Jun 5, 2006
Tequila time!
Back online after a short break and catching up with my various articles that have published while I was away!
So, in the latest issue of Reactive Reports you can read about a testing times for tequila, whether celebrating Cinco de Mayo or just having another relaxing day in Margaritaville. The new chemical test could be the assurance you need that the bottle you’re downing is genuine tequila. Also in this issue, we find out how to test the byproducts of cell death, get the fizz on the benzene in soft drinks story, and follow the life and times of cheminformatics expert Wendy Warr.
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hi…was wondering if you could add some stuff about pI values onto your chemistry tutorials…would really help!
I was initially at a loss as to what pI values were. Obviously, we have pH and pKa, and logP and logP(i) etc etc…but then I thought maybe the I (el) is an l (eye) and it struck me…
“Isoelectric point”
By definition (courtesy of Wikipedia, of course), Isoelectric point is the pH at which a molecule carries no net electrical charge and is a rather useful value for those studying amino acids and drug molecules, for instance. Amino acids feature in pI discussions primarily because they have an acid (carboxyl group) and a base (amino group) component and so are amphoteric.
Anyway, I’ll leave readers to take in the Wikipedia entry on the subject and if pI ever features in a news story, I’ll be sure to give this comment a mention.