Amir Mor-Mussery | Ecology | Best Researcher Award

Dr. Amir Mor-Mussery | Ecology | Best Researcher Award

Dr, Agriculture Research Organization, Volcani, Israel

With a Ph.D. from Ben Gurion University in Environmental Sciences, Geoinformatics, and Urban Planning Sciences, specializing in agroecosystems in arid areas, I bring extensive expertise in spatial analyses using ArcGIS® and Python. My experience includes managing ecological projects and teaching roles at the Faculty of Agriculture, focusing on digital agriculture and soil enhancement practices. I’ve led research on satellite imaging and water irrigation systems, contributing significantly to environmental and agricultural sciences. Fluent in English and Hebrew, I’ve also conducted lectures internationally. Skilled in software like ArcGIS®, JMP®, and ImagJ®, I’m committed to advancing sustainable agriculture through innovative research and practical application.

Profile

Google Scholar

 

Academic Excellence and Ecological Leadership 🌱🌍

I am distinguished by my extensive expertise in agroecology and environmental sciences, cultivated through a robust academic journey culminating in a Ph.D. from Ben Gurion University. My doctoral research delved into the evolution of agroecosystems in arid loess areas, highlighting my commitment to sustainable land management (doi:10.13140/RG.2.2.21802.98240). Complementing this, my M.Sc. in Agriculture focused on geostatistical methods and their impact on crop physiology, particularly in cherry tomatoes. 🍅

 Professional Development 📚✨

My educational journey includes foundational degrees in Agriculture, specialized training in water management, organic breeding, and small ruminants. These have fortified my role as a leader in environmental projects, such as managing ecological processes using satellite imaging and guiding community-centered rehabilitation initiatives. 🌱

Technological Proficiency 🛠️🔍

I bring practical experience as a lecturer and project manager, fostering digital agriculture advancements and soil enhancement practices. Proficient in ArcGIS® and Python for spatial analysis, I’ve contributed significantly to agricultural research and educational initiatives worldwide. 🌍

Academic Impact 📊🎓

As a free lecturer and researcher, I advocate for sustainable practices and innovative solutions, leveraging technologies like GS+®, JMP®, and ImagJ®. Fluent in Hebrew and English, I am dedicated to bridging research with practical application, driving environmental stewardship and academic excellence. 🌱📈

📚 Publications:

Detecting changes in biomass productivity in a different land management regimes in drylands using satellite‐derived vegetation index

CITED BY 51

Rehabilitating degraded drylands by creating woodland islets: Assessing long-term effects on aboveground productivity and soil fertility

CITED BY 29

The effect of planting techniques on arid ecosystems in the northern Negev

CITED BY 27

The effects of long time conservation of heavily grazed shrubland: A case study in the Northern Negev, Israel

CITED BY 23

Using Landsat satellites to assess the impact of check dams built across erosive gullies on vegetation rehabilitation

CITED BY 18

The effects of gully erosion on the ecology of arid loessial agro-ecosystems, the northern Negev, Israel

CITED BY 17

Modeling the optimal grazing regime of Acacia victoriae silvopasture in the Northern Negev, Israel

CITED BY 16

Effects of grazing control on ecosystem recovery, biological productivity gains, and soil carbon sequestration in long‐term degraded loess farmlands in the Northern Negev, Israel

CITED BY 12

Contrasting effects of two Acacia species on understorey growth in a drylands environment: interplay of canopy shading and litter interference

CITED BY 12

Dr. Sa’ad Ibrahim – Planetary Sciences – Best Researcher Award

Dr. Sa’ad Ibrahim - Planetary Sciences - Best Researcher Award

UNIVERSITY OF LEICESTER - United Kingdom

Professional Profiles

Google Scholar

Early Academic Pursuits

Sa’ad Ibrahim’s journey in academia began with his foundational studies in Geography and Biology. Born and raised in Nigeria, Ibrahim pursued his early education at Kebbi State College of Education, Argungu, where he obtained a National Certificate in Education (NCE) with upper credit in Biology and Geography from 2000 to 2002. His passion for Geography was evident early on, leading him to further his studies at Usmanu Danfodiyo University, Sokoto, where he earned a Bachelor of Science degree in Geography, graduating with a second class upper division in 2007. His academic excellence continued to shine through as he moved to the United Kingdom for advanced studies, obtaining a Master’s degree in Geographical Information Systems (GIS) with Merit from the University of Leicester in 2012.

