DOSY Experiments - Emory University

wrefpwr
wrefpwrf
power level for wrefshape (as given by Pbox)
fine power for wrefshape, by default 2048, needs optimization for
multiple solvent suppression with fixed wrefpw
gt2 gradient duration for the solvent suppression echo
gzlvl2 gradient power for the solvent suppression echo
alt_grd alternate gradient sign(s) on even transients (default = 'n')
sspul flag for a GRD-90-GRD homospoil block
gzlvlhs gradient level for sspul
hsgt gradient duration for sspul
probe_ stores the probe name used to acquire the dosy experiment
Processing Parameters:
determines the number of components to be used in fitting the
ncomp
signal decay in DOSY when dosyproc='discrete'.
nugflag
nugcal_[1-5]
dosyproc
dosybypoints
'n' uses simple mono- or multi-exponential fitting to estimate
diffusion coefficients
'y' uses a modified Stejskal-Tanner equation in which the exponent
is replaced by a power series.
a 5-membered parameter array summarizing the results of the
calibration of non-uniform field gradients. Used if nugflag='y',
requires a preliminary NUG-calibration by the Doneshot_nugmap
sequence. The values are taken from the probe file at the time of
the data acquisition
'discrete' - invokes monoexponential fitting with dosyfit if ncomp=1,
and multiexponential fitting with the external programme SPLMOD
if ncomp>1.
'continuous' invokes processing with the external programme
CONTIN and gives a continuous distribution in the diffusion
domain.
'n' divides the spectrum into individual peaks, creating one crosspeak
for each individual peak found in the 1D spectrum 'y' performs
a diffusion fit for every point in the displayed region of the spectrum
that lies above the selected threshold.
The water refocusing shape can be created/updated using the “Recreate water refocusing
shape” button (update_wrefshape macro).
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