HNCO projection of the 1H-15N plane

0 0 9
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 yesterday

Relaxation rate of bulk (pure) water at high frequencies

1 0 48
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 189 Jul 21 at 05:08

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

1 0 267
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 701 Jun 14 at 11:44

Difference between H 50 W and X 100 W Amplifiers

2 0 222
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 701 Jun 14 at 11:55

2rr to ASCII

1 0 470
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: Ulrich Haunz 185 May 04 at 01:43

method validation in nmr

1 0 185
answers votes views
please tell me whether there are method validation in nmr ...
Posted: harish ravuri 1 / Updated: Ulrich Haunz 185 May 04 at 01:31

Shimming for liquid stateNMR

1 0 213
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 0 151
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 0 193
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 0 243
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 0 173
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 0 313
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 0 156
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 0 306
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 72
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 0 213
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 94
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 0 293
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?

0 0 274
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 Aug 28 '15 at 18:26

C-C coupling constants measurement

0 0 307
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 0 341
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 0 370
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 0 374
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 0 236
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 0 471
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 0 256
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 0 774
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

What do you call this sequence

0 0 418
answers votes views
I'm looking for the name of this sequence. It's a bit like the 1H portion of INEPT, but its purpose is not to transfer ...
Updated: clemistry 1 May 15 '15 at 10:36

Bruker phase image recon

0 0 961
answers votes views
Hi all- I'm acquiring 1-2s/dynamic, single-slice gradient echo image series over a period of 10 minutes or so. By defau...
Posted: Nicholas E 11 Apr 17 '15 at 08:35

dept nuclear magnetic resonance

1 0 629
answers votes views
what it the difference between c13 and dept nmr? ...
Posted: dereje sharew 1 / Updated: gravatar 83 Apr 28 '15 at 02:51

Bruker AV500 TOPSHIM error

1 0 670
answers votes views
Hi, I'm having a problem with topshim on Bruker AV 500 using topspin 2.1. it finishes with error (topshim: FieldMap - no...
Posted: jrlopez 1 / Updated: Jim Lin 1 Apr 14 '15 at 06:23

nmr phenylethylamine

2 0 816
answers votes views
hello...i know only the basics on nmr and need some help :i need H-NMR help with phenylethylamine Phe-CH2-CH2-NH-R - how...
Posted: ann choroshun 1 / Updated: Jim Lin 1 Apr 09 '15 at 07:59

Distorted/antiphase signals when doing Dosy

5 0 682
answers votes views
Hello, I am running Dosy experiment using ledbpgp2s sequence. I am getting sort of signal distortions. I tried the solu...
Posted: Umayal Rakesh 1 / Updated: gravatar 83 Jun 08 '15 at 03:44

31P-31P COSY

1 0 722
answers votes views
I like to run a 31P-31P COSY experiment to determine whether there is coupling between 1R-31P-CH2-31P-X in my molecule. ...
Updated: Jim Lin 1 Apr 09 '15 at 07:54

splitting QCPMG echo train

0 0 311
answers votes views
Hi all, I'm running qcpmg (qcpmgaq), using bruker topspin3. Does anyone have a suggestion how to split the echos train? ...
Posted: shon roni 1 Mar 23 '15 at 04:07

How to calcualte eoors in ppm from Hz of Hsqc data?

1 0 472
answers votes views
Hi all, I want to calculate error in ppm from my Hsqc data. My spectrometer yields X1axis, Y1Axis, DX1, DY1, X1ppm, and ...
Posted: ick lad 1 / Updated: Arkadiusz Leniak 238 Mar 17 '15 at 02:10

Why NMR can deliver angstrom reolution structures.

1 0 455
answers votes views
How can NMR operating at radiofrequency wavelengths deliver angstrom resolution? For example X-ray crystallography opera...
Posted: Anon 1 / Updated: Arkadiusz Leniak 238 Mar 17 '15 at 01:10

Absence of some signals on 1H and 13C spectra of polyaromatic carboximidate

3 0 1k
answers votes views
Hi, I have encountered a strange behaviour of some signals (they are absent) in a series of polycyclic aromatic carboxi...
Posted: Arkadiusz Leniak 238 / Updated: zablociak 21 Mar 23 '15 at 12:11

reading Bruker phase data

1 0 459
answers votes views
Hi all, I'm having trouble reading the 2dseq file for a scan I ran. It should contain 2 slices of 66x50 voxels, repeate...
Updated: Nicholas E 11 Mar 13 '15 at 10:53

WaterLOGSY pulse program for bruker

1 0 1k
answers votes views
Hello, I was wondering if there was a waterLOGSY sequence among the bruker sequences. If not, could someone tell me whe...
Posted: gravatar 83 / Updated: Arkadiusz Leniak 238 Mar 17 '15 at 08:09

OH, NH, SH Labile protons in water nmr

1 0 1k
answers votes views
Hello all, Just to mirror Craig Grimmer's question about labile protons in non-aqueous solvents, does anyone know of an...
Posted: gravatar 83 / Updated: Arkadiusz Leniak 238 Mar 14 '15 at 11:24

Mechanism of chemical exchange between labile protons (OH, NH, SH)

1 0 659
answers votes views
Hello All Does anyone know of any good articles dealing with the mechanisms of labile proton exchange in non-aqueous so...
Posted: Craig 41 / Updated: gravatar 83 Mar 09 '15 at 02:28

Topshim error

2 0 962
answers votes views
HELLO all nmr wikier,I am facing problem in runing topshim on bruker 500Mhz using topspin 2.1 it finishes with error (fi...
Posted: feroon 21 / Updated: Jim Lin 1 Mar 31 '15 at 06:19

noisy hmqc and hmbc spectra

2 0 782
answers votes views
Hey all! We've got a serious problem because with our new probe (5mm bbo bruker) the t1 noise in the heteronuclear corr...
Posted: apophis 1 / Updated: Pete Gierth 401 Feb 25 '15 at 14:06

Choice of relaxation delay time (d1) in 2D experiments.

1 0 704
answers votes views
Hi, Most people tend to use a lower d1 for 2D than for 1D. Help me understand why. Furthermore, supposing you know you...
Updated: gravatar 83 Mar 09 '15 at 02:21

log: Failed to find Z0 - low s/n

2 0 576
answers votes views
Hi, everybody! I met a problem on Varian 400 MR: DMSO samples don't lock by "find Z0" button, but I can find lock signal...
Posted: Ilya N 1 / Updated: Ulrich Haunz 185 Mar 09 '15 at 09:18

Coherence transfer pathway for Magic sandwich echo

0 0 786
answers votes views
Hi, I am writing the pulse sequence for magic sandwich echo*, but I am stuck with the phase cycle since I don't have a ...
Updated: Traveller 1 Feb 15 '15 at 15:59

Any decent nmr processing software for free?

5 0 1k
answers votes views
Hello people, Does anyone know of any free NMR software (no trials, I can't stand it anymore) that is robust enough to ...
Posted: gravatar 83 / Updated: Craig 41 Mar 05 '15 at 01:45

Parameters for zgesfpgp 1d experiment (flipback watergate) on Bruker

1 0 702
answers votes views
Hi , Does any one know how to set up the zgesfpgp 1d experiment (flipback water gate) on Bruker. I am looking for p29 du...
Posted: sri 71 / Updated: Clemens Anklin 416 Mar 03 '15 at 20:41

building chains of resonance groups from connectivities

0 0 323
answers votes views
Greetings, Given a dictionary of connectivities of the following form: residue i -> possible residues i-1 : 54 -&g...
Posted: Thomas 1 Feb 07 '15 at 11:36
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