Unanswered questions

question about NQR

4 0 5k
answers votes views
Hi.We have a 500MHz BRUKER AVANCE spectrometer.unfortunately its has been quenched.we have 3 probes:5mmQNP , 5mmBBI and ...
Posted: shokoufeh karimnia 1 / Updated: SankarampadiAravamudhan 91 Jun 04 '13 at 04:44

Avance III 400 NMR lift unresponsive... emergency air lift activiated

1 0 8k
answers votes views
Hi, I am unable to activate our lift on our avance III 400 NMR from BruKer The message is emergency air lift activated....
Posted: Tamara 1 / Updated: wilsonmv 1 May 27 '13 at 18:53

How to obtain a good COSY spectrum of a paramagnetic compound

1 0 4k
answers votes views
How to set up the experiment in order to obtain a good COSY spectrum of Cu(II) compound? I have tried to do it by just ...
Posted: Kiu Chor Sham 11 / Updated: sekhar Talluri 621 May 25 '13 at 12:57

Difference between 13C edited and 13C resolved NOESY

1 0 5k
answers votes views
Hii, I want to know the difference between 13C edited and 13C resolved NOESY and also tell me about the applicati...
Posted: ashu 1 / Updated: sekhar Talluri 621 May 25 '13 at 12:30

Calculating NOESY intensities from X-ray crystal structure

0 0 1k
answers votes views
Hi folks, Has anyone calculated NOESY intensities from a X-ray crystal structure? CORMA program calculates. But have an...
Posted: nmrspin 1 May 10 '13 at 11:39

sign up for NMR wiki

2 1 3k
answers votes views
Hi! I have a problem signing up at the NMR wiki. I am met with this screen. There is no user creation possibility. ...
Posted: Troels Linnet 21 / Updated: Evgeny Fadeev 5771 May 15 '13 at 18:21

what is hard and soft pulse and its usage

2 0 18273
answers votes views
what is hard and soft pulse and its usage ...
Posted: akkhi 1 / Updated: mirage 1 Apr 28 '13 at 05:43

how to simulate the impression of excitation of cpmg

0 0 2k
answers votes views
Hi? recently I try to use the bloch equation to simulate the magnetization M's variation, i used the perfect 90-degr...
Posted: da hsu 1 Apr 18 '13 at 18:51

problem in software

1 0 3k
answers votes views
Hi.we have a 500MHz AVANCE-bruker but unfortunatly it's has been quenched.our konsole has been off for about 6 month and...
Posted: shokoufeh karimnia 1 / Updated: John Hollerton 96 Apr 16 '13 at 07:57

How to implement phase cycles into Bruker pulse sequences

1 0 9k
answers votes views
Hi, I have been trying to implement some pulse sequences from literature into Bruker format. However, when it comes to t...
Posted: nmrman 1 / Updated: Jana 31 Apr 14 '13 at 21:11

WEFT water suppression on Varian?

1 0 5k
answers votes views
I am working with carbohydrates and in 1D NMR we have anomeric protons very close to the HOD peak, sometimes even right ...
Posted: ssvanleeuwen 1 / Updated: Bharathwaj 112 Apr 27 '13 at 08:32

How do you list H-bonds in pymol?

0 0 2k
answers votes views
Hi there, I am trying to compare the H-bonds in two NMR strcutures. So, I need to calculate H-bonds with a cutoff 2.5 ...
Updated: dummy2 1 Apr 05 '13 at 07:08

Bruker Minispec mq40. What is the daily check sample?

1 0 4k
answers votes views
Hello all, Our daily check sample for the Minispec mq40 has been decreased in volume due to probably evaporation!! An...
Posted: Amin os 43 / Updated: Xenia Tombokan 1 Apr 11 '13 at 08:43

Varian FIDs ordering: Inner and outer loop in the sequence(Rance-Kay & States)?

