MPhil/PhD theses: Recent submissions

Now showing items 181-200 of 743

Immunological studies on relapse infections of Plasmodium cynomolgi ceylonensis in it's natural host , Macaca sinica sinica

Nizam, Begum Zeeniya (Faculty of Medicine, University of Colombo, 1999)

Sporozoite-induced and blood-induced infections of Plasmodium cynomolgi ceylonensis in Macaca sinica sinica was studied using laboratory bred Anopheles tessellatus mosquitoes as the vector, Sporozoite-induced infections ...
Malaria Vaccine Studies on Anopheles Midgut Glycoproteins and a Plasmodium Falciparum Merozoite Surface Protein

Anavarathavinayagamoorthy, S. (Faculty of Science, University of Colombo, 2004)

Vaccination is an alternative approach to control malaria because of the development of insecticide resistance in mosquito vectors and drug resistance in parasites. In this context, two different approaches viz, transmission ...
Nano-Structured Binary-Semiconductor Composite Films for Dye-Sensitized Solid-State Solar Cells

Perera, V.P.S. (Faculty of Science, University of Colombo, 2004)

The studies reported in this doctoral thesis were conducted to investigate the dye-sensitized solar cells of the heterostructure form, n-Semiconductor system/ Rudye/ p-Copper iodide were intended to minimize charge ...
Some aspects on Ecology and Biology of Sri Lankan Bats

Digana, P.M.C.B. (Faculty of Science, University of Colombo, 2004)

In Sri Lanka, bats represent approximately one third of the total number of terrestrial mammals. However, detailed information on the biology and the ecology of bats in the island are scarce. Bats are one of the least ...
Comparison of isolates of Rhizoctonia solani and development of a DNA probe to detect Rhizoctonia solani

Weerasena, O.V.D.S.J. (Faculty of Science, University of Colombo, 2002)

Rhizoctonia solani is the causative organism of sheath blight disease of rice. In addition to rice, the fungus infects a large number of crop plants all over the world. Early detection of the pathogen is useful in ...
DNA typing the Asian elephant in Sri Lanka: An assessment of the genetic structure of the population & Establishment of paternity

Vandebona, H. (Faculty of Science, University of Colombo, 2001)

The Asian elephant. Elephas maximus is a globally threatened species. The elephant in Sri Lanka. Elephas maximus maximus, is a nominated subspecies of the Asian elephant. The elephant population in Sri Lanka is currently ...
Determination of the systematic status of the genus Cynopterus (Chiroptera: Pteropodidae) (short-nosed fruit bats) in Sri Lanka based on conventional morphology, multivariate morphometries and mitochondrial DNA sequence analysis

Mapatuna, Yasantha (Faculty of Science, University of Colombo, 2001)

The systematic status of the genus Cynopterus, especially with regard to the status of C. sphinx and C. brachyotis, is still much in debate. The aim of this study was to conduct a comprehensive systematic study to resolve ...
Chemotaxonomic Investigation on the Family Dipterocarpaceae Using Flavonoid Analysis

Joshi, Kunjani (Faculty of Science, University of Colombo, 2001)

Flavonoids are basic configuration C^- C3- C& and ubiquitous occurrence. Flavonoids have been used to solve the problems at different taxonomic levels and the three classes of flavonoids frequently used for these studies ...
Measurements and Analyses of Fast Transient Electromagnetic Fields Generated by Ground and Cloud Flashes with Special Attention to Lightning Direction Finding

Fernando, Induruwage Mahendra Kithsiri (Faculty of Science, University of Colombo, 2001)

Measurements were carried out to understand the microsecond and submicrosecond signatures of lightning generated electric fields and corresponding 3 MHz oscillation in Sri Lanka in the tropic and Denmark and Sweden in ...
Development of DNA markers for the identification of individuals in the Sri Lankan human population and its applications in forensic casework

Fernandopulle, N. (Faculty of Science, University of Colombo, 2001)

