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Faculty of Science: Recent submissions

Now showing items 1-20 of 38

Trehalose Induces Antagonism towards Pythium debaryanum in Pseudomonas fluorescens ATCC 17400

Gaballa, A.; Abeysinghe, P.D.; Urich, G.; Matthijs, S.; De Greve, H.; Cornelis, P.; Koedam, N. (1997-09-03)

Pseudomonas fluorescens ATCC 17400 shows in vitro activity against Pythium debaryanum under conditions of iron limitation. A lacZ reporter gene introduced by transposon mutagenesis into the P. fluorescens ATCC 17400 ...
Genetic differentiation between Bruguiera gymnorhizaand B. sexangula in Sri Lanka

Abeysinghe, P.D.; Triest, L.; De Greef, B.; Koedam, N.; Hettiarachi, S. (University of Ruhuna, Matara, Sri Lanka, 1999)

The identification of populations of Bruguiera sexangula, Bruguiera gymnorhiza and their putative hybrids in the field is difficult using only morphological and phenological characters. Using a PCR based technique, RAPD ...
Genetic and geographic variation of the mangrove tree Bruguiera in Sri Lanka

Abeysinghe, P.D.; Triest, L.; De Greef, B.; Koedam, N.; Hettiarachi, S. (University of Ruhuna, Matara, Sri Lanka, 2000)

The variation in two Bruguiera species in populations from different climatic and macrogeographic regions along the western to southeastern coastal area in Sri Lanka was studied using RAPD (Random Amplified Polymorphic ...
Comparative study of the disjunct zonation pattern of the grey mangroove Avicennia marina(Forsk) vierh. In gazi bay (Kenya).

Dahdouh-Guebas, F.; De Bondt, R.; Abeysinghe, P.D.; Kairo, J.G.; Cannicci, S.; Triest, L.; Koedam, N. (2004)

The disjunct zonation pattern of Avicennia marina (Forsk.) Vierh., frequently observed along the Kenyan coast as a landward and a seaward zone, has been studied on a morphological level and complemented with preliminary ...
Evaluation of antibacterial activity of different mangrove plant extracts

Abeysinghe, P.D.; Wanigatunge, R.P.; Pathirana, R.N. (University of Ruhuna, Matara, Sri Lanka, 2006-09)

Antibacterial activity of mature leaves, tender leaves and bark extracts of Avicennia marina, Avicennia officinalis and Bruguiera sexangula were evaluated using Soxhelt extrac- tion method. Petroleum ether, chloroform, ...
Molecular Characterization of Cinnamon (Cinnamomum Verum Presl) Accessions and Evaluation of Genetic Relatedness of Cinnamon Species in Sri Lanka Based on TrnL Intron Region, Intergenic Spacers Between trnT-trnL, trnL-trnF, trnH -psbA and nuclear ITS

Abeysinghe, P.D.; Wijesinghe, K.G.G.; Tachida, H.; Yoshda, T. (University of Ruhuna, Matara, Sri Lanka, 2009)

Cinnamomum verum is one of the most important spice species in Sri Lanka and it contributes to 70% of the world bark production. There are 9 Cinnamomum species found in Sri Lanka. Although it is a very important spice ...
Antibacterial Activity of some Medicinal Mangroves against Antibiotic Resistant Pathogenic Bacteria

Abeysinghe, P.D. (University of Ruhuna, Matara, Sri Lanka, 2010-04-03)

The antibacterial activity of the leaves and bark of mangrove plants, Avicennia marina, A. offi cinalis, Bruguiera sexangula, Exoecaria agallocha, Lumnitzera racemosa, and Rhizophora apiculata was evaluated against ...
Screening of Petroleum ether, Chloroform, Ethyl acetate, Ethanol and Water Extracts of Medicinal Plant, Avicennia marina for Antibacterial Activity against Antibiotic Resistant Bacteria Species, Staphylococcus and Proteus

Abeysinghe, P.D.; Weeraddana, C. De S. (University of Ruhuna, Matara, Sri Lanka, 2011-01)

The secondary metabolites of the young leaves of Avicennia marina were obtained by sequential Soxhlet extracts with petroleum ether, chloroform, ethyl acetate, ethanol and water as solvents. Antibacterial activity against ...
Antibacterial activity of aqueous and ethanol extracts of mangrove species collected from Southern Sri Lanka

Abeysinghe, P.D. (University of Ruhuna, Matara, Sri Lanka, 2012-03-10)

Objective: To study the antibacterial activity of mangrove extracts against clinical isolates of Shigella sp., Pseudomonas sp. and antibiotic resistant bacteria, Staphylococcus aureus and Proteus sp. Methods: Crud aqueous ...
Preliminary investigation for the identification of Sri Lankan Cinnamomum Species using randomly amplified polymorphic DNA (RAPD) and sequence related amplified polymorphic (SRAP) markers

Abeysinghe, P.D.; Samarajeewa, N.G.C.D.; Li, G.; Wijesinghe, K.G.G. (University of Ruhuna, Matara, Sri Lanka, 2014-09)

