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

Basalt fibers grafted with a poly(ionic liquids) coating for in‐tube solid‐phase microextraction

Published: Jul 11, 2018

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

Journal: Journal of Separation Science

Abstract To improve the durability and extraction efficiency of an ionic liquid coating, 1‐dodecyl‐3‐vinylimidazolium bromide was polymerized and grafted onto basalt fibers for in‐tube solid‐phase microextraction. To develop an extraction tube, basalt fibers grafted with the poly(ionic liquids) coating were filled into a polyether ether ketone tube with a 0.75 mm inner diameter. The extraction tube was connected to...

Read More thumbnail image: Basalt fibers grafted with a polyionic liquids coating for intube solidphase microextraction

Graphene‐coated magnetic‐sheet solid‐phase extraction followed by high‐performance liquid chromatography with fluorescence detection for the determination of aflatoxins B 1 , B 2 , G 1 , and G 2 in soy‐based samples

Published: Jul 11, 2018

Author(s): Nina Nouri, Hassan Sereshti, Ali Farahani

Journal: Journal of Separation Science

Abstract A new method named graphene‐coated magnetic‐sheet solid‐phase extraction based on a magnetic three‐dimensional graphene sorbent was developed for the extraction of aflatoxins prior to high‐performance liquid chromatography with fluorescence detection. The use of a perforated magnetic‐sheet for fixing the magnetic nanoparticles is a new feature of the method. Hence, the adsorbent particles can be separated from sample...

Read More thumbnail image: Graphenecoated magneticsheet solidphase extraction followed by highperformance liquid chromatography with fluorescence detection for the determination of aflatoxins B 1  B 2  G 1  and G 2 in soybased samples

Molecularly imprinted covalent organic polymers for the selective extraction of benzoxazole fluorescent whitening agents from food samples

Published: Jul 11, 2018

Author(s): Hui Ding, Rongyu Wang, Xiao Wang, Wenhua Ji

Journal: Journal of Separation Science

Abstract Molecularly imprinted covalent organic polymers were constructed by an imine‐linking reaction between 1,3,5‐triformylphloroglucinol and 2,6‐diaminopyridine and used for the selective solid‐phase extraction of benzoxazole fluorescent whitening agents from food samples. Binding experiments showed that imprinting sites on molecularly imprinted polymers had higher selectivity for targets compared with those of the corresponding...

Read More thumbnail image: Molecularly imprinted covalent organic polymers for the selective extraction of benzoxazole fluorescent whitening agents from food samples

Hypercrosslinked polymeric restricted access materials for analysis of biological fluids

Published: Jul 11, 2018

Author(s): Alekxander Popov, Zinaida K. Blinnikova, Maria P. Tsyurupa, Vadim A. Davankov

Journal: Journal of Separation Science

Abstract New restricted access materials based on microporous hypercrosslinked polystyrene have been developed. The materials are aimed to use as packings for solid‐phase extraction cartridges to isolate low‐molecular‐weight analytes from biological fluids (for instance, blood plasma or serum). Two features distinguish these polymers from all known restricted access materials. The first one consists of the microporous...

Read More thumbnail image: Hypercrosslinked polymeric restricted access materials for analysis of biological fluids

Magnetic solid‐phase extraction of benzoylurea insecticides by Fe 3 O 4 nanoparticles decorated with a hyper‐cross‐linked porous organic polymer

Published: Jul 11, 2018

Author(s): Qianqian Wang, Juanjuan Wu, Lin Hao, Qiuhua Wu, Chun Wang, Zhi Wang

Journal: Journal of Separation Science

Abstract A magnetic polytriphenylamine porous organic polymer was prepared through simple self‐polycondensation of triphenylamine followed by coprecipitation with Fe2+ and Fe3+. It was applied as a magnetic adsorbent for the extraction of six benzoylurea insecticides from tomato, cucumber, and watermelon samples before their high‐performance liquid chromatography and mass spectral detection. Under the optimized experimental ...

