Nuclei with quadrupolar moment, quadrupolar interaction, 23Na MRI

0 0 391
answers votes views
Hello! I'd like to understand the application of quadrupolar effects in MRI. I read different materials on this topic b...
Posted: Philipp Barrett 1 Apr 01 at 13:01

NMR INTENSITY AND CONTACT TIME CP

0 0 440
answers votes views
What is the shape of the graph between intensity and contact time for different spin rate in CP? ...
Posted: sreenath K 1 Mar 26 at 05:32

dipolar coupling in nmr

0 0 467
answers votes views
how can i understand the effect of dipolar coupling in cp spectrum? ...
Posted: sreenath K 1 Mar 23 at 09:52

cp nmr graph for intensity vs contact time

0 0 635
answers votes views
i got a sinusoidal graph for intensity vs contact time graph in CP.how can explain the theory behind this? ...
Posted: sreenath K 1 Mar 21 at 22:06

2D-STD experiment

0 0 802
answers votes views
Can anybody provide parameter file for running 2 D STD 1H 13C HSQC on bruker 600 MHz instrument. ...
Posted: ASMA AZIEZ 1 Feb 24 at 23:28

ROESY NMR in Bruker

1 0 820
answers votes views
Since ROESY uses a cw spin-lock, is it safe to set up a mixing time of 500ms? If I want a roesy spin-lock strength of 2....
Posted: visi 1 / Updated: Pete Gierth 401 Mar 30 at 03:32

Why SR(F1) in hcchtocsy and h(cc)(co)nh?

0 0 138
answers votes views
Hi,All, I wonder if somebody can tell me why in these two experiments( also hbha(co)nh,I think) in Bruker(not sure if yo...
Updated: blue 1 Feb 28 at 08:37

eightfold suppression of water and ethanol

0 0 273
answers votes views
Hi, I'm trying to perform an NOESYGPPS 1D 1H NMR experiment to suppress water and the ethanol signals in a wine sample, ...
Updated: Calin Floare 1 Feb 06 at 05:15

Why is the T1 relaxation time of protons shorter than for other nuclei?

0 0 1k
answers votes views
So I think this could be asked in my oral exam. Why are the T1 relaxation times in NMR spectroscopy shorter than those o...
Posted: NMR Dummy 1 Jan 25 at 09:56

interleaved acquisitionon Bruker NMR

2 0 1k
answers votes views
Our group just transfered from Varian to Bruker NMR, and we have a problem. Since my sample is unstable, when thereis a ...
Posted: nmr1novice 1 / Updated: Debashish Sahu 1 Feb 16 at 14:27

help understanding varian command

1 0 341
answers votes views
can someone4 explain how the tssub command works. For example, for phi4[1] = {1} ; settable(t4, 1, phi4) ; what does...
Posted: kaustubh sinha 1 / Updated: Ulrich Haunz 210 Mar 02 at 02:12

Effect of components of B1 field

0 0 489
answers votes views
Considering the B0 field is along Z direction if and B1 is applied in the XY plane. What will be the effect on SNR of an...
Posted: Divine Demon 1 Dec 06 '16 at 04:05

Protein Backbone assignment

1 0 1k
answers votes views
There are many Software Tools available for that purpose. What are the problems there (if there are some)? Do you think...
Updated: FAS 1 Dec 08 '16 at 07:53

Backbone assignment with NMRPipe

1 0 556
answers votes views
Hi I'm new to nmrPipe and I have a question about where to start assigning the backbone resonances for a recombinant pro...
Posted: David Onofrei 3 / Updated: Woonghee 26 Nov 28 '16 at 16:37

How to implement receiver phase toggle in XWINNMR?

