Restricted diffusion is a common feature of many physicochemical, biological, and industrial
processes. Nuclear magnetic resonance techniques are often used to survey the atomic or …

The sensitivity of conventional nuclear magnetic resonance (NMR) techniques is
fundamentally limited by the ordinarily low spin polarization achievable in even the strongest …

Measuring molecular diffusion is widely used for characterizing materials and living
organisms noninvasively. This characterization relies on relations between macroscopic …

Translational motion in solution, either diffusion or fluid flow, is at the heart of chemical and
biochemical reactivity. Nuclear Magnetic Resonance (NMR) provides a powerful non …

We demonstrate the quantitative extraction of multidimensional distribution functions in the
presence of grossly inhomogeneous fields. Examples are shown for diffusion—T2 …

We introduce the various options of experimentally observing mass transfer in mesoporous
materials. It shall be demonstrated that the exploration of the underlying mechanisms is …

The nuclear spin polarization of the noble gas isotopes 3He and 129Xe can be increased
using optical pumping methods by four to five orders of magnitude. This extraordinary gain …

This is a tutorial describing how the time‐dependent diffusion coefficient D (t) of mobile
molecules confined in pores or cells carries information about the confining geometry. At …

Restrictions to molecular motion by barriers (membranes) are ubiquitous in porous media,
composite materials and biological tissues. A major challenge is to characterize the …

We use confocal microscopy to directly visualize the spatial fluctuations in fluid flow through
a three-dimensional porous medium. We find that the velocity magnitudes and the velocity …