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Related Concept Videos

Bonding in Metals02:32

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Ferromagnetism01:31

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...
Ionic Strength: Overview01:12

Ionic Strength: Overview

The ionic strength of a solution is a quantitative way of expressing the total electrolyte concentration of a solution. This concept was first introduced in 1921 by two American physical chemists, Gilbert N. Lewis and Merle Randall, while describing the activity coefficient of strong electrolytes. During the calculation of ionic strength (I or μ), all the cations and anions are considered. However, the concentration (c) of an ion with a greater charge number (z) has a greater contribution to...
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
Microbes and Other Elemental Cycles01:24

Microbes and Other Elemental Cycles

Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...

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Related Experiment Video

Updated: Jul 22, 2026

A Colorimetric Method for Measuring Iron Content in Plants
07:12

A Colorimetric Method for Measuring Iron Content in Plants

Published on: September 7, 2018

New perspectives on iron: an introduction.

D H Boldt1

  • 1Department of Medicine, University of Texas, Health Science Center at San Antonio, 78284-7880, USA.

The American Journal of the Medical Sciences
|October 16, 1999
PubMed
Summary

Iron is vital for life, supporting cellular functions and gene expression. However, excess iron can cause harm through reactive oxygen species, impacting diseases like cancer and neurodegeneration.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Human Physiology

Background:

  • Iron is an essential nutrient for all life forms.
  • It plays critical roles in cellular respiration, proliferation, differentiation, and gene expression.
  • Emerging roles include supporting transcription of key genes and hematopoietic cell differentiation.

Purpose of the Study:

  • To explore the diverse roles of iron in biological systems.
  • To cover topics including iron absorption, transport, and regulation of gene expression.
  • To discuss the cellular biology of heme, hereditary hemochromatosis, and clinical applications.

Main Methods:

  • Symposium covering various aspects of iron biology.
  • Review of current research on iron's essential and deleterious functions.

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Setup of Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry (CE-ICP-MS) for Quantification of Iron Redox Species (Fe(II), Fe(III))
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Setup of Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry (CE-ICP-MS) for Quantification of Iron Redox Species (Fe(II), Fe(III))

Published on: May 4, 2020

Quantifiable and Inexpensive Cell-Free Fluorescent Method to Confirm the Ability of Novel Compounds to Chelate Iron
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Quantifiable and Inexpensive Cell-Free Fluorescent Method to Confirm the Ability of Novel Compounds to Chelate Iron

Published on: February 23, 2024

Related Experiment Videos

Last Updated: Jul 22, 2026

A Colorimetric Method for Measuring Iron Content in Plants
07:12

A Colorimetric Method for Measuring Iron Content in Plants

Published on: September 7, 2018

Setup of Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry (CE-ICP-MS) for Quantification of Iron Redox Species (Fe(II), Fe(III))
04:48

Setup of Capillary Electrophoresis-Inductively Coupled Plasma Mass Spectrometry (CE-ICP-MS) for Quantification of Iron Redox Species (Fe(II), Fe(III))

Published on: May 4, 2020

Quantifiable and Inexpensive Cell-Free Fluorescent Method to Confirm the Ability of Novel Compounds to Chelate Iron
05:36

Quantifiable and Inexpensive Cell-Free Fluorescent Method to Confirm the Ability of Novel Compounds to Chelate Iron

Published on: February 23, 2024

  • Discussion of clinical applications and disease states related to iron.

    • Main Results:

    • Iron's dual role: essential for cellular functions and potentially deleterious.
    • Iron's involvement in reactive oxygen species generation and associated pathologies.
    • Identification of iron's complex roles in gene expression and cell differentiation.

    Conclusions:

    • Iron's functions are essential and extraordinarily diverse.
    • Understanding iron's multifaceted roles is crucial for health and disease.
    • Further research into iron metabolism and its clinical implications is warranted.