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Displaying 926 - 950 of 2028

Controlling Thermochromism in a Photonic Block Copolymer Gel

September 26, 2012
Author(s)
Joseph J. Walish, Yin Fan , Andrea Centrone, Edwin L. Thomas
Controlling the color via temperature-induced changes of self-assembled photonic materials is important for their application in sensors and displays. The thermochromic behavior of a PS-P2VP photonic gel was studied (UV-VIS, FTIR) and found to originate

Expression and characterization of 15N-labeled human C-reactive protein in Escherichia coli and Pichia pastoris for use in isotope-dilution mass spectrometry

September 1, 2012
Author(s)
Eric L. Kilpatrick, Wei-Li Liao, Johanna Camara, Illarion V. Turko, David M. Bunk
Isotope dilution mass spectrometry using stable isotope labeled internal standards is unsurpassed in its ability to quantify analytes with accuracy and low measurement uncertainty. The extension of this technique to proteins relies upon the expression of

Measuring Single-Walled Carbon Nanotube Length Distributions from Diffusional Trajectories

August 27, 2012
Author(s)
Jason Streit, Sergei M. Bachilo, Anton V. Naumov, Constantine Y. Khripin, Ming Zheng, R B. Weisman
A new method is demonstrated for measuring the length distributions of dispersed single-walled carbon nanotube (SWCNT) samples by analyzing diffusional motions of many individual nanotubes in parallel. In this method, termed Length Analysis by Nanotube

Mass spectrometry quantification of clusterin in the human brain

August 20, 2012
Author(s)
Junjun J. Chen, Meiyao M. Wang, Illarion V. Turko
A multifunctional glycoprotein clusterin has been associated with late-onset Alzheimer’s disease (AD). This finding should prompt further investigation to define the role of clusterin in AD phenotypes. For that reason, the development of techniques to

Recommended vapor pressure and thermophysical data for ferrocene

August 14, 2012
Author(s)
Michal Fulem, Kvetoslav Ruzicka, Marisa A. Rocha, Luis M.N.B.F. Santos, Robert F. Berg
Recommended vapor pressure data for ferrocene (CAS Registry Number: 102-54-5) in the temperature range from 242 to 447 K were developed by the simultaneous correlation of critically assessed vapor pressures, heat capacities of the crystalline phase and the

Noble gas viscosities at 25 degrees C

August 10, 2012
Author(s)
Robert F. Berg, William C. Burton
Near 25 C, ab initio calculations of the zero-density viscosity of helium gas eta_He have an uncertainty of approximately 0.001 %, which is 1/40th of the uncertainty of the best measurements. The uncertainties of the published calculations for neon [Bich

Ionic Liquid Facilitated Introduction of Functional Materials into Biopolymer Polymer Substrates

August 2, 2012
Author(s)
Shonali Nazare, Jeffrey W. Gilman, Mauro Zammarano, Luke Haverhals, W.Matthew Reichert, Hugh De Long, Paul C. Trulove
In addition to being efficient solvents for biopolymers, several ionic liquids (ILs) have been shown to be effective solvents for synthetic polymers such as meta-aramids, i.e., Nomex ® (1-5). In this report, meta-aramid/cotton composites are generated by

SEABIRD TISSUE ARCHIVAL AND MONITORING PROJECT: Egg Collections and Analytical Results for 2006-2009

August 2, 2012
Author(s)
Stacy S. Schuur, Paul R. Becker, Sylvain Berail, Russell D. Day, Olivier F. Donard, Keith A. Hobson, Amanda J. Moors, Rebecca S. Pugh, Lauren B. Rust, David G. Roseneau
Since 1999, the Seabird Tissue Archival and Monitoring Project (STAMP) has collected, banked, and analyzed seabird eggs using established protocols to monitor chlorinated pesticides, polychlorinated biphenyls (PCBs), brominated flame retardants, and

Comparison of JP-8 and JP-8+100 with the Advanced Distillation Curve Approach

August 1, 2012
Author(s)
Thomas J. Bruno, Kathryn R. Abel, Jennifer Riggs
Additive packages are used with aviation kerosenes to achieve performance enhancements such as higher or lower operating temperatures or increased lubricity. An additive used to increase operating temperatures for heat sink applications is the +100

Solubility of Water in 1-Octanol from 2 degC to 96 degC

July 25, 2012
Author(s)
Brian E. Lang
The solubility of water in 1-octanol was measured from 2 °C to 96 °C by coulometric Karl Fischer titration. The mass fraction solubility at 25 ° was found to be (48.91 ± 0.13) mg/g. Experiments also indicated the existence of a pseudo-equilibrium state

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

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
Displaying 926 - 950 of 2028