Professional Endeavors

Following his academic achievements, Sa’ad Ibrahim embarked on a professional journey that has seen him make significant contributions to the field of environmental science and geography. His dedication to his discipline led him to pursue a Ph.D. in Geography at the School of Geology, Geography, and Environment, University of Leicester, which he completed between 2014 and 2018. His doctoral research provided him with a deep understanding of environmental systems and the application of GIS in addressing complex geographical challenges.

Currently, Ibrahim is affiliated with the Institute for Environmental Futures at Space Park, University of Leicester, United Kingdom. His role involves both research and teaching, where he applies his extensive knowledge of GIS and environmental geography to advance the field. His expertise in GIS is particularly valuable, given the increasing importance of spatial analysis and mapping in environmental research and policy-making.

Contributions and Research Focus On Planetary Sciences

Sa’ad Ibrahim's research has been pivotal in addressing key environmental issues through the use of advanced geographical and spatial analysis tools. His primary research interests lie in the integration of Geographical Information Systems (GIS) with environmental science to solve real-world problems. His doctoral research focused on the application of GIS in environmental monitoring and management, which has significant implications for sustainable development and environmental conservation.

One of his notable contributions is his work on environmental monitoring systems that utilize GIS to track changes in land use, climate, and natural resources. This research is crucial for developing strategies to mitigate the impacts of climate change and to promote sustainable land use practices. Ibrahim’s work also extends to urban geography, where he investigates the spatial dynamics of urban growth and its environmental impacts, providing insights that are essential for urban planning and policy development.

Accolades and Recognition In Planetary Sciences

Sa’ad Ibrahim's contributions to geography and environmental science have been recognized both nationally and internationally. His academic excellence and impactful research have earned him various accolades, reflecting his standing in the academic community. His scholarly work has been published in numerous reputable journals, showcasing his findings on GIS applications in environmental science and urban geography.

In addition to his research accolades, Ibrahim has been an active participant in various international conferences and workshops, where he has presented his work and collaborated with other experts in the field. His role as a thought leader in environmental geography has been further solidified through his involvement in various research projects and his contributions to the academic curriculum at the University of Leicester.

Impact and Influence

Sa’ad Ibrahim’s work has had a profound impact on the field of geography, particularly in the areas of environmental monitoring and urban geography. His innovative use of GIS has provided new tools and methodologies for researchers and practitioners working to address environmental challenges. His research has influenced policy-making, particularly in the areas of sustainable development and urban planning, where his insights have helped shape strategies for managing environmental resources and urban growth.

Ibrahim’s influence extends beyond academia, as his work is also utilized by governmental and non-governmental organizations involved in environmental conservation and urban development. His ability to bridge the gap between academic research and practical application makes his contributions invaluable to both the scientific community and society at large.

Legacy and Future Contributions For Planetary Sciences

Looking ahead, Sa’ad Ibrahim’s legacy in environmental geography is poised to grow as he continues to push the boundaries of research in GIS and its applications. His future contributions are expected to further enhance our understanding of environmental systems and the role of technology in monitoring and managing these systems. With ongoing advancements in GIS technology, Ibrahim is well-positioned to lead new research initiatives that address emerging environmental challenges.

His commitment to education and mentorship ensures that his knowledge and expertise will continue to inspire and guide future generations of geographers and environmental scientists. As he continues his work at the Institute for Environmental Futures, Sa’ad Ibrahim remains a pivotal figure in the quest for sustainable environmental solutions and innovative geographical research.

Notable Publications

Quantitative datasets reveal marked gender disparities in Earth Sciences faculty rank in Africa 2023

Spatial interaction between weather and socio-demographic factor as influencing variables for COVID-19 spread in Iraq 2023

Improving land use/cover classification accuracy from random forest feature importance selection based on synergistic use of sentinel data and digital elevation model in … 2022

Cited by

All Since 2019
Citations 339 321
h-index 8 8
i10-index 6 6

Arunachalasivamani Ponnusamy – Food Science Award – Best Researcher Award

Arunachalasivamani Ponnusamy - Food Science Award - Best Researcher Award

Prince Of Songkla University - Thailand

Professional Profiles

Early Academic Pursuits

Arunachalasivamani Ponnusamy's academic journey began with a bachelor's degree in Fisheries Science, laying the foundation for his expertise in seafood science. He furthered his education with a master's degree in Fish Processing Technology, honing his skills in food technology and processing. His pursuit of knowledge led him to embark on a Doctorate in Food Science and Technology at Prince of Songkla University in Thailand, where he demonstrated his capacity as a quick learner with exceptional technical skills and a keen interest in scientific learning and problem-solving.

