Chemistry: Recent submissions

Now showing items 81-100 of 445

Antioxidant activity and chemical constituents of methanolic extract of Durio zibethinus Murr. (durian) peels

Perera, P.J.; Binuwangi, A.K.D.M.; Silva, A.A.G.; Attanayake, R.N.; Wickramarachchi, S.R.; Rajapakse, C.S.K. (MEDICINAL PLANTS - INTERNATIONAL JOURNAL OF PHYTOMEDICINES AND RELATED INDUSTRIES, 2021)

This study aimed to determine the DPPH free radical scavenging activity, total phenolic content (TPC) and total flavonoid content (TFC) of methanolic extract of Durio zibethinus Murr. (durian) peels and its fractions. The ...
Medicinal plants commonly used against cancer in traditional medicine formulae in Sri Lanka.

Kuruppu, A. I.; Paranagama, P.; Goonasekara, C. L. (Saudi Pharmaceutical Journal, 2019)

Cancer is a global burden. In low- and middle-income countries around 70% of deaths are due to cancer. For a number of years natural products have been a good source of agents for combatting cancer and plants have played ...
Volatile Chemical Constituents and Bioactivity of Selected Piper Species in Sri Lanka

Jayarathna, S.P.N.C.; Athapattu, Ruvini; Senanayake, Priyanganie; Paranagama, Priyani. (International Journal of Modern Botany, 2021)

The Genus Piper comprises with many economically and medicinally important species in which essential oil is one of the major secondary metabolites responsible for medicinal properties of these plants. The present study ...
A secondary metabolite with in vitro radical scavenging activity from endolichenic fungus Daldinia eschscholzii found in lichen, Parmotrema sp. in Sri Lanka

Manthrirathna, M.; Kandiah, R.; Gunasekera, D.; Samanthi, K.; Welideniya, D.; Maduranga, H.; Paranagama, P. (Journal of the National Science Foundation of Sri Lanka, 2020)

Endolichenic fungi, an unexplored group of microorganisms, are a promising source of bioactive compounds. Secondary metabolites were isolated from the chloroform fraction of crude ethyl acetate extract of endolichenic ...
A Novel Cytotoxic Compound From the Endolichenic Fungus, Xylaria psidii Inhabiting the Lichen, Amandinea medusulina

Santhirasegaram, S.; Wickramarachchi, S. R.; Attanayake, R. N.; Weerakoon, G.; Samarakoon, S.; Wijeratne, K.; Paranagama, P. A. (Natural Product Communications, 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 ...
Antimicrobial Compounds Isolated from Endolichenic Fungi: A Review

Wethalawe, A.N.; Alwis, Y.V.; Udukala, D.N.; Paranagama, P.A. (Molecules 2021, 2021)

A lichen is a symbiotic relationship between a fungus and a photosynthetic organism, which is algae or cyanobacteria. Endolichenic fungi are a group of microfungi that resides asymptomatically within the thalli of lichens. ...
Comparative study on the intervention of ‘Spice’ Mixture (SM) prepared by Natural Food Additives (NFA) alone or intervention of SM with mind calming exercise in the management on female obesity

Manuha, M.I.,; Paranagama, P.; Nageeb, B M.; Iqbal, N.Z. (Indian Journal of Traditional Knowledge, 2020)

Obesity has become huge health problem in the entire world. In Sri Lanka, the prevalence of obesity is estimated to be 20.3% in men and 36.5% in women in four provinces. Further, the highest prevalence rate in Western ...
Pheromone baited biopesticide for control of Leucinodes orbonalis Guenee in brinjal plant

Nusra, M.S.F.; Paranagama, P.A.; Amarasinghe, L.D.; Udukala, D.N. (Frontiers in Bioscience, Elite, 2020)

Leucinodes orbonalis Guenee, Brinjal fruit and shoot borer (BFSB), is the major pest on brinjal world wide. Larvae of this pest cause the damage; which at initial stages adversely affect the shoot growth, and in later ...
Identification of Novel Bioactive Compounds, Neurosporalol 1 and 2 from an Endolichenic Fungus, Neurospora ugadawe Inhabited in the Lichen Host, Graphis tsunodae Zahlbr. from Mangrove Ecosystem in Puttalam Lagoon, Sri Lanka

Maduranga, H.; Weerasinghe, W.; Attanayake, R.; Santhirasegaram, S.; Shevkar, C.; Kate, A.; Weerakoon, G.; Samanthi, K.; Kalia, K.; Paranagama, P. A. (ASSIIAN JOURNAL OF CHEMIISSTRY, 2021)

Endolichenic fungi (ELF) have been recognized as a promising source of bioactive secondary metabolites. Sri Lanka, a biodiversity hotspot, harbours a remarkable diversity in mangrove ecosystems. In the present study, ...
Volatiles from host plant brinjal attract the brinjal Fruit and Shoot Borer -Leucinodes orbonalis Guenee

Nusra, M. S. F.; Udukala, D. N.; Amarasinghe, L. D.; Paranagama, P. A. (Journal of Asia-Pacific Entomology, 2021)

