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Dr. Emil Javier is recognized for his contributions in tropical agricultural research and crop production. His work finds applications in agronomy, plant breeding, seed production and management of tropical grasses and legumes, and in the utilization and grazing management of native Imperata grassland.

Sex: Male

Education:

• UPLB-CA, Los Baños, College, Laguna, BS Agriculture, 1964
• University of Illinois, USA, MS Agronomy, 1964
• Cornell University, Ithaca, New York, USA, PhD Plant Breeding, 1969

Field of Specialization:

Genetics, Agronomy, Plant Breeding

Read more: Emil Q. Javier

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Sex: Male
Education:

• Interventional Bronchoscopy (transbronchial needle aspiration biopsy), Hospital Torette, Ancona Italy, 2005
• Postgraduate Research Training, Kyoto School of Medicine, Kyoto University, 2004
• Fellowship Training Pulmonary Medicine, Veterans Memorial Medical Center, 2001
• Residency, Iloilo Mission Hospital, 1999
• Doctor of Medicine, West Visayas State University, 1994
• Bachelor of Science in Medical Technology, Southwestern University, 1989

Field of Specialization
Internal Medicine
Pulmonary Medicine
Interventional Bronchoscopy

Read more: Dr. Rollin Palermo Tabuena

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Sex: Male
Education:

• Doctor of Philosophy in Chemical Engineering, National Taiwan University of Science and Technology, 2018
• Bachelor of Science in Chemical Engineering, University of San Carlos, 2012

Field of Specialization
(Bio)Chemical Engineering: Cellular and Biomolecular Engineering

Researches:

Article title: Estimation of Biomass Availability in Panglao Island Using SENTINEL-2 MSI
Authors: W. N. Galang, I. D. F. Tabañag and M. E. Loretero
Publication title: Nature Environment and Pollution Technology 20(4), December 2021

Abstract:
Remote Sensing (RS) technology using SENTINEL-2 Multispectral Instrument (MSI) imagery was used in the estimation of residual biomass’ available energy potential. The estimation was done in Panglao Island, within the province of Bohol, Philippines. Estimation of biomass availability was processed using Geographical Information System (GIS) software incorporating the calculation of Normalized Difference Vegetation Index (NDVI) to extract information on land resources and its spatial distribution. It was found that the majority of vegetation cover on the island is in the form of perennial woody plants and coconut trees. Coconut production on the island of Panglao contributed 1.26% of the total cultivation area for the province based on processed captures of Sentinel-2 imagery. The residue concentration amounted to 2,865 tons of coconut residues based on the RPR method. This amount of residues can be translated to 52.92 TJ of theoretical energy potential. The result of this study may serve as a baseline for the locality to consider the utilization of agricultural residues such as coming from coconut trees to support the use of indigenous resources for energy generation.
Full text link https://tinyurl.com/4nmebsd6

Article title: GIS-Based Biomass Energy Sustainability Analysis Using Analytical Hierarchy Process: A Case Study in Medellin, Cebu
Authors: Wenyville Nabor Galang, Ian Dominic Tabañag, Michael Loretero
Publication title: International Journal of Renewable Energy Development 10(3):551-561, August 2021

Abstract:
The increasing demand for energy accounts for an alternative energy source. The search for biomass being abundant in an agricultural country is a suitable option to power a community. This paper used Analytical Hierarchy Process (AHP), which includes the organized hierarchy of various selection criteria, the assessment of the relative value of criteria, the comparison and an aggregate rating of the alternatives for each criterion. Specifically, the methodology used was the combination of multi-criteria and weighted-overlay analysis in a Geographical Information System (GIS) environment to provide a spatial overview of the sustainable location for sugarcane residues production in Medellin, Cebu. The study was able to identify Caputatan Sur and Canhabagat as sustainable locations for sugarcane residue production with respect to topography, cultivation area and accessibility. These locations represent 26% of the total cultivation area and average sugarcane production of the locality. The result of this study is an initial step in the support for the utilization of sugarcane residues to answer energy demand in remote areas and further promote the use of indigenous resources for energy generation.
Full text link https://tinyurl.com/2fekyedp

