Chemistry: Recent submissions

Now showing items 101-120 of 445

Antifungal properties of chitosan microcapsules containing cinnamon oil and lemongrass oil against aspergillus flavus isolated from stored rice

Paragodaarachchi, Yashodha L.; Subasinghe, Prarthana; Wickramarachchi, Suranga R. (ACTA CHEMICA IASI, 2020)

Essential oils have long been attracted as substitutes for synthetic chemical pesticides because of their antimicrobial properties, low mammalian toxicity and wide public acceptance. Essential oils of lemongrass and ...
Antioxidant Potential of Novel Designed Phenolic Derivatives: Computational Insights

Dinesh, R. Pandithavidana; Kushani, S. K. Hewage (Chemistry & Chemical Technology, 2020)

Density functional theory calculations were applied for designed phenolic antioxidant derivatives. The reaction enthalpies related to various mechanisms of primary antioxidant action were deliberated in detail. ...
Antioxidant and Nutritional Properties of Domestic and Commercial Coconut Milk Preparations

Karunasiri, A.N.; Gunawardane, M.; Senanayake, C.M.; Jayathilaka, N.; Senevirathne, K.N. (International Journal of Food Science, 2020)

The aqueous extract of scraped coconut kernel is known as coconut milk. Coconut milk preparations are also commercially available in the form of desiccated powders or liquids. While these various coconut milk preparations ...
Protective Effect of Coconut Oil Meal Phenolic Antioxidants against Macromolecular Damage: In Vitro and In Vivo Study

Karunasiri, A.N.; Senanayake, C.M.; Hapugaswatta, H.; Jayathilaka, N.; Seneviratne, K.N. (Journal of Chemistry, 2020)

Coconut oil meal, a cheap by-product of coconut oil production, is a rich source of phenolic antioxidants. Many age-related diseases are caused by reactive oxygen species- (ROS-) induced damage to macromolecules such as ...
A Novel Cytotoxic Compound From the Endolichenic Fungus, Xylaria psidii Inhabiting the Lichen, Amandinea medusulina

Santhirasegaram, S.; Wickramarachchi, P.A.S.R.; Attanayake, R.N.; Weerakoon, G.; Samarakoon, S.; Wijeratne, K.; Paranagama, P.A. (Natural Product Communication, 2020)

The lichen host, Amandinea medusulina, collected from mangrove habitats in Sri Lanka, and its associated endolichenic fungi were isolated and identified by rDNA-ITS sequence analysis and morphological features. One of the ...
Qualitative analysis of heavy metal adsorption by the green synthesized silver nanoparticles,

Ramanayake, R.A.D.J.; Wickramarachchi, P.A.S.R. (Proceedings of the 1st International Conference on Frontiers in Chemical Technology, Institute of Chemistry Ceylon, 2020)

Silver nanoparticles (AgNPs) have attracted high research interest because of their important applications in antimicrobial, cataiysis, and water treatment plants. They dispray totarly new and. errhanced properties compared ...
Exploring bioactive compounds in the endolichenic fungus, Xylaria feejeensis, inhabiting the lichen, Graphis librata, collected from Negombo lagoon, Sri Lanka

Gunawardhana, M.H.A.Y.; Wickramarachchi, P.A.S.R.; Weerasinghe, W.R.H.; Paranagama, P.A. (Proceedings of the 1st International Conference on Frontiers in Chemical Technology, Institute of Chemistry Ceylon, 2020)

The accelerating pharmaceutical problem ofbacteria growing resistant to existing antibrotics forces the scientific community to search for new antibacterial compounds for antibiotic drug development. I-iterature reveals ...
Toxic potential of green synthesized silver nanoparticles using Annona glabra leaf extract against Daphnia magna

Paragodaarachchi, Y.L.; Wickramarachchi, P.A.S.R.; De Silva, C.R.; Amarasinghe, L.D. (Proceedings of the 1st International Conference on Frontiers in Chemical Technology, Institute of Chemistry Ceylon, 2020)

This study aims to evaluate the acute toxicity of biosynthetic AgNPs produced using Annona glabra leaf extract, against a selected aquatic-indicator, Daphnia magna. The toxicity of the biosynthetic AgNPs was compared against ...
Potential of bio fabricated Annona glabra - silver nanoparticles to control Aedes aegypti and Aedes albopictus

Aberathna, A.A.A.U.; Amarasinghe, L.D.; Sithara, W.S.; Wickramarachchi, S.; De Silva, C.R. (, Proceedings of the 1st International Conference on Frontiers in Chemical Technology, Institute of Chemistry Ceylon, 2020)

Bio synthesized silver nanoparticles using Annona glabra leaf extract (An-AgNPs) as the reducing and stabrlizing agent were assessed as a novel larvicide against dengue vector mosquito larvae. The fresh leaves of A. glabra ...
Antibacterial activity of the partitioned fractions of endolichenic fungus Xylaria feejeensis collected from the mangrove plant Rhizophora mucronate in Negambo Lagoon, Sri Lanka

Gunawardhana, M.H.A.Y.; Wicramarachchi, S.; Weerasinghe, W.R.H.; Paranagama, P.A. (Proceedings of 7th Ruhuna International Science & Technology Conference, 2020)

