## Abstract Nitrogen chemical shifts constitute an effective means of distinguishing between isomeric benzazole ring systems. There is a large difference in nitrogen shielding, usually more than 20 ppm, between isomeric benzenoid‐ and quinonoid‐like structures. ^13^C and ^1^H NMR is shown to provid
Differential biohydrogenation and isomerization of [U-13C]Oleic and [1-13C]Oleic acids by mixed ruminal microbes
✍ Scribed by Erin E. Mosley; Anna Nudda; Adolfo Corato; Erica Rossi; Tom Jenkins; Mark A. McGuire
- Book ID
- 107487796
- Publisher
- Springer-Verlag
- Year
- 2006
- Tongue
- English
- Weight
- 207 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0024-4201
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A detailed structural analysis of the copolyesterification in bulk without any external catalyst at 160ЊC between o-phthalic anhydride (P), oleic acid (O), and trimethylolpropane (T) with a mol ratio ([{COOH]/[{OH]) Å 0.70 has been carried out by high resolution 13 C nuclear magnetic resonance ( 13
## Abstract The presence of two diastereoisomeric thiazolidines obtained by the reaction of L‐cysteine or L‐cysteine ethyl ester and pyridoxal or pyridoxal‐5‐phosphate is demonstrated by ^1^H and ^13^CNMR spectroscopy. Fast interconversion of isomers occurs in neutral or alkaline solution.