Read More thumbnail image: Magnetic solidphase extraction of benzoylurea insecticides by Fe 3 O 4 nanoparticles decorated with a hypercrosslinked porous organic polymer

Urinary l ‐kynurenine quantification and selective extraction through a molecularly imprinted solid‐phase extraction device

Published: Jul 11, 2018

Author(s): Lucia Mergola, Ciriana Orabona, Elisa Albini, Giuseppe Vasapollo, Sonia Scorrano, Roberta Del Sole

Journal: Journal of Separation Science

Abstract l‐Kynurenine is an endogenous metabolite generated by the catabolic pathway of l‐tryptophan and it could be a potential biomarker to test the efficacy of several checkpoint inhibitors that have already reached the clinical trials in the antitumor therapy. Thus, a molecularly imprinted polymer specific for the recognition of this metabolite was synthesized and used as innovative system in solid‐phase extraction technique for the...

Read More thumbnail image: Urinary l kynurenine quantification and selective extraction through a molecularly imprinted solidphase extraction device

Filter‐based emulsification microextraction as an efficient method for the determination of chlorophenols by gas chromatography

Published: Jul 11, 2018

Author(s): Mohammad Bazregar, Maryam Rajabi, Yadollah Yamini, Alireza Asghari

Journal: Journal of Separation Science

Abstract In this work, an efficient microextraction method was applied for the extraction of some chlorophenols in water samples. This method, termed filter‐based emulsification microextraction, is based on the dispersion of an extractant into an aqueous sample solution to accelerate the extraction process and the utilization of a Nylon syringe filter to break the emulsion. After phase separation, the method is coupled with gas...

Read More thumbnail image: Filterbased emulsification microextraction as an efficient method for the determination of chlorophenols by gas chromatography

Characterization of Klason lignin samples isolated from beech and aspen using microbore column size‐exclusion chromatography

Published: Jul 11, 2018

Author(s): Erik Beňo, Róbert Góra, Milan Hutta

Journal: Journal of Separation Science

Abstract The present study is focused on the separation and characterization of lignin samples isolated by Klason method from European beech (Fagus sylvatica) broadleaf hardwood and European aspen (Populus tremula) broadleaf softwood by size‐exclusion chromatography. The separation was carried out using dimethylformamide as major component of the mobile phase and a 3 mm id microbore column packed with hydroxyethyl methacrylate gel,...

Read More thumbnail image: Characterization of Klason lignin samples isolated from beech and aspen using microbore column sizeexclusion chromatography

Hyper‐spectral Raman imaging correlating chemical substitution and crystallinity in biogenic hydroxyapatite: Dentin and enamel in normal and hypoplastic human teeth

Published: Jul 11, 2018

Author(s): Ping Wang, Evan J.D. Anderson, Eric A. Muller, Fuhua Gao, Yisi Zhong, Markus B. Raschke

Journal: Journal of Raman Spectroscopy

Abstract Micro‐Raman imaging and spectroscopy has become an established technique for the characterization of biogenic hydroxyapatite as, for example, the primary constituent of human teeth. However, few studies have yet gone beyond a qualitative analysis of the Raman response providing only limited insight into spatial heterogeneity of composition, structure, and degree of crystallinity. Here, we show how correlative electron...

Read More thumbnail image: Hyperspectral Raman imaging correlating chemical substitution and crystallinity in biogenic hydroxyapatite Dentin and enamel in normal and hypoplastic human teeth

Graybody radiation phenomena in a fractional manner

Published: Jul 11, 2018

Author(s): Merve Uzun, Hüseyin Şirin, Abdullah Engin Çalık, Kazım Gökhan Atman

Journal: X-Ray Spectrometry

In this paper, the graybody radiation phenomena has been handled with the help of fractional calculus. Fractional definition of graybody spectrum has been written in terms of Mittag‐Leffler function. The obtained data from fractional calculus approximation for nearly 2.87 × 107 K have been compared with literature values and standard blackbody radiation.

