International Research Symposium on Pure and Applied Sciences (IRSPAS): Recent submissions

  • Time series modeling of red onion production in Jaffna, Sri Lanka 
    Mirojan, U.; Varathan, N.; Arumairajan, S. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Onion is one of the most important commercial vegetable crops grown in Sri Lanka. Observing fluctuation of onion production is essential in the market economy. The level of the production and the fluctuation not only has ...
  • Statistical modelling of monthly electricity sales in Colombo: ARIMA approach 
    Herath, H. M. R. D. S.; Varathan, N. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Electricity is the most essential form of energy, used all over the globe. It has influenced the economy, public health, technological growth and all other spheres of human activities. The electricity sales are growing day ...
  • Design and performance investigation of a canonical circuit model for power converters 
    Sandanayake, P. S. D.; Jayatissa, N. W. K. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    A “Switched Mode Power Supply (SMPS)” is an electronic device that involves switching regulation for efficient power conversion. They take power from an AC or a DC input, and produce a processed current/voltage output of ...
  • An enhanced amplitude estimation system for sinusoidal signals based on phase sensitive detection 
    Ajward, A. M. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Highly accurate estimations of the amplitudes of sinusoidal signals that are associated with huge noise levels have many practical applications especially in domains such as research, medicine, and industry. Under considerably ...
  • Bound on Weierstrass vertices of graphs 
    De Vas Gunasekara, A. R. C.; Brennan, J. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Chip-firing games and divisor theory on finite, connected, undirected and unweighted graphs have been studied as analogs of divisor theory on Riemann Surfaces and algebraic curves. As part of this theory, a version of the ...
  • A theoretical study of variable stars 
    Wijethunga, A. T. M.; Perera, P. A. A. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    A variable star is, quite simply, a star that changes its brightness with a certain regularity. The Energy required for pulsation stars’ continuous operation is provided by a complex mechanism of transforming the thermal ...
  • Effect of solid-state fermentation by Rhizopus oryzae on rice bran bioactives, their bioactivity, bioaccessibility and bioavailability 
    Janarny, G.; Gunathilake, K. D. P. P. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Rice bran is a rich source of bioactive compounds. It is an underutilized agro-industrial residue for human consumption. Solid-state fermentation has been employed as a processing technique to increase the content of ...
  • Seed dormancy, germination and soil seed bank composition of 12 common rice weeds of Sri Lanka 
    Alahakoon, A. A. C. B.; Abeysiriwardena, D. S. D. Z.; Damunupola, J. W.; Gam-Arachchige, N. S. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Weeds are a major problem that affects rice production causing heavy economic losses. This study was conducted to investigate seed dormancy and germination of common paddy weeds in Sri Lanka and their soil seed bank status. ...
  • An effective DNA extraction protocol for Santalum album (Sandalwood) of Sri Lanka 
    Perera, U. I. D.; Welikala, N. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Isolation of genomic DNA is the primary step in studying molecular aspects in any organism. But, this is challenging in medicinal plants due to the presence of higher amounts of polyphenols and secondary metabolites. In ...
  • Important physiochemical properties of selected underutilized yams and development of cup-cakes using “Raja ala” (Dioscorea alata) flour 
    Gunasekara, G. D. M.; Wickramasinghe, I.; Wijesekara, I. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Sri Lanka has many underutilized yams with high nutritional potential. Most of these underutilized species have lost their significance among the present generation due to many reasons such as urbanization and changing ...
  • Morphometry and pollen germinability of selected commercial Dendrobium cultivars 
    Kahagalla, T. H.; Hearth, H. M.; Attanayake, R. N.; Senanayake, S. P. (2018)
    Dendrobium is one of the highly demanding ornamental plant genus in Sri Lanka. However, taxonomic identification of Dendrobiums are not straightforward and it is often complicated with the introduction of large number of ...
