AMX500/X32 graphics problem solved, pulse sequence needed

Kirk Marat (kirk_marat@umanitoba.ca)
Fri, 5 Nov 1999 14:44:28 -0600

Thanks to everyone who replied to my questions about a "flickering
pixel" problem that I was having on our AMX500/X32 in 2D mode. I got some
boards from Bruker and it turns out (as I more or less expected) that it was
the
graphics processor board. Apparently, this problem can be temperature
related, so CHECK THOSE FANS! The next thing I am going to try is
to kludge together a cable so that I can use as standard PC monitor
with the X32. I'll let everyone know how this turns out.

We have a user that would like to measure 15N transverse relaxation times
using a proton detected 2D type experiment. This seems to involve adding
a 15N CPMG or spin-lock sequence into an HMQC or HSQC type experiment.
The preferred method seems to be the spin lock (where they would actually
be measuring T1rho, rather than T2) as the CPMG duty cycle requirement
seems to be a bit too severe for many systems. The sequence would be
similar
to that described by Peng, Thanabal and Wagner in J. Magn. Reson. 95, 421
(1991).
Would anyone have such a sequence for an AMX system? Our new gradient
system
hasn't arrived yet, so it would have to be a non-gradient version, but I
could probably
translate an Avance version if necessary.

Thanks in advance!

-Kirk

Kirk Marat, Ph.D. NMR Facility Manager
Dept. of Chemistry and Prairie Regional NMR Centre
University of Manitoba
Winnipeg, Manitoba, R3T 2N2, CANADA
ph. (204) 474-6259 FAX (204) 474-7608
kirk_marat@umanitoba.ca

Boast and drive until you drop!