul palm) sap and treacle, CHEMTECH, International Conference, Organized by the Institute of Chemistry, Sri Lanka, 2007, pp 185-188.

Ranasinghe, G.A.S. Premakumara, C.D. Wijayarathna, W.D. Ratnasooriya.

Free radical scavenging property of natural sweet sap of Kithul palm Caryota urens, proceedings of the 26^th annual sessions of the Institute of Biology, Sri Lanka, 2006, p 27.

P.Ranasinghe, G.A.S.Premakumara, C.D. Wijayarathna, W.D.Ratnasooriya.

Isolation of murE and ftsI genes from Corynebacterium glutamicum, 3^rd workshop on “Molecular Biology and Biotechnology”, organized by Association of East Asian Research University (AEARU), 1999.

C.D. Wijayarathna, M. Wachi, K. Nagai.

Mur C gene from Coryneform bacteria. 1998;  Japan Society for Bioscience, Biotechnology and Agro Chemistry, Nagoya, Japan, C.D.Wijayarathna, M.Wachi, K.Nagai.

Extractive-Spectrophotometric Determination of aluminium(III) by Ternary Complex Formation. 1994; SLAAS abstracts, H.D.Gunawardena, C.D.Wickramaarachchi.