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Plastic double helix: X-ray reveals details

Date: Mar 15, 2019

Author: David Bradley

X-ray crystallography has revealed the existence of a double helical structure in a synthetic macromolecule known for thirty years. The discovery could open up novel applications for the high-strength polymer called, PBDT [poly(2,2'-disulfonyl-4,4'-benzidine terephthalamide)].

Read More thumbnail image: Plastic double helix X-ray reveals details

Journal Highlight: Evaluation of X‐ray tomography contrast agents: A review of production, protocols, and biological applications

Date: Mar 11, 2019

Author: spectroscopyNOW

Molecule‐based and nanoparticle‐based contrast agents used in biological applications to enhance the image quality in X-ray tomography have been compiled and reported.

Read More thumbnail image: Journal Highlight Evaluation of Xray tomography contrast agents A review of production protocols and biological applications

Uranium chelation: X-ray stuctrure

Date: Mar 1, 2019

Author: David Bradley

A chelating agent inspired by biological siderophores that soaks up uranium from aqueous solution has been studied using X-ray photoelectron spectroscopy (XPS) and elemental distribution mapping via energy-dispersive X-ray (EDX) spectroscopy analysis together with various other spectroscopic techniques.

Read More thumbnail image: Uranium chelation X-ray stuctrure

Shipwreck analysis: X-ray's smoking gun

Date: Feb 15, 2019

Author: David Bradley

 Archaeologists have used an X-ray gun to carry out an analysis of the ceramic cargo of a ship that sank in The Java Sea 800 years ago.

Read More thumbnail image: Shipwreck analysis X-rays smoking gun

Journal Highlight: Macro X‐ray fluorescence imaging spectroscopy of the suggested Santi di Tito's portrait of Galileo Galilei

Date: Feb 12, 2019

Author: spectroscopyNOW

X‐ray fluorescence imaging spectroscopy has been used to authenticate a painting of a bearded man on display at the Eremitani Museum in Padua attributed to Jacopo Tintoretto and suggested to be the lost portrait of Galileo Galilei painted by the Tuscan master Santi di Tito in 1602.

Read More thumbnail image: Journal Highlight Macro Xray fluorescence imaging spectroscopy of the suggested Santi di Titos portrait of Galileo Galilei

Probing the interfaces: X-ray spectroscopy

Date: Feb 1, 2019

Author: David Bradley

RK Lam of the University of California, Berkeley, USA and colleagues have developed a new X-ray spectroscopic technique to help them probe the interfaces with both surface and element-specific selectivity. They have demonstrated proof of principle by examining individual graphene layers within bulk graphite.

Read More thumbnail image: Probing the interfaces X-ray spectroscopy

Journal Highlight: Study of two large‐dimension Murillo's paintings by means of macro X‐ray fluorescence imaging, point X‐ray fluorescence analysis, and stratigraphic studies

Date: Jan 15, 2019

Author: spectroscopyNOW

Two large‐dimension paintings by Murillo have been studied by macro X‐ray fluorescence scanning, point X‐ray fluorescence and stratigraphic analyses to characterize the different components of the paintings for a clearer understanding of the artist's painting technique and creative process.

Read More thumbnail image: Journal Highlight Study of two largedimension Murillos paintings by means of macro Xray fluorescence imaging point Xray fluorescence analysis and stratigraphic studies

Under pressure: X-rayed receptor

Date: Jan 15, 2019

Author: David Bradley

X-ray crystallography has been used to map the active-state structure of the angiotensin II type 1 receptor, a major target of a range of prescription medicines used to moderate blood pressure and kidney function.

Read More thumbnail image: Under pressure X-rayed receptor

Vitamin B12 receptor: Crystal structure

Date: Jan 7, 2019

Author: David Bradley

The crystal structure of the body's largest cell receptor has been determined by researchers at Aarhus University in Denmark. The endocytic receptor cubam formed by the 460-kDa protein cubilin and the 45-kDa transmembrane protein amnionless (AMN), allows vitamin B12 to be absorbed from the intestine and allows the reabsorption of proteins, including albumin from the kidney filtrate.

Read More thumbnail image: Vitamin B12 receptor Crystal structure

Journal Highlight: Feasibility study of phase‐contrast X‐ray laminography using X‐ray interferometry

Date: Dec 5, 2018

Author: spectroscopyNOW

Phase‐contrast X‐ray laminography using X‐ray interferometry has been developed for fine observation of laminar samples, illustrated for a flat limestone slab.

Read More thumbnail image: Journal Highlight Feasibility study of phasecontrast Xray laminography using Xray interferometry
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