Minerals in our food – Calcium

Yesterday, I posted a question asking for (bones aside) two uses of calcium in the body. Well, we need it for teeth but also for muscle contraction (especially in the heart) and the release of neurotransmitters. So if you got these as your answers, award yourself 100 points. By No machine-readable author provided. Gleam~commonswiki assumed (based on copyright claims). [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) via Wikimedia CommonsIt should be noted that the body does not use calcium metal, but calcium2+ ions (Ca2+). However, ...

Finding the needle

You will have heard of the saying 'like trying to find a needle in a haystack' , well how about this one, 'trying to find a single atom in a crystal'. This phenomena has now been successfully carried out by a research team. Individual atoms of lanthanum have been observed in crystals of calcium titanate. The technique used involves using an electron microscope that has its beam narrowed by a technique called 'abberation-correction'. It is hoped that it will allow scientists an improved ...

Toxic Sludge

  What have Iron Oxide, Aluminium Oxide, Silicon Dioxide, Titanium Dioxide and Sodium Oxide all got in common? Well, they were the substances found in the highest concentrations in the recent toxic sludge spill in Hungary. What effect will they have? It seems open to debate at ther moment but you can read more here: http://www.bbc.co.uk/news/world-europe-11492387