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Displaying 1526 - 1550 of 2521

Steady-state and time-resolved photoluminescence from relaxed and strained GaN nanowires grown by catalyst-free molecular-beam epitaxy

June 24, 2008

Author(s)

John B. Schlager, Kristine A. Bertness, Paul T. Blanchard, Lawrence H. Robins, Alexana Roshko, Norman A. Sanford

… (TRPL) measurements on individual GaN nanowires (6-20 micrometers in length, 30-940 nm in diameter) grown by …

Enthalpy of Solution and Kovats Retention Indices for Nitroaromatic Compounds on Stationary Phases Using Gas Chromatography

June 1, 2008

Author(s)

Jeffrey Caulfield, Thomas J. Bruno, Keith E. Miller

… phases (by mass composition), namely, 80 % dimethyl + 20 % diphenyl polysiloxane, 14 % cyanopropylphenyl + 86 % …

Raman Spectroscopic Determination of Hole Concentration in p-Type GaSb

January 2, 2008

Author(s)

James E. Maslar, Wilbur S. Hurst, C Wang

… that were corrected to account for two band conduction by ~20% to ~65%. These deviations were attributed to the …

Quantum Tomography of a Bright, Polarization-Entangled Photon Pair Source Based on a Fiber Sagnac Interferometer

September 16, 2007

Author(s)

Jingyun Fan, M D. Eisaman, Alan L. Migdall

… Bell states with a detected two-photon coincidence rate of 7 kHz per bandwidth of 0.9 nm in a spectral range of more than 20 nm. To characterize the purity of the states produced by …

A Virtual Rapid Chloride Permeability Test

July 15, 2007

Author(s)

Dale P. Bentz

… as it is commonly called, has been in existence for over 20 years and was standardized by ASTM over 15 years ago. The …

Analysis of Pipeline Steel Corrosion Data

May 2, 2007

Author(s)

Richard E. Ricker

… Currently, the U.S. has over 3.7 million kilometers (2.3 million miles) of pipelines … the point of consumption and pipelines account for about 20% of the total mass-distance that oil and natural gas are …

Injectable and Macroporous Calcium Phosphate Cement Scaffold

August 1, 2006

Author(s)

Hockin D. Xu, Michael Weir, Elena F. Burguera, A M. Fraser

… with the CPC powder at mannitol mass fractions of 0 %, 20 %, 30 %, 40 % and 50 %. The cement liquid contained sodium …

A Ribose Sugar Conformational Switch in the LTR-Retrotransposon Ty3 Polypurine Tract-Containing RNA/DNA Hybrid

November 30, 2005

Author(s)

Hye Y. Yi-Brunozzi, D M. Brabazon, Daniela Lener, Stuart F. LeGrice, John Marino

To probe structural features of a polypurine-tract (PPT) that mediate its specific recognition and processing, a model 20bp RNA/DNA duplex, which includes the full PPT sequence of the saccharomyces cerevisiae LTR-retrotransposon Ty3, has been investigated

Carbon nanotube coated thermal detectors

November 14, 2005

Author(s)

John H. Lehman

… (> 99 %) over a broad range of wavelengths (0.2 ?m to 20 ?m). We present investigations of the optical absorption …

Effect of Off-Axis Concentrated Loading on Failure of Curved Brittle Layer Structures

August 1, 2005

Author(s)

T Qasim, M T. Bush, X Z. Hu, Brian R. Lawn

… thick onto steel spherical dies with radius of curvature 20 mm to 8 mm at elevated temperatures, and bonding the …

Creating Standard Reference Materials for Testing Declarable Substances in Materials.

June 1, 2005

Author(s)

John R. Sieber

As ASTM International Committee F40 on Declarable Substances in Materials begins its work, ASTM wants to inform all members and stakeholders of the mission, goals and planned activities of the committee. I was asked to describe my role as the National

Estimates of Thermal Properties for Fire Fighters' Protective Clothing Materials (NISTIR 7282)

June 1, 2005

Author(s)

James R. Lawson, William D. Walton, Nelson P. Bryner, Francine K. Amon

… measurements were made over a range of temperatures from 20 C to 100 C. Specific heat was measured over a range of 0 C …

Manipulating Cell Adhesion on Gradient Poly(2-Hydroxyethyl Methacrylate)-Grafted Surfaces

April 1, 2005

Author(s)

Ying Mei, Tao Wu, Chang Xu, K J. Langenbach, John T. Elliott, B D. Vogt, Kathryn L. Beers, Eric J. Amis, N Washburn

