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Photosynthesis:Study sheds new light

Date: Apr 15, 2013

Author: David Bradley

Caltech chemists believe they can now explain one of the last remaining mysteries concerning the process of photosynthesis in which light powers chemical conversion of carbon dioxide and water into sugars and oxygen. The work is based on synthetic, spectroscopic, and electrochemical studies, including X-ray spectroscopic work, and might one day lead to a range of novel photocatalysts that could be used to drive the water-splitting reactions in a synthetic analogue of photosynthesis.

Read More thumbnail image: PhotosynthesisStudy sheds new light

Journal Highlight: A tunable multicolour rainbow filter for improved stress and dislocation density field mapping in polycrystals using X-ray Laue microdiffraction

Date: Apr 8, 2013

Author: spectroscopyNOW

A new rainbow method for measuring the energy profiles of Laue spots while remaining in the white-beam mode proceeds in the opposite way compared to a monochromator-based method, by simultaneously removing several sharp energy bands from the incident beam.

Read More thumbnail image: Journal Highlight A tunable multicolour rainbow filter for improved stress and dislocation density field mapping in polycrystals using X-ray Laue microdiffraction

Paintable electronics: Bringing polymers into line

Date: Apr 1, 2013

Author: David Bradley

Engineers at the University of Michigan and electronics company Samsung in Korea have devised a method for bringing otherwise unruly semiconducting polymers into line as verified by X-ray diffraction studies, which they suggest might one day pave the way for cheaper, greener, "paint-on" plastic electronics.

Read More thumbnail image: Paintable electronics Bringing polymers into line

Carbon capture: Porous trap for greenhouse gas

Date: Mar 15, 2013

Author: David Bradley

Scientists at the King Abdullah University of Science and Technology (KAUST) and the University of South Florida (USF), USA, have developed a unique, efficient, cost-effective as well reusable metal-organic framework (MOF) material, for trapping and separating carbon dioxide from various gas streams. These crystalline materials could lead to clean-air and energy-saving technologies.

Read More thumbnail image: Carbon capture Porous trap for greenhouse gas

Journal Highlight: Gilding and pigments of Renaissance marble of Abatellis Palace: non-invasive investigation by XRF spectrometry

Date: Mar 11, 2013

Author: spectroscopyNOW

The chemical composition of pictorial layers and their stratigraphical distribution on renaissance marble sculptures from Abatellis Palace, Palermo, have been characterised by UV-vis fluorescence and XRF measurements.

Read More thumbnail image: Journal Highlight Gilding and pigments of Renaissance marble of Abatellis Palace non-invasive investigation by XRF spectrometry

A message for you: Mercury's turbulent past

Date: Mar 1, 2013

Author: David Bradley

X-ray spectroscopy and astronomical analyses reveal that Mercury - the planet closest to the Sun - may have had a vast, roiling ocean of liquid rock, or magma, during its very early history some 4.5 billion years ago.

Read More thumbnail image: A message for you Mercurys turbulent past

Pablo Picasso: Decorator

Date: Feb 15, 2013

Author: David Bradley

What type of paint did one of the most renowned and infamous artists of the twentieth, century, Pablo Picasso, use in his work - matte, gloss or emulsion? The Art Institute of Chicago and scientists at Argonne National Laboratory think they know having used a hard X-ray nanoprobe to help them unravel what is a decades-long debate among art scholars.

Read More thumbnail image: Pablo Picasso Decorator

Journal Highlight: Comparison of plain vertebral X-ray and dual-energy X-ray absorptiometry for the identification of older women for fracture prevention in primary care

Date: Feb 11, 2013

Author: spectroscopyNOW

The effects of the amended dual-energy X-ray absorptiometry diagnostic cut-off in the Australian Pharmaceutical Benefits Scheme for primary fracture prevention therapy with alendronate on case finding and cost have been assessed in older women.

Read More thumbnail image: Journal Highlight Comparison of plain vertebral X-ray and dual-energy X-ray absorptiometry for the identification of older women for fracture prevention in primary care

Hydrogen from silicon: Just add water

Date: Feb 1, 2013

Author: David Bradley

Two techniques, X-ray photoelectron spectroscopy (XPS) and time-of-flight-secondary-ion-mass-spectrometry (TOF-SIMS), have been used in parallel to show how adding water to silicon can generate hydrogen. The work might take us another step closer to the so-called carbon-free hydrogen economy.

Read More thumbnail image: Hydrogen from silicon Just add water

Brewing up crystal structures: Hoppy bitterness

Date: Jan 15, 2013

Author: David Bradley

During brewing, beer obtains its bitter flavour from the bitter iso-alpha acids that come from hops. In the journal Angewandte Chemie, scientists now report that they have used X-ray crystallography to determine the absolute configurations of these humulones and isohumulones, as well as several of their derivatives.

Read More thumbnail image: Brewing up crystal structures Hoppy bitterness
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