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G.A.S. Premakumara
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Medicinal properties of ‘true’cinnamon (Cinnamomum zeylanicum): a systematic review
P Ranasinghe, S Pigera, GA Premakumara, P Galappaththy, ...
BMC complementary and alternative medicine 13 (1), 1-10, 2013
4292013
Effects of Cinnamomum zeylanicum (Ceylon cinnamon) on blood glucose and lipids in a diabetic and healthy rat model
P Ranasinghe, S Perera, M Gunatilake, E Abeywardene, N Gunapala, ...
Pharmacognosy Research 4 (2), 73, 2012
962012
In vitro erythrocyte membrane stabilization properties of Carica papaya L. leaf extracts
P Ranasinghe, P Ranasinghe, WPKM Abeysekera, GAS Premakumara, ...
Pharmacognosy research 4 (4), 196, 2012
872012
Sperm antimotility properties of a seed extract of Abrus precatorius
WD Ratnasooriya, AS Amarasekera, NSD Perera, GAS Premakumara
Journal of ethnopharmacology 33 (1-2), 85-90, 1991
801991
Antioxidant, anti-amylase and anti-glycation potential of brans of some Sri Lankan traditional and improved rice (Oryza sativa L.) varieties
GAS Premakumara, W Abeysekera, WD Ratnasooriya, ...
Journal of cereal science 58 (3), 451-456, 2013
622013
Antioxidant activity of water extract of Scoparia dulcis
WD Ratnasooriya, J Jayakody, GAS Premakumara, E Ediriweera
Fitoterapia 76 (2), 220-222, 2005
562005
Cinnamomum zeylanicum (Ceylon cinnamon) as a potential pharmaceutical agent for type-2 diabetes mellitus: study protocol for a randomized controlled trial
P Ranasinghe, P Galappaththy, GR Constantine, R Jayawardena, ...
Trials 18 (1), 1-8, 2017
432017
Adverse pregnancy outcome in rats following exposure to a Salacia reticulata (Celastraceae) root extract
WD Ratnasooriya, J Jayakody, GAS Premakumara
Brazilian Journal of Medical and Biological Research 36, 931-935, 2003
382003
Antioxidant activity of Caryota urens L.(Kithul) sap
P Ranasinghe, GAS Premakumara, CD Wijayarathna, WD Ratnasooriya
Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2012
332012
In vitro antioxidant properties of leaf and bark extracts of ceylon cinnamon (Cinnamomum zeylanicum Blume)
W Abeysekera, GAS Premakumara, WD Ratnasooriya
Postgraduate Institute of Agriculture, University of Peradeniya: Peradeniya, 2013
312013
Antimalarial properties of Artemisia vulgaris L. ethanolic leaf extract in a Plasmodium berghei murine malaria model
GS Bamunuarachchi, WD Ratnasooriya, S Premakumara, PV Udagama
Journal of vector borne diseases·, 2013
272013
Piper betle leaves reversibly inhibits fertility of male rats
WD Ratnasooriya, GAS Premakumara
271998
Post-coital contraceptive activity of crude extracts of Sri Lankan marine red algae
WD Ratnasooriya, GAS Premakumara, LMV Tillekeratne
Contraception 50 (3), 291-299, 1994
271994
Evaluation of pharmacodynamic properties and safety of Cinnamomum zeylanicum (Ceylon cinnamon) in healthy adults: a phase I clinical trial
P Ranasinghe, R Jayawardena, S Pigera, WS Wathurapatha, ...
BMC complementary and alternative medicine 17 (1), 1-9, 2017
262017
Antimotility effects of Piper betele (L.) leaf extract on washed human spermatozoa
WD Ratnasooriya, KGI Jayawardena, GAS Premakumara
Journal of the National Science Foundation of Sri Lanka 18 (1), 1990
261990
Proximate composition, calorie content and heavy metals (As, Cd, Pb) of selected Sri Lankan traditional rice (Oryza sativa L.) varieties
TI Kariyawasam, PI Godakumbura, MAB Prashantha, GAS Premakumara
Procedia food science 6, 253-256, 2016
222016
Isolation of a non-steroidal contragestative agent from Sri Lankan marine red alge, Gelidiella acerosa
GAS Premakumara, WD Ratnasooriya, LMV Tillekeratne
Contraception 54 (6), 379-383, 1996
221996
Piper betle leaves impairs masculine sexual behaviour of rats
HW Ratnasooriya, GAS Premakumara
Medical science research 24 (5), 303-306, 1996
211996
Studies on the post-coital contraceptive mechanisms of crude extract of Sri Lankan marine red algae, Gelidiella acerosa
GAS Premakumara, WD Ratnasooriya, LMV Tillekeratne
Contraception 52 (3), 203-207, 1995
171995
An investigation of the antimalarial activity of Artemisia vulgaris leaf extract in a rodent malaria model
K Kodippili, WD Ratnasooriya, S Premakumara, PV Udagama
International Journal of Green Pharmacy (IJGP) 5 (4), 2011
162011
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Articles 1–20