Browsing Department of Chemistry by Title

Now showing items 1-20 of 72

Absolute pKa determination for N-phenylbenzohydroxamic

Senthilnithy, R.; Gunawardhana, H.D.; Costa, M.D.P. De; Dissanayake, D.P. (Journal of Molecular Structure, 2006)

Ab initio calculations on isomers of N-phenylbenzohydroxamic acid derivatives and their deprotonation process have been performed. Gas phase geometries were optimised using complete basis set method, CBS-QB3 as implemented ...
Activity directed fractionation of Pleurotus Ostreatus in search of analgesics.

Vasudewa, N.S.; Abeytunga, D.T.U.; Ratnasooriya, W.D. (Pharmaceutical Biology, 2008)

Pleurotus ostreatus. (Jacquin: Fries) P. Kummer (Tricholomataceae) was subjected to an antinociceptive activity-guided fractionation procedure in order to identify the fraction having highest activity. Three extracts, ...
activity of Pleurotus Ostreatus, an edible mushroom, in rats

Vasudewa, N.S.; Abeytunga, D.T.U.; Ratnasooriya, W.D. (2007)

The antinociceptive potential of Pleurotus ostreatus. (Jacquin: Fries) P. Kummer (Tricholomataceae) was investigated in rats (doses used: 125, 500, and 1000 mg/kg). Male rats and female rats in proestrous, estrous, and ...
ANTI FUN GAL ACTIVITY OF SURFACE MODIFIED Mn2+ Z110

Jayaruk, T.C.; Wijesundara, R.L.C. (2012)

This research has focused on determining the antiﬂingal of activity of Mn2+ doped ZnO nanoparticles. The Mi2+-ZnO nanoparticles coated with PEG was selected for theapplication as PEG is a biocompatible materia. which ...
Antibacterial activities of volvariella volvacea

Perera, W.A.S.W.; Abeytunga, D.T.U.; Wijesundara, R.L.C. (2001)

: Extracts of twenty- one basidiomycctc fungi were tested against the bacteria, Staphylococcus aureus, Streptococcus. Pseuciornor~c~s mruginosa, Escherichia coli, and Klebsiella. Among them Volvariella oolvacea showed ...
Antinociceptive activity of Pleurotus cystidiosus, an edible mushroom in rats

Kudahewa, D.D.; Abeytunga, D.T.U.; Ratnasooriya, W.D. (. Pharmacognosy Magazine, 2011)

The antinociceptive potential of Pleurotus cystidiosus, an edible mushroom (family: Tricholomataceae) was investigated in male rats (doses used: 125, 500, and 1000 mg/kg) and female rats in the di-oestrous stage using ...
Antioxidant and cytotoxic properties of three traditional decoctions used for the treatment of cancer in Sri Lanka.

Perera, M.G.A.N.; Soysa, S.S.S.B.D.P.; Abeytunga, D.T.U.; Ramesh, R. (Pharmacognosy Magazine, 2008)

Many plant-based treatments are being recommended for the cancer patients by traditional medical practitioners of Sri Lanka. Three such decoctions D1 (Terminalia bellerica, Terminalia chebula, Phyllanthus emblica ...
Application of thermally derived merino wool carbon quantum dots for the detection Hg2+ in aqueous medium

Tissera, N.D.; Wijesena, R.N.; de Silva, Rohini M.; de Silva, K.M. Nalin (University of Colombo, 2020)

A facile, simple and low-cost approach for synthesizing highly fluorescent carbon quantum dots (CQDs) is reported. Wool consists of amino acids linked together by peptide linkages is abundant in C, N, H, O and S. Due to ...
Application of thermally derived merino wool carbon quantum dots for the detection Hg2+ in aqueous medium

Tissera, N.D.; Wijesena, R.N.; de Silva, Rohini M.; de Silva, K.M. Nalin (University of Colombo, 2020)

A facile, simple and low-cost approach for synthesizing highly fluorescent carbon quantum dots (CQDs) is reported. Wool consists of amino acids linked together by peptide linkages is abundant in C, N, H, O and S. Due to ...
Assessment of Developmental and Reproductive Fitness of Dengue-Resistant Transgenic Aedes aegypti and Improvement of Fitness Using Antibiotics

Ramyasoma, H.P.B.K.D.; Gunawardene, Y.I.N.S.; Hapugoda, Menaka; Dassanayake, R.S. (BioMed Research International, 2021)

