Changes

Relax disp.spin lock offset+field

30 bytes added, 11:49, 16 March 2014

Palmer, A.G. & Massi, F. (2006). Characterization of the dynamics of biomacromolecules using rotating-frame spin relaxation NMR spectroscopy. Chem. Rev. 106, 1700-1719 [http://dx.doi.org/10.1021/cr04042875 DOI]

[[File:Fig1 Palmer Massi 2006.png|thumb|center|upright=43|Try to reproduce Figure 1.]]

Figure produced with script [[Relax_disp.spin_lock_offset%2Bfield_figure | found here. ]]

offsets[ei][si][mi][oi] = frequency_to_rad_per_s(frq=cdp.spin_lock_offset[id], B0=frq, isotope=spin.isotope)

~~"""Convert the given frequency from ppm to rad/s units."""~~

~~return frq * 2.0 * pi * B0 / g1H * return_gyromagnetic_ratio(isotope) * 1e-6~~

</source>

=== spin lock field ===

The spin lock field strength is noted '''$\nu_1$'''.<br>

The [[wikipedia:Chemical_shift | Chemical Shifts]] $\delta$ in ppm for nuclei of interest (ex. $^{15}$N and which have been loaded in with relax function [http://www.nmr-relax.com/manual/chemical_shift_read.html chemical_shift_read] from a [http://www.nmr-relax.com/manual/spectrum_read_intensities.html peak list formatted file]) is first converted toto the rad/s with the following function calls.<source lang="python">shifts[ei][si][mi] = frequency_to_rad_per_s(frq=shift, B0=frq, isotope=spin.isotope)</source>

=== The trouble ===

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