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Meet the Associate Editors: Shawna Hengel

Published: Dec 25, 2018

Author(s):

Journal: Rapid Communications in Mass Spectrometry

Read More thumbnail image: Meet the Associate Editors Shawna Hengel

Meet the Associate Editors: Adam Trevitt

Published: Dec 25, 2018

Author(s): Adam Trevitt

Journal: Rapid Communications in Mass Spectrometry

Read More thumbnail image: Meet the Associate Editors Adam Trevitt

Meet the Associate Editors: Tara Pukala

Published: Dec 25, 2018

Author(s): Tara Pukala

Journal: Rapid Communications in Mass Spectrometry

Read More thumbnail image: Meet the Associate Editors Tara Pukala

Meet the Associate Editors: Zhongping Yao

Published: Dec 25, 2018

Author(s): Zhongping Yao

Journal: Rapid Communications in Mass Spectrometry

Read More thumbnail image: Meet the Associate Editors Zhongping Yao

Meet the Associate Editors: Anneli Kruve

Published: Dec 25, 2018

Author(s): Anneli Kruve

Journal: Rapid Communications in Mass Spectrometry

Read More thumbnail image: Meet the Associate Editors Anneli Kruve

Meet the Associate Editors: Scott Grayson

Published: Dec 25, 2018

Author(s):

Journal: Rapid Communications in Mass Spectrometry

Read More thumbnail image: Meet the Associate Editors Scott Grayson

Corrosion resistance in chloride solution of the AlSi10Mg alloy obtained by means of LPBF

Published: Dec 21, 2018

Author(s): Marina Cabrini, Sergio Lorenzi, Tommaso Pastore, Cristian Testa, Diego Manfredi, Giulio Cattano, Flaviana Calignano

Journal: Surface and Interface Analysis

The paper deals with the corrosion resistance in chloride solutions of an AlSi10Mg alloy obtained by laser powder bed fusion (LPBF) process. The potentiodynamic tests were carried out in solutions having different chloride contents. The results emphasize the role of chloride concentration on localized corrosion. The increase of concentration reduces pitting potential. In addition, the influence of the post‐processing heat treatment temperature was recognized. Penetrating attacks occurred...

Read More thumbnail image: Corrosion resistance in chloride solution of the AlSi10Mg alloy obtained by means of LPBF

Iron‐related toxicity effects of single‐walled carbon nanotubes in human placental cells (BeWo) investigated by X‐ray fluorescence microscopy

Published: Dec 18, 2018

Author(s): Alessandra Gianoncelli, Francesca Cammisuli, Matteo Altissimo, Murielle Salomé, Oriano Radillo, Giuseppe Ricci, Silvia Giordani, Clara Rizzardi, Lorella Pascolo

Journal: X-Ray Spectrometry

As the prospect of human beings exposed to new nanomaterials increases, there are growing concerns about the foetal exposure and effects of such nanomaterials during pregnancy. Among others, due to their ample usage, it becomes urgent to address the vulnerability of the human placental barrier to carbon nanotubes (CNTs). Recently, by applying a combination of advanced synchrotron‐based X‐ray microscopy and X‐ray fluorescence (XRF) techniques, we demonstrated that raw single‐walled CNTs...

Read More thumbnail image: Ironrelated toxicity effects of singlewalled carbon nanotubes in human placental cells BeWo investigated by Xray fluorescence microscopy

Internal standard arithmetic implemented as relative concentration/relative calibration

Published: Dec 18, 2018

Author(s): Yuri Kalambet, Yuri Kozmin

Journal: Journal of Chemometrics

Abstract The problems related to the internal standard method in chromatography implemented using the Response ratio/Concentrations ratio graph are discussed. The examples provided demonstrate that this method compensates for detector sensitivity variations but may not compensate for the variations in mass of the injected sample if some of calibrations are not linear through origin (directly proportional). Implementation of an alternative internal standard arithmetic––relative...

Read More thumbnail image: Internal standard arithmetic implemented as relative concentrationrelative calibration

Microstructural and in‐depth electrochemical characterization of Zn diffusion layers on aluminum 3xxx alloy

Published: Dec 16, 2018

Author(s): Alex Lanzutti, Francesco Andreatta, Michele Magnan, Lorenzo Fedrizzi

Journal: Surface and Interface Analysis

AA 3XXX alloys are widely used in heating, ventilation, and air conditioning (HVAC) field. Diffusion joining using a filler metal together with flux is employed in some applications as for heat exchangers. In this work, the effect of diffusion of a Zn‐based flux on both microstructure and electrochemical behavior has been investigated. In particular, an AA3xxx was coated with a Zn‐rich flux and subjected to controlled atmosphere brazing (CAB). Glow discharge optical emission spectroscopy...

