Spam that is lately spawning in wiki

2 4 1k
answers votes views
Greetings, I want to ask if someone knows what's going on in here with this spam about FIFA, some online games, etc. ? ...
Updated: Arkadiusz Leniak 238 Sep 23 '14 at 13:08

VnmrJ 2.2D on Ubuntu 10.04

4 3 6k
answers votes views
Dear all, I was wondering whether someone managed to install the VnmrJ software of Varian (2.2 D) on a Ubuntu based sys...
Posted: Tom de Greef 31 / Updated: maxm00d 1 Nov 08 '12 at 05:24

Why is chemical shift range of 13C wider than of 1H nuclei?

6 3 15179
answers votes views
Why the chemical shift range of 1H nmr is ~20 ppm wheras for 13C nmr it is ~230 ppm? ...
Posted: sameer deka 31 / Updated: Yoan Monneau 136 Feb 15 '11 at 11:23

Why so much spam?

3 3 1k
answers votes views
Hi, I really like this forum and I am harrowed to see it so spammed. We should find a way to end this(maybe more admins...
Posted: gravatar 83 / Updated: Ulrich Haunz 210 Oct 24 '14 at 07:09

1H-31P Hetcore with Varian inova 500, How can it be possible?

4 2 6k
answers votes views
I use a varian inova 500 NMR machine. it has vnmrj 2.1B software. An auto-x pfg 500 Mhz probe and auto tuning unit also....
Posted: oksijen 26 / Updated: Ulrich Haunz 210 Apr 27 '10 at 00:34

calculating power level with stdisp

2 2 6k
answers votes views
For some reason the shape tool has some sort of glitch that I can't calculate a power level for a wurst 10 ms pulse 180 ...
Posted: roseyp 46 / Updated: djh 1 Aug 11 '11 at 04:14

Software to calculate chemical exchange lineshape

4 2 7k
answers votes views
Are there any modern programs (preferably freeware) that will simulate line broadening in the presence of exchange. Some...
Posted: dstephenson 56 / Updated: Jana 31 Apr 19 '13 at 21:47

Saturation Transfer Difference NMR with satxfer_dpfgse

1 2 6k
answers votes views
Can anybody provide parameter file for running 1 D STD saturation transfer difference experiment with DPFGSE sculpted so...
Posted: sns03003 26 / Updated: Evgeny Fadeev 5771 Feb 05 '10 at 08:21

What are the best recources for learning about and making shaped RF pulses?

1 2 4k
answers votes views
If someone knew nothing about shaped RF pulses for NMR - where would you suggest to look first to learn about them and t...
Posted: cdr 41 / Updated: sekhar Talluri 621 Feb 11 '10 at 11:36

ASCII to nmrPipe format conversion of 2D complex time domain data

1 2 4k
answers votes views
I have a 2D complex time domain set stored in ASCII format. I want to be able to process it using nmrPipe. Unfortunately...
Posted: hasancelik 48 / Updated: Evgeny Fadeev 5771 Dec 10 '09 at 07:01

Example of XPLOR NMR structure with unnatural custom residues

0 2 2k
answers votes views
Hi there! Could anyone share an example of NIH-XPLOR files for annealing of NMR structure with non-natural residues. May...
Updated: anita 31 Jan 19 '10 at 11:40

How to translate Bruker shaped pulse statements to Varian?

2 2 5k
answers votes views
I was wondering how to add a shaped-pulse to a standard fHSQC pulse program on a Varian? ...
Posted: dcapraro 21 / Updated: Evgeny Fadeev 5771 Mar 02 '10 at 08:15

gNhsqc_IPAP RDC data processing

3 2 4k
answers votes views
Does anyone know how, or have a resource that can assist me in processing data collected from this experiment? Thanks. ...
Posted: Elio Cino 31 / Updated: Evgeny Fadeev 5771 Mar 04 '10 at 07:28

Varian data storage: Float vs INT ?

3 2 3k
answers votes views
Hi Guys, I noticed that the Varian file format has a bit in the status code (a short value in the 32 byte header) which ...
Posted: j 131 / Updated: Evgeny Fadeev 5771 Mar 04 '10 at 12:43

How to fix error code 9 when running modelfree?

3 2 6k
answers votes views
Guys-has any one used fastMF program from Loria's group? I am getting an error message - "Error during input, file= 6mar...
Posted: Jeetender Chugh 31 / Updated: Daisuke Takahashi 1 Sep 08 '11 at 18:35

How to confirm structure of propane by NMR?

2 2 3k
answers votes views
I will really need your help. I am chemist working in the oil buisness and I am interesting is it possible to analyze pr...
Posted: Silvija 21 / Updated: ron daedalus 11 Apr 21 '10 at 09:18

BRUKER Fid data ordering

2 2 11781
answers votes views
Hi guys : This post is related to : qa.nmrwiki.org/question/83/where-to-find-technical-information-on-varian-and-bruke...
Updated: j 131 May 25 '10 at 11:45

How to create synthetic procpar files for VNMRJ?

