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Journals

Trace Element Detection at Nanometer Scale Spatial Resolution

September 1, 1998

Author(s)

Dale E. Newbury

Trace elemental constituents present in materials at concentration levels below 0.01 mass fraction can exert significant control on important electronic...

Thermodynamics of the Lipase Catalyzed Esterification of 1-Dodecanoic Acid and 1-Dodecanol in Organic Solvents

September 1, 1998

Author(s)

Yadu D. Tewari

Lipase immobilized on controlled-pore glass beads was used to catalyze the esterification of 1-dodecanol and 1-dodecanoic acid in organic solvents. Equilibrium...

Electroacoustic Analysis in Processing of Advanced Ceramics

September 1, 1998

Author(s)

Vincent A. Hackley, U Paik

Finely dispersed systems such as emulsions and colloidal suspensions are recognized as playing a critical role in many important industrial processes. Many of...

Isopiestic Investigation of the Osmotic and Activity Coefficients of Aqueous MgSO₄ and the Solubility of MgSO₄X7H₂O(cr) at 298.15K: Thermodynamic Properties of the MgSO₄ + H₂O System

September 1, 1998

Author(s)

Donald G. Archer, J A. Rard

Isopiestic determinations of the osmotic coefficient of MgSO 4(aq) against NaCl(aq) and Kcl(aq) reference standards were performed with long equilibration times...

Scaling the Near-Field Centerline Mixing Behavior of Axisymmetric Turbulent Jets

September 1, 1998

Author(s)

G Papadopoulos, William M. Pitts

Detailed measurements of the centerline mixing behavior in the near field of varible-density jets were performed. Real-time measurements of jet fluid...

Effect of Heating Rate and Grain Size on the Melting Behavior of the Alloy Nb-47 Mass% Ti in Pulse-Heating Experiments

September 1, 1998

Author(s)

D Basak, William J. Boettinger, Daniel Josell, Sam R. Coriell, J L. McClure, Sitaraman Krishnan, A Cezairliyan

The effect of heating rate and grain size on the melting behavior of Nb-47 mass % Ti is measured and modeled. The experimental method uses rapid resistive self...

Electrodeposition of Copper and Copper-Aluminum Alloys From a Room-Temperature Chloroaluminate Molten Salt

September 1, 1998

Author(s)

B J. Tierney, W R. Pitner, J A. Mitchell, C L. Hussey, Gery R. Stafford

The electrodeposition of copper and copper-aluminum alloys was investigated in the Lewis acidic aluminum chloride-1-methyl-3-ethylimidazolium chloride [60.0-40...

An Accurate Measurement of the Planck Constant

September 1, 1998

Author(s)

Edwin R. Williams, Richard L. Steiner, David B. Newell

Simulations of the Thermal Conductivity in the Vicinity of the Critical Point

September 1, 1998

Author(s)

D J. Searles, D J. Evans, Howard J. Hanley, S Murad

Isothermal-isobaric nonequilibrium molecular dynamics and Green-Kubo simulations are developed and used to calculate the thermal conductivity of an 864 particle...

Parametric Analysis of the Propagation of Uncertainties in Sorption Measurements Made with a Pressure-Decay Apparatus

September 1, 1998

Author(s)

J Tighe, J J. Pellegrino

Solute Trapping and Solute Drag in a Phase-Field Model of Rapid Solidification

September 1, 1998

Author(s)

N A. Ahmad, A A. Wheeler, William J. Boettinger, Geoffrey B. McFadden

During rapid solidification, solute may be incorporated into the solid phase at a concentration significantly different than that predicted by equilibrium...

Contact Damage and Strength Degradation in Brittle/Quasi-Plastic Silicon Nitride Bilayers

September 1, 1998

Author(s)

K S. Lee, S K. Lee, Brian R. Lawn, D H. Kim

A study is made of the damage resistance of silicon nitride bilayer consisting of a hard overlayer [coating] on a soft underlayer [substrate]. The two layers...

Experimental Investigation of the Initial-State Alignment Dependence in the Energy Pooling Process: Ca(4s4p³P₁)+Ca(4s4p³P₁)-->Ca(4s4p¹P₁)+Ca(4s²)

September 1, 1998

Author(s)

Harold V. Parks, E M. Spain, J E. Smedley, S R. Leone

A pulsed laser investigation is performed to study the detailed efforts of electronic angular momentum alignment on the cross section for the energy transfer...

Energetics and Ultrafast Ring Closure Dynamics of Cyclopentadienyl Manganese Tricarboyl Derivatives

September 1, 1998

Author(s)

T Jiao, Zhiyu Pang, Theodore J. Burkey, R F. Johnston, T Heimer, V D. Kleiman, Edwin J. Heilweil

Ring closures following flash photolysis in alkane solvents has been detected for several complexes in the series η 5-C 5H 4R)Mn(CO) 3 where R = COCH 3 (1)...

High Level Computational Study of the Stereoelectronic Effects of Substituents on Alkene Epoxidations with Peroxyformic Acid

September 1, 1998

Author(s)

R D. Bach, M N. Glukhovtsev, Carlos A. Gonzalez

The epoxidations of propene and isobutene with peroxyformic acid proceed in a concerted way via Markovnikov-type slightly unsymmetrical transition structures...

Exploration of