DNA typing for the identification of criminals is seen as one of the greatest technical advancements in criminal investigations. In DNA typing, the DNA itself is analysed, which means that a person’s genetic makeup can be ...
Alternative Methods to Control Postharvest Diseases of Rambutan

Sivakumar, D. (Faculty of Science, University of Colombo, 2001)

Anthracnose (Colletorrichiirn gloeosporioides) stem-end rot (Botryodiplodia theobromae) and brown spot (Gliocephloricum niicrochlamydosporurn) are the major postharvest diseases of rambutan fruit (Nephelium lappaceum Lin) ...
Numerical Solution of Darcy’s Law with Memory

Wijerathna, J.K. (Faculty of Science, University of Colombo, 2000)

I express my deep gratitude to Prof. Dr. H. Neunzert and Dr. Meth Devendra for suggesting the interesting problem, the invaluable guidance, providing the right atmosphere, the patient perusal of the write-up and the ...
A study on Corynespora cassiicola the causative agent of Corynespora leaf fall of Hevea brasiliensis

Silva, W.P.K. (Faculty of Science, University of Colombo, 2000)

leaf spot disease on more than 70 host plant species including Hevea brasiliensis. The demonstration of high morphological variability among isolates of this fungus implies the existence of different races or ...
Studies on the Basic Atmospheric Electrical Parameters of Fairweather and Related Processes in the Electrode Layer

Lelwala, Ranjith (Faculty of Science, University of Colombo, 2001)

Aeroelectrostatics and aeroelectrodynamics of basic electrical parameters and related processes in the atmospheric boundary layer under different atmospheric stratification conditions were investigated by means of numeral ...
On the nature of Lightning Flashes: with special attention to the Initiation, Modelling and Remote Sensing of Return Strokes

Gomes, G.A.C. (Faculty of Science, University of Colombo, 1999)

The temporal characteristics are analysed of preliminary breakdown pulse trains of both negative and positive ground flashes, chaotic pulse trains that are associated with negative subsequent strokes and isolated cloud ...
Sensitization of Mesoscopic and Structured Semiconductor Thin Films

Kottegoda, I.R.M. (Faculty of Science, University of Colombo, 2001)

The basic purpose of the thesis is to present studies on dye-sensitized photovoltaic solar cells based on high band gap mesoporous semiconductor films. Upon excitation with visible light, dye molecules adsorbed at the ...
Studies on In Vitro Somatic Embryogenesis of Cocos nucifera L. (COCONUT)

Fernando, W.N.I.S.C. (Faculty of Science, University of Colombo, 2001)

In vitro somatic embryogenesis is the most important means of mass propagating high quality-planting materials in Cocos nucifera L. (coconut). Despite long-term research, undertaken to develop suitable culture conditions ...
Ion- And Photon- Induced Mass Spectrometry of Natural Products: Ion Formation, Matrix Effects and Instrumentation

Coorey, R.V. (Faculty of Science, University of Colombo, 2001)

Ionization pathways and matrix-effects in plasma desorption (PD) and laser desorption (LD) time-of-flight (TOF) mass spectrometry (MS) of low-mass (0.1-1.0 kDa) natural products (alkaloids and compounds that are present ...
Development of the Time-of-Flight Mass Spectrometry Technique, and its applications

Piyadasa, C.K.G. (Faculty of Science, University of Colombo, 2000)

Development of instrumentation to enhance the mass resolution and the ion separation capabilities of plasma desorption mass spectrometers (PDMS) and matrix assisted laser desorption/ionization (MALDI) mass spectrometer ...
Initial Energy Distributions of Secondary Ions in Electronics Sputtering

Abeywarna, U.K. (Faculty of Science, University of Colombo, 1999)

This thesis presents measurements on kinetic energy of secondary ions desorbed from surfaces by MeV ion bombardment. The aim of this investigation is to get a deeper understanding of the mechanism of fast heavy ion induced ...

Now showing items 181-200 of 743

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