What do we exactly mean by "utilizing steady state polarization" to gain sensitivity in an experiment?...I know that steady state should be achieved before the start of acquisition which means, in a way, it is already being used for 1H,13C/15N(isn't it?)...I am lost in understanding this concept!...also, how/why does it differ in standard pulse sequences and spin state selective coherence transfer experiments?
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Analysis of sensitivity enhancement by dynamic nuclear polarization in solid-state NMR: a case study of functionalized mesoporous materials
From The DNP-NMR Blog:
Analysis of sensitivity enhancement by dynamic nuclear polarization in solid-state NMR: a case study of functionalized mesoporous materials
Kobayashi, T., et al., Analysis of sensitivity enhancement by dynamic nuclear polarization in solid-state NMR: a case study of functionalized mesoporous materials. Phys Chem Chem Phys, 2013. 15(15): p. 5553-62.
http://www.ncbi.nlm.nih.gov/pubmed/23459985
nmrlearner
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04-17-2013 08:15 PM
Analysis of sensitivity enhancement by dynamic nuclear polarization in solid-state NMR: a case study of functionalized mesoporous materials
From the The DNP-NMR Blog:
Analysis of sensitivity enhancement by dynamic nuclear polarization in solid-state NMR: a case study of functionalized mesoporous materials
Kobayashi, T., et al., Analysis of sensitivity enhancement by dynamic nuclear polarization in solid-state NMR: a case study of functionalized mesoporous materials. Phys Chem Chem Phys, 2013. 15(15): p. 5553-62.
http://www.ncbi.nlm.nih.gov/pubmed/23459985
nmrlearner
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04-15-2013 08:52 AM
[U. of Ottawa NMR Facility Blog] Receiver Gain and Signal-to-Noise Ratio
Receiver Gain and Signal-to-Noise Ratio
The signal-to-noise ratio in an NMR spectrum can be affected drastically the choice of the receiver gain setting, so care should be taken to set the receiver gain correctly for optimum results. At very low receiver gain settings, both the signal and the noise use only a fraction of the available digitization levels of the analog-to-digital concertor (ADC). As a result, the intensity of each point in the FID is represented with only a few possible values and the FID is "choppy". This is analogous to a black and white photograph being represented...
nmrlearner
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02-15-2013 04:27 AM
Dual-band Selective Double Cross Polarization for Heteronuclear Polarization Transfer between Dilute Spins in Solid-State MAS NMR
Dual-band Selective Double Cross Polarization for Heteronuclear Polarization Transfer between Dilute Spins in Solid-State MAS NMR
Publication year: 2012
Source:Journal of Magnetic Resonance</br>
Zhengfeng Zhang, Yimin Miao, Xiaoli Liu, Jun Yang, Conggang Li, Feng Deng, Riqiang Fu</br>
A sinusoidal modulation scheme is described for selective heteronuclear polarization transfer between two dilute spins in double cross polarization magic-angle-spinning nuclear magnetic resonance spectroscopy. During the second N->C cross polarization, the 13C RF amplitude is...
nmrlearner
Journal club
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03-09-2012 09:16 AM
Dual-band Selective Double Cross Polarization for Heteronuclear Polarization Transfer between Dilute Spins in Solid-State MAS NMR
Dual-band Selective Double Cross Polarization for Heteronuclear Polarization Transfer between Dilute Spins in Solid-State MAS NMR
Publication year: 2012
Source: Journal of Magnetic Resonance, Available online 5 March 2012</br>
Zhengfeng*Zhang, Yimin*Miao, Xiaoli*Liu, Jun*Yang, Conggang*Li, ...</br>
A sinusoidal modulation scheme is described for selective heteronuclear polarization transfer between two dilute spins in double cross polarization magic-angle-spinning nuclear magnetic resonance spectroscopy. During the second N->C cross polarization, theC RF amplitude is modulated...
Repetitive cross-polarization contacts via equilibration-re-equilibration of the proton bath: sensitivity enhancement for NMR of membrane proteins reconstituted in magnetically aligned bicelles
Repetitive cross-polarization contacts via equilibration-re-equilibration of the proton bath: sensitivity enhancement for NMR of membrane proteins reconstituted in magnetically aligned bicelles
Publication year: 2011
Source: Journal of Magnetic Resonance, In Press, Accepted Manuscript, Available online 2 July 2011</br>
Wenxing, Tang , Alexander A., Nevzorov</br>
Thermodynamic limit of magnetization corresponding to the intact proton bath often cannot be transferred in a single cross-polarization contact. This is mainly due to the finite ratio between the number densities of the high-...