Ten construction workers will often get a job done faster than one. But in digging a deep well, for instance, ten workers are a waste of human resources: the diggers can’t work simultaneously, as the second worker isn’t able to start digging until the first one has finished, and so on.
A similar challenge is encountered by scientists who study the structure and dynamics of molecules using nuclear magnetic resonance (NMR) spectroscopy. This technique serves as an essential tool in understanding numerous molecules – including proteins, nucleic acids and active pharmaceuticals – in their natural surroundings. It does this by exposing them to electromagnetic radiation and studying the dispersion patterns of the electromagnetic waves that hit the molecules. However, to obtain a full NMR picture of such complex molecules one needs to perform numerous measurements that are based on the same “serial” principle as well digging: hundreds or thousands of one-dimensional scans need to be performed one after the other; these scans need then to be combined to create a unified multidimensional picture of the molecule. While a single scan may take a fraction of a second, multidimensional procedures may last several hours or even days.
A team led by Prof. Lucio Frydman of the Weizmann Institute’s Chemical Physics Department has now found a way to perform multidimensional NMR with a single scan. The new method, described in the December 2002 issue of the Proceedings of the National Academy of Sciences USA (PNAS), is expected to significantly speed up molecular studies routinely performed in diverse fields.
Alex Smith | EurekAlert!
Columbia engineers create artificial graphene in a nanofabricated semiconductor structure
13.12.2017 | Columbia University School of Engineering and Applied Science
Long-lived storage of a photonic qubit for worldwide teleportation
12.12.2017 | Max-Planck-Institut für Quantenoptik
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
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