Professional Endeavors

Currently affiliated with the International Center of Excellence in Seafood Science and Innovation at Prince of Songkla University, Arunachalasivamani Ponnusamy is engaged in cutting-edge research in the field of food science. His research endeavors focus on exploring innovative uses of agro-wastes and seafood wastes to develop carbon dots with diverse applications. Additionally, he is involved in the development of multifunctional films for active and intelligent food packaging, integrating materials such as chitosan-gelatin nanofibers, carbon dots, and anthocyanins from Clitoria ternatea. Furthermore, his work extends to the formation of functional nanofibrous electrospun blisters containing EGCG for packaging shrimp oil capsules, showcasing his interdisciplinary approach and dedication to advancing food packaging technology.

Contributions and Research Focus On Food Science Award

Ponnusamy's research focuses on harnessing natural resources to develop sustainable and innovative solutions in food science and technology. By utilizing agro-wastes and seafood wastes to produce carbon dots and incorporating them into various food packaging materials, he addresses critical issues such as food safety, preservation, and sustainability. His work not only explores the properties and applications of novel materials but also considers their potential toxicity and antimicrobial properties, ensuring their suitability for food-related applications.

Accolades and Recognition In Food Science Award

While specific accolades and recognition are not mentioned, Ponnusamy's involvement in cutting-edge research at an internationally recognized institution like Prince of Songkla University signifies his standing in the scientific community. His research contributions in the field of seafood science and food technology likely garner recognition from peers and colleagues, underscoring his dedication and expertise in his field. Celebrating Arunachalasivamani Ponnusamy's groundbreaking achievements with the prestigious Food Science Award, acknowledging his exceptional contributions to the field's advancement and innovation.

Impact and Influence

Ponnusamy's research has the potential to make a significant impact on the food industry by introducing sustainable and innovative solutions for food packaging and preservation. By developing materials from agro-wastes and seafood wastes, he not only addresses environmental concerns but also contributes to enhancing food safety and shelf-life. His work may influence industry practices and regulations, promoting the adoption of eco-friendly packaging materials and sustainable production processes.

Legacy and Future Contributions For Food Science Award

As Ponnusamy continues his research endeavors, his legacy in the field of food science and technology is expected to grow. His innovative approaches to utilizing natural resources and developing sustainable packaging materials have the potential to revolutionize the food industry. Furthermore, his interdisciplinary research bridges the gap between food science, materials science, and environmental sustainability, paving the way for future advancements in food packaging technology. Through his dedication to scientific inquiry and problem-solving, Ponnusamy is poised to leave a lasting impact on the field and contribute to a more sustainable and resilient food system.

Notable Publications

Chitosan silver nanoparticle inspired seaweed (Gracilaria crassa) biodegradable films for seafood packaging  2021

Bilayer Polylactic Acid and Chitosan/Gelatin Film Containing Epigallocatechin Gallate Prepared through Solvent Casting and Electrospinning: Properties, Bioactivities and Release Kinetics

Ultrasound treated fish myofibrillar protein: Physicochemical properties and its stabilizing effect on shrimp oil-in-water emulsion 2023

Dr. Pankaj Kumar Roy – Environmental Science Award – Best Researcher Award

Dr. Pankaj Kumar Roy - Environmental Science Award - Best Researcher Award

Jadavpur University - India

Professional Profiles

Early Academic Pursuits

Dr. Pankaj Kumar Roy's academic journey began with a Bachelor of Civil Engineering from NIT Silchar, Assam, followed by a Master of Civil Engineering from Jadavpur University. His academic pursuits culminated in a Ph.D. in Engineering, specializing in water resources engineering, from the same university. These formative years laid the foundation for his future endeavors in the field.

