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Displaying 17601 - 17625 of 73970

Quantitative magnetometry of ferromagnetic nanorods by microfluidic analytical magnetophoresis

September 3, 2015
Author(s)
Andrew L. Balk, Lamar O. Mair, Feng Guo, Carlos M. Hangarter, Pramod Mathai, Robert D. McMichael, Samuel M. Stavis, John Unguris
We introduce an implementation of magnetophoresis to measure the absolute magnetization of ferromagnetic nanorods dispersed in fluids, by analyzing the velocity of single nanorods under an applied magnetic field gradient. A microfluidic guideway prevents

Retention projection enables accurate calculation of liquid chromatographic retention times across labs and methods

September 3, 2015
Author(s)
Yamil Simon, Daniel Abate-Pella, Dana M. Freund, Yan Ma, Adrian Hegeman, Yan Ma, Tobias Kind, O Fiehn, Birgit Beck, Emma L. Schymanski, Corey D. Broeckling, David V. Huhman, Lloyd W. Summer, Oleg V. Krokhin, Dwight R. Stoll
Identification of small molecules by liquid chromatography-mass spectrometry (LC-MS) could be greatly improved if the chromatographic retention information could be used along with mass spectral information to narrow down the lists of potential identities

Viscosity Measurements of Aviation Turbine Fuels

September 3, 2015
Author(s)
Tara J. Fortin, Arno D. Laesecke
Kinematic viscosity has been measured for nine separate aviation turbine fuel samples. The nine samples span the range of fuel types available: conventional petroleum-derived fuels, synthetic fuels derived from the Fischer-Tropsch process, and renewable

Conductance Hysteresis in the Voltage-Dependent Anion Channel

September 1, 2015
Author(s)
Shay M. Rappaport, Oscar Teijido, David Hoogerheide, Tatiana K. Rostovtseva, Alexander M. Berezhkovskii, Sergey M. Bezrukov
In contrast to the voltage gating of ion-selective channels of electrophysiology, the mechanisms of voltage sensitivity of ¿large¿ beta-barrel channels remain obscure, even at the conceptual level. Here we study hysteresis in the conductance response of

Correction for stray light in optical spectroscopy of crystals

September 1, 2015
Author(s)
Richard W. Hendler, Curtis Meuse, David Travis Gallagher, Joerg Labahn, Jan Kubicek, Paul D. Smith, John W. Kakareka
It has long been known in spectroscopy that light not passing through a sample, but reaching the detector (i.e. stray light) results in a distortion of the spectrum known as absorption- flattening. In spectroscopy with crystals, one must either include

EIT Quantum Memory with Cs Atomic Vapor for Quantum Communication

September 1, 2015
Author(s)
Lijun Ma, Oliver T. Slattery, Paulina S. Kuo, Xiao Tang
Quantum memory is a key device in the implementation of quantum repeaters for quantum communications and quantum networks. We demonstrated a quantum memory based on electromagnetically-induced transparency (EIT) in a warm cesium atomic cell. The quantum

Muffin tin potentials in EXAFS analysis

September 1, 2015
Author(s)
Bruce D. Ravel
Muffin tin potentials are the standard tool for calculating the potential surface of a cluster of atoms for use in the analysis of extended x-ray-absorption fine-structure (EXAFS) data. The set of Cartesian coordinates used to define the positions of atoms

On-Chip Integrated Silicon Photonic Thermometers

September 1, 2015
Author(s)
Nikolai N. Klimov, Thomas P. Purdy, Zeeshan Ahmed
The fundamental limitations of resistance-based thermometry and the desire to reduce sensor ownership have produced considerable interest in the development of photonics-based temperature sensors as an alternative to resistance thermometers. Photonic

Optimizing Data Logger Setup for Vaccine Temperature Monitoring

September 1, 2015
Author(s)
Michal J. Chojnacky, Luis Chaves Santacruz, W Wyatt Miller, Gregory F. Strouse
Accidental freezing of refrigerated vaccine represents a significant public and private healthcare cost. Freeze-damaged vaccines lose their effectiveness, putting communities at risk. U.S. immunization programs have strengthened vaccine storage and

Perceptual expertise in forensic facial image comparison

September 1, 2015
Author(s)
P. Jonathon Phillips, David White, Alice O'Toole, Carina A. Hahn, Matthew Hill
Forensic facial identification examiners are required to match the identity of faces in images that vary substantially, owing to changes in viewing conditions and in a person's appearance. These identifications affect the course and out- come of criminal
Displaying 17601 - 17625 of 73970
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