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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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Fast and Efficient Analysis of Polynuclear Aromatic Hydrocarbons in Edible Oils Using Dual-Layer SPE
Christine Dumas and Katherine Stenerson

A new dual-layer cartridge for the efficient extraction of PAHs from edible oils

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Total Phenolics and Beta-1,3-Glucans Extracted from Medicinal Mushrooms (Ganoderma lucidum, Inonotus obliquus, and Phellinus linteus)
Jaecheol Kim, Kiuk Lee, Keum Taek Hwang(1), Gichun Yoo(2)

This study was to analyze the total phenolics, beta-glucans, and beta-1,3-glucans in water extracts of three medicinal mushrooms (Ganoderma lucidum(GL), Inonotus obliquus(IO), and Phellinus linteus(PL)) under different extraction conditions.

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Microextraction techniques combined with X-ray fluorescence spectrometry for determination of different metal ions in water
Karina Kocot (a), Beata Zawisza (a), Eva Marguí (b), Ignasi Queralt (c), Rafal Sitko (a)

In present work new preconcentration procedures combining microextraction techniques and X-ray fluorescence spectroscopy were developed. Proposed methodologies are promising tools for multielemental analysis enabling detection of natural pollutants in different water samples.

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Application of Central Composite Design (CCD) for the Optimization of Ultrasound-assisted Extraction (UAE) of Phenolics from Corn (Zea mays)
Widiastuti Setyaningsih, 1,2 Erwan Duros, 3 Ceferino Carrera, 4 Miguel Palma, 2 Carmelo G. Barroso 2

A new Ultrasound-assisted Extraction (UAE) of phenolic compounds from corn (Zea mays) has been optimized by means of chemometrics tool. The proposed method was validated and successfully applied to the analysis of phenolics content in several corn cultivars.

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Metabolism of Eight Model Pharmaceutical Compounds in Rat and Human HepatoPac Versus Liver Microsomes and Suspension Hepatocyte Platforms
Julius O. Enoru, William DeMaio, Adiba Watanyar, Kenneth Draper, Amanda Moore & Okey Ukairo

This poster presents our comparative metabolite profiling analysis of eight model pharmaceutical compounds with various biotransformation reactions using a functionally stable model of primary hepatocytes [micropatterned co-cultures (MPCCs)] in parallel with the traditional liver microsomal and suspension hepatocyte systems.

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Characterization of Proteins and Protein Self Association (Oligomerization) with SEC-MALS
Michel Terray, Mark Pothecary

In this poster, a series of proteins and their oligomers were characterized using SEC-MALS with UV and RI detection. The monomer molecular weights are measured and compared with those from column calibration. The molecular weights of their oligomers are also compared with column calibration and the differences explored.

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MsCompare: An Untargeted LC & GC/MS Metabolomics Platform for Quality Control, Precise Deconvolution and Data Analysis
Marco Ruijken

A GC/MS or LC/MS workflow for Metabolomics applications includes a number of distinct steps: experimental design, sampling, sample preparation, data acquisition, data processing, deconvolution, identification and data interpretation.

The MsXelerator software includes Quality Control procedures and Analysis of Variance (ANOVA) to properly control each step in this workflow and to obtain reliable results for both quantitation and identification.

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Showing Results 41 - 50 of 182
Scientific News
Spotlight on Acoustic Liquid Handling
Journal of Laboratory Automation special issue highlights how acoustic liquid handling enables breakthrough innovations.
Microbes Take Their Vitamins
Scientists exploit organisms' needs in order to track 'vitamin mimics' in bacteria.
Keeping a Specimen's Story Straight
Imagine 96 people standing shoulder to shoulder, not touching and attempting to breathe only the air un-exhaled by the others. Sound impossible?
Portable Kit Can Recover Traces of Chemical Evidence
A chemist at the National Institute of Standards and Technology (NIST) has developed a portable version of his method for recovering trace chemicals such as environmental pollutants and forensic evidence including secret graves and arson fire debris.
Diagnosis of Two Rare Childhood Diseases Improved
For the first time, researchers have developed tests that could improve the diagnosis of two rare childhood diseases known as congenital disorders of glycosylation (CDGs) and metachromatic leukodystrophy, and that could even lead to new treatments for CDGs.
Cleaning Out the Membrane Each Day
Cell membranes are made up of a lipid bilayer that is constantly changing due to the flux of material in and out of the cell.
New Test for Cancer and Diabetes Biomarkers
University of Warwick researchers developed the test to help identify molecules in collagen.
Cooperating Bacteria Isolate Cheaters
Bacteria, which reciprocally exchange amino acids, stabilize their partnership on two-dimensional surfaces and limit the access of non-cooperating bacteria to the exchanged nutrients.
Novel Approach to Understanding Brain Function
Russell Poldrack scanned his brain to create the most detailed map of brain connectivity ever.
Periodic Table of Protein Complexes
New tool helps to visualise, understand and predict how proteins combine to drive biological processes.
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