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Search Publications

NIST Authors in Bold

Displaying 12476 - 12500 of 13226

Neutron Reflectometry and QCM-D Study of the Interaction of Cellulases with Films of Amorphous Cellulose

May 9, 2011
Author(s)
Gang Cheng, Zelin Liu, Jaclyn K. Murton, Michael Jablin, Manish Dubey, Jaroslaw Majewski, Candice Halbert, James Browning, John F. Ankner, Bulent Akgun, Chao Wang, Alan R. Esker, Kenneth L. Sale, Blake. Simmons, Michael S. Kent
… soluble enzymes interact with insoluble cellulose will aid in the design of more efficient enzyme systems. We report a … to interfacial roughness, while QCM-D provides changes in mass and film stiffness. NR can be performed using either … reservoirs. NR measurement of swelling of a cellulose film in D 2 O and in H 2 O revealed that D/H exchange on the …

NIST Tools for Quality Assurance in Botanical Dietary Supplement Measurements

April 7, 2011
Author(s)
Melissa M. Phillips
… to the difficulty. The National Institute of Standards and Technology (NIST) has been working with the National … that can be useful to the dietary supplement community. In addition, NIST administers a dietary supplement laboratory quality assurance program (DSQAP) in which 88 laboratories have participated. Laboratory inter- …

A Human Urine Standard Reference Materials for Accurate Assessment of Arsenic Exposure

March 17, 2011
Author(s)
Lee L. Yu, Carl Verdon, William C. Davis, Gregory C. Turk, Kathleen Caldwell, Robert Jones, Brian Buckley, Ruimin Xie
… of the element is dependent upon the molecular form it is in. Accurate assessments of arsenic exposure require the … panel of inorganic, organic, and metabolite As species in urine, including arsenite (AsIII), arsenate (AsV), … produced by the National Institute of Standards and Technology (NIST) and the Centers for Disease Control and …

Internal Curing: A 2010 State-of-the-Art Review

February 9, 2011
Author(s)
Dale P. Bentz, Jason Weiss
… The American Concrete Institute in 2010 defined internal curing as supplying water throughout … While internal curing has been inadvertently included in many lightweight concretes produced within the past 100 … only within the first decade of the 21st century that this technology has been intentionally incorporated into concrete …

CHARACTERIZING FIREBRAND EXPOSURE DURING WILDLAND-URBAN INTERFACE FIRES.

February 2, 2011
Author(s)
Samuel L. Manzello, Ethan I. Foote, John Liu
… Angora Fire, a severe Wildland-Urban Interface (WUI) fire in California. Of the 401 houses that received direct … as firebrands, and the starting of ("^)spot fires("^) in unburned vegetation ahead of wildfires has been observed … studies conducted by National Institute of Standards and Technology (NIST) and from historical firebrand field …

A gas pressure scale based on primary standard piston gauges

December 6, 2010
Author(s)
Douglas A. Olson, Robert G. Driver, Walter J. Bowers Jr.
… The National Institute of Standards and Technology has redefined its gas pressure scale, up to 17 … gauges. The primary standard piston gauges are 35.8 mm in diameter and operate from 20 kPa to 1 MPa. Ten secondary … to 17 MPa were compared to the 7 MPa gauges. Distortion in the 7 MPa piston gauges was determined by comparing those …

yocto-Newton force detection sensitivity using trapped ions

August 22, 2010
Author(s)
Michael J. Biercuk, Joseph W. Britton, Hermann Uys, Aaron Vandevender, John Bollinger
… backaction and for the development of a new technology base founded on the capability of detecting extremely small external forces. In a host of formats trapped atomic ions have been proposed … for the detection of small forces, including applications in materials science. Using small crystals of 9 Be + in a …

Manipulation of the elastic modulus of polymers at the nanoscale: Influence of UV-ozone crosslinking and plasticizer

August 16, 2010
Author(s)
Jessica M. Torres, Christopher Stafford, Bryan D. Vogt
… is the elastic modulus. However, a significant reduction in modulus has been reported for thin films and … scale. Routes to mitigate or even eliminate this reduction in modulus, and thus enhancing the mechanically stability of … of thickness. However, UVO cannot eliminate the decrease in modulus of low molecular mass PS or PMMA due to limited …

A Second-Generation NIST Gravimetric Hygrometer

April 1, 2010
Author(s)
Christopher W. Meyer, Joseph T. Hodges, Gregory E. Scace, James R. Whetstone, R W. Hyland
… been completed at the National Institute of Standards and Technology (NIST). A gravimetric hygrometer measures humidity … by the previous NIST gravimetric hygrometer. When operated in an optimal thermal environment (minimal thermal loads in the laboratory), the total expanded relative uncertainty …

