Performance of the newly constructed linear time-of flight plasma desorption mass spectrometer. C.K.G.Piyadasa, U.K.Abeywarna, T.R.Ariyaratne, R.V.Coorey. D.D.N.B.Daya and W.M.K.P. Wijeratne; Proc. Sri Lanka Assoc. Adv. Sci. E1-06 (1005) 341

Use of Z-Scores for the admission to Sri Lanka Universities, IPSL Proc. 18th Technical Session, Sri Lanka (2002). Back to top

Improved performance of a linear mode plasma desorption time-of-flight massspectrometer with an electrostatic wire guide , IPSL Proc. 18th Technical Sessions Sri Lanka (2002).

Scintillating properties of the amino acid of tryptophan, A. M. S. M. Nugegoda, T. R. Ariyaratne and D. D. N. B. Daya, SLAAS Proc. 58th Annual Sessions, Sri Lanka.

Ion and UV photon induced fluorescence from di-peptides, A. M. S. M. Nugegoda, T. R. Ariyaratne and D. D. N. B. Daya, SLAAS Proc. 58th Annual Sessions, Sri Lanka.

Plasma desorption mass spectrometry (PDMS) of plant extracts and its potential application in quantitative estimations, S.A. Dahanayaka, D.D.N. Barlo Daya, M.S.B. Mohottalage, G.A.S. Premakumara, and T.R. Ariyaratne, Abstracts, Annual Session, Faculty of Science, University of Colombo, Vol.1(2000)10

Plasma desorption mass spectrometry (PDMS) of crude extracts of selected medicinal plants, S.A. Dahanayaka, D.D.N. Barlo Daya, G.A.S. Premakumara and T.R. Ariyaratne, Proceedings of the 56th Annual Session of SLAAS (Part 1-Abstracts) E2(2000)238.

Instrumental development in time of flight technique, G. Piyadasa and T.R. Ariyaratne, Proceedings, 16th Technical Session, Inst. of Phyiscs, Sri Lanka, (March -2000)50

The role of site selection on localizing ground flashes in an automated lighting detection network, IPSL, Proc. 15th Technical Session, Sri Lanka (1999).

Some features of lightning ground flash activities observed in tropical thunderstorms, SLAAS, Proc. 55th Annual Session, Sri Lanka E1 (1999) 186

Plasma Desorption Mass Spectrometry (PDMS) of crude extracts of medicinal plants. Proceedings of the 55th Annual Sessions of Sri Lanka Association for theAdvancement of Science (SLAAS), E2 (1999) 224

on the accuracy of locating lightning ground flashes using two or more direction finding stations, SLAAS, Proc. 55th Annual Session, Sri Lanka E1 (1999) 187.

Characterisation of Fast Heavy Ion Induced photon emission from L-amino acids, Proceedings of the Annual Session of Sri Lanka Association for the advancement of Science(SLAAS), E1 (1999) 200.

Preliminary results of implementing an automated system in Sri Lanka to locate lighting ground flashes, SLAAS, Proc. 54th Annual Session, SriLanka (December 1998) 247.

Measurement of chalk-dust concentrations in class room environments. SLAAS, 54th Annual Session, Book of Abstracts, E1-13 (1998) 239.(30)

Application of plasma desorption mass spectrometry in the study of Schiff base metal complexes, SLAAS, 54th Annual Session, Book of Abstracts, E2-15 (1998) 286

An Investigation on the applicability of plasma desorption mass spectrometry in the study of natural products, D.D.N.B.Daya, U.K.Abeywarna, T.R.Ariyaratne, R.V.Cooray, C.K.G.Piyadasa, W.M.K.P.Wijayaratna, and M.S.B.Mohottalage Proc. Of SLAAS 53rd Annual Session Part. 1 (1997) E2-38,362.

Performance of new two-way ion production facility constructed for a plasma desorption mass spectrometer. D.D.N.B.Daya, U.K.Abeywarna, T.R.Ariyaratne, R.V.Cooray, C.K.G.Piyadasa and W.M.K.P.Wijararatne Proc. Sri Lanka. Assoc. Adv. Sci. E1-18 (1996) 171

Performance of a low cost second order electrostatic ion mirror for a time-of flight plasma desorption mass spectrometer. C.K.G.Piyadasa, T.R.Ariyaratne and W.M.K.P.Wijayaratne; Proc. Sri Lanka Assoc. Adv. Sci.E1-16 (1996) 170

Peptide sequence information by partial acid hydrolysis: an analysis by Matrix Assisted Laser Desorption/ Ionization. R.V.Coorey, P. Hakansson, R.A.Zubarev and T.R.Ariyaratne, Proc. Sri Lanka Assoc. Adv. Sci. E2-11 (1996) 184

Effect of residual gas pressure on the mass resolution and the molecular ion yield of a time-of-flight mass spectrometer. C.K.G.Piyadasa, T.R.Ariyaratne and W.M.K.P.Wijeratne; proc. Sri Lanka Assoc Adc Sci. E1-17, (1996) 171

Performance of an electrostatic lens (Einzel lens) as an ion manoeuvring device in a time-of-flight Massw spectrometer. C.K.G.Piadasa, U.K.Abeywarna, T.R.Ariyaratne, R.V.Coorey, D.D.N.B.Daya and W.M.K.P.Wijeratne; Proc. Sri Lanka Assoc. Adv. Sci. E1-07 (1995) 343

Resolution vs. ion yield study on the first Cf-252 plasma desorption mass spectrometer in Sri Lanka. D.D.N.B.Daya, U.K.Abeywrna, T.R.Aryaratne, and C.K.G.Piyadasa; Proc. Sri Lanka Assoc. adv. Sci. E-17 (1993) 196

252-Cf plasma desorption mass spectra of penicillins and the stabilization of molecular ions by cationisation. R.V.Coorey, U.K.Abeywarna, T.R.Ariyaratne, D.D.N.B.Daya and C.K.G.Piyadasa; Proc. Sri Lanka Assoc. Adc.Sci. E-16 (1993) 197

Investigation of Cooling effect in porous clay pots. J.P.Wansapura and T.R.Ariyaratne; proc.Sri Lanka Assoc. Adv. Sci. E1-07 (1991)129.

Applications of Californium – 252 Plasma Desorption Mass spectrometry to natural product chemistry. T.R. Ariyartne, D.D.N.B. Daya, G.M.U.W.Doloswala, J.A.D.C.Kumudinie and S. Widdiyasekara; Proc. Sri Lanka Assoc. Adc. Sci. E1 (1990) 17.

Measurement of insolation at Colombo, and investigation of its relation with humidity. W.M.K.P. Wijayaratne, K.T.L.De Silva and T.R.Ariyaratne; Proc. Sri Lakna Assoc. Adv. Sci. E44 (1986) 176

An investigation of the samples produced by the electrospray technique in molecular desorption mass spectrometry. D.U.J. Sonnadara and T.R. Ariyaratne; Proc. Sri Lanka Assoc. Adc.Sci. E10 (1986) 153

A molecular desorption time-of –flight mass spectrometer. T.R.Ariyaratne and s. Viddiyasekara; Proc. Sri Lanka. Asso.Adv.Sci. E9 (1986) 153.