1) Perera R.M.T.N, Alwis D.D.D.H, Photodegradation study of apo-carotenoid, crocetin extracted from saffron flower (Crocus sativus L.) stigma, 78th Annual sessions of Sri Lanka Association for the Advancement of Science 2022, Pending.
2) C.D. Jayasinghe, D.D.D.H. Alwis, L.A. Wijenayaka, D.T. Abeysinghe, D.D.G.L. Dahanayaka, U. A. Jayawardena, A Virtual career intervention to promote career readiness of BSc undergraduates of the OUSL, The International Open University Research sessions 2022 (i-OURS2022), The Open University of Sri Lanka, 2022, Accepted.
3) Perera R.M.T.N, Gunawardena J.A.S.U, Chandrika U.G, Alwis D.D.D.H, High Performance Liquid Chromatography – DAD analysis of apo-carotenoids presents in Saffron flower (Crocus sativus L.) stigma, The Open University Research sessions 2021 (OURS2021), The Open University of Sri Lanka, 2021, p 120.
4) Nayanakanthi Nilakarawasam, Radhika De Silva, Dusantha Alwis, Thejani Bulathwatta, Ransirini De Silva and Nimmi Dilsha. Developing a proactive motivational individual student support system at OUSL: A preliminary study for identification of influential factors, Proceedings of the 34th Annual Conference of Asian Association of Open Universities (AAOU2021) Colombo, Sri Lanka.
5) Alwis D.D.D.H., Abeysinghe D.T., Kumara K. A. H., Chandrika U.G. Analysis of major carotenoids and chlorophyll pigments present in the leaves of Clausena indica, 76th Annual sessions of Sri Lanka Association for the Advancement of Science 2020, p-161.
6) Abeysinghe T., Alwis D.D.D.H., Kumara, K.A.H., Chandrika U.G. In vitro assessment of antioxidant, antimicrobial and phytochemical screening of methanol leaf extract of micromelum minutum growing in Sri Lanka, PGIS Research Congress, University of Peradeniya, 2020, p-145.
7) Alwis D.D.D.H., Abeysinghe D.T., Kumara K. A. H., Chandrika U.G. Analysis of major carotenoids and chlorophyll pigments present in the leaves of micromelum minutum growing in Sri Lanka, The Open University Research sessions, The Open University of Sri Lanka, 2020, p-120.
8) Abeysinghe T., Kumara K.A.H., Alwis D.D.D.H., Chandrika U.G. In Vitro Assessment of Antioxidant, Antimicrobial and Phytochemical Screening of Crude Methanolic Extract of Leaves of Murraya koenigii Growing in Sri Lanka, 7th Ruhuna International Science and Technology Conference 2020, p-109.
9) Abeysinghe D.T., Kaushalya K.A.D., Kumara K.A.H., Alwis D.D.D.H. Comparison of proximate analysis and selected mineral element analysis of two major species of family Rutaceae, Muraya koenigii and Micromelum minutum, 75th Annual sessions of Sri Lanka Association for the Advancement of Science 2019, p-170.
10) Alwis D.D.D.H., Fernando D.D.T.H., Jayaweera P.M., Chandrika U.G., Abeysinghe D.T. UV-Vis absorption study of some carotenoids and their aggregrates extracted from natural plant materials, 75th Annual sessions of Sri Lanka Association for the Advancement of Science 2019, (p-183).
11) Abeysinghe D.T., Kumara K.A.H., Alwis D.D.D.H., Chandrika U.G. Assessment of proximate and mineral content of Clausena indica leaves in Sri Lanka 20th International Postgraduate Research Conference proceedings, University of Kelaniya, 2019, p-86.
12) Alwis D. D. D. H.; Bandarage, G.; Zoysa, M.N.K.De. Assessing the prior knowledge and thinking skills of students related to glassware in an undergraduate practical chemistry course, A preliminary study, 24th IUPAC International Conference on Chemistry Education (ICCE 2016), Malaysia 2016, TCE 04, Pg. 61.
13) Alwis D. D. D. H.; Chandrika, U. G.; Jayaweera, P. M., The Optical absorption spectra of Self-assembled aggregates of β-carotene. Proceedings of the Annual Academic sessions of the Open University of Sri Lanka, 2015, p 65-68.
14) Dusantha Alwis.; Dilru Ratnaweera.; Thusith Etampawala.; Mark Dadmun.; Udumalagala Chandrika.; Pradeep Jayaweera.; Self-Assembly of Carotenoids During Solution Casting of Solar Devices, American Physical Society MAR15 Meeting.2015, 60 (2).
15) Alwis D.D.D.H.; Chandrika, U.G.; Jayaweera, P. M., UV light induced photo-degradation study of carotenoids in MeOH: The influence of inorganic anions, ICMA proceedings of the international conference of multidisciplinary approaches, University of Sri Jayewardenepura Sri Lanka, 2014, p. 146.
16) Alwis D.D.D.H.; Chandrika, U.G.; Jayaweera, P.M. “Absorption and Emission Properties of Lycopene, β-Carotene, Norbixin and Their Chemically Oxidized Species, Annual sessions of the Institute of Chemistry Ceylon, Chemistry in Sri Lanka. 2013, 30 (2), p 13-14.
17) Alwis D.D.D.H.; Rathnayake, W.M.K.M.; Chandrika, U.G.; Jayaweera, P.M. A kinetics study of photodegradation of lycopene in water/acetone solutions, Proceedings of the 68th Annual Sessions of Sri Lanka association for advancement of science. 2012, p. 69.