EarlyView Articles

Skip to Navigation

The very latest articles from the scientific literature
on Wiley Online Library...


You can keep up-to date on these EarlyView articles, which focus on spectroscopy
and separation science:

Earlyview RSS Feed

rss

Filter by Journal

Browse By Journal

Comparative Proteomic Analysis of Three Xanthomonas spp. Cultured in Minimal and Rich Media

Published: Nov 20, 2017

Author(s): Hye‐Jee Park, Nahee Bae, Hanbi Park, Dae‐Wi Kim, Sang‐Wook Han

Journal: PROTEOMICS

Abstract Bacteria change their gene expression when exposed to different nutrient conditions. The levels of proteins do not always correlate with those of RNAs, hence proteomic analysis is required for understanding how bacteria adapt to different conditions. Herein, differentially abundant proteins from Xanthomonas oryzae pv. oryzae (Xoo), X. campestris pv. vesicatoria (Xcv), and X. axonopodis pv. glycines (Xag), which were cultured in rich...

Read More thumbnail image: Comparative Proteomic Analysis of Three Xanthomonas spp_ Cultured in Minimal and Rich Media

Raman‐scattering studies of pressure‐induced phase transitions in perovskite‐like acetamidninium manganese formate

Published: Nov 20, 2017

Author(s): Mirosław Mączka, Tercio Almeida Silva, Waldeci Paraguassu

Journal: Journal of Raman Spectroscopy

Abstract We report high‐pressure Raman scattering studies of acetamidninium manganese formate, which show evidence for two pressure‐induced phase transitions between 0.7 and 1.4 GPa and above 5.3 GPa. The first transition is related to distortion of the manganese formate framework whereas the second one affects significantly the structure of the acetamidinium cation. Significant narrowing of the lattice bands suggests that...

Read More thumbnail image: Ramanscattering studies of pressureinduced phase transitions in perovskitelike acetamidninium manganese formate

In vitro metabolism of the synthetic cannabinoids CUMYL‐PINACA, 5F–CUMYL‐PINACA, CUMYL‐4CN‐BINACA, 5F–CUMYL‐P7AICA and CUMYL‐4CN‐B7AICA

Published: Nov 20, 2017

Author(s): Sandra N. Staeheli, Michael Poetzsch, Veronica P. Veloso, Michael Bovens, Christian Bissig, Andrea E. Steuer, Thomas Kraemer

Journal: Drug Testing and Analysis

Abstract Synthetic cannabinoid consumption trends underlie fast changes and provide several challenges to clinical and forensic toxicologists. Due to their extensive metabolism, parent compounds are hardly detectable in urine. Therefore, knowledge of the metabolism of synthetic cannabinoids is essential to allow their detection in biological matrices. The aim of the present study was the elucidation of the metabolism of...

Read More thumbnail image: In vitro metabolism of the synthetic cannabinoids CUMYLPINACA 5FCUMYLPINACA CUMYL4CNBINACA 5FCUMYLP7AICA and CUMYL4CNB7AICA

Submicron Raman spectroscopy mapping of serpentinite fault rocks

Published: Nov 20, 2017

Author(s): Jeremy S. Rooney, Matthew S. Tarling, Steven A.F. Smith, Keith C. Gordon

Journal: Journal of Raman Spectroscopy

Abstract Submicron Raman spectroscopy mapping is able to unambiguously distinguish the main serpentine minerals within their in situ microstructural context. The high spatial resolution (~370 nm), large‐area coverage (up to hundreds of micrometres in each dimension), and ability to map directly on polished thin sections allows novel interpretations to be made regarding the nature and evolution of serpentinite fault rock...

Read More thumbnail image: Submicron Raman spectroscopy mapping of serpentinite fault rocks

Screening and separation of α‐amylase inhibitors from Solanum nigrum with amylase‐functionalized magnetic graphene oxide combined with high‐speed counter‐current chromatography

Published: Nov 20, 2017

Author(s): Yin Cen, Aiping Xiao, Xiaoqing Chen, Liangliang Liu

Journal: Journal of Separation Science

Abstract A screening method using α‐amylase‐functionalized magnetic graphene oxide combined with high‐speed counter‐current chromatography was proposed and utilized to screen and separate α‐amylase inhibitors from extract of Solanum nigrum. The α‐amylase‐functionalized magnetic graphene oxide was characterized and found to demonstrate satisfactory structure, magnetic response (24.5 emu/g), and reusability (retained 90% of initial activity...

