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Strategies and Challenges in Identifying Function for Thousands of sORF‐Encoded Peptides in Meiosis

Published: Oct 26, 2017

Author(s): Ina Hollerer, Andrea Higdon, Gloria A. Brar

Journal: PROTEOMICS

Abstract Recent genomic analyses have revealed pervasive translation from formerly unrecognized short open reading frames (sORFs) during yeast meiosis. Despite their short length, which has caused these regions to be systematically overlooked by traditional gene annotation approaches, meiotic sORFs share many features with classical genes, implying the potential for similar types of cellular functions. We found that sORF expression...

Read More thumbnail image: Strategies and Challenges in Identifying Function for Thousands of sORFEncoded Peptides in Meiosis

HPLC–MS/MS analysis of peramivir in rat plasma: Elimination of matrix effect using the phospholipid‐removal solid‐phase extraction method

Published: Oct 25, 2017

Author(s): Mingdao Lei, Wei Gan, Yongbing Sun

Journal: Biomedical Chromatography

Abstract A simple HPLC–MS/MS method has been developed for the determination of peramivir in rat plasma in the present study. The analytes were separated on a C18 column (50 × 2.1 mm, 1.7 μm) and a triple‐quadrupole mass spectrometer equipped with an electrospray ionization source was applied for the detection. A phospholipid‐free cartridge solid‐phase extraction was used to pretreat the plasma and eliminate the endogenous...

Read More thumbnail image: HPLCMSMS analysis of peramivir in rat plasma Elimination of matrix effect using the phospholipidremoval solidphase extraction method

Secreted Tumor Antigens – Immune Biomarkers for Diagnosis and Therapy

Published: Oct 25, 2017

Author(s): Els Meeusen, Elgene Lim, Suresh Mathivanan

Journal: PROTEOMICS

Abstract With the advent of immunotherapies for cancer, there is growing interest in the identification of tumor antigens. Tumor antigens are self‐molecules altered through e.g. genetic mutations (neoantigens), protein truncation, protein misfolding, or abnormal posttranslational modifications. To induce an immune response, tumor antigens need to be secreted into the tumor environment and presented to the immune system in the...

Read More thumbnail image: Secreted Tumor Antigens  Immune Biomarkers for Diagnosis and Therapy

Surface characterization of medieval silver coins minted by the early Piasts: FT‐IR mapping and SEM/EDX studies

Published: Oct 25, 2017

Author(s): Ewa Pięta, Janusz Lekki, Julio M. Hoyo‐Meléndez, Czesława Paluszkiewicz, Michał Nowakowski, Marta Matosz, Wojciech M. Kwiatek

Journal: Surface and Interface Analysis

An investigation of a numismatic collection of silver denarii from the early Piast dynasty was conducted using Fourier‐transform infrared spectroscopy. The studied coins, minted between 995 and 1020 ad under the rules of Boleslaus the Brave and Mieszko II Lambert, belong to the collection of the National Museum in Kraków. Fourier‐transform infrared spectroscopy imaging and mapping have been used for recording a visual image of the surface chemistry ...

Read More thumbnail image: Surface characterization of medieval silver coins minted by the early Piasts FTIR mapping and SEMEDX studies

Surface analytical approaches to reliably characterize lithium ion battery electrodes

Published: Oct 25, 2017

Author(s): R. Azmi, V. Trouillet, M. Strafela, S. Ulrich, H. Ehrenberg, M. Bruns

Journal: Surface and Interface Analysis

Active Li‐ion battery materials are typically characterized using X‐ray photoelectron spectroscopy when regarding chemical state elucidation. This work presents a multiplet‐splitting approach comprising in minimum 3 third‐row transition metals, namely, Mn, Co, and Ni, to improve the results in comparison to peak barycenter or single symmetric Voigt profile approaches. The achieved X‐ray photoelectron spectroscopy 2p templates in...

Read More thumbnail image: Surface analytical approaches to reliably characterize lithium ion battery electrodes

Electrochemical preparation of zinc oxide/polypyrrole nanocomposite coating for the highly effective solid‐phase microextraction of phthalate esters

Published: Oct 25, 2017

Author(s): Razieh Zakerian, Soleiman Bahar

Journal: Journal of Separation Science

Abstract In this work, zinc oxide/polypyrrole nanocomposite coating was fabricated on stainless steel and evaluated as a novel headspace solid‐phase microextraction fiber coating for extraction of ultra‐trace amounts of environmental pollutants, namely, phthalate esters, in water samples. The fiber nanocomposite were prepared by a two‐step process including the electrochemical deposition of polypyrrole on the surface of stainless...

Read More thumbnail image: Electrochemical preparation of zinc oxidepolypyrrole nanocomposite coating for the highly effective solidphase microextraction of phthalate esters

Mechanisms of Drug Resistance in Cancer: The Role of Extracellular Vesicles

Published: Oct 25, 2017

Author(s): Priya Samuel, Muller Fabbri, David Raul Francisco Carter

Journal: PROTEOMICS

Abstract Drug resistance remains a major barrier to the successful treatment of cancer. The mechanisms by which therapeutic resistance arises are multifactorial. Recent evidence has shown that extracellular vesicles (EVs) play a role in mediating drug resistance. EVs are small vesicles carrying a variety of macromolecular cargo released by cells into the extracellular space and can be taken up into recipient cells, resulting in...

Read More thumbnail image: Mechanisms of Drug Resistance in Cancer The Role of Extracellular Vesicles

The next generation of capillary electrophoresis instruments: Performance of CE‐SDS protein analysis

Published: Oct 25, 2017

Author(s): Julia Kahle, Kai Jorrit Maul, Hermann Wätzig

Journal: ELECTROPHORESIS

Abstract Over the last decade, capillary electrophoresis gained tremendous importance, because it became an indispensible tool for the quality control of biologics, e.g. therapeutic antibodies. Consequently, there has been a continuous development within the CE market. Microchip techniques have been established in the last years. Further trends are complete solutions for specific applications by the usage of reagent kits. Step by...

Read More thumbnail image: The next generation of capillary electrophoresis instruments Performance of CESDS protein analysis

Sample preconcentration from dilute solutions on micro/nanofluidic platforms: A review

Published: Oct 25, 2017

Author(s): Lung‐Ming Fu, Hui‐Hsiung Hou, Ping‐Hsien Chiu, Ruey‐Jen Yang

Journal: ELECTROPHORESIS

Abstract Biochemical detection plays a critical role in many analytical fields. For example, blood samples include many proteins with relevance to disease diagnosis and therapeutic monitoring. Foods and beverages contain a large number of chemicals and compounds which must be quantified and characterized to ensure their compliance with safety standards. Detecting trace amounts of contaminants in ambient air or water samples is...

Read More thumbnail image: Sample preconcentration from dilute solutions on micronanofluidic platforms A review

Fundamentals of affinity cell separations

Published: Oct 25, 2017

Author(s): Ye Zhang, Veronica Lyons, Dimitri Pappas

Journal: ELECTROPHORESIS

Abstract Cell separations using affinity methods continue to be an enabling science for a wide variety of applications. In this review, we discuss the fundamental aspects of affinity separation, including the competing forces for cell capture and elution, cell‐surface interactions, and models for cell adhesion. Factors affecting separation performance such as bond affinity, contact area, and temperature are presented. We also...

Read More thumbnail image: Fundamentals of affinity cell separations

Rigid‐layer Raman‐active modes in N ‐layer transition metal dichalcogenides: interlayer force constants and hyperspectral Raman imaging

Published: Oct 23, 2017

Author(s): Guillaume Froehlicher, Etienne Lorchat, Olivia Zill, Michelangelo Romeo, Stéphane Berciaud

Journal: Journal of Raman Spectroscopy

We report a comparative study of rigid‐layer Raman‐active modes in N‐layer transition metal dichalcogenides. Trigonal prismatic (2Hc, such as MoSe2, MoTe2, WS2, and WSe2) and distorted octahedral (1T', such as ReS2 and ReSe2) phases are considered. The Raman‐active in‐plane interlayer shear modes and out‐of‐plane interlayer breathing modes appear as well‐defined features with wavenumbers in the range 0−40cm−1. These rigid‐layer modes are well described by an...

Read More thumbnail image: Rigidlayer Ramanactive modes in N layer transition metal dichalcogenides interlayer force constants and hyperspectral Raman imaging

Resolution of R‐(−) and S‐(+)‐ enantiomers of clenbuterol in pharmaceutical preparations and black‐market products using liquid chromatography–tandem mass spectrometry

Published: Oct 23, 2017

Author(s): Benjamín Velasco‐Bejarano, Jahir Bautista, Ma. Olivia Noguez, Evangelina Camacho, Martha E. Rodríguez, Leonardo Rodríguez

Journal: Drug Testing and Analysis

Several banned substances are illegally used by athletes in racemic mixtures for performance enhancement. These include clenbuterol, methyl hexaneamine, methamphetamines, and amphetamines. Clenbuterol is present in a large number of doping samples from Olympic and non‐Olympic athletes that have adverse analytical findings (AAFs). In some cases, the presence of these substances could be the result of consumption of meat contaminated with...

Read More thumbnail image: Resolution of R and S enantiomers of clenbuterol in pharmaceutical preparations and blackmarket products using liquid chromatographytandem mass spectrometry

Hybrid central composite design for simultaneous optimization of removal of methylene blue and alizarin red S from aqueous solutions using Vitis tree leaves

Published: Oct 23, 2017

Author(s): Maryam Bagtash, Javad Zolgharnein

Journal: Journal of Chemometrics

Abstract Vitis tree leaves powder was used for efficient removal of dyes (eg, alizarin red and methylene blue) from water samples in binary batch systems. The influence of various parameters such as initial pH, initial dye concentration, and sorbent mass on the biosorption process was investigated. Statistical experimental design was utilized to optimize this biosorption process. A regression model was derived using a response...

Read More thumbnail image: Hybrid central composite design for simultaneous optimization of removal of methylene blue and alizarin red S from aqueous solutions using Vitis tree leaves

How effective are reducing plasma afterglows at atmospheric pressure in removing sulphide layers: Application on tarnished silver, sterling silver and copper

Published: Oct 20, 2017

Author(s): Olivier Schalm, Patrick Storme, Arianna Gambirasi, Monica Favaro, Alessandro Patelli

Journal: Surface and Interface Analysis

A plasma afterglow from a gas mixture of 5 vol% H2 in He is able to remove tarnish layers on pure silver in a matter of seconds. This dry, localized, and noncontact cleaning technique is a promising method to clean historical objects where silver is combined with organic materials and where traditional cleaning techniques are not recommended. However, historical objects are often manufactured with silver alloys but somehow their...

Read More thumbnail image: How effective are reducing plasma afterglows at atmospheric pressure in removing sulphide layers Application on tarnished silver sterling silver and copper

Surface treatment of ultra‐high molecular weight polyethylene fibers using potassium permanganate and mechanical properties of its composites

Published: Oct 20, 2017

Author(s): Weiwei Li, Renliang Ma, Momo Huang, Li Meng, Qiwei Pan

Journal: Surface and Interface Analysis

Potassium permanganate was applied to improve the surface properties of the ultra‐high molecular weight polyethylene (UHMWPE) fibers. The results suggested that the surface oxygen atoms increased dramatically and the O/C ratio increased from 0.030 to 0.563 after treatment. The increased surface roughness and the O‐containing groups on the treated fiber surface decreased the contact angles with water and ethylene glycol. The crystallinity...

Read More thumbnail image: Surface treatment of ultrahigh molecular weight polyethylene fibers using potassium permanganate and mechanical properties of its composites

Analysis of polymer parts: buried problems

Published: Oct 19, 2017

Author(s): Mary Jane Walzak, Heather Bloomfield

Journal: Surface and Interface Analysis

The analysis of manufactured parts for the source of defects is challenging as these defects are often buried below the surface. An example of this type of problem is a defect that occurs in a molded and multilayered painted part. The automotive industry continues to increase the amount of plastics used in their vehicles in order to reduce weight and increase fuel efficiencies. The polymers are usually specified based...

Read More thumbnail image: Analysis of polymer parts buried problems

Effects of lithium insertion and deinsertion into V2O5 thin films: Optical, structural, and absorption properties

Published: Oct 19, 2017

Author(s): R. Jourdani, L. Jadoual, M. Ait El Fqih, A. El Boujlaidi, H. Aouchiche, A. Kaddouri

Journal: Surface and Interface Analysis

The lithiated/delithiated vanadium pentoxide films deposited by sol‐gel spin coating on indium tin oxide–coated glass substrates were analyzed by sputter‐induced photon spectroscopy, X‐ray diffraction, and optical absorption techniques. First, it is shown that the crystalline structure of V2O5 after intercalation remains practically unchanged. Particularly, in the optical spectra during 5 keV Kr+ ion bombardment of clean, intercalated, and...

Read More thumbnail image: Effects of lithium insertion and deinsertion into V2O5 thin films Optical structural and absorption properties

Exploring the mechanism of Jieduquyuziyin prescription on systemic lupus erythematosus by GC–MS‐based urine metabolomics

Published: Oct 19, 2017

Author(s): Jing Wei, Jun Gao, Xinghong Ding

Journal: Biomedical Chromatography

Abstract A urine metabolomics method based on gas chromatography–mass spectrometry was developed in order to investigate the metabolite characteristics of systemic lupus erythematosus (SLE) and the therapeutic effects of Jieduquyuziyin prescription. The urinary metabolic profiles in urine specimens of the SLE model mice (MRL/lpr) group, prednisone acetate‐treated SLE mouse group, Jieduquyuziyin prescription‐treated SLE mouse group,...

Read More thumbnail image: Exploring the mechanism of Jieduquyuziyin prescription on systemic lupus erythematosus by GCMSbased urine metabolomics

Density‐weighted concentric rings k ‐space trajectory for 1 H magnetic resonance spectroscopic imaging at 7 T

Published: Oct 18, 2017

Author(s): Mark Chiew, Wenwen Jiang, Brian Burns, Peder Larson, Adam Steel, Peter Jezzard, M. Albert Thomas, Uzay E. Emir

Journal: NMR in Biomedicine

It has been shown that density‐weighted (DW) k‐space sampling with spiral and conventional phase encoding trajectories reduces spatial side lobes in magnetic resonance spectroscopic imaging (MRSI). In this study, we propose a new concentric ring trajectory (CRT) for DW‐MRSI that samples k‐space with a density that is proportional to a spatial, isotropic Hanning window. The properties of two different DW‐CRTs were compared against a radially...

Read More thumbnail image: Densityweighted concentric rings k space trajectory for 1 H magnetic resonance spectroscopic imaging at 7T

Simultaneous LC–MS/MS analysis of eicosanoids and related metabolites in human serum, sputum and BALF

Published: Oct 17, 2017

Author(s): Rhishikesh Thakare, Yashpal S. Chhonker, Nagsen Gautam, Amy Nelson, Richard Casaburi, Gerard Criner, Mark T. Dransfield, Barry Make, Kendra K. Schmid, Stephen I. Rennard, Yazen Alnouti

Journal: Biomedical Chromatography

Abstract The differences among individual eicosanoids in eliciting different physiological and pathological responses are largely unknown because of the lack of valid and simple analytical methods for the quantification of individual eicosanoids and their metabolites in serum, sputum and bronchial alveolar lavage fluid (BALF). Therefore, a simple and sensitive LC–MS/MS method for the simultaneous quantification of 34 eicosanoids in...

Read More thumbnail image: Simultaneous LCMSMS analysis of eicosanoids and related metabolites in human serum sputum and BALF
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