The Limits and Extensibility of Optical Patterned Defect Inspection

April 1, 2010
Author(s)
Richard M. Silver, Bryan M. Barnes, Martin Y. Sohn, Richard Quintanilha, Hui Zhou, Chris Deeb, Mark Johnson, Milton Goodwin, Dilip Patel
… developed at the National Institute of Standards and Technology using bright field optical tools are applied to … of angle and analysis of the entire scattered field. In this paper we demonstrate advantages using this approach … scatterfield optical microscopy (SOM), has been evaluated in this paper for applications in defect inspection on a …

Methods for TEM analysis of NISTs SWCNT SRM

March 25, 2010
Author(s)
Roy H. Geiss, Elisabeth Mansfield, Jeffrey A. Fagan
… The National Institute of Standards and Technology (NIST) is developing a series of single-walled … paper sample, which will be certified for composition. In the third material, raw soot will be taken through a … infrared and fluorescence spectroscopy. TEM is used in the analysis of SWCNT as a qualitative technique which …

Standard Reference Data for the Thermophysical Properties of Biofuels

March 25, 2010
Author(s)
Mark O. McLinden, Thomas J. Bruno, Michael D. Frenkel, Marcia L. Huber
… are required for the efficient design of every step in their production, distribution, and utilization. We … research at the National Institute of Standards and Technology (NIST). We are expanding two Standard Reference … on thermodynamic and transport models. The property models in the databases implement an equation of state approach …

Quantification of the Binding Affinity of a Specific Hydroxyapatite Binding Peptide

January 27, 2010
Author(s)
Michael C. Weiger, Jung Jin Park, Marc D. Roy, Christopher M. Stafford, Alamgir Karim, Matthew L. Becker
… or even inhibit HA mineralization. Using phage display technology, a short peptide was identified that binds to … to this interaction require further investigation. In this study, we employ a microfluidic chip based surface … peptides affinity but by itself shows little specificity in the current context. These data show that together, the …

Characterization of Noise Properties in Photodetectors: A Step Toward Ultra-Low Noise Microwaves

November 16, 2009
Author(s)
Jennifer A. Taylor, Franklyn J. Quinlan, Scott A. Diddams
… systems. However, even state-of-the-art rf oscillator technology for producing signals into the tens of gigahertz … and divide the signal down into the microwave region. In order to convert optical pulses into a usable rf signal, … from both technical and fundamental sources can arise in the photodetection process. In order to ultimately …

Towards portable vacuum standards

August 1, 2009
Author(s)
Jay H. Hendricks, Douglas A. Olson
… The problem with making reliable pressure measurements in modern research and industrial processes, which can range … use or incorrect calibration of any of these can result in unreliable measurements that cost time and money. It is … such as the National Institute of Standards and Technology (NIST) in the US and other national metrology …

The 2008 NCSLi Josephson Voltage Standards Interlaboratory Comparison

July 1, 2009
Author(s)
Harold V. Parks, William B. Miller, Leonard P. Pardo, Curtis Kiser, Clark A. Hamilton, Yi-hua D. Tang, Barry M. Wood
… between March and July 2008 with 14 participating labs in North America. It began with a direct array to array … comparison between the National Institute of Standards and Technology (NIST) compact Josephson voltage standard (CJVS) … the system at the pivot lab at Lockheed Mission Services in Denver. The two systems agreed to well within the k = 2 …

Common Biometric Exchange Formats Framework Standardization

February 13, 2009
Author(s)
Fernando L. Podio, Fred Herr
… procedures that support the interchange of biometric data in standard data structures called CBEFF biometric … BIR structures and biometric data content, but does so in a way that makes it easy for biometric applications to … were developed by the National Institute of Standards and Technology (NIST) and the Biometric Consortium. The CBEFF …

Measurement of Axisymmetric Crystallographic Texture

January 1, 2009
Author(s)
Mark D. Vaudin
… past two decades, the importance and relevance of texture in a variety of materials systems and applications has become … anisotropic properties and where texture can be induced in layers as thin as a few nanometers, have required that … to characterize it. The textures that occur naturally in thin films are almost invariably of axial symmetry (also …

Building Networks and Public Safety Communications

November 18, 2008
Author(s)
David G. Holmberg, Stephen J. Treado, William D. Davis, Steven T. Bushby, Alan B. Vinh, Michael A. Galler, R Vettori
… and (3) a workshop that addresses current “what works” for in-building radio communications. Radio coverage for emergency response in buildings is frequently problematic due to the shielding … communications. Results show that building information technology (IT) and fire networks could potentially be used …
Displaying 12476 - 12500 of 13226
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