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International Research Symposium on Pure and Applied Sciences (IRSPAS): Recent submissions

Now showing items 101-120 of 612

Evaluation of leaf quality on food search behavior of Cryptolaemus montrouzieri larvae (Coleoptera: Coccinellidae), a predatory beetle of mealybugs

Wijekoon, W. M. S.; Warnasooriya, P. G. A. S.; Hemachandra, K. S. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Several groups of insect pests such as mealybugs, whiteflies and scale insects are successfully controlled by the predatory beetle mealybug destroyer, Cryptolaemus montrouzieri (Coleoptera: Coccinellidae). Both adult and ...
Derive and validate an allometric model for the biomass gain of Tectonia grandis (Teak) in Sri Lanka

Wijayasenarathne, K. A. S. H.; Bandara, W. A. R. T. W. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Forest plantations play a crucial role in mitigating climate change. Tectonia grandis has the highest occupancy among plantation species in Sri Lanka, expanding into 23266.5 ha in 2018. Objective of this study was to develop ...
In vitro anti-inflammatory and antioxidant properties of peel extract of selected fruits of the citrus family

Hettiarachchi, H. A. C. O.; Gunathilake, K. D. P. P.; Jayatilake, S. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

The potential of citrus peel extract in delivering anti-inflammatory and antioxidant properties were evaluated using in-vitro assays. Methanolic extracts of freeze dried peels of Ambul Dodam – Citrus aurantium, Lime – ...
Antioxidant activity and physicochemical properties of Flacourtia indica (Uguressa) at different maturity stages

Kasunmala, I. G. G.; Navarathne, S. B.; Wickramasinghe, I. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Flacourta indica is an underutilized fruit, which grows wild in bush and its fruits are generally consumed fresh at fully matured and ripe stages. Physicochemical, antioxidant and sensory properties of fruits shows a ...
Preliminary study for determination of plot-scale storm runoff at Yagirala Forest Reserves; a secondary lowland tropical wet evergreen forest

Chandrathilake, G. G. T.; Rathnayke, R. M. S. N.; Tanaka, N. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Surface runoff is an important element in the hydrological processes. Storm runoff is produced when the rainfall intensity exceeds the infiltration rate. The occurrence and quantity of surface runoff is dependent on the ...
Soil Actinomycetes: potential source of novel antimicrobial substances

Gunasinghe, Y. H. K. I. S.; Edirisinghe, E. A. A. D. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Antimicrobial resistance has been recognized as an escalating problem that makes a huge impact on health and brings the economic outcomes down, through the increase of hospital costs, resource utilization and health care ...
Comparison of different RNA extraction protocols: An optimized RNA extraction protocol for tea leaves [Camellia sinensis (L.) O. Kuntze]

Keerthika, V.; Ranatunga, M. A. B.; Perera, D.; Herath, H. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Extracting high-quality RNA is critical for downstream applications such as quantitative real time PCR (qRT PCR), RNA sequence based transcriptomics and a prerequisite for ensuring representation of all expressed genes in ...
Production and quality evaluation of watermelon (Citrullus lanatus) jam using pectin extracted from lemon (Citrus limon L.) peels

Dhushane, S.; Mahendran, T. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

One of the major challenges facing the food industry throughout the world, is the full utilization of the waste material. Huge amount of solid fruit waste cause environmental health hazards, which is on the increase. During ...
Effect of banana, orange and pomegranate peels on okra (Abelmoschus esculentus) yield

Dayarathna, S.G.A.R.M.; Karunarathna, B. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Fruit peel waste is one type of agro wastes accumulated in large quantity every day. The discarded fruit peels contain a diverse range of nutrients and antimicrobial compounds, which can be utilized in agriculture. Okra ...
Infection with digenetic metacercariae of Yellow Grub, Clinostomum sp. (Trematoda, Clinostomidae) in a wild fish population in Sri Lanka

Jayakody, J.A.H.C.; Epa, U. P. K. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Spike tail paradise fish, Pseudophromenus cupanus (Cuvier, 1831) is a freshwater fish found only in Sri Lanka and South India. P. cupanus was sampled using a hand net from a freshwater lake, Dadagamuwa wewa in Gampaha ...
Isolation, identification and characterization of phosphate solubilizing bacteria from rhizosphere soil of Aloe vera and Vigna unguiculata

Chamikara, H.J.M.P.; Edirisinghe, E. A. A. D. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Phosphorus (P) is an essential element, which is next only to nitrogen, influencing plant growth and productivity. Unlike nitrogen, this element is not acquired through biochemical fixation, but comes from other sources ...
Isolation of mycorrhizal fungi in selected epiphytic orchids and investigation of the effect of potential host bark extracts on seed germination under in vitro condition.

