X-ray Spectrometry / Ezine
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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Resistant antibiotics on the horizon
Date: Jun 1, 2009
Author: David Bradley
The crystal structure of a penicillin-binding protein 1B (PBP1b) has been obtained by a team in Taiwan. The research could represent a major step forward in the development of novel antibiotics against resistant strains of bacteria.
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C60, C80, C0, Go!
Date: May 15, 2009
Author: David Bradley
X-ray crystallography, nuclear magnetic resonance spectroscopy, and other techniques have allowed German chemists to demonstrate their synthesis of the first non-carbon analogue of the C80 fullerene molecule.
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The potential of X-ray diffraction in the analysis of burned remains from forensic contexts
Date: May 11, 2009
Author:
A new and accurate method of determining the temperature and duration of burning of human remains in forensic contexts used powder X-ray diffraction to analyse human bone and teeth.
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