Chemistry: Recent submissions

Now showing items 121-140 of 445

Determination of selenium content in selected edible green leaves

De Silva, D.S.M.; Dayarathna, A.G.S. (Ceylon Journal of Science, 2019)

The selenium (Se) contents in seven conventional Edible Green Leaves (EGL) that consumed by Sri Lankans were determined using Hydride Generation Atomic Absorption Spectrometric method (HGAAS). The EGLs that were grown in ...
Comparative Study of Antioxidant Potential of Selected Dietary Vitamins; Computational Insights

Pandithavidana, D.R.; Jayawardana, S.B. (Molecules, 2019)

Density functional theory (DFT) was used to explore the antioxidant properties of some naturally occurring dietary vitamins, and the reaction enthalpies related to various mechanisms of primary antioxidant action, i.e., ...
Computational design and investigation of antioxidant activity of phenolic compounds and their derivatives

Surangika, K.H.K.; Pandithavidana, D.R. (Proceedings of the 73rd Annual Sessions of Sri Lanka Association for the Advancement of Science, 2017)

Among various types of antioxidants, phenolic antioxidants form an important class of compounds, which serves to inhibit the oxidation of materials of both commercial and biological importance. Density functional theory ...
Phenolic extracts of the leaves of Psidium guineense Sw. improve the shelf life of sunflower oil and baked cake and antioxidant status of Wistar rats

Senanayake, C.M.; Hapugaswatta, H.; Jayathilaka, N.; Seneviratne, K.N. (J Food Biochem, 2018)

The potential of the ethanolic extract of Psidium guineense Sw. leaves (PGLE) to protect food from oxidation was evaluated using sunflower oil and baked cake as food models. The nutritional quality of PGLE was evaluated ...
Fabrication of CdS/CdTe Thin Film Solar Cells via the Technique of Electrodeposition

Atapattu, H.Y.R.; De Silva, D.S.M.; Ojo, A.A.; Dharmadasa, I.M. (Development of Solar Power Generation and Energy Harvesting, 2018)

This study focused on fabrication of CdS/CdTe solar cells using the technique of electrodeposition as it is simple, low cost and scalable method. Initially, CdS and CdTe materials were individually deposited on fluorine ...
An investigation into the effect of rate of stirring of bath electrolyte on the properties of electrodeposited CdTe thin film semiconductors

Atapattu, H.Y.R.; De Silva, D.S.M.; Pathirane, K.A.S.; Dharmadasa, I.M. (2018)

Electrodeposition (ED) has been recognized as a low cost and scalable technique available for fabrication of CdS/CdTe solar cells. Photovoltaic activity of these electrodeposited semiconductor materials drastically depends ...
Necessity and relevance of precipitate free clear electrolytes for electrodeposition of CdS semiconductor materials with enhanced photovoltaic properties

Atapattu, H.Y.R.; De Silva, D.S.M.; Pathirane, K.A.S.; Olusola, O.I.; Dharmadasa, I.M. (. Journal of Materials Science: Materials in Electronics, 2018)

Cadmium sulfide (CdS) is a well-known window material used for fabrication of second generation thin film solar cells including CdS/CdTe and CdS/CuInGaSe2. Among the CdS fabrication techniques, electrodeposition is a simple, ...
Post deposition surface treatments to enhance the quality of polycrystalline CdTe thin films for photovoltaic applications

Atapattu, H.Y.R.; De Silva, D.S.M.; Pathirane, K.A.S. (Nit teria1s Chemi stry and Physics 213 (201S) 4065113, 2018)

Cadmium telluride (CdTe) is one of the topmost thin film polycrystalline materials used in the photo¬voltaics (PV) industry today and post deposition surface treatment has been a major step used in the production process ...
Selenium content in meals consumed for lunch by Sri Lankans and the effect of cooking on selenium content

Kiridena, K.M.S.D.; De Silva, D.S.M.; Wimalasena, S. (Ceylon Journal of Science, 2018)

The selenium (Se) content in meals consumed by Sri Lankans for lunch, composed of fixed and random menus, was determined using Hydride Generation Atomic Absorption Spectrometer. The samples were obtained from five districts ...
THE EFFECT OF CONCENTRATION AND PH OF CdC12 SOLUTION USED IN CdC12 TREATMENT ON THE PROPERTIES OF CdS THIN FILMS

Atapattu, I I.Y.R.; De Silva, D.S.M.; Pathiratne, K.A.S.; Dharmadasa, I.M. (Solar Asia 2018 Int. Conf. National Institute of Fundamental Studies, Kandy, Sri Lanka., 2018)

Among the post deposition treatments available for development of CdS/CdTe solar cells, CdCl2 treatment has been identified as one of the key processing steps that can be effectively used for improving power conversion ...
EFFECT OF THE TYPE OF CONDUCTING GLASS SUBSTRATE ON ELECTRODEPOSITED CdS AND CdTe THIN FILMS

De Alwis, A.C.S.; Atapattu, H.Y.R.; De Silva, D.S.M. (Solar Asia 2018 Int. Conf. National Institute of Fundamental Studies, Kandy, Sri Lanka, 2018)

