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Tuesday, January 27, 2015
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A Triple Ionization Source for LC/MS
Kaveh Jorabchi, Karl Hanold and Jack Syage

This poster reports the development of a triple ionization source consisting of ESI, APCI and APPI sources. The source uses two probes, one for ESI and a nebulizer/vaporizer for APCI and APPI.

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Dual Dopant Approach for Simultaneous LC-APPI-MS/MS Analysis of Low and High Proton Affinity Pesticides
Sheng-Suan (Victor) Cai, Kaveh Jorabchi and Jack Syage

The objectives of the work detailed in this poster was to explore dual dopant approach to maximizing APPI sensitivity for simultaneous analysis of low and high proton affinity compounds.

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Reversed-Phase Point-of-use Purifier for the Removal of Trace Organics in High Purity Water
Coralie Monferran, Cecilia Devaux, Maricar Tarun, Estelle Riche and Daniel Darbouret

Recent developments of Liquid Chromatography instrumentation, such as UHPLC coupled with mass spectrometry, have increased the separation efficiency and sensitivity. Unfortunately, there are some unwelcome consequences. One of these is the detection of trace contamination in the solvents used to prepare mobile phases. The aim of this work was to design a cartridge which produces high water quality for very sensitive LC-MS applications.

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Fully Automated LC-MS/MS-based Determination of Bosentanand its Metabolites in Dried Blood Spots using the SCAP™ DBS System
Mirko Glinski, Norbert Ganz, Jasper Dingemanse, Laurent Nicolas and Werner Döbelin

Dried Blood Spot (DBS) analysis is a very promising alternative to conventional whole blood and plasma analysis used in drug discovery and development or later in therapeutic drug monitoring with well documented advantages.

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Hyphenated Techniques as Modern Detection Systems in Ion Chromatography
K.M. Ruth, A. Wille, S. Czyborra and J. Kleimann

Historically ion chromatography (IC) using conductivity detection has been successfully used for the analysis of ionic (e.g., anions and cations) and polar substances (e.g., organic acids or sugars). However, due to current toxicity concerns, analyses in complex matrices require improved sensitivities and selectivities.

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Sequence-Specific Ni(II)-Dependent Peptide Bond Hydrolysis for Protein Engineering. Combinatorial Library Determination of Optimal Sequences

The sequence-specific cleavage of the peptide bond is a crucial procedure in protein engineering and purification. The extreme stability of this bond, with half-life for spontaneous hydrolysis estimated as 350-600 years at neutral pH and room temperature, limits the range of appropriate cleavage reagents.

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An improved data processing pipe-line for comprehensive H-NMR and X/MS -omics data
R. J. O. Torgrip, K. M. Åberg, E. Alm

In the post acqusition analysis of comprehensive -omics data the pre-processing pipe-line is crucial to extract the maximum possible amount of information from the data. Here we show a processing pipe-line for (1D)H-NMR and (2D)X/MS data comprising; feature detection, inter-sample feature alignment and internal-standard free normalization that outperforms today’s state-of-the-art processing schemes.

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LC-MS Approaches to Profiling of Non-Radiolabelled Metabolites in Response to Recent Regulatory Changes
Richard Clayton, Caroline Anderson, Brian Morrison and Lindsay Corfield

Following publication of the FDA MIST guidelines and revision of ICH M3, there is increasing interest in obtaining metabolic profiling data at an early stage in the development of a drug. This has led to a requirement to estimate the relative abundance of metabolites in samples prior to the synthesis of the radiolabelled compound and from a wider range of studies.

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Basic amino acids profiling during hepatic tumorigenesis by hydrophilic interaction liquid chromatography tandem mass spectrometry (HILIC-MS/MS)
O. D’Apolito (1), D. Garofalo (1), D. Paris (2), D. Melck (2), R. Calemma (3), F. Izzo (3), G. Palmieri (2), A. Motta (2) and G. Corso (1)

This study is aimed to characterize basic aminoacids profiles from liver tissues of primary hepatocarcinoma (HCC) and metastases from colorectalcarcinomas (MET), and from adjacent cirrhotic related hepatitis-C-virus (CIRR) and non-cirrhotic normal liver (NT). Arginine levels in MET are significantly higher (P<0.05) compared to NT, CIRR and HCC. Although our preliminary data should be validated, profiling of basic aminoacids could allow a better classification of liver malignancies in humans.

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Showing Results 71 - 80 of 124
Scientific News
A Better Understanding of Earth’s Geological Evolution
New instruments to more precisely measure a uranium element carbon dating ratio of 238U/235U.
Insights Into A Rare Genetic Disease
Study shows mutation in NGLY1 gene is linked to a genetic disorder with severe consequences.
Researchers Study Cultural Heritage Painting Cross-Sections
Study of cultural heritage painting cross-sections using AFM-based nanoscale mass spectrometry technique.
Assessing Tumors During Surgery
A novel biomarker for mutant p53 could help pathologists assessing tumors during surgery.
Pharmaceuticals, Personal Care Products Could Taint Swimming Pools
A new study suggests pharmaceuticals and chemicals from personal care products end up in swimming pools, possibly interacting with chlorine to produce disinfection byproducts with unknown properties and health effects.
More Efficient, Sensitive Estrogen Detection Developed
A new method for detecting trace amounts of estrogen in small samples that holds the potential to improve research into cancer and other diseases has been developed.
Chestnuts Roasting On An Open Fire
ORNL work with scientists funded by The American Chestnut Foundation confirms increased blight-resistance of former forest giant.
Metabolomics Data Normalization with EigenMS
In this study, a singular value decomposition-based method, called EigenMS, for normalization of metabolomics data was tested.
Circadian Variation Of The Human Metabolome
Real-time breath analysis was used to study circadian metabolism.
Cells Build 'Cupboards' To Store Metals
Lawrence Livermore researchers have discovered that cells of the alga Chlamydomonas Reinhardti build a “pantry” to store metal and maintain equilibrium.
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