We have used nuclear resonance vibrational spectroscopy (NRVS) to examine the nature of the Fe–S unit. Specifically, vibrational characteristics have been determined, and through incremental steps in model system complexity, applied to analysis of the enzyme nitrogenase. This stepwise strategy demonstrates NRVS as a viable bioinorganic tool, and will undoubtedly increase the application of sync...

A diverse group of proteins known as +TIPs specifically recognize the growing plus ends of microtubules in cells. Two recent papers on one such protein, CLIP-170, provide new insights into the cellular functions of +TIPs as well as the mechanism by which they track microtubule ends.

Turbulent transport models and data in bubbly flows are briefly reviewed since they play an important role in the modeling of boiling flows in forced convection. Shortcomings of earlier measurements of the eddy diffusivity by NMR (Lemonnier & Leblond, 2007b) are analyzed and a new procedure is presented which is now consistent with the procedure of Gatenby & Gore (1994) developed for single-pha...

DEUTSCH) In der hier vorgestellten Arbeit werden neuartige Festkörper-NMR (Nuclear Magnetic Resonance) Experimente vorgestellt, die eine direkte Detektion von Protonen einbeziehen. Die Technik basiert auf einer weitgehenden Verdünnung der Protonen durch Deuteronen in vollständig isotopenmarkierten, rekombinant exprimierten Proteinen und ermöglicht FestkörperNMR mit sehr schmalen Linienbreiten a...

Shimming systems are required to provide sufficient field homogeneity for high resolution nuclear magnetic resonance (NMR). In certain specialized applications, such as rotating-field NMR and mobile ex situ NMR, permanent magnet-based shimming systems can provide considerable advantages. We present a simple two-dimensional shimming method based on harmonic corrector rings which can provide arbi...

We construct a quantumness witness following the work of Alicki & van Ryn (AvR). We reformulate the AvR test by defining it for quantum states rather than for observables. This allows us to identify the necessary quantities and resources to detect quantumness for any given system. The first quantity turns out to be the purity of the system. When applying the witness to a system with even modera...