Science: Recent submissions

Now showing items 221-240 of 846

Insect vectors of human viral diseases: Can they transmit COVID-19?

Dangalle, C. D. (2021)

Many insects are naturally infected by a wide range of viruses and transmit viral diseases that cause significant morbidity and mortality to humans. Amongst insects, mosquitoes are the prominent vectors of viral diseases ...
Arboreal Tiger Beetles Recorded from Lowland Crop Cultivations in Sri Lanka

Abeywardhana, D.L.; Dangalle, C. D.; Mallawarachchi, Y.W. (2021)

Purpose : Thirty-one species of arboreal tiger beetles are known from Sri Lanka of which 25 species are endemic. However, their habitat types are poorly documented and the available records are far outdated. Therefore, ...
Cytogenotoxicity evaluation of a heavy metal mixture, detected in a polluted urban wetland: Micronucleus and comet induction in the Indian green frog (Euphlyctis hexadactylus) erythrocytes and the Allium cepa bioassay

Jayawardena, Uthpala A.; Wickramasinghe, Deepthi D.; Udagama, Preethi V. (2021)

Heavy metal contamination in wetland ecosystems is a serious environmental and health concern. This study evaluated the cytogenotoxicity of a previously evidenced heavy metal contamination (Cd, Cr, Cu, Pb and Zn ∼5 ppm ...
Morphology and Phylogeny Reveal Nine New Records of Polypores from Dry Zone of Sri Lanka

Ediriweera, Surani Saddha; Nanayakkara, Chandrika Malkanthi; Weerasena, O.V.D.S.J.; Karunarathna, Samantha Chandranath; Wijesundera, Ravindra Lakshman Chundananda; Piyatissa, Malimboda Arachchige Senuri Udara (2021)

Polyporoid fungi, which belong to Basidiomycota are of leathery and woody texture and have poroid hymenophores. Even though several earlier studies have been carried out in Sri Lanka, the fungal names of theses collections ...
Characterization of Conserved Sugarcane (Saccharum spp.) Germplasm for Parental Selection in Directional Breeding of Economically Important Traits

Kiriwaththuduwa, B.; Wijesuriya, A.; Silva, T. D.; Ranwala, S.M.W; Wijesuriya, W. (2021)

Enhancement of sugar production in Sri Lanka is very important since a large amount of foreign exchange is spent on sugar importation every year. Cultivation of improved varieties developed through proven crosses involving ...
Genome-wide Identification and Analysis of Late Embryogenesis Abundant (LEA) Genes in Musa acuminata

Piyatissa, Senuri; Bandupriya, Dharshani (2021)

Key Message Eighty four MaLEA genes were found coding for eighty five proteins, most of which are small and hydrophilic, and show ubiquitous distribution in the cell. MaLEA genes, having few introns, are distributed on all ...
Evolution and biogeography of Memecylon

Amarasinghe, Prabha; Joshi, Sneha; Page, Navendu; Wijedasa, Lahiru S.; Merello, Mary; Kathriarachchi, Hashendra; Stone, Robert Douglas; Judd, Walter; Kodandaramaiah, Ullasa; Cellinese, Nico (2021)

Premise The woody plant group Memecylon (Melastomataceae) is a large clade occupying diverse forest habitats in the Old World tropics and exhibiting high regional endemism. Its phylogenetic relationships have been ...
Comparison of methods of estimation for a goodness of fit test – an analytical and simulation study

Pinto, Vimukthini; Sooriyarachchi, M.R. (Taylor and Francis, 2021)

Multilevel modelling is a novel approach to analyse data which consist of a hierarchical or a nested structure. With advancements in multilevel modelling, there has been an advancement in the estimation techniques and ...
Analysis of Single Nucleotide polymorphisms at the Plasmodium vivax Apical Membrane Antigen 1 (PvAMA1) locus among Sri Lankan isolates.

Gunasekera A, Premaratne; Wickramarachchi, W T A; Ganguli, I; Perera, K L R L; Handunnetti, S M; Udagama-Randeniya, P V; Wirth, D F (54th Ann. Meeting of the American Societyof Tropical Medicine and Hygiene, Miami, FL, USA., 2005)

The assessment of genetic structure among parasite populations has significant relevance for both the control and epidemiology of malaria; in particular, examining diversity among antigenic loci rs crucial for effective ...
Antibody Responses of F{aturally Infected Individuals to Asexual trythrocytic Stage Vaccine Candidates of P. vivax in Sri Lanka

Wickramarachchil, W.T.A.; Perera, K.L.R.L.; Loogactre, S; Bandara, S; Thomas, A; Handunnetti, S.M.; Udagama-Randeniya, P.V. (Vivax malaria research: 2002 and beyond, February 3- 8, Bangkok, Thailand, pp27,, 2002)
p_BoF,il.FS_OF tcq AND tGM ANTTBODIES TO PV66/AMA-1 lN INDIVIDUAIS NATURATLY TNFECTED WITH PLASMODIUM VIVAX FROM SRI LANKA

Wickramarachchil, W.T.A.; Premarathnel, H.P,; Perera, K.L.R.L.; Bandara, S.; Thomas, A.; Handunnetti, S.M.; Udagama-Randeniyal, P.V. (6th FIMSA Advance “Molecular Mechanisms of infection and Immunity”, 2002)

