Atomic / Ezine
On the other hand - the chirality of proteins
Date: Aug 30, 2005
Author: David Bradley
It is testament to the gradually improving public understanding of science, that a dairy-product manufacturer recently brought "right-handed yoghurt" to the market. The basis of the science behind such a product is, presumably, the inequivalence of chiral, or handed, molecules in biology.
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Keeping time logically with quantum spectroscopy
Date: Aug 30, 2005
Author: David Bradley
Physicists at the US National Institute of Standards and Technology (NIST) have developed a general technique for carrying out precision spectroscopy on atoms that lack suitable transitions for efficient laser cooling, internal state preparation, and detection.
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Combined light harvester
Date: Aug 15, 2005
Author: David Bradley
An efficient light collector, capable of capturing light over the whole visible spectral range and ultimately transferring it to the core TDI (terylenedi-imide) and finally releasing it as red fluorescence has been designed by researchers.
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Microreactors for new, improved QD
Date: Aug 15, 2005
Author: David Bradley
Absorbance and photoluminescence spectroscopy have been used to help US researchers develop and monitor the workings of a novel microfluidic reactor.
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IR protein probe
Date: Aug 15, 2005
Author: David Bradley
German researchers have demonstrated that introducing a carbon-13 atom into a specific position on the amino acid tyrosine shifts the infra-red band of this residue to lower frequencies. This allows the researchers to probe conformational changes in proteins across different regions simultaneously using IR spectroscopy.
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Martian aurora
Date: Aug 1, 2005
Author: David Bradley
An aurora, distantly akin to the Northern and Southern lights seen close to the poles on earth has for the first time been observed on Mars by the SPICAM instrument aboard European Space Agency's Mars Express spacecraft.
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Hurricanes touch base with ozone
Date: Aug 1, 2005
Author: David Bradley
US researchers have followed the variations of ozone levels from the surface to the upper atmosphere using NASA's satellite Earth Probe/TOMS (total ozone mapping spectrometer).
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A molecular bunker for chromophores
Date: Aug 1, 2005
Author: David Bradley
Rhodamines are important fluorescent dyes, chromophores, for spectral calibration in fluorometers, single-molecule detection, as imaging agents for biomolecules, for scanning confocal microscopy, in fluorescence correlation spectroscopy (FCS), and in high-throughput screening.
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Singular transistor
Date: Aug 1, 2005
Author: David Bradley
A Canadian and UK researchers have worked together to create the world's first single-molecule transistor.
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Bridging solutions
Date: Jul 15, 2005
Author: David Bradley
Dinuclear copper(II) complexes with nitrogen-containing ligands are being hotly pursued by chemists as models for numerous copper-containing proteins, such as the tyrosine and catechol oxidases.
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