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New NMR techniques are described for transferring transverse magnetization between scalar-coupled nuclei in the rotating frame. The methods involve simultaneous spin-locking of two selected spins A and X, using cosinusoidal modulation of the radio frequenc ...
Five different types of expt. are described which make it possible to measure various relaxation rates of selected protons in crowded spectra of macromols. such as proteins: longitudinal spin-lattice relaxation rates rt = 1/T1, transverse relaxation rates ...
Although molecular motions are responsible for many of the macroscopic properties observed in solids, especially in polymers, methods for studying these processes in all but the simplest systems are scarce. In the present study we introduce a three-dimensi ...
New exptl. methods are presented that allow one to measure cross-correlation between the fluctuations of dipolar interactions and chem. shift anisotropy (CSA) in scalar coupled systems with two and three spins I = 1/2 in isotropic soln. The methods involve ...
A theor. model is presented to account for the Fano-like interference lineshapes on multiphonon continua in the electronic spectrum of NO in rare-gas solids. The model is based on the coupling of the optical transitions to 1 single local mode, while the la ...
The difference between 1H NMR spectra obtained during eu- and hyperglycemia exhibited well-resolved glucose peaks between 3 and 4 ppm as demonstrated by comparison with solution spectra. Estimated increases were consistent with recent 13C NMR quantitations ...
Dipolar-coupled spectra of mols. dissolved in liq. cryst. solvents were analyzed by applying pattern recognition procedures to 2-dimensional z-filtered correlation spectra (z-COSY). Transitions that share common common energy levels can be recognized as su ...
For xenon atoms adsorbed in Na-A zeolite, electronic interactions cause shifts in NMR frequencies, resulting in a spectrum with discrete peaks from xenon atoms in cages with different xenon occupancies. Using two-dimensional exchange NMR, it is possible to ...
A novel technique is described that allows one to measure cross-relaxation rates (Overhauser effects) between 2 selected nuclei in high-resoln. NMR. The 2 chosen sites are irradiated simultaneously with the sidebands of an amplitude-modulated radiofrequenc ...
Computer-supported anal. of two-dimensional correlation spectra encounters a no. of obstacles which are due, in the simplest case, to insufficient digital resoln., and, in more severe cases, to fundamental ambiguities in multiplet patterns. Various strateg ...
