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9Th Ysf Symposium 9TH YSF SYMPOSIUM 13th November 2020 Organized by Young Scientists Forum National Science and Technology Commission Chief Editor Dr. D.M.S.B. Dissanayaka Editorial Board Prof. U. Hettiaratchi Dr. D. Attygalle Dr. K. Meegahakumubura Dr. L.K. Weerasinghe Dr. U.S. Liyanaarachchi Ms. E.M.S. Isanka Mr. N.Y. Jayanath © National Science and Technology Commission Responsibility of the content of papers included in this publication remains with the respective authors but not the National Science and Technology Commission. ISBN: 978-955-8630-14-3 Published by: National Science and Technology Commission, 6th Floor, Wing D, Sethsiripaya Stage II, Battaramulla www.nastec.gov.lk Steering Committee Members - Young Scientists Forum National Science and Technology Commission Chairperson Dr. L.K. Weerasinghe Joint Secretaries Dr. U.S. Liyanaarachchi Dr. K. Meegahakumbura Committee Members Prof. R. Halwatura Prof. U. Hettiaratchi Dr. S. Samarakoon Dr. J. Wijesinghe Dr. N. Withanage Dr. D. Attygalle Dr. K. Pakeerathan Dr. D.M.S.B. Dissanayaka Mr. N.Y. Jayanath Ms. E.M.S. Isanka NASTEC Coordinator Ms. M.D. Thilini Table of Contents Massage from the Chairperson, National Science and Technology i Commission Massage from the Acting Director, National Science and Technology ii Commission Massage from the Steering Committee Chairperson, Young Scientists iii Forum Foreword from the Editors iv EXTENDED ABSTRACTS Focus Area: Basic Sciences, Emerging Technologies & Indigenous Knowledge Antimicrobial activity of leaf extracts of Litsea iteodaphne (“Kalu Nika”) 1 against clinical isolates of Methicillin resistant Staphylococcus aureus U.G.S. Janesha, M.R.P. Hasanga, R.P. Hewawasam, W.M.D.G.B. Wijayaratne Acute and sub-acute toxicity study of Acronychia pedunculata leaves 6 W.M.K.M. Ratnayake, T.S. Suresh, A.M. Abeysekera, N. Salim, U.G. Chandrika Evaluation of photoprotective potential of sunscreen formulations 11 prepared from Leucas zeylanica (Gatathumba) extract C.E. Liyanaarachchi, M. Napagoda, S. Witharana, L. Jayasinghe Variation of phytochemical profile of Cinnamomum zeylanicum according 14 to different environmental conditions K.T.S. Madhushika and V.P. Bulugahapitiya In-silico investigation of inhibitory efficacy of selected hydroxamic acid 19 derivatives on histone deacetylase enzyme R. Dushanan, S. Weerasinghe, D. P. Dissanayake, R. Senthilnithy Investigation of the impact of Cd (II) ion on human uracil DNA glycosylase: 25 an in-silico approach G.M.P.R. Paligaspe, S. Weerasinghe, D.P. Dissanayake, R. Senthilnithy Spectroscopic determination of chemical elements on abundantly available 31 five leaf types in tropics M.S. Mendis, R.U. Halwatura, D.R.K. Somadeva, R.A. Jayasinghe Feasibility of incorporating Biyagama drinking water treatment plant solid 37 sludge in a construction material production process G.A.H.H. Galkanda and R.U. Halwatura Phytochemicals present in leaves of locally grown guawa varieties; Psidium 42 guajava (common guava), Psidium cattleianum (strawberry guava) and Psidium guineense (embul guava) under different extraction technique S. Kokilananthan, V.P. Bulugahapitiya, C.S. Gagabadage ARIMA models over dengue cases reported in Colombo and Jakarta 46 A.M.C.H. Attanayake, S.S.N. Perera, U.P. Liyanage Comparison of forecasting methods of hedge ratios