Read More thumbnail image: Screening and separation of amylase inhibitors from Solanum nigrum with amylasefunctionalized magnetic graphene oxide combined with highspeed countercurrent chromatography

The role of graphene‐based sorbents in modern sample preparation techniques

Published: Nov 20, 2017

Author(s): Ana Lúcia de Toffoli, Edvaldo Vasconcelos Soares Maciel, Bruno Henrique Fumes, Fernando Mauro Lanças

Journal: Journal of Separation Science

Abstract The application of graphene‐based sorbents in sample preparation techniques has increased significantly since 2011. These materials have good physicochemical properties to be used as sorbent and have shown excellent results in different sample preparation techniques. Graphene and its precursor graphene oxide have been considered to be good candidates to improve the extraction and concentration of different classes of target...

Read More thumbnail image: The role of graphenebased sorbents in modern sample preparation techniques

LC–MS/MS method for quantification of baclofen in hair: A useful tool to assess compliance in alcohol dependent patients?

Published: Nov 17, 2017

Author(s): I.A. Larabi, N. Fabresse, A. Knapp, M. Forcet, F.J. Baud, G. Lorin de la Grandmaison, J.C. Alvarez

Journal: Drug Testing and Analysis

Abstract To evaluate adherence to treatment, we developed and validated a novel liquid chromatography–tandem mass spectrometry (LC–MS/MS) method for baclofen quantification in hair.Twenty mg was washed twice with dichloromethane, incubated in phosphate buffer (pH 5) for 10 minutes at 95°C, then extracted by liquid‐liquid extraction in alkaline condition. Baclofen‐d4 was used as the internal standard. This method was applied to assess compliance...

Read More thumbnail image: LCMSMS method for quantification of baclofen in hair A useful tool to assess compliance in alcohol dependent patients

PTCA (1H‐pyrrole‐2,3,5‐tricarboxylic acid) as a marker for oxidative hair treatment

Published: Nov 17, 2017

Author(s): Silvana Petzel‐Witt, Sylvia I. Meier, Manfred Schubert‐Zsilavecz, Stefan W. Toennes

Journal: Drug Testing and Analysis

Abstract Hair analysis for the assessment of alcohol or drug abstinence has become a routine procedure in forensic toxicology. Hair coloration leading to loss of incorporated xenobiotics and to false negative results has turned out to be a major problem. Currently only colored extracts provide hints of manipulations but not bleaching. A liquid chromatographic–tandem mass spectrometric (LC–MS/MS) method was developed and validated to...

Read More thumbnail image: PTCA 1Hpyrrole235tricarboxylic acid as a marker for oxidative hair treatment

Raman spectroscopic measurements of ν 1 band of hydrogen sulfide over a wide range of temperature and density in fused‐silica optical cells

Published: Nov 17, 2017

Author(s): Lei Jiang, Yang Xin, I‐Ming Chou, Ying Chen

Journal: Journal of Raman Spectroscopy

Abstract A method was developed to determine the fluid density of pure hydrogen sulfide (H2S) at a fixed temperature using Raman spectroscopic measurements. The positions of the H2S Raman ν1 band were measured at a wide range of temperatures (188.15 K ≤ T ≤ 633.15 K) and pressures (P ≤ 506 bar) using fused‐silica capillary capsules and high‐pressure optical cells. The relation among H2S density (ρ), H2S ν1 peak position,...

Read More thumbnail image: Raman spectroscopic measurements of  1 band of hydrogen sulfide over a wide range of temperature and density in fusedsilica optical cells

Retention behavior of flavonoids on immobilized artificial membrane chromatography and correlation with cell‐based permeability

Published: Nov 17, 2017

Author(s): Fotios Tsopelas, Maria Tsagkrasouli, Pavlos Poursanidis, Maria Pitsaki, George Vasios, Panagiotis Danias, Irene Panderi, Anna Tsantili‐Kakoulidou, Constantinos Giaginis

Journal: Biomedical Chromatography

Abstract The aim of the study was to investigate the immobilized artificial membrane (IAM) retention mechanism for a set of flavonoids and to evaluate the potential of IAM chromatography to model Caco‐2 permeability. For this purpose, the retention behavior of 41 flavonoid analogs on two IAM stationary phases, IAM.PC.MG and IAM.PC.DD2, was investigated. Correlations between retention factors, logkw(IAM) and octanol–water...

Read More thumbnail image: Retention behavior of flavonoids on immobilized artificial membrane chromatography and correlation with cellbased permeability

Probing nitrite ion dynamics in Na NO 2 crystals by solid‐state 17 O NMR

Published: Nov 17, 2017

Author(s): Yizhe Dai, Ivan Hung, Zhehong Gan, Gang Wu

Journal: Concepts in Magnetic Resonance Part A

Abstract We report a solid‐state 17O (I = 5/2) NMR study of the nitrite ion dynamics in crystalline NaNO2. Variable temperature (VT) 17O NMR spectra were recorded at 3 magnetic fields, 11.7, 14.1, and 21.1 T. The VT 17O NMR data suggest that the NO 2 − ion in the ferroelectric phase of NaNO2 undergoes 2‐fold flip...

