Unanswered questions

Predicting aquisition time needed depending on sample concentration

0 0 46
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 7 hours ago

bigger MAS-NMR spectrum as irradiation window

0 0 222
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 yesterday

J-value command

2 0 35
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 yesterday

problem with large dosy files

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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 2 days ago

Topspin: usage of l0 and d0

2 0 72
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 56
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 76
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 72
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 97
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 0 171
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
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