Read More thumbnail image: Microstructural and indepth electrochemical characterization of Zn diffusion layers on aluminum 3xxx alloy

Study of two large‐dimension Murillo's paintings by means of macro X‐ray fluorescence imaging, point X‐ray fluorescence analysis, and stratigraphic studies

Published: Dec 10, 2018

Author(s): Anabelle Križnar, Francisco J. Ager, Claudia Caliri, Francesco Paolo Romano, Miguel Ángel Respaldiza, María Auxiliadora Gómez‐Morón, Lourdes Núñez, Rocío Magdaleno

Journal: X-Ray Spectrometry

During the recent restoration of two large‐dimension paintings by Murillo, entitled “Miracle of the loaves and fishes” and “Moses and the water from the rock of Horeb,” several studies about the materials employed for their execution were carried out. Macro X‐ray fluorescence scanning technique was performed on both works complemented by point X‐ray fluorescence and stratigraphic analyses, in order to characterize the different components of the paintings (i.e., ground layer, pigments, and...

Read More thumbnail image: Study of two largedimension Murillos paintings by means of macro Xray fluorescence imaging point Xray fluorescence analysis and stratigraphic studies

Advances in the measurements of the mass attenuation coefficients

Published: Dec 6, 2018

Author(s): Yves Ménesguen, Christophe Dulieu, Marie‐Christine Lépy

Journal: X-Ray Spectrometry

The knowledge of atomic fundamental parameters, such as mass attenuation coefficients or fluorescence yields with low uncertainties, is of decisive importance in elemental quantification involving X‐ray fluorescence analysis techniques. Several databases providing the mass attenuation coefficients are accessible and frequently used within a large community of users. These compilations are most often in good agreement for photon energies in the hard X‐ray ranges. However, they significantly...

Read More thumbnail image: Advances in the measurements of the mass attenuation coefficients

Probing carbohydrate metabolism using hyperpolarized 13C‐labeled molecules

Published: Nov 26, 2018

Author(s): Jaspal Singh, Eul Hyun Suh, Gaurav Sharma, Chalermchai Khemtong, A. Dean Sherry, Zoltan Kovacs

Journal: NMR in Biomedicine

Glycolysis is a fundamental metabolic process in all organisms. Anomalies in glucose metabolism are linked to various pathological conditions. In particular, elevated aerobic glycolysis is a characteristic feature of rapidly growing cells. Glycolysis and the closely related pentose phosphate pathway can be monitored in real time by hyperpolarized 13C‐labeled metabolic substrates such as 13C‐enriched, deuterated D‐glucose derivatives, [2‐13C]‐D‐fructose, [2‐13C] dihydroxyacetone,...

Read More thumbnail image: Probing carbohydrate metabolism using hyperpolarized 13Clabeled molecules

Glycoproteomic markers of hepatocellular carcinoma‐mass spectrometry based approaches

Published: Nov 25, 2018

Author(s): Jianhui Zhu, Elisa Warner, Neehar D. Parikh, David M. Lubman

Journal: Mass Spectrometry Reviews

Hepatocellular carcinoma (HCC) is the third most‐common cause of cancer‐related death worldwide. Most cases of HCC develop in patients that already have liver cirrhosis and have been recommended for surveillance for an early onset of HCC. Cirrhosis is the final common pathway for several etiologies of liver disease, including hepatitis B and C, alcohol, and increasingly non‐alcoholic fatty liver disease. Only 20–30%...

Read More thumbnail image: Glycoproteomic markers of hepatocellular carcinomamass spectrometry based approaches

Application of in vivo MR methods in the study of breast cancer metabolism

Published: Nov 20, 2018

Author(s): Naranamangalam R. Jagannathan

Journal: NMR in Biomedicine

In the last two decades, various in vivo MR methodologies have been evaluated for their potential in the study of cancer metabolism. During malignant transformation, metabolic alterations occur, leading to morphological and functional changes. Among various MR methods, in vivo MRS has been extensively used in breast cancer to study the metabolism of cells, tissues or whole organs. It provides biochemical information at the metabolite level. Altered choline, phospholipid and energy metabolism...

