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Fragmentation Trees for Automated de novo Interpretation of Impure Electron Ionization Spectra from Gas Chromatographic Complex Mixture Analysis—Chemical Deconvolution
Kevin Siek, Vasily Makarov, Viatcheslav Artaev, Dmitry Mazur, Albert T. Lebedev

-Chemical deconvolution algorithms accurately reported independent
components of dead coelutions where such components belong to distinct chemical classes.
-Present algorithms fail to distinguish chemically similar analytes such as branched and linear alkanes, thus chemical deconvolution is not a
substitute for GCxGC.
-Chemical deconvolution algorithms accurately rejected more than 80% of spurious signals from manually curated spectra found to be contaminated with unrelated signa

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An Efficient Method for the Incorporation of Molecular Probes at Multiple/Specific sites in RNA: Levulinyl Protection for 2'-ACE ® , 5'-Silyl Oligoribonucleotide Synthesis
Xiaoqin Cheng, Shawn Begay, Randy Rauen, Kelly Grimsley, Kaizhang He, Michael Delaney

A unique method that uses a levulinate ester as a protecting group to introduce conjugates or molecular probes to virtually any location in a synthetic RNA molecule is discussed. The Levulinyl protecting group is stable in RNA synthesis conditions and can be removed without affecting the other parts of the synthesized RNA. We show the capabilities of this approach with three high-complexity synthesis examples.

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Acoustophoretic microfluidic device for high throughput DNA sequencing
V.V Unnikuttan1, H.N Unni 1

Multiphysics modelling for acoustic standing wave technology combined with micro-technology which can be used for manipulation and concentration on typical Lab-on-Chip devices for DNA sequencing.

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Advanced Microfluidic Mixing Device for the Study of Macromolecule Dynamics
Shubha Jain, F. Azam, H.N.Unni

We have developed and characterized a micro-fluidic mixer to study the macro-molecule dynamics such as kinetics of protein folding, DNA sequencing, single molecule study and detection etc. on a micro-second timescale. It is observed that geometry of channel has significant impact on the mixing performance of channel and also mixing time. This mixer could be used for trapping, sequencing of micro and macro molecules such as cell, DNA and protein samples under flow condition

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Development of a Paper-Based Fluidic Device for Phosphorus Detection
Patricia K. Rusch and Kyle A. Cissell

This poster displays the successful beginning stages of an innovative way to detect phosphorus in standing bodies of water by minimizing the quantity of chemicals used, reducing the cost of analysis instrumentation, allowing the potential for real-time monitoring, and producing consistent and reliable results.

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Assessment of the efficiency of encapsulation of a fluorescent drug using Nanoparticle Tracking Analysis
Patrick Hole, Pierre Peotta, Roberto Santoliquido, Bob Carr

This poster outlines an example where the methodology of Nanoparticle Tracking Analysis (NTA) is used to characterise nanoparticles for drug delivery purposes.

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Effective Comparison of Yeast Extracts Using High Resolution GC and GCxGC-HRTOFMS
David E. Alonso and Joe Binkley

The Pegasus GC-HRT and GC-HRT 4D instruments are effective tools for the comprehensive analysis of yeast extracts.
• Enhanced chromatographic resolution of the HRT 4D system facilitated compound characterization by improving spectral similarity scores
• High quality data resulted in excellent spectral similarity scores when compared to large, well-established databases (NIST, Wiley)
• High resolution, accurate mass data was crucial for determination of fragment, molecular, and adduct

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Performance Characteristics of a Comprehensive Two=Dimensional Gas Chromatography-High Resolution Time-of=Flight Mass Spectrometry System (GCxGC=HRTOFMS) Utilizing Chemical Ionization
Jonelle Shiel, Mark Merrick, Scott Pugh, Matthew Soyk, and Viatcheslav Artaev

Combining comprehensive two-dimensional gas chromatography (GC×GC) with a High Resolution Time-of-Flight Mass Spectrometer and Chemical Ionization is a powerful tool for compound identification. Performance of the LECO Pegasus GC-HRT 4D using Chemical Ionization (CI) was demonstrated using Benzophenone and Diesel. GC×GC separation results in narrow peaks, therefore, a high speed detection system is necessary.

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Non-Target Analysis of Electronic Waste Samples from China
Jonathan D. Byer, Ed Sverko, Kurunthachalam Kannan, Qian Wu, Joe Binkley

GC×GC-HRT is a powerful tool for the comprehensive analysis and
chemical characterization of analytes in complex matrices. The combination of high resolution front-end separation with high
resolution time-of-flight mass spectrometry made possible the
identification of compounds previously unknown in these samples.

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Showing Results 71 - 80 of 1366
Scientific News
The Rise of 3D Cell Culture and in vitro Model Systems for Drug Discovery and Toxicology
An overview of the current technology and the challenges and benefits over 2D cell culture models plus some of the latest advances relating to human health research.
Grant Supports Project To Develop Simple Test To Screen For Cervical Cancer
UCLA Engineering announces funding from Bill and Melinda Gates Foundation.
Injecting New Life into Old Antibiotics
A new fully synthetic way to make a class of antibiotics called macrolides from simple building blocks is set to open up a new front in the fight against antimicrobial drug resistance.
Insight into Bacterial Resilience and Antibiotic Targets
Variant of CRISPR technology paired with computerized imaging reveals essential gene networks in bacteria.
Advancing Protein Visualization
Cryo-EM methods can determine structures of small proteins bound to potential drug candidates.
Alzheimer’s Protein Serves as Natural Antibiotic
Alzheimer's-associated amyloid plaques may be part of natural process to trap microbes, findings suggest new therapeutic strategies.
Slime Mold Reveals Clues to Immune Cells’ Directional Abilities
Study from UC San Diego identifies a protein involved in the directional ability of a slime mold.
How Do You Kill A Malaria Parasite?
Drexel University scientists have discovered an unusual mechanism for how two new antimalarial drugs operate: They give the parasite’s skin a boost in cholesterol, making it unable to traverse the narrow labyrinths of the human bloodstream. The drugs also seem to trick the parasite into reproducing prematurely.
Illuminating Hidden Gene Regulators
New super-resolution technique visualizes important role of short-lived enzyme clusters.
Supressing Intenstinal Analphylaxis in Peanut Allergy
Study from National Jewish Health shows that blockade of histamine receptors suppresses intestinal anaphylaxis in peanut allergy.
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