Publications

85 works · 2012–2026

Publications per year
Publications per year
YearPublications
20121
20130
20141
20150
20160
20170
20182
20199
202017
20217
202216
202310
20248
20259
20265
Journal
72
Conference
9
Book
3
Chapter
1
2026

Characterization of Cement Samples Compositions Using Physical and Chemical Testing for Accurate Customs Tariff Classification

Faizuan Abdullah

Proceedings of Science and Mathematics

2026

Comparative Study of a Molecularly Imprinted Polymer-Based Electrochemical Sensor for Free Fatty Acid Detection

Faizuan Abdullah

Proceedings of Science and Mathematics

2026

ICP-OES-Based Determination of Mineral Content in Dates and Commercial Date Juices Available in Malaysia

Nur Syazwani Mohd Hanafiah, Nasrul Hisyam Nor Muhamad, Radhiahtul Raehan Mustafa, Faizuan Abdullah

International Journal of Academic Research in Business and Social Sciences

2026

Multi-objective Optimisation for Waste-to-energy Planning Towards Sustainability Development

Adeline Zhi Li Tan, Wai Shin Ho, Mimi H. Hassim, Faizuan Abdullah, Li Yee Lim

Environment Systems & Decisions

2026

Synthesis of a Non-enzymatic Sensor via Electropolymerization for the Determination of Lactate in Sweat

Muhammad Faiz Md Shakhih, Faizuan Abdullah, Asnida Abdul Wahab, Amirah Farhan Kamaruddin, Mohamad Ikhwan Jamaludin

Chinese Journal of Physics

2025

Assessment of Heavy Metals and Radionuclides Concentration in Indian Mackerel Fish, Rastrelliger kanagurta at Bukit Gambir Wet Market, Muar, Johor

Nor Syuhada Mat Beyi, Zaidi Embong, Norshuhaila Mohamed Sunar, Faizuan Abdullah, Abul Adli Anuar

AIP conference proceedings

2025

Dispersion and Stability Study of Functionalised Multiwalled Carbon Nanotubes and Zinc Oxide Nanoparticles in Various Dispersion Solvents

Muhammad Faiz Md Shakhih, Rabbilu Dahiru, Faizuan Abdullah, Asnida Abdul Wahab, Chong Jia Qi, Siti Aisyah Mualif, Mohamad Ikhwan Kori

Malaysian Journal of Medicine & Health Sciences

2025

Evaluation of Industrial Air Pollution Contribution by Type of Industry in Pasir Gudang Using AERMOD

Adeline Zhi Li Tan, Wai Shin Ho, Mimi H. Hassim, Faizuan Abdullah, Li Yee Lim

Environmental Monitoring and Assessment

2025

Feasibility Analysis of Carbon Nanofiber Synthesis and Morphology Control Using an LPG Premixed Flame

Iftikhar Rahman Bishal, Muhammad Hilmi Ibrahim, Norikhwan Hamzah, Mohd Zamri Mohd Yusop, Faizuan Abdullah, I Putu Tedy Indrayana, Mohd Fairus Mohd Yasin

Beilstein Journal of Nanotechnology

2025

Immobilization of Antibacterial Chlorhexidine on Biodegradable Polycaprolactone/Estradiol Electrospun Nanofibrous Membrane for Bone Regeneration

Dida Faadihilah Khrisna, Jaweria Ambreen, Tan Yu Wei, Nurul Aina Haziqah Riduan, Nurizzati Mohd Daud, Norhidayu Muhamad Zain, Faizuan Abdullah, Nik Ahmad Nizam Nik Malek, Mokhamad Fakhrul Ulum, Syafiqah Saidin

Journal of Biomedical Materials Research Part B-Applied Biomaterials

2025

Leaching Parameters Optimization and Kinetic Studies for Leaching of Copper from Zarara Hill Sulphide Ore in HCl, H2SO4 and HNO3 Solutions

Mustapha Mukhtar, Kehinde Israel Omoniyi, Faizuan Abdullah

Journal of Science Innovation and Technology Research

2025

Optimization and Validation of a Spectrophotometric Method for Trace Metal Quantification in Zarara Hill Ore, Kaduna State, Nigeria

