Dr. Pabeliña is one of the S&T Fellows in DOST-TAPI. She has five years of experience in patent research and analysis; two years in new product and equipment development and introduction, and nine years in scientific research, plasma technology, and material science. Dr. Pabeliñs research interests are Experimental Plasma Physics, Surface and Interface Science, Instrumentation Physics, Materials Science, Photovoltaics, Thin Film Deposition, and glass property-improvement.
Sex: Female
Education:
- Doctor of Philosophy in Physics, University of the Philippines Diliman, 2014
- Master of Science in Physics, University of the Philippines Diliman, 2010
- Bachelor of Science in in Applied Physics (Instrumentation), University of the Philippines Diliman, 2007
Field of Specialization:
Experimental Plasma Physics
Surface and Interface Science
Instrumentation Physics
Materials Science
Thin Film Deposition
Photovoltaics
Glass Property-Improvement
Researches:
Article title: Wettability of Plasma-treated fibers of Anahaw (Livistona rotundifolia), Buri (Corypha elata) and Pandan (Pandanus amaryllifolius)
Authors: Karel G. Pabeliña, Joseph P. Hortezuela, Ruth Mary P. Fallesgon, Henry J. Ramos
Publication title: Advanced Materials Research 894: 154-157, 2014
Abstract:
Anahaw (Livistona rotundifolia), Buri (Corypha elata) and Pandan (Pandanus amaryllifolius) leaves were plasma-treated using argon, oxygen and carbon tetrafluoride (CF4) gas under varying discharge currents (5 mA, 10 mA, 20 mA and 30 mA) for 15 minutes. The wettability properties of the plasma-treated samples were investigated using the sessile drop method to determine static contact angles on the surfaces. Based on the results, it was observed that increasing the discharge current in argon and oxygen plasma treatment was found to increase the wettability of the three samples while it decreased the wettability of Pandan and Buri samples for carbon tetrafluoride plasma.
Full text available upon request to the author
Article title: Effects of dielectric barrier discharge plasma modification on surface properties of tropical hardwoods at low pressure
Authors: MN Acda, EE Devera, RJ Cabangon, KG Pabelina & HJ Ramos
Publication title: Journal of Tropical Forest Science 24(3): 416–425, 2012
Abstract:
The study investigated the use of dielectric barrier discharge (DBD) for surface modification of Shorea contorta (white lauan), Gmelina arborea (yemane) and Acacia mangium. Wood specimens were exposed to oxygen plasma at various intensities ranging from 5.8 to 46.5 kW-min m-2. Surface free energy was calculated based on contact angle measurements to determine thermodynamic changes on plasma modified wood. Surface characteristics were evaluated using attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy and atomic force microscopy (AFM). Results of the study showed that plasma modification resulted in significant increase in surface free energy of the three wood species investigated. ATR-FTIR indicated that plasma-treated wood had higher surface polarity compared with untreated controls. AFM 3D image showed that oxygen plasma was capable of cleaning and etching wood surface resulting in the degradation of primary and secondary cell walls.
Full text link https://tinyurl.com/mrxrkhct
Article title: Plasma impregnation of wood with fire retardants
Authors: Karel G. Pabeliña, Carmencita O. Lumban, Henry J. Ramos
Publication title: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 272: 365-369, 2012
Abstract:
The efficacy of chemical and plasma treatments with phosphate and boric compounds, and nitrogen as flame retardants on wood are compared in this study. The chemical treatment involved the conventional method of spraying the solution over the wood surface at atmospheric condition and chemical vapor deposition in a vacuum chamber. The plasma treatment utilized a dielectric barrier discharge ionizing and decomposing the flame retardants into innocuous simple compounds. Wood samples are immersed in either phosphoric acid, boric acid, hydrogen or nitrogen plasmas or a plasma admixture of two or three compounds at various concentrations and impregnated by the ionized chemical reactants. Chemical changes on the wood samples were analyzed by Fourier transform infrared spectroscopy (FTIR) while the thermal changes through thermo gravimetric analysis (TGA). Plasma-treated samples exhibit superior thermal stability and fire retardant properties in terms of highest onset temperature, temperature of maximum pyrolysis, highest residual char percentage and comparably low total percentage weight loss.
