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

Review of optical fibre probes for enhanced Raman sensing

Published: Jun 6, 2017

Author(s): Cong Wang, Lihua Zeng, Zhen Li, Daoliang Li

Journal: Journal of Raman Spectroscopy

Raman scattering is a photon‐molecular interaction based on the kinetic modes of an analyte. It offers unique fingerprint‐type signals that allow molecular identification. A serious challenge frequently encountered in Raman measurements arises from the requirements of fast, real‐time remote sensing, fluorescence suppression, ultra‐micro concentration detection, small sample volumes and label‐free biological specimens. This review focuses...

Read More thumbnail image: Review of optical fibre probes for enhanced Raman sensing

1 H NMR application in characterizing the refinery products of gasoline

Published: Jun 6, 2017

Author(s): Cheng Sun, Zhixiao Wang

Journal: Concepts in Magnetic Resonance Part A

Abstract We report on an application of 1H NMR spectroscopy in characterizing the gasoline properties of its refinery products. In this work, a variety of gasoline samples obtained from different refinery stages are studied, and the aromatic, olefin, and paraffin contents as well as the octane number (ON) of the gasoline samples are characterized by 1H NMR. The properties of two product gasoline samples are also studied by 1H NMR spectroscopy;...

Read More thumbnail image: 1 H NMR application in characterizing the refinery products of gasoline

The development of statistical ToFSIMS applied to minerals recovery by froth flotation

Published: Jun 6, 2017

Author(s): Roger St. C. Smart, Andrea R. Gerson, Mark C. Biesinger, Brian R. Hart

Journal: Surface and Interface Analysis

The role of surface chemistry in recovery of minerals is central to several processes such as froth flotation, leaching, and electrostatic separation. In separation of base metals (eg, Cu, Pb, Zn, and Ni) by froth flotation of their minerals, usually sulphides, the attachment of these mineral particles, after hydrophobic collector addition, to air bubbles is used in operation. The stability of this bubble/particle attachment in both pulp...

Read More thumbnail image: The development of statistical ToF  SIMS applied to minerals recovery by froth flotation

Development and validation of an LC‐ESI‐MS/MS approach to determine a highly hydrophobic drug, norcantharidin palmitate, and apply to a preliminary pharmacokinetic study in rats

Published: Jun 5, 2017

Author(s): Xiaolin Liu, Xiaoguang Tao, Qi Zheng, Hang Xu, Yu Zhang, Tian Lei, Tian Yin, Haibing He, Xing Tang

Journal: Biomedical Chromatography

Abstract In order to investigate the pharmacokinetics of norcantharidin palmitate (NCTD‐PAL) in rats, we developed and validated an LC‐ESI‐MS/MS method. The NCTD‐PAL and internal standard (triamcinoloneacetonide palmitate, TAP) were separated on a Phenomenex Kinetex®XB C18 column, and the mobile phase was composed of tetrahydrofuran (THF)–acetonitrile (20/80, v/v) and an aqueous phase containing 0.2% ammonium hydroxide at a flow rate of...

Read More thumbnail image: Development and validation of an LCESIMSMS approach to determine a highly hydrophobic drug norcantharidin palmitate and apply to a preliminary pharmacokinetic study in rats

Oligonucleotide probes functionalization of nanogap electrodes

Published: Jun 5, 2017

Author(s): Rosa Letizia Zaffino, Mònica Mir, Josep Samitier

Journal: ELECTROPHORESIS

Nanogap electrodes have attracted a lot of consideration as promising platform for molecular electronic and biomolecules detection. This is mainly for their higher aspect ratio, and because their electrical properties are easily accessed by current‐voltage measurements. Nevertheless, application of standard current‐voltages measurements used to characterize nanogap response, and/or to modify specific nanogap electrodes properties,...

