Nuclei with quadrupolar moment, quadrupolar interaction, 23Na MRI

0 0 641
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 0 484
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 0 506
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 0 694
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 0 839
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 0 967
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 0 170
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 0 326
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 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 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 0 383
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 0 525
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 0 581
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 0 510
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 0 448
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 0 987
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 0 609
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 0 525
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 0 599
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 0 809
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 0 616
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 1k
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 0 475
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 0 507
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

Amplitude problems when comparing 'popt' experiments in Bruker (Topspin)

0 0 385
answers votes views
Hi all, My question is about the Multiple Display (.md) function on TopSpin (Bruker AVIII). I did some 'popt' ( paramete...
Posted: TiagoB1 1 Nov 11 '15 at 03:40

1H 1D NMR data Normalization in Topspin.

1 0 578
answers votes views
I have performed a series of 1H 1D experiments with different concentration of peptide and accordingly different numbers...
Posted: RBT 1 / Updated: Pete Gierth 401 Nov 23 '15 at 11:14

Measurement of 13C enrichment

1 0 487
answers votes views
I am wondering, is it possible for me to measure 13C enrichment in my compound by using 1D 13C NMR spectrum? Id ran stan...
Posted: shuhaila 1 / Updated: Clemens Anklin 416 Oct 22 '15 at 14:04

NUS nmrPipe

0 0 353
answers votes views
Hi, I have recently written a 2D-HSQC pulse program (Echo-AntiEcho detection) which records non-uniformly sampled data ...
Updated: Zolo 1 Oct 20 '15 at 13:53

reversed NOESY/EXSY peaks

1 0 621
answers votes views
We have a case of a molecule that has two slowly exchanging conformations. In the NOESY experiment we see cross-relaxing...
Posted: foxx 1 / Updated: Pete Gierth 401 Nov 23 '15 at 11:26

probe temperature

0 0 276
answers votes views
Hi, If the probe temperature increases inadvertently What should be done to reduce the temperature. Thank you ...
Posted: sattar saberi 1 Oct 11 '15 at 11:30

Why does Lift not work?

0 0 449
answers votes views
Dear all, we have newly installed Bruker Ascend 600 with Sample Jet. Last month, we had a compressor error and NMR was o...
Updated: aaaeee 1 Oct 01 '15 at 08:20

with which program I can turn FID signal into sound?

0 0 178
answers votes views
Hi dear colleagues that was my question, thank you in advance! ...
Posted: IT 1 Sep 18 '15 at 04:01

Topspin AU program for sequencial acquisition of three different experiments for 2 hours

2 0 513
answers votes views
Dear all, I am trying to write an AU program for the acquisition of three different measurements in a sequence for 2 ho...
Updated: Umayal Rakesh 1 Sep 20 '15 at 20:19

prob not found

0 0 193
answers votes views
Hi Dear recently i see error the prob not found i do command "edhead" and then atmm and after that the problem be solved...
Posted: sattar saberi 1 Sep 15 '15 at 10:28

Splitting of amide peaks in indirect proton dimension of a 3D 15N Noesy spectra

0 0 379
answers votes views
Hello, I am trying to record 3D 15N Noesy-hsqc experiment on 15N labelled protein (50 a.a). The mixing time is 120 m...
Posted: Janeka 1 Aug 31 '15 at 10:09

NMRLab or matNMR for 1D nmr spectra processing?

1 0 811
answers votes views
Hi, I used to use spinworks to process simple 1D NMR (because it was easy and I didn't felt like paying for topspin). B...
Posted: joanap 1 / Updated: Kirk Marat 711 Sep 27 '16 at 07:21

C-C coupling constants measurement

0 0 421
answers votes views
Hello, I'm trying to set up an experiment to measure C-C coupling constants: 1. Do I understand it right that the standa...
Posted: Olga Mukhina 1 Aug 26 '15 at 13:12

How to edit format of Variables in NMRPipe?

0 0 451
answers votes views
Dear all, I would like to change the number of decimal place for the X and Y ppm values in nmrdraw (peak detection). The...
Posted: Jerry J 1 Aug 18 '15 at 14:37

Partially Parallel Imaging

0 0 487
answers votes views
I am running Paravision 4.0 from Topsin 1.5 with one receiver coil. I would like to increase the PPI acceleration factor...
Posted: adam 1 Jul 21 '15 at 05:18

Volume Integration 2D spectra

0 0 508
answers votes views
Hi, Can anyone enlighten me on the best way to calculate volume integration on 2D spectra (Bruker, Topspin). I have tri...
Posted: doodlebugs 1 Jul 06 '15 at 07:54

T2 relaxation in solids

0 0 347
answers votes views
Hi, While the T2 relaxation in liquids is connected with motional correlation time (tauc), what's the source of T2 rela...
Posted: Frey 61 Jun 14 '15 at 20:01

recovery of solvent NMR

1 0 656
answers votes views
Hi Do you confirm recovery of NMR solvents? Thanks ...
Updated: sattar saberi 1 Jun 14 '15 at 05:48

15N-proline site specific labeling

0 0 362
answers votes views
Can anyone share a protocol for site specific 15N-proline labeling of proteins? Would I need to supplement the media wit...
Posted: eliasjf 1 May 29 '15 at 11:44

Calculate the resonance frequency of hydrogen nucleus in an applied field of 2.4 T if ßN = 5.05 x 10-27 JT-1 and g = 5.585.

0 0 939
answers votes views
Calculate the resonance frequency of hydrogen nucleus in an applied field of 2.4 T if ßN = 5.05 x 10-27 JT-1 and g = 5.5...
Posted: mala ramanji 1 May 24 '15 at 06:24
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