… thickness was measured across the gradient, range from 20 to 100A, but we observed a non-monotonic variation in …

Control of Moisture at Buried Polymer / Alumina Interfaces Through Subtrate Surface Modification

March 15, 2005

Author(s)

B D. Vogt, Vivek M. Prabhu, Christopher L. Soles, Sushil K. Satija, Eric K. Lin, Wen-Li Wu

… film of the same thickness on SiOx for films thinner than 20 nm. This is due to comparatively less moisture …

A Thermodynamic and Time Course Study of the Lipase-Catalyzed Transesterification of Benzyl Alcohol and Butyl Acetate in Supercritical Carbon Dioxide Media

August 16, 2004

Author(s)

Yadu D. Tewari, T. Ihara, Karen W. Phinney, M P. Mayhew

… was investigated over the pressure range p= 8 MPa to p = 20 MPa at T = 303.15 K. The equilibrium constant of the above …

Volumetric Gas Flow Standard with Uncertainty of 0.02% to 0.05%

November 1, 2003

Author(s)

John D. Wright, Michael R. Moldover, Aaron N. Johnson, A Mizuno

… allows determination of the average gas temperature to 7 mK (0.0023%) within an equilibration time of 20 minutes. We developed a mass cancellation procedure that …

Monitoring Sheath Voltages and Ion Energies in High-Density Plasmas Using Noninvasive Radio-Frequency Current and Voltage Measurements

September 1, 2003

Author(s)

Mark A. Sobolewski

… (rf) substrate bias at frequencies of 0.1 MHz to 20 MHz. Plasma potential waveforms and sheath voltages …

Collision Dynamics of A Liquid Fire Suppressant Upon A Heated Wax Surface

July 18, 2003

Author(s)

Samuel L. Manzello, Jiann C. Yang

… with the temperature of the wax surface varied from 20 C to 75 C. For each impact We number, the evolution of the …

Noninvasive Detection of Weapons of Mass Destruction Using Terahertz Radiation

July 1, 2003

Author(s)

M B. Campbell, Edwin J. Heilweil

… are made up of molecules of this size. Because 0.3-20 THz light partially transmits through many common …

First High-Resolution Analyses of the N 8 and N 8 + N 9 Spectral Regions of 35 CIONO 2 : Determination of the N 9 Band Centre

May 1, 2003

Author(s)

J.- M. Flaud, Walter J. Lafferty, J Orphal, M Birk, G Wagner

… to obtain the band center of Ņ 9 : Ņ 0 (Ņ 9 ) = 123.7219(20) cm -1 . This establishes unambiguously that the band at 714.9 cm -1 previously attributed to Ņ 5 + Ņ 7 - Ņ 9 is actually the Ņ 8 + Ņ 9 -Ņ 9 hot band. …

Second Phase Evaluation of a Protocol for Testing Fire-Resistant Oil Spill Containment Boom. Volume 2 (NIST SP 995)

March 1, 2003

Author(s)

William D. Walton, W H. Twilley, Nelson P. Bryner, Laurean A. DeLauter, R. R. Hiltabrand, J. V. Mullin

… A second series of fire tests utilizing the ASTM F-20 draft, Standard Guide for In Situ Burning of Oil Spills On …

Many-Body Levels of Optically Excited and Multiple Charged InAs Nanocrystals Modeled by Semiempirical Tight Binding

December 1, 2002

Author(s)

S Lee, J Kim, P. Jonsson, J W. Wilkins, Garnett W. Bryant, G Klimeck

… energies for nanocrystals with radius larger than 20 . For the multiply charged InAs nanocrystals, polarization …

Structural Effects on the Magnetic Character of Yttrium-Iron-Garnet Nanoparticles Dispersed in Glass Composites

November 13, 2002

Author(s)

S Taketomi, Alexander J. Shapiro, Robert D. Shull

… were independently dispersed with sizes ranging from 20 nm to 40 nm in this fused shell with an average particle …

Electrophoretic Capture of Circular DNA in Gels - A Review

August 1, 2002

Author(s)

B. Akerman, Kenneth D. Cole

… that the average capture time was on the order of 10s at 20 V/cm, by which time the circles have migrated several …

Influence of Curing Conditions on Water Loss and Hydration in Cement Pastes With and Without Fly Ash Substitution

July 1, 2002

Author(s)

Dale P. Bentz

… portland cements. The blended cement contains about 20 % by mass fly ash substitution for cement. Water loss/gain …

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