Full text available upon request to the author
Article title: Comparative Study on the Use of Different Metal Electrodes in Low-Pressure Glow Discharge Plasma Sterilization
Authors: Joanna Abigael Daseco, Karel G. Pabelina, Ma. Auxilia T. Siringan, Henry J. Ramos
Publication title: Plasma Medicine
Abstract:
The sterilizing efficacy of low-pressure direct current glow discharge hydrogen peroxide (H2O2) plasma generated by a planar parallel plate plasma source using the plasma enhanced chemical vapor deposition (PECVD) facility was tested. This study compares the effect of using different metals (copper, stainless steel, and aluminum) as electrodes in plasma sterilization of stainless steel dishes. Test samples were exposed to H2O2 plasma under different sets of discharge currents and exposure times. Bacillus subtilis was used as the test organism and microbial analysis was made by means of the standard plate count method of serial dilution and pour plating. Evaluation of microbial death was done using survival curves, percent reduction, and decimal reduction value. Results showed that sterilization using copper electrodes exhibited the highest decimal reduction value (D-value) and percent reduction among the three electrodes. However, statistical analysis using multivariate analysis of variance (MANOVA) at 0.05 significance level assessed that the type of electrode material is not a significant factor in the H2O2 plasma sterilization of Bacillus subtilis cells.
Full text link available upon request to the author
Papers Presented:
Article title: Review of plasma treatments of tropical hardwood in vacuum and atmospheric pressure
Authors: L.M.D. Rosario, R.D. Manalo, K.G. Pabeliňa, J.R.Y. Uy, H.J. Ramos, and R.B. Tumlos
Publication title: Proceedings of the 1st International Symposium of the Vacuum Society of the Philippines, Ateneo de Manila University, January 14-15, 2016.
Article title: Fast low-energy plasma processing of a tropical hardwood for enhanced surface properties
Authors: L.M.D. Rosario, R.D. Manalo, J.R.Y. Uy, K.G. Pabeliňa, H.J. Ramos, and R.B. Tumlos
Publication title: Proceedings of the 36th International Symposium on Dry Process, Yokohama, Japan, 27-28 November 2014
Article title: Enhanced surface energy of a tropical hardwood using a cold atmospheric plasma
Authors: L.M.D. Rosario, R.D. Manalo, J.R.Y. Uy, K.G. Pabeliňa, H.J. Ramos, and R.B. Tumlos
Publication title: Proceedings of the 31th Samahang Pisika ng Pilipinas PhysicsCongress, ISSN 1656-2666 Vol.11, National Institute of Physics, October 17-20, 2014
Article title: Development of ECR Microwave Antenna for the production of streaming atmospheric-pressure plasma
Authors: C.F.P. Romero, M. Wada, K.G. Pabelina, L.M.D. Rosario, M.C.C. Lacdan, H.V. Lee, Jr., J.A.S. Ting, H.J. Ramos, M.A.T. Siringan, and R.B. Tumlos,
Publication title: Proceedings of the 5th International Conference on Plasma Medicine, Narra, Japan, 18-23 May 2014.
Article title: Effect of oxygen plasma treatment on the UV absorbance of electrospun polylactic acid-cellulose acetate fiber mats
Authors: J.A. Daseco, K. Pabeliña, J. Monserate, and H.J. Ramos
Publication title: Proceedings of the 31th Samahang Pisika ng Pilipinas Physics Congress, ISSN 1656-2666 Vol.10, University of San Carlos, Cebu City, October 23-25, 2013
Article title: Sterilization using atmospheric and dielectric barrier discharge plasmas
Authors: H. Ramos, C.F. Romero, J.K. Soriano, J.A. Daseco, K. Pabeliña, L.M. Rosario, R. Tumlos, and M.A. Siringan
Publication title: Proceedings of NSRI@30, UP Diliman, 25-27 March 2013
Article title: Hydrophilic and hydrophobic glass by direct current glow
discharge low pressure plasma treatment
Authors: J.A. Daseco, K. Pabeliña, H. Ramos, A. Somintac
Publication title: Proceedings of the 30th Samahang Pisika ng Pilipinas Physics Congress, ISSN 1656-2666 Vol.9, De La Salle Health Sciences Institute, Dasmarinas City, Cavite, Philippines October 22-24, 2012
Article title: Bacterial inactivation using atmospheric-pressure plasma jet
Authors: C.F.P. Romero, K.G. Pabeliña, L.M.D. Rosario, M.C.C. Lacdan, H.V. Lee, Jr., J.A.S. Ting, H.J. Ramos, M.A.T. Siringan, and R.B. Tumlos
Publication title: Proceedings of the 11th Asia Pacific Conference on Plasma Science and Technology (APCPST), Kyoto, Japan, 2-5 October 2012.
Article title: Analysis of Glow Discharge Argon and Oxygen Plasma-Treated Philippine Coconut Fibers
Authors: J.R.Guhit, K.G. Pabeliña, R.B. Tumlos, H.J. Ramos
Publication title: Proceedings of the 11thAsia Pacific Conference on Plasma Science and Technology (APCPST), Kyoto, Japan, 2-5 October 2012.
