Hi Mark, Note that your message missed the mailing list - but for reference it can be found below. Another post you might be interested in is:
https://mail.gna.org/public/relax-devel/2007-06/msg00012.html, or at http://thread.gmane.org/gmane.science.nmr.relax.devel/1023/focus=1034 for a better threaded view. This is from the relax-devel _att_ gna.org mailing list (http://www.nmr-relax.com/communication.html#relax-devel). In this message I derived the units for the dipolar and CSA constants as well as the relaxation rates and spectral density functions using unit analysis. It also states the differences between the SI and CGS unit systems. But from this unit analysis, you will see how you can perform such an analysis yourself to pull out the hidden radian units whenever you wish for which ever set of equations you are interested in. Regards, Edward On 24 August 2013 01:17, M.J. Bostock <[email protected]> wrote: > Dear Edward, > > Many thanks for your reply and for clarifying the mysterious rad term in the > units. I had wondered about missing radian terms in some other cases in the > past so it is very useful to read about this. > > I was also confused by the 'exp.1' prior to the units as this also doesn't > appear in the R2 column, only Rex. Maybe it just means extracted from > experimental data. > > Many thanks again, > > Mark > > > On Aug 23 2013, Edward d'Auvergne wrote: > >> Dear Mark, >> >> To understand these radian units, I would recommend that you read the >> following article that I wrote: >> >> http://wiki.nmr-relax.com/Hidden_radian_units >> >> This will help you understand that Rex, R2, R1, etc. are all units of >> rad/s, and why this is often written only as 1/s (and not Hz). Note >> that Michael Bieri added a version of this document to the NESSY help >> system. I would also highly recommend that you have a look at table >> 10.1 of the relax manual at: >> >> http://download.gna.org/relax/manual/relax_disp_manual.pdf >> >> This is the manual for a special branch of relax where relaxation >> dispersion is supported (this was started in 2009 by Sebastien Morin - >> and if you are not aware of relax, its website is at >> http://www.nmr-relax.com). You will see the relaxation dispersion >> parameters comprehensively listed with their units. In this table, >> none of the radian units have been hidden! >> >> Regards, >> >> Edward >> >> >> >> On 14 August 2013 17:12, Mark Bostock <[email protected]> wrote: >>> >>> In the output file from Nessy I am unsure what unit's are being used for >>> Rex. R2 (column 3) is given as s-1 whilst Rex (column 7) is given as >>> exp.1[rad/s]??? The magnitude of the values look like they are in terms of >>> s-1, however this doesn't seem to correlate with the labelling for this >>> column. >>> >>> Thanks, >>> >>> Mark. >>> >>> _______________________________________________ >>> Nessy-users mailing list >>> [email protected] >>> https://mail.gna.org/listinfo/nessy-users >> >> > _______________________________________________ Nessy-users mailing list [email protected] https://mail.gna.org/listinfo/nessy-users
