NMR characterization of structure and moisture sorption dynamics of damaged starch granules.

Among the many biopolymers that constitute food products, starch is one of the most common. Starch granules are often damaged in the milling process, which affects the final product quality, mainly due to changes in water adsorption properties. In this work, the crystallinity degree of wheat starch samples as a function of the mechanical damage is determined by low field H NMR.

Magnetic resonance imaging of (1)H long lived states derived from parahydrogen induced polarization in a clinical system.

Hyperpolarization is a powerful tool to overcome the low sensitivity of nuclear magnetic resonance (NMR). However, applications are limited due to the short lifetime of this non equilibrium spin state caused by relaxation processes. This issue can be addressed by storing hyperpolarization in slowly decaying singlet spin states which was so far mostly demonstrated for non-proton spin pairs, e.

Parahydrogen Induced polarization by homogeneous catalysis: theory and applications.

The alignment of the nuclear spins in parahydrogen can be transferred to other molecules by a homogeneously catalyzed hydrogenation reaction resulting in dramatically enhanced NMR signals. In this chapter we introduce the involved theoretical concepts by two different approaches: the well known, intuitive population approach and the more complex but more complete density operator formalism. Furthermore, we present two interesting applications of PHIP employing homogeneous catalysis.

Storage of quantum coherences as phase-labelled local polarization in solid-state nuclear magnetic resonance.

Nuclear spins are promising candidates for quantum information processing because their good isolation from the environment precludes the rapid loss of quantum coherence. Many strategies have been developed to further extend their decoherence times. Some of them make use of decoupling techniques based on the Carr-Purcell and Carr-Purcell-Meiboom-Gill pulse sequences.

Long-lived 1H singlet spin states originating from para-hydrogen in Cs-symmetric molecules stored for minutes in high magnetic fields.

Nuclear magnetic resonance (NMR) is a very powerful tool in physics, chemistry, and life sciences, although limited by low sensitivity. This problem can be overcome by hyperpolarization techniques dramatically enhancing the NMR signal. However, this approach is restricted to relatively short time scales depending on the nuclear spin-lattice relaxation time T(1) in the range of seconds.