Showing papers by "Steffen J. Glaser published in 1996"
01 Jan 1996
TL;DR: In this paper, the homonuclear and heteronuclear Hartmann-Hahn transfer in isotropic liquids has been discussed and a robust multiple-pulse sequence has been developed.
Abstract: Publisher Summary This chapter discusses the homonuclear and heteronuclear Hartmann-Hahn transfer in isotropic liquids. Since the first description of the Hartmann-Hahn transfer in liquids, spectroscopists have been fascinated by this technique. Many theoretical and practical aspects have been thoroughly investigated by several groups. With the development of robust multiple-pulse sequences, homonuclear and heteronuclear Hartmann-Hahn transfer has become one of the most useful experimental building blocks in high-resolution NMR. Multiple-pulse sequences can be conveniently analyzed and classified with the help of average Hamiltonian theory, which also provides valuable design principles for the development of new experimental building blocks. Although many useful Hartmann-Hahn mixing sequences have been developed, it has become clear that there cannot be a single, ideal mixing sequence for all applications.
71 citations
TL;DR: A new homonuclear Hartmann-Hahn-type mixing scheme is introduced that effects coherence transfer between resonances in two separated frequency bands and is applied to Cα,C′ transfer and to the transfer between Cβ and aromatic carbon spins.
Abstract: A new homonuclear Hartmann-Hahn-type mixing scheme is introduced that effects coherence transfer between resonances in two separated frequency bands. The mixing scheme relies on the irradiation of two-band selective shaped pulses that are expanded in an MLEV-16 supercycle. Similar to heteronuclear Hartmann-Hahn experiments, a planar effective coupling tensor is created. This novel mixing scheme is applied to Cα,C′ transfer and to the transfer between Cβ and aromatic carbon spins.
52 citations
TL;DR: The conformational analysis of the backbone angle γ (O5‘−C5'−C4'− C3' ) and the stereospecific assignment of the H5'(pro-S), H5´(pro)-R) diastereotopic protons in a uniformly 13C,15N labeled RNA oligo...
Abstract: The conformational analysis of the backbone angle γ (O5‘−C5‘−C4‘−C3‘) and the stereospecific assignment of the H5‘(pro-S), H5‘(pro-R) diastereotopic protons in a uniformly 13C,15N labeled RNA oligo...
43 citations
TL;DR: The theory of directed TOCSY is presented for linear spin systems that are frequently found in carbon-labeled biomolecules and provides a new approach for the simplification of crowded spectra.
25 citations
TL;DR: In this article, analytical coherence and polarization transfer functions are presented for spin systems consisting of three spins- 1 2 with arbitrary coupling constants under isotropic-mixing conditions, and optimal durations for the mixing-time period can be determined for correlations of interest.
24 citations
TL;DR: In this paper, a new HSQC-type pulse scheme is introduced that effectively improves the spectral resolution by what corresponds to the size of geminal J HH coupling constants, i.e., on the order of −14 Hz in CH 2 groups of peptides and proteins.
14 citations