Browsing by Author "Gunawardhana, H.D."
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Item Ambient air quality study of the polluction caused by vehicular exhaust emission in the city of ColomboKarunasinghe, A W J.; Mathes, J.A.P.; Gunawardhana, H.D.Item Analysis of poly aromatic hydrocarbons including benzo (a) pyrene in particulate matter from vehicular exhaust emissions(1994) Mathes, J.A.P.; Karunasinghe, A.W.J.; Costa, S.; Gunawardhana, H.D.Item Application of Chemical Principles to some Industries in Sri Lanka(NSF:Colombo, 2011-01) Gunawardhana, H.D.Item Development of a low cost and productive nutrient formulation for simplified hydroponics using commercial grade chemicals(Postgraduate Institute of Agriculture, University of Peradeniya:Peradeniya, 2008) Saparamadu, M.D.J.S.; Weerakkody, W.A.P.; Gunawardhana, H.D.; Wijesekera, R.D.Item In situ determination of copper (II) and cobalt(II) using adsorptive cathodic stripping voltammetry with hydroxamic acid modified carbon paste electrode(National Science Foundation:Colombo, 2006) Senthilnithy, R.; De Costa, M.D.P.; Gunawardhana, H.D.Item The pKa values of ligands and stability constants of the complexes of Fe(III), Cu(II) and Ni(II) with some hydroxamic acids:a comparative study of three different potentiometric methods(National Science Foundation:Colombo, 2008-9) Senthilnithy, R.; De Costa, M.D.P.; Gunawardhana, H.D.Item Silent pollution due to sodium in irrigation Agriculture(NSF:Colombo, 2021-04) Gunawardhana, H.D.Item Some issues on water conservation and water quality in Sri Lanka(People's Bank. Colombo 02, 2009) Gunawardhana, H.D.Item Status of air pollution caused by vehicle emissions in Colombo city(1994) Mathes, J.A.P.; Karunasinghe, A.W.J.; Gunawardhana, H.D.Item Item Studies on the quality of irrigation waters in Kalawewa area(Nationa Science Council:Colombo, 1981) Gunawardhana, H.D.; Kumudini, A.M.; Adikari, R.Item Study on the correlation between biochemical oxygen demand (BOD) and chemical oxygen demand (COD) for different industrial waste watersAmarasinghe, H.A.U.; Gunawardhana, H.D.; Jayatunge, Y.N.A.Item Tertiary education in the physical sciences(NSF:Colombo, 1998) Dahanayake, C.; Gunawardhana, H.D.University education started in 1921 with the establishment of the Ceylon University College located adjacent to Royal College,Colombo.This became the University of Ceylon in 1942.Since then there has been a rapid increase in the number of Universities.At present there are twelve including the Open University.Teaching of physical sciences has generally kept pace with the needs of country.Course content has changed and methods of teaching and evaluation have also undergone change.More emphasis on technical education and for research relevant to the development needs of the country is needed.There is also a need to provide more incentives in all research institutions for research,orientrd towards the awards the awards the award of postgraduate degrees.