Professional Endeavors

With over two decades of experience in teaching, research, and administrative roles, Dr. Roy's professional journey is extensive and diverse. He has served as the Director of the School of Water Resources Engineering and the former Dean of the Faculty Council of Interdisciplinary Studies, Law, and Management at Jadavpur University, Kolkata. Additionally, his industrial experience spanning two years adds practical insight to his academic expertise.

The Environmental Science Award recognizes outstanding contributions to environmental research and sustainability efforts. Honoring innovators in fields like water management, renewable energy, and conservation, this prestigious accolade celebrates individuals making significant strides towards a greener, more sustainable future. Environmental Science Award winners epitomize excellence in environmental stewardship and scientific advancement.

Contributions and Research Focus On Environmental Science Award

Dr. Roy's contributions to the field of water resources engineering are multifaceted. With over 35 awarded Ph.D. scholars and more than 150 awarded PG scholars under his guidance, he has played a pivotal role in shaping the next generation of researchers in this domain. His research portfolio includes over 25 completed projects and ongoing projects, focusing on critical issues related to water resources management, hydrology, and environmental engineering. His extensive publication record, comprising over 130 international and 60 national publications, reflects the depth and breadth of his research endeavors.

Accolades and Recognition In Environmental Science Award

Dr. Roy's contributions have been widely recognized and celebrated in the academic community. He has authored more than 15 books, monographs, and edited volumes, further solidifying his reputation as a thought leader in the field. As an invited speaker, he has delivered lectures at numerous conferences and seminars, showcasing his expertise and insights. His active involvement in professional societies and bodies, with membership in 15 such organizations, underscores his standing as a respected figure in the field.

Impact and Influence

Dr. Roy's research and academic leadership have had a significant impact on the field of water resources engineering. Through his research projects, publications, and scholarly activities, he has contributed valuable insights and solutions to pressing challenges in water management and environmental sustainability. His role as a mentor and educator has empowered numerous scholars to make meaningful contributions to the field, thereby extending his influence beyond his individual research endeavors.

Legacy and Future Contributions For Environmental Science Award

As Dr. Roy continues to advance in his career, his legacy in the field of water resources engineering is assured. His dedication to research, teaching, and mentoring has left an indelible mark on the academic community, inspiring future generations of scholars to pursue excellence in this important discipline. Looking ahead, Dr. Roy's continued contributions are poised to address emerging challenges in water resources management and shape the future trajectory of the field, further cementing his legacy as a leading figure in water resources engineering.

Notable Publications

Evaluation of groundwater quality by adopting a multivariate statistical approach and indexing of water quality in Sagar Island, West Bengal, India 2024

Groundwater vulnerability assessment for drinking water suitability using Fuzzy Shannon Entropy model in a semi-arid river basin 2023

Enhanced fluoride removal from groundwater using red and white kaolinite lithomarge to develop a low cost eco-friendly defluoridation unit in rural areas of Shilabati river basin, West Bengal 2023

Lanthanum oxide–graphene oxide coated functionalized pyrolyzed biomass from sawdust and its application for dye removal present in solution 2023

Neelima Singh–Photovoltaics- Best Researcher Award –Winner

Congratulations to Neelima Singh–Photovoltaics- Best Researcher  – Award Winner 2023

Neelima Singh-Photovoltaics

professional profile:

Early Academic Pursuits:

Neelima Singh pursued her early academic endeavors at National Institute of Technology, Sikkim, where she demonstrated exceptional dedication and aptitude in her studies. Her academic journey laid the foundation for her future achievements and contributions in the field of technology.

Professional Endeavors:

Building on her academic success, Neelima Singh embarked on a journey of professional endeavors. Her commitment to excellence and passion for technology led her to make significant contributions in her chosen field. Her professional experiences reflect a strong work ethic and a determination to make a positive impact.

Contributions and Research Focus:

Neelima Singh's contributions to the field of technology are marked by a focused research agenda. She has demonstrated a keen interest in areas such as Photovoltaics, making noteworthy contributions that have advanced the understanding and application of technology in her domain.

Accolades and Recognition:

Neelima Singh's achievements have not gone unnoticed, as she has garnered accolades and recognition for her outstanding contributions. These acknowledgments serve as a testament to her dedication and expertise in her field, further establishing her as a notable figure in the technological landscape.

Impact and Influence:

Neelima Singh's work has had a tangible impact on the technological community. Her research and initiatives have influenced the way we perceive and utilize technology in Photovoltaics. Her ability to create positive change through her work sets her apart as a thought leader in her field.

