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shaped pulses calibration                
Contributor:zq
Date:2009-01-29

 




        Category:basic NMR



        how to calibrate the C channel shaped pulse
        Answers (0)
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effects of bubbles on shimmimg                
Contributor:ybwu
Date:2008-03-27

 




        Category:practical issues



        When there are bubbles in the nmr sample, it is really difficult to obtain good shimming. Why?
        Answers (0)
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zero-order vs first-order phase error                
Contributor:egarcia3
Date:2008-03-03

 




        Category:nmr2



        What is the difference between a zero-order and a first-order phase error?
        Answers (0)
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How to distinguish the bad shim?                
Contributor:Jia
Date:2008-03-02

 




        Category:nmr2



        Due to machine problem or personal bad shimming
        Answers (0)
  Reply



Quantum system under RF pulse                
Contributor:aringh
Date:2008-02-04

 




        Category:basic NMR



        Starting from the equilibrium of a two level system (slightly more population in the lower energy 
state), when we supply energy to the system in the form of RF radiation, the population of the 
higher energy state starts increasing. At some point of time the population difference gets 
inverted (pi pulse). How the population difference comes to normal if we continue supplying the 
energy for exactly double the time of that of a pi pulse?

        Answers (0)
  Reply



Unstable lock level                
Contributor:dmparish1
Date:2008-02-04

 




        Category:basic NMR



        My lock level seems to wander all over the place. This makes it impossible to use it for shimming. 
What am I doing wrong?

        Answers (1)
  Reply



Cryoprobe salt sensitivity                
Contributor:dmparish1
Date:2008-02-04

 




        Category:practical issues



        Why is a cryoprobe more sensitive to high salt levels in the sample than a conventional probe.
        Answers (0)
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Intensity vs. Volume                
Contributor:ybwu
Date:2008-02-04

 




        Category:practical issues



        which one is better to be used to convert NOE to distance?
        Answers (0)
  Reply



Zero quantum coherence under gradient                
Contributor:aringh
Date:2008-02-04

 




        Category:basic NMR



        Why zero quantum coherence, particularly for homonuclear spin system, is not dephased by a PF 
Gradient?

        Answers (0)
  Reply



Protein 3D structure prediction from sequence                
Contributor:kks5
Date:2008-02-04

 




        Category:Protein Structure



        How accurately we can predict the 3D protein structure or secondary structures from sequence.
        Answers (1)
  Reply



Which is better: XRAY vs NMR                
Contributor:kks5
Date:2008-02-04

 




        Category:Protein Structure



        Which method is good to study the protein structrue. Xray or NMR
        Answers (2)
  Reply



why is there less study on Oxygen NMR?                
Contributor:ybwu
Date:2008-02-04

 




        Category:basic NMR



        Oxygen is as important as carbon nitrogen and hydrogen in our bodies. But why is there much less 
NMR study on Oxygen?

        Answers (0)
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Shimming                
Contributor:zq
Date:2008-01-28

 




        Category:basic NMR



        My peaks aren’t symmetric. They all have a long decaying tail, a hump on the side, or are all 
split into doublets. What’s wrong?

        Answers (1)
  Reply



What is the best way to clean a NMR Tube?                
Contributor:egarcia3
Date:2008-01-07

 




        Category:NMR tube care



        http://www.wilmad-labglass.com/services/NMR_010.jsp
        Answers (0)
  Reply



What is the best way to seal a NMR tube?                
Contributor:egarcia3
Date:2008-01-07

 




        Category:NMR tube care



        http://www.wilmad-labglass.com/services/NMR_009.jsp
        Answers (0)
  Reply



RSS                
Contributor:sagarb
Date:2008-01-02

 




        Category:nmr2



        How to use RSS?
        Answers (1)
  Reply












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