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Determination of C2-C12 Aldehydes in Water by SPME Arrow On-Fiber Derivatization and GC/MS
Peter Egli, Beat Schilling, Guenter Boehm, Kai Schueler

A method applying SPME Arrow extraction and on-fiber derivatization for the quantitation of C2-C12 aldehydes in water by GC/MS is described.

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Assessing Diversity in Cassava through the Application of Metabolomics
Margit Drapala, Elisabete Carvalhoa, Laura Perez-Fonsa, Elliott Pricea, L. Augusto Becerra Lopez-Lavalleb, Paul D. Frasera

In the present study metabolomic platforms have been established for Cassava and used to assess the biodiversity present in Cassava germplasm collections and elucidate underlying biochemical mechanisms associated with traits of interest.

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A KNIME Pipeline for the Analysis of GC-MS Data in Metabolomics
Sonia Liggi1, Maria Laura Santoru1, Cristina Piras1, Antonio Murgia2, Pierluigi Caboni2, Luigi Atzori1

A KNIME pipeline was developed to perform pre-processing of GC-MS data in an automated way and applied to a Inflammatory bowel diseases case study

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PredRet: Prediction of Retention Time by Direct Mapping between Multiple Chromatographic Systems
Jan Stanstrup, Steffen Neumann, Urška Vrhovšek

Retention time (RT) information is under-utilized in LC-MS based metabolomics and sharing of RTs between systems is not currently possible. PredRet is a new system that allows highly accurate mapping and prediction of RTs between LC systems.

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Profiling of metabolomic changes induced by testosterone esters in pig plasma and urine
Kamil Stastny, Martin Faldyna, Milan Franek

In this study, metabolic fingerprinting to discriminate between pigs treated with 17ß-testosteron esters and control animals has been investigated. Multivariate statistical analysis showed significant metabolic differences between test and control groups on day 28 after aplication of the testosterone hormonal preparation.

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A Simple Plate Based Assay Using pH Sensor Dye to Screen for Internalizing Antibody
Nidhi Nath, Becky Godat, Cesear Corona, Chad Zimprich, Mark McDougall, Poncho Meisenheimer, Marjeta Urh

Receptor mediated internalization is a key mechanism of action (MOA) for antibody drug conjugates (ADCs). However, current methods of studying antibody internalization have several limitations including: 1) A multistep process not suitable for screening; 2) Low signal-to-background ratios; 3) Not suitable for kinetic measurements. We have developed a method that mitigates problems associated with traditional internalization assays.

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An IgG Cleaving Protease from S equi with Improved Activity Against Mouse IgGs
Chris Hosfield, Philip Compton, Luca Fornelli, Paul Thomas, Neil L. Kelleher, Michael Rosenblatt & Marjeta Urh

Here we have expressed and purified a modified recombinant IdeZ, and show that it has significantly improved activity against mouse IgG2a and IgG3 subclasses when compared to IdeS. We also demonstrate the use of IdeZ in LC-MS workflows for human and mouse IgG characterization.

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Minimizing Carry-over for High Throughput Analysis
Christian Berchtold1, Reto Bolliger2, Guenter Boehm2, Götz Schlotterbeck1

Minimal carry-over is a prerequisite for high throughput analysis. However, minimized carry-over and cycle time are competing and a careful optimization is mandatory. In this study the influence of wash conditions on carry-over of various compounds was investigated. A strategy to minimize carry-over was developed. The influences of different wash tasks were investigated. Finally the contribution of different system components such as injector valve or column was studied.

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A Comparison of ITEX Dynamic Headspace–GC/MS to other Enrichment Techniques for Analysis of Flavoring Compounds
Douglas Doster1; Roger Pearson1; Sean Eppel1; Ken Rice1; Tom Flug2; Brian Peat2; Guenter Boehm2

Enrichment techniques are commonly used for the analysis of flavoring compounds in different matrices with GC/MS. Analysis of flavoring compounds is done by purge & trap, SPME or headspace, depending on requirements for sensitivity. The In-Tube Ex¬traction (ITEX) Dynamic Headspace uses a micro trap filled with an adsorbent material to efficiently extract the compounds. Here we evaluate if the ITEX can be used to effectively analyze for these compounds and reduce the analyst’s time involved.

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Automated in-gel digestion on a commercial autosampler directly coupled to nanoLC-MS/MS
Achermann François, Bolliger Reto, Buchs Natasha, Doiron Nicholas, Lagache Braga Sophie, Heller Manfred, Boehm Guenter

SDS-PAGE separates protein samples from LC-MS incompatible contaminations, and is frequently used to fractionate proteins of entire proteomes. One disadvantage is that gel lanes have to be cut into many slices, followed by in-gel digestion of proteins and extraction of peptides. The number of these gel slices goes into the hundreds, rendering this process very repetitive and prone to mistakes and errors during sample handling. Automation reduces such risks and improves reproducibility.

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Scientific News
Apricot Kernels Pose Risk of Cyanide Poisoning
Eating more than three small raw apricot kernels, or less than half of one large kernel, in a serving can exceed safe levels. Toddlers consuming even one small apricot kernel risk being over the safe level.
Soy Shows Promise as Natural Anti-Microbial Agent
Researchers from University of Guelph show that soy isoflavones and peptides could be used to reduce microbial contamination of food.
First DNA Vaccine in the EU Recommended for Use in Salmon
Clynav to protect Atlantic salmon from serious infectious disease.
Grant to Fund Million Peaks Project
The European Research Council (ERC) has awarded a prestigious Advanced Grant to Prof. Peter Schoenmakers, Prof. Albert Polman and Prof. Huib Bakker, all three of whom work at the University of Amsterdam (UvA).
Finding Inorganic Arsenic in Foodstuffs
A new European standard method to determine the content of inorganic arsenic in foodstuffs has been developed at the National Food Institute, Technical University of Denmark.
Effective Identification of Low-Gliadin Wheat Lines
Researchers have demonstrated the use of NIRS to identify low-gliadin wheat lines.
Virus Causing Tilapia Die-Offs Identified
Discovery of the virus causing Tilapia die-offs in Israel and Ecuador points the way to protecting a fish that feeds multitudes.
Interactive Maps Reveal Global Obesity
World’s obese population hits 640 million, according to largest ever study.
Eating Green Could be in Your Genes
Genetic variation uncovered that has evolved in populations that have historically favored vegetarian diets, such as in India, Africa and parts of East Asia.
Detecting Bacterial Growth in Packaged Food
New technique enables fast, accurate and noninvasive measurement of bacteria levels.
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