Isolation of promoter (Pcop) and regulator (csoR) of the cop operon of Staphylococcus epidermidis TWSL_22 for construction of heavy metal biosensor. International Conference on Environmental Governance, Central environmental authority of Sri Lanka, 2021, p 38.

De Silva M.N.T. & Wijayarathna, C.D.

Invitro acetylcholinesterase inhibitory activity of Walidda antidysenterica, Centratherrum punctatum and Vernonia cinerea. Proceedings of the Young Scientist Conference on Multidisciplinary Research, young Scientists’ Association, National Institute of Fundamental Studies, Sri Lanka, 2021, p 96.

S. De Silva, Wijayarathna, C.D., H. I. C. De Silva

Evaluation of Heavy Metal Bioremediation Potential of coli BL21 Cloned with cadD and Metallothionein Genes, International Conference on Environmental Governance, Central environmental authority of Sri Lanka, 2021, p 40.

Dissanayake D.M.D.C., Priyadarshini P.M.M., Fernando S.T.K.K., Chandrasekharan N.V.,Wijayarathna, C.D

Development of Recombinant Bacterial Strains for Effluent Metal Bioremediation, International conference on multidisciplinary approaches in science, Faculty of Science, University of Colombo 2021, p 65.

Kumari, W.M.N.H., Wijayarathna, C.D., Chandrasekharan, N.V.

Development and characterization of an amperometric biosensor using Metallothionein for identification and quantification of lead (Pb²⁺) ions. Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 77^th annual sessions, 2021, p 76.

C. Goonethileke, C. D. Wijayarathna, Hasini R. Perera.

Aspergillus flavus homologs of prokaryotic long chain-alkane monooxygenase, LadA. 16^th Congress of the Federation of Asian and Oceanian Biochemists and Molecular Biologists, (FAOBMB), Christchurch, New Zealand, 2021, p 122.

Madushika Perera, Sulochana Wijesundera, C D Wijayarathna, Gamini Seneviratne, Sharmila Jayasena.

Optimization of a western blot-based extracellular signal-regulated kinase 1/2 (ERK1/2) activation assay to detect sphingosine 1-phosphate receptor 1 activation in mammalian cells. Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 76^th annual sessions, 2020, p 154

WWJG Perera, CD Wijayarathna, DR Herr, JPT Jayakody.

Metal bioremediation ability of Staphylococcus warneri TWSL_6 and cloning and expression of Metallothionein in coli. Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 76^th annual sessions, 2020, p 93.

SD Liyanage, WMNH Kumari, C. D. Wijayarathna.

Analysis of crude extracts of Crateva adansonii (Lunuwarana) bark on renal calculi. Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 76^th annual sessions, 2020, p 163.

GTN Deshapriya, CY Liyanage, CD Wijayarathna.

High efficiency degradation of crude oil by Aspergillus MM1, 27^th FAOBMB & 44^th annual MSBMB conference, Kuala Lumpur, 2019, p 263.

Perera S.M.D., Chinthaka S.D.M., Wijayarathna C.D., Wijesundera W.S.S., Seneviratne G. and Jayasena S.M.T

Cloning of Opsin encoding gene from selected frog species in Sri Lanka. Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 75^th annual sessions, 2019, p 76.

T.K.W.D. Jayarathne, D.A.D.N. Jayathunga, H.D.K.G.A. Weerakoon, A. Karunarathne, C.D. Wijayarathna.

Identification of metallothionein gene in Staphylococcus warneri strain G isolated from industrial effluent in Sri Lanka, proceedings of 5^th Ruhuna International Science & Technology conference, 2018, p 11.

Edirisinghe S.N.J, Kumari W.M.N.H, Wijayarathna C.D.

Identification of genes encoding heavy metal transporting proteins in selected bacteria of an effluent, Proceedings of 5^th Ruhuna International Science & Technology conference, 2018, p 75.

Chathurika K.P.R, Kumari W.M.N.H, Wijayarathna C.D

Biodegradation of crude oil by natural microbial communities comprising Aspergillus and Bacillus sp, 2018, Proceedings of the first bi-annual conference 2018 – CBSL, p 20.

Perera, S.M.D., Wijayarathna, C.D., Wijesundera, W.S.S., Seneviratne, G., Jayasena, S.M.T.

Phylogenetic identification of Caryota (Kithul) strains using DNA barcoding, 10^th International Research Conference of General Sir John Kotelawala Defence University Rathmalana Sri Lanka, 2017, p 53

Kumari, K A.C., Wijewantha W.W.S.R, Wijayarathna C.D.

Phylogenetic analysis of gram-negative heavy metal tolerant bacterial strains isolated from a textile industrial effluent in Sri Lanka, Proceeding of the International Conference on Innovations in Chemical, Biological and Environmental Sciences (ICBES-2017) Pattaya (Thailand), 2017, p39, ISBN: 97893-84468-96-5.