Article title: GIS-based site suitability analysis for biomass power plant in Bohol
Authors: Galang, W. N., Tabañag, I. D. F., and Loretero, M. E.
Publication title: International Journal of Agricultural Technology 17(5): 1711-1726, 2021

Abstract:
t Site suitability is an essential process in determining potential sites for power plant development with respect to some economic and environmental factors, such as road access, land surface features, crop distribution, and the population’s energy demand. In terms of the working population and land usage, agriculture remains to be Bohol’s largest sector. Agriculture covers more than half of the province's total land area. It was found that the municipalities of Dagohoy, San Miguel, Talibon, Trinidad and Ubay are abundant in coconuts, accounting for 38% of agricultural land and cultivating rice on about 32% of their agricultural area. The large croplands offer an abundant supply of agricultural residues. Along with an increasing number of people located some distance from croplands, electricity may be used efficiently. Furthermore, the municipality of Ubay was identified as the most suitable site for plant development through the integration of the GIS approach that allowed the analysis of the top rice and coconut areas in the province to determine the most suitable location that balanced economic and environmental criteria within the biomass supply.
Full text link https://tinyurl.com/2p89nfhr

Article title: RS-GIS Approach on Biomass Energy Potential Estimation of Sugarcane Residues in Medellin, Cebu.
Authors: Wenyville Nabor Galang, Ian Dominic Tabañag, Michael Loretero
Publication title: Applied Environmental Research 44(1), 2021

Abstract:
The need to use alternative energy sources is driven by the continued rise in fossil fuel price, increasing population and energy demand most particularly in a developing country like the Philippines. Biomass resources such as sugarcane residues provide alternative means to utilize its untapped potential for renewable energy. The use of remote sensing technology and geo-graphic information system enables detailed assessment on the quantification of its distribution, abundance and quality that will yield an effective and efficient use of its potential. Available energy potential measurement was conducted in the town of Medellin, part of Bogo-Medellin mill district, in the northern region of Cebu province. The calculation was assessed using the remote sensing technology of Light Detection and Ranging (LiDAR) data. This baseline valuation serves as primary input to obtain detailed resource information on specific cultivation land areas for sugarcane with the aid of GIS-based calculations. The calculation considered crop yield, residue-to-product ratio, cultivation area, moisture content and heating value of the crop for a detailed resource assessment. The results revealed the georeferenced location of specific sugarcane residue energy potential in the town of Medellin. The RS-GIS approach in biomass energy potential estimation provides a cost effective way to obtain the overview of spatial variation in agricultural bioresource of the locality.
Full text available upon request to the author

Article title: A Geospatial Approach to Energy Planning in Aid of Just Energy Transition in Small Island Communities in the Philippines
Authors: Khrisydel Rhea M. Supapo, Lorafe Lozano, Ian Dominic F. Tabañag, and Edward M. Querikiol
Publication title: Applied Sciences 11(24):11955, 2021

Abstract:
Providing electricity in off-grid island communities is a big challenge, exacerbated by the high cost of transporting fossil fuels and the non-viability of extending grid connections. Installing renewable energy systems in these areas is deemed a practical solution, especially supporting just energy transitions in these communities. However, the lack of information about resource availability and the most suitable locations hinders effective planning. This paper aims to determine the sufficiency of available renewable energy sources to meet the electricity demand of off-grid island communities. It is achieved through a three-phased approach: (1) an assessment stage; (2) geospatial analysis; and (3) technical potential estimation. The approach is applied in three island communities in Palawan, namely Araceli, Balabac, and Cuyo, where a diesel power plant currently provides electricity to its households and commercial/institutional establishments. The results indicate that the three islands can be powered by 3, 1.5, and 11 MW solar photovoltaic farms, respectively, which is sufficient to meet the projected demand until 2030. The approach can be helpful, especially for off-grid island communities, as they plan to provide universal electricity access using renewable energy sources.
Full text link https://tinyurl.com/496dcpj4