Read More thumbnail image: Oligonucleotide probes functionalization of nanogap electrodes

A spectroscopic study of leak failures in cross‐linked polyethylene tubing used in domestic water supply systems

Published: Jun 2, 2017

Author(s): Mary Jane Walzak, N. Stewart McIntyre, O. Manuel Uy

Journal: Surface and Interface Analysis

Recent leak failures in cross‐linked polyethylene tubing from several US locations have been studied using microscopy and microscopic spectroscopy. Such failures compromise the use of a material that has been regarded as more environmentally sustainable. The failures appear to be the result of local chemical attack by aqueous chlorine that reacts with the polymer, leading to its oxidation, decrystallization and expansion of its volume....

Read More thumbnail image: A spectroscopic study of leak failures in crosslinked polyethylene tubing used in domestic water supply systems

Design matrices and modelling

Published: Jun 2, 2017

Author(s): Richard G. Brereton

Journal: Journal of Chemometrics

Read More thumbnail image: Design matrices and modelling

Tenth Winter Symposium on Chemometrics (WSC10)

Published: Jun 1, 2017

Author(s): Andrey Bogomolov, Anastasiia Melenteva

Journal: Journal of Chemometrics

Read More thumbnail image: Tenth Winter Symposium on Chemometrics WSC10

Polarized Raman spectroscopy of delta‐BiB 3 O 6 at 7–350 K

Published: Jun 1, 2017

Author(s): E. A. Strikina, A. S. Krylov, A. S. Oreshonkov, A. V. Cherepakhin, A. N. Vtyurin

Journal: Journal of Raman Spectroscopy

BiB3O6 crystal has been characterized by Raman spectroscopy. Polarized low‐frequency spectra have been obtained. Temperature measurements have been carried out in range 7–350 K. Raman spectra have been numerically simulated with lady software package. The results of experiment confirmed the contribution of the Bi3+ ions and BO4 groups in nonlinear optical properties of BiB3O6. The studied crystal is a promising medium for up‐ and down‐Raman laser‐frequency...

Read More thumbnail image: Polarized Raman spectroscopy of deltaBiB 3 O 6 at 7350K

Identification of pyrolysis products of the new psychoactive substance 2‐amino‐1‐(4‐bromo‐2,5‐dimethoxyphenyl)ethanone hydrochloride ( bk ‐2C‐B) and its iodo analogue bk ‐2C‐I

Published: May 31, 2017

Author(s): Kelly B. Texter, Rachel Waymach, Pierce V. Kavanagh, John E. O'Brien, Brian Talbot, Simon D. Brandt, Elizabeth A. Gardner

Journal: Drug Testing and Analysis

2‐Amino‐1‐(4‐bromo‐2,5‐dimethoxyphenyl)ethanone hydrochloride (bk‐2C‐B) has recently emerged as a new psychoactive substance (NPS). It is most commonly consumed orally, although there are indications that it might also be ingested by inhalation or ‘smoking’. Information about the stability of bk‐2C‐B when exposed to heat is unavailable and the potential for pyrolytic degradation and formation of unknown substances available for inhalation prompted an...

Read More thumbnail image: Identification of pyrolysis products of the new psychoactive substance 2amino14bromo25dimethoxyphenylethanone hydrochloride  bk 2CB and its iodo analogue bk 2CI

lmplementation of the prolyl hydroxylase inhibitor Roxadustat (FG‐4592) and its main metabolites into routine doping controls

Published: May 31, 2017

Author(s): Daniel Eichner, Ryan M. Van Wagoner, Mitch Brenner, James Chou, Scott Leigh, Lee R. Wright, Lee A. Flippin, Michael Martinelli, Oliver Krug, Wilhelm Schänzer, Mario Thevis

Journal: Drug Testing and Analysis

The utility of hypoxia‐inducible factor (HIF) prolyl hydroxylase inhibitors as a therapeutic means of treating patients suffering from anaemia has been demonstrated for various clinical settings. However, besides this intended use, HIF stabilizers can be the subject of misuse in amateur and elite sports due to their erythropoietic properties, as recently proven by several cases of adverse analytical findings in doping control testing....

