โ Scribed by N Lumbroso-Bader; C Coupry; D Baron; D.H Clague; G Govil
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Quantum tunneling frequencies of methyl groups at low temperature can be measured directly by low-field nuclear magnetic resonance (NMR) using our d&QUID (superconducting quantum interference device) spectrometer. From NMR spectra recorded in magnetic fields below 20 mT, tunneling frequencies betwee
N M R studies were conducted on the a-COOH groups of the amino acids Val, Leu, Ile, His and Pro and on the y-COOH group of Glu. Limit chemical shifts, downfield from external water, were 249-257 ppm in aqueous solution at low pH, and 234-243 ppm in HS0,F. The relative nuclear screening order for a-C
Some hydroxyquinoline carboxylic acids and their conjugate acids and bases were characterized by 13 C and 15 N NMR spectroscopy in solution and in the solid state. Differences in 13 C and, in particular, 15 N chemical shift patterns allow to distinguish between individual tautomers and confirm the p