## Abstract Localized, water‐suppressed ^1^H‐[^13^C]‐NMR spectroscopy was used to detect ^13^C‐label accumulation in cerebral metabolites following the intravenous infusion of [1,6‐^13^C~2~]‐glucose (Glc). The ^1^H‐[^13^C]‐NMR method, based on adiabatic RF pulses, 3D image‐selected in vivo spectros
Design of a 13c {1h} rf probe for monitoring the in vivo metabolism of [1-13c] glucose in primate brain
✍ Scribed by B. E. Hammer; W. Sacks; R. E. Bigler; M. J. Hennessy; S. Sacks; A. Fleischer; P. B Zanzonico
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 255 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
Abstract
The design of an RF probe suitable for obtaining proton‐decoupled ^13^C spectra from a subhuman primate brain is described. Two orthogonal saddle coils, one tuned to the resonant frequency of ^13^C and the other to the resonant frequency of ^1^H, were used to monitor the in vivo metabolism of [1‐^13^C] glucose in rhesus monkey brain at 2.1 T. Difference spectra showed the appearance of ^13^C‐enriched glutamate and glutamine 30 to 40 min after a bolus injection of [ 1‐ ^13^C] glucose.
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## Abstract Selective detection of {1−^13^C}‐glucose and its glycolytic product, {3−^13^C}‐lactate, was achieved by selective ^13^C NMR spectroscopy with ^1^H cross polarization. The total sensitivity of conventional broadband experiments was retained, and peak intensities were at least equivalent
Resolved localized nuclear magnetic resonance (NMR) signals of 1 H bound to 13 C label in the carbon positions of glutamate C4, C3 and glutamine C4, C3, as well as in aspartate C3, lactate C3, alanine C3, ␥-aminobutyric acid C3, and glucose C1 were simultaneously observed in spectra obtained from ra
Vicinal 1H, 13C coupling constants were measured for rigid unsaturated 1HÈCÈCx13C molecular frameworks at natural abundance. As a general trend, an empirical range of 4.5-6.5 Hz is observed independent of the value of the dihedral angle between the CH bond and the plane of the double bond. Furthermo