for stock market index 52 prices in Sri Lanka D.F.S.N. Perera, U.P. Liyanage, D.M.P.V. Dissanayaka Formulation of micro encapsulated rutin and evaluation of bioactivity and 59 stability upon in vitro digestive and dialysis conditions M.M.R.D. Mel and K.D.P.P. Gunathilake Characterization of manufactured aggregated porous media as plant 63 growth substrates J.R.R.N. Jayarathne, T.K.K.C. Deepagoda, M.C.M. Nasvi, K. Smits Effect of anodization voltage and time on the structure of TiO2 nanotube 69 arrays V.W.S.G. Rathnayaka, H.D. Rajapakse, H.S. Sitinamaluwa Development of a reliable method to quantify the solderability of lead- 75 free solder on nichrome alloy A Kumarasiri, D. Attygalle, D.A.S Amarasinghe Integrating customer requirements with product design in the 81 development of customer orientation: a case study of glove manufacturing in Sri Lanka P. Selvarajah, B.D.S Madushani, H.M.T.U. Abeyrathna, L.G. De Sliva Photocatalytic and self-cleaning TiO2 coating on clay roofing tiles 87 S.T. Amarasinghe and H.C.S. Perera Optoelectronic displacement sensor and encoder based hybrid approach 93 for mobile robot odometry W.A.D.P.B. Senarathne, H.T.D.S. Madusanka, U.S. Liyanaarachchi, M.K. Jayananda Dissolved contaminant transport in homogeneous and differently-layered 99 geosystems: an experimental and numerical investigation M. Shanujah, T.K.K.C. Deepagoda, M.C.M. Nasvi, K. Sajitha, V. Kajaroopan Focus Area: Energy Optimum design improvements for live line inspection robot for 33 kv 106 tower lines S.R. Dewanarayana and R.H.G. Sasikala Optical characteristics of cupric oxide nanoparticles prepared by hydrolysis 115 of copper acetate using triethylamine G.C. Wickramasinghe, V.P.S. Perera, R. Senthilnithy Technical and environmental feasibility of co-firing torrefied biomass in a 119 300 MWe coal-fired power plant S.D.S. Supunsala, U.M.A. Devaraja, R.M.D.S. Gunarathne Focus Area: Environment Habitat-cover assessment in the Kumana national park, Sri Lanka using 126 multi temporal satellite data R.H. Kasige, D.U.J.J. Niroshan, A.H.L.C.M. Athapaththu, M.R. Wijesinghe Assessment of phytoplankton community structure and species diversity in 130 Diyawannawa wetland D.B.M. Nanayakkara and W.M.D.N. Wijeyaratne Chromosomal abnormalities induced by the treated textile effluents 135 P.G.M.U. Wickramasinghe and W.M.D.N. Wijeyaratne Association between the abundance of buffaloes and nutrient levels in 139 water holes in the Kumana national park, Sri Lanka S.U.M. Fernand, V.S. Kulatunga, M.R. Wijesinghe Evaluation of heavy metal dissolution mechanisms for battery industrial 144 sludge V. Gunarathne, A.U. Rajapaksha, A. Cooray, M. Vithanage Abundance and richness of arbuscular mycorrhizal fungi in Dicranopteris 149 linearis dominated lands in buffer zone of Kanneliya forest reserve, Sri Lanka U.G.T.D. Kariyawasam, B.L.R.E. Liyanage, P.M.C.J. Bandara, H.M.S.P. Madawala Focus Area: Food, Nutrition and Agriculture Quantification of TPC and TFC of flowers and leaves of Chinese hibiscus 154 (Hibiscus rosa-senesis) in Sri Lanka M.S. Adila and S. Dias Screening okra (Abelmoschus esculentus) germplasm for yellow vein 158 mosaic virus disease resistance A.S. Jathunarachchi, P.I.P. Perera, M.C.J. Premaratne Comparative study on the oxidative stability of coconut oil and sesame 164 oil and their blends B. Nivethini, S. Sivakanthan, S. Vasantharuba