1 0 14476
answers votes views
Dear all, I am new to NMR and I have difficulty understanding the ordering of FIDs, e.g. if an experiment uses both Ran...
Updated: nmr2rmn 3 Mar 27 '13 at 02:12

Bruker & Varian phase correction parameters

4 0 7k
answers votes views
Hi, I am an undergraduate student who is doing a chemistry/computing project. I have chosen to write a simple C program...
Updated: Jean Davidson 1 Mar 30 '13 at 12:23

2D PSG Error

2 0 3k
answers votes views
I am trying to run a Ghsqc on a 400Mhz Varian NMR. Once I start the acquisition I get, PSG error "cant find W40_ASW8332....
Posted: pmbattles 1 / Updated: Andrew Fowler 96 Mar 26 '13 at 06:41

Gsim 2D transformation (TopSpin)

3 0 4k
answers votes views
Hello. Anybody can use Gsim for 2D liquid spectra transformation? I can not transform correctly the TopSpin .ser files....
Posted: Attila 1 / Updated: Ulrich Haunz 210 Mar 11 '13 at 01:51

1h detected 3d in solids

2 0 3k
answers votes views
I am trying to set up a 3d 1h detected exp in solid. working on 700 MHz spectrometer,with a 3.2 mm probe. normal zg on 1...
Posted: anupc 1 / Updated: sekhar Talluri 621 Apr 07 '13 at 11:38

Tilted counters in 2D spectrum

1 0 3k
answers votes views
Hi, I recently run 195Pt-1H HMBC from one platinum compound with phosphorous and methyl group, unfortunately the counte...
Posted: Hamidreza Samouei 11 / Updated: Ulrich Haunz 210 Feb 21 '13 at 01:31

NOE help, pulse shapes, pbox

1 0 4k
answers votes views
Ok, let's face it. I don't know what I'm doing. I'm a separations chemist running our NMR. sigh. Anyway, I have been co...
Posted: CaymanDave 11 / Updated: Ulrich Haunz 210 Feb 21 '13 at 01:41

Which minimum distance between two magnets?

4 0 9k
answers votes views
Dear all, how do you determine the minimum distance between two high-field magnets? Is it that their 5-gauss lines mus...
Posted: oxy 31 / Updated: John Hollerton 96 Apr 22 '13 at 05:56

spinning problem on varian probe

2 0 13997
answers votes views
We are using a Varian300autoSW probe, which had previously worked well with no problems spinning samples. We had switche...
Posted: quinn best 1 / Updated: Miguel 1 Feb 09 '18 at 06:48

topspin peak list file format

2 0 7k
answers votes views
I am trying to parse a "peaks" file (generated by topspin) and convert it from binary to ascii, but couldn't find its fi...
Posted: badgerNMR 1 / Updated: John Hollerton 96 Apr 16 '13 at 08:13

Error in intergration of NMR peaks

1 0 7k
answers votes views
I have a question regarding the quantification of the error in peak integrals due to noise. I have a series of spectra ...
Posted: Daan 11 / Updated: Jerry Hirschinger 199 Feb 18 '13 at 13:23

Relaxation time of adenine H2

1 0 3k
answers votes views
Could anyone tell the reason why adenine h2 has a longer T1 and T2 than the other prontons in nucleic acid? It would be ...
Updated: yuan 1 Jan 13 '13 at 22:36

What is the meaning behind coalescense of unequal population exchange

1 0 3k
answers votes views
Is is an average k? And how could we extract the k of forward and backward reaction? ...
Posted: Kiu Chor Sham 11 / Updated: Dmitry Mainichev 31 Jan 16 '13 at 19:53

Lock 'lost' on Bruker 400MHz NMR

1 1 10188
answers votes views
I had just finished refilling the nitrogen and powering up the NMR after the holiday shutdown and went through the norma...
Posted: Norman Chu 11 / Updated: Roja 26 Jan 07 '13 at 16:11

lose the lock

4 0 8k
answers votes views
Recently the TOPSPIN always popup a windows "L-TRX board overtemperature error occurs" Then the lock is lost, and the lo...
Updated: Roja 26 Jan 07 '13 at 15:58

NQR technique

3 0 4k
answers votes views
Hi.I would like to run NQR test.I have some questions about it.are there any machines for this technique?if yes,please t...
Posted: shideh bb 1 / Updated: Elena Kurenkova 1 Jun 10 '13 at 00:34

Diamagnetic contamination

0 0 1k
answers votes views
How to determine diamagnetic contamination in PRE experiments.In what extent it will effect the Gamma2 values? ...
Posted: Kris 11 Dec 14 '12 at 12:43
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