Thin film CdS/CdTe solar cells produced by the technique of electrodeposition (ED) on conducting glass substrates have become one of the leading applications of photovoltaics due to its high energy conversion efficiency ...
Influence of the type of conducting glass substrate on the properties of electrodeposited CdS and CdTe thin films

De Alwisl, A.C.S.; Atapattu, H.Y.R.; De Silva, D.S.M. (Journal of Materials Science: Materials in Electronics (2018) 29:12419-12428 https://doi.org/10.1007/s10854-018-9358-8, 2018)

Owing to the greater efficiency in energy conversion by absorbing energy in a wider range of the solar spectrum, thin film CdSICdTe solar cells have been popularized as a prominent application of photovoltaics and the ...
Electrodeposition and characterization of as-deposited and annealed CdTe thin films.

Kumarasinghe, K. D. M. S. P. K.; De Silva, D. S. M.; Pathiratne, K. A. S.; Salim, H. I.; Abdul-Manaf, N. A.; Dharmadasa, I. M. (Ceylon Journal of Science, 45(2), 53–59. DOI: http://doi.org/10.4038/cjs.v45i2.7388, 2016)

Thin films of CdTe semiconductor materials were grown on fluorine doped tin oxide (FTO) conducting glass substrates using the technique of electrodeposition. CdSO4 at high concentrations and CdCl2, TeO2 at low concentrations ...
Selenium content in meals consumed for lunch by Sri Lankans and the effect of cooking on selenium content.

Kiridena, K. M. S. D.; De Silva, D. S. M.; Wimalasena, S. (Ceylon Journal of Science, 46(4), 21–25. DOI: http://doi.org/10.4038/cjs.v46i4.7465, 2017)

The selenium (Se) content in meals consumed by Sri Lankans for lunch, composed of fixed and random menus, was determined using Hydride Generation Atomic Absorption Spectrometer. The samples were obtained from five districts ...
Gestational diabetes mellitus and risk of type 2 diabetes 10 years after the index pregnancy in Sri Lankan women—A community based retrospective cohort study

Herath, H.; Herath, R.; Wickremasinghe, R. (PLOS ONE, 2017, DOI: 10.1371/journal.pone.0179647 /http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0179647&type=printable, 2017)

Background Women with a history of gestational diabetes mellitus (GDM) have an increased risk of type 2 diabetes mellitus (T2DM) later in life compared to women with no GDM. This study was aimed to determine the risk of ...
Host gene expression analysis in Sri Lankan melioidosis patients.

Krishnananthasivam, S.; Jayathilaka, N.; Sathkumara, H.D.; Corea, E.; Natesan, M.; De Silva, A.D. (PLoS Negl Trop Dis 11(6), 2017)

Melioidosis is a life threatening infectious disease caused by the gram-negative bacillus Burkholderia pseudomallei predominantly found in southeast Asia and northern Australia. Studying the host transcription profiles in ...
Effect of three edible oils on the intestinal absorption of caffeic acid: An in vivo and in vitro study.

Prasadani, W.C.; Senanayake., C.M; Jayathilaka., N; Ekanayake., S; Seneviratne, K.N. (PLoS ONE 12(6), 2017)

Polyphenolic antioxidants are mainly absorbed through passive paracellular permeation regulated by tight junctions. Some fatty acids are known to modulate tight junctions. Fatty acids resulting from the digestion of ...
Synthesis, Optimization, and Performance Demonstration of Electrospun Carbon Nanofiber–Carbon Nanotube Composite Sorbents for Point-of-Use Water Treatment

Peter, K.T.; Vargo, J.D.; Rupasinghe, T.P.; De Jesus, A.; Tivanski, A.V.; Sander, E.A.; Myung, N.V.; Cwiertny, D.M. (American Chemical Society., 2016)

We developed an electrospun carbon nanofiber–carbon nanotube (CNF–CNT) composite with optimal sorption capacity and material strength for point-of-use (POU) water treatment. Synthesis variables including integration of ...
Dissolution and aggregation of zinc oxide nanoparticles at circumneutral pH; a study of size effects in the presence and absence of citric acid

Rupasinghe, R.A. (The University of Iowa, ProQuest Dissertations., 2011)

Understanding the size dependent dissolution of engineered nanoparticles is one important aspect in addressing the potential environmental and health impacts of these materials as well as their long-term stability. In ...
Nanocrystals of a Metal–Organic Complex Exhibit Remarkably High Conductivity that Increases in a Single-Crystal-to-Single-Crystal Transformation

Hutchins, K.M.; Rupasinghe, T.P.; Ditzler, L.R.; Swenson, D.C.; Sander, J.R.G.; Baltrusaitis, J.; Tivanski, A.V.; MacGillivray, L.R. (American Chemical Society., 2014)

Ag(I) is used to form a π-stacked metal–organic solid that exhibits remarkably high electrical conductivity. The solid undergoes a single-crystal-to-single-crystal [2+2] photodimerization to generate a 1D coordination ...

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