Brinjal Fruit and Shoot Borer- Leucinodes orbonalis Guenee is a major insect pest on brinjal- Solanum melongena worldwide. An effective strategy used in developing pest controlling agents is the synergism between ...
Natural Antibrowning Agents against Polyphenol Oxidase Activity in Annona muricata and Musa acuminata

Weerawardana, Michelle; Thiripuranathar, Gobika; Paranagama, Priyani (Journal of Chemistry, vol. 2020, 2020)

Fresh-cut fruits and vegetables emerge as popular food for consumers in retail markets. However, a loss of millions of dollars yearly to the food industry has been due to discoloration of fruits and vegetables caused by a ...
Daily intake of essential minerals through drinking water in a chronic kidney disease of unknown etiology prevalence area, Sri Lanka

Botheju, W.S.M.; Liyanage, J.A.; Kannangara, S.D.P. (Proceedings of the Research Conferenc e in Health Sciences 2021, 2021)

Background: Chronic Kidney Disease of unknown etiology (CKDu) is increasing at an alarming rate in North Central Province, Sri Lanka. Based on previous observations, CKDu has a profound relationship with drinking water ...
Fungal pretreatment to enhance the yield of phytochemicals and evaluation of α-amylase and α- glucosidase inhibition using Cinnamomum zeylanicum (L.) quills pressurized water extracts

Madushika Wariyapperuma, W.A.N.; Kannangara, S; Wijayasinghe, Y.S.; Subramanium, S (Lett Appl Microbiolgy, 2021)

Bioactive compounds entrapped in plant materials can be effectively recovered using fungal enzymes. Cinnamomum zeylanicum Sri Wijaya (SW) and Sri Gemunu (SG) accessions and commercially available C. zeylanicum (CC) ...
Removal of Fluoride from Drinking Water Using Protonated Glycerol Diglycidyl Ether Cross-Linked Chitosan Beads

Pathirannehe, P.; Rajapakse, C.S.K.; Fernando, T.D. (Chem. Chem. Technol., 2021)

In this study, physically and chemically modified chitosan; protonated glycerol diglycidyl ether cross-linked chitosan beads (GDCLCB/H+) were prepared and characterized using FTIR and SEM. The optimum defluoridation capacity ...
Quest to Assess Potentially Nephrotoxic Heavy Metal Contaminants in Edible Wild and Commercial Inland Fish Species and Associated Reservoir Sediments; a Study in a CKDu Prevailed Area, Sri Lanka

Dayananda, N.R.; Liyanage, J.A. (Expo Health 13, 2021)

Inland fish is one of the main protein sources of the regular diets of remote communities in Sri Lanka where the incidences of chronic kidney disease of unknown etiology (CKDu) have significantly increased. Nevertheless, ...
Effect of chain length and saturation of the fatty acids in dietary triglycerides on lipid metabolism in Wistar rats

Senanayake, C. M.; Hapugaswatta, H.; Samarawickrama, G. R.; Jayathilaka, N.; Seneviratne, K. N. (Journal of Food Biochemistry, 2021)

We investigated the effect of the chain length and the degree of saturation of fatty acids in dietary triglycerides on serum lipid profiles and hepatic lipid metabolism in Wistar rats. Fat component of the basal diet ...
Effect of Benzene Derivatives as Guest Molecules on Semiconductor Properties of MOF-199

Zahadiya, H.; Wijesundera, R. P.; Hettiarachchi, C. V. (ChemistrySelect, 2021)

A metal organic framework, MOF-199, has been synthesized under solvothermal conditions. Powder X-ray diffraction (PXRD) pattern, Fourier-transform infrared spectra (FT-IR) and scanning electron microscopic images (SEM) ...
Phyto-extraction of Chromium from Polluted Terrestrial Environments by Talinum triangulare (Ceylon Spinach) and the effect of External Chelators on the Chromium Extraction Potential

Jayalath, K.G.; De Silva, R.C.L.; Deeyamulla, M.P. (Research Journal of Chemistry and Environment, 2020)

The study was carried out to investigate the potential of Talinum triangulare (Ceylon Spinach) to remediate Cr contaminated soil under greenhouse conditions. In primary studies, T. triangulare showed significant resistance ...
Chemical characteristics of wet precipitation at Peradeniya in Sri Lanka

Liyandeniya, A.B.; Deeyamulla, M.P.; Abeysundara, S.P. (Environ Monit Assess, 2020)

The purpose of this research was to study chemical characteristics of precipitation in Peradeniya (Latitude 6.973701, Longitude 79.915256), Kandy District in Sri Lanka. This study was conducted during 2012 to 2014, and wet ...
Demystifying Chronic Kidney Disease of Unknown Etiology (CKDu): Computational Interaction Analysis of Pesticides and Metabolites with Vital Renal Enzymes

Rajapaksha, Harindu; Pandithavidana, Dinesh R.; Dahanayake, Jayangika N. (Biomolecules, 2021)

Chronic kidney disease of unknown etiology (CKDu) has been recognized as a global non‐ communicable health issue. There are many proposed risk factors for CKDu and the exact reason is yet to be discovered. Understanding ...

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