Article title: Effects of Aqueous Ethanol Concentration and Solid-to-Liquid Ratio in the Extraction of Organosolv Lignin from Mango (Mangifera indica L.) Seed Husk
Authors: Francis Dave C. Siacor, Ian Dominic F. Tabañag, Camila Flor Y. Lobarbio, Evelyn B. Taboada
Publication title: Science and Technology Asia 26(2), 2021

Abstract:
The Philippines is abundant with agricultural residues that are seemingly underutilized and undervalued. One of these residues is mango seed husks (MSH) generated from the mango processing industry. The current practice of discarding MSH to open dumpsites poses health and environmental concerns. This ushered in the need to address this issue. As lignocellulosic biomass, the major components of MSH are cellulose (⁓56%), hemicellulose (⁓18%), and lignin (⁓12%), which exhibit potential in several applications. Lignin, a natural biopolymer, has become an important compound in biorefineries. The exploitation of MSH to recover lignin necessitates several methods, such as the organosolv process using aqueous ethanol. In this study, lignin from MSH was recovered via the ethanol organosolv process. Specifically, the effects of ethanol concentration (50%, 65%, 80%) and solid-to-liquid ratio (SLR; 1:5, 1:7, 1:10) under fixed reaction time (4 hours) and temperature (95oC) on the recovery of lignin, in terms of %acid-soluble lignin (ASL), was investigated. The results show that higher lignin recovery is obtained at lower SLR and ethanol concentration. Response surface modeling revealed the combined effects of %ethanol and SLR on %ASL, in which linear effects imparted negative influence on %ASL, while quadratic and two-way interaction effects have a positive impact on the response variable. Furthermore, elucidation of lignin constituents in the extract, as well as its properties and biological activities, is seen to be an important undertaking to assess the appropriate application of the recovered lignin.
Full text link https://tinyurl.com/yc5s2zh3

Article title: Extraction of lipids from post-hydrolysis copra cake with hexane as solvent: Kinetic and equilibrium data
Authors: Kezia Gaile D. Te, Alchris Woo Go, Hanneh Jonna D. Wang, Reinell G. Guevarra, Luis K. Cabatingan, Ian Dominic F. Tabañag, Artik Elisa Angkawijaya, Yi-Hsu Ju
Publication title: Renewable Energy 158: 311-323, October 2020

Abstract:
Copra cake (CC), an agro-industrial residue produced in the manufacture of coconut oil, still has a considerable amount of lipids (∼15 %w/w). In order to valorize the residue, CC was subjected to dilute acid hydrolysis to produce a solid residue with higher lipid content of ∼25 %w/w. Considering the substantial amount of lipids available in the post-hydrolysis copra cake (PHCC), it is necessary to gather lipid extraction kinetics and equilibrium data for process and equipment design. The effects of solvent-to-solid ratio (4, 8, and 12 mL/g) and temperature (30, 40, and 50 °C) on the kinetics and equilibrium of lipid extraction from PHCC using n-hexane as solvent was investigated. Regardless of extraction temperature and SSR, equilibrium is reached in less than 10 min. To appropriately describe the lipid extraction system, various kinetic models were fitted, with the Modified-Peleg’s model best representing the extraction process (R2 ≥ 0.95). Extraction of lipids from PHCC required less amount of solvent to extract and recover the same amount of lipids present in CC. The fatty acids in the extracted lipids are primarily lauric acid. Fuel properties based on the fatty acid profile, as estimated using empirical models, were found to be suitable as biodiesel.
Full text available upon request to the author

Article title: Sugarcane processing by-products for bioethanol production in the Philippines: a retrospective assessment from 2007 to 2017 and future challenges
Authors: Alchris Woo Go, Ian Dominic F. Tabañag, Yi-Hsu Ju, Angelique T. Conag, Arjay S. Toledo, John Wilbert Orilla, Artik Elisa Angkawijaya
Publication title: Biofuels 13(5):1-11, 2020