2 2 5k
answers votes views
Hi guys : Im trying to make a procpar for an FID, I know most of the parameters of importance, and have the schema of th...
Posted: j 131 / Updated: David Horita 31 Nov 09 '12 at 06:43

What is the origin of positive and negative coupling constants in NMR?

1 2 17819
answers votes views
When positive and negative coupling constants occur in NMR? and why? What are the spin states of the nuclei and the bond...
Posted: Ligia 21 / Updated: sekhar Talluri 621 Jun 13 '10 at 05:47

Which Bruker HMBC program do you use?

7 2 7k
answers votes views
Hello, Here are Bruker hmbc pulse programs (produced by ls *hmbc*): hmbcacbigpl2ndqf hmbcacgplpqf hmbcetgpl2nd hm...
Posted: Evgeny Fadeev 5771 / Updated: Arkadiusz Leniak 238 May 31 '14 at 15:21

Problem reading and transforming vendor data using C++/Qt

3 2 11490
answers votes views
Hi, I am a German chemistry Bachelor student (beginning my Master studies in October) and as a spare-time hobby I would...
Updated: Pascal Fricke 236 Aug 04 '10 at 00:16

Bruker Avance pulse sequences - where to find if not in TopSpin?

2 2 34815
answers votes views
I used to use Varian Inova systems with BioPack all the time, and now I'm using a Bruker Avance-III system geared for Ch...
Posted: jkurutz 131 / Updated: Charlie Fry 91 Aug 08 '10 at 09:34

Chemical Potential By NMR

3 2 4k
answers votes views
New to NMR, but a coworker mentioned that it may be possible to obtain chemical potential for a solution (polymer in sol...
Posted: jclark419 21 / Updated: SankarampadiAravamudhan 91 Oct 13 '10 at 19:50

Correct mathematical formulas of the important window functions

3 2 4k
answers votes views
Hi, regarding my C++/Qt NMR processing application (see http://qa.nmrwiki.org/question/149/problem-reading-and-transfor...
Posted: Pascal Fricke 236 / Updated: SankarampadiAravamudhan 91 Oct 18 '10 at 00:09

Unexpected Echo intensity increase in DOSY

2 2 2k
answers votes views
Hi, I ran a typical dosy expt and got an unexpected increase on echo intensity in the begining of the array. The first ...
Posted: fid 139 / Updated: mikaelastewart 11 Jun 03 '13 at 09:14

Karma system blocking people out

1 2 1k
answers votes views
Hi, the karma system is probably a good thing for choosing who can moderate or so. But it is enoying starters a lot. As...
Posted: fid 139 / Updated: Evgeny Fadeev 5771 Jul 12 '12 at 16:04

Concentration-dependent signal fine splitting

5 2 5k
answers votes views
Hi, I have synthesized coproporphyrin II tetramethyl ester and taken a 1H NMR in CDCl3: http://illumina-chemie.de/uplo...
Posted: Jan Hartmann 33 / Updated: Gareth Morris 71 Mar 19 '13 at 02:54

Software to create shaped pulse files from mathematical equation?

3 1 6k
answers votes views
I would like to create working shaped pulse files in one step starting from mathematical expressions - one for amplitude...
Posted: Evgeny Fadeev 5771 / Updated: joshua hicks 1 Apr 19 '11 at 07:34

useful commands in sparky

1 1 5k
answers votes views
I'd like to learn basic use of sparky, could you recommend something to start with? ...
Posted: Novelle 11 / Updated: Evgeny Fadeev 5771 Nov 18 '09 at 14:32

Acquiring at a receiver phase of 22.5 deegres from the y axis!

1 1 8k
answers votes views
I've been trying to find a way to acquire NMR data on a UnityPlus system with 20, 30 40 degrees and no the standard ones...
Posted: Federico del Rio 36 / Updated: Evgeny Fadeev 5771 Nov 18 '09 at 14:29

Select a reasonable NOESY mixing time given MW, B, viscosity?

2 1 6k
answers votes views
Is there a formula that would suggest a reasonable starting value for the mixing time based on the molecular weight, mag...
Updated: Evgeny Fadeev 5771 Feb 12 '10 at 12:32

Saturation transfer difference TROSY

1 1 8k
answers votes views
Has anyone added a pulse scheme for cross saturation to their TROSY for Bruker platform? Could you share a pulse sequen...
Posted: roseyp 46 / Updated: Jana 31 May 17 '13 at 22:46

Magnetic resonance energy units [closed]

1 1 3k
answers votes views
What is the energy difference between the anti-parallel and parallel states of the hydrogen nucleus in a 1.5T and a 3T m...
Posted: Grum 16 / Updated: Evgeny Fadeev 5771 Nov 18 '09 at 14:28

How to optimally choose a 1/4J 1H-15N delay for INEPT?