Read More thumbnail image: Application of in vivo MR methods in the study of breast cancer metabolism

Rapid analysis of Na, Mg, Ca, Fe, and Zn in breakfast cereals (granola type) by energy dispersive‐X‐ray fluorescence

Published: Nov 18, 2018

Author(s): Loïc Perring, Aurélien Cotard, Sarah Al Sayadi, Stéphane Berrut

Journal: X-Ray Spectrometry

Energy dispersive‐X‐ray fluorescence (ED‐XRF) is a well spread near‐line analytical technique, suitable for easy and rapid measurement of major elements and/or trace elements especially in many different food matrices. This study demonstrates the fitness for purpose of this method to ensure the correct addition of minerals during breakfast cereal production. Indeed, variations in process and in raw material compositions may lead to values out of legal tolerance, and thus quality controls need...

Read More thumbnail image: Rapid analysis of Na Mg Ca Fe and Zn in breakfast cereals granola type by energy dispersiveXray fluorescence

Rembrandt's Old Woman Praying, 1629/30: A look below the surface using X‐ray fluorescence mapping

Published: Nov 11, 2018

Author(s): Katharina Uhlir, Michele Gironda, Luca Bombelli, Michael Eder, Nicola Aresi, Gabriele Groschner, Martina Griesser

Journal: X-Ray Spectrometry

Rembrandt's painting Old Woman Praying, 1629/30, is the most valuable and exceptional work of art of the Residenzgalerie Salzburg (RGS). It is painted on a gilded copper plate with dimensions of only approximately 15 × 12 cm. The painting probably belongs to a series of three small‐scale tronies, all executed on gilded copper plates. This particular picture preparation, which represents a special feature in Rembrandt's work, is quite unusual in the history of art. Previous investigations on...

Read More thumbnail image: Rembrandts Old Woman Praying 162930 A look below the surface using Xray fluorescence mapping

Integration of MRI and MRS approaches to monitor molecular imaging and metabolomic effects of trabectedin on a preclinical ovarian cancer model

Published: Oct 30, 2018

Author(s): Rossella Canese, Gianmauro Palombelli, Mattea Chirico, Paola Sestili, Marina Bagnoli, Silvana Canevari, Delia Mezzanzanica, Franca Podo, Egidio Iorio

Journal: NMR in Biomedicine

Although several drugs are available to treat recurrences of human epithelial ovarian cancer (EOC), clinical responses often remain short lived and lead to only marginal improvements in patients' survival. One of the new drugs proposed for recurrent platinum‐resistant EOC patients is trabectedin (Trab), a marine‐derived antitumor agent initially isolated from the tunicate Ecteinascidia turbinata and currently produced synthetically. Predictive biomarkers of therapy response to this drug and...

Read More thumbnail image: Integration of MRI and MRS approaches to monitor molecular imaging and metabolomic effects of trabectedin on a preclinical ovarian cancer model

The challenges of peptidomics in complementing proteomics in a clinical context

Published: Oct 29, 2018

Author(s): Evelyne Maes, Eline Oeyen, Kurt Boonen, Karin Schildermans, Inge Mertens, Patrick Pauwels, Dirk Valkenborg, Geert Baggerman

Journal: Mass Spectrometry Reviews

Naturally occurring peptides, including growth factors, hormones, and neurotransmitters, represent an important class of biomolecules and have crucial roles in human physiology. The study of these peptides in clinical samples is therefore as relevant as ever. Compared to more routine proteomics applications in clinical research, peptidomics research questions are more challenging and have special requirements with regard to sample handling, experimental design, and bioinformatics. In this...

Read More thumbnail image: The challenges of peptidomics in complementing proteomics in a clinical context

Localized and adaptive soft sensor based on an extreme learning machine with automated self‐correction strategies

Published: Oct 24, 2018

Author(s): Dominic V. Poerio, Steven D. Brown

Journal: Journal of Chemometrics

Abstract A novel, nonlinear soft sensor based on a localized, adaptive single‐layer feedforward neural network with random hidden layer weights, also called an extreme learning machine, combined with the recursive partial least squares algorithm to update the linear output layer weights, is explored. The soft sensor is highly adaptive with minimal operator input, and automated mechanisms are included to self‐correct numerous aspects...

Read More thumbnail image: Localized and adaptive soft sensor based on an extreme learning machine with automated selfcorrection strategies
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