Prof. K R Ranjith Mahanama
Department of Chemistry
RESEARCH ABSTRACT PRESENTATIONS
Publication Types:
Validated method for determination of total amino acids in rice using reversed-phase high performance liquid chromatography (RP-HPLC)
Liyanarachchi, G.V.V.; Mahanama, K.R.R.; Somasiri, H.P.P.S.; Punyasiri, P.A.N. [2019]. Validated method for determination of total amino acids in rice using reversed-phase high performance liquid chromatography (RP-HPLC). Presented at the 11th International Conference & Expo on Chromatography techniques, April 22-24, Dublin, Ireland.
Validation of a tandem mass spectrometric method for direct analysis of free amino acids in rice
Liyanarachchi, G.V.V.; Mahanama, K.R.R.; Somasiri, H.P.P.S.; Punyasiri, P.A.N. [2018]. Validation of a tandem mass spectrometric method for direct analysis of free amino acids in rice. Presented at the World Congress on Mass Spectrometry and Analytical Techniques, September 19-20, Singapore.
In vitro pro-inflammatory enzyme inhibitory activities of Artocarpus heterophyllus
Liyanaarchchi, G.D; Samarasekara, R.; Mahanama, K.R.R.; Hemalal, K.D.P. [2018]. In vitro pro-inflammatory enzyme inhibitory activities of Artocarpus heterophyllus Presented at the 5th International Conference on Multidisciplinary Approaches 2018, University of Sri Jayawardenapura, August 31- September 2, Nugegoda.
In vitro pro-inflammatory enzyme inhibitory activities of Artocarpus altills
Liyanaarchchi, G.D; Samarasekara, R.; Mahanama, K.R.R.; Hemalal, K.D.P. [2018]. In vitro pro-inflammatory enzyme inhibitory activities of Artocarpus altills Presented at the 38th Annual Sessions of Institute of Biology, Sri Lanka 2018, September 28, Colombo.
Determination of iodine and saponification value of coconut oil using an FT-NIR technique
Jayathunga, H.G.T.H.; Somasiri, H.P.P.S.; Mahanama, K.R.R. [2018]. Determination of iodine and saponification value of coconut oil using an FT-NIR technique. Presented at the Annual Research Symposium 2018, University of Colombo, November 9, Colombo
Variation of free amino acid profile among selected traditional rice varieties (Oryza sativa L.) in Sri Lanka cultivated during 2016 maha season
Liyanarachchi, G.V.V.; Mahanama, K.R.R.; Somasiri, H.P.P.S.; Punyasiri, P.A.N. Kottawaarchchi, J.D. [2017]. Variation of free amino acid profile among selected traditional rice varieties (Oryza sativa L.) in Sri Lanka cultivated during 2016 maha season. Presented at the 3rd Biennial Research Symposium 2017, November 16-17, Colombo.
Variation of free amino acid profile among selected traditional rice varieties (Oryza sativa L.) in Sri Lanka
Liyanarachchi, G.V.V.; Mahanama, K.R.R.; Somasiri, H.P.P.S.; Punyasiri, P.A.N. Kottawaarchchi, J.D. [2017]. Variation of free amino acid profile among selected traditional rice varieties (Oryza sativa L.) in Sri Lanka. Presented at the Annual Research Symposium 2016, University of Colombo, November 17, Colombo
Validation of free amino acid profile among selected traditional rice varieties (Oryza sativa L.) in Sri Lanka cultivated during the maha season
Liyanarachchi, G.V.V.; Mahanama, K.R.R.; Somasiri, H.P.P.S.; Punyasiri, P.A.N. Kottawaarchchi, J.D. [2017]. Validation of free amino acid profile among selected traditional rice varieties (Oryza sativa L.) in Sri Lanka cultivated during the maha season, 2016. Presented at the ITI Biennial Research Symposium 2017, November 6, Colombo.
Use of FT-NIR technique to determine the iodine value of edible oil
Jayathunga, H.G.T.H.; Somasiri, H.P.P.S.; Mahanama, K.R.R. [2017]. Use of FT-NIR technique to determine the iodine value of edible oil. Presented at the 3rd Biennial Research Symposium 2017, November 16-17, Colombo.
