JoVE Chemistry surveys a broad scope of chemical disciplines. This collection includes fundamental and applied research that investigates molecular interactions, properties, and structure spanning in the following core divisions: analytical, organic, organometallic, inorganic, bioinorganic, and biochemistry. This section also includes the design and preparation of materials and small molecules for advanced or unique applications.
1Complex Carbohydrate Research Center, University of Georgia, 2Department of Biochemistry and Molecular Biology, University of Georgia, 3Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University
In order to comprehensively explore the diversity of O-linked glycans, a new procedure for in-gel reductive β-elimination, combined with permethylation and a rapid phase-partition method, is applied to the analysis of O-linked glycans directly released from glycoproteins resolved by SDS-PAGE and amenable to subsequent glycomic analysis by mass spectrometry.
Published November 20, 2014. Keywords: Chemistry, glycoprotein, glycosylation, in-gel reductive β-elimination, O-linked glycan, sulfated glycan, mass spectrometry, protein ID, SDS-PAGE, glycomics, sulfoglycomics
1Department of Chemistry, Lehigh University
PAD4 is an enzyme responsible for the conversion of peptidyl-arginine to peptidyl-citrulline. Dysregulation of PAD4 has been implicated in a number of human diseases. A facile and high-throughput compatible fluorescence based PAD4 assay is described.
Published November 5, 2014. Keywords: Chemistry, PAD4, PADI4, citrullination, arginine, post-translational modification, HTS, assay, fluorescence, citrulline
1School of Life Sciences, University of Nottingham
Kinesins are characterized by nucleotide-dependent interaction with microtubules: a cycle of ATP turnover coupled to a cycle of microtubule interaction. Here, we describe protocols to analyze the kinetics of individual nucleotide transitions in the ATP turnover cycle of a kinesin using fluorescently labeled nucleotides and stopped-flow fluorescence.
Published October 17, 2014. Keywords: Chemistry, Kinesin, ATP turnover, mantATP, mantADP, stopped-flow fluorescence, microtubules, enzyme kinetics, nucleotide
1Chemistry and Biochemistry, Texas State University
Here, we present a protocol for the synthesis of two carbonyl-decorated carbenes. The protocol makes these interesting compounds readily available to chemists of all skill levels. In addition to the synthesis of these two carbenes, their use in the activation of white phosphorus is also described.
Published October 3, 2014. Keywords: Chemistry, electrophilic carbenes, white phosphorus, activation, organophosphorus, phosphaalkene, carbonyl
1MRC Centre for Regenerative Medicine, University of Edinburgh, 2School of Chemistry, University of Edinburgh, 3MRC Centre for Inflammation Research, University of Edinburgh
This article will focus on developing polymer coated surfaces for long-term, stable culture of stem cell derived human hepatocytes.
Published September 26, 2014. Keywords: Chemistry, Pluripotent stem cell, polyurethane, polymer coating, p450 metabolism, stable phenotype, gamma irradiation, ultraviolet irradiation.
1Department of Chemistry, Northwestern University, 2Department of Chemistry, Warsaw University of Technology, 3Department of Chemistry, Faculty of Science, King Abdulaziz University
Synthesis, activation, and characterization of intentionally designed metal-organic framework materials is challenging, especially when building blocks are incompatible or unwanted polymorphs are thermodynamically favored over desired forms. We describe how applications of solvent-assisted linker exchange, powder X-ray diffraction in capillaries and activation via supercritical CO2 drying, can address some of these challenges.
Published September 5, 2014. Keywords: Chemistry, Metal-organic frameworks, porous coordination polymers, supercritical CO2 activation, crystallography, solvothermal, sorption, solvent-assisted linker exchange
1Department of Chemistry, Institute of Organic Chemistry, Bielefeld University
This video presents a protocol for the mass spectrometrical analysis of volatile and oxidation sensitive compounds using electron impact ionization. The presented technique is especially of interest for inorganic chemists, working with metal organyls, silanes, or phosphanes which have to be handled using inert conditions, such as the Schlenk technique.
Published September 5, 2014. Keywords: Chemistry, mass spectrometry, electron impact, inlet system, volatile, air sensitive
1Decontamination Sciences Branch, U.S. Army Edgewood Chemical Biological Center, 2OptiMetrics, Inc., a DCS Company
In this paper, a procedure for quantifying the mass transport parameters of chemicals in various materials is presented. This process involves employing an inverse-analysis based diffusion model to vapor emission profiles recorded by real-time, mass spectrometry in high vacuum.
Published August 29, 2014. Keywords: Chemistry, Vacuum, vapor emission, chemical warfare agent, contamination, mass transport, inverse analysis, volatile organic compound, paint, coating
1Department of Biomedical Engineering, University of Texas at Austin, 2Department of Imaging Physics, University of Texas M.D. Anderson Cancer Center
Here, we describe a protocol for synthesis of magneto-plasmonic nanoparticles with a strong magnetic moment and a strong near-infrared (NIR) absorbance. The protocol also includes antibody conjugation to the nanoparticles through the Fc moiety for various biomedical applications which require molecular specific targeting.
Published August 22, 2014. Keywords: Chemistry, nanoparticles, plasmonic, magnetic, nanocomposites, magnetic trapping, circulating tumor cells, dark-field imaging
1Chemical Sensing & Fuel Technology, Chemistry Division, U.S. Naval Research Laboratory, 2NOVA Research, Inc., 3Bio/Analytical Chemistry, Chemistry Division, U.S. Naval Research Laboratory, 4Navy Technology Center for Safety and Survivability, Chemistry Division, U.S. Naval Research Laboratory
Trace explosive vapors of TNT and RDX collected on sorbent-filled thermal desorption tubes were analyzed using a programmed temperature desorption system coupled to GC with an electron capture detector. The instrumental analysis is combined with direct liquid deposition method to reduce sample variability and account for instrumentation drift and losses.
Published July 25, 2014. Keywords: Chemistry, Gas Chromatography (GC), Electron Capture Detector, Explosives, Quantitation, Thermal Desorption, TNT, RDX