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

Now showing items 141-160 of 612

Bacterial degradation of tetracycline (TET) by TET resistant bacteria; A green solution for antibiotic pollution.

Liyanage, G. Y.; Manage, P.M. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Tetracyclines (TET) have been extensively used in aquaculture for chemotherapy against various fish diseases such as fin rot, skin ulcers. Overuse and misuse of antibiotics are widely regarded as two of the major factors ...
Comparison of the tolerance of cadmium (Cd2+), lead (Pb2+) and their mixtures by Staphylococcus sp. isolated from a water body receiving textile effluent

Aththanayake, A. M. K. C. B.; Rathnayake, I. V. N.; Deeyamulla, M. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Cd2+ and Pb2+ are widely used heavy metals in industries such as electroplating, battery, plastic and pigment production etc. These heavy metals are considered as highly threatening substances to human body, which can cause ...
Assessing the substrate degradation specificity and life stage performances of black solider fly larvae (Hermetia illucens) in different bio-degradable waste substrates

Magamage, M. P. S.; Ellawidana, D. M.; Perera, R. N. N.; Lakmini, P. K.; Priyadarshana, M. K. C. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Solid waste management has become decisive challenge in Sri Lanka where majority of the generated waste is dumped in an unsystematic way. It is highly encouraged to pursuit more reliable waste management methods in an ...
Quantification of Microplastics contamination at Bundala National Park,Sri Lanka

Dharmadasa, W.L.S.S.; Andrady, A. L.; Pradeep Kumara, P.B.T.; Gangabadage, C.S. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Microplastics (MPs) is an omnipresent contaminant in almost all environments of the world including oceans. Currently its negative consequences on ecology, economy, human health and food security have become a hot topic ...
Spatio-temporal variation of surface water quality in Kalu Oya and Mudun Ela micro-catchments during rainy season

Thotagamuwa, H. T. B. N.; Weerasinghe, V. P. A. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Kalu Oya and Mudun Ela basins are micro-catchments of the Kelani river basin mostly consisting of low-lying urbanized areas. Sri Lanka Land Reclamation and Development Corporation (SLLRDC) requires surface water quality ...
Effect of phosphorus fertilizers and soil amendments on cadmium accumulation in maize (Zea mays L.) seeds

Wanninayakea, P. C. U.; Yapa, P. N.; Malaviarachchi, M. A. P. W. K.; Hettiarachchi, R. P. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Phosphorus (P) is important for plant growth and metabolism. Higher percentage of phosphorus (up to 80%) is immobile or unavailable to uptake by plants because of adsorption, precipitation, leaching and conversion to organic ...
Evaluation of the water tolerance ability of Alysicarpus vaginalis L. as a ground cover

Subashini, J. K. W. N.; Abeywickrama, N. C.; Yakandawala, K.; Udayanga, N. W. B. A. L. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)
Effect of the fungicide manganese ethylene-bis-dithiocarbamate on in vitro growth of Agrobacterium tumefaciens

Somarathna, G. M. T. K.; Somachandra, K. P.; Attanayake, R. N. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Agrobacterium is a soil borne, Gram negative, rod shaped, motile and aerobic bacterium causing tumors on a wide range of plant species. Out of many soil inhabitant Agrobacterium species, only the pathogenic strains of ...
Cyanobacteria and 2-Methylisoborneol: the influence of Nitrogen and Phosphorous

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

2-Methylisoborneol (2-MIB) is a key compound, which causes taste and odour (T&O) issues in water. Despite of no recorded health hazards reported associated with 2-MIB, water consumers reject the water with 2-MIB due to its ...
Potential antibacterial activity of selected marine algae against foodborne bacteria

Herath, H. M. B. M. M. D.; Yapa, P. N.; Sandaruwan, M. K. K. D. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Bacterial foodborne diseases are becoming a growing public health concern worldwide, increasing the demand of antibiotics. Considering the safety of using natural antimicrobials, the objective of the present study was to ...
Determination of antimicrobial efficacy of some commercially available therapeutic mouthwashes

