Faculty of Science: Recent submissions

Now showing items 261-280 of 655

Trends in extreme rainfall events in Sri Lanka,1961–2010

Thevakaran, A.; Suppiah, R.; Sonnadara, U. (Journal of the National Science Foundation of Sri Lanka, 2019)

Abstract: Many parts of Sri Lanka are vulnerable to extreme UDLQIDOO HYHQWV OHDGLQJ WR ÀRRGV DQG GURXJKWV 7KLV VWXG\ was focused on a trend analysis of climate extremes derived from daily rainfall records. The ...
Isolation of a cellulase producing Bacillus cereus from cow dung and determination of the kinetic properties of the crude enzyme.

Mary Brintha Croos, A.; Sarathadevi, R.; Kapilan, R. (Journal of the National Science Foundation of Sri Lanka, 2019)

The objective of the study was to isolate a thermostable alkaline cellulase producing bacterial strain from diverse natural sources such as goat excreta, cow dung, tropical soil, and organic matter. Opened hot cellulose ...
Susceptibility to common insecticides and detoxifying enzyme activities in Anopheles sundaicus (sensu lato) after cessation of indoor residual spraying of insecticides in the Jaffna Peninsula and its surroundings in northern Sri Lanka

Kokila, S.; Weerarathne, T.C.; Thileepan, A.; Parakrama Karunaratne, S.H.P.; Ramasamy, R.; Surendran, S.N. (Parasites & Vectors, 2019)

Abstract Background: Sri Lanka has been malaria-free since 2013 but re-introduction of malaria transmission by infected overseas travelers is possible due to a prevalence of potent malaria vectors. Knowledge of the insecticide ...
Polymer/Fullerene Blend Solar Cells with Cadmium Sulfide Thin Film as an Alternative Hole-Blocking Layer

Thanihaichelvan, M.; Loheeswaran, S.; Balashangar, K.; Velauthapillai, D.; Ravirajan, P. (Polymers, 2019)

: In this work, chemical bath-deposited cadmium sulfide (CdS) thin films were employed as an alternative hole-blocking layer for inverted poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) bulk ...
Highly Sensitive and Selective Ethanol Sensor Based on ZnO Nanorod on SnO2 Thin Film Fabricated by Spray Pyrolysis

Tharsika, T.; Thanihaichelvan, M.; Haseeb, A.S.M.A; Akbar, S.A. (ORIGINAL RESEARCH, 2019)

This work reports the fabrication of mixed structure of ZnO nanorod on SnO2 thin film via spray pyrolysis followed by thermal annealing and their gas sensing properties. ZnO/SnO2 nanostructures are successfully prepared ...
Powder Pressed Cuprous Iodide (CuI) as A Hole Transporting Material for Perovskite Solar Cells

Uthayaraj, S.; Karunarathne, D. G. B. C; Kumara, G. R. A.; Murugathas, T.; Shivatharsiny, R.; Rajapakse, R. M. G.; Ravirajan, P.; Velauthapillai, D. (Materials, 2019)

Abstract: This study focuses on employing cuprous iodide (CuI) as a hole-transporting material (HTM) in fabricating highly efficient perovskite solar cells (PSCs). The PSCs were made in air with either CuI or 2,20 ,7,70 ...
Development of the major arboviral vector Aedes aegypti in urban drain-water and associated pyrethroid insecticide resistance is a potential global health challenge

Surendran, S.N.; Jayadas, T.T.P.; Kokila, S.; Sharanga, S.; Karvannan, K.; Weerarathne, T.C.; Parakrama Karunaratne, S.H.P.; Ramasamy, R. (Parasites & Vectors, 2019)

Background: Aedes aegypti were found developing in the water in open public drains (drain-water, DW) in Jafna city in northern Sri Lanka, a location where the arboviral diseases dengue and chikungunya are endemic. Methods: ...
Defect, Diffusion and Dopant Properties of NaNiO2: Atomistic Simulation Study

Kaushalya, R.; Iyngaran, P.; Kuganathan, N.; Chroneos, A. (Energies, 2019)

Abstract: Sodium nickelate, NaNiO2, is a candidate cathode material for sodium ion batteries due to its high volumetric and gravimetric energy density. The use of atomistic simulation techniques allows the examination of ...
Theoretical Modeling of Defects, Dopants, and Diffusion in the Mineral Ilmenite

Kuganathan, N.; Srikaran, R.; Fossati, P.C.M.; Chroneos, A. (2019)

Abstract: The iron titanium oxide ilmenite (FeTiO3) is a technologically and economically important mineral in the industrial preparation of titanium-based pigments and spintronic devices. In this study, atomistic simulation ...
Stability of Coinage Metals Interacting with C60