Legacy and Future Contributions:

Neelima Singh's legacy is characterized by a commitment to pushing the boundaries of technological innovation. As she continues to make strides in her career, it is evident that her contributions will have a lasting impact on the field. Her dedication to advancing technology and inspiring future generations positions her as a trailblazer with a promising legacy.

Future Contributions Highlight:

Looking ahead, Neelima Singh remains poised to make even greater contributions to the technological landscape. Her vision for the future involves Photovoltaics, indicating a continued commitment to advancing technology for the betterment of society.

Notable Publication:

Numerical Analysis of Lead-free Methyl Ammonium Tin Halide Perovskite Solar Cell 130033, 2020

Computational analysis of cesium based inorganic perovskite solar cell using SCAPS 1D. 2265, 030672 (2020)

Performance evaluation of lead-free double-perovskite solar cell. April 2021, 110964 (49)

Study the Effect of Band Offsets on the Performance of Lead-Free Double Perovskite Solar Cell.  March 2022, 112112 (10)

Highly efficient lead-free ethyl ammonium substituted perovskite solar cell simulated using SCAPS 1D.  March 2024, 111834 (43)

Ayyadurai Saravanakumar- Bioenergy- Best Researcher – Award Winner 2023🏆

Congratulations to Ayyadurai Saravanakumar- Bioenergy- Best Researcher  - Award Winner 2023🏆

Dr. Ayyadurai Saravanakumar:

Dr. Ayyadurai Saravanakumar, born on May 6, 1977, began his academic journey with a Bachelor's degree in Physics from Jayaraj Chelladurai College, Madurai Kamaraj Universityacademic achievements culminated in a Ph.D. in Energy from Madurai Kamaraj University in 2008. His doctoral research was supported by the National Renewable Energy Fellowship program, spanning from Junior Research Fellowship (JRF) from 2000 to 2003 to Senior Research Fellowship (SRF) from 2003 to 2006. This program was sponsored by the Ministry of New and Renewable Energy, Government of India, through the Centre for Energy Studies at IIT Delhi

professional profile:

Early Academic Pursuits

Dr. Ayyadurai Saravanakumar embarked on his academic journey by obtaining a Ph.D. in Energy in 2008 from Madurai Kamaraj University. His doctoral research was sponsored by the National Renewable Energy Fellowship program from 2000 to 2006, a commendable tenure that laid the foundation for his expertise in bio-energy.

Professional Endeavors

With a total working experience of 20 years and 10 months, Dr. Saravanakumar has a diverse professional background. His recent role is as an Assistant Professor at the Centre for Research in Environment, Sustainability, Advocacy, and Climate Change (REACH) at SRM Institute of Science and Technology, where he has been contributing since August 2020.

Contributions and Research Focus

Dr. Saravanakumar's extensive research experience spans various organizations and roles, including research positions in Biomass Energy R&D, Renewable Energy R&D, and Bio-Energy R&D. His research focuses on Biomass Gasification Technologies, Biomass to Charcoal conversion technologies, and Computational modeling of long stick wood gasifiers.

Accolades and Recognition

Throughout his career, Dr. Saravanakumar has earned recognition for his work, as evidenced by a patent granted for a Gasifier and a Process for Production of Producer Gas. He has also published numerous papers in international journals and presented at both national and international conferences.

Impact and Influence

His work has practical applications, evident in projects like the 2MWth and 1MWth Biomass Gasifier Project, showcasing his dedication to sustainable energy solutions. Additionally, his computational models contribute to evaluating the anticipated performance characteristics of gasifiers.

Legacy and Future Contributions

Dr. Saravanakumar's legacy includes significant contributions to the field of bio-energy and renewable technologies. With a rich academic, research, and teaching background, his future contributions are likely to further advance sustainable solutions in the realm of energy and environmental studies.

