What makes iron

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Bay Gateway. Car Recycling. Factory Clearance. Metals and Their Properties. Scrap Metal. UK Laws. Metals and their Properties: Iron. What is Iron? But there's a dark side to element number 26 too because its powerful chemistry means that it's also bad news for brain cells as Nobel Laureate Kary Mullis explains.

For the human brain, iron is essential yet deadly. This change from the relatively plentiful and soluble FeII, took a heavy toil on almost everything alive at the time. Surviving terrestrial and ocean-dwelling microbes developed soluble siderophore molecules to regain access to this plentiful, but otherwise inaccessible essential resource, which used hydroxamate or catechol chelating groups to bring the FeIII back into solution.

Eventually higher organisms including animals, evolved. And animals used the energy of oxygen recombining with the hydrocarbons and carbohydrates in plant life to enable motion. Iron was essential to this process. But no animal, however, has been able to adequately deal, in the long run - meaning eighty year life spans - with the fact that iron is essential for the conversion of solar energy to movement, but is virtually insoluble in water at neutral pH, and, even worse, is toxic.

Carbon, sulfur, nitrogen. Iron does. Systems have evolved to maintain iron in specific useful and safe configurations - enzymes which utilize its catalytic powers, or transferrins and haemosiderins, which move it around and store it. But these are not perfect. Sometimes iron atoms are misplaced, and there are no known systems to recapture iron that has precipitated inside of a cell.

In some tissues, cells overloaded with iron can be recycled or destroyed - but this doesn't work for neurons. Neurons sprout thousands of processes during their existence - reaching out to form networks of connections to other neurons.

During development of the adult human brain a large percentage of cells are completely eliminated, and some new ones are added.

It is a learning process. But once an area of the brain is up and running, there is nothing that can be done biologically, if a large number of its cells stop working for any reason.

And the slow creep of precipitating iron over many decades is perhaps most often that reason. In less sophisticated tissues, like the liver, new stem cells can be activated, but in the brain, trained, structurally complex, interconnected neurons are needed, with thousands of projections that are accumulated over a lifetime of learning.

So the result is slowly progressive neurodegenerative disease, like Parkinson's and Alzheimer's. This same basic mechanism can result in a variety of diseases. There are twenty or thirty proteins that that deal with iron in the brain - holding iron and passing it from place to place.

Every new individual endowed with a new set of chromosomes is endowed with a new set of these proteins. Some combinations will be better than others and some will be dangerous individually and collectively. A mutation in a gene that codes for one of these proteins could disrupt its function - allowing iron atoms to become lost. These atoms that have been lost from the chemical groups that hold them will not always be safely returned to some structure like transferrin or haemoferritin.

Some of them will react with water and be lost forever. Only they aren't really lost. They are piling up in the unlucky cell types that were the designated locations for expression of the most iron-leaky proteins. And oxides of iron are not just taking up critical space. Iron is very reactive. The infamous "Reactive Oxygen Species" which have been suspected of causing so many age related illnesses may just derive from various forms of iron. It is time for specialists trained in chemistry, and with an eye to the chemistry of iron, to pay some attention to neurodegenerative disease.

Kary Mullis telling the story of iron, the element that we can't do without, but which at the same time could hold the key to our neurological downfall. Next time on Chemistry in its Element Johnny Ball will tell the story of Marie Curie and the element that she discovered and then named after her homeland.

Pitchblende, a uranium bearing ore, seemed to be far too radio active than could be accounted for by the uranium. They sieved and sorted by hand ounce by ounce through tons of pitchblende in a drafty, freezing shed, before eventually tiny amounts of polonium were discovered.

So be radioactive or at least podcast proactive and join us for the mysterious story of Polonium on next week's Chemistry in its Element.

I'm Chris Smith, thank you for listening, see you next time. Chemistry in its element is brought to you by the Royal Society of Chemistry and produced by thenakedscientists. There's more information and other episodes of Chemistry in its element on our website at chemistryworld. Click here to view videos about Iron. View videos about. Help Text. Learn Chemistry : Your single route to hundreds of free-to-access chemistry teaching resources. We hope that you enjoy your visit to this Site.

We welcome your feedback. Data W. Haynes, ed. Version 1. Coursey, D. Schwab, J. Tsai, and R. Dragoset, Atomic Weights and Isotopic Compositions version 4. Periodic Table of Videos , accessed December Podcasts Produced by The Naked Scientists. Download our free Periodic Table app for mobile phones and tablets. Explore all elements. D Dysprosium Dubnium Darmstadtium. E Europium Erbium Einsteinium. F Fluorine Francium Fermium Flerovium.

G Gallium Germanium Gadolinium Gold. I Iron Indium Iodine Iridium. K Krypton. O Oxygen Osmium Oganesson. U Uranium. V Vanadium. X Xenon. Y Yttrium Ytterbium. Z Zinc Zirconium. Membership Become a member Connect with others Supporting individuals Supporting organisations Manage my membership.

Facebook Twitter LinkedIn Youtube. Discovery date. Discovered by. Origin of the name. The name comes from the Anglo-Saxon name 'iren'. Melting point. Boiling point. Atomic number. Relative atomic mass. Key isotopes. Electron configuration. An Inventory from lists equipment such as Tongs and Hooks which would have been used for drawing the iron between passes.

Between each pass iron would have needed reheating and there were furnaces for this purpose. There is no customer list available for Wilsontown Ironworks but we know of one or two customers, e. Richard Crawshay, who bought bar iron.

The Wilsons sold their iron through iron merchants who had large warehouses, like James Pillans in Leith. We know that iron from Wilsontown went to warehouses in Leith, Glasgow and London. How iron is made. In this section. Aoineadh Mor Inniemore. Caisteal Grugaig broch.

Clune Wood recumbent stone circle. Wilsontown's history. Wilsontown's history timeline. What is Iron? Image, right: ore being mined from bell pits at Wilsontown. The recipe for making iron The men working in the charging house at the blast furnaces would have been perhaps the most skilled workers at the Ironworks. Diagram of the furnace at Wilsontown Once the mixture had been heated for the required period and the slag tapped off, a tap would be opened at the bottom of the blast furnace for the molten iron to flow out from.

Inside a blast furnace After pig iron was made at the blast furnaces some of it would then be taken to the refineries then the forge and the rolling mill. The Refineries There were two blast-refineries at Wilsontown where pig iron was first subjected to a blast of air to burn out some of the impurities before puddling.

The Forge Detail from the forge at WilsontownA forge is a building where metal is heated and shaped. The Rolling Mill Details from the rolling mill at WilsontownA rolling mill is a factory for shaping metal by passing it between pairs of rolls. What did they make at Wilsontown? Our website uses cookies. We use cookies that are essential for the site to work. We also use non-essential cookies to help us improve our website.

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