List of communications

Plenary Lectures

PL1 - Lino Ferreira

Drug delivery for tissue regeneration and to fight aging

PL2 - Alberto Fernandez-Nieves

Topological Defects in Active Nematics

PL3 - Maria Ibánez

Solution-Processed Inorganic Thermoelectric Materials: new avenues for material control

PL4 - Elisabete Oliveira

Colloids and interfaces: bridging nanoscience to health

PL5 - Marjolein Dijkstra

Accelerating the design of soft materials using machine learning

 

Invited Lectures

IL1 - Laura Arriaga

Rolling vesicles as tribological tools

IL2 - Carlos Baleizão

Tuning the morphology of hybrid polymer@silica nanocarriers

IL3 - Natércia Martins

Printing strategies for surface-enhanced Raman scattering active nanostructures

IL4 – Isabel Oliveira

Unraveling nano/micro tubules from amino acid-based surfactants: from self-assembly to applications

IL5- Simona Bettini

Physical-chemical design of ZnO nano- and micro-structures for photo- and piezo-catalytic applications

IL6- Carlos Abreu

Polymer nanoparticles from nano-emulsions: physicochemical and biomedical aspects 

IL7 - Paulo Abreu

In the lab with Brillart-Savarin

IL8 - Beatriz Pelaz García

Design of smart nanocarriers

IL9 - Bruno Medronho

On the valorization of agroforestry residues into novel bio-based materials

Oral communications

OC1A - Rubén Gil Gonzalo

Delivering antibiotics: chitosan-coated liposomes for ciprofloxacin controlled release

OC2A - Carolina Carrillo Carrión

Taking advantage of Metal-Organic Frameworks to enhance the therapeutic efficiency of Immuno-Glyco-compounds

OC3A - Mónica Muñoz Úbeda

Lipid NanoParticles (LNPs) as Promising Nano-Trojan-Horses for Nucleic Acids-Based Therapies

OC4A - Angela Jedlovszky-Hajdu

Nanoparticle-polymer composite electrospun scaffolds for biomedical applications

OC5A - Martina Lonza

Effect of Seeding Conditions on the in situ Growth of Gold Nanostars in Microfluidic Devices

OC6A - Guillermo Camacho Villar

Multiaxial toggled magnetic field self-assembly

OC7A - Xaniar Esmaeilzadeh

Effect of Plasmonic Heating on the Protein Corona Formation of Different Funtionalized Anisotropic Metal Nanoparticles

OC8A - Giovana Colucci

Colloidal lignin particles as innovative Pickering emulsion stabilizers: stabilization mechanisms and characterization

OC9A – Leixuri B. Berganza

Synthesis of Ultra-Small Gold Nanostars for Applications in Catalysis, Sensing and Photothermia

OC10A - Andrea Gregorio Gomes

From fluid dispersions to colloidal hydrogels: a wide range of texture systems based on gelled-oil nanoparticles in water.

OC11A - Maria João Fernandes Faria

Development of Monoolein and Phytantriol-Enriched Lipid Nanocarriers for Topical Ocular Delivery

OC12A - Stephany Cunha de Rezende

Optimizing Pickering emulsion production from curcumin-pectin solid dispersion-based particles

OC13A - José Manuel Gaspar Martinho

Encapsulation of Gold Nanoclusters in Polymer Nanoparticles and Micelles

OC14A - Maria Inês de Azevedo Freitas Teixeira

Unlocking the Potential of Lactoferrin Functionalized Lipid Nanoparticles for the Treatment of Amyotrophic Lateral Sclerosis

OC15A - Andrés Serrano Freijeiro

Chiral Au nanorods for Enantioselective Raman Spectroscopy

OC16A - Irene López Sicilia

Bipyramid-shaped gold plasmonic nanoparticles for photothermal therapy at the air-water interface

OC17A - Katalin Viktória Bere

Effects of Fluorocarbon Chain Length on the Adsorption of Perfluoroalkyl Substances on Nanoplastic Particles

OC18A - Lucas Chiarentin

Particle size by design: laser light diffraction and static image analysis with insights from Raman spectroscopy

OC19A - Sabina Arias Vásquez

Hydrodynamic evaluation of gold nanoparticles in microfluidics device

OC20A – Jorge Pérez-Juste

Synthesis, Properties and Applications of Plasmonic Nanorattles

OC21A - Maria Manuel Feliciano da Costa Mendes

Boosting the therapy of glioblastoma with chemodynamic-hybrid nanoparticles

OC22A - Adri Escañuela-Copado

Molecular dynamics of multifunctional polymer nanocomposites

OC23A - Gianluca Utzeri

From earth to earth

OC24A - Adrián Díaz Acosta

Molecular Dynamics of board-shaped mesogens. From phase behaviour to dynamics.

OC25A - Alberto Martin-Molina

Coarse-grained simulations of hybrid microgels with biomedical applications

OC26A - Carlos Calero Borrallo

Enhancement of effective diffusion in active colloids with time-dependent propulsion velocity

OC27A - Cláudia Maria Batista Lopes

Vermiculite based sorbents for neodymium and dysprosium recovery from synthetic leachates

OC1B - Dmitriy Valentim Xilai Moreira

Self-assembled nanostructures based on chalcone/flavylium photoswitches for smart delivery of nucleic acids

OC2B - Henrique Emanuel Araújo Silva

Graphene/DOX-based lipid nanosystems for cancer theranostics

OC3B - Juan F. Miravet

(Bola)amphiphiles derived from amino acids: gels, nanogels, and vesicles for transport/release of bioactive species

OC4B - Lara Costas-Ríos

Novel bacterial biosensors based on SERS for multiplex detection

OC5B - Adrián Pérez López

SMALPs for drug encapsulation

OC6B - Osvaldo Beltran Osuna

Biomimetic Theranostic Nanoparticles for the Treatment of Atherosclerosis

OC7B - Aixa-Maria Aguilera-Garrido

Indocyanine green and indocyanine green dimer-based polymeric nanosystems as photothermal therapy agents

OC8B - Pedro Afonso da Silva Valente

FTIR Analysis of Liquid Biopsies: Unveiling Metabolic Changes in Sedentary Individuals During a Three-Month Exercise Protocol Using Unsupervised Machine Learning

OC9B - Ana Beatriz Vitorino Pereira

An innovative way of combating biofilms: Delivery of quercetin and omega-3 fatty acids by Nanostructured Lipid Carriers

OC10B - Carmen Sofia da Rocha Freire

Bacterial Nanocellulose: a singular natural hydrocolloid for the design of innovative materials

OC11B - Ana Luísa Gomes Júlio

Boosting lipid nanoparticles performance with choline-based ILs

OC12B - Vitor Manuel dos Santos Francisco

Nanoformulations to tackle senescent cells

OC13B - Ana Margarida Loureiro Piloto Cerqueira

Sensitive ratiometric imprinted hydrogel for the detection of matrix metalloproteinase 7 (MMP7) biomarker

OC14B - Antonio Topete Camacho

Synthesis and In vitro Evaluation of Bimetallic Nanoshells for Cancer Chemo-, Photothermal- and Immunotherapy

OC15B - Mariana Sampaio Terroso

Resveratrol and Omega-3 fatty acid-loaded Liposomes as Antibiofilm Strategies against S. aureus and E. coli

OC16B - Artai Toba Pérez

Development of a microfluidic droplet-based sensor for the detection of bacteria biosensors by SERS

OC17B - Natalia Andrea Hassan López

Microfluidic Platform for Enhanced Detection of Breast Cancer Cell Line-Derived Exosomes

OC18B - Rui Pedro Leal Machado

Responsive polymer/surfactant hydrogels for topical drug delivery

OC19B - Óscar Abelenda Caamaño

PLGA nanoparticles functionalized with adipose membrane for the treatment of obesity with Rosiglitazone

OC20B - Cláudia Patrícia Vilela Teixeira

Design and in vitro therapeutic performance of pH-responsive LLC nanoassemblies for cancer treatment

OC21B - Nadesh Fiuza Maneiro

Chiral Resonant Metasurfaces for Broad-band Circularly Polarized Luminescence

OC22B – Luis Alves

On the development of novel cellulose derivatives for microplastic flocculation

OC23B - Maria Inês da Cruz Roque

How to avoid Disinfection Byproducts in Drinking Water? The potential of Adsorption and Photocatalysis

OC24B - María Pedrosa Bustos

Effect of anticancer systems on model and extracted cell membranes as fluid films

OC25B - Juan Jose Giner Casares

Tuning intermolecular interactions at air/water interface by the Langmuir method

OC26B - Armando Maestro

Peptide-guided Self-Assembly: Fabrication of Tailored Spiral-like Nanostructures for Precise Inorganic Templating

OC27B - María Dolores Merchán Moreno

Synthesis and Characterization of Hybrids of Manganese and Graphene Oxide

OC1C - Ana Carolina Freitas de Jesus

Physico-chemical Characterization of N-alkyldimethylglucosylammonium iodide: new sugar-based cationic surfactants

OC2C - Pablo Gómez Argudo

Deciphering Protein and DNA Condensate Structures through Coherent Anti-Stokes Raman Spectroscopy

OC3C - Filipa Manuela Braga Teixeira de Sousa

Optimization of Lyophilized Chitosan-Coated Alginate Microcapsules with Nystatin for Nose Delivery via Machine Learning

OC4C - Inés Adam Cervera

Polymer nanoparticles functionalized with organic ligands for catalytic applications

OC5C - Jordi Esquena

Formation and properties of DNA-Gelatin coacervate microgels

OC6C - Alejandro Ogando Cortés

Gold nanocluster protein driven green synthesis: a look into the protein template impact

OC7C - Sara Fateixa

One-step exfoliation method for producing 2D transition metal disulfide substrates for SERS

OC8C - Alejandro David Varela Dopico

Synthesis and Characterization of Porous Si@MOF Nanocomposites as Advanced Lithium-Ion Battery Anodes

OC9C - Joana Mafalda Nunes Paulo Silva Martins

Dual-emission sensing systems in phospholipidic artificial membranes

OC10C - Juliette Fitremann

Supramolecular hydrogels of N-alkyl-D-galactonamides:  Cell culture, 3D Printing and Metallogels

OC11C - Mira Abou Dib

Bio-sourced amphiphilic xanthan, effective candidate to replace conversional surfactants

OC12C – Eduardo Guzmán

Non-equilibrium character of oppositely charged polyelectrolyte-surfactant systems: bulk and interfacial aspects

OC13C - Rafael Muñoz-Espí

Nanoencapsulation of Organic Phase Change Materials in Conductive Polymers for Thermal Energy Storage Coatings

OC14C - Francisco José Parente Mesquita de Sousa

Rice Husk as Reinforcement Fibre for PLA and PBS based Composites

OC15C - Susana Margarida Neto Simões

Spatially Controlled Release of CRISPR/Cas9 Formulation for Brain Gene Editing

OC16C - Samuel Funes Hernando

Magnetic nanocomposites (Co-doped magnetite@UiO-66) for magnetic hyperthermia

OC17C - Manuel Ceballos

Synthetic Strategies for Zr-based MOF Growth on Plasmonic Nanoparticles: Core-Shell Photoactive Microporous Nanocarriers

OC18C - Marek Grzelczak

Dynamic nanosystems sustained by thermoplasmonic effect

OC19C - Rui André Gonçalves Cardoso

Unveiling the Mechanisms of Sustained Antibacterial Activity of Copper Nanoparticle-Coated Fabrics

OC20C - Pedro Miguel Cruz Matias

Removal of sulfamethazine and tetracycline from water using a triazine porous organic polymer

OC21C - Roger Bresoli Obach

The Use of Optical Forces for Colloidal Assembly Formation at Interfaces, Expanding Outside the Irradiated Area

OC22C - Julia Maldonado-Valderrama

Surface properties of thermoresponsive microgels based on oligo(ethylene glycol)

OC23C - Cláudio Manuel Rodrigues de Almeida

Paper-supporting ratiometric sensor probes based on lanthanide complexes for biogenic amines detection

OC24C - José Carlos Ruiz López

Microstructural Characterization of Magnetic Colloids using Magnetic Susceptibility Measurements

OC25C - Derval dos Santo Rosa

Starch films incorporating chitosan nanocapsules with cinnamon essential oil: Applications in active packaging for food preservation

OC26C - Telma Sofia Martins Costa

Solvent-Driven Self-Organization of Meso-Substituted Porphyrins: Fluorescence Lifetime Imaging Microscopy

OC27C - Carlos Miguel Rocha Abreu

Poly(vinyl chloride) based innovative materials by advanced polymerization and self-assembly methods

Poster communications

P1 – Eduardo Jorge Figueira Marques

Insight into the surfactant-assisted dispersibility of 1D and 2D nanomaterials in water: carbon nanotubes, graphene and TMDs

P2 - Carlos Miguel Rocha Abreu

Polymerization induced self-assembly of poly(vinyl chloride) based block copolymer nanoparticles

P3 - Talita Colombi Rezende

Poly(N-vinylcaprolactam)-b-poly(vinyl chloride) block copolymers: synthesis, self-assembly and thermoresponsive behavior

P4 - María Dolores Merchán Moreno

Revisited Synthesis of Nitrogen-doped Carbon Nanodots from Citric Acid

P5 - Miguel Chaves de Sousa

Hybrid composites based on Au nanoparticles and covalent organic polymer for the SERS identification of saxitoxin

P6 - Sara Rodríguez Da Silva

Hybrid plasmonic-quiral MOFs heteroestructures for enantioselective recognition

P7 - Oleg Semenov

Novel rare-earth MOFs with the flexible behavior for sensing volatile organic compound

P8 - Cristina Pérez Olivares

Development of Plasmonic SERS Substrates based of Periodic Arrays of Silver nanoparticles for Ultradetection applications

P9 - Paula Sanmartín Rodríguez

Fabrication of sustainable organic materials for nanophotonics based on cyanine dyes

P10 - Cláudia Batista Lopes

Synthesis and characterization of graphite-based nanocomposites for adsorption of drugs in water

P11 – Carla Vitorino

Engineering cationic carriers for dual delivery for the treatment of brain tumors

P12 - Natalia Andrea Hassan López

Synthesis of Gold-Coated Nanoparticles via Microfluidics Using Gold-Albumin Nanoclusters Conjugated with Folic Acid for Nanomedicine Applications

P13 - Cláudia Patrícia Vilela Teixeira

Toxicity Comparison of Cubosomes Nanocarrier and its components: in vitro and in vivo tests

P14 - Isabel Maria Santos da Costa Oliveira

Serine-based gemini surfactants for gene delivery: insights into self-assembly and DNA compaction

P15 - Eder Ramin de Oliveira

Cardamom essential oil behavior in Pickering emulsions and its possible use for active packaging

P16 - Licínia de Lurdes Gomes Justino Simões

Indigo carmine food dye (E132) binding to Cu(II) in aqueous solution and solid state: a spectroscopic and DFT characterization study

P17 - Rui Pedro Leal Machado

Creating stable nanocarriers from cationic/anionic surfactant mixtures for the delivery of bioactive C. cardunculus extracts

P18 - Daniela Oliveira

Development of an immunosensor based on quantum dots with different emissions for the detection of cancer biomarkers

P19 - Eduarda Manuela Forte Rodrigues

Ratiometric determination of CA19-9 using fluorescent carbon dots and yellow-emitting quantum dots

P20 - Ana Xu

Detection of CA19-9 using Fluorescent Polymer Imprinted Membranes

P21 - Elsa Margarida Fonseca Cardoso Loureiro

Interactions between biofriendly surfactants and block copolymers of different hydrophobic/hydrophilic balance leading to hybrid gels

P22 - Dmitriy Valentim Xilai Moreira

Dual-responsive catanionic vesicles containing a chalcone/flavylium derivative: A novel approach for doxorubicin delivery

P23 - Aitana Zoco De La Fuente

Structure, rheological behavior and drug release profile of polymer/vesicle gels

P24 - Julia Maldonado-Valderrama

Spray Drying Microencapsulation of Bioactives for Innovative Culinary Applications

P25 - Sarolta Halmóczki

Fabrication of Electrospun Polymer Matrices Embedded with Metal Nanoparticles for Antibacterial Wound Dressings

P26 - Maria João Álvaro Albuquerque Martins

Surface Engineering of Fluorescent Silica Nanoparticles for Targeted Tumor Imaging

P27 - Jailson de Araujo Santos

PVA Hydrogels Loaded with DNA: A Breakthrough in Gene Therapy

P28 - Mariana Navarro-Real

Development of a combined chemo-PDT nano immunotherapy for cancer treatment

P29 - Diogo Filipe Pires Marinheiro

Enhancing the Antidiabetic Potential of Chrysin Through Metal Complexation and Nanoencapsulation

P30 - Veronika Pálos

Inorganic salt-polysuccinimide composite scaffold for potential wound dressing application

P31 - Bruno Filipe Figueiras Medronho

From seed to solution: carob by-products as novel biomaterials for a more sustainable agriculture

P32 - Sandra Cristina da Cruz Nunes

Antibiotics: identification and characterization using machine learning as a playground.

P33 - Ana Luísa Gomes Júlio

Innovative Cerosomes: A multifaceted solution addressing Xeroderma Pigmentosum

P34 - Mariangel Luna Verdugo

Development of Platelet Membrane-Coated Polymeric Nanoplatforms for Atherosclerosis Therapy

P35 - Eduardo Jorge Figueira Marques

Colloidal assembly of (MoS2/graphene)/carbon nanotube composites to develop electrocatalysts for oxygen energy-related reactions

P36 - Iago López Fernández

Silica shell as protecting coating for perovskite nanocrystals against external factors

P37- Valentín García Caballero

Influence of purification at electrolyte-plasmonic nanoparticles interfaces for ORR

P38 - Talles Barcelos da Costa

Removal of potentially toxic metals from aqueous solution using nanocellulose chemically modified by succinylation

P39 - Leonardo José Oliveira Amaral

Addressing Pesticide Pollution: Magnetic MoS2-Fe3O4 Nanomaterials for Water Treatment

P40 - Ana Maria Gomes Vieira

Antibiotic monitoring in water by surface enhanced-Raman scattering

P41 - Sofia Farias Soares

Magnetic bionanocomposites based on chitosan for SERS detection of water pollutants

P42 - Nadesh Fiuza Maneiro

Monitoring Molecular Ligands and Metal Halides for Enhancement of Optoelectronic Properties of CsPbCl3 Perovskite Nanocrystals

P43 - Ana Estrada

Multifunctional CuS urchin-like nanostructures for adsorption and photocatalytic degradation of water contaminants

P44 - Ana Estrada

Photodegradation of 4-nitrophenol using different metal oxide photocatalysts

P45 - Nuno Miguel Jesuíno Basílio

Photomodulation of Peptide Transport Across Lipid Membranes by Light-Responsive Calixarene Activators

P46 - Tonny Araujo Moreira

One-step sol-gel reaction of colloidal magnetite nanocrystals functionalized with organic ligands

P47 - Joana Rita Simões Figueiredo

SERS-active zinc chalcogenide-based substrates for 4-mercaptopyridine Raman detection

P48 - Carla Sofia Pinheiro Vitorino

Surface matters: The delivery dilemma using lipid nanoparticles in glioblastoma

P49 - Natércia da Conceição Tomé Martins

Long term effects of gold colloids on freshwater microalgae: a comparative study of conventional and green synthesis methods

P50 - Pedro Miguel Carneiro Oliveira

Paper-based Approach for Cancer Biomarker MMP7 Detection using Quantum Dots and Molecularly Imprinted Polymers

P51 - Jorge Manuel Campos Marques

Structure, energetics, and thermodynamics of charged colloidal clusters modeled with isotropic potentials

P52 - Ana Marta Amaro Cabral

Bioinspired photonic sensors assembled from stimuli-responsive polymer nanoparticles

P53 - Pedro Alexandre de Sousa Rosa

Controlling Protein Release with Tailored Pore Functionalization in Mesoporous Silica Nanoparticles

P54 - Cristiana Videira Ramos

From Synthesis to Characterization: Exploring the Impact of Polymer Brush Coatings on Liposomal Membranes

P55 - Francisco Galisteo González

Exploring the Impact of Nanoparticle Stealth Coatings in Cancer Models: From PEGylation to Cell Membrane Coating Nanotechnology

P56 - Qiuiping Qian

Environmentally stable Au-Ag cysteine nanocomposite  coordination polymer with tunable chirality

P57 - Ana Sánchez-Iglesias

Extending chemical space control in the synthesis of gold bipyramids

P58 – Saeedeh Pouri

Green synthesis of colloidal AgNps assisted by chitosan extracted from Loligo-Loligo and IIIex Argentinus

P59 - Andrea Moreno Revuelta

Maslinic acid solid lipid nanoparticles as hydrophobic drug carriers: Characterization, in vitro activity and in vivo biodistribution

P60 - Carolina Carrillo Carrión

Insights into the mechanism of formation of Glyco-Zeolitic-Imidazolate Frameworks nanoparticles

P61 - Alfredo Casasnovas Melián

Darkfield microscopy for plasmonic nanosensing

P62 - Josue Juárez

Aqueous aggregation of oligochitosan hydrophobized with oleic acid

P63 - Jelena Pajovic

Photoisomerization dynamics of azobenzene species on noble metal nanoparticles

P64 - Alexandra Francisco Casaleiro

Characterization of waste and regenerated lubricant oil – an efficiency study

P65 - Diana M. Galindres-Jimeneza

Surface tension and aggregation behavior of resorcin[4]arenes in the presence of NaCl and protein

P66 - Eder Ramin de Oliveira

Cinnamomum cassia essential oil emulsions stabilized with Tween 80 for possible agricultural applications

P67 - Adri Escañuela-Copado

Overcoming experimental hurdles in colloidal characterization and analysis of drug encapsulation/release in thermosensitive microgels

P68 – Ana Cristina Faria Ribeiro

Effect of sodium perchlorate on diffusion of poly(vinyl alcohol) in aqueous solutions

P69 – Ana Cristina Faria Ribeiro

Coupled diffusion of analgesic drugs and caffeine in polymeric solutions

P70 - Heloísa Helena Scorsato de Almeida

Xanthan gum biosynthesis in the presence of hydrosols and its use to produce antimicrobial products

P71 - Ana Maria Telmo Dias Pereira Vicente Cabral

Coupled transport of nickel ions in aqueous electrolytic solutions and surfactants solutions

P72 - Ana Maria Telmo Dias Pereira Vicente Cabral

Transport Properties of the First-line Antituberculous Drugs in Multicomponent Systems

P73 - Joana Filipa Monteiro de Sousa

Adsorption of tetracycline antibiotic from aqueous solution by chitosan and naphthaldehyde derivatives composites

P74 - Sandra Cristina da Cruz Nunes

DNA-based nanocages: shape and electrostatics

 

P75 - Larissa Camargo Ghirro

Development of Pickering stabilizers from plant-based proteins

P76 - Leandro Lima Aquino

A rheological investigation focusing on protein-rich hydrogels based on Spirulina platensis biomass

P77 - Ana Rita Alexandre Ramos

Synthesis of amine-based cyclodextrin nanosponges for the removal of antibiotics and synthetic dyes

P78 – Liandra Gracher Teixeira

Optimisation of stability and colouring power of double emulsion systems loaded with Daucus carota L.

P79 – Havila Maria Melo Souza Sales

Synthesis of TiO2/SiO2 monolithic aerogels reinforced with cellulose fibers

P80 – Paulo David Nunes Barradas

Chitosan polymers randomly labeled with pyrene: synthesis, photophysics, and selective quenching by metal cations and anions

P81 – Adria Perez Calm

Polymerized concentrated emulsions for encapsulation of phase change materials

P82 – Tiago Ferreira Machado

Diazo– and Tröger’s Base–linked POPs for Dye Adsorption from Aqueous Solution

P83– Luana Aparecida Silvestre Braga

Spectroscopic and microbiological study of chitosan membranes with Zn2+-curcumin and Cu2+-curcumin complexes

P84 – Beatriz Martins Bandeira Pinto de Sousa

Bioprobes based on 2D materials interfaces functionalized with fluorescent macrocycles

P85 – María José Gálvez Ruiz

Effect of Maslinic Acid Nanoparticles on Healthy and Tumor Membrane Langmuir Films

P86 – Margarida Inês Madeira Esteves

Amino Acid-based Surfactants Derived from Used Cooking Oils: The Pursue for a Sustainable Synthesis

P87 – Licínia de Lurdes Gomes Justino Simões

Alizarin red S complexes with Mo(VI) and their interaction with cationic surfactants: potential for applications in sensing

P88 – Tânia Firmino Guerra Guerreiro Cova

Characterization of PFASs using machine learning and electronic structure calculations

P89 – Tânia Firmino Guerra Guerreiro Cova

Exploring Molecular Descriptors for Mycotoxin Identification and Characterization through Machine Learning

P90 – Almudena Crespo

Effect of sodium dodecyl sulfate on sodium sulfadiazine in aqueous solution