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Journal Highlight: Direct determination of δ44/42Ca isotope ratio by ion chromatography/low-resolution multicollector ICPMS

Date: Dec 5, 2017

Author: separationsNOW

Polish chemists developed an ion chromatography method for measuring calcium isotopic ratio and tested it on samples of water, bone and coral.

Read More thumbnail image: Journal Highlight Direct determination of 4442Ca isotope ratio by ion chromatographylow-resolution multicollector ICPMS

Journal Highlight: Comparison of linear intrascan and interscan dynamic ranges of Orbitrap and ion-mobility time-of-flight mass spectrometers

Date: Dec 5, 2017

Author: separationsNOW

Swiss food scientists have investigated the linear intrascan and interscan dynamic ranges of high-resolution mass spectrometers when analyzing metabolites in complex samples.

Read More thumbnail image: Journal Highlight Comparison of linear intrascan and interscan dynamic ranges of Orbitrap and ion-mobility time-of-flight mass spectrometers

Journal Highlight: Metabolomics revealed the toxicity of cationic liposomes in HepG2 cells using UHPLC-Q-TOF/MS and multivariate data analysis

Date: Dec 4, 2017

Author: separationsNOW

The underlying mechanism of cytotoxicity on HepG2 cells of cationic liposomes, used in drug and gene delivery has been studied by LC/MS supported by multivariate data analysis and statistics.

Read More thumbnail image: Journal Highlight Metabolomics revealed the toxicity of cationic liposomes in HepG2 cells using UHPLC-Q-TOFMS and multivariate data analysis

Monitoring bone fracture healing: Protein signals

Date: Dec 1, 2017

Author: Steve Down

Scientists in the USA have uncovered a suite of proteins in serum that might be able to follow the progression of fracture healing and lead to the development of treatments to accelerate the process.

Read More thumbnail image: Monitoring bone fracture healing Protein signals

Box–Behnken design makes rhubarb extracts fine

Date: Dec 1, 2017

Author: Ryan De Vooght-Johnson

Medicinal rhubarb has long being used in traditional Chinese medicine, but accurate assays of its many active compounds are hampered by the expense of analytical standards. Scientists from Tianjin University and Tianjin University of Traditional Chinese Medicine have developed a new methods of assaying multiple rhubarb compounds by quantitative analysis of multi-components with a single marker (QAMS), while also optimising their extraction with a Box–Behnken design.

Read More thumbnail image: BoxBehnken design makes rhubarb extracts fine

Olive flower phenolics finish off free radicals

Date: Dec 1, 2017

Author: Ryan De Vooght-Johnson

Olives are an important commercial crop in a number of countries, but little work has been carried out on the chemical composition of olive tree flowers. Scientists from the University of Sfax in Tunisia examined the composition of olive flowers by HPLC and LC-MS, looking at changes in the compounds present and in the overall antioxidant power of the flower extracts.

Read More thumbnail image: Olive flower phenolics finish off free radicals

Stone-age sediments’ secrets seen by GC-MS

Date: Dec 1, 2017

Author: Ryan De Vooght-Johnson

Information on prehistoric societies can be obtained by examining biomarker compounds, such as lipids, from sediment layers. Researchers from the University of the Basque Country, Vitoria-Gasteiz, examined sediments from ancient manure heaps, extracting lipids that were then assayed by GC-MS, giving information on prehistoric livestock use.

Read More thumbnail image: Stone-age sediments secrets seen by GC-MS

Journal Highlight: Characterization of ancient lipids in prehistoric organic residues: Chemical evidence of livestock-pens in rock-shelters since early neolithic to bronze age

Date: Nov 27, 2017

Author: separationsNOW

Scientists in Spain used microwave-assisted extraction and solid-phase extraction to extract ancient lipids from prehistoric sediments prior to analysis by gas chromatography with mass spectrometry.

Read More thumbnail image: Journal Highlight Characterization of ancient lipids in prehistoric organic residues Chemical evidence of livestock-pens in rock-shelters since early neolithic to bronze age

Journal Highlight: Proteomic analysis of the venom of the predatory ant Pachycondyla striata (Hymenoptera: Formicidae)

Date: Nov 27, 2017

Author: separationsNOW

Scientists in Brazil used various analytical techniques, including ion-exchange chromatography, to evaluate the protein content of the venom in a species of predatory ant.

Read More thumbnail image: Journal Highlight Proteomic analysis of the venom of the predatory ant Pachycondyla striata Hymenoptera Formicidae

Journal Highlight: Tetrazole-based probes for integrated phenotypic screening, affinity-based proteome profiling, and sensitive detection of a cancer biomarker

Date: Nov 27, 2017

Author: separationsNOW

Phenotypic screening of a fully functionalized small-molecule library has been combined with competitive affinity-based proteome profiling to map and functionally characterize the targets of screening hits in drug discovery.

Read More thumbnail image: Journal Highlight Tetrazole-based probes for integrated phenotypic screening affinity-based proteome profiling and sensitive detection of a cancer biomarker
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