Predicting aquisition time needed depending on sample concentration

1 0 606
answers votes views
Hi , is there a way of predicting aquisition time needed depending on sample concentration in order to get a decent spe...
Posted: gravatar 49 / Updated: Ulrich Haunz 177 20 mins ago

bigger MAS-NMR spectrum as irradiation window

0 0 236
answers votes views
Hi, I have a sample with a very very big CSA which is broader than my irradiation windows, so I have to acquire my dat...
Posted: Thiazole 1 Dec 16 at 13:05

J-value command

2 0 44
answers votes views
Hi I have a 500MHz BRUKER NMR. How I can access to J-value at COSY experiment? what's that command? ...
Posted: Saeed 1 / Updated: PQdotL 1 Dec 16 at 16:12

problem with large dosy files

2 0 69
answers votes views
Hello, I run DOSY expt successfully but my dosy files are very massive and they take up large amounts of disk space. Ho...
Posted: elham 3 / Updated: Arkadiusz Leniak 162 Dec 15 at 13:42

Topspin: usage of l0 and d0

2 0 78
answers votes views
Dear all, In topspin, what's the initial value for l0, 0 or 1? what's the initial value for d0, 0 or in0? Thanks in ad...
Updated: Frey 61 Dec 12 at 01:14

1H-15N CSP

0 0 60
answers votes views
I have a basic question. Why or when should one use deviation from average chemical shift change rather than absolute va...
Posted: Mahavir Singh 1 Nov 27 at 05:10

1H-15N HMBC of small molecules

1 0 88
answers votes views
When I used the automatic peak picking function of Topspin for picking the cross peaks in a 1H-15N HMBC spectrum, two cr...
Updated: Bhanu 1 Nov 27 at 20:23

Running a wet sequence

2 0 82
answers votes views
Hi, I am trying to run a wet sequence but I'm having trouble getting good results on a sample with 90:10 water:methanol...
Posted: gravatar 49 / Updated: Pete Gierth 366 Dec 05 at 10:35

coupling constants

3 0 107
answers votes views
Hi, does anybody know 1H-79Br coupling constants? I found in literature only 13C-79Br coupling constants! Thank you, Mar...
Posted: gugica 1 / Updated: Arkadiusz Leniak 162 Dec 07 at 02:28

What is the actual point of dummy scans?

3 0 179
answers votes views
Hi, I was wondering why so many pulse programs use dummy scans. Correct me if I'm wrong but I think dummy scans are supp...
Posted: gravatar 49 / Updated: Pete Gierth 366 Dec 05 at 10:44

Frequency of signal in the second dymension

0 0 2k
answers votes views
Let me consider a proton experiment done on a 500 MHz spectrometer. The signal coming from the sample has a frequency of...
Posted: PQdotL 1 / Updated: dstephenson 56 Dec 16 at 06:27

Inverse FT of NUS data

3 0 138
answers votes views
Does anyone know the way to create a full ser file from Bruker NUS processed data? I want to do this so that others (wi...
Posted: John Hollerton 96 / Updated: Pete Gierth 366 Dec 05 at 11:19

BSMS error message

3 0 151
answers votes views
Hi what is the HOLD LOCK message on BSMS key pad? How can I fix it? Thanks ...
Posted: elham 3 / Updated: Arkadiusz Leniak 162 Nov 16 at 18:18

Weak NOE signals, serious t1 noise

5 0 225
answers votes views
Since my university does not have a professional spectroscopist, I am a new learner of NMR, and I really have no one els...
Posted: Elvis 1 / Updated: RuudA 11 Nov 02 at 07:22

Why so much spam?