1 0 1k
answers votes views
How does one change the receiver phase DURING stroboscopic acquisition in XWINNMR? The "ipp" commands do not seem to wor...
Updated: forza 1 Nov 10 '16 at 10:22

Lock problem on Bruker Avance 600 MHz

0 0 475
answers votes views
After a energy failure (cryoprobe started to warm up) I cannot establish lock (similar to http://qa.nmrwiki.org/question...
Posted: Fabio de Moraes 1 Oct 31 '16 at 05:58

NOE and strength of dipolar coupling

1 0 427
answers votes views
Is NOE observed even if molecular motion averages out the dipolar coupling between two spins. ...
Posted: visi 1 / Updated: Kirk Marat 711 Oct 26 '16 at 15:01

qNMR calculation

1 0 1k
answers votes views
I am currently working on the qNMR concentration of compounds X in commercial samples: The following is my scenario I...
Posted: KONG KA LING 1 / Updated: Ulrich Haunz 210 Oct 13 '16 at 06:38

Vnmr spectrum file

1 0 1k
answers votes views
Hi, I am working on software for NMR assignment and one of the options to implement is import Varian spectra into our ap...
Posted: _mtd_ 1 / Updated: Ulrich Haunz 210 Sep 19 '16 at 06:59

unresolved signals

0 0 957
answers votes views
Hi all We know that H NMR of paramagnetic sample or complex, is very broad with a bad signal to noise ratio. Do you...
Posted: satar 3 / Updated: Ulrich Haunz 210 Sep 19 '16 at 06:51

FILTERATION OF SAMPLE

1 0 1k
answers votes views
Hello all, can i filter sample by passing the sample through a cotton? I think may be some of compound in cotton dis...
Posted: satar 3 / Updated: Ulrich Haunz 210 Sep 12 '16 at 05:56

2D-NOESY for macromolecules

0 0 1k
answers votes views
Hi, NOESY is very interesting method bet I have a problem. We are working with polymethacryles (MW about 20 000-30 000 ...
Posted: AnnaLT 1 Aug 24 '16 at 22:32

What do -di and -verb do?

1 0 588
answers votes views
Hi all, New to NMRPipe. I'm trying to understand what the arguments -di and -verb to, e.g. in |nmrPipe -fn PS -p0 66.0...
Posted: Lena 1 / Updated: Kirk Marat 711 Sep 06 '16 at 11:23

HNCO projection of the 1H-15N plane

1 0 496
answers votes views
Dear all, If I make the projection of the 1H -15N plane from the HNCO and compare it to the HSQC of the same sample, the...
Posted: Angus 1 / Updated: Kirk Marat 711 Sep 06 '16 at 11:30

Relaxation rate of bulk (pure) water at high frequencies

1 0 575
answers votes views
Hi all, Does anyone know if NMR relaxation rates of bulk (pure) water has been measured experimentally at several hundr...
Posted: Gyro 1 / Updated: Jerry Hirschinger 199 Jul 21 '16 at 05:08

When to use 'BLKGRAD' and 'UNBLKGRAD' in a bruker pulse sequence ?

1 0 767
answers votes views
I'm trying to modify some pulse sequence on bruker 400, and is confused with the use of 'blkgrad' and 'unblkgrad'; and ,...
Posted: Yuan yaping 1 / Updated: Kirk Marat 711 Jun 14 '16 at 11:44

Difference between H 50 W and X 100 W Amplifiers

2 0 604
answers votes views
We have been trying to get a 2D H-F experiment to work using the X 100 W amplifier on our Bruker NMR, but can't get it t...
Posted: ysuh 1 / Updated: Kirk Marat 711 Jun 14 '16 at 11:55

2rr to ASCII

2 0 972
answers votes views
Hi All, I was wondering if there is a simple way for converting 2rr to ASCII format (with Origin?). I don't know if my ...
Posted: m 1 / Updated: Kirk Marat 711 Sep 28 '16 at 08:07

method validation in nmr

1 0 463
answers votes views
please tell me whether there are method validation in nmr ...
Posted: harish ravuri 1 / Updated: Ulrich Haunz 210 May 04 '16 at 01:31

Shimming for liquid stateNMR

1 0 489
answers votes views
Dear All, What should be the intesnities of spinning sides bands in liquid state NMR?. THank YOu ...
Posted: Mani 1 / Updated: Clemens Anklin 416 Nov 27 '15 at 11:26
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