Notable Publication:

Experimental investigation and modelling study of long stick wood gasification in a top lit updraft fixed bed gasifier

Pyrolysis of lignocellulosic, algal, plastic, and other biomass wastes for biofuel production and circular bioeconomy: A review of thermogravimetric analysis (TGA) approach

Experimental investigations of long stick wood gasification in a bottom lit updraft fixed bed gasifier

Flaming pyrolysis model of the fixed bed cross draft long-stick wood gasifier

Numerical modelling of a fixed bed updraft long stick wood gasifier

Mass and energy analysis of a 60 kWth updraft gasifier using large size biomass

Operation and modelling of an updraft long-stick wood gasifier

Pilot-scale study on downdraft gasification of municipal solid waste with mass and energy balance analysis

For Waste to Energy, Assessment of Fluff Type Solid Refuse Fuel by Thermal Characteristics Analyses

Experimental investigations on sugarcane bagasse pyrolytic oil production from flash pyrolysis using a rotary screw reactor

Murali Mohan Seepana- Sustainable energy and Wastewater treatment- Best Researcher  – Award Winner 2023

Congratulations to 

Dr. Murali Mohan Seepana:

Dr. Murali Mohan Seepana, Associate Professor in the Department of Chemical Engineering at the National Institute of Technology, Warangal, has been honored with the prestigious Best Researcher Award. This recognition is a testament to his outstanding contributions to the field of Chemical Engineering and his impactful research endeavors.

professional profile:

Early Academic Pursuits:

Dr. Murali Mohan Seepana embarked on his academic journey with a profound focus on Chemical Engineering. He completed his B. Tech in Chemical Engineering from JNTU Hyderabad in 2006, achieving a commendable first-class performance with a score of 69.76%. Subsequently, he pursued his M.Tech in Chemical Engineering at IIT Delhi, graduating in 2009 with a noteworthy CGPA of 8.13/10. His academic prowess culminated in a Ph.D. in Chemical Engineering from IIT Delhi in 2013, with a remarkable CGPA of 9/10 in coursework. His doctoral thesis, titled "Synthesis and Characterization of Ion-Exchange Membrane for Vanadium Redox Flow Battery," showcased early signs of his expertise in cutting-edge research.

Professional Endeavors:

Dr. Murali Mohan Seepana has demonstrated a longstanding commitment to academia and research. He assumed the role of Assistant Professor at the National Institute of Technology, Warangal, in October 2013. Over nearly a decade, his academic journey ascended, culminating in his current position as an Associate Professor since July 2022.

Contributions and Research Focus:

His research interests span across critical areas such as Flow Batteries & Fuel Cells, Membrane synthesis, Characterization, and Wastewater Treatment. Dr. Seepana's notable contributions include spearheading various projects, such as the Royal Society international exchanges focused on tackling textile pollution, a Scheme for Promotion of Academic and Research Collaboration (SPARC) international collaborative project on hydrogen redox flow battery development, and a pilot-scale Hybrid Wastewater Treatment System.

Accolades and Recognition:

The pinnacle of Dr. Murali Mohan Seepana's career includes the Best Researcher Award conferred by the National Institute of Technology, Warangal. This prestigious accolade stands as a testament to his exemplary contributions and dedication to advancing knowledge in the field of Chemical Engineering.

Impact and Influence:

Dr. Seepana's impact extends beyond his immediate academic community. Through his guidance and mentorship, he has successfully supervised and mentored several Ph.D. and M.Tech students, contributing to the growth of budding researchers in the field.

Legacy and Future Contributions:

While Dr. Seepana has already left an indelible mark with his research achievements and the Best Researcher Award, his legacy continues to unfold. The recognition serves as both a celebration of his past accomplishments and a testament to the promising trajectory of his future contributions in the realm of Chemical Engineering. His dedication to research, innovative projects, and mentorship positions him as a leader in the academic and research community, with a promising legacy and ongoing impact.

Notable Publication:

Zirconium phosphate based proton conducting membrane for DMFC application

A review on recent advances in the application of biosurfactants in wastewater treatment

Synthesis of highly stable PTFE-ZrP-PVA composite membrane for high-temperature direct methanol fuel cell

Design of control strategies for nutrient removal in a biological wastewater treatment process

Sustainable development with renewable energy resources: a review

A novel robust Virtual Reference Feedback Tuning approach for minimum and non-minimum phase systems

Synthesis of (Si-PWA)-PVA/PTFE high-temperature proton-conducting composite membrane for DMFC

Design of fractional order PID controller using genetic algorithm optimization technique for nonlinear system

Supervisory control configurations design for nitrogen and phosphorus removal in wastewater treatment plants

Synthesis and characterization of PWA based inorganic ion-exchange membrane