Mukhtar Mustapha, Kehinde Israel Omoniyi, Faizuan Abdullah

Ethiopian Journal of Natural and Computational Sciences

2025

Optimization of Leaching Parameters and Kinetic Modelling for Leaching of Zinc from Zarara Hill Sulphide Ore in Different Acid Solutions

Mustapha Mukhtar, Kehinde Israel Omoniyi, Faizuan Abdullah

Journal of Sustainable Materials Processing and Management

2025

The Impact of Nickel Doping on the Structural, Morphological, Optical and Magnetic Characteristics of Zinc Oxide Nanorods

M. S. Salleh, Muhammad Safwan Abd Aziz, Muhammad Firdaus Omar, Usman Niaz, Faizuan Abdullah, Nandang Mufti, Muhammad Sufi Roslan, Nabella Sholeha, Amalia Isna Rahmawati

Journal of Physics Conference Series

2024

A Novel Approach of Photo-Charging and Dark-Discharging Mechanisms by Using V2O5/g-C3N4 Photocatalysts for Ciprofloxacin Degradation

Khairunissa Syairah Ahmad Sohaimi, Juhana Jaafar, Mohd Hafiz Dzarfan Othman, Mukhlis A. Rahman, F. Aziz, Setyo Budi Kurniawan, Faizuan Abdullah, Muhammad Faiz Md Shakhih

Applied Catalysis B: Environment and Energy

2024

Effectiveness of Ammonium-Based Deep Eutectic Solvents in Extracting Polyphenol from Chlorella vulgaris

Mohamad Hamdi Zainal-Abidin, Jia Jia Eng, Khairunnisa’ Khairuzi, Sonny Kristianto, Wan M. Asyraf Wan Mahmood, Abdo Mohammed Al‐Fakih, Juan Matmin, Roswanira Abdul Wahab, Faizuan Abdullah, Fuad Mohamad, Siti Ernieyanti Hashim, Hwee Li Teo, Syariffah Nuratiqah Syed Yaacob

Algal Research -Biomass Biofuels and Bioproducts

2024

Investigation on Optimized Flavonoid Extraction from Leucas zeylanica and Its Anthelmintic Activity

Muhammad Luqman Selahuddeen, Marouane Dhia Eddine Bouguerra, Siti Ernieyanti Hashim, Roswanira Abdul Wahab, Abdul Fatah A. Samad, Faizuan Abdullah

Malaysian Journal of Fundamental and Applied Sciences

2024

Kaji Semula Akta Jual Beli Asid Elak Disalah Guna untuk Jenayah

Faizuan Abdullah

Berita Harian

2024

Morphological and Characterization Analysis of PCL/Estradiol Electrospun Membrane for Bone Regeneration Application

Dida Faadihilah Khrisna, Norhidayu Muhamad Zain, Nurizzati Mohd Daud, Faizuan Abdullah, Nik Ahmad Nizam Nik Malek, Syafiqah Saidin

Advances in science and technology

2024

Paper Publication & Patent Filing: A Classic Dilemma for Many Researchers

Faizuan Abdullah

Fresh Newsletter

2024

Pengeurusan Sungai Mampan Jamin Pengekalan Ekosistem Karbon Biru

Faizuan Abdullah

Berita Harian

2024

Phytochemical Attributes and Pharmacological Activities of Genus Leucas: A Mini Review

Muhammad Luqman Selahuddeen, Noor Aida Fazira Mohd Salleh, Fui Lin Lee, Hemagirri Manisekaran, Marouane Dhia Eddine Bouguerra, Wan Nur Aqilah Wan Mohd Samsudin, Siti Ernieyanti Hashim, Roswanira Abdul Wahab, Abdul Fatah A. Samad, Faizuan Abdullah

Journal of Materials in Life Sciences (JOMALISC)

2023

Advancements in Zeolitic Imidazolate Frameworks (ZIFs) for Antibacterial Therapy: Recent Innovations and Future Prospects

Juan Matmin, Siti Aifa Hussin, Faizuan Abdullah, Mohamad Hamdi Zainal-Abidin, Nik Ahmad Nizam Nik Malek, Muhammad Hariz Asraf, Siti Salwa Alias

Journal of Materials in Life Sciences

2023

Blue Ecosystem Resurgence

Faizuan Abdullah

UTM Nexus

2023

Deep Eutectic Solvents as Neoteric Extraction Media for Phenolics-Rich Extract of Flower Clove

