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An ocfentanil‐related death case: UHPLC–MS/MS analysis of the drug

Published: Sep 3, 2018

Author(s): Sara Casati, Mauro Minoli, Ilaria Angeli, Alessandro Ravelli, Graziano Domenico Luigi Crudele, Marica Orioli

Journal: Drug Testing and Analysis

Read More thumbnail image: An ocfentanilrelated death case UHPLCMSMS analysis of the drug

Global patterns of STR sequence variation: Sequencing the CEPH human genome diversity panel for 58 forensic STRs using the Illumina ForenSeq DNA Signature Prep Kit

Published: Sep 3, 2018

Author(s): Christopher Phillips, Laurence Devesse, David Ballard, Leanne Weert, Maria la Puente, Stefania Melis, Vanessa Álvarez Iglesias, Ana Freire‐Aradas, Nicola Oldroyd, Cydne Holt, Denise Syndercombe Court, Ángel Carracedo, Maria Victoria Lareu

Journal: ELECTROPHORESIS

Abstract The 944 individuals of the CEPH human genome diversity panel (HGDP–CEPH), a standard sample set of 51 globally distributed populations, were sequenced using the Illumina ForenSeq™ DNA Signature Prep Kit. The ForenSeq™ system is a single multiplex for the MiSeq/FGx™ massively parallel sequencing instrument, comprising: amelogenin, 27 autosomal STRs, 24 Y‐STRs, 7 X‐STRs, and 94 SNPforID+Kiddlab autosomal ID‐SNPs (plus...

Read More thumbnail image: Global patterns of STR sequence variation Sequencing the CEPH human genome diversity panel for 58 forensic STRs using the Illumina ForenSeq DNA Signature Prep Kit

Evidence of seasonal variation of ethyl glucuronide in hair: Modeling a seven‐year data series

Published: Sep 3, 2018

Author(s): Patryk Własiuk, Eugenio Alladio, Alberto Salomone, Marco Vincenti, Grzegorz Zadora

Journal: Drug Testing and Analysis

Abstract The assessment of chronic excessive alcohol consumption by ethyl glucuronide (EtG) determination in hair is generally based on a cut‐off value of 30 pg/mg recognized by regulatory authorities and scientific societies that guide the decision process. The ongoing debate about the risks connected with the straightforward application of this cut‐off refers to the factors that may influence the detected EtG concentration....

Read More thumbnail image: Evidence of seasonal variation of ethyl glucuronide in hair Modeling a sevenyear data series

Rapid and efficient western blot assay by rotational cyclic draining and replenishing procedure

Published: Sep 3, 2018

Author(s): Saba Sajjad, Mui Thi Do, Heung‐Seon Shin, Tae‐Sung Yoon, Sunghyun Kang

Journal: ELECTROPHORESIS

Abstract Western blot is a principal technique for the detection of specific proteins in various biology disciplines. The antibody incubation is an imperative step in western blot. Antibody incubation by mild shaking on a rocker is generally used to facilitate mixing of antibodies. However, mild shaking is an inefficient process to remove antibody depletion layer on blotting membrane and requires hours of incubation time to achieve...

Read More thumbnail image: Rapid and efficient western blot assay by rotational cyclic draining and replenishing procedure

Proteomic Profiling Analysis of Male Infertility in Spodoptera Litura Larvae Challenged with Azadirachtin and its Potential‐Regulated Pathways in the Following Stages

Published: Sep 3, 2018

Author(s): Ranran Sun, Gaofeng Cui, Yaoyao Chen, Benshui Shu, Guohua Zhong, Xin Yi

Journal: PROTEOMICS

Abstract Biopesticides are considered as an alternative to synthetic pesticide with a focus on increasing agricultural productivity as well as maintaining the ecosystem. Prior to application, its potential mechanism should be clearly addressed. Here, the effects of azadirachtin on the reproductive behavior in male Spodoptera litura (Fabricius) are determined. To further explore its molecular mechanism, an iTRAQ (isobaric tags for relative and...

