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Bug reports / Re: Difficulties simulating ST2PT (Trosy Experiments)
« on: March 03, 2014, 02:35:37 PM »
Dear Prof. Levitt,
thank you very much for your quick reply.
I dissected the transfer and compared it with the S3CT-selection (Sorensen et al, 1997, JBioNMR 10, pp 181-186), which - I think - forms the basis of the ST-2PT block.
It turns out, that the only significant difference between both is an inverted phase (-y--> y) of the S-Spin (attached .nb).
Having looked at your papers, I checked the paper from Prof. Pervushin again, but they did not specify, whether pulse phases are 'mashine phases' or 'math rotation phases'. My guess (or hope) is, that as a consequence of the inverted sign of gamma_N, the specified -y-phase actually is a +y-phase in mathematical terms.
However, I looked at some other Trosy papers: some use the same phases as Prof. Pervushin. In others paper, phases are specified that would result in different semi-trosy transfer.
Can this be a matter of right- and left-handed axis system and their different implementation in Bruker and Varian?
Confusing...
Dominic
thank you very much for your quick reply.
I dissected the transfer and compared it with the S3CT-selection (Sorensen et al, 1997, JBioNMR 10, pp 181-186), which - I think - forms the basis of the ST-2PT block.
It turns out, that the only significant difference between both is an inverted phase (-y--> y) of the S-Spin (attached .nb).
Having looked at your papers, I checked the paper from Prof. Pervushin again, but they did not specify, whether pulse phases are 'mashine phases' or 'math rotation phases'. My guess (or hope) is, that as a consequence of the inverted sign of gamma_N, the specified -y-phase actually is a +y-phase in mathematical terms.
However, I looked at some other Trosy papers: some use the same phases as Prof. Pervushin. In others paper, phases are specified that would result in different semi-trosy transfer.
Can this be a matter of right- and left-handed axis system and their different implementation in Bruker and Varian?
Confusing...
Dominic