Cross-relaxation spectroscopy

In Spectral Methods in Food Analysis (M.M. Mossoba, ed.), pp. 1-88. Dekker, New York. Eads, T.M. and Axelson, D.E. 1995. Nuclear cross relaxation spectroscopy and single point imaging measurements of solids and solidity in foods. In Magnetic Resonance in Food Science (P.S. Belton, F Delgadillo, A.M. Gil, and G.A. Webb, eds), pp. 230-242. Royal Society of Chemistry, Cambridge, UK. 

Two-dimensional cross-relaxation spectroscopy of small rigid molecule Cyclo(Pro-Gly)... 

High temperature versus low temperature cross-relaxation spectroscopy... 

Macura S, Huang Y, Suter D, Ernst RR (1981) Two-Dimensional Chemical Exchange and Cross-Relaxation Spectroscopy of Coupled Nuclear Spins. J Magn Reson 43 259... 

A study of maltodextrin and inulin gels was carried out by cross-relaxation spectroscopy, TIP (H) measurements, and a wideline separation experiment (WISE).132 During ageing, the amount of immobilized polymer increases owing to the formation of crystalline regions, but it is not associated with change in molecular mobility. Different kinetics were found for maltodextrin and inulin gels.132... 

Stephenson, D. Smith. J.A.S. Nitrogen-14 quadrupole cross-relaxation spectroscopy. Proc. Royal Soc. Lond. 1988. 416A, 149-178. 

S. Macura, Y. Huang, D. Suter, R.R. Ernst, Two-dimensional chemical exchange and cross-relaxation spectroscopy of coupled nuclear spins, J. Magn. Reson. 43 (1981) 259-281. 

Magnetization transfer (MT) or cross-relaxation spectroscopy, also termed Z-spectroscopy by Grad and Bryant (1990), has been extensively used to obtain information on the spectral Uneshape of protons in macromolecules as well as on relaxation in heterogeneous systems (Calucd and Forte 2009). A MT spectrum was obtained by performing saturation transfer (ST) experiments at many discrete frequencies and plotting the ratio of the steady-state water signal with and without RF saturation as a function of the saturation frequency offset. For spatially homogeneous samples,... 

Grad, J. and Bryant, R.G. 1990. Nuclear magnetic cross-relaxation spectroscopy. J. Magn. Reson. 90 1-8. 

Besides direct methods of detection, indirect NQR detection methods have also been developed. As a rule, they are used at low frequencies or in cases when the concentration of quadrupolar nuclei is not high, i.e. when the sensitivity of the direct methods is not sufficient. For most experiments, when using these methods, a constant magnetic field is needed. To apply these methods, it is necessary for the sample to have two spin systems connected by dipole-dipole interactions. Indirect methods can be conventionally divided into double-resonance techniques and the cross-relaxation spectroscopy method. 

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