Introduction: Signal-to-noise ratio (SNR) of nuclear magnetic resonance (NMR) imaging and spectroscopy of implanted bio-artificial tissue constructs can be improved by placing a NMR receiver coil around the implanted construct and receive the NMR signal response through inductive coupling with the external surface coil [1]. The limitation of this approach is that the implanted coil cannot be di...

We showed earlier [ 1,2] that PMR spectroscopy of phospholipid membranes in the presence of paramagnetic ions makes it possible to distinguish between signals coming from the inner and outer surfaces of a membrane, since the signal from the N+(CH,), protons of the outer surface lecithin molecules is considerably shifted in comparison with the signal from the inner surface protons. As there are ...

Surface proteins in Gram-positive bacteria are anchored to the cell wall by the action of sortase enzymes. The Staphylococcus aureus sortase A (SrtA) protein anchors proteins by recognizing a cell wall sorting signal containing the amino acid sequence LPXTG. To understand how SrtA binds this sequence, we carried out NMR studies of new peptidyl-cyanoalkene and peptidyl-sulfhydryl inhibitors that...

The 1 H nuclear magnetic resonance (NMR) spin-lattice relaxation rate of hydrated sands is related to the surface-to-volume ratio of the voids or pores between the hydrated sand grains and the surface relaxivity of the grains. The electron spin resonance (ESR) signal is often used to predict the relative surface relaxivity as the surface relaxivity is thought to be proportional to the concentra...

Surface nuclear magnetic resonance (NMR) is a non-invasive geophysical method that can provide valuable information about aquifer properties related to groundwater flow and storage. Our ability to extract such information from surface NMR data, however, is limited by an insufficient understanding of the relaxation parameter T2 * governing the decay rate of the surface NMR signal in Earth’s magn...

39K nuclear magnetic resonance (NMR) spectra were readily obtained, in vivo, from rat muscle, kidney, and brain in 5-10 min with signal-to-noise ratios of approximately 20:1. Quantitation of the K+ signal was achieved by reference to an external standard of KCl/dysprosium nitrate as well as by reference to the proton signal from tissue water. In vitro NMR studies of isolated tissue showed a K+ ...

Energetic studies on exercising animals are usually limited to oxygen consumption measurements in respirometers followed by invasive tissue sampling and analysis of metabolites. Noninvasive studies of exercising animals like through the use of P NMR are typically restricted to ‘‘stop and go’’ measurements. Furthermore, magnetic resonance AQ6 studies of marine animals are hampered by sea water, ...