β Scribed by S. Mohanty
No coin nor oath required. For personal study only.
Analysis of 'H and 13C! spectra of l-'3C-acctyl&ne giver the same relative sign for JCH and -I&. Precise chemical shift valyes due to isotopic substitution are reported and compared with the earlier results. The chemical shift anisotropics (Ao) in acetylene and 1,2-13 C-acetylene arc found to be 22 f 2 ppm for theproton and 245 t IS ppm for the carbon-13 nuclei.
π SIMILAR VOLUMES
Full 13C NMR shift assignments have been made for both the sterculate and malvalate moieties in the seed oil from Sterculia fi~etida, and the chain distribution has been determined from quantitative NMR measurements. The proportion of malvalate is not significant at the inner chain position.
## Abstract ^13^C n.m.r. spectra of some substituted isoxazoles have been examined to ascertain the reactive site in the metallation of 4βsubstituted 3,5βdimethylisoxazoles. The results obtained indicate that metallation occurred exclusively at the Cβ5 methyl.
## Abstract The ^17^O NMR chemical shifts of five enriched amino acids have been measured under strictly controlled conditions of concentration, ionic strength, pH and temperature. The Ξ±, Ξ² and Ξ±, Ξ³ carboxyl resonances of aspartic and glutamic acid, respectively, have been resolved. Line widths wer
## Abstract Carbonβ13 NMR chemical shifts are reported for six angular and one linear dichloropyridoquinolines in CDCl~3~. The chemical shift assignments have been made using model compounds, fully coupled spectra, selective proton decoupling and results from lanthanide shift studies. Chlorine subs
An NMR method was developed for measuring the isotopic enrichment of glutathione in extracts of cells fed a medium containing [3,3-13 C 2 ]cystine. Two sublines of human mammary adenocarcinoma MCF-7 cells were exposed to growth medium containing the labeled cystine for varying periods, treated with