Faizuan Abdullah

3rd International Conference on Engineering and Applied Natural Sciences

2023

Effect of Fish Meal Substitution with Black Soldier Fly (Hermetia illucens) on Growth Performance, Feed Stability, Blood Biochemistry, and Liver and Gut Morphology of Siamese Fighting Fish (Betta splendens)

Zulhisyam Abdul Kari, Guillermo Téllez‐Isaías, Noor Khalidah Abdul Hamid, Nor Dini Rusli, Khairiyah Binti Mat, Suniza Anis Mohamad Sukri, Muhammad Anamul Kabir, Ahmad Razali Ishak, Nazri Che Dom, Abdel‐Wahab A. Abdel‐Warith, Elsayed M. Younis, Martina Irwan Khoo, Faizuan Abdullah, Md Shahjahan, Md Fazle Rohani, Simon J. Davies, Lee Seong Wei

Aquaculture Nutrition

2023

Electrospun Membrane Fabrication in Assisting Tissues Healing

Madeeha Sadia, Norhidayu Muhamad Zain, Nurizzati Mohd Daud, Faizuan Abdullah, Ali Dad Chandio, Iftikhar Ahmed Channa, Syed Ali Ammar Taqvi, Nik Ahmad Nizam Nik Malek, Syafiqah Saidin

Journal of Human Centered Technology

2023

Evaluation of the In-Vitro Anthelmintic Activity of Leucas zeylanica Extracts on Earthworms

Hemagirri Manisekaran, Muhammad Luqman Selahuddeen, Zaidah Rahmat, Faizuan Abdullah, Abdul Fatah A. Samad

Malaysian Applied Biology

2023

Greening Industrial Applications with Magnetic-Based Deep Eutectic Solvents: A Promising Future

Mohamad Hamdi Zainal-Abidin, Maan Hayyan, Juan Matmin, Abdo Mohammed Al‐Fakih, Naharullah Jamaluddin, Wan M. Asyraf Wan Mahmood, Roswanira Abdul Wahab, Faizuan Abdullah

Journal of Industrial and Engineering Chemistry

2023

Kesejajaran Memanfaatkan E-Sisa dalam Memacu Malaysia Madani

Faizuan Abdullah

Dewan Kosmik

2023

Optimization of Selected Heavy Metals Removal from Anchovies Using Trisodium Citrate and Peracetic Acid as Chelating Agent

P. Jaganazan, Faizuan Abdullah

Environmental and Toxicology Management

2023

Removal of Phosphate from Synthetic Wastewater by Using Marsh Clam (Polymesoda expansa) Shell as an Adsorbent

Noorul Hudai, Jing Ong, Chiew Zhi Yi, Ng Shi Yuan, Yaacob Mohamad Syahrul Syazwan, Abdul Salim Nur Atikah, Ahmad Noraziah, Mat Lazim Zainab, Nuid Maria, Faizuan Abdullah

Biointerface Research in Applied Chemistry

2022

A Review on Molecularly Imprinted Polymer (MIP) for Electrochemical Sensor Development

Anis Suzziani Rosslan, Muhammad Faiz Md Shakhih, Farah Nabila Mustafa Amirrudin, Asnida Abdul Wahab, Faizuan Abdullah, Muhammad Hanif Ramlee

Malaysian Journal of Fundamental and Applied Sciences (MJFAS)

2022

Adverse Environmental Effects of Disposable Face Masks Due to the Excess Usage

Alice Sim Hui Li, Palanivel Sathishkumar, Muhammad Luqman Selahuddeen, Wan M. Asyraf Wan Mahmood, Mohamad Hamdi Zainal-Abidin, Roswanira Abdul Wahab, Mohamad Afiq Mohamed Huri, Faizuan Abdullah

Environmental Pollution

2022

An Overview into Polyethylene Terephthalate (PET) Hydrolases and Efforts in Tailoring Enzymes for Improved Plastic Degradation

Nurul Fatin Syamimi Khairul Anuar, Fahrul Huyop, Ghani Ur-Rehman, Faizuan Abdullah, Yahaya Mohd Normi, Mohd Khalizan Sabullah, Roswanira Abdul Wahab