2 1 5k
answers votes views
Why is it often the case that when transferring magnetization from 1H to 15N, the 1/4J time is often a little less than ...
Posted: Scott Robson 156 / Updated: Evgeny Fadeev 5771 Apr 14 '10 at 16:33

What is the correct way to label a multiplet?

1 1 11565
answers votes views
Hi, I am puzzled with a determination of multiplicity of a spectrum. When to use abreviation m? And how to cut a bunch o...
Posted: rusta 16 / Updated: Evgeny Fadeev 5771 Jan 18 '10 at 21:20

finding sample data for practicing 2D 1H assignment

2 1 4k
answers votes views
as I have already started to assign a small peptide, I need sample data set for practicing 2d h1 assignment, could you p...
Posted: niloofar niknam 26 / Updated: jkurutz 131 Dec 15 '09 at 05:00

Please suggest model proteins and peptides for NMR

2 1 4k
answers votes views
do you know any model proteins except lysozyme suitable for nmr experiments? ...
Posted: niloofar niknam 26 / Updated: Markus Seeliger 11 Aug 17 '10 at 13:16

14N solid state NMR

4 1 5k
answers votes views
I would like to run some solid state 14N NMR spectra, but I have never run experiment on integer spins in the solid stat...
Posted: Anne Baudouin 36 / Updated: Joseph DiVerdi 146 May 31 '10 at 06:29

Diffusion constant range measurable by NMR?

1 1 3k
answers votes views
What is the range of diffusion constants accessible by PFG NMR methods? Could anyone provide specific examples for the ...
Posted: Evgeny Fadeev 5771 / Updated: Adolfo Botana 91 Nov 02 '09 at 07:31

Header for Varian fid file

3 1 7k
answers votes views
I have an fid file (for a 2D experiment) that I would like to process in vnmr. I am aware that an fid file requires a c...
Posted: KevinJD 16 / Updated: Evgeny Fadeev 5771 Jan 18 '10 at 11:25

Reduced dimensionality experiments in BioPack

1 1 5k
answers votes views
could anyone suggest pulse sequences that are available in Varian's BioPack that can be readily run in reduced-dimension...
Posted: Magnethead 42 / Updated: David Leonen 1 Apr 11 '10 at 22:26

A puzzle about NMRPipe COADD with -time option.

0 1 3k
answers votes views
... Following up on a previous question about processing interleaved gNhsqc_IPAP.c data where IP/AP is on the inner loop...
Updated: Evgeny Fadeev 5771 Jan 15 '10 at 16:49

Helium recovery system

2 1 5k
answers votes views
How do I configure a helium recovery system that won't perturb my magnet's stability? I'm concerned that just hooking ...
Posted: jkurutz 131 / Updated: Jerry Hirschinger 199 Jul 23 '14 at 10:45

1H-NMR-spektrum for CAS: 1792-81-0 HEEEELP

3 1 5k
answers votes views
I'm going to finish my repport for the school in a very few days, but I just can't finde a 1H-NMR-spektra for the molecy...
Posted: say 11 / Updated: Clemens Anklin 416 Dec 23 '09 at 14:58

Choice of method to calibrate decoupling pulse

1 1 5k
answers votes views
Book by Timothy Claridge "High-Resolution NMR Techniques in Organic Chemistry" recommends calibrating homonuclear decoup...
Posted: Evgeny Fadeev 5771 / Updated: Kirk Marat 711 Jan 06 '10 at 09:23

What happens if NMR probe is not perfectly tuned/matched?

2 1 5k
answers votes views
What may happen if probe tuning/matching is not perfect besides loss in the sensitivity, any more subtle details? Whoul...
Posted: Magnethead 42 / Updated: carl carter 21 Feb 22 '10 at 16:10

How to extract Bruker fid data - in topspin and xwinnmr - to ascii format?

4 1 17089
answers votes views
Hi and thanks for answering my prev. questions! Decided to ask this one: How can I convert fid data (ser file) to plain...
Posted: Magnethead 42 / Updated: Ulrich Haunz 210 Dec 04 '14 at 04:16

What may cause lock level depend on pfgon setting in vnmr?

2 1 4k
answers votes views
Hello, I've been working through the probe performance tests and noticed that when I change pfgon='yyy' to pfgon='nyn' l...
Posted: Evgeny Fadeev 5771 / Updated: Jerry Hirschinger 199 Sep 28 '10 at 12:12

Please suggest experiments that push the power limits of NMR probes

5 1 7k
answers votes views
I'm trying to come up with reasonable tests of probe performance for all channels by simulating conditions at which arci...
Posted: Evgeny Fadeev 5771 / Updated: SankarampadiAravamudhan 91 Oct 22 '10 at 01:56

NMR experiments to assign aromatic sidechains?

3 1 6k
answers votes views
Hello, may I ask this - NMR experiments/pulse sequences are available to assign aromatic sidechains - Phe, Tyr, Trp? We'...
Posted: anita 31 / Updated: roseyp 46 Feb 22 '11 at 09:38
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