Read More thumbnail image: lmplementation of the prolyl hydroxylase inhibitor Roxadustat FG4592 and its main metabolites into routine doping controls

Amorphous zinc borate as a simple standard for baseline correction in Raman spectra

Published: May 31, 2017

Author(s): Aurelio Sanz‐Arranz, Jose A. Manrique‐Martinez, Jesus Medina‐Garcia, Fernando Rull‐Perez

Journal: Journal of Raman Spectroscopy

In this paper, our research group proposes a simple solution to a usual problem that appears in the Raman analysis of some substances, which is the presence of weak Raman signals, probably in combination with a high‐intensity luminescence background, affected by the presence of distortions in the baseline. Under this condition, the spectroscopist has to face spectra hard to edit and correct and thus hard to study. There are already some...

Read More thumbnail image: Amorphous zinc borate as a simple standard for baseline correction in Raman spectra

Comparative micro‐Raman study on standard, cross‐linked and vitamin E‐blended polyethylene acetabular cups after long‐term in vitro testing and ageing

Published: May 31, 2017

Author(s): Paola Taddei, Eleonora Pavoni, Saverio Affatato

Journal: Journal of Raman Spectroscopy

Ultra‐high molecular‐weight polyethylene has been used in total joint replacement for the last three decades. Many attempts have been made to improve the wear behaviour of this material. Highly cross‐linked polyethylene (XLPE) has been developed to decrease the wear rate, while the addition of stabilizers such as vitamin E has been proposed to slow the oxidation processes. In this study, we compared the wear behaviour...

Read More thumbnail image: Comparative microRaman study on standard crosslinked and vitamin Eblended polyethylene acetabular cups after longterm in vitro testing and ageing

Forbidden mineral assemblage coesite‐disordered graphite in diamond‐bearing kyanite gneisses (Kokchetav Massif)

Published: May 31, 2017

Author(s): Olga V. Shchepetova, Andrey Korsakov, Denis Mikhailenko, Pavel Zelenovskiy, Vladimir Shur, Hiroaki Ohfuji

Journal: Journal of Raman Spectroscopy

Confocal 2D and 3D Raman imaging was applied to SiO2 inclusions in kyanite porphyroblasts from diamond‐bearing kyanite gneisses of the Kokchetav Massif (Northern Kazakhstan). The study reveals a mineral assemblage of coesite‐disordered graphite which is forbidden in ultrahigh pressure‐high temperature (UHP‐HT) metamorphic complexes. Disordered graphite in coesite inclusions is optically undetectable and has been identified exclusively by...

Read More thumbnail image: Forbidden mineral assemblage coesitedisordered graphite in diamondbearing kyanite gneisses Kokchetav Massif

Bioconjugated graphene oxide‐based Raman probe for selective identification of SKBR3 breast cancer cells

Published: May 31, 2017

Author(s): Afua A. Antwi‐Boasiako, Derrick Dunn, Samuel S. R. Dasary, Yolanda K. Jones, Sandra L. Barnes, Anant K. Singh

Journal: Journal of Raman Spectroscopy

In this article, we demonstrate the use of bioconjugated 2D graphene oxide (bio‐GO) nanostructure to probe breast cancer cell (SKBR3) with excellent discrimination over other types of circulating tumor cell. We distinctly observed that bio‐GO nanostructure targets and binds SKBR3 cell selectively in the cell mixture. Longer incubation of SKBR3 cell with bio‐GO causes Raman signal ‘turn off’ when excited with 532‐nm laser. This is...