International Journal of Molecular Sciences

2022

Biosynthesis of Silver Nanoparticles Using Kesum Leaves: Lab-Scale Production

Faizuan Abdullah

Technical Report

2022

Boosting the Photocatalytic Activity of Electrolyte for Higher Energy Efficiency in Water Electrolysis Under Influence of an Optimal Laser

Usman Niaz, M S Aziz, Nandang Mufti, Madihah Md Salleh, Ganesan Krishnan, Siti Zaleha Daud, Faizuan Abdullah, Mohd Dzul Hakim Wirzal

Journal of Physics: Conference Series

2022

Curcumin-Loaded Electrospun Poly(ε-caprolactone) Nanofibrous Membrane: An Efficient and Biocompatible Wound-Dressing Material

Mohammed Bello, Faizuan Abdullah, Abdull Rahim Mohd Yusoff, Wan M. Asyraf Wan Mahmood, Tan Yong Chee, Nik Ahmad Nizam Nik Malek, Khairunnadwa Jemon, Palanivel Sathishkumar

Materials Letters

2022

Development of Non-enzymatic Screen-printed Carbon Electrode Sensor for Glucose Using Cyclic Voltammetry

Zamharirah Bt Ahamad Mashat, Faizuan Abdullah, Asnida Abdul Wahab, Muhammad Faiz Md Shakhih, Anis Suzziani Roslan

Environmental and Toxicology Management

2022

Electrospun Poly(ε-caprolactone)-Eggshell Membrane Nanofibrous Mat as a Potential Wound Dressing Material

Mohammed Bello, Faizuan Abdullah, Wan M. Asyraf Wan Mahmood, Nik Ahmad Nizam Nik Malek, Khairunnadwa Jemon, Shafiquzzaman Siddiquee, Tan Yong Chee, Palanivel Sathishkumar

Biochemical Engineering Journal

2022

Fabrication, Characterization and Application of Electrospun Polysulfone Membrane for Phosphate Ion Removal in Real Samples

Tan Yong Chee, Abdull Rahim Mohd Yusoff, Faizuan Abdullah, Wan M. Asyraf Wan Mahmood, M. Jasmin Fathi Jasni, Nik Ahmad Nizam Nik Malek, Nor Aziah Buang, Muthusamy Govarthanan

Chemosphere

2022

First Record of Biological Invasion Stages of the Asian Clam Corbicula fluminea (Müller, 1774) in Lake Pergau, Kelantan, Malaysia

Z. Ramli, Dee Koh Han, Faizuan Abdullah, Aweng Eh Rak, Lee Seong Wei

Multidisciplinary Sciences Publisher

2022

Layered Double Hydroxide as Adsorbent for Pollutants in Water

Faizuan Abdullah

Water and Wastewater Treatment Technology

2022

Molluscure® Inspirasi Murni Bertunjangkan Kelestarian Holistik

Faizuan Abdullah

Dewan Kosmik

2022

Sustenance from the Bushes

Faizuan Abdullah

UTM Nexus

2022

Teknologi Molluscure untuk Penghasilan Kerang yang Lebih Berkualiti dan Berdaya Saing di Pontian

Faizuan Abdullah

UTM: Penyelidikan Berimpak Mensejahterakan Masyarakat

2022

The Impact of Water Quality on the Asian Clam, Corbicula fluminea, Distribution in Pergau Lake, Kelantan, Malaysia

Aweng Eh Rak, Zulhisyam Abdul Kari, Mohd Zharif Ramli, Hasnita Che Harun, Suniza Anis Mohamad Sukri, Hazreen Nita Mohd Khalid, Faizuan Abdullah, Mahmoud A.O. Dawood, Wendy Wee, Lee Seong Wei

Saudi Journal of Biological Sciences

2022

The Larval Development of the Asian Clam, Corbicula fluminea in the Hatchery

Z. Ramli, Dee Koh Han, Faizuan Abdullah, Aweng Eh Rak, Lee Seong Wei

Agriculture Reports

2021

Are Mussel Safe to Eat?