Kuganathan, N.; Srikaran, R.; Chroneos, A. (Nanomaterials, 2019)

: Buckminsterfullerene (C60) has been advocated as a perfect candidate material for the encapsulation and adsorption of a variety of metals and the resultant metallofullerenes have been considered for the use in different ...
A Computational Study of Defects, Li-Ion Migration and Dopants in Li2ZnSiO4 Polymorphs

Perera, D.; Ganeshalingam, S.; Kuganathan, N.; Chroneos, A. (Crystals, 2019)

Abstract: Lithium zinc silicate, Li2ZnSiO4, is a promising ceramic solid electrolyte material for Li-ion batteries. In this study, atomistic simulation techniques were employed to examine intrinsic defect processes; long ...
The clinical profle, hematological parameters and liver transaminases of dengue NS1 Ag positive patients admitted to Jafna Teaching Hospital, Sri Lanka

Jayadas, T. T. P.; Kumanan, T.; Arasaratnam, V.; Gajapathy, K.; Surendran, S.N. (BMC Research notes, 2019)

Objective: Objective of the study is to evaluate the on-admission day symptoms and signs, clinical, hematological parameters and liver transaminases of the dengue NS1 positive patients who got admitted on diferent clinical ...
CoS2/TiO2 Nanocomposites for Hydrogen Production under UV Irradiation

Sivagowri, S.; Velauthapillai, D.; Ravirajan, P.; Christy, A.A.; Shivatharsiny, Y. (Materials, 2019)

Transition metal chalcogenides have intensively focused on photocatalytic hydrogen production for a decade due to their stronger edge and the quantum confinement effect. This work mainly focuses on synthesis and hydrogen ...
The status of the coral reefs of the jaffna peninsula (northern sri lanka), with 36 coral species new to sri lanka confirmed by dna bar-coding

Arulananthan, A.; Herath, V.; Kuganathan, S.; Upasanta, A.; Harishchandra, A. (University of Jaffna, 2021)

Sri Lanka, an island nation located off the southeast coast of the Indian sub-continent, has an unappreciated diversity of corals and other reef organisms. In particular, knowledge of the status of coral reefs in its ...
Length-Weight Relationships of Four Different Sea Cucumber Species in North-East Coastal Region of Sri Lanka

Veronika, K.; Edrisinghe, U.; Sivashanthini, K.; Athauda, A.R.S.B. (University of Jaffna, 2018)

A detailed investigation on length-weight relationship of four sea cucumber species, Holothuria spinifera, Bohadschia marmorata, Stichopus naso, and Holothuria atra found in the commercial catches of North-East coastal ...
The status of diversity and species composition of crabs in navanthurai coastal area in jaffna peninsula of sri lanka

Tharmine, N.; Edrisinghe, U.; Sivashanthini, K. (University of Jaffna, 2014)

Crabs are economically important and a protein rich commodity in the coastal as well as offshore fisheries in Sri Lanka. Crabs are one of the potential aquaculture candidates and also form important commercial and ...
Length-Weight Relationships and Growth Patterns of Local Fishes of the Medium Perennial Vavuniya Reservoir, Sri Lanka

Patrick, A.E.S.; Kuganathan, S.; Edirisinghe, U. (University of Jaffna, 2021)

Linear regression analysis of length-weight relationships (LWRs) were studied to reveal the growth patterns of 380 specimens belonging to 10 species, 9 genera and 5 families of local fish in Vavuniya reservoir, Sri Lanka ...
Status of the fishery of jaffna lagoon, sri lanka

Ragavan, N.; Dissanayake, D.C.T.; Kuganathan, S. (University of Jaffna, 2021)

Jaffna lagoon (9° 50' N and 79° 50' E to 9° 20' N and 80° 30' E) is the largest lagoon in Sri Lanka and it provides many services including fishing opportunities to the people in northern Sri Lanka. However, the status ...
Species composition and abundance of fishes with seasonal fluctuations of rainfall and water level in vavuniya reservoir, sri lanka

Patrick, A.E.S.; Kuganathan, S.; Edirisinghe, U. (University of Jaffna, 2017)

Dramatic loss of freshwater fish bio-diversity and survival of un requirement of systemic surveys. Extreme hydro in dry zone aquatic resources such as Vavuniya reservoir, threatening fish species richness and abundance. ...
Reproductive characteristics of doublespotted queenfish, scomberoides lysan (actinopterygii: perciformes: carangidae), from sri lankan waters: implications for fisheries management

Thulasitha, W.S.; Sivashanthini, K. (University of Jaffna, 2013)

Now showing items 261-280 of 655

Search DSpace

Advanced Search

Browse

All of DSpace
This Community

Recently added

Faculty of Science: Recent submissions

Search DSpace

Browse

All of DSpace

This Community

My Account