Read More thumbnail image: Proteomic Profiling Analysis of Male Infertility in Spodoptera Litura Larvae Challenged with Azadirachtin and its PotentialRegulated Pathways in the Following Stages

Injection system for fast capillary electrophoresis based on pressure regulation with flow restrictors

Published: Sep 3, 2018

Author(s): Jasmine S. Furter, Peter C. Hauser

Journal: ELECTROPHORESIS

Abstract A fast automated system for rapid electrophoretic separations in short conventional capillaries employing contactless conductivity detection is presented. The instrument is based on pneumatic pressurization and does not require a conventional pump. The required pressures and flow rates for the different steps of the injection and flushing processes are produced with the help of two flow restrictors. The device is...

Read More thumbnail image: Injection system for fast capillary electrophoresis based on pressure regulation with flow restrictors

Optimization of a reduced volume PCR amplification for PowerPlex® Fusion kit using FTA™ cards and generation of population genetic data for Brunei population

Published: Sep 3, 2018

Author(s): Paul Vun Onn Liew, Laura Natalia Riccardi, Abimbola Olatunde Afolabi, William Goodwin, Sibte Hadi

Journal: ELECTROPHORESIS

Abstract The commercial PowerPlex® Fusion kit is an autosomal STR multiplex kit that has high discrimination power and is more informative in forensic, paternity, and relationship‐testing cases. Key features of this multiplex system are the possibility to direct amplify FTA™ card punches as well as non‐FTA cards and commonly used swabs; optimised inhibitor tolerance and high sensitivity generating full profiles from amount as little...

Read More thumbnail image: Optimization of a reduced volume PCR amplification for PowerPlex Fusion kit using FTA cards and generation of population genetic data for Brunei population

A highly sensitive aptasensor for on‐site detection of lipopolysaccharides in food

Published: Sep 3, 2018

Author(s): Cheng Cheng, Jayne Wu, Jiangang Chen

Journal: ELECTROPHORESIS

Abstract A rapid, low‐cost, highly sensitive, and specific capacitive aptasensor is presented for detection of lipopolysaccharides (LPS). Exposure to LPS could cause fever, gram‐negative sepsis, septic shock, and eventual death. Hence, rapid, low cost, and sensitive detection of LPS is pivotal for the safety of food, pharmaceutical, and medical devices and products. In this work, a capacitive sensing method based on alternating...

Read More thumbnail image: A highly sensitive aptasensor for onsite detection of lipopolysaccharides in food

The application of magnetic resonance fingerprinting to single voxel proton spectroscopy

Published: Sep 3, 2018

Author(s): Alexey Kulpanovich, Assaf Tal

Journal: NMR in Biomedicine

Magnetic resonance fingerprinting has been proposed as a method for undersampling k‐space while simultaneously yielding multiparametric tissue maps. In the context of single voxel spectroscopy, fingerprinting can provide a unified framework for parameter estimation. We demonstrate the utility of such a magnetic resonance spectroscopic fingerprinting (MRSF) framework for simultaneously quantifying metabolite concentrations, T1 and T2 relaxation times...

Read More thumbnail image: The application of magnetic resonance fingerprinting to single voxel proton spectroscopy

Ion formation in droplet‐assisted ionization

Published: Sep 3, 2018

Author(s): Michael J. Apsokardu, Devan E. Kerecman, Murray V. Johnston

Journal: Rapid Communications in Mass Spectrometry

Rationale In droplet‐assisted ionization (DAI), intact molecular ions are generated from molecules in aerosol droplets by passing the droplets through a temperature‐controlled capillary inlet. Ion formation is explored through the effects of analyte mass flow, droplet solvent composition, and capillary temperature on ion signal intensity. Methods A Waters...