Read More thumbnail image: Graybody radiation phenomena in a fractional manner

Proof of active cannabis use comparing 11‐hydroxy‐∆9‐tetrahydrocannabinol with 11‐nor‐9‐carboxy‐tetrahydrocannabinol concentrations

Published: Jul 10, 2018

Author(s): Thomas Franz, Gisela Skopp, Gerlinde Schwarz, Frank Musshoff

Journal: Drug Testing and Analysis

Abstract Testing hair for cannabis use has increasingly been scrutinised due to exposure to second‐hand smoke or environmental contamination. Confirmation of drug use involving detection of metabolites such as 11‐nor‐9‐carboxy‐delta‐9‐tetrahydrocannabinol (THC‐COOH) and 11‐hydroxy‐delta‐9‐tetrahydrocannabinol (THC‐OH) having very rarely been considered. We developed a new, simplified procedure with regard to expenditure of time and...

Read More thumbnail image: Proof of active cannabis use comparing 11hydroxy9tetrahydrocannabinol with 11nor9carboxytetrahydrocannabinol concentrations

Temperature‐dependent absorption lines observation in Raman spectra of SmFe 3 (BO 3 ) 4 ferroborate

Published: Jul 10, 2018

Author(s): Evgeniya Moshkina, Irina Gudim, Vladislav Temerov, Alexander Krylov

Journal: Journal of Raman Spectroscopy

Abstract The paper demonstrates possibilities of observation and thermal dependency study of the absorption lines as a co‐product of Raman spectroscopy study in SmFe3 (BO3)4 ferroborate. Raman spectra of the ferroborate were studied in a wide temperature range (T = 10÷300 K). Temperature‐dependent absorption lines sensitive to the magnetic phase transition have been observed in Raman spectra at two spectral ranges. ...

Read More thumbnail image: Temperaturedependent absorption lines observation in Raman spectra of SmFe 3 BO 3  4 ferroborate

In‐situ high‐temperature Raman spectroscopic studies of the vibrational characteristics and microstructure evolution of sodium tungstate dihydrate crystal during heating and melting

Published: Jul 10, 2018

Author(s): Jian Wang, Jinglin You, Min Wang, Liming Lu, Alexander A. Sobol, Songming Wan

Journal: Journal of Raman Spectroscopy

Abstract In‐situ studies of the vibrational characteristics and microstructure evolution of the Na2WO4·2H2O (sodium tungstate dihydrate) crystal during the temperature‐induced solid‐state phase transformation and melting process were carried out using high‐temperature Raman spectroscopic technique. Results showed that the thermal decomposition process of the Na2WO4·2H2O crystal takes place mainly within the temperature range of 348–383 K,...

Read More thumbnail image: Insitu hightemperature Raman spectroscopic studies of the vibrational characteristics and microstructure evolution of sodium tungstate dihydrate crystal during heating and melting

Fullerene as a doxorubicin nanotransporter for targeted breast cancer therapy: Capillary electrophoresis analysis

Published: Jul 10, 2018

Author(s): Marta Kepinska, Rene Kizek, Halina Milnerowicz

Journal: ELECTROPHORESIS

Abstract The clinical use of doxorubicin (DOX) is limited by dose‐related cardiomyopathy, which becomes more prevalent with increasing cumulative doses of the drug. Complexes of fullerene with DOX were designed and studied using biophysical methods. The ability of DOX to release from fullerene at different pHs was analyzed. It has been shown that the size of the fullerene‐DOX complexes was ∼280 nm. The zeta potential for fullerene...

Read More thumbnail image: Fullerene as a doxorubicin nanotransporter for targeted breast cancer therapy Capillary electrophoresis analysis

Forensic applicability of multi‐allelic InDels with mononucleotide homopolymer structures

Published: Jul 10, 2018

Author(s): Shu Zhang, Qiang Zhu, Xiaogang Chen, Yuancun Zhao, Xiaohong Zhao, Yiwen Yang, Zehua Gao, Ting Fang, Yufang Wang, Ji Zhang

Journal: ELECTROPHORESIS

Abstract Insertion/deletion polymorphisms (InDels), which possess the characteristics of low mutation rates and a short amplicon size, have been regarded as promising markers for forensic DNA analysis. InDels can be classified as bi‐allelic or multi‐allelic, depending on the number of alleles. Many studies have explored the use of bi‐allelic InDels in forensic applications, such as individual identification and ancestry inference....

Read More thumbnail image: Forensic applicability of multiallelic InDels with mononucleotide homopolymer structures

Selecting microhaplotypes optimized for different purposes

Published: Jul 10, 2018

Author(s): Kenneth K. Kidd, Andrew J. Pakstis, William C. Speed, Robert Lagace, Sharon Wootton, Joseph Chang

Journal: ELECTROPHORESIS

Abstract Massively parallel sequencing is transforming forensic work by allowing various useful forensic markers, such as STRPs and SNPs, to be multiplexed providing information on ancestry, individual and familial identification, phenotypes for eye/hair/skin pigmentation, and the deconvolution of mixtures. Microhaplotypes also become feasible with massively parallel sequencing, these are DNA segments (smaller than 300 nucleotides)...

Read More thumbnail image: Selecting microhaplotypes optimized for different purposes

Integrative Analysis of Proteome and Ubiquitylome Reveals Unique Features of Lysosomal and Endocytic Pathways in Gefitinib‐Resistant Non‐Small Cell Lung Cancer Cells

Published: Jul 9, 2018

Author(s): Wang Li, Heyong Wang, Yan Yang, Tian Zhao, Zhixiong Zhang, Ye Tian, Zhaomie Shi, Xiaojun Peng, Fei Li, Yonghong Feng, Lei Zhang, Gening Jiang, Fan Zhang

Journal: PROTEOMICS

Abstract Non‐small cell lung cancer (NSCLC) patients carrying EGFR activating mutations treated with gefitinib, a tyrosine kinase inhibitor, will develop drug resistance. Ubiquitylation is one of major posttranslational modifications of proteins affecting the stability or function of proteins. However, the role of protein ubiquitylation in gefitinib resistance is poorly understood. To systematically identify the global change in...

Read More thumbnail image: Integrative Analysis of Proteome and Ubiquitylome Reveals Unique Features of Lysosomal and Endocytic Pathways in GefitinibResistant NonSmall Cell Lung Cancer Cells

Proteomic Analysis of Synaptoneurosomes Highlights the Relevant Role of Local Translation in the Hippocampus

Published: Jul 9, 2018

Author(s): Itziar Benito, Juan José Casañas, María Luz Montesinos

Journal: PROTEOMICS

Abstract Several proteomic analyses have been performed on synaptic fractions isolated from cortex or even total brain, resulting in preparations with a high synaptic heterogeneity and complexity. Synaptoneurosomes (SNs) are subcellular membranous elements that contain sealed pre‐ and post‐synaptic components. They are obtained by subcellular fractionation of brain homogenates and serve as a suitable model to study many aspects of...

Read More thumbnail image: Proteomic Analysis of Synaptoneurosomes Highlights the Relevant Role of Local Translation in the Hippocampus

Clinical Proteomics: Closing the Gap from Discovery to Implementation

Published: Jul 9, 2018

Author(s): Maria Frantzi, Agnieszka Latosinska, Georgia Kontostathi, Harald Mischak

Journal: PROTEOMICS

Abstract Clinical proteomics, the application of proteome analysis to serve a clinical purpose, represents a major field in the area of proteome research. Over 1000 manuscripts on this topic are published each year, with numbers continuously increasing. However, the anticipated outcome, the transformation of the reported findings into improvements in patient management, is not immediately evident. In this article, the value and...

Read More thumbnail image: Clinical Proteomics Closing the Gap from Discovery to Implementation

Chromatographic behavior of new deazapurine ribonucleosides in hydrophilic interaction liquid chromatography

Published: Jul 9, 2018

Author(s): Květa Kalíková, Markéta Voborná, Eva Tesařová

Journal: ELECTROPHORESIS

Abstract The chromatographic behavior of new biogenic purine nucleosides in hydrophilic interaction liquid chromatography was examined on three different stationary phases, namely bare silica, and amide‐ and cyclofructan‐based stationary phases. The effects of buffer concentration, pH and acetonitrile‐to‐aqueous‐part ratio in the mobile phase on retention and peak shape were assessed. The retention coefficients and peak symmetry...

Read More thumbnail image: Chromatographic behavior of new deazapurine ribonucleosides in hydrophilic interaction liquid chromatography
Page:   Prev 1 2 3 4 5 6 7 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 spectroscopy? Visit our sister site spectroscopyNOW.com

Copyright © 2018 John Wiley & Sons, Inc. All Rights Reserved