Endolichenic fungi (ELF) are known for biosynthesizing secondary metabolites with antifungal, cytotoxic, antioxidant and antibacterial activity to protect their lichen against radiation, microbial invasions and harsh ...
Potential Antibacterial Secondary Metabolites froe an Enadolichenic Fungus Inhabiting a Lichen Collected from Negombo Lagoon, Sri Lanka

Weerasinghe, W.R.H.; Gunawardhana, M.H.A.Y.; Wickramarachchi, S.; Attanayake, R.N.; Weerakoon, G.; Paranagama, P.A. (International Postgraduate Research Conference 2019, 2019)

With the revelation of intriguing bioactive properties from natural sources, the thirst to investigate more into the mysteries of nature has immensely expanded. Endolichenic fungi (ELF) became an interesting source during ...
Comparative study on larvicidal activity of green synthesized silver nanoparticles and Annona glabra (Annonaceae) aqueous extract to control Aedes aegypti and Aedes albopictus (Diptera: Culicidae)

Amarasinghe, L.D.; Wickramarachchi, P.A.S.R.; Aberathna, A.A.A.U.; Sithara, W.S.; De Silva, C.R. (Heliyon 6, 2020)

The present study reports mosquito larvicidal potential of green synthesized silver nanoparticles by using Annona glabra leaves (An-AgNPs). Synthesized An-AgNPs were characterized by Ultraviolet-Visible spectroscopy (UVVIS), ...
Production of extracellular amylase by Aspergillus niger under submerged fermentation using jack fruit rag as the carbon source

Piyarathne, S.A.P.M.; Weerasooriya, M.K.B. (Indian Journal of Traditional Knowledge, Vol 19(1), 2020)

Production of extracellular amylase by Aspergillus niger was studied under submerged fermentation using jackfruit rag as the carbon source. Different parameters, such as incubation period, pH of the culture broth and level ...
Computational investigation of pesticide induced oxidative stress and its impact on the Chronic Kidney Disease of unknown etiology (CKDu)

Pandithavidana, D. R.; Deshan, T. M. V. (International Journal of Science, Environment and Technology, 2019)

The chronic kidney disease of unknown etiology (CKDu) has been a major health issue in Sri Lanka within the last three decades. Many investigative efforts have been carried out to identify its unknown origin and several ...
Molecular docking studies to identify secondary metabolites present in Ashwagandharishta and their effectiveness towards memory related disorders

Pandithavidana, D. R.; Munaweera, R. K. W. (Global Journal of Engineering Science and Research Management, 2019)

Ashwagandharishta is a famous Ayurveda medicine (in Asian countries) that is used to treat psychiatric conditions, dullness, memory related diseases, anxiety, schizophrenia sluggishness, epilepsy, depression and etc. Memory ...
Computational Investigation of Structural, Electronic and Thermodynamic Properties of Nonylphenolethoxylate Surfactants

Pandithavidana, D. R.; Jayalath, W. I. M. (International Journal of Science, Environment and Technology, 2019)

Nonylphenol ethoxylates (NPEs) are group of non-ionic surfactants commonly known as Tergitol NP surfactants. The hydrophilic-lipophilic-balance (HLB value) is used as the key parameter by surfactant formulators to study ...
A NEW ANTIOXIDANT ACTIVE COMPOUND FROM THE ENDOLICHENIC FUNGUS, PENICILLIUM CITRINUM INHABITING THE LICHEN, PARMOTREMA SP

Wickramarachchi, S.A.; Samanthi, U.; Wijeratne, K.; Paranagama, P.A. (International Journal of Pharmaceutical Sciences and Research, 2019)

Context: Endolichenic fungi are the microorganisms living inside the thalli of the lichen and found to be a new source of bioactive secondary metabolites. This is an underutilized source of bioactive compounds and has not ...
ZnS Assisted ZN Doping in CdZnS Electrodeposition

Sarathchandra, K. A. D. M. S.; De Silva, D. S. M.; Pathiratne, K. A. S. (Journal of Science 2019, Department of Chemistry, University of Kelaniya, Sri Lanka, 2019)

Many reports have been published elsewhere on making thin films of cadmium zinc sulphide (CdZnS) using different techniques. This article summarizes a method developed to form CdZnS by incorporating electrodeposited Cd ...
Occurrence of organic pollutants: pahs in water bodies around kelanitissa and kerawalapitiya power plants in Sri Lanka

Chandrasiri, H.M.H.B.; Doole, F.T.; Subramanium, S.S. (Journal of Science 2019, Department of Chemistry, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Polycyclic aromatic hydrocarbons (PAHs) are a group of organic compounds with more than one benzene ring formed due to natural processes such as forest fires and anthropogenic activities. These ubiquitous contaminants ...
Development of ZnO Thin Films for Gas Sensing Applications

Tharangika, M.O.; Atapattu, H.Y.R.; De Silva, D.S.M. (International Research Conference (IRCUWU 2019),”Sustainable Business Transition through Technology and Innovation”, Uva Wellassa University of Badulla, Sri Lanka, 2019)

In recent decades' gas sensing technology has become significant due to its widespread and common applications in the areas of industrial production, automotive industry, medical applications, indoor air quality supervision ...

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