Rapid determination of adulteration in coconut oil using FT-NIR spectroscopy
Jayathunga, H.G.T.H.; Somasiri, H.P.P.S.; Mahanama, K.R.R. [2017]. Rapid determination of adulteration in coconut oil using FT-NIR spectroscopy. Presented at the International Conference on Food Quality, Safety and Security (FOOD QUALSS 2017, October 24-25, Colombo.
In vitro tyrosinase, hyaluronidase inhibitory and antioxidant activities of Artocarpus heterophyllus
Liyanaarchchi, G.D; Samarasekara, R.; Mahanama, K.R.R.; Hemalal, K.D.P. [2017]. In vitro tyrosinase, hyaluronidase inhibitory and antioxidant activities of Artocarpus heterophyllus. Presented at the Annual Research Symposium 2016, University of Colombo, November 17, Colombo.
Validation of a high performance liquid chromatographic method for the determination of free amino acids in rice using L-theanine as the internal standard
Liyanarachchi, G.V.V.; Mahanama, K.R.R.; Somasiri, H.P.P.S.; Punyasiri, P.A.N. [2016]. Validation of a high performance liquid chromatographic method for the determination of free amino acids in rice using L-theanine as the internal standard. Presented at the Annual Research Symposium 2016, University of Colombo, October 14, Colombo.
Lakmini, M.C; Mahanama, K.R.R.; [2016]. Safety concerns of PbCrO4 in enamel paints. Presented at the Annual Research Symposium 2016, University of Colombo, October 14, Colombo.
In vitro tyrosinase, inhibitory activity of Sri Lankan medicinal plants
Liyanaarchchi, G.D; Samarasekara, R.; Mahanama, K.R.R.; Hemalal, K.D.P. [2016]. In vitro tyrosinase, inhibitory activity of Sri Lankan medicinal plants. Presented at the ITI Biennial Research Symposium 2015, Industrial Technology Institute, November 16, Colombo.
Evaluating the tyrosinase elastase, hyaluronidase inhibitory and anti-oxidant properties of the ethanol extract of Camellia Sinensisas in refused tea; a potential cosmetic ingredient
Liyanaarchchi, G.D; Samarasekara, R.; Mahanama, K.R.R.; Hemalal, K.D.P. [2016]. Evaluating the tyrosinase elastase, hyaluronidase inhibitory and anti-oxidant properties of the ethanol extract of Camellia Sinensisas in refused tea; a potential cosmetic ingredient. Presented at the National Science Foundation Research Summit 2016 on Empowered by Research and Innovation. July 14-15, Colombo.
An investigation into levels of hazardous metals in enamel paints
Lakmini, M.C; Mahanama, K.R.R. [2016]. An investigation into levels of hazardous metals in enamel paints. Presented at the Conference on Environmental Challenges for Sustainable Development: Role of Chemists, Institute of Chemistry. August 18-19, Colombo.
Air quality concerns in Sri Lanka; Current understandings, lessons learned, amicable solutions and conceivable future catastrophe
Mahanama, K.R.R. [2016]. Air quality concerns in Sri Lanka; Current understandings, lessons learned, amicable solutions and conceivable future catastrophe. Presented at the Conference on Environmental Challenges for Sustainable Development: Role of Chemists, Institute of Chemistry. August 18-19, Colombo.
Quality characterization of commercial compost fertilizer – An alternative for the contamination risk of inorganic fertilizers
Wijesinghe, W.M.A.K.; Mahanama, K.R.R.; Mubarak, M.N.A.; Malavipathirana, S. [2015]. Quality characterization of commercial compost fertilizer – An alternative for the contamination risk of inorganic fertilizers. Presented at the Postgraduate Institute of Science Research Congress 2015, Postgraduate Institute of Science, University of Peradeniya, October 9-10, Peradeniya.
Wijegunawardena, G.M..; Mahanama, K.R.R. [2015]. Investigation of adulterated turmeric powder. Presented at the Annual Scientific Sessions 2015, Pharmaceutical Society of Sri Lanka, Sri Lanka Foundation Institute, August 1-2, Colombo.