Read More thumbnail image: Bioconjugated graphene oxidebased Raman probe for selective identification of SKBR3 breast cancer cells

Fast and stable partial least squares modelling: A benchmark study with theoretical comments

Published: May 30, 2017

Author(s): Åke Björck, Ulf G. Indahl

Journal: Journal of Chemometrics

Algorithms for partial least squares (PLS) modelling are placed into a sound theoretical context focusing on numerical precision and computational efficiency. NIPALS and other PLS algorithms that perform deflation steps of the predictors (X) may be slow or even computationally infeasible for sparse and/or large‐scale data sets. As alternatives, we develop new versions of the Bidiag1 and Bidiag2 algorithms. These include full reorthogonalization of...

Read More thumbnail image: Fast and stable partial least squares modelling A benchmark study with theoretical comments

Centrifugal‐driven, reduced‐dimension, planar chromatography

Published: May 29, 2017

Author(s): Rachel B. Strickhouser, Nahla A. Hatab, Nickolay V. Lavrik, Michael J. Sepaniak

Journal: ELECTROPHORESIS

A fundamental problem with efficiency in capillary action driven planar chromatography results from diminishing flow rates as development proceeds, giving rise to molecular diffusion related band dispersion for most sample types. Overpressure and electrokinetic means to speed flow have been used successfully in TLC. We explore the use of centrifugal force (CF) to drive flow for reduced‐dimension planar platforms (ultra‐TLC, low micrometer...

Read More thumbnail image: Centrifugaldriven reduceddimension planar chromatography

Field identification of minerals at burning coal dumps using miniature Raman spectrometers

Published: May 26, 2017

Author(s): Košek F., Culka A., Jehlička J.

Journal: Journal of Raman Spectroscopy

Earthy, finely crystalline, weathering, and condensation products sometimes occur at the surface and subsurface of waste dumps or burning coal dumps which remain after coal mining. Surface crusts at the burning dumps of bituminous coal at Heřmanice (Silesia, Czech Republic) were investigated using a lightweight portable Raman spectrometer. The compact instrument, with 785‐nm diode excitation, allowed for the recording of good quality...

Read More thumbnail image: Field identification of minerals at burning coal dumps using miniature Raman spectrometers

Raman spectroscopy and theoretic study of hyperpolarizability effect in diiodobutenyl‐ bis ‐thioquinolinium triiodide at low temperature

Published: May 26, 2017

Author(s): I. D. Yushina, V. I. Batalov, E. V. Bartashevich, A. O. Davydov, P. S. Zelenovskiy, A. E. Masunov

Journal: Journal of Raman Spectroscopy

Various structural features, such as proton disorder or noncovalent interactions, determine the existence of switchable nonlinear optical properties under varying external conditions. Thus, for the single crystal of diiodobutenyl‐bis‐thioquinolinium triiodide with the bridge hydrogen atom, previously characterized under ambient conditions by C2/c symmetry, we have measured Raman spectra in the temperature range from 298 K down to 113 K....

Read More thumbnail image: Raman spectroscopy and theoretic study of hyperpolarizability effect in diiodobutenyl bis thioquinolinium triiodide at low temperature

In situ Raman spectroscopy investigation of the solubility and dissolution mechanism of 1,2‐dichlorobenzene in hot compressed water in a fused silica capillary reactor

Published: May 26, 2017

Author(s): Ke Bei, Jie Chen, Junliang Wang, I‐Ming Chou, Minghai Yao, Zhiyan Pan

Journal: Journal of Raman Spectroscopy

Hot compressed water (HCW), with its unique properties, is regarded as a promising solvent for industrial applications. A number of methods to measure the solubility of hydrophobic organic compounds (HOCs) in HCW have been reported. However, these methods were conducted in large‐scale stainless‐steel reactors, and few included an in situ study regarding the dissolution mechanism of HOCs in HCW during the solubility determination process. In this...

Read More thumbnail image: In situ Raman spectroscopy investigation of the solubility and dissolution mechanism of 12dichlorobenzene in hot compressed water in a fused silica capillary reactor
Page:   Prev 19 20 21 22 23 24 25 26 27 28 29 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