Read More thumbnail image: Probing nitrite ion dynamics in Na NO 2 crystals by solidstate 17 O NMR

Advanced online mass spectrometry detection of proteins separated by capillary isoelectric focusing after sequential injection

Published: Nov 17, 2017

Author(s): Csilla Páger, Nikoleta Biherczová, Roland Ligetvári, Balázs Viktor Berkics, Tamás Pongrácz, Viktor Sándor, Anita Bufa, Viktória Poór, Andrea Vojs Staňová, Ferenc Kilár

Journal: Journal of Separation Science

Abstract Capillary isoelectric focusing hyphenated with mass spectrometry detection, following the sequential injection of the carrier ampholytes and the sample zone, is highly efficient for the characterization of proteins. The main advantage of the sequential injection protocol is that ampholytes, with pH ranges, which are not supposed to cover the isoelectric points of the sample components, can be used for separation. The method...

Read More thumbnail image: Advanced online mass spectrometry detection of proteins separated by capillary isoelectric focusing after sequential injection

How to model temporal changes in nontargeted metabolomics study? A Bayesian multilevel perspective

Published: Nov 17, 2017

Author(s): Paweł Wiczling, Emilia Daghir‐Wojtkowiak, Arlette Yumba Mpanga, Damian Szczesny, Roman Kaliszan, Michał Jan Markuszewski

Journal: Journal of Separation Science

Abstract Analysis of time series data addresses the question on mechanisms underlying normal physiology and its alteration under pathological conditions. However, adding time variable to high‐dimension, collinear, noisy data is a challenge in terms of mining and analysis. Here, we used Bayesian multilevel modeling for time series metabolomics in vivo study to model different levels of random effects occurring as a consequence of...

Read More thumbnail image: How to model temporal changes in nontargeted metabolomics study A Bayesian multilevel perspective

Electrophoretic deposition strategy for the fabrication of highly stable functionalized silica nanoparticle coatings onto nickel‐titanium alloy wires for selective solid‐phase microextraction

Published: Nov 17, 2017

Author(s): Shanshan Zhou, Huiju Wang, Panxia Jin, Ziyi Wang, Xuemei Wang, Xinzhen Du

Journal: Journal of Separation Science

Abstract A new strategy for the immobilization of phenyl‐functionalized silica nanoparticles onto nickel‐titanium alloy wires is presented. The homogeneous and compact silica nanoparticle coating was achieved on the hydrothermally treated nickel‐titanium wires with large surface area by electrophoretic deposition, and followed by self‐assembled modification of phenyltrichlorosilane. Coupled to high‐performance liquid chromatography...

Read More thumbnail image: Electrophoretic deposition strategy for the fabrication of highly stable functionalized silica nanoparticle coatings onto nickeltitanium alloy wires for selective solidphase microextraction

Poly(ionic liquids)‐coated stainless‐steel wires packed into a polyether ether ketone tube for in‐tube solid‐phase microextraction

Published: Nov 17, 2017

Author(s): Juanjuan Feng, Xiuqin Wang, Yu Tian, Chuannan Luo, Min Sun

Journal: Journal of Separation Science

Abstract An in‐tube solid‐phase microextraction device was developed by packing poly(ionic liquids)‐coated stainless‐steel wires into a polyether ether ketone tube. An anion‐exchange process was performed to enhance the extraction performance. Surface properties of poly(ionic liquids)‐coated stainless‐steel wires were characterized by scanning electron microscopy and energy dispersive X‐ray spectrometry. The extraction device was...

Read More thumbnail image: Polyionic liquidscoated stainlesssteel wires packed into a polyether ether ketone tube for intube solidphase microextraction

Development and validation of a high‐performance liquid chromatography method for determination of lisinopril in human plasma by magnetic solid‐phase extraction and pre‐column derivatization

Published: Nov 16, 2017

Author(s): Noushin Rastkari, Reza Ahmadkhaniha

Journal: Biomedical Chromatography

Abstract A sensitive, reliable and simple HPLC method was developed for the determination of lisinopril in human plasma. The method consists of extraction and clean‐up steps based on magnetic solid‐phase extraction and pre‐column derivatization with a fluorescent reagent. The mobile phase consisted of a mixture of methanol–sodium dihydrogen phosphate (pH 3.0; 0.005 m; 75:25, v/v). The flow rate was set at 0.7 mL/min. Fluorescence detection...