Rathnayake, R. M. S. U.; Jayaratne, D. L. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Mouthwashes are medically formulated liquids, which are held in the mouth and swished by the action of perioral musculature to eliminate oral pathogens. Many mouthwashes are often used by people as they are prescribed by ...
Production of certain extracellular enzymes by some bacteria and amplification of cellulase gene from Bacillus species

Jayasinghe, J. A. S. M.; Medhavi, P. I. H. R.; Magana-Arachchi, D. N.; Wanigatunge, R. P.; Herath, H. M. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Bacteria have received attention, due to their ability to produce extracellular enzymes beneficial in various industries. In the present study, extracellular enzyme production by two thermophilic bacteria (Meiothermus ...
Bacterial enzyme-mediated synthesis of silver nanoparticles and antimicrobial activity

Peiris, M. M. K.; Gunasekara, T. D. C. P.; Jayaweera, P. M.; Fernando, S. S. N. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Extracellular synthesis of silver nanoparticles (AgNPs) using bacteria has been explored for their unique physicochemical properties. Studies have shown that nitrate reductase enzyme catalyzes the bioreduction of Ag+ to ...
Heavy metal levels in Chanos chanos (Milk fish) from Negombo estuary, Sri Lanka and human health risk assessment associated with their consumption

Bandara, P. R. C. S.; Pathiratne, A. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Contamination of fish with toxic heavy metals can counteract the nutritional and health benefits of fish food on human health. Objectives of this study were to determine selected heavy metals levels viz. Aluminum (Al), ...
Ctenophores (comb jellies) found in Sri Lankan waters

Karunarathne, K. D.; de Croos, M. D. S. T. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Ctenophora is a phylum of invertebrates that live in marine waters across the world. They are notable for the presence of cilia, which are used for swimming and are the largest animals to swim with the help of cilia. ...
Microcystin -LR contamination status of Nile tilapia (Oreochromis niloticus) and biomarker response

Abeysiri, H. A. S. N.; Wanigasuriya, K.; Manage, P.M. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Microcystin-LR (MC-LR) is a cyanotoxin derived from some cyanobacteria. Nile tilapia (Oreochromis niloticus) is the most popular freshwater fish among people in Sri Lanka. MC-LR accumulation in tilapia from thirteen ...
Assessing neurotoxic potential of titanium dioxide nanoparticles and bulk form using the fish model, Nile tilapia (Oreochromis niloticus)

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

Titanium dioxide nanoparticles (nano TiO2) and bulk TiO2 are widely used worldwide in various sectors. Hence they can be released inevitably into the inland water bodies posing health threats to the aquatic ecosystems. ...
Effect of photoperiod on growth performance of Guppy fish (Poecilia reticulata)

Ramanayake, N. S.; Kumari, M. A. A. P.; Nayananjalie, W. A. D. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Light is an essential environmental factor that affects all life stages of fish. In the present study effect of different photoperiod on the growth performance of guppy juveniles (initial mean weight: 2.28 ± 0.10 g) was ...
Effect of early-life BPA exposure on maximum swimming speed of zebrafish (Danio rerio)

Pathiraja, S. P. K. S. S.; Rajapaksa, R. P. G. K. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Swimming performance is a key physiological process important in fish survival. Sensory, neural and muscular systems help in fine-tuning of swimming performance of larval fish. Early-life exposure to endocrine disruptors ...
Developmental suppressive properties of Madhuca longifolia against the cowpea bruchid, Callosobruchus maculatus (F.) (Coleoptera: Bruchidae): An effective green alternative for storage pest management.

Kaushalya, G. G. S.; Karunaratne, M. M. S. C. (4th International Research Symposium on Pure and Applied Sciences, Faculty of Science, University of Kelaniya, Sri Lanka, 2019)

Management of Callosobruchus maculatus (Coleoptera: Bruchidae), which is a major storage insect pest of legumes, relies heavily on synthetic insecticides at present. However, serious environmental and economic problems ...

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