Running a wet sequence

1 0 22
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: Arkadiusz Leniak 152 Nov 21 at 01:46

The application of aluminum hydroxide in the rubber industry?

1 0 1k
answers votes views
Aluminum hydroxide used in thermosetting plastics and thermoplastic plastics, synthetic rubber, paint and building mater...
Posted: zhenwei wu 1 / Updated: Arkadiusz Leniak 152 Nov 18 at 18:01

coupling constants

0 0 41
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 Nov 13 at 01:27

What is the actual point of dummy scans?

3 0 77
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: Arkadiusz Leniak 152 Nov 18 at 00:03

Frequency of signal in the second dymension

0 0 47
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 Nov 12 at 08:03

Inverse FT of NUS data

1 0 52
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: Ulrich Haunz 167 Nov 14 at 03:31

BSMS error message

3 0 89
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 152 Nov 16 at 18:18

Weak NOE signals, serious t1 noise

5 0 160
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 2 126
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 167 Oct 24 at 07:09

19F 2D experiments

3 0 141
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 152 Oct 24 at 00:48

topshim error 84

1 0 146
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 167 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 0 425
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 167 Sep 22 at 06:25

setting Z0 on agilent nmr equipment

0 0 150
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 0 496
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 152 Sep 09 at 10:05

Which Bruker HSQC program do you use?

5 0 675
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 0 590
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 3 536
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 152 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 0 352
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 167 Aug 20 at 06:16

Tool to extract several NMR spectra into text file format?

2 0 306
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 4k
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 152 Aug 25 at 04:18

vnmrj spectra in mnova

3 0 371
answers votes views
I have been trying to open varian vnmrj spectra in mnova software to workup the spectra, but I keep getting error messag...
Posted: Carolyn Shetter 1 / Updated: Ulrich Haunz 167 Aug 13 at 05:09

Topspin 2.1 error message with Windows 7 OS

3 0 726
answers votes views
Hi all, I have been running TopSpin 2.1 on my Windows 7 32-bit OS for the last few years and now am getting this annoyin...
Posted: Olivia 1 / Updated: Ulrich Haunz 167 Nov 14 at 03:16

why choloroform gives a negative triplet instead of a positive

3 0 4k
answers votes views
Hello, why choloroform gives a negative triplet instead of a positive(just one hydrogen on the carbon) in DEPT 135. Can ...
Updated: zikoooo 3 Jul 29 at 01:20

How to integrate CDCl3 (d-chloroform) peak area which is overlapped with other peaks?

4 0 2k
answers votes views
Hi All, I would like to get suggestion about how to integrate the peak area of CDCl3 which is overlapped with other pea...
Posted: Jiping Yang 1 / Updated: John Hollerton 96 Sep 10 at 03:53

Air dryer system issues

2 0 5k
answers votes views
We have a pressure-swing adsorption air dryer that is identical to the one shown here on the NMR wiki (Balston 75-20, cu...
Posted: slongwell 3 / Updated: Jerry Hirschinger 189 Jul 23 at 06:50

simple stddiff parameters

1 0 3k
answers votes views
Hi, I'm working on a bruker avance 400 spectrometer and using topspin version 1.3 software. I want to get a std-nmr (sat...
Updated: nfromdicle 1 Jul 12 at 05:56
581

questions

Newest questions are shown first.

Tags

× 60
× 32
× 25
× 18
× 17
× 17
× 13
× 11
× 11
× 10
× 10
× 9
× 8
× 8
× 6
× 6
× 6
× 5
× 5
× 4
× 4
× 4
× 4
× 4
× 3
× 3
× 3
× 3
× 3
× 3
× 2
× 2
× 2
× 2
× 2
× 2
× 2
× 2
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
× 1
posts per page103050

powered by CNPROG