Tags: Analytical Seminar


Quantification of C=C isomers Using Aziridine-Based Isobaric Mass Tagging

In response to environmental stress, living organisms are known to actively alter their membrane lipid compositions in their cell membranes to maintain cellular function and integrity. Glycerophospholipids, a main component of bacterial and human cell membranes, consist of a phosphate headgroup, glycerol backbone, and two fatty acids chains attached at either the sn-1 or sn-2 positions. Recent studies revealed the shift in the relative…


Literature Seminar: Alyssa Wright


Guest Speaker: Prof. Rafael Montenegro Burke


Analytical Seminar: Prof. Jonathan Amster


Bridging the Academia-Industry Divide: Preparing Undergraduate Students for Roles in Chemical Industry

While there has been a recent emphasis in the field of chemistry education research on bridging the gap between research and practice, another important divide warrants attention: the growing gap between undergraduate academia and chemical industry. According to recent American Chemical Society data, approximately 70% of chemistry graduates enter industry directly after earning their bachelor’s degree. However, little is known about how these…


Charge Detection-MS: Opening a New Frontier of Mass Spectrometry

Techniques for the detection of extremely high mass ions or the analysis of heterogenous samples in mass spectrometry are often limited by overlapping charge states and poor resolution.1 The invention of electrospray ionization allowed for ionization of increasingly larger ions in mass spectrometry where multiple charging allows for the mass-to-charge ratio to be much lower than the molecular mass.2 In traditional mass spectrometry, the mass-to-…


Targeted LC–MS/MS Characterization of PFAS in Food Packaging and Their Migration into Food Simulants

Food packaging materials extensively utilize PFAS compounds for their exceptional grease and moisture resistance properties, yet their environmental persistence and potential health implications necessitate robust analytical methodologies.1 The primary analytical challenges arise from PFAS structural diversity, ultra-trace concentrations, and complex matrix interference from packaging substrates. Contemporary LC–MS/MS methodologies address these…


Generative Diffusion-Based De Novo Protein Design of Lipid/CD1-Restricted TCR Mimics

De novo protein design has experienced a renaissance in recent years due to advances in generative diffusion-based approaches to develop high affinity, target-specific binders. However, the ability of these tools to generate “new-to-nature” proteins with unique backbones and amino acid sequences that target lipid/protein assemblies has not yet been explored. Here, we apply an end-to-end design pipeline using RFdiffusionAA, LigandMPNN, Chai-…


Structural Analysis of Intact Glycosaminoglycan Mixtures with Capillary Electrophoresis and High Resolution Tandem Mass Spectrometry

Glycosaminoglycans (GAGs), linear polysaccharides found near the cell membrane as proteoglycans and free oligosaccharides, play important roles regarding cell functions. GAGs have been implicated as potential biomarkers in many diseases like cancer and kidney related diseases and are used as therapeutics for many types of ailments. Because they are highly sulfated, complex GAGs have been analyzed with reverse polarity capillary electrophoresis (…


Tandem-Trapped Ion Mobility Spectrometry for Characterizing Structure and Function of Proteoforms

Cellular processes depend on the coordinated function of all proteoforms—the distinct molecular forms of a protein that arise from mechanisms such as alternative splicing and post-translational modifications. Different proteoforms can have distinct free energy landscapes that may alter their structures, motions, and interactions with other proteins. As a result, changes in proteoforms can alter cellular regulation and lead to…
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