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LC-MS/MS METHOD FOR THE QUANTIFICATION OF PITOFENONE IN HUMAN PLASMA
B.M. Gurupadayya, S. Sharfuddin and R.S. Chandan

We developed LCMS/MS bioanalytical method for quantitative estimation of Pitofenone HCl in plasma is simple, sensitive, accurate, precise, and selective. Percentage recovery shows that the method is free from interference of matrix. The analytical method presented here has proved to be useful for investigation of the characteristics of Pitofenone in human plasma in pharmacokinetic and pharmacogenetic studies.

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Validation of HPLC analytical method for determination of biogenic amines in agricultural products
Hyeock Yoon, Jae-Hyung Mah

An analytical method was validated for the quantitative determination of biogenic amines (BA) in agricultural products. The validation results fulfill AOAC criteria and recommendations. This method has been applying to analyze BA in agricultural products for a total dietary survey in Korea.

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Non-target Screening of Contaminants in Paper-paperboard for Food Contact Materials
Lukas Vapenka*, Adam Vavrous**, Lenka Votavova*, Kristina Kejlova**, Jaroslav Dobias*, Jitka Sosnovcova**

The aim of this work was non-targeted screening of xenobiotics in paper and paperboard packaging materials used for food packaging in the Czech Republic.

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Development of an Analytical Strategy for Simultaneous Determination of Multiple Contaminants in Paper Food Packaging
Adam Vavrouš (1), Lukáš Vápenka (2), Kristina Kejlová (1), Jitka Sosnovcová (1), Dagmar Jírová (1)

We developed a method for simultaneous determination of polycyclic aromatic hydrocarbons, polyfluorinated compounds, ink photoinitiators, phthalates and bisphenols in paper food packaging employing GC–MS/MS and HPLC–MS/MS.

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METHOD DEVELOPMENT FOR THE SIMULTANEOUS DETERMINATION OF METHYLMERCURY AND INORGANIC MERCURY IN SEAFOOD
Sergio Carneado, Ariane V. Zmozinski, Carmen Ibáñez-Palomino, Àngels Sahuquillo, José Fermín López-Sánchez, Márcia M. da Silva

This work reports the method development for the simultaneous determination of methylmercury (MeHg+) and inorganic mercury (iHg) species in seafood. The study focused on the extraction and quantification of MeHg+ by liquid chromatography coupled to on-line UV irradiation and cold vapour atomic fluorescence spectroscopy (LC-UV-HG-AFS), using HCl 4 mol L-1 as extractant agent.

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Comprehensive and Confident Identification of Narcotics, Steroids, and Pharamaceuticals in Urine
David E. Alonso, Petra Gerhards, Charles Lyle, and Joe Binkley

-GC-HRT analysis provides an effectual “molecular profile” of samples
-Confident compound identification through spectral similarity searches & robust formula determinations for fragment, molecular and adduct ions

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Leveraging CI-H Mass Defect Plots for the Identification of Halogenated Organic Contaminants
Jonathan D. Byer, Mehran Alaee, Karl Jobst, Grazina Pacepavicius, Joe Binkley

A number of legacy contaminants and other pesticides, as well as a number of previously unknown compounds were tentatively identified in the pooled sample. Cl-H mass defect plots are a useful tool for filtering through complex data for the identification of halogenated contaminants. This technique functions as a screening tool for the identification of unknowns, and in the future, may be used as a form of fingerprinting to compare samples.

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Flash Pyrolysis Coupled to GCxGC-TOFMS and GC-High Resolution TOFMS for Characterization of Crude Oil and Petroleum Fractions
Clecio F. Klitzke, Joe Binkley, Jeffrey Patrick

The pyrolysis of asphaltenes from discrete crude oil samples shows distinct composition in terms of light and heavy aromatic hydrocarbons and alkyldibenzo-thiophenes. The use of Py–GC×GC–TOFMS is crucial for the determination of isomeric composition, and Py–GC–HRTOFMS with high resolution and high mass accuracy complements the identification by unequivocal chemical formula assignments. The study of the relationships of the crude oil and asphaltene composition are in progress.

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Analysis of Low Levels of Bisphenol A (BPA) in Canned Broths
Ken G. Espenschied, Michael Ye, Olga I. Shimelis, and Christine Dumas

Bisphenol A (BPA) is a primary monomer used in the manufacture of many plastics and epoxies. Some of these plastics are used as beverage containers and as liners and sealants for metal food containers. Because of BPA’s potential to act as an endocrine disrupter at low concentrations in humans, regulations have been enacted regarding BPA concentrations in food and beverages sold for human consumption.

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Showing Results 41 - 50 of 191
Scientific News
Altered Metabolism of Four Compounds Drives Glioblastoma Growth
Findings suggest new ways to treat the malignancy, slow its progression and reveal its extent more precisely.
Coding and Computers Help Spot Methane, Explosives
Coded apertures improve and shrink mass spectrometers for field use.
Why Bearcats Smell Like Buttered Popcorn
Researchers pinpoint chemical compound that gives rare animal its popcorn-like scent.
UCSD Scientists Receive NIH Grant to Combat Antibiotic Resistance
Interdisciplinary program will use systems biology approaches to understand how antibiotics work in concert with patient’s immune system.
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.
Novel Collagen Fingerprinting Identifies A Neanderthal
Study from the universities of Oxford and Manchester uses ZooMS technique to identify traces of an extinct human.
Hope for Combating Muscular Dystrophy
Decoding a sugar molecule and identifying a mechanism linking it to MS could help in the development of therapy for the disease.
Decoding Sugar Molecules Offers New Key For Combating Muscular Dystrophy
Japanese scientists find a rare sugar unit called ribitol 5-phosphate within the sugar molecules on the surface of muscle cells. Mutations in 3 genes linked to muscular dystrophy affect the creation of this sugar molecule.
A Vision for Precision Medicine
The University of Manchester and the University of Dundee partner to share disease screening data.
New Targets for Diabetes, Inflammation Discovered
The Scripps Research Institute and Salk Scientists discover 'outlier' enzymes that could offer new targets to treat diabetes and inflammation.
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