Background. Genetic modification offers opportunities to introduce artificially created molecular defence mechanisms to vector mosquitoes to counter diseases causing pathogens such as the dengue virus, malaria parasite, ...
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. ...
Carfilzomib: A Promising Proteasome Inhibitor for the Treatment of Relapsed and Refractory Multiple Myeloma

Jayaweera, Shansa Pranami E.; Kanakanamge, Sacheela Prasadi Wanigasinghe; Rajalingam, Dharshika; Silva, Gayathri N. (Frontiers in Oncology, 2021)

The proteasome is crucial for the degradation of intracellular proteins and plays an important role in mediating a number of cell survival and progression events by controlling the levels of key regulatory proteins such ...
Cellulose Supported Magnetic Nanohybrids: Synthesis, Physicomagnetic Properties and Biomedical Applications-A Review

Mohamed Abdul Cader Mohamed Haniffa; Khadija Munawar; Ching Yern Chee; Sumit Pramanik; Ahmed Halilu; Hazlee Azil Illias; Muhammad Rizwan; Senthilnithy, Rajendram; Mahanama, K.R.R; Tripathy, Ashis; Mohd Fahmi Azman (Elsevier, 2021)

Cellulose and its forms are widely used in biomedical applications due to their biocompatibility, biodegradability and lack of cytotoxicity. It provides ample opportunities for the functionalization of supported magnetic ...
Characterization of a Bacillus megaterium strain with metal bioremediation potential and in silico discovery of novel cadmium binding motifs in the regulator, CadC

Kumari, W.M.N.H.; Thiruchittampalam, Shalini; Weerasinghe, Samantha; Chandrasekharan, N.V; Wijayarathna, C.D (Springer, 2021)

Bioremediation of toxic metal ions using bacterial strains is a promising tool. Metal binding motifs in microbial proteins are involved in the regulation and transport of such toxic metals for metal detoxification. A ...
Combined Zr and Y phosphate coatings reinforced with chemically anchored B2O3 for the oxidation inhibition of carbon fiber

Ratnayake, S.P.; Purasinhala, K.; Sandaruwan, C.; De Silva, Y. Madhavi; Mantilaka, M.M.M.G.P.G.; Priyadarshana, G.; Amaratunga, G.A.J.; de Silva, K.M. Nalin (Elsevier, 2021)

Abstract The use of carbon fiber-based composites in high-temperature environments has been hindered due to the inferior oxidation resistance of standard carbon fiber. Protective coatings comprised of refractory ceramics ...
Comparative analysis of Kajjali (1:1) in Ayurveda Rasashastra with synthesized β-HgS

Gunaratna, T.A.N.R.; de Silva, Rohini M.; Prajapati, P.K.; de Silva, K.M. Nalin (University of Colombo, 2020)

The black colour compound prepared manually by grinding purified mercury and purified sulphur is known as kajjali in Ayurveda rasashastra. This insoluble inorganic compound is known as β-HgS in chemistry. Although kajjali ...
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 ...
Conceptualization of chemical kinetics using a visually enhanced teaching technique; a developed MS Excel worksheet/system

Fernando, L.S.L.K.; Mahanama, K.R.R. (2021)

Abstract: Chemical kinetics or reaction kinetics is renowned as a division of physical chemistry which includes with understanding the ratesof chemical reactions. As physical chemistry lessons play ...
Detailed studies on complexation behaviour and mechanism of fluorescence quenching of naphthalene linked hydroxamic acid with transition metal ions by UV-visible and fluorescence spectra

Costa, M.D.P. De; Jayasinghe, W.A.P.A. (Journal of Photochemistry and Photobiology A: Chemistry, 2004)

The stoichiometry of the complex formation and mechanism of fluorescence quenching of compounds 1 and 2 with Fe(III), Cu(II) and Zn(II) were carried out in great detail by spectrometric and fluoromertric methods. Complexes ...
Development and validation of a portable paper-based low-cost electrochemical sensor for the detection of monosodium L-glutamate in food

Joseph, Ornella A; Dineesha, Nipuni; Kaumal, M.N. (Faculty of Technology, South Eastern University of Sri Lanka, Oluvil, Sri Lanka., 2021)

Monosodium L-glutamate (MSG) is a common ingredient that is added to food to enhance its taste. However, due to the negative perception of consumers towards MSG, most food manufacturers do not inform customers if MSG has ...

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