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NIST Authors in Bold

Displaying 21751 - 21775 of 73461

Oxidatively Induced DNA Damage and Cancer

December 31, 2012
Author(s)
M Miral Dizdar
Endogenous and exogenous sources cause oxidatively induced DNA damage in living organisms by a variety of mechanisms. Resulting DNA lesions are mutagenic and, unless repaired, lead to a variety of mutations and consequently to genetic instability, which a

Forensic DNA Advisory Groups: DAB, SWGDAM, ENFSI, and BSAG

December 28, 2012
Author(s)
John M. Butler
A number of organizations exist around the world that work on a national or international level to aid quality assurance and to promote accurate forensic DNA testing. These organizations are made up primarily of working scientists who coordinate their

Hybrid Electro-Optically Modulated Microcombs

December 28, 2012
Author(s)
Pascal P. Del'Haye, Scott B. Papp, Scott A. Diddams
Optical frequency combs based on mode-locked lasers have proven to be invaluable tools for a wide range of applications in precision spectroscopy and metrology. Recently, a novel principle of optical frequency comb generation in whispering gallery mode

Meteorological extremes

December 28, 2012
Author(s)
Franklin T. Lombardo, Adam L. Pintar, Antonio Possolo, Emil Simiu, DongHun Yeo
This entry reviews basic principles of the statistical analysis of large extreme values (EVs), the role of simulations for the development of relevant meteorological data sets, the interaction between the extreme value modeling process and its application

Chemically Modifiable Fluorinated Copolymer Nanoparticles for 19F MRI Contrast Enhancement

December 27, 2012
Author(s)
Jessica L. Staymates, Mark M. Bailey, Steven R. Kline, Michael D. Anderson, Cory Berkland
Recently there has been interest in developing imaging contrast media for magnetic resonance imaging (MRI) that contain biologically rare, magnetically active nuclei such as fluorine. In principle, fluorinated contrast agents can be used to generate highly

Developmental Validation of the PowerPlex(R) ESI 17 Pro System

December 27, 2012
Author(s)
Carolyn R. Steffen, Margaret C. Kline, John Butler, Robert S. McLaren, Jaynish Patel, Margaret Ewing, Douglas R. Storts, Fabrice Noel, Sophie Dognaux
The SE33 locus is one of the most polymorphic markers used in human identification. However, it also possesses multiple microvariants both within the repeat and in the flanking regions. Such flanking region mutations can generate discordant allele calls

Phase Diagram and Crystal Chemistry of the La-Ca-Co-O System

December 27, 2012
Author(s)
Winnie K. Wong-Ng, William J. Laws, Yonggao Y. Yan
The phase diagram of the La-Ca-Co-O system at 885 °C in air has been determined. The system consists of two materials that have interesting thermoelectric properties, namely, the misfit layered thermoelectric oxide solid solution, (Ca, La)3Co4O9, and

Swelling of ultrathin crosslinked polyamide water desalination membranes

December 27, 2012
Author(s)
Edwin P. Chan, Allison P. Young, Jung-Hyun Lee, Jun-Young Chung, Christopher M. Stafford
We study the water swelling behavior of semi-aromatic crosslinked polyamide ultrathin films in order to characterize the materials properties of the polymer network. Specifically, we utilize X-ray reflectivity and quartz crystal microbalance to measure

Identification and Quantification of Human DNA Repair Protein NEIL1 by Liquid Chromatography/Isotope-Dilution Tandem Mass Spectrometry

December 26, 2012
Author(s)
M Miral Dizdar, Pawel Jaruga, Guldal Kirkali, Bryant C. Nelson, Gamze Tuna, Prasad T. Reddy
Accumulated evidence points to DNA repair capacity as an important factor in cancer and other diseases. DNA repair proteins are promising drug targets and are emerging as prognostic and therapeutic biomarkers. Thus, the knowledge of the overexpression or

Loop Structure Stability of a Double-Well-Lattice BEC

December 26, 2012
Author(s)
James V. Porto, Hoi-Yin Hui, Ryan Barnett, Sankar Das Sarma
In this work, we consider excited many-body mean-field states of bosons in a double-well optical lattice by investigating stationary Bloch solutions to the non-linear equations of motion. We show that, for any positive interaction strength, a loop

Successive Phase Transitions and Extended Spin-Excitation Continuum in the S=1/2 Triangular-Lattice Antiferromagnet Ba 3 CoSb 2 ) 9

December 26, 2012
Author(s)
H. D. Zhou, Cenke Xu, A. M. Hallas, H. J. Silverstein, C. R. Wiebe, I. Umegaki, J. Q. Yan, T. P. Murphy, J.-H. Park, Yiming Qiu, John R. Copley, Jason S. Gardner, Y. Takano
Using magnetic, thermal and neutron measurements on single-crystal samples, we show that Ba 3CoSb 2O 9 is a spin-1/2 triangular-lattice antiferromagnet with easy-axis anisotropy and two magnetic phase transitions bracketing an intermediate up-up-down phase

The equilibrium states of open quantum systems in the strong coupling regime

December 26, 2012
Author(s)
Jacob M. Taylor, Yigit Subasi, Chris Fleming, Bei L. Hu
In this work we investigate the late-time stationary states of open quantum systems coupled to a thermal reservoir in the strong coupling regime. This is because in general such systems do not necessarily relax to a Boltzmann distribution if the coupling

High Resolution Length Fractionation of Surfactant Dispersed Carbon Nanotubes

December 23, 2012
Author(s)
Constantine Y. Khripin, Xiaomin X. Tu, Jeffrey A. Fagan, Ming Zheng
Length fractionation of colloidal carbon nanotube dispersions is required for many studies. Size- exclusion chromatography (SEC) has been reported as a reliable method for high resolution length fractionation of DNA-dispersed single-wall carbon nanotubes

Characterization of the US Construction Labor Supply

December 21, 2012
Author(s)
Stanley W. Gilbert
This study characterizes the construction labor pool, and carries out preliminary work toward an estimation of the supply and demand for construction labor. Specifically, it evaluates the composition of the construction labor force by race, age

Design of the permanent magnet system for NIST-4

December 21, 2012
Author(s)
Stephan Schlamminger
At the National Institute of Standards and Technology a new watt balance, NIST-4, is currently being designed. This apparatus will be used to realize the unit of mass after the redefinition of the SI has taken effect. In order to ensure smooth operation

NIST Handbook 150-11, NVLAP Electromagnetic Compatibility and Telecommunications

December 21, 2012
Author(s)
Bethany E. Hackett, Bradley Moore, Dennis G. Camell
NIST Handbook 150-11, NVLAP Electromagnetic Compatibility and Telecommunications, presents the technical requirements and guidance for the accreditation of laboratories under the NVLAP Electromagnetic Compatibility and Telecommunications (ECT) LAP. It is

NIST Micronutrients Measurement Quality Assurance Program Winter 2012 Comparability Studies Results for Round Robin LXXI Fat-Soluble Vitamins and Carotenoids in Human Serum and Round Robin 36 Ascorbic Acid in Human Serum

December 21, 2012
Author(s)
David L. Duewer, Jeanice M. Brown Thomas
The National Institute of Standards and Technology coordinates the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- and water-soluble vitamins and carotenoids in human serum and plasma. This report describes
Displaying 21751 - 21775 of 73461
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