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Displaying 39726 - 39750 of 74179

Quantitative Response Measurement of Cell Substrate Interactions via RT-PCR

February 1, 2004
Author(s)
Matthew Becker, L A. Bailey, Karen L. Wooley, J Kohn, Eric J. Amis, N Washburn
High-throughput metrologies for the rapid and systematic evaluation of synthetic materials, which would elucidate a candidate s potential biocompatibility, are needed. New synthetic methodologies have enabled a remarkable advance in the rational design of

Reaching Beyond Discovery

February 1, 2004
Author(s)
Eric J. Amis
Whatever you are trying to make, the choice of materials is often bewildering. Novel combinatorial approaches allow you to reduce the time and costs necessary to optimize results, while stimulating the quest for deeper fundamental knowledge.

Realization of a Quantum Random Walk With Ultracold Atoms

February 1, 2004
Author(s)
D Ciampini, M B. d'Arcy, J M. Grossman, Kristian Helmerson, Paul D. Lett, William D. Phillips, A Vaziri, S L. Rolston
Classical random walks have many applications in computer science. Quantum random walks (QRWs) [1] have been suggested as the potential basis for quantum computing algorithms. Such algorithms have been reported, some of which offer an exponential speed-up

Scattering Methods Applied to High Throughput Materials Science

February 1, 2004
Author(s)
A I. Norman, J Cabral, D L. Ho, Eric J. Amis, Alamgir Karim
Scattering methods have been employed to study the aqueous phase behavior of two low molecular weight diblock copolymers, EO(6)BO(11) and EO(18)BO(9), where EO denotes an ethyleneoxide unit and BO denotes a butyleneoxide unit. Depending on the lengths of

Semiconductor Nanocrystal Probes for Human Metaphase Chromosomes

February 1, 2004
Author(s)
Yan Xiao, Peter E. Barker
Novel inorganic fluorophores called semiconductor nanocrystals have recently been incorporated into protein, antibody and microbead oligonucleotide detection methods where previously, organic dyes were universally employed. To improve quantitation of

Significant Parameters in the Optimization of MALDI-TOF-MS

February 1, 2004
Author(s)
S Wetzel, Kathleen M. Flynn, James J. Filliben
One of the most significant issues in any analytical technique is optimization. Optimization and calibration are key factors in quantitation. In matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS), one of the

Soft X-Ray Absorption Spectroscopic Study of a LiNi 0.5 Mn 0.5 O 2 Cathode During Charge

February 1, 2004
Author(s)
W S. Yoon, Mahalingam Balasubramanian, Xiao-Qing Yang, Ziwen Fu, Daniel A. Fischer, James McBreen
Soft X-ray (200 eV to 1000 eV) absorption spectroscopy (XAS) at the O K-edge and the metal L II, III-edges, in both the fluorescence yield (FY) and the partial electron yield (PEY) mode, has been used to probe the electronic structure of electrochemically

Standards for Security Categorization of Federal Information and Information Systems

February 1, 2004
Author(s)
National Institute of Standards and Technology (NIST), Ronald S. Ross, Marianne M. Swanson
The purpose of this document is to provide a standard for categorizing federal information and information systems according to an agency's level of concern for confidentiality, integrity, and availability and the potential impact on agency assets and

Strength of Silicon Containing Nanoscale Flaws

February 1, 2004
Author(s)
Antonia Pajares, Michael Chumakov, Brian R. Lawn
A study was made of the strength of highly polished silicon surfaces after nanoindentation with a Berkovich diamond. Strengths of the indented surfaces were measured as a function of flaw size, quantified by indenter penetration. Analogous data from etched

Superfluid Atomic Fermi Gas With a Vortex

February 1, 2004
Author(s)
N Nygaard, G M. Bruun, B I. Schneider, D L. Feder, Charles W. Clark
Dilute atomic gases have become a powerful tool for studying many-body quantum mechanics. The best example of this is the achievement of Bose-Einstein condensation in 1995 in a gas of Bose atoms, a discovery which has invoked a confluence of ideas from

Superfluid-to-Mott-Insulating Transition in a One-Dimensional Atomic Gas

February 1, 2004
Author(s)
C Fertig, K M. O'Hara, J H. Huckans, James V. Porto, William D. Phillips
Over the past two decades, the Mott-insulating phase transition has received a great deal of attention as a prototypical example of a quantum phase transition in a strongly-correlated system for which quantum fluctuations drive the phase transition at zero

Surface Effects in Chemically Amplified Photoresists: Environmental Stability and Segregation

February 1, 2004
Author(s)
E Jablonski, Vivek M. Prabhu, S Sambasivan, Daniel A. Fischer, Eric K. Lin, D L. Goldfarb, M Angelopoulos, H Ito
It is well known that chemically amplified photoresists are sensitive to certain airborne molecular contaminants, notably amines, during post exposure delay, although the actual cause and specific failure mechanism are unknown. To assess the effect of low

Surface Enhanced Raman Spectroscopy in a Microfluidic Device

February 1, 2004
Author(s)
D Dunmire, D B. Romero, Guangjun Cheng, Angela R. Hight Walker
Surface enhanced Raman spectroscopy (SERS) is employed to study the solution phase vibrational structure of molecules on gold and silver colloids. Gold and silver colloids show large enhancement factors enabling sub-micromolar detection limits. Using a

Synthesis of Bioconjugated Magnetic Nanoparticles for Magneto-Raman Study

February 1, 2004
Author(s)
Guangjun Cheng, D B. Romero, D Dunmire, Angela R. Hight Walker
We are investigating the effects of an externally applied magnetic field on the structure and magnetic properties of biomolecules (DNA and proteins). A newly constructed, magneto-Raman confocal microscope system couples a cryo-magnet to a triple grating

Techniques for Measurements in Concentrated Systems

February 1, 2004
Author(s)
Vincent A. Hackley
Concentrated suspensions present a number of technical challenges for characterization and monitoring of the solid phase. Recent developments have provided the means to analyze many concentrated systems directly or at solids loadings more closely
Displaying 39726 - 39750 of 74179
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