Biotic risks, pesticide usage and awareness on IPM techniques in paddy 169 cultivation in Polonnaruwa district of Sri Lanka W.D. Samudhika, K. Prasannath, G. Hariharan Seedling transformation of Anthurium andraeanum Linden Ex Andre 174 using Agrobacterium tumefaciens carrying a GUS reporter T.T.D. Dahanayake and S. Geekiyanage Investigation of hydroxyapatite nanoparticles toxicity on Raphanus sativus 177 N.H. Madanayake, N.M. Adassooriya, N. Salim Evaluating the effectiveness of a video-documentary as a tool to promote 182 climate smart agricultural practices among farming communities in Sri Lanka M.A.H.T. Madurasinghe and K.P.P. Kopiyawattage Allelopathic effects of selected plant extracts on the growth of yellow 186 nutsedge (Cyperus esculentus L.) U.J. Begam, S. Srikrishnah, S. Sutharsan Selected plant pathogenic fungal culture filtrates (secondary metabolites) 190 as potential bio-herbicides I.R Ovini, K. Pakeerathan, K. Pushpanji, G. Mikunthan An innovative liquid fertilizer to promote growth and yield responses of 197 tomato (Lycopersicon esculentum Mill.) R. Thamilini, N. Gnanavelrajah, S.J. Arasakesary, A. Amirthalojanan Attitude of young generation on cinnamon cultivation and processing: a 202 case study in Karandeniya DS division B.D.S. Madushani, R.T. Weliwatta, K.W. Beham, H.A.N. Thilakarathna Marker ABUOP0003: a modified molecular marker for gel-based 207 genotyping of submergence tolerance gene sub1a in rice N.H.L.D.L.D. Nanayakkara and D.V. Jayatilake Yield determining physiological and agronomic parameters of three 212 cowpea varieties grown in Anuradhapura, Sri Lanka I. Wijayaraja, D.A.U.D. Devasinghe, L.K. Weerasinghe, M.D.P. Kumarathunge, D.M.D. Dissanayake, U.S. Herath, T.A.B.D. Sanjeewa, W.C.P. Egodawatta, P.A. Weerasinghe, W.A.J.M. De Costa, N. Geekiyanage Focus Area: Health Gender differences of vitamin D levels and its association with selected 219 obesity markers, insulin resistance in young adults in Sri Lanka R.G.L. Rathnayake, U.P.K. Hettiarathchi, P.P.R. Perera Nephroprotective effect of selected extracts of Barleria prionitis Linn. 224 against adriamycin induced nephrotoxicity in wistar rats A.M.S.S. Amarasiri, A.P. Attanayake, K.A.P.W. Jayatilaka, L.K.B. Mudduwa L.D.A.M. Arawwawala Association between fluid and dietary non-adherence with morbidity and 228 mortality in haemodialysis patients attending to nephrology unit, national hospital, Kandy H.G.N. Erandika, N. Nanayakkara, M.D.M.L.D.K. Yatawara Association between selected parameters involved in glucose homeostasis 232 and severity of anticholinesterase insecticide poisoning T.K.R.R. Senarathne, U.Hettiaratchi, S. Siribaddana, H. Peiris, L. Athiththan Incidence of overweight and obesity vs body fat percentages among 236 undergraduate students of Rajarata University of Sri Lanka P.R.S.R.J. Bandara, S.P.A.S. Senadheera, S. Wickramge, P.H.P. Fernando Cut off for hypovitaminosis D based on parathyroid hormone levels among 240 a population of pregnant mothers in the Colombo district K. Anusha , U.P.K. Hettiaratchi , S. Prathapan G. Liyanage Evaluation of hepatotoxicity of “Sinna Sivappu Maathirai”: a siddha herbo 245 mineral drug, in patients with respiratory diseases who visit Siddha teaching hospital Kaithady, Jaffna T. Vijayakumar, S. Balakumar, T. Thileepan, N. Suganthan, S.N.
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