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It's great when you can undo after you have already saved a document and go back, back, back... It would be even greater if everything could be really undoable. Take for example Adobe(R) Acrobat(R) Reader 9.0.0. I was reading a book of 1200 pages. I was reading one of the internal pages (don't remember which) and had arrived to the bottom of the window. I moved my hand to press the key "Page Down", but I pressed the wrong (nearby) key, which happens to be the "End" key. Ok, I said, there's the Undo command. No way, said Acrobat Reader, you can't undo. The rationale is probably: "The user has not edited the document, there is nothing to undo". Why not adopting the rationale: "Every time a key is pressed, chances are it was a mistake"??? Dear reader, don't think that, just because today's software allow for unlimited undoing, you can really undo everything. Actually there are a lot of important and common things that can...

What's the difference between the old and the new millenium? Do you remember when I described the whitening method? Now it has been published, as a peer-reviewd article, on Magnetic Resonance in Chemistry : Automatic phase correction of 2D NMR spectra by a whitening method Giuseppe Balacco, Carlos Cobas Published Online: Feb 3 2009 10:57AM DOI: 10.1002/mrc.2394 If you have followed this blog, you know that many other papers have appeared on a similar subject (automatic phase correction of 1-D spectra). In the past, to discover that the method didn't actually work, you had to write a program by yourself (apart a few lucky exceptions). If you want to verify the whitening method in practice, you have plenty of simpler and faster alternatives. You can download iNMR Passion (freeware) or you can download the freely accessible iNMR (or iNMR reader: they don't allow printing, in demo mode, which is irrelevant in our context). If you have a generic operative system you can ask for...

A bidimensional Free Induction Decay of an aqueous solution.

do you recognize it? can you do the same?

These images are 1680x1050 JPEGs because these are the dimension of my screen. It's a C-H HSQC of ubiquitine at 500 MHz, fully processed.

The above image has been generated without shades and 3-D effects: it's a plain flat map. All the optical effects come from the spectrum itself. Positive points are black, negative points are red. Click the image to see it larger.