In vitro tyrosinase, inhibitory activity of Sri Lankan medicinal plants
Liyanaarchchi, G.D; Samarasekara, R.; Mahanama, K.R.R.; Hemalal, K.D.P. [2015]. In vitro tyrosinase, inhibitory activity of Sri Lankan medicinal plants. Presented at the ITI Biennial Research Symposium 2015, Industrial Technology Institute, November 16 – 17, Colombo.
In vitro elastase, tyrosinase, inhibitory and antioxidant activity of Vetivera zizanioides
Liyanaarchchi, G.D; Samarasekara, R.; Mahanama, K.R.R.; Hemalal, K.D.P. [2015]. In vitro elastase, tyrosinase, inhibitory and antioxidant activity of Vetivera zizanioides. Presented at the 8th International Research Conference, General Sir John Kotalawala Defense University. August 27-28, Colombo.
In vitro elastase, tyrosinase, hyaluronidase inhibitory and antioxidant activities of Curcuma aromatia
Liyanaarchchi, G.D; Samarasekara, R.; Mahanama, K.R.R.; Hemalal, K.D.P. [2015]. In vitro elastase, tyrosinase, hyaluronidase inhibitory and antioxidant activities of Curcuma aromatia. Presented at the Annual Research Symposium 2015, University of Colombo, October 30, Colombo.
Development of a GC method to assess the adulteration of coconut oil by palm oil
Gamage, D.C.; Rajanayaka, R.M.G.B.; Mahanama, K.R.R.; [2015]. Development of a GC method to assess the adulteration of coconut oil by palm oil. Presented at the Annual Research Symposium 2015, University of Colombo, October 30, Colombo.
Development of a fluorimetric method for assessing paracetamol in pharmaceuticals
Perera, G.W.C.S.; Costa, M.D.P.de; Mahanama, K.R.R.; [2015]. Development of a fluorimetric method for assessing paracetamol in pharmaceuticals. Presented at the Annual Research Symposium 2015, University of Colombo, October 30, Colombo.
The study of the impact of agricultural runoff and improper waste disposal on stagnant water bodies in South Eastern Sri Lanka
Haniffa, M.A.C.M.; Senthilnithy, R.; Mahanama, K.R.R. [2014]. The study of the impact of agricultural runoff and improper waste disposal on stagnant water bodies in South Eastern Sri Lanka. Presented at the International Conference on Chemical Education, College of Chemical Sciences, Institute of Chemistry Ceylon. April 03 – 04, Colombo.
The impact of organic contamination on the dynamic equilibrium of dissolve oxygen in selected water bodies in South East Sri Lanka
Haniffa, M.A.C.M.; Senthilnithy, R.; Mahanama, K.R.R. [2014]. The impact of organic contamination on the dynamic equilibrium of dissolve oxygen in selected water bodies in South East Sri Lanka. Presented at the Eighteenth International Forestry and Environmental Symposium, Department of Forestry and Environmental Science, University of Sri Jayewardenepura. January 10 – 11, Thulhiriya.
Quantification of pesticide residues in black tea by GC- MS
Premathilaka, K.A.B.G.; Punyasiri, N.; Mahanama, K.R.R. [2014]. Quantification of pesticide residues in black tea by GC- MS. Presented at the Annual Research Symposium 2014, University of Colombo, November 21, Colombo.
Preliminary investigation of heavy metals exposure to different occupations
Rambukwella, R.M.H.K.; Waduge, V.A.; Mahanama, K.R.R. [2014]. Preliminary investigation of heavy metals exposure to different occupations. Presented at the Annual Research Symposium 2014, University of Colombo, November 21, Colombo.
Investigation of heavy metals in roadside dust particles and indoor depositions from selected locations in Gampaha District
Gurusinghe, A.U.; Mahanama, K.R.R. [2014]. Investigation of heavy metals in roadside dust particles and indoor depositions from selected locations in Gampaha District. Presented at the Annual Research Symposium 2014, University of Colombo, November 21, Colombo.
Impact of urban drainage on dynamic equilibrium of dissolved oxygen in water bodies of Sri Lanka
Haniffa, M.A.C.M.; Senthilnithy, R.; Mahanama, K.R.R. [2014]. Impact of urban drainage on dynamic equilibrium of dissolved oxygen in water bodies of Sri Lanka. Thirteenth international conference on urban drainage. September 07-12, Sarawak, Malaysia.