Read More thumbnail image: Development and validation of a highperformance liquid chromatography method for determination of lisinopril in human plasma by magnetic solidphase extraction and precolumn derivatization

Metabolite profiling of ginsenosides in rat plasma, urine and feces by LC–MS/MS and its application to a pharmacokinetic study after oral administration of Panax ginseng extract

Published: Nov 16, 2017

Author(s): Wei‐Wei Dong, Xiong‐Zhe Han, Jinhua Zhao, Fei‐Liang Zhong, Rui Ma, Songquan Wu, Donghao Li, Lin‐Hu Quan, Jun Jiang

Journal: Biomedical Chromatography

Abstract Panax ginseng is widely consumed as a functional food in the form of tea, powder, capsules, among others, and possesses a range of pharmacological activities including adaptogenic, immune‐modulatory, anti‐tumor, anti‐aging and anti‐inflammatory effects. The aim of this study was to identify and quantify the major ginsenosides and their metabolites in rat plasma, urine and feces after administration of P. ginseng extract...

Read More thumbnail image: Metabolite profiling of ginsenosides in rat plasma urine and feces by LCMSMS and its application to a pharmacokinetic study after oral administration of Panax ginseng extract

Determining the number of layers in few‐layer graphene by combining Raman spectroscopy and optical contrast

Published: Nov 16, 2017

Author(s): Maxime Bayle, Nicolas Reckinger, Alexandre Felten, Périne Landois, Ophélie Lancry, Bertrand Dutertre, Jean‐François Colomer, Ahmed‐Azmi Zahab, Luc Henrard, Jean‐Louis Sauvajol, Matthieu Paillet

Journal: Journal of Raman Spectroscopy

Raman spectroscopy is commonly used to determine the number of layers of few‐layer graphene (FLG) samples. In this work, we focus on the criteria based on the G‐band integrated intensity and on the laser optical contrast. Limitations due to stacking order are discussed and lead to the conclusion that it is necessary to combine Raman and optical contrast to avoid misinterpretation. Both methods enable to distinguish unambiguously between...

Read More thumbnail image: Determining the number of layers in fewlayer graphene by combining Raman spectroscopy and optical contrast

Three‐dimensional MoS 2 ‐NS@Au‐NPs hybrids as SERS sensor for quantitative and ultrasensitive detection of melamine in milk

Published: Nov 16, 2017

Author(s): Xiu Liang, Xiao‐Juan Zhang, Ting‐Ting You, Nan Yang, Guang‐Sheng Wang, Peng‐Gang Yin

Journal: Journal of Raman Spectroscopy

Abstract MoS2, a novel inorganic graphene analogues with typical two‐dimensional structure, has attracted increasing interest in various fields. MoS2‐based hybrid plasmonic structures have been extensively investigated as higher quality surface enhanced Raman scattering (SERS) substrates. Herein, we have designed a three‐dimensional (3D) MoS2 nanospheres (NSs) based hybrid nanostructure as SERS sensor by decorating Au nanoparticles (NPs) on the...

Read More thumbnail image: Threedimensional MoS 2 NSAuNPs hybrids as SERS sensor for quantitative and ultrasensitive detection of melamine in milk

Influence of combined iron supplementation and simulated hypoxia on the haematological module of the athlete biological passport

Published: Nov 16, 2017

Author(s): Laura A. Garvican‐Lewis, Victor L. Vuong, Andrew D. Govus, Yorck Olaf Schumacher, David Hughes, Greg Lovell, Daniel Eichner, Christopher J. Gore

Journal: Drug Testing and Analysis

Abstract The integrity of the athlete biological passport (ABP) is underpinned by understanding normal fluctuations of its biomarkers to environmental or medical conditions, for example, altitude training or iron deficiency. The combined impact of altitude and iron supplementation on the ABP was evaluated in endurance‐trained athletes (n = 34) undertaking 3 weeks of simulated live‐high: train‐low (14 h.d‐1,...

Read More thumbnail image: Influence of combined iron supplementation and simulated hypoxia on the haematological module of the athlete biological passport
Page:   Prev 6 7 8 9 10 11 12 13 14 15 16 Next

Social Links

Share This Links

Bookmark and Share

Microsites

Suppliers Selection
Societies Selection

Banner Ad

Click here to see
all job opportunities

Most Viewed

Copyright Information

Interested in separation science? Visit our sister site separationsNOW.com

Copyright © 2017 John Wiley & Sons, Inc. All Rights Reserved