15N-NMR chemical shifts comparison

0 0 110
answers votes views
I have a set of molecules with similar structure. The 1H-15N HMBC spectra of two of these molecules were taken in DMSO-d...
Posted: Bhanu 1 Jan 15 at 10:45

shape pulse power

0 0 61
answers votes views
can shape pulse power be in negative for example -1.98 for crp60comp.4 in dept-135 nmr experiment. ...
Posted: feroon 21 Dec 20 '17 at 09:51

13C-NMR with 31P coupling

0 0 592
answers votes views
Hello, I am the first time confronted with a 13C-NMR, in which a coupling between the 13C and 31-P cores takes place. I ...
Posted: Sabine Sun 1 Oct 21 '17 at 13:32

19F or 31P dosy

0 0 549
answers votes views
Hi, I have run 19F and 31P dosy using ledbpgg2s program from Bruker, I obtain good decreasing curves as expected, with u...
Posted: AnneBaudouin 1 Oct 17 '17 at 01:18

lock, gradient shimming and acquisition in vnmrj

0 0 672
answers votes views
Dear all, I want to write a macro that run lock, gradient shimming and acquisition in VnmrJ. I tried two ways, but fail...
Updated: Zhang 1 Sep 24 '17 at 18:43

NMR saturation

0 0 1k
answers votes views
My doubts are about NMR saturation. Saturation is caused by a continued impulse and cause the equalization in spin popol...
Posted: Youlsea 1 Aug 29 '17 at 08:11

Nuclei with quadrupolar moment, quadrupolar interaction, 23Na MRI

0 0 1k
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 '17 at 13:01

NMR INTENSITY AND CONTACT TIME CP

1 0 818
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 / Updated: Zhang 1 Sep 25 '17 at 21:36

dipolar coupling in nmr

0 0 855
answers votes views
how can i understand the effect of dipolar coupling in cp spectrum? ...
Posted: sreenath K 1 Mar 23 '17 at 09:52

cp nmr graph for intensity vs contact time

0 0 971
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 '17 at 22:06

2D-STD experiment

0 0 1k
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 '17 at 23:28

ROESY NMR in Bruker

1 0 1k
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 '17 at 03:32

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

0 0 407
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 '17 at 08:37

eightfold suppression of water and ethanol

0 0 617
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 '17 at 05:15

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

0 0 2k
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 '17 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 '17 at 14:27

help understanding varian command

2 0 721
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: Zhang 1 Sep 27 '17 at 03:23

Effect of components of B1 field

0 0 817
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 0 877
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 0 739
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 0 654
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 3k
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 1k
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 0 831
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 0 754
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
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