Publications

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A human sperm motility stimulating sulfono glycolipid from marine red alga

Conference paper presentations / workshop attended
Premakumara, G.A.S., Ratnasooriya, W.D., Tillekeratne, L.M.V., Amarasekare, A.S. and Atta-Ur-Rahman
Publication year: 1994

Oxytocin suppresses motility of human spermatozoa in vitro

Journal Paper
Ratnasooriya, W.D. and Premakumara, G.A.S
Publication year: 1993

The effect of some natural quinonemethide and 14(15)-ene-quinone-methide nortriterpenoides on motility of human spermatozoa in vitro.

Journal Paper
Premakumara, G.A.S., Ratnasooriya, W.D., Balasubramanium, S., Dhanabalasingham, B., Fernando, H.C., Dias, M.N., Karunaratne, V. and Gunatilaka, A.A.L.
Publication year: 1992

Exploratory behavior of male rats treated with a crude extract of Ficus tsijela leaves

Journal Paper
Ratnasooriya, W.D, Premakumara, G.A.S. and Tillekeratne, L.M.V
Publication year: 1992

Effects of the prostanoid receptor antagonist, Di-4-phloretin phosphate, upon human sperm motility

Journal Paper
Ratnasooriya, W.D. and Premakumara, G.A.S.
Publication year: 1992

Antihypertensive properties of crude extract of Gracilaria  sp

Journal Paper
Ratnasooriya, W.D., Premakumara, G.A.S. and Tillekeratne, L.M.V
Publication year: 1992

The studies on the Alkaloids of Rauwolfia densiflora

Conference paper presentations / workshop attended
Weerakoon, S., Arambewela, L.S.R., Jayatissa, P.M., Weerawansa, G., Ratnasooriya, W.D. and Premakumara, G.A.S
Publication year: 1991

Sperm antimotility properties of seed exract of Abrus precatorius.

Journal Paper
Ratnasooriya, W.D., Amarasekare, A.S., Perera, N.S.D. and Premakumara, G.A.S
Publication year: 1991

Impairment of sperm motility with root extract of Ipomea marutiana

Journal Paper
Ratnasooriya, W.D., Amarasekare, A.S., Aberatne, V.D.K. and Premakumara G.A.S
Publication year: 1991

Sperm Antimotility properties of root extract of Ipomea mauritiana.

Conference paper presentations / workshop attended
Ratnasooriya, W.D., Amarasekare, A.S., Aberatne, V.D.K. and Pramakumara, G.A.S
Publication year: 1990

Some pharmacological and microbiological studies on Rauwolfia canescens

Conference paper presentations / workshop attended
Madawela, P.G., Arambewela, L.S.R., Jayatissa, P.M., Weerawansa, G., Ratnasooriya W.D. and Premakumara G.A.S
Publication year: 1990

Gastroprotective activity of crude extract of Jania sp.

Journal Paper
Ratnasooriya, W.D., Premakumara G.A.S. and Tillekeratne, L.M.V
Publication year: 1990

Antimotility effect of  Piper betle (L) leaf extract on washed human spermatozoa.

Journal Paper
Ratnasooriya, W.D., Jayawardana, K.G.G. and Premakumara, G.A.S
Publication year: 1990

Suppression of motility of human spermatozoa with crude extract of Piper betele (L) leaves

Conference paper presentations / workshop attended
Ratnasooriya, W.D., Premakumara G.A.S. and Liyanage G.K
Publication year: 1989

Sedative effect of the crude extract of Phyllidia varicosa on rats.

Conference paper presentations / workshop attended
Liyanage, G.K., Premakumara, G.A.S., Ratnasooriya, W.D., Tillekeratne, L.M.V. and De Silva, E.D
Publication year: 1989

Screening of red algae; Gelidium sp. and Gracilaria sp. for biological activity.

Conference paper presentations / workshop attended
Premakumara G.A.S
Publication year: 1989

Red algae as a potential source of antifertility agents: I. Effect of crude extract of Gelidium sp. on fertility of female rats

Conference paper presentations / workshop attended
Premakumara, G.A.S., Ratnasooriya, W.D. and Tillekeratne, L.M.V.
Publication year: 1989

Conference paper presentations / workshop attended
Ratnasooriya, W.D., Premakumara, G.A.S. and Liyanage G.K
Publication year: 1989

Inhibitory effect of D-glucose diethyldithioacetal on washed human spermatozoa

Journal Paper
Ratnasooriya, W.D., Munasinghe, V.R.N. and Premakumara G.A.S
Publication year: 1988
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