Kumari, W.M.N.H., Wijayarathna, C.D., Chandrasekharan, N.V.

PCR based identification of cadmium resistant determinants in Bacillus megaterium strain TWSL-4, Proceeding of the 2nd International Conference Bio Science and Biotechnology (Biotech 2017), Colombo (Sri Lanka), p17, ISBN: 978-955-4903-70-8

Kumari, W.M.N.H., Wijayarathna, C.D., Chandrasekharan, N.V.

Investigation of Cu²⁺ tolerance in Bacillus flexus strains isolated from an industrial effluent in Sri Lanka. Proceedings of the 2^nd International Conference Bio Science and Biotechnology (Biotech 2017), Colombo (Sri Lanka), p 27, ISBN: 978-955-4903-70-8

Ruvindi de Silva, Wijayarathna, C.D & Kumari, W.M.N.H.

Phylogenetic analysis of rod-shaped heavy metal tolerant bacterial strains isolated from a textile industrial effluent in Sri Lanka, Proceeding of the Annual Research Symposium-University of Colombo, 2016, p 278.

Kumari, W.M.N.H., Wijayarathna, C.D., Chandrasekharan, N.V.

Isolation of n-hexadecane degrading natural microbial communities, Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 2016, p 59.

Perera, S.M.D., Chinthaka, S. D. M., Seneviratne, G., Wijesundera, W.S.S., Wijayarathna, C.D., Jayasena, S.M.T.

Evaluation of hexadecane biodegradation by a natural microbial biofilm over single cultures of its counterparts, Annual Research Symposium, University of Colombo, Sri Lanka, 2016, p 284.

Perera, S.M.D., Chinthaka, S. D. M., Seneviratne, G., Wijesundera, W.S.S., Wijayarathna, C.D., Jayasena, S.M.T.

Characterization of two heavy metal resistant Bacillus strains found from Sri Lanka into species level, Proceeding of the Sri Lanka Association of Advancement of Science (SLAAS), 2016, p 56.

Kumari, W.M.N.H., Wijayarathna, C.D., Chandrasekharan, N.V.

Antioxidant properties of different stages of maturity of widely cultivated tomato (Lycopersicon esculentum) varieties in Sri Lanka, Proceedings of the 36th Annual Sessions of the Institute of Biology, 2016, p 25.

H.H. Iflal, W.K.S.M. Abeysekera, R.C. Pitipanaarachchi, M.D.G.S. Perera, S.G. Walliwala, I.G.N. Hewajulige, C.D. Wijayarathna.

Antibacterial activity of endophytic fungi isolated from Salacia reticulate; 2016, 4^th International Conference on Ayurveda, Unani, Siddha, and Traditional Medicine (ICAUST); Colombo, Sri Lanka. p125.

V.N. P. Gunaratne, R. H. N. R. Kularathna, C. D. Wijayarathna, E. D. de Silva

Investigation of antibacterial properties of endophytic fungi isolated from Nymphaea nouchali endemic to Sri Lanka and the isolation of Chaetoglobosin C from the endophytic Chaetomium sp. Proceedings of the Young Scientist forum of Sri Lanka (YSF) 4^th Annual sessions, 2015, pp 57 – 60.

D.M.R.K. Dissanayake, Pamoda B. Ratnaweera, David E. Williams, E.D. De Silva, C.D. Wijayarathne, R.L.C. Wijesundera, Raymond J. Andersen

Antimicrobial potential of the endophytic fungal extracts of Mangifera zeylanica (Anacardiaceae), an endemic plant of Sri Lanka, against selected pathogenic bacterial species, Proceedings of the Institute of Biology Sri Lanka (IOBSL), 2015, p 58.

H.D.A.A Senevirathna, E.D. de Silva, C.D. Wijayarathne, R.L.C. Wijesundera,

Study of Copper ion bio-remediation activity of the unknown bacterial (P) strain, OUSL Annual Academic Sessions, Open University of Sri Lanka, 2014, pp 337 – 341.

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

Mycoleptodiscin B, an antimicrobial alkaloid from Mycoleptodiscus sp. endophytic in Calamus thawaitesii (Arecaceae), Proceedings of the Annual Research Symposium-University of Colombo, 2014, p 224.

D.M.R.K. Dissanayake, Pamoda B. Ratnaweera, David E. Williams, E.D. De Silva, C.D. Wijayarathne, R.L.C. Wijesundera, Raymond J. Andersen

Investigation of the antimicrobial potential of the endophytic fungal extracts of Mangifera zeylanica (Anacardiaceae), an endemic plant of Sri Lanka, Annual sessions of the Institute of Biology, Sri Lanka, 2014. p 58.

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

Antimicrobial activities of organic extracts of endophytic fungi isolated from Calamus thwaitesii (Arecaceae) endemic to Sri Lanka, Annual sessions of the Institute of Biology Sri Lanka (IOBSL), 2014, p 51.

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