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Gold too? Ions in the +II oxidation state

Date: Aug 15, 2017

Author: David Bradley

When it comes to atoms there are several seemingly immutable facts about many of them - their oxidation states or valencies are seemingly fixed. However, whereas gold is generally considered to exist as only gold(I) and gold(III), theoretically, a 2+ oxidation state should exist to fill the gap in the homologous series of the coinage metal ions copper(+II), silver(+II), gold(+II), and in the "relativistic" triad of platinum(+II), gold(+II), and mercury(+II). That gap has now been filled as chemists isolate...

Read More thumbnail image: Gold too Ions in the II oxidation state

DNA unravelled: X-rays show archaic folding origin

Date: Aug 15, 2017

Author: David Bradley

New X-ray crystallographic work by scientists at the Howard Hughes Medical Institute reveals that organisms with cell nuclei, eukaryotes, which includes all multicellular life uses proteins to pack its DNA into the cell nucleus using similar folding techniques as that seen in microbes whose ancestry stretches back to the dawn of life on earth, the archaea.

Read More thumbnail image: DNA unravelled X-rays show archaic folding origin

Journal Highlight: Elimination of matrix interferences in GC-MS analysis of pesticides by entropy minimization

Date: Aug 14, 2017

Author: spectroscopyNOW

An entropy minimization technique that can eliminate the need for comprehensive preprocessing steps has been developed to detect organophosphorus pesticides in a fortified orange juice sample by GC/MS.

Read More thumbnail image: Journal Highlight Elimination of matrix interferences in GC-MS analysis of pesticides by entropy minimization

Journal Highlight: Raman study of graphene nanoribbon analogs confined in single-walled carbon nanotubes and their high-pressure transformations

Date: Aug 10, 2017

Author: spectroscopyNOW

High-pressure transformation of single wall carbon nanotubes filled with perylene molecules that form short-chain nanoribbon analogs inside the tubes has been studied by Raman spectroscopy combined with theoretical simulation.

Read More thumbnail image: Journal Highlight Raman study of graphene nanoribbon analogs confined in single-walled carbon nanotubes and their high-pressure transformations

Journal Highlight: Attomol-level ATP bioluminometer for detecting single bacterium

Date: Aug 8, 2017

Author: spectroscopyNOW

An automated high-sensitive ATP bioluminometer with ultra-high sensitivity has been developed for detecting single bacteria.

Read More thumbnail image: Journal Highlight Attomol-level ATP bioluminometer for detecting single bacterium

Journal Highlight: Application of mass spectrometry in the characterization of chemicals in coal-derived liquids

Date: Aug 8, 2017

Author: spectroscopyNOW

The characterization of hydrocarbon, oxygen-containing, nitrogen-containing, sulfur-containing and halogen-containing chemicals in various coal-derived liquids by GC/MS, GCxGC-TOFMS and FTICR MS has been reviewed.

Read More thumbnail image: Journal Highlight Application of mass spectrometry in the characterization of chemicals in coal-derived liquids

Journal Highlight: Three-dimensional single-cell imaging with X-ray waveguides in the holographic regime

Date: Aug 8, 2017

Author: spectroscopyNOW

X-ray tomography of single biological cells in a low-dose regime, based on full-field holographic recordings, has been extended to eliminate the bottleneck of phase retrieval and cope with high noise.

Read More thumbnail image: Journal Highlight Three-dimensional single-cell imaging with X-ray waveguides in the holographic regime

Swabbing gunshot residues: Touch spray mass spectrometry for on-site analysis

Date: Aug 1, 2017

Author: Steve Down

Organic gunshot residues that have been deposited on human hands and other surfaces after shooting a weapon can be analysed in the field by swab touch spray mass spectrometry, eliminating sample preparation and reducing waiting times.

Read More thumbnail image: Swabbing gunshot residues Touch spray mass spectrometry for on-site analysis

Extended human proteome: Multishot procedure for single cell types

Date: Aug 1, 2017

Author: Steve Down

A novel strategy for deriving comprehensive human proteomes that relies on the offline HPLC separation of multiple injections of protein digests followed by fast scanning tandem mass spectrometry has identified more than 14,000 protein isoforms from a single human cell line.

Read More thumbnail image: Extended human proteome Multishot procedure for single cell types

Hydrophilic interactions change along with volume fractions

Date: Aug 1, 2017

Author: Ryan De Vooght-Johnson

Hydrophilic interaction liquid chromatography (HILIC) is a relatively new method, so theoretical work on the relationships between its parameters is not as extensive as with older techniques. Scientists from the University of Belgrade looked at the association between peak retention and mobile phase composition for HILIC on the antipsychotic drug olanzapine and its impurities using various theoretical models.

Read More thumbnail image: Hydrophilic interactions change along with volume fractions
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