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The Story Behind the Picture

The picture in this page is a good example of the power of SwaN-MR. It demonstrates that the peak on the left should be assigned to residue no. 3 (Hyp) instead of no. 8 (Oic) as erroneously published on J. Am. Chem. Soc. 1994, 116, 7532-7540.
One may object that I unmasked the error because I acquired the spectrum again and not because of SwaN-MR. If this is true, it is also true that SwaN-MR gave me a simple and elegant way to demonstrate my thesis. By the way: generating the above gif image has also been incredibly simple with SwaN-MR. The whole work was done on a Quadra 610 upgraded to the PowerPC.

Dear Giuseppe Balacco,
an interesting picture located at http://qobrue.usc.es/jsgroup/Swan/ Found this more accidentally. Nevertheless this isn't correct in the manner described. Of course you are unfortunately right concerning the misassignment (as stated few years ago). But this was no problem concerning the spectra quality but a change of the substance between the acquisition of the spectra for assignment purposes and the NOESY spectrum.
Best regards
Rainer Haessner

The Story Behind the Name SwaN-MR

In 1992, when I conceived the program, I was confused by existing software. f1 was designed as the second dimension and f2 as the first dimension. I was never able to remember the meaning of the gaussian broadening coefficient, and so on. I could describe the situation with the verse:
Whisky is water and water is wine
which I heard into a song called Swan Swan H.
In Swan-MR f1 is f1, f2 is f2 and when you apply a 1 Hz gaussian broadening to a peak it becomes 1 Hz broader.

The History Before Us

A variety of computer programmes is now available and it appears that we are rapidly approaching the day when spectrometer-computer interfacing will permit N.M.R. spectral analysis to be performed in an entirely automatic fashion.
Gerhard Binsch, Mol. Phys. 1968, 15, 469
The above words must probably be interpreted. It is interesting to note how the major problem was interfacing the spectrometer to the computer and not the subsequent numerical treatment. In many cases this is still, sadly, true.

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