Abstract:
Sugarcane has been tapped as a source of sugar and molasses for the production of bioethanol in the Philippines. The increasing demand in bioethanol due to the rising consumption of gasoline, the surplus sugar and molasses would not be able to meet future demands. In the harvesting and processing of sugarcane, residues like that of sugarcane leaves (SCL) and sugarcane bagasse (SCB) are generated. These residues are composed of sugar-based fibers, which may be utilized in producing bioethanol. Despite sugarcane residues being among the abundant crop residues generated, assessment on their potential for bioethanol production have been scarce. An initial assessment of the potentials of utilizing SCL and SCB produced in the Philippines and their contribution when utilized as raw material for bioethanol production is provided in this work. The geographical scenario of the Philippines was also taken into consideration. The limitations that could potentially be brought about by the competing use of available resource for bioenergy generation are also discussed. It is hoped that this work will provide a simple approach in providing or generating quantitative baseline information for consideration in future policies to avoid potential competition and emphasize on the need for appropriate allocation of available resources.
Full text available upon request to the author

Article title: Ethanol production from hemicellulose by a consortium of different genetically-modified sacharomyces cerevisiae
Authors: Ian Dominic F. Tabañag, I-Ming Chu, Yu-Hong Wei, Shen-Long Tsai
Publication title: Journal of the Taiwan Institute of Chemical Engineers 89:15-25, August 2018

Abstract:
In this study, Saccharomyces cerevisiae was engineered to degrade and utilize xylan, one of the major polysaccharide chains present in hemicellulose. Different hemicellulases from Trichoderma reesei, namely: endoxylanase, β-xylosidase, acetylxylan esterase, α-D-glucuronidase and α-L-arabinofuranosidase, were heterologously secreted by S. cerevisiae. A mixture experimental design was adapted to statistically describe the synergistic interactions between the hemicellulases and to determine the optimum formulations for the hydrolysis of xylan substrates. The hydrolytic activities of the hemicellulase mixtures were then improved by displaying the hemicellulases on the yeast surface as whole-cell biocatalysts. The engineered yeast strains displaying hemicellulases were further engineered to express xylose-utilization genes xylose isomerase (XI) and xylulokinase (XK) which enable its utilization of xylose as a sole carbon source. The resulting consortium was then able to grow and produce ethanol from different xylan substrates
Full text available upon request to the author

Article title: "Decorating outer membrane vesicles with organophosphorus hydrolase and cellulose binding domain for organophosphate pesticide degradation."
Authors: Fu-Hsiang Su, Ian Dominic Flormata Tabañag, Chih-Yun Wu, Shen-Long Tsai
Publication title: Chemical Engineering Journal 308:1-7, January 2017

Abstract:
Outer membrane vesicles (OMVs) are nanoscale spheres naturally released from Gram-negative bacteria. They contain a diverse array of proteins and lipopolysaccharide but do not replicate, which increases their safety profile and renders them attractive for environmental applications. Herein, an efficient and reusable biocatalyst for enhanced degradation of organophosphate pesticides was developed. Organophosphorus hydrolase (OPH) was tethered onto OMVs via a genetically fused ice nucleation protein (INP) to form OMV-based biocatalysts. To accomplish quick purification and easy recovery of the engineered OMV using cellulose, a cellulose binding module (CBM) was collaterally tethered on the OMV. The OPH-decorated OMVs exhibited an enhanced degradation rate when assayed with paraoxon as a substrate. In addition, the thermal stability and pH tolerance were also enhanced remarkably. Furthermore, the resulting biocatalysts could still retain more than 80% activity even after 15 cycles of recovery and reuse, demonstrating their potential use in bio-catalytic decontamination of organophosphate compounds.
Full text available upon request to the author

Paper Presentations:

Article title: Transforming yeast into whole-cell biocatalysts: looking at its role in establishing the bio-based economy.
Authors: Ian Dominic F. Tabañag
Conference title: 81st Philippine Institute of Chemical Engineers National Convention, Bacolod, Philippines, 2020

Article title: Addressing Our Country’s Need for Biofuels: Looking at Chemical Engineers Establishing a Bio-Based Economy in the Visayas Region.
Authors: Ian Dominic F. Tabañag
Conference title: 2nd Philippine Institute of Chemical Engineers Visayas Regional Conference, Ormoc City, Leyte, Philippines, 2019

Article title: Valorization of Lignin Derived from Spent Degumming Liquor for Solid Biofuels Production.
Authors: Ian Dominic F. Tabañag
Conference title: 14th Asian Congress on Biotechnology in Conjunction with the 2019 Biochemical Engineering Society of Taiwan (BEST) Conference and International Symposium on Biotechnology and Bioengineering, Taipei, Taiwan, 2019

Article title: Valorization of Lignin Derived fom Spent Degumming Liquor for Solid Biofuels Production.
Authors: Ian Dominic F. Tabañag
Conference title: 4th University Research Conference, University of San Carlos, Cebu City, Philippines.

Article title: Valorization of Sugarcane Residues for the Production of Bioethanol in the Philippine Context: A Retrospective Assessment from 2007-2017 and Future Challenges.
Authors: John Wilbert A. Orilla, Alchris Woo Go, Angelique T. Conag, Arjay S. Toledo, Yi-Hsu Ju, Ian Dominic F. Tabañag
Conference title: 2019 National Research Council of the Philippines (NRCP) Annual Scientific Conference, Manila, Philippines. 2019

Article title: Sugarcane processing by- products for bioethanol production in the Philippines: A retrospective assessment from 2007 to 2017 and future challenges.
Authors: John Wilbert A. Orilla, Alchris Woo Go, Angelique T. Conag, Arjay S. Toledo, Yi-Hsu Ju, Ian Dominic F. Tabañag
Conference title: 11th Regional Conference in Energy Engineering (RCEneE), Manila, Philippines.

Article title: Hydrolysis of Xylan Substrates by Engineered Saccharomyces cerevisiae Strains Expressing the Trichoderma reesei Hemicellulases on their Cell Surface.
Authors: Ian Dominic F. Tabañag and Shen-Long Tsai
Conference title: 2017 International Conference on Engineering and Information Technology, Cebu, Philippines. 2017

Article title: Expression and Secretion of the Trichoderma reesei Hemicellulase System by Saccharomyces cerevisiae for Xylan Hydrolysis.
Authors: Ian Dominic F. Tabañag, Yu-Hong Wei, I-Ming Chu, Shen-Long Tsai
Conference title: Biotechnology and Biochemical Engineering Society of Taiwan (BEST) 2016 Conference and International Symposium, National Central University, Taoyuan, Taiwan.

Article title: Engineering Saccharomyces cerevisiae as Whole-Cell Biocatalysts for Xylan Hydrolysis.
Authors: Ian Dominic F. Tabañag and Shen-Long Tsai
Conference title: The 2016 International Symposium for Young Chemical Engineers (2016 iSyCE), National Taiwan University of Science and Technology, Taipei, Taiwan.

Contact Details:

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Sex: Female
Education:

• Electromyography and Dystonia, University of Tokushima, 2004
• Post-Graduate Fellowship Training in Electromyography, University of Tokushima, 2003
• Fellowship in Neurology, University of the East - Ramon Magsaysay Memorial Hospital, 1999
• Residency, West Visayas State University Hospital, 1995
• Doctor of Medicine, West Visayas State University, 1991
• Bachelor of Science in Biology, University of San Agustin, 1987

Field of Specialization
Internal Medicine
Adult Neurologist
Electromyography and Nerve Conduction Studies

Read more: Dr. Ma. Daisy Pedroso-Tabuena