Faizuan Abdullah

UTM Nexus Magazine

2021

Bioactivity Evaluation of Leucas zeylanica and Its Phytochemicals

Lee Fui Lin, Noor Aida Fazira Mohd Salleh, Faizuan Abdullah, Siti Ernieyanti Hashim

Malaysian Journal of Fundamental and Applied Sciences

2021

Characterization of Microplastics in the Water and Sediment of Baram River Estuary, Borneo Island

Wei Sheng Choong, Tony Hadibarata, Adhi Yuniarto, Kuok Ho Daniel Tang, Faizuan Abdullah, Muhammad Syafrudin, Dunia A. Al Farraj, Amal Mohammed Al-Mohaimeed

Marine Pollution Bulletin

2021

Electrospun Magnetic Nanocellulose–Polyethersulfone-Conjugated Aspergillus oryzae Lipase for Synthesis of Ethyl Valerate

Nurul Hidayah Hussin, Roswanira Abdul Wahab, Nursyafiqah Elias, Adikwu Gowon Jacob, Mohamad Hamdi Zainal-Abidin, Faizuan Abdullah, Nurul Jannah Sulaiman, Mailin Misson

Membranes

2021

Phytochemical and Toxicity Analysis of Leucas zeylanica Crude Extracts

Faizuan Abdullah, Noor Aida Fazira Mohd Salleh, Muhammad Luqman Selahuddeen

Environmental and Toxicology Management

2021

The Elemental Distribution Study of Heavy Metals (Fe, Cu, Cd, As, Cr, Ni and Hg) in Various Fish Species at Local Market in Muar, Johor Using SEM-EDX

Nor Syuhada Mat Beyi, Zaidi Embong, Norshuhaila Mohamed Sunar, M A B Abdul Latiff, Faizuan Abdullah, Zarizal Suhaili

IOP Conference Series Materials Science and Engineering

2021

Voltammetric Technique for Determination of Arsenic Residues in Calcium Carbide Ripened Climacteric Fruits

N. M. Shukri, Noormariah Muslim, Nurwajian Kamal, Faizuan Abdullah

Malaysian Journal of Analytical Sciences

2020

Ancaman Baharu Pelitup Muka

Faizuan Abdullah

Utusan Malaysia

2020

Determination of Volatile Organic Compounds in Ambient Air of Pasir Gudang by Using Gas Chromatography–Mass Spectrometry

Aina Syahira Rosli, Faizuan Abdullah

eProceedings Chemistry

2020

Different Thinking Hat Jigsaw Group Technique for Sampling and Sample Preparation T&L

Faizuan Abdullah

Buletin Persatuan Pendidikan Sains dan Matematik Negeri Johor

2020

Enhancement of Mercury Removal by Utilizing Catalytic Chelation Technique

Mubasher Furmuly, Faizuan Abdullah, Ihsan Wan Azelee, Razali Ismail, Fuaad Omar, Dedy Dwi Prastyo, Achmad Syafiuddin

Biointerface Research in Applied Chemistry

2020

Evaluation of Protein Content and Antioxidant Activity of Edible Bird's Nest by Various Methods

Siti Sarah Zamri, M. Mahadi, Faizuan Abdullah, Achmad Syafiuddin, Tony Hadibarata

Biointerface Research in Applied Chemistry

2020

Fabrication of Polymeric Nanofibers of Poly(ε-caprolactone) Blended with Curcumin Using Electrospinning Technique

Faizuan Abdullah

International Graduate Conference on Engineering, Science and Humanities (IGCESH) 2020

2020

High Quality of Bacterial DNA Extraction from Corbicula fluminea (Muller, 1774) Tissue in Kelantan

Koh Han Dee, Suganthi Appalasamy, Siti Nor Aini Md Nasir, Faizuan Abdullah, Maryana Mohamad Nor, Aweng Eh Rak

Malaysian Journal of Fundamental and Applied Sciences

2020

Letupan Beirut, Peringatan Keselamatan Bahan Kimia

Faizuan Abdullah

Malaysia Gazette

2020

Letupan Beirut: Peringatan untuk Dunia

Faizuan Abdullah

Utusan Malaysia

2020

Norma Baharu Bukan Sampah Baharu

Faizuan Abdullah

Kosmo!

