✍ Scribed by K. Takegoshi; Kunio Hikichi
No coin nor oath required. For personal study only.
Effects of sample spinning on "overtone" NMR of quadrupole nuclei with spin= 1 in the solid is investigated. A possibility for reducing second-order quadrupole broadening by DAS and DOR methods is also discussed.
📜 SIMILAR VOLUMES
A method for the calculation of NMR lineshapes is presented for homonuclear two spin-l/2 systems performingjump motions in rotating solids. The NMR spectra of such spin systems were found to be useful for detecting the existence of conformational changes as well as that of molecular motions in the s
## Abstract Magic‐angle spinning (MAS) has recently been shown to enhance spectral resolution in NMR examinations of intact biological tissue ex vivo. This work demonstrates that freezing certain tissue samples before examination by ^1^H MAS NMR can have a marked effect on their spectra. Spectra of
Magic angle spinning at sufficiently high rates dramatically changes the sample temperature. A method is described for calibrating a probe head for the thermal e †ects encountered during magnic angle spinning experiments. Using as a chemical shift thermometer, the overlapping e †ects of "externalÏ h
T, relaxation of one set of nuclei causes an extra-broadening and an apparent reduction of the spin-spin splitting in the NMR spectrum of another set of nuclei coupled to it. These effects are demonstrated by lime-shape calculations for first order multiplets of spin l/2 nuclei. It is shown that in