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Warp wrote:
> The difference is that measuring apple pips in kilograms is rather easy,
> even without any tools. Measuring nanograms of botox is extremely difficult,
> even with really sophisticated tools.
Measuring out one nanogram of liquid is very hard.
However, I rather suspect that what they *actually* do is take (say) 1 L
of pure botox and mix with 9 L of pure water, then take 1 L of the
mixture and add it to another 9 L of pure water, then... recurse a few
times and you can create a water/botox mixture of very precise
concentration without having to actually measure anything particularly
accurately.
(Sorry... my dad actually works in a lab where we routinely make up
solutions of, say, 4 ug of aspirin per L of liquid.)
--
http://blog.orphi.me.uk/
http://www.zazzle.com/MathematicalOrchid*
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