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Search Publications by: Rebecca A Zangmeister (Fed)

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Displaying 1 - 25 of 40

2018 National Institute of Standards and Technology Environmental Scan

March 26, 2019
Author(s)
Jason E. Boehm, Heather Evans, Ajitkumar Jillavenkatesa, Maria Nadal, Mark A. Przybocki, Paul Witherell, Rebecca A. Zangmeister
The 2018 National Institute of Standards and Technology Environmental Scan provide an analysis of the external factors that can influence NIST and the fulfillment of its mission as the agency looks to create a strategic plan for the coming years. The

3-Aminopropyltriethoxysilane Functionalization and Biotinylation of 4H-SiC for Immobilization of Streptavidin

June 1, 2012
Author(s)
Elissa H. Williams, Albert Davydov, John A. Schreifels, Mulpuri V. Rao, Abhishek Motayed, Siddarth Sundaresan, Peter Bocchini, Lee J. Richter, Gheorghe Stan, Kristen L. Steffens, Rebecca A. Zangmeister
(0001) 4H-SiC was functionalized with 3-aminopropyltriethoxysilane (APTES) and subsequently biotinylated for the immobilization of streptavidin. Atomic force microscopy (AFM), x-ray photoelectron spectroscopy (XPS), ellipsometry, fluorescence microscopy

A Lectin-Based Gold Nanoparticle Assay for Probing Glycosylation of Glycoproteins

April 17, 2012
Author(s)
Germarie Sanchez-Pomales, Todd A. Morris, James Falabella, Michael J. Tarlov, Rebecca A. Zangmeister
We report a glycoanalysis method in which lectins are used to probe the glycans of glycoproteins that are adsorbed on gold nanoparticles. A model mannose-presenting glycoprotein, ribonuclease B (RNase B), and the therapeutic monoclonal antibody (mAb)

Carbohydrate-Functionalized Surfactant Vesicles for Controlling Glycan Density

March 15, 2012
Author(s)
Monique A. Makos, Rebecca A. Zangmeister
We report on the development of a method for rapidly characterizing the glycan binding properties of lectins. Catanionic surfactant vesicles were prepared that spontaneously formed in water and remained stable at room temperature for months. By varying the

Method for Determining the Absolute Number Concentration of Nanoparticles from Electrospray

October 27, 2011
Author(s)
Mingdong M. Li, Suvajyoti S. Guha, Rebecca A. Zangmeister, Michael J. Tarlov, Michael R. Zachariah
We have developed a simple, fast, and accurate method to measure the absolute number concentration of nanoparticles in solution. The method combines electrospray-differential mobility analysis (ES-DMA) with a statistical analysis of droplet induced

Recent Advances in Electrochemical Glyco-biosensing

April 8, 2011
Author(s)
Rebecca A. Zangmeister, Germarie Sanchez-Pomales
Biosensors based on electrochemical transduction mechanisms have recently made advances into the field of glycan analysis. These glyco-biosensor assays offer simple, rapid, sensitive and economical approaches to the measurement need for rapid glycan

Quantification and Compensation of Unintentional Analyte Aggregation in Electrospray Sampling

March 30, 2011
Author(s)
Mingdong M. Li, Suvajyoti S. Guha, Rebecca A. Zangmeister, Michael J. Tarlov, Michael R. Zachariah
Electrospray (ES) sources are commonly used to introduce non-volatile materials (e.g. nanoparticles, proteins, etc.) in to the gas phase for characterization by mass spectrometry and ion mobility. Recent studies in our group using electrospray ion mobility

Nanotube Length Distributions Measured from Suspension by Electrospray-Differential Mobility Analysis

December 4, 2009
Author(s)
Leonard F. Pease III, De-Hao D. Tsai, Jeffrey A. Fagan, Barry J. Bauer, Rebecca A. Zangmeister, Michael J. Tarlov, Michael R. Zachariah
We present the first systematic characterization of well dispersed, length sorted single-walled carbon nanotubes (SWCNTs) by electrospray-differential mobility analysis (ES-DMA). Although understanding geometric properties of SWCNTs including their length

Equilibrium Electrostatics of Responsive Polyelectrolyte Monolayers

January 14, 2009
Author(s)
Rebecca A. Zangmeister, Rastislav Levicky, Kang Wang
The physical behavior of polyelectrolytes at solid-liquid interfaces presents challenges both in measurement and in interpretation. An informative, yet often overlooked, property that characterizes the equilibrium organization of these systems is their