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Journals

The Influence of Mineral Admixtures on the Rheology of Cement Paste and Concrete

February 1, 2001

Author(s)

Chiara F. Ferraris, K H. Obla, R Hill

Rheological tests on cement paste were used to successfully select the type and dosage of mineral admixtures that improved concrete workability. Among the six...

Genotyping of Two Mutations in the HFE Gene Using Single-Base Extension and High-Performance Liquid Chromatography

February 1, 2001

Author(s)

J. M. Devaney, E. L. Pettit, S. G. Kaler, Peter M. Vallone, John M. Butler, M. A. Marino

Nonequilibrium Theory of Scanning Tunneling Spectroscopy via Adsorbate Resonances: Nonmagnetic and Kondo Impurities

February 1, 2001

Author(s)

M Plihal, John William Gadzuk

We report on a fully nonequilibrium theory of the scanning tunneling microscopy (STM) through resonances induced by impurity atoms adsorbed on metal surfaces...

Surface Oxidation as a Diffusion Barrier for Aluminum Deposited on Ferromagnetic Metals

February 1, 2001

Author(s)

William F. Egelhoff Jr., P. J. Chen, Robert D. McMichael, Cedric J. Powell, R Deslattes, F. G. Serpa, Romel D. Gomez

Laminar Flow of Four Gases Through a Helical Rectangular Duct

February 1, 2001

Author(s)

Robert F. Berg, S A. Tison

We report measurements and a model of gas flow through a helical duct of rectangular cross section. The measurements on helium, nitrogen, argon, and sulfur...

How Interoperability Saves Money

February 1, 2001

Author(s)

Robert E. Chapman

The pressures of competing in the global marketplace are forcing building control companies, equipment and systems manufacturers, energy providers, utiliites...

Development of a Procedure for Measuring Nitrogen by Cold Neutron Prompt Gamma-ray Activation Analysis

February 1, 2001

Author(s)

Rick L. Paul

Capillary Electrophoresis as a Tool for Optimization of Multiplex PCR Reactions

February 1, 2001

Author(s)

John M. Butler, C M. Ruitberg, Peter M. Vallone

Copying multiple regions of a DNA molecule is routinely performed today using the polymerase chain reaction (PCR) in a process commonly referred to as multiplex...

Application of the Hilbert-Huang Transform to Machine Tool Condition/Health Monitoring

February 1, 2001

Author(s)

Gary G. Leisk, Nelson N. Hsu, N E. Huang

Machine tools generate significant vibration levels during operation due to the dynamic nature of the machine and cutting process. With appropriate vibration...

Fiber Optic Flow and Cure Sensing for Liquid Composite Molding

February 1, 2001

Author(s)

Joy P. Dunkers, Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, S R. Kueh, J H. VanZanten, S G. Advani, Richard~undefined~undefined~undefined~undefined~undefined Parnas

The Polymer Composites group at the National Institute of Standards and Technology has efforts in both on-line flow and cure sensing for liquid composite...

Solubility of Calcium Phosphates

February 1, 2001

Author(s)

Laurence C. Chow

Solubility is one of the most important properties of calcium phosphate salts. It is the solubility that determines the direction of many reactions that involve...

Morphological and Phase Characterizations of Retrieved Calcium Phosphate Cement Implants

February 1, 2001

Author(s)

Shozo Takagi, Laurence C. Chow, Milenko Markovic, C D. Friedman, P D. Costantino

A self-hardening calcium phosphate cement (CPC), consisting of equimolar amounts of tetracalcium phosphate and dicalcium phosphate anhydrous, hardens when mixed...

String Formation in Sheared Polymer Blends: Coalescence, Breakup and Finite Size Effects

February 1, 2001

Author(s)

Kalman D. Migler

We have discovered a droplet-string transition in concentrated polymer blends which occurs when the size of a dispersed droplet becomes comparable to the gap...

Formation of Macropores in Calcium Phosphate Cement Implants

February 1, 2001

Author(s)

Shozo Takagi, Laurence C. Chow

A calcium phosphate cement (CPC) was shown to harden at ambient temperatures and form hydroxyapatite as the only end-product. Animal study results showed showed...

Sheet Metal Formability Studies at the National Institute of Standards and Technology

February 1, 2001

Author(s)

Timothy J. Foecke, Stephen W. Banovic, Richard J. Fields

Sheet metal forming is a multi $10-billion industry in the United States, with an overwhelming portion of its use in the automotive industry as formed sheet...

NIST Workshop on Reference Data for the Properties of Biomaterials

February 1, 2001

Author(s)

John A. Tesk

The needs for reference data on properties of biomaterials were identified at a workshop held at the National Institute of Standards and Technology (NIST) on...