Article title: Wettability and Bacterial Retention property of plasma Treated polyethylene terephthalate
Authors: K.G. Pabelina, C.P. Romero, J.Y. Daseco, H.J. Ramos
Publication title: Proceedings of the 21st International Toki Conference (ITC21): Integration of Fusion Science and Technology for Steady State Operation, Ceratopia, Toki, Gifu, Japan, November 28 - December 1, 2011.
Article title: Effects of Argon and Water Plasma Treatments on Philippine Coconut Fibers
Authors: J.R.M. Guhit, K.G. Pabelina, H.J. Ramos
Publication title: Proceedings of the 21st International Toki Conference (ITC21): Integration of Fusion Science and Technology for Steady State Operation, Ceratopia, Toki, Gifu, Japan, November 28 - December 1, 2011.
Article title: Optical emission spectroscopy studies on the efficacy of nitrogen addition to boric acid plasma as flame retardant on wood
Authors: K. Pabeliña, J. Guhit, C. Romero, J. Daseco, J. de Vero, and H. Ramos
Publication title: Proceedings of the 28th Samahang Pisika ng Pilipinas Physics Congress, ISSN 1656-2666 Vol.7, Meralco Management and Leadership Development Center, Antipolo City, October 25-27, 2010.
Article title: Effects of chemical and plasma treatment on the flame retardance of plywood
Authors: C. Lumban, K. Pabeliña, and H. Ramos
Publication title: Proceedings of the 28th Samahang Pisika ng Pilipinas Physics Congress,ISSN 1656-2666 Vol.7, Meralco Management and Leadership Development Center, Antipolo City, October 25-27, 2010.
Article title: Optimization of magnetron sputtering in a magnetized sheet plasma for the deposition of multilayered Ti/TiN films
Authors: L.M.D. Rosario, K.G. Pabeliña, R.P.B. Viloan, R.B. Tumlos, H.J. Ramos
Publication title: Proceedings of the 11th Asia Pacific Physics Conference, Shanghai Everbright Convention and Exhibition Center International Hotel, Shanghai, China, November 14-18, 2010.
Article title: Optical emission spectroscopy studies on the efficacy of nitrogen addition to boric acid as flame retardant on wood
Authors: K. Pabeliña, J. R. Guhit, C. F. Romero, J. A. Daseco and H. J. Ramos
Publication title: Proceedings of the 11th Asia Pacific Physics Conference, Shanghai Everbright Convention and Exhibition Center International Hotel, Shanghai, China, November 14-18, 2010.
Article title: Thermal degradation characteristics of flame-retarded wood
Authors: K. Pabeliña, C. Lumban, and H. Ramos
Publication title: Proceedings of the 3rd ASEAN-India Thermal Spray Project Cum Scientific Forum, Hotel Dominique, Tagaytay City, Philippines October 18-20, 2010
Article title: Plasma Impregnation of Wood with Fire Retardants
Authors: K. Pabeliña, C. Lumban and H. Ramos
Publication title: Proceedings of the17th International Conference on Ion Beam Modification of Materials (IBMM), Marché Bonsecours, Vieux Montréal (Québec), Canada, August 22-27, 2010.
Article title: FTIR analysis of phosphoric acid plasma-treated plywood
Authors: C. Lumban, K. Pabeliña, G. Blantocas and H. Ramos
Publication title: Proceedings of the 27th Samahang Pisika ng Pilipinas Physics Congress,ISSN 1656-2666 Vol. 6, DAP, Tagaytay City, Oct. 28-30, 2009.
Article title: Antimicrobial properties of titanium copper nitride produced by a magnetized sheet plasma source
Authors: K. Pabeliña, M. Villamayor, M. Siringan, H. Ramos
Publication title: Proceedings of the 26th Samahang Pisika ng Pilipinas Physics Congress,ISSN 1656-2666 Vol. 5,University of the Philippines, Baguio City, Oct. 22-24, 2008.
Article title: Surface modification of ophthalmic CR-39 polymer lenses by low energy hydrogen ion shower (LEHIS) treatment
Authors: A. A. Lim, K. Pabeliña, G. Blantocas, H. Ramos
Publication title: Proceedings of the 26th Samahang Pisika ng Pilipinas Physics Congress,ISSN 1656-2666 Vol. 5,University of the Philippines, Baguio City, Oct. 22-24, 2008.
Article title: Sterilization of a packaged material using low pressure glow discharge plasma
Authors: K. Pabeliña, M. A. T. Siringan, and H. J. Ramos
Publication title: Proceedings of the 25th Samahang Pisika ng Pilipinas Physics Congress,ISSN 1656-2666 Vol. 4, University of the Philippines, Los Baños, Laguna, October 24-26, 2007.
Contact details: This email address is being protected from spambots. You need JavaScript enabled to view it.