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Wednesday, September 17, 2014
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Uranium Oxide Particulate Surrounding a Former Processing Facility
Nicholas S. Lloyd, Randall R. Parrish, Tim S. Brewer, Simon R. Chenery, Sarah V. Hainsworth

This research project aims to improve understanding of the behaviour of DU particulate in the environment, using a case study of a site that is heavily contaminated by past emissions. The research will help predict the long-term fate of pollution from uranium oxide particulate.

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A Sensitive Fluorimetric Assay for Detection of ß-Secretase Activity Using a Novel FRET Peptide Substrate
Xudong Zhu, Xing Han, Manpreet Mann, Rich Meyer, Xiaohe Tong, Anita Hong and Vera Rakhmanova

In order to facilitate high throughput screening of AD drug candidates, we have developed a new SensoLyte™ 520 b-secretase assay kit using a fluorescence resonance energy transfer (FRET) peptide, HiLyte Fluor™ 488-Glu-Val-Asn-Leu-Asp-Ala-Glu-Phe-Lys(QXL™ 520)-OH. The longer excitation and emission wavelengths of HiLyte Fluor™488 minimize the interference from autofluorescence and absorbance of test compounds.

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Glycoprotein Labeling and Detection: Novel Click Chemistry-based Applications for gel Electrophoresis, Flow Cytometry and Fluorescence Microscopy
Brian Agnew, Nancy Ahnert, Suzanne Buck, Scott Clarke, Courtenay Hart, Kapil Kumar, and Tamara Nyberg

We demonstrate highly-selective and sensitive labeling methods for the detection of specific glycoprotein subclasses, including cell surface N- and O-linked glycoproteins and intracellular O-GlcNAc modified proteins, utilizing the copper-catalyzed cycloaddition reaction between azides and alkynes, or click chemistry.

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PRIMe: Platform for RIKEN Metabolomics
Atsushi Fukushima, Miyako Kusano, Kenji Akiyama, Takeshi Obayashi, Takayuki Tohge, Masami Yokota Hirai, Shigehiko Kanaya, Masanori Arita, Yoko Shinbo, Kazuo Shinozaki, Tetsuya Sakurai and Kazuki Saito

We have developed a web-based database, "PRIMe (Platform for RIKEN Metabolomics)," which contains powerful tools for researchers to analyze gene co-expression data and mass spectral data. PRIMe has been developed with the main aim of facilitating integrated analysis for transcriptomics and metabolomics.

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Proteomic Profiling in Defining Chemoresistant Breast Cancer
Chuthapisith S, Layfield R, Kerr I, Hughes C and Eremin O

This study aims to identify protein profiles in breast cancer cells as predictors of chemoresistance by using two-dimensional gel electrophoresis and MALDI-TOF peptide mass fingerprinting. Our findings provide further insights into the complex mechanisms of chemoresistance, as well as representing an attractive starting point for the identification of potential protein biomarkers to predict response to chemotherapy in breast cancer in vivo.

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Kinetic Constants and Sample-to-Sample Variation in the Rate of Metabolism of two or more Substrates for Human Liver Microsomal CYP1A2, CYP2B6, CYP2C8, CYP2D6 and CYP3A4/5
Zell Woodworth, L. Anne Dwyer, Lisa Collins, Terry Graves, Stephanie Helmstetter, Brian Ogilvie, Clayton Otwell, Chad Pope, Tiffin Ramsey, Phyllis Yerino and Andrew Parkinson

Marker substrates for certain CYPs have changed for several reasons, including the need for improved selectivity and sensitivity, reliable substrates for LC/MS/MS analysis, and substrates that provide greater repeatability. The objectives of this study were to compare sample-to-sample variation in cytochrome P450 enzymatic rates between two or more CYP-specific substrates and to determine Michaelis-Menten kinetic constants for these same reactions using a pool of human liver microsomes.

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Evaluation of Different Interpretation Strategies to Discover PTM in MS/MS Peptide Fragmentation Data
Daniel Chamrad, Gerhard Korting, Ken Fantom, Andy West, Klaus Schneider, Ulrike Schweiger-Hufagel, Herbert Thiele and Martin Bluggel

The phenomenon of acquired high quality MS/MS spectra that can not be explained within typical sequence database searches is well known. Although protein identification was successful it is manually very laborious and in most cases even impossible to match these spectra with any suggested protein sequence. The procedure of second pass searches has been developed to overcome this problem. Here we report from our in house developed tool PTM-Explorer.

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Towards Understanding of Ryegrass-Endophyte Symbiosis through Data Integration of Transcriptome and Metabolome
Mingshu Cao, Linda Johnson, Albert Koulman, Geoff Lane and Susanne Rasmussen

Combined with extensive bioinformatics analyses, our joint analysis of transcriptomics and metabolomics data has generated interesting findings which led to further laboratory verification, such as potential genes associated with alkaloid production.

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Herbal Metabolic Profiling of Raw and Steamed Panax notoginseng
Eric C.Y. Chan, Swee-Lee Yap, Aik-Jiang Lau, Pay-Chin Leow, Ding-Fung Toh, and Hwee-Ling Koh

At present, metabolite profiling is of growing importance in herbal medicine fields such as breeding, formulation, quality control and clinical trials. Herbal metabolic profiling allows direct detection of down-stream derivatives of metabolites, arising from herbal formulation process, using metabolite profiling ultra performance liquid chromatography time-of-flight mass spectrometry.

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Showing Results 81 - 90 of 100
Scientific News
Mass Spectrometry in Your Hand
Electrospray arrays can dramatically downsize systems and costs for onsite chemical analysis and many other applications.
Study Aims to Develop Breath Test for COPD
A new clinical iniative, lead by NYU Langone Medical Center, aims to determine a breath test’s effectiveness to identify volatile organic compounds (VOCs) in human breath that are biomarkers of chronic obstructive pulmonary disease (COPD).
Comparison of Caffeinated and Decaffeinated Coffee - Implications for Alzheimer's Disease
Researchers from the National University of Singapore successfully demonstrated the viability of GC-TOF-MS as an analytical platform for metabolomics analysis of coffee samples.
Repressing the Repressors May Drive Tissue-Specific Cancers
Stowers scientists establish Drosophila and mammalian models to study mutations found in pediatric brain tumors.
Embalming Study ‘Rewrites’ Key Chapter in Egyptian History
New evidence to suggest that the origins of mummification started in ancient Egypt 1,500 years earlier than previously thought.
Identification of Psoriatic Arthritis Mediators in Synovial Fluid
This study represents the most comprehensive proteomic analysis of psoriatic arthritis synovial fluid, to date.
Mass Spec-Based Metabolomics Workflows to Evaluate Plant Immunity
This article reviews metabolomics studies used to evaluate plant immunity with an emphasis on mass spectrometry in its many forms.
Using LC-MS to Analyse Sulfonamides in Food Grade Honey
Sulfonamides are one of a number of groups of chemicals whose presence in honey is limited by international regulations.
Reimagining UHPLC
To learn more about the new Vanquish UHPLC system from Thermo Fisher Scientific we spoke to Wulff Niedner, Director of HPLC Product Marketing.
Mass Spec Predicts Improved Response to Anti-HER2 Therapy in Breast Cancer
Immunohistochemistry is the standard technique for detecting HER2 protein expression, it does not provide absolute quantification of this receptor and is prone to false-positives.
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