Andrew, Cambridge asked:
You mentioned earlier that we measure things in Daltons. What actually is a Dalton?
We put this question to Dr Harren Jhoti:
Harren - Basically a Dalton is just a measure of weight, itís a measure of mass. Itís a very, very small measure of mass: something like micrograms or grams people refer to but at a kind of microscopic level, if you like. Daltons are basically very single units of small mass.
Chris - So when youíre down at the molecular level you canít use grams or even thousandths of grams? You need to use much smaller molecular units.
Harren - Thatís exactly right. Thatís the most commonly-known unit which people refer to when looking at small molecules.