An understanding of the natural immune response to vaccine candidates is important in vaccine development. Recombinant protein, PV66/AMA-1, representing native Apical Membrane Antigen-'l of Plasmodium vivax, was used in ...
Compensatory Base Changes Reveal Sexual Incompatibility among Members of the Anopheles subpictus Sensu Lato (Diptera: Culicidae) Species Complex in Sri Lanka

Jayatunga, D. P. W.; Harischandra, I. N.; Chandrasekharan, N. V.; de Silva, B. G. D. N. K. (MDPI, 2021)

The mosquito Anopheles (Cellia) subpictus sensu lato (s.l.) is a major secondary vector of malaria in Sri Lanka. The sibling species composition in this species complex in Sri Lanka remains debatable. Compensatory base ...
Establishment of regional diagnostic reference levels for digital mammography in Western Province of Sri Lanka

Niroshani, H.S.; Jeyasugiththan, Jeyasingam; Senanayake, G.; Negishi, Toru (2021)

The radiation dose to the breasts should be kept to a minimum as breast tissues are highly sensitive to radiation. In mammography, the mean glandular dose (MGD) is used to specify the patient dose. In this study, data on ...
Measuring prompt gamma-ray emissions from elements found in tissue during passive-beam proton therapy

Jeyasugiththan, Jeyasingam; Camero, Jaime Nieto; Symons, Julyan; Jones, Pete; Buffler, Andy; Geduld, Dieter; Peterson, Stephen W (2021)

Prompt gamma detection during proton radiotherapy for range verification purposes will need to operate in both active and passive treatment beam environments. This paper describes prompt gamma measurements using a high ...
Paediatric diagnostic reference levels in computed tomography: a systematic review

Satharasinghe, D.M.; Jeyasugiththan, Jeyasingam; Wanninayake, W.M.N.M.B.; Pallewatte, A.S. (2021)

This study aims to review the existing literature on diagnostic reference levels (DRLs) in paediatric computed tomography (CT) procedures and the methodologies for establishing them. A comprehensive literature search was ...
Biopolymer-Based Nanohydroxyapatite Composites for the Removal of Fluoride, Lead, Cadmium, and Arsenic from Water

Fernando, M. Shanika; Wimalasiri, A.K.D.V.K.; Dziemidowicz, Karolina; Williams, Gareth R.; Koswattage, K.R.; Dissanayake, D.P.; de Silva, K.M. Nalin; de Silva, Rohini M. (American Chemical Society, 2021)

In this study, hydroxyapatite (HAP) nanocomposites were prepared with chitosan (HAP-CTS), carboxymethyl cellulose (HAP-CMC), alginate (HAP-ALG), and gelatin (HAP-GEL) using a simple wet chemical in situ precipitation method. ...
Reduction-Induced Synthesis of Reduced Graphene Oxide-Wrapped Cu2O/Cu Nanoparticles for Photodegradation of Methylene Blu

Kalubowila, K. D. R. N.; Gunewardene, M.Siyath; Dissanayake, Dhammike; Jayathilaka, Charith; Jayasundara, J.M.Dilushan; Jayasingha, Lakmini Kaushalya; Gao, Yun; Jayanetti, J. K. D. S. (ACS Publications, 2021)

A photocatalytic composite in powder form having nanosized Cu2O/Cu granules wrapped in multilayered reduced graphene oxide (rGO) sheets was synthesized. The fabrication process was initiated by potentiostatic electrodeposition ...
Effect of natural curcuminoids-intercalated layered double hydroxide nanohybrid against Staphylococcus aureus, Pseudomonas aeruginosa, and Enterococcus faecalis: A bactericidal, antibiofilm, and mechanistic study

Gayani, Buddhika; Dilhari, Ayomi; Wijesinghe, Gayan Kanchana; Kumarage, Sajeewani; Abayaweera, Gayani; Samarakoon, Sameera R.; Perera, Inoka C.; Kottegoda, Nilwala; Weerasekera, Manjula M. (2018)

The study aimed to determine the antibacterial/antibiofilm effect and mechanism of interaction of curcuminoids-intercalated Mg/Al layered double hydroxide (curcuminoids-LDH) against three different bacteria. Antimicrobial ...
Synthesis, photodegradable and antibacterial properties of Polystyrene-cinnamaldehyde copolymer film

Nayanathara, Umeka; Kottegoda, Nilwala; Perera, Inoka C.; Mudiyanselage, Thilini Kuruwita (2018)

Copolymerization of styrene (St) and different ratios of Cinnamaldehyde (Cin) from cinnamon oil and synthetic cinnamaldehyde were carried out by free radical polymerization, and were characterized by Fourier Transform ...
Synthesis, characterization and biological evaluation of dipicolylamine sulfonamide derivatized platinum complexes as potential anticancer agents

Thushara, Nadini; Darshani, Taniya; Samarakoon, Sameera R.; Perera, Inoka C.; Fronczek, Frank R.; Sameera, Sameera; Perera, Theshini (2021)

Three new Pt complexes, [PtCl2(N(SO2(2-nap))dpa)], [PtCl2(N(SO2(1-nap))dpa)] and [PtCl2(N(SO2pip)dpa)], containing a rare 8-membered ring were synthesized in good yield and high purity by utilizing the ligands N(SO2(2-nap))dpa, ...

Now showing items 221-240 of 846

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