3 2 182
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 49 / Updated: Ulrich Haunz 177 Oct 24 at 07:09

19F 2D experiments

3 0 192
answers votes views
Hi, I would like to run some 19F NOESY, and 19F-1H correlation experiments on a totally fluorinated sample (no H) with a...
Posted: AnneBaudouin 1 / Updated: RuudA 11 Nov 02 at 07:44

NH---O hydrgen bond detection in N-(2-methoxyphenyl)benzamide

1 0 4k
answers votes views
I'd like to know if there are further NMR spectroscopic methods to detect NH---O hydrogen bond in N-(2-methoxyphenyl)ben...
Posted: Alessia 1 / Updated: Arkadiusz Leniak 162 Oct 24 at 00:48

topshim error 84

1 0 202
answers votes views
I tried to perform topshim on my AV-300 but it say : "BsmsRCBSlope - setting RCB ramp failed - Error 84:BSMSExcessive Co...
Posted: Bourdreux Flavien 1 / Updated: Kirk Marat 686 Oct 14 at 14:28

Measuring T1 for a low concentration (1mM) compound in water.

1 0 1k
answers votes views
Hi, I'm trying to measure T1 for a compund at 1mM in water using t1ir. Seeing how my concentration is so low, phasing m...
Posted: gravatar 49 / Updated: Ulrich Haunz 177 Oct 23 at 08:39

TOCSY of peptide in micelle

0 0 1k
answers votes views
Hi, I am a PhD student starting in NMR and I have two questions. I have a problem with a TOCSY and natural abundance ...
Updated: paul atray 1 Sep 17 at 10:16

au for 1H and 31P with iexpno and ssleep for kinetics

1 0 498
answers votes views
hi there. I want to establish an au with the following content: I want to measure 1H and 31P make ssleep (userdefined)...
Posted: charlez miller 1 / Updated: Ulrich Haunz 177 Sep 22 at 06:25

setting Z0 on agilent nmr equipment

0 0 178
answers votes views
I use an agilent 400 MHz equipment. Would like to know how to set the Z0 to around -3500 ...
Posted: olatomide fadare 1 Sep 11 at 16:15

polymer NMR

1 0 717
answers votes views
Why are NMR peaks of flexible polymers usually broad? Is it due to the intramolecular proton J coupling among different ...
Posted: timlo 1 / Updated: Arkadiusz Leniak 162 Sep 09 at 10:05

Which Bruker HSQC program do you use?

5 0 781
answers votes views
Hello, could you tell me which HSQC and E-HSQC program are recommendable ? These are Bruker HSQC pulse programs: hsqcp...
Posted: lithiumamide 1 / Updated: RuudA 11 Sep 10 at 11:46

Oxford Instruments 2.2K 800/63 pumped magnet

1 0 657
answers votes views
Dear all, our Oxford 800 Mhz pumped magnet is monitored using a windows 95 pc. The autodial is still running but we wer...
Posted: Ruud 1 / Updated: RuudA 11 Sep 25 at 03:37

Spam that is lately spawning in wiki

2 3 637
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 162 Sep 23 at 13:08

Tool for Subsampling Uniformly-Acquired Data to Mimic NUS Spectra

1 0 4k
answers votes views
Hello all, I have several 2D and 3D data sets acquired using Bruker spectrometers in the standard uniform sampling fash...
Updated: ChemMJW 99 Aug 23 at 20:43

what does autoshim in the topspin bsms do?

1 0 435
answers votes views
Hi, in the bsms gui there's an autoshim button. What does this function do exactly? Is it similar to topshim or is it a...
Posted: gravatar 49 / Updated: Ulrich Haunz 177 Aug 20 at 06:16

Tool to extract several NMR spectra into text file format?

2 0 345
answers votes views
Hi As a newbie in the NMR world I hope you guys can help me out with a simple Q: I have 104 1D spectra I would like to t...
Posted: Michael 1 / Updated: John Hollerton 96 Sep 10 at 03:36

15N 90 degree hard pulse calibration

4 0 11331
answers votes views
Greetings, I want to ask for some advice in matter of 15N hard pulse calibration on Bruker machines. I'm working on Avan...
Updated: Arkadiusz Leniak 162 Aug 25 at 04:18
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