Cinnamon is one of the important minor export crops in Sri Lank. Cinnamomum verum presl is known as true cinnamon and seven other wild cinnamomum spp. Such as C. dubium Nees, C. citriodorum Thw., C. capparu- coronde Blume, ...
Determination of optimum dosage of the mutagen ethyl methanesulphonate (EMS) for mass treatment of shoot tips of banana variety ‘Agra’

Shirani, D.A.; Niroshani, K.A.C.; Gaminie, A.W.; Abeysinghe, P.D. (Agriculture Research Station, Telijjawila, Sri Lanka, 2016)

Fusarium wilt disease is the main threat to the commercial cultivation of kolikuttu (silk) banana (Musa spp.). Therefore, efforts were made to improve Kolikuttu banana through induced mutation to enable development of ...
Refinement of the Taxonomic Structure of 16SrXl and 16SrXIV Phytoplasmas of Gramineous Plants using Multilocus Sequence Typing

Abeysinghe, S.; Abeysinghe, P.D.; De Silva., Kanatiwela.; Udagama, P.; Warawichanee, K.; Aljafar, N.; Kawicha, P.; Dickinson, M. (The Americal Phytopathological Society, 2016-06-04)

Phytoplasmas that infect gramineous plants, including Napier grass stunt, sugarcane whiteleaf, sugarcane grassy shoot, and Bermuda grass whiteleaf, have been classified into two closely related groups, 16SrXI and 16SrXIV, ...
Review article on Calotropis (Wara): Is it a miracle shrub or just a plant?

Abeysinghe, P.D. (University of Ruhuna, Matara, Sri Lanka, 2018-09)

Apocynaceae Juss. (The Angiosperm Phylogeny Group, 2016) commonly called as the dogbane family, comprises 357 genera and about 5100 species (Nazar et al., 2013) of flowering plants including herbaceous or shrubby climbers ...
Taxonomic value of the petiole anatomy in the genus Cinnamomum (Lauraceae) found in Sri Lanka.

Abeysinghe, P.D.; Scharaschkin, T. (University of Ruhuna, Matara, Sri Lanka, 2019-06)

We assessed the petiole anatomy of 8 species of Sri Lankan Cinnamomum (C. capparu-coronde, C. citriodorum, C. dubium, C. litseaefolium, C. ovalifolium, C. rivulorum and C. sinharajaense and C. verum) belonging to the family ...
Comparative anatomy of two forms of Sri Lankan Calotropis gigantea (L.) R. Br. (Family Apocynaceae s.l. – Subfamily Asclepiadoideae) -Taxonomic implications

Abeysinghe, P.D.; Scharaschkin, T. (University of Peradeniya, 2022-09-21)

Calotropis gigantea (L.) R. Br. is considered a versatile plant that has been described in Ayurvedic medicine. Two forms of C. gigantea, differing in flower colour (purple and white) occur in Sri Lanka. In the absence of ...
Comparative Analysis of the Antibacterial Activity of Sri Lankan Black Tea from Different Geographical Areas

Thennakoon, T.M.E.S.; Abeysinghe, P.D.; Pathirana, R.N.; Fernando, W.G.D.; Abeysinghe, S. (Ecronicon, 2022-02-25)

Tea is one of the most ancient and popular therapeutic beverages consumed by people all over the world. It is made from the leaves and buds of the plant “Camellia sinensis”. Tea is cultivated in more than thirty countries ...
Total phenolic content, total flavonoid content and in vitro antioxidant activities measured by the FRAP, ABTS, DPPH and ORAC assays of Sri Lankan black and green tea (Camellia sinensis) infusions

Thennakoon, T.M.E.S.; Abeysinghe, P.D.; Ranasinghe, P.; Pathirana, R.N.; White, A.; Fernando, W.G.D.; Abeysinghe, S.; Premakumara, S. (2022-08-11)

Tea is one of the most ancient and popular therapeutic beverages consumed by people all over the world. It is made from the leaves and buds of the plant “Camellia sinensis”. Tea is cultivated in more than thirty countries ...
Decision Support System for Bank Loan Classification Using Neural Network

Nandani, E.J.K.P.; Wedagedara, J.R. (Faculty of Science, University of Ruhuna, Sri Lanka, 2009-01-01)

We report the designing and application of an Artificial Neural Network (ANN) to classify the consumer loan application in banking sector. The system can be used as a “Second Level” filter, upon which shall be supplied ...
A comparative study of the forecasting bility of Backpropagation Artificial Neural Network Models with Learning Rate Adaptation for Colombo Stock Market

Nandani, E.J.K.P.; Wedagedara, J.R. (Faculty of Science, University of Ruhuna, Sri Lanka, 2011-01)

A stock market is one of the fundamental types of financial markets. The stock market can also be thought of as a highly complex and adaptive system. Financial indices defined on stock prices are used as indicators of the ...
Comparison of ARIMA and Neural Network Models for S&P SL(20) Index

Nandani, E.J.K.P.; Mahinda, M.K.; Wedagedara, J.R. (Faculty of Science, University of Ruhuna, Sri Lanka, 2015-01-23)

In the current financial world, prediction of stock prices has become a vital task. Predicting the future is important for the organizations to plan or adopt the necessary policies. Forecasting can assist them to make a ...

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