• Vibrational Modes of a Rabana (Drum) 

  Wijeratne, Agra T.; Peiris, M.G.C.; Dharmapriya, G.G. (1998)

  The vibrational modes of a "Virindu" Rabana membrane (of diameter 13 inches), which was driven by a loudspeaker, were studied by using a microphone.The vibrational modes were observed at frequencies below 500Hz. The nodal ...
• Trophic Status of Beira Lake 

  Nahallage, Charmalie; Piyasiri, Swarna (1998)

  Beira Lake is located in the heart of the city of Colombo.and in an highly urbanized catchment of 432 ha. Beira Lake covers 65.4 ha and comprises four main basins the East Lake, the Galle Face Lake, the West Lake and the ...
• Studies on Diel Feeding and Digestibility of Cyanobacteria 

  Kariyawasam, L.M.; Piyasiri, Swarna (1998)

  Beira Lake is eutrophic and covered with a bloom of Cyanobacteria. Hybrids of Oreochromis niloticus and Oreochromis mossambicus dominate the lake. Present study deals with feeding cycle and digestibility of the bloom by ...
• Seasonal Trends of Anopheles culicifacies Population and Its Sibling Species Status at Gomadiyagala-A Village in the North -western Province of Sri Lanka 

  de Silva, B.G.D.N.K.; Gunasekera, Maya B.; Abeywickreme, W.; Wickramasinghe, M.B.; Karunanayake, E.H. (1998)

  Anopheles culicifacies s.s and An. subpictus were the most predominant species found in this study area and accounted for 31.2% and 41.4% respectively of the total mosquitoes collected from the cattle - baited hut ...
• Preliminary Yield Assessment for Yellowfin and Skipjack Tuna Stocks Exploited by Sri Lanka's Coastal and Offishore Fleets 

  Sanders, M.J.; Joseph, Leslie (1998)

  This preliminary assessment utilised monthly catch and fishing effort data available for 1994. Estimates were made for the biomass recruiting to the fishery in each month. These were in turn used within a Thompson and ...
• Piper Betle Leaves Reversibly Inhibits Fertility of Male Rats 

  Ratnasooriya, W.D.; Premakumara, G.A.S. (1998)

  This study was undertaken to evaluate the effects of a water extract of mature leaves of Pital of betle on libido and fertility of male rats. The dose and treatment regimen used has been previously shown to inhibit male ...
• Phylogenetic Relationships of Fifteen Species of Cypriinids (Teleostei) of Sri Lanka, Based on Biochemical and Morphological Characters 

  Kotalawala, A.B. (1998)

  Phylogenetic relationships for tifteen species of Sri Lankan Cyprinids were revealed by the cladistic analysis of separate and combined biochemical and morphological characters. Different data sets yeilded different ...
• Impact of Kukule Ganga Hydro Power Project on Aquatic Fauna 

  Jinadasa, J. (1998)

  Results of the study indicated that Pelang Ganga and its tributaries carry less water. Some tributeries near water outfall are almost dry (eg. Dangolla Ela, near water outfall). Therefore, addition of 48m3/sec of water ...
• Immunomodulators from Medicinal Plants Used in Sri Lanka 

  Abeysekera, A.M. (1998)

  This paper reviews the results obtained from a collaborative research project between the University of Sri Jayewardenepura and the University of Utrecht to study munomodulating compounds from medicinal plants used in Sri ...
• Enhancement of Deproteinization of Hevea Rubber by Maturation of Papain Treated Hevea Latex 

  Yapa, P.A.J.; Fernando, W.S.E. (1998)

  Possibility of improving the quality low protein rubber obtained by papain treatment of Hevea latex was investigated. A new method for the production of high quality low protein rubber from field latex was developed. It ...
• Contents 

  Unknown author (1998)
• Biotechnological Approach in Weed Research-An Overview 

  Hirimburegama, K. (1998)

  Research on weeds has been reported extensively and in most cases traditional techniques have been used. But during the last two decades, emphasis has been given on the use of biotechnology in weed research. As a result, ...
• Anemotactic Reponses of the Male Oriental Fruit Fly, Dacus dorsalis to 2,3,5 Trimethyl Pyrazine in a Horizontal Wind Tunnel 

  Karunaratne, M.M.S.C. (1998)

  Anemotactic responses of the male oriental fruit fly Dacus dorsalis to 2,3,5 trimethyl pyrazine were studied using a horizontal wind tunnel. Various concentrations of the chemical compound had significant effects on the ...

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