13C-magnetic resonance

Gruetter, R., Novotny, E. J., Boulware, S. D. etal. Non-inva-sive measurements of the cerebral steady-state glucose concentration and transport in humans by 13C magnetic resonance. In L. Drewes and A. Betz (eds), Frontiers in Cerebral Vascular Biology Transport and its Regulation, vol. 331. New York Plenum Press, 1993, pp. 35-40. 

The 13C magnetic resonance spectra have been reported for naturally occurring nucleotides 538, nucleosides,79-81,539 and uracil, thymine, 5-... 

On the subject of carbon aromaticity of coal, 13C magnetic resonance spectroscopy has also found use in determining the fraction of carbon atoms that are in aromatic locations (fa) as well as attempting to define the structure of the aromatic ring system. However, there is a possibility of serious underestimation of aromaticity by this method (Miknis, 1988 Snape et al., 1989 Sfihi and Legrand, 1990). 

The 13C magnetic resonance spectrum is given in Figure 4 and was obtained using a Varian CFT-20 (FT mode) spectrometer with dgDMSO as the solvent at a concentration of 10% w/v. The spectrum is consistent with the structure and the assignments are in Table II (17). 

Although dianion [Rh fCOu,]2 " has never been isolated in the solid state owing to its lability, it can be considered a definite intermediate. In fact, it has a characteristic and reproducible lit spectrum, and at — 70°C it has a peculiar 13C magnetic resonance spectrum consisting of two doublets (191.7 and 208.3 ppm) and a multiplet (247 ppm) (74). 

For proton and 13C magnetic resonance studies of non-aqueous solutions the most recommended reference compound is tetramethyl silane, (CH3)4Si, which is magnetically... 

Lin AP, Shic F, Enriquez C, Ross BD (2003) Reduced glutamate neurotrtuismission in patients with Alzheimer s disease - an in vivo 13C magnetic resonance spectroscopy study. MAGMA 16 29 2... 

The checkers obtained the cyclobutane 1 as a colorless crystalline solid, m.p. 45-47° (a mixture of major and minor isomers), that is relatively free of 1,2-dichloro-1,2-dicyanocyclobutane. The product had the following spectral properties proton magnetic resonance (chloroform-d) 8 (multiplicity) 2.35-3.15 (multiplet), 3.40-4.20 (multiplet) 13C magnetic resonance (chloroform-d) 8 major isomer 21.58 (triplet), 38.41 (doublet), 37.24 (triplet), minor isomer 22.48 (triplet), 36.72 (doublet), 36.91 (triplet). 

C magnetic resonance spectra were determined with a Fourier transform spectrometer (Varian XL-100-15), with deuterochloroform as the solvent. 

Principles of Natural Abundance Fourier Transform 13C Magnetic Resonance Spectroscopy... 

Gorin, P. A. J., and Mazurek, M. (1975). Con. /. Chem. 53, 1212. Further Studies on the Assignment of Signals in 13C Magnetic Resonance Spectra of Aldoses and Derived Methyl Glycosides. 

Moon, R. B., and Richards, J. H. (1974). Biochemistry 13, 3437. 13C Magnetic Resonance Studies of the Binding of Carbon Monoxide to Various Hemoglobins. 

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