2020

On the Taught New Tricks of Enzymes Immobilization: An All-Inclusive Overview

Roswanira Abdul Wahab, Nursyafiqah Elias, Faizuan Abdullah, Sib Krishna Ghoshal

Reactive and Functional Polymers

2020

Patuhi Piawaian Urus Bahan Kimia Elak Tragedi Beirut

Faizuan Abdullah

Berita Harian

2020

Pelitup Muka Bukan Sisa Domestik

Faizuan Abdullah

Berita Harian

2020

Peringatan Keselamatan Bahan Kimia

Faizuan Abdullah

Sinar Harian

2020

Proximate Analysis and Fatty Acid of Corbicula fluminea (C. fluminea) Tissue in Kelantan, Malaysia

Aweng Eh Rak, Siti Nor Aini Md Nasir, Maryana Mohammad Nor, Dee Koh Han, Suganthi Appalasamy, Faizuan Abdullah, Rozidaini Mohd Ghazi

Environmental Science and Pollution Research

2020

Sistem Molluscure - Inovasi Baharu Penghasilan Kerang

Faizuan Abdullah

Selangkah Ke Arah Kelestarian Global Kesusahawanan Negeri Johor

2020

Think Outside the Trash! New Normal and New Waste

Faizuan Abdullah

UTM Nexus Magazine Issue 3 2020

2019

Berita Kimia Keluaran Jun 2019

Faizuan Abdullah

Berita Kimia 2019

2019

Berita Kimia Keluaran Mac 2019

Faizuan Abdullah

Berita Kimia 2019

2019

Berita Kimia Keluaran Ogos 2019

Faizuan Abdullah

Berita Kimia 2019

2019

Berita Kimia Keluaran Oktober 2019

Faizuan Abdullah

Berita Kimia 2019

2019

Berita Kimia Keluaran September 2019

Faizuan Abdullah

Berita Kimia 2019

2019

Distinctive Organization of Aliphatic Benzene-1,3,5-tricarboxamides for Non-Optical Detection of Nitrobenzene

Faizuan Abdullah

ASEAN Emerging Researchers Conference 2019

2019

Health Risk Assessment of Heavy Metals from Smoked Corbicula fluminea Collected on Roadside Vendors at Kelantan, Malaysia

Koh Han Dee, Faizuan Abdullah, Siti Nor Aini Md Nasir, Suganthi Appalasamy, Rozidaini Mohd Ghazi, Aweng Eh Rak

Biomed Research International

2019

Heavy Metals Concentration in Etak Tissue at Different Processing Stages

Dee Koh Han, Faizuan Abdullah, Idanne Adilla Ibrahim, Nurul Inani Rozaki, Siti Nor Aini Md Nasir, Suganthi Appalasamy, Rozidaini Mohd Ghazi, Nor Hakimin Abdullah, Aweng Eh Rak

Journal of Tropical Resources and Sustainable Science

2019

Potential of Leucas zeylanica Extract to Eliminate E. coli and S. aureus in Corbicula fluminea ("Etak") Tissue

Faizuan Abdullah, Siti Nor Aini Md Nasir, Dee Koh Han, Suganthi Appalasamy, Maryana Mohamad Nor, Aweng Eh Rak

Malaysian Journal of Fundamental and Applied Sciences

2018

Environmental Forensics: A Multi-catchment Approach to Detect Origin of Sediment Featuring Two Pilot Projects in Malaysia

Kogila Vani Annammala, Anand Nainar, A. R. M. Yusoff, Zulkifli Yusop, Kawi Bidin, Rory Peter Dominic Walsh, William H. Blake, Faizuan Abdullah, Dhinesh Sugumaran, Khuneswari Gopal Pillay

2018

Preparation, Characterization, and Lead Removal Appraisal of Zinc Aluminate Prepared at Different Calcination Temperatures

Faizuan Abdullah, Abdull Rahim Mohd Yusoff, Wan Azelee Wan Abu Bakar, Razali Ismail, Achmad Syafiuddin

Journal of the Chinese Chemical Society

2014

Removal of Selected Heavy Metals from Green Mussel via Catalytic Oxidation

Faizuan Abdullah, Abdull Rahim Mohd Yusoff, Wan Azelee Wan Abu Bakar, Razali Ismail, Dwi Priya Hadiyanto

Malaysian Journal of Analytical Sciences

2012

Correlation Study Between Land Use, Water Quality, and Heavy Metals (Cd, Pb, and Zn) Content in Water and Green Lipped Mussels Perna viridis (Linnaeus.) at the Johor Strait

Tony Hadibarata, Faizuan Abdullah, Abdull Rahim Mohd Yusoff, Razali Ismail, Shamila Binti Azman, Norliyana Adnan

Water Air & Soil Pollution