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Biodiesel Fuels from Supercritical Fluid Processing: Quality Evaluation with the Advanced Distillation Curve Method and Cetane Numbers

July 9, 2012

Author(s)

Thomas J. Bruno, George G. Anitescu, Lawrence L. Tavlarides

To develop efficient reactor and plant designs to optimize the process of biofuel production, thermophysical and chemical properties of various reactive mixtures as well as those of biofuel are required over wide range of conditions. In this study, the

Identification of Isethionic Acid and Other Small Molecule Metabolites of Fragilariopsis cylindrus with Nuclear Magnetic Resonance

July 8, 2012

Author(s)

Dan Bearden, Arezue F. Boroujerdi, Peter A. Lee, Giacomo R. DiTullio, Michael G. Janech, Sarah B. Vied

Nuclear magnetic resonance (NMR)-spectroscopy has been used to obtain metabolic profiles of the polar diatom Fragilariopsis cylindrus, leading to the identification of a novel metabolite in this organism. Initial results from an ongoing metabolomics study

On the Molar Mass of Silicon for a New Avogadro Constant

July 1, 2012

Author(s)

Gregory C. Turk, Robert D. Vocke Jr., Savelas A. Rabb

On spectroscopic models of the O2 A-band and their impact upon atmospheric retrievals

June 27, 2012

Author(s)

David A. Long, Joseph T. Hodges

Highly accurate spectroscopic models for O2 A-band absorption are required in numerous satellite- and ground-based remote sensing measurements of atmospheric greenhouse gases. In this study, we quantify the sensitivity of the calculated A-band transmission

Hydrodynamic chromatography

June 21, 2012

Author(s)

Andre M. Striegel, Amandaa Brewer

Hydrodynamic chromatography (HDC) has experienced a resurgence in recent years for particle and polymer characterization due, principally, to its coupling to a multiplicity of physical detection methods. Coupled to light scattering (both multi-angle static

Hydrocarbon Binary Diffusion Coefficient Measurements for Use in Combustion Modeling

June 18, 2012

Author(s)

William S. McGivern, Jeffrey A. Manion

Recent studies have identified uncertainties in fuel diffusion coefficients as a source of significant uncertainty in combustion modeling. This paper presents accurate binary diffusion coefficients of linear hydrocarbons in helium and nitrogen at

Investigation of Silica Nanoparticles Accumulated on the Surface of Polymer Nanocomposites Exposed to UV Radiation Using ICP-OES

June 18, 2012

Author(s)

Savelas A. Rabb, Lee L. Yu, Deborah S. Jacobs, Tinh Nguyen

Silica nanoparticles (nanosilica) are being utilized to enhance the mechanical performance of polymeric materials used in many industries. However, cumulative effects of ultraviolet (UV) radiation will degrade the polymeric molecules, resulting in a

The Characterization of Copolymers and Blends by Quintuple-Detector Size-Exclusion Chromatography

June 14, 2012

Author(s)

Andre M. Striegel, Steven Rowland

The properties imparted, oftentimes synergistically, by the different components of copolymers and blends account for the widespread use of these in a variety of industrial products. Most often, however, processing and end-use of these materials

Glycoprotein Analysis Using Mass Spectrometry: Unraveling the Layers of Complexity

June 12, 2012

Author(s)

John E. Schiel

It is generally understood that DNA serves as the direct template that eventually encodes a protein responsible for biochemical function. Alterations of a protein after synthesis (post-translational modifications, PTMs) can play a large role in a proteins

Preparation and Measurement Methods for Studying Nanoparticle Aggregate Surface Chemistry

June 8, 2012

Author(s)

Christopher W. Szakal, James McCarthy, Andrew R. Konicek, Kacie Louis, Benjamin Yezer, Andrew A. Herzing, Robert Hamers, Richard D. Holbrook

Despite best efforts at controlling nanoparticle (NP) surface chemistries, the environment surrounding nanomaterials is always changing and can impart a permanent chemical memory. We present a set of preparation and measurement methods to be used as the

Cold Neutron Activation Analysis, a Nondestructive Technique for Hydrogen Level Assessment in Zirconium Alloys

June 1, 2012

Author(s)

Rick L. Paul, Adrien Couet, Arthur Motta, Robert Comstock

We propose a novel use of a non-destructive technique to quantitatively assess hydrogen concentration in zirconium alloys. The technique, called Cold Neutron Prompt Gamma Activation Analysis (CNPGAA), is based on measuring prompt gamma rays following the

Perfluoroalkyl Contaminants in Plasma of Five Sea Turtle Species: Comparisons in Concentration and Potential Health Risks

May 23, 2012

Author(s)

Jennifer M. Lynch, Lily Ngai, Joanne Braun-McNeill, Larry Wood, Kelly Stewart, Steven O'Connell, John R. Kucklick

We compared the plasma concentration of 13 perfluorinated contaminants (PFCs) in five sea turtle species. Perfluorooctane sulfonate (PFOS) was predominant in most species, except hawksbills had higher concentrations of perfluorononanoate. Excluding

A Guide to Using SRM 2569 to Validate Analytical Methods

May 17, 2012

Author(s)

John R. Sieber, John L. Molloy

A users guide is presented for Standard Reference Material (SRM) 2569 Lead in Paint Films for Childrens Products. This SRM consists of paint films on coupons of polyester with the paint characterized for mass fraction of Pb, mass of Pb per unit area

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