From: AnGio' (andrea.giordano$##$mlib.cnr.it)
Date: Mon May 15 2000 - 06:17:23 EDT
Dear OrgLIST readers,
I've been asked by the list coordinator to summarize replies at my previous
post titled "NMR data processing software" dated 04 May 2000, so here it
is...I also want to indicate a NMR-related web sites which I think could be
of interest.
To those of you who may still not know, WIN-95/98 MestRe-C is a program
capable of processing NMR FIDs and it is freeware. The latest version is
2.2 and you can download it from here:
http:\\qobrue.usc.es\jsgroup\MestRe-C\MestRe-C.html
All is asked is to inform the authors that you use the software, and give
your feedback to support future developments.
Mr. Chapman, R. has indicated a tutorial guide concerning all topics from
treatment of FID signal to its conversion into spectrum using MestRe-C
program. The file is one large compressed Word document (you need WinZIP or
similar to decompress), which is actually very uncomfortable to handle, due
to its extreme lenght, about 20 Mb decompressed. Loading such file into
Word program is kind of frustrating, expecially on slow machines.
Thus I have edited this one large file and changed the format of all the
graphic images, plus added a cover. The entire document is now about 165
Kb, and it has been ZIP compressed into the file M-tutorial.zip, which can
be downloaded by anonymous ftp from helium.dq.fct.unl.pt. You need WinZIP
or similar to decompress.
Regarding my specific question about treatment of signal before FT is
applied, Mr. Carniaux, J.F. suggested the following:
" Generally before to go for the FT it's quiet a good idea to make an
exponential correction of the "crude" FID, for that (if you're using
MestRe) go through the menu "process" Appodize (or click onto ), and the
value commonly used are Lb=0.3 for an 1H and Lb=3 for a 13C. (which are the
value used into the automatic operation by the brucker sofware)
Some people also use a mix with the Laurentsian/Gaussian Lb -0.3 ; Gb 30
for 1H and Lb -3 Gb 30 for 13C, this will make the signal sharper....but
personally I'm very happy with the normal Lb 0.3 or 3."
Finally, www.nmr.de is a site dedicated to NMR worth of a visit, which is
remarkably rich in contents. Of interest the "Links" section, with some
database of NMR spectra which can be freely downloaded.
Best regards,
A. Giordano.
*********************************************************************
Andrea Giordano c/o tel. ICN: 06 - 90672-510/516
CNR- Ist. Chimica Nucleare fax. ICN: 06 - 90672512
Via Salaria km 29.300 C.P. 10 cell: 0349 - 7512467
00016 Monterotondo Stazione (Roma)
Italia
>> Happiness is easy <<
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