Phase-Coherent Multilevel Two-Photon Transitions in Cold Rb Atoms: Ultrahigh-Resolution Spectroscopy Via Frequency-Stabilized

February 1, 2001

Author(s)

T H. Yoon, A Marian, J L. Hall, J Ye

A two-photon transition in cold Rb atoms will be probed with a phase-coherent wide bandwidth femtosecond laser comb. Frequency domain analysis yeilds a high...

Conical Emission by 2-PS Excitation of Potassium Vapor

February 1, 2001

Author(s)

D Sarkisyan, B D. Paul, S T. Cundiff, E A. Gibson, Alan Gallagher

Conical emission, redshifted from the atomic resonance, is observed when a ~2ps laser beam, blueshifted from resonance, propagates through potassium vapor. In...

Radiometry: Sensing the World

February 1, 2001

Author(s)

Steven W. Brown, Bettye C. Johnson, Keith R. Lykke

Light is the supreme messenger. Light tells us something about the cosmos, the make-up of our bodies, and nearly everything in between. Light carries structural...

Environment-Induced Modification of Spontaneous Emission: Single-Molecule Near-Field Probe

February 1, 2001

Author(s)

A Rahmani, P C. Chaumet, F de Fornel

The modification of lifetime experienced by a fluorescent molecule placed in an arbitrary environment is investigated theoretically within the framework of...

Two Dimensional Phase Diagram of Decanethiol on Au(111)

February 1, 2001

Author(s)

G Poirier, W P. Fitts, J M. White

sed on variable temperature ultrahigh vacuum scanning tunneling microscopy data, we propose a two dimensional phase diagram of monolayerdecanethiol on Au(111)...

Pulsed-Laser Metrology at NIST

February 1, 2001

Author(s)

Marla L. Dowell

Pulsed-Laser Metrology at NIST

February 1, 2001

Author(s)

Marla L. Dowell

Lasers and laser metrology have become an important part of our daily lives. Since the inception of the first operable laser 41 years ago, there has been...

Developing and Mining Materials Databases With Corrosion and Fatigue Data

February 1, 2001

Author(s)

C P. Sturrock

The development and mining of materials databases are described, with examples based on data from metals fatigue and corrosion experiments. Much of the research...

When Worlds Collide - Interactions Between the Virtual and the Real

February 1, 2001

Author(s)

Sanford P. Ressler, Brian Antonishek, Quandou (. Wang, Afzal A. Godil, Keith A. Stouffer

This paper explores issues surrounding interaction with virtual (computer generated) objects which are interfaced to real world devices. In addition a virtual...

Influence of Counterion Valency on the Scattering Properties of Highly Charged Polyelectrolyte Solutions

February 1, 2001

Author(s)

Y B. Zhang, Jack F. Douglas, B D. Ermi, Eric J. Amis

Light and neutron scattering measurements on highly charged polyelectrolyte solutions have recently provided firm evidence for the existence of domain...

The Ground and First Excited Torsional States of Acetic Acid

February 1, 2001

Author(s)

Vadim V. Ilyushin, E A. Alekseev, S K. Dyubko, S V. Podnos, I Kleiner, L Margules, G Wlodarczak, J Demaison, J Cosleou, B Mate, E N. Karyakin, G Y. Golubiatnikow, Gerald T. Fraser, R D. Suenram, Jon T. Hougen

A global fit of microwave and millimeter wave rotational transitions in the ground and first excited torsional states (vt = 0 and 1) of acetic acid (CH3COOH) is...

Addition-Insertion-Elimination Reactions of O(³P) With Halogenated Iodoalkanes Producing HF(v) and HCI(v)

February 1, 2001

Author(s)

T P. Marcy, J P. Reid, C X. Qian, S R. Leone

The reaction of CH 2ICF 3 and other fluorinated or chlorinated iodoalkanes with O( 3 P), generated by microwave discharge of O 2 or 193 nm photolysis of SO 2...

Pattern Characterization of Deep-Ultraviolet Photoresists by Near-Field Infrared Microscopy

February 1, 2001

Author(s)

B Dragnea, J Preusser, S R. Szarko, S R. Leone, W D. Hinsberg

Chemical contrast at subwavelength spatial resolution (λ/10) is achieved using a fiber-based, infrared near-field microscope, at 3 m wavelength. Chemically...

Manganese(III) Biliverdin IX Dimethyl Ester: A Powerful Catalytic Scavenger of Superoxide Employing the Mn(III)/Mn(IV) Redox Couple

February 1, 2001

Author(s)

I Spasojevic, I Batinic-Haberle, R D. Stevens, P Hambright, A N. Thorpe, J Grodkowski, Pedatsur Neta, I Fridovich

A manganese(III) complex of biliverdin IX dimethyl ester, Mn IIIBVDME} 2 was prepared and characterized by elemental analysis, uv/vis spectroscopy, cyclic...

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