High-resolution NMR field-cycling device for full-range relaxation and structural studies of biopolymers on a shared commercial instrument
High-resolution NMR field-cycling device for full-range relaxation and structural studies of biopolymers on a shared commercial instrument
Abstract Improvements are described in a shuttling field-cycling device (Redfield in Magn Reson Chem 41:753â??768, 2003), designed to allow widespread access to this useful technique by configuring it as a removable module to a commercial 500 MHz NMR instrument. The main improvements described here, leading to greater versatility, high reliability and simple construction, include: shuttling provided by a linear motor driven by an integrated-control...
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12-31-2011 10:40 AM
[Question from NMRWiki Q&A forum] poor signal to noise on 1H-15N heteronculear NOE
poor signal to noise on 1H-15N heteronculear NOE
I have recently attempted to run a 1H-15N heteronuclear NOE experiment in vnmrj (700 rt probe) using the standard sequence that comes with biopack, the signal to nose im getting compared to my standard HSQC is significantly reduced, is this normal? I do not recall this being the case when I ran this previously on a bruker 600 with RT probe? is this normal or does this suggest something is miss set? Also in the no NOE experiment I get very broad noise in the centre of my spectrum/water line.
regards
Tom
High resolution NMR spectroscopy of nanocrystalline proteins at ultra-high magnetic field
High resolution NMR spectroscopy of nanocrystalline proteins at ultra-high magnetic field
Abstract Magic-angle spinning (MAS) solid-state NMR (SSNMR) spectroscopy of uniformly-13C,15N labeled protein samples provides insight into atomic-resolution chemistry and structure. Data collection efficiency has advanced remarkably in the last decade; however, the study of larger proteins is still challenged by relatively low resolution in comparison to solution NMR. In this study, we present a systematic analysis of SSNMR protein spectra acquired at 11.7, 17.6 and 21.1 Tesla (1H frequencies of...
nmrlearner
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01-09-2011 12:46 PM
[NMR paper] High-resolution 31p field cycling NMR as a probe of phospholipid dynamics.
High-resolution 31p field cycling NMR as a probe of phospholipid dynamics.
Related Articles High-resolution 31p field cycling NMR as a probe of phospholipid dynamics.
J Am Chem Soc. 2004 Oct 27;126(42):13765-77
Authors: Roberts MF, Redfield AG
We have used high-resolution field-cycling 31P NMR spectroscopy to measure spin-lattice relaxation rates (R1 = 1/T1) of multicomponent phospholipid vesicle and micelle samples over a large field range, from 0.1 to 11.7 T. The shape of the curve for R1 as a function of field and a model-free analysis were...
nmrlearner
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11-24-2010 10:01 PM
[NMRwiki tweet] nmrwiki: Do you know how to create #NMR fids in raw format - either @bruker , varian
nmrwiki: Do you know how to create #NMR fids in raw format - either @bruker , varian or jeol? http://qa.nmrwiki.org/question/150/
nmrwiki: Do you know how to create #NMR fids in raw format - either @bruker , varian or jeol? http://qa.nmrwiki.org/question/150/
Source: NMRWiki tweets
nmrlearner
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08-22-2010 01:49 AM
[NMR analysis blog] Listening to NMR FIDs
Listening to NMR FIDs
http://1.bp.blogspot.com/_-MfflvAgRls/S1SiOdmRBMI/AAAAAAAAAk8/MKvZpYur7Sg/s400/loud-speaker-fid.jpg
About ten years ago I implemented a command in MestReC for the acoustic reproduction of an NMR FID. This was motivated by the suggestion of Javier Sardina and also after I found the Web page by Walter Bauer (an excellent musician by the way).
This feature was missing in Mnova which I think is a shame as in my opinion it is a very valuable educational tool. For example, it’s a beautiful way to show that measured NMR frequencies lie in the audio frequency region.
So I...
nmrlearner
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08-21-2010 09:12 PM
[Stan NMR blog] NMR tubes, or how to get poor very fast
NMR tubes, or how to get poor very fast
Comments about storing, cleaning and sealing of NMR spectroscopy sample tubes
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