Premachandra, J. A. H. P.; Senanayake, S. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Orchids (Family: Orchidaceae) are one of the largest, diverse plant groups in the world with high ornamental value. Orchid seed germination, in nature, is reported to be influenced by the mycorrizal fungi associated in the ...
Comparison of the floral diversity at Beddagana and Diyasaru Urban Wetlands Parks, Colombo, Sri Lanka

Senevirathne, G. G. G. R. D.; Janaarthan, G.; Sivaseelan, M.; Rathnayake, H. M. C. L.; Gunawardena, M. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

The district of Colombo is endowed with a variety of wetlands, mainly compromised of abandoned paddy fields, man-made lakes, and marshes. Since the 1980s, Colombo has lost almost 60% of its wetland area. Losing an average ...
Preliminary survey on avifaunal diversity at Bellanwila-Attidiya Sanctuary, Sri Lanka

Dissnayake, D. M. D. S. M.; Jayasinghe, V.; Gunawardena, M. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Sri Lanka shelters a rich avifaunal diversity and the Bellanwila – Attidiya sanctuary (BAS) is of much importance as a habitat for birds. The diurnal avifaunal diversity was studied along the Nedimala canal of the Weras ...
Preliminary survey on avifaunal diversity in an urban ecosystem: Malabe,Sri Lanka

Dissanakayake, D. M. D. S. M.; Gunawardena, M. P.; Hathurusinghe, D. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Permanent changes caused due to urbanization have resulted in wide-ranging impacts on the avifauna. Altered environmental conditions such as air pollution, artificial light, garbage pollution, different predation pressures ...
Determination of the minimum concentration of zinc sulfate that affects to the growth of Azotobacter beijerinckii (DSM 378)

Thanthrige, L. C.; Gunawardana, M. M. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Nitrogen-fixing activity of Azotobacter gives considerable contribution to the promotion of soil fertility through the supply of nitrogen for the plant growth. Azotobacter beijerinckii is a diastrophic microorganism. Oxygen ...
Determination of polycyclic aromatic hydrocarbons in black tea at different processing stages.

Sithara, T. A. H.; Marapana, R. A. U. J.; Liyanage, R.; Senanayaka, S. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Polycyclic Aromatic Hydrocarbons (PAHs) are ubiquitous organic molecules considered as environmental pollutants, generally enter to the environment during incomplete combustion of organic materials. Various foods have been ...
Isolation and identification of litter decomposing fungi in Nagacholai Forest Reserve, Mullaitivu, Sri Lanka

Bopitiya, B. D. S. S.; Dewangani, H. G. N.; Perera, H. W. K.; Premachandra, J. A. H. P.; Senevirathna, M. A. T. M.; Kalpani, N. N.; Kodituwakku, T. D.; Kannangara, S. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Nagacholai Forest Reserve, which was disturbed by local terrorism before 2009, is located in Mullaitivu District in the Northern Province of Sri Lanka. It is a tropical dry zone forest, administrated by the Department of ...
Effect of drying methods on the total flavonoid content, total phenolic content and total antioxidant capacity of five plant leaves with potential use in cosmetics

Gamage, D. G. N. D.; Abeysinghe, D. C.; Wijesekara, R. G. S.; Prathapasinghe, G. A.; Dharmadasa, R. M.; Someya, T. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Drying is the most common and fundamental method for post-harvest preservation of medicinal plant materials. It allows the quick conservation of medicinal qualities of plant materials in an uncomplicated manner. However, ...
Release of curcumin from chickpea protein submicron particles at gastrointestinal pH values

Shakoor, I. F.; Pamunuwa, G.; Karunaratne, D. N. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Activity of bioactive components such as curcumin, which is a natural polyphenolic compound, depends on their stability, solubility, absorption and bioavailability at specific sites. Development of natural polymer based ...

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