X-ray Spectrometry / Ezine
Soft X-ray spectromicroscopy of nickel sorption in a natural river biofilm
Date: Sep 14, 2009
Author:
Scanning transmission X-ray microscopy at the C 1s, O 1s, Ni 2p, Ca 2p, Mn 2p, Fe 2p, Mg 1s, Al 1s and Si 1s edges was used to study Ni sorption in a complex natural river biofilm.
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Smokestack scrubber
Date: Sep 1, 2009
Author: David Bradley
Korean researchers have developed a new, highly porous material that can soak up carbon dioxide efficiently and highly selectively. The material, characterised by X-ray diffraction and other techniques might one day be used to "scrub" out the greenhouse gas from power stations and factories that burn fossil fuels for energy.
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Chicken shack remediation
Date: Aug 15, 2009
Author: David Bradley
X-ray absorption spectroscopy and monitoring of soil enzyme activity have been used to monitor the effects on lead speciation of plant growth and added chicken guano. The approach could allow gun shooting clubs to clean up land contaminated with ammunition lead.
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Elemental content of aerosol particles in an underground tram station
Date: Aug 10, 2009
Author:
The mass, black carbon, and elemental concentrations of particulate matter of two size fractions at an underground tram station in Gothenburg, Sweden were determined. Energy dispersive x-ray fluorescence spectrometry gave the concentrations of 14 elements in most of the samples.
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Metabolic targets
Date: Aug 1, 2009
Author: David Bradley
X-ray crystallography has allowed German researchers to focus on an important metabolic reaction that exists in many different aggressive microorganisms, including all pathogenic bacteria and the malaria parasite. The revealed structure could offer a promising new target for novel drugs.
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Topical resistance
Date: Jul 15, 2009
Author: David Bradley
Crystallography by UK scientists may have uncovered the mechanism by which quinolone drugs interact with DNA and bacterial topoisomerase and so point to a better understanding of how resistance to this class of drugs emerges in meningitis and pneumonia.
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Modelling the response function of energy dispersive X-ray spectrometers with silicon detectors
Date: Jul 13, 2009
Author:
A new, analytical description of the physical processes determining the spectral response of an energy dispersive X-ray spectrometer with a silicon detector (Si(Li) or silicon drift detector) is presented.
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The ancient history of giant sperm
Date: Jul 1, 2009
Author: David Bradley
Synchrotron X-ray holotomography at the ESRF has revealed why size really does matter to the sex lives of some creatures. The researchers provide evidence of ancient giant fossil sperm and hint at a link to organisms alive today.
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Enzymic activity
Date: Jun 15, 2009
Author: David Bradley
Researchers have obtained the first three-dimensional crystal structure of the non-haem, iron-containing enzyme, hydroxyethylphosphonate dioxygenase (HEPD) from the Streptomyces soil microbe. The study could lead to new agricultural technology, catalysts, and even novel antibiotics.
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X-Ray laser: past, present, and future
Date: Jun 8, 2009
Author:
This review concentrates on X-ray laser research and development covering the so called soft X-ray region (down to ca. 10 nm) and the water window region (down to 2.3 - 4.4 nm).
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