Professor.(Mrs) R.M.R.P. Ratnayake

Associate Professor in Chemistry

Chemistry
Faculty of Natural Sciences
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Contact:

KRC, 3rd floor, Science and Technology building, Room No : W5

Office: 812494497, Ext: update later Mobile: NULL

Email: rurat@ou.ac.lk rukmalratnayake@yahoo.com


B.Sc. Chemistry Honours(University of Peradeniya, SL), Ph.D ((University of Peradeniya, SL)

Area of Specification:

Organic Chemistry, Natural Products

Research Intrests:

Organic Synthesis, Natural Products

Affiliations:

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Programmes Coordination:

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Course Coordination:

CHU 3130

CHU 3131

CMU 3120

Awards:

1. The Presidential Research Awards 2001. 2. 2002 Best paper at Annual Research Sessions, University of Peradeniya (Biological Sciences) Some Studies on the Genus Hortonia, (2002) H.E.M.D.K.Ekanayake, R.M.R.P. Ratnayake and N.L.V.V. Karunaratne. 3. The Presidential Research Awards 2008.

Researches:

1. Two New Lactones with mosquito larvicidal activity from three Hortonia species. Rukmal Ratnayake, Veranja Karunaratne, B.M. Ratnayake Bandara, Vijaya Kumar, Jhon. K. MacLoed and Peta Simmonds, J. Nat. Prod 2001, 64, 376-378.

2. Four butanolide derivatives from Hortonia species, a genus endemic to Sri Lanka. Ratnayake, Rukmal / Bandara, Ratnayake B M / Wijesundara, Siril A D / Carr, Gavin /Andersen, Raymond J / Karunaratne, Veranja, Journal of Chemical Research Part S Synopsis 2008, (3), 134-136.

3  Bioactivity and Chemistry of the genus Hortonia. Rukmal Ratnayake, B.M. Ratnayake Bandara,  Siril Wijesundara, Jhon. K. MacLoed, Peta Simmonds and Veranja Karunaratne, J. Nat. Prod Res. 2008;22(16):1393-402

4. Complete 2-D-assignment and antifungal activity of Ishwarane isolated from the genus Hortonia (2008) R. Ratnayake, S. Jayasinghe, R.J. Anderson and V. Karunaratne, J. National Science Foundation of Sri Lanka, 36 (1), 109-122

5. Hortonones A to C , hydroazulenons from the genus Hortonia.Gavin Carr†, David E. Williams†, Rukmal Ratnayake‡, Ratnayake Bandara‡, Siril Wijesundara§, Tamsin Tarling, Aruna D. Balgi, Michel Roberge, Raymond J. Andersen*†, and Veranja Karunaratne‡ J. Nat. Prod., 2012, 75 (6), pp 1189–1191

6. Evaluation of species limits of Hortonia by DNA barcoding Sanath Rajapakse, Prabasheeni Iddamalgoda, Rukmal Ratnayake, D.S.A. Wijesundara, B.M.Ratnayake Bandara, Veranja Karunaratne J.Natn.Sci.Foundation Sri Lanka 2012 40 (4): 345-349

7. Antioxidant activity  and a new butanolide from the primitive endemic genus Hortonia. Rukmal Ratnayake, Damith Perera, D. Nedra Karunaratne,D. Siril A. Wijesundara,Gavin Carr, David E. Williams, Raymond J. Andersen,Veranja Karunaratne J.Nat. Sci.Foundation Sri Lanka 2014 42 (3):253-256

Research Communications: Abstracts and Conference Proceedings

1. Butanolides from the genus Hortonia Rukmal Ratnayake, Veranja Karunaratne, B.M. Ratnayake Bandara, Vijaya Kumar, Jhon. K.  MacLoed and Peta Simmonds. Asian Symposium   on Medicinal Plants, species and other Natural   Products.  Dhaka, Bangladesh, 2000, P. 127.

2. A Phytochemical approach to the classification of genus Hortonia in Sri Lanka.Rukmal Ratnayake, Veranja Karunaratne, Vijaya   Kumar, B.M. Ratnayake Bandara, Siril Wijesundara, Sunethra Dharmasena, Aruna   Wijesooriya, M.D. Dassanayake.Proc., Sri Lanka Assoc. Adv. Sci. 54, pp 291-292, 1998.

3. Two New Lactones from three Hortonia species. V. Karunaratne, R. Ratnayake, B.M. Ratnayake Bandara and Vijaya Kumar. Proc., Sri Lanka Assoc. Adv. Sci. 55, pp 232-233, 1999.

4. New bio active compounds from the genus Hortonia. Rukmal Ratnayake, Veranja Karunaratne, B.M.Ratnayake Bandara and Vijaya Kumar. Proc., Sri Lanka Assoc. Adv. Sci. 56, pp 244, 2000.

5. Biochemical and Taxonomical investigation of genus Hortonia in Sri Lanka. R. Ratnayake, V. Karunaratne, V. Kumar, R.M.R. Bandara, S. Wijesundara, A. Wijesooriya, M.D. Dassanayake. Proc. Ann. Res. Sessions, Faculty of Science, University of Peradeniya, Sri Lanka. 1998, p. 25.

6. Two New  Mosquitolarvicidal Compounds from Three Hortonia sp., R. Ratnayake, V. Karunaratne, B.M.R. Bandara and V. Kumar., Proc. University of Peradeniya Annual Research Sessions, 1999, p. 22.

7. Some Studies on the Genus Hortonia,  H.E.M.D.K.Ekanayake, R.M.R.P.Ratnayake and N.L.V.V.Karunaratne,Proc. University of Peradeniya Annual Research Sessions, 2002, p.146.

8. Four new butanolide derivatives from the genus Hortonia.Rukmal Ratnayake, B.M. Ratnayake Bandara, D. Siril A. Wijesundara and Veranja Karunaratne, Proc., Sri Lanka Assoc. Adv. Sci. 64, 2008

9. Differentiation of Hortonia ovalifolia and Hortonia floribunda by DNA barcoding. Prabasheeni Iddamalgoda, Sanath Rajapakse, Rukmal Ratnayake, B.M.Ratnayake Bandara, D.S. A. Wijesundara and Veranja Karunaratne, Proc., Sri Lanka Assoc. Adv. Sci. 64, 2008

10. Three new tetrahydroazulene derivatives and one new butenolide derivative from Hortonia, a genus endemic to Sri Lanka. R. Ratnayake, S. Jayasinghe, B. M. R. Bandara, D. S. A. Wijesundara, G. Carr, R. J. Anderson and V. Karunaratne. Proc. University of Peradeniya Annual Research Sessions, 2009, p. 245.

11. Hortonia angustifolia does not contain DPPH antioxidant alkaloids. Damith Perera, Rukmal Ratnayake, D. N. Karunaratne, B. M. Ratnayake Bandara, D. S. A. Wijesundara, and Veranja. Karunaratne. Proc. University of Peradeniya Annual Research Sessions, 2009, p. 254.

Ongoing Research:

Isolation of bioactive compounds from genes Hertonia.

Research Supervisions:

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Publications:

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