  • Anatomy and chromium tolerance of green leafy vegetable, Alternanthera sessilis and its sympatric weed, Alternanthera philoxeroides 
    Siriwardhana, K. H. W.; Ratnayake, R. M. C. S. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Heavy metals can be readily taken up by crop roots and can be accumulated at high levels in edible parts. Elevated levels of heavy metal in edible parts of vegetables can affect human health. Some food plants in Sri Lanka ...
  • Effect of aqueous extracts of Annona glabra plant and extracellular metabolites of two Trichoderma species on the survival of larval Culex quinquefasciatus and eggs of Aedes aegypti 
    Aberathna, A. A. A. U.; Ranasinghe, H. A. K.; Rajapaksha, R. D. T.; Amarasinghe, L. D. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Phytochemicals constitute a rich source of bioactive chemicals and some microbial products carry selective toxicity to many insect species, hence those are considered as alternatives to chemical insecticides. This study ...
  • Efficient ethanologenic yeast isolates for potential application in bioethanol production 
    Jayasekara, S. K.; Abayasekara, C. L.; Ratnayake, R. R. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Yeast plays an essential role in bioethanol production as sugar fermenters. As all yeasts are not efficient ethanol producers, evaluation of yeast for ethanol production ability is essential if novel yeast varieties are ...
  • Optimization of monoplex and multiplex PCR assays to detect meat species and adulteration of meat products in the Sri Lankan market 
    Kothalawala, S. D.; Karaliyadda, S.; Fernando, A. L.; Karaliyadda, M.; De Silva, V. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Meat identification testing, detecting intentional adulteration of meat and detecting meat contamination due to poor processing practices are essential to ensure good quality of meat products. Incidence of meat adulteration, ...
  • Relationship between angina and physical activity to the Quality of Life (QOL) of patients following Coronary Artery Bypass Graft (CABG) 
    Aberathna, A. M. I. S.; Danasekara, D. R. S. R.; Wickramarachchi, W. A. T. R.; Jayathissa, S. N. E.,; Bandara, S. M. K. B.; Karunaratna, N. G. K. D.; De Silva, H. M. Y. R.; Senevirathna, N.; Wijesinghe, R. A. N. K. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Coronary artery disease has been identified as the most common cardio vascular disease. Prevalence of coronary artery disease is on the rise in Sri Lanka resulting in high hospital admission, morbidity and mortality. ...
  • Variation of water solubility index and water absorption index of Ipome batatas (sweet potatoes) cultivars 
    Waidyarathna, G. R. N. N.; Ekanayake, S.; Chandrasekara, G. A. P. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Sweet potato (Ipomoea batatas L.) is considered as one of the most versatile energy and vitamin provider. Functional properties of food such as water solubility index (WSI) and water absorption index (WAI) are used in food ...
  • Determination of variation components of harvested rice seeds grown in selected areas of four grama niladari divisions in North Central Province 
    Weerakoon, T.; Jayawardane, B. M. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    During the last two decades, alarmingly high incidences of kidney failure and some associated deaths have become very significant in certain parts of Madawachchiya district and Uva Province and North Central Province. Since ...
  • Determination of anti-diabetic properties in Cinnamomum zeylanicum 
    De Silva, W. D. T.; Jayawardane, B. M. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Diabetes is one of the major complications that millions of individuals in the world faces today. If two key enzymes, the α amylase and α glucosidase are inhibited, it can lower the possibility to develop diabetes. Synthetic ...
  • Plankton diversity in Bomburuella reservoir, Nuwara-Eliya: A preliminary survey 
    Hettige, N. D.; Weerasekara, K. A. W. S.; Chandrasiri, E. G. D. N.; Jayawardene, J. M. C. K. (Research Symposium on Pure and Applied Sciences, 2018 Faculty of Science, University of Kelaniya, Sri Lanka, 2018)
    Bomburuella is a perennial reservoir located in the Nuwara-Eliya district. This reservoir is mainly used for fisheries, agriculture and drinking purposes. Although, a number of studies have been carried out to assess the ...

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