The Taylor vortex: the measurement of viscosity in NMR samples

Field modulation effects induced by sample spinning: application to high-resolution magic angle spinning NMR

“…In the case of a viscous medium such as a heterogeneous quasi-liquid, the situation is analogous. Particular experimental conditions are used to induce flow by the spinning such as a sample placed between two horizontal concentric tubes rotating at very low spinning rates of different value [32]. After a brief transition from turbulent to laminar flow the MAS sample reach a stationary spinning state.…”

Radial-Field Sidebands in MAS

“…[7] V ϭ 2 0 exp͓i͑ 0 Ϫ ⍀͒t͔ ͵͵ d dz b* 1 ͑, z͒a͑, z͒, [9] that is a frequency shift algebraically equal to Ϫ⍀ and a signal amplitude independent of the spinning frequency. This is the basic result of article (I).…”

Cellulose Nanocrystal Liquid Crystal Phases: Progress and Challenges in Characterization Using Rheology Coupled to Optics, Scattering, and Spectroscopy

“…used NMR spectroscopy to extract rheological data. Experiments that were denoted as “rheo-NMR” were later developed by Nakatani et al ., who explored sheared polymer melts using in situ NMR studies; this study took up the work developed by Vera and Grutzner , and Lacelle et al …”

“…Martins et al 113 used NMR spectroscopy to extract rheological data. Experiments that were denoted as "rheo-NMR" were later developed by Nakatani et al, 114 who explored sheared polymer melts using in situ NMR studies; this study took up the work developed by Vera and Grutzner 115,116 and Lacelle et al 117 In rheo-NMR, two main concepts predominate. The first refers to velocity imaging (i.e., the flow field that will be spatially mapped and analyzed).…”