Read More thumbnail image: Ion formation in dropletassisted ionization

Surface enhancement Raman spectroscopy and density functional theory study of silver nanoparticles synthetized with d ‐glucose

Published: Sep 3, 2018

Author(s): Alejandro González Fá, Ignacio López‐Corral, Ricardo Faccio, Alfredo Juan, María Susana Di Nezio

Journal: Journal of Raman Spectroscopy

Abstract The role of α‐ and β‐d‐glucose, and d‐gluconate anion, acting as capping agent, on silver nanoparticles (AgNPs) was evaluated using both Raman and density functional theory studies. The particles were synthetized employing glucose, as reducing and blocking agent, in alkaline conditions. Capping agents were characterized through surface enhancement Raman spectroscopy together with modeling performed using silver clusters....

Read More thumbnail image: Surface enhancement Raman spectroscopy and density functional theory study of silver nanoparticles synthetized with d glucose

Secondary ion mass spectrometry depth profiling of ultrathick films using an argon gas cluster source: Crater shape implications on the analysis area as a function of depth

Published: Sep 3, 2018

Author(s): Shin Muramoto, Cayla Collett

Journal: Surface and Interface Analysis

Argon cluster ions have enabled molecular depth profiling to unprecedented depths, with minimal loss of chemical information or changes in sputter rate. However, depth profiling of ultrathick films (>100 μm) using a commercial ion source oriented at 45° to the surface causes the crater bottom to shrink in size because of a combination of the crater wall angle, sputter rate differences along the trailing‐edge crater wall, and...

Read More thumbnail image: Secondary ion mass spectrometry depth profiling of ultrathick films using an argon gas cluster source Crater shape implications on the analysis area as a function of depth

High‐temperature 2D Fermi surface of SrTiO 3 studied by energy‐filtered PEEM

Published: Sep 3, 2018

Author(s): Claire Mathieu, Sara Gonzalez, Christophe Lubin, Olivier Copie, Vitaliy Feyer, Claus M. Schneider, Nick Barrett

Journal: Surface and Interface Analysis

Functional oxides displaying phenomena such as 2D electron gas (2DEG) at oxide interfaces represent potential technological breakthroughs for post‐CMOS (Complementary Metal Oxide Semiconductor) electronics. Noninvasive techniques are required to study the surface chemistry and electronic structure underlying their often unique electrical properties. The sensitivity of photoemission electron microscopy (PEEM) to local potential, chemistry,...

Read More thumbnail image: Hightemperature 2D Fermi surface of SrTiO 3 studied by energyfiltered PEEM

Observation of spider silk by femtosecond pulse laser second harmonic generation microscopy

Published: Sep 3, 2018

Author(s): Yue Zhao, Yanrong Li, Khuat Thi Thu Hien, Goro Mizutani, Harvey N. Rutt

Journal: Surface and Interface Analysis

An asymmetric β‐sheet structure of spider silk is said to induce optical second harmonic generation. In this paper, using an in‐house nonscanning type femtosecond pulse laser second harmonic generation microscope, we characterized the behavior of the β‐sheet of spider silk under an applied external force. The orientation of the β‐sheets was more unidirectional when the silk was extended. One of the origins of the high mechanical strength...

Read More thumbnail image: Observation of spider silk by femtosecond pulse laser second harmonic generation microscopy

Easy functionalization process applied to develop super‐hydrophobic and oleophobic properties on ASTM 1200 aluminum surface

Published: Sep 3, 2018

Author(s): Andreia Rocha Canella Carneiro, Fábio Augusto Souza Ferreira, Manuel Houmard

Journal: Surface and Interface Analysis

Super‐hydrophobic and oleophobic surfaces on ASTM 1200 H14 aluminum alloy substrates were achieved by chemical etching followed by deposition of organically modified silicate (ORMOSIL) coatings synthesized through sol‐gel method. The chemical etching using FHH solutions (FeCl3 + HCl + H2O2) was adapted for the studied aluminum alloy by varying the concentration of iron (III) chloride and the etching time in order to...

Read More thumbnail image: Easy functionalization process applied to develop superhydrophobic and oleophobic properties on ASTM 1200 aluminum surface

Application of atom probe tomography to fundamental issues of steel materials

Published: Sep 3, 2018

Author(s): Jun Takahashi, Kazuto Kawakami, Yukiko Kobayashi

Journal: Surface and Interface Analysis

Although steel research has a very long history, there are still various questions and uncertainties on the fundamental issues of steel materials. Our aim is to clarify the issues by atomic‐scale characterization using atom probe tomography (APT). This paper introduced our developed techniques in application of APT into steel materials. The first one is the specimen tip preparation technique from the site‐specific regions of interest in...

Read More thumbnail image: Application of atom probe tomography to fundamental issues of steel materials

Peptide‐modified stainless steel with resistance capacity of Staphylococcus aureus biofilm formation

Published: Sep 3, 2018

Author(s): Pan Cao, Xiaoyan He, Jinfei Xiao, Chengqing Yuan, Xiuqin Bai

Journal: Surface and Interface Analysis

Attachment of marine fouling organisms causes biofouling. The adhesion of destructive organisms can be reduced through surface modification with antibiofilm chemicals. In this study, a direct surface modification between peptide solution with different concentrations and stainless steel was performed, and the reaction mechanism was explained by simulation of the modification process. Results of surface water contact angle and surface...

Read More thumbnail image: Peptidemodified stainless steel with resistance capacity of Staphylococcus aureus biofilm formation

Quantitative XAFS/EELS analyses of nitrogen species in titanium oxide photocatalysts

Published: Sep 3, 2018

Author(s): Tomoko Yoshida, Muenaki Yamamoto, Masato Akatsuka, Akiyo Ozawa, Yuma Kato, Shinya Yagi, Tetsuo Tanabe

Journal: Surface and Interface Analysis

With a view to rational designing of a highly functional visible‐light TiO2 photocatalyst, nitrogen atoms were doped into TiO2 samples by an ion implantation technique which enables to control the depth and concentration of dopants. Although the absorbance in the visible‐light region of the sample increased by the nitrogen doping, photocatalytic activity of the sample was not directly connected with the photo‐absorbance. The N K‐edge X‐ray...

Read More thumbnail image: Quantitative XAFSEELS analyses of nitrogen species in titanium oxide photocatalysts

Measurements of elastic scattering cross sections for 25.2, 28.5, 37.4, 36.8, and 42.2 keV X‐ray photons in elements with 22 ≤  Z  ≤ 83

Published: Sep 2, 2018

Author(s): Arun Upmanyu, Gurjot Singh, Harpreet Singh Kainth, Devinder Mehta, Jangvir Singh Shahi, Sanjeev Kumar

Journal: X-Ray Spectrometry

The differential elastic scattering cross sections were measured for 25.2 (Sn‐Kα), 28.5 (Sn‐Kβ1,3), 37.4 (Nd‐Kα1), 36.8 (Nd‐Kα2), and 42.2 (Nd‐Kα1,3) keV X‐ray photons at 139° scattering angle in elements with 22 ≤ Z ≤ 83. The measurement was done in reflection mode experimental setup involving 50Sn/60Nd secondary targets excited with 241Am radioisotope. The scattered X‐ray photons were detected using a high‐resolution low energy germanium...

Read More thumbnail image: Measurements of elastic scattering cross sections for 25_2 28_5 37_4 36_8 and 42_2keV Xray photons in elements with 22 Z 83

Segregation of dioctyl phthalate to the surface of polystyrene films characterized by ToF‐SIMS and XPS

Published: Sep 2, 2018

Author(s): Wenjing Xie, Lu‐Tao Weng, King Lun Yeung, Chi‐Ming Chan

Journal: Surface and Interface Analysis

Polystyrene (PS)‐dioctyl phthalate (DOP) films were prepared by spin coating solutions of a mixture of PS and DOP on Si wafers and characterized by time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) and X‐ray photoelectron spectroscopy (XPS). ToF‐SIMS depth profile results showed that DOP mainly segregated to the top 10 nm of the surface of the PS‐DOP film as well as to the interface between the film and the substrate. The...

Read More thumbnail image: Segregation of dioctyl phthalate to the surface of polystyrene films characterized by ToFSIMS and XPS
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