Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Ferromagnetism

Ferromagnetism

Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Amidase-Catalyzed Desorption of CO<sub>2</sub> Captured in Aqueous Monoethanolamine (MEA) Solutions.

Angewandte Chemie (International ed. in English)·2026

Same author

Pulsed electric field-assisted biorefinery of soybean hulls for sequential recovery of phenolics, proteins, cellulose, hemicellulose and lignin.

International journal of biological macromolecules·2026

Same author

Metabolic thermodynamics: pertinent reference state and energy potentials.

The FEBS journal·2026

Same author

Selective Removal of Contaminant Compounds from Polyol-Rich Fermented Broth by Multicomponent Adsorption on New Adsorbent Materials.

ACS omega·2026

Same author

Effect of cell retention techniques in Komagataella phaffii lab-scale continuous processes.

Biotechnology progress·2025

Same author

Rational design of antibodies with pH-dependent antigen-binding properties using structural insights from broadly neutralizing antibodies against α-neurotoxins.

mAbs·2025

Same journal

NMR Spectroscopy: Molecular Insights into Cell Wall Collapse and Oxidative Stress of <i>Escherichia coli</i> Induced by Imidazole-Activated Eutectic Solvents.

ACS omega·2026

Same journal

Enhanced Arsenite Remediation in Synthetic FeS<sub>2</sub>/Fe(II)-Containing Arsenic Wastewater via Epigallocatechin Gallate-Initiated Persulfate Activation.

ACS omega·2026

Same journal

Defect and Particle-Size Engineering as Mechanistic Drivers for Dye Uptake in a Zirconium Metal-Organic Framework.

ACS omega·2026

Same journal

Biogeochemical Assessment of Short-Term Hydrogen Storage in Methane Reservoirs with Field Sample Characterization and Reactor Experiments.

ACS omega·2026

Same journal

Combined Effects of Halloysite Nanotubes, Nucleating Agent, and Thermal Annealing on the Printability and Mechanical Performances of 3D-Printable Polypropylene Random Copolymer-Based Composites.

ACS omega·2026

Same journal

Effect of MoS<sub>2</sub> Interfacial Engineering across MAPbI<sub>3</sub>, FAPbI<sub>3</sub>, and CsPbI<sub>3</sub> Perovskite Solar Cells.

ACS omega·2026

See all related articles

Search research articles

Related Experiment Video

Updated: May 3, 2026

Microfluidic On-chip Capture-cycloaddition Reaction to Reversibly Immobilize Small Molecules or Multi-component Structures for Biosensor Applications

Microfluidic On-chip Capture-cycloaddition Reaction to Reversibly Immobilize Small Molecules or Multi-component Structures for Biosensor Applications

Published on: September 23, 2013

Magnetically Recoverable δ‑FeOOH Particles for Multilayer Enzyme Immobilization and Surface-Induced Activity Tuning.

Francisco Lucas Chaves Almeida^1,2, Ederson Paulo Xavier Guilherme², Maria Isabel Rodriguez-Torres¹

¹Department of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Kgs Lyngby, Denmark.

|December 22, 2025

Summary

This summary is machine-generated.

Researchers developed low-cost, magnetic δ-FeOOH particles for enzyme immobilization. These particles enhance enzyme activity and stability, offering a promising platform for advanced biocatalysts.

More Related Videos

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay

Published on: February 23, 2020

Related Experiment Videos

Last Updated: May 3, 2026

Microfluidic On-chip Capture-cycloaddition Reaction to Reversibly Immobilize Small Molecules or Multi-component Structures for Biosensor Applications

Microfluidic On-chip Capture-cycloaddition Reaction to Reversibly Immobilize Small Molecules or Multi-component Structures for Biosensor Applications

Published on: September 23, 2013

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay

Electrowetting-based Digital Microfluidics Platform for Automated Enzyme-linked Immunosorbent Assay

Published on: February 23, 2020

Area of Science:

Biocatalysis and Enzyme Engineering
Materials Science for Biotechnology
Nanotechnology in Enzyme Applications

Background:

Enzyme stability is crucial for biocatalysis but often limited.
Conventional enzyme supports struggle with high loading and cost-effectiveness.
A need exists for supports offering high surface area, easy recovery, and low production cost.

Purpose of the Study:

To develop a novel, low-cost, magnetically recoverable support material for enzyme immobilization.
To investigate the impact of the support on enzyme loading, activity, and structural integrity.
To explore the potential of the support in enhancing enzymatic performance.

Main Methods:

Synthesis and characterization of superparamagnetic δ-FeOOH (feroxyhyte) particles.
Immobilization of lipase and NADH oxidase (LpNOX) onto δ-FeOOH.
Enzyme activity assays and structural analysis using circular dichroism and fluorescence spectroscopy.
Zeta potential analysis to study surface adsorption and multilayer formation.

Main Results:

δ-FeOOH enabled lipase immobilization at loadings >60 mg g⁻¹, maintaining activity and structural integrity.
Support-induced conformational changes (decreased α-helicity, increased β-sheet) did not impair enzyme performance.
Zeta potential confirmed multilayer formation and continued adsorption beyond ~40 mg g⁻¹ without functional decline.
Both immobilized lipase and LpNOX showed up to 1.3-fold activity enhancement, suggesting surface-induced activation.

Conclusions:

δ-FeOOH is a high-capacity, structurally tunable enzyme support material.
The material effectively enhances enzyme activity and stability, overcoming limitations of conventional supports.
δ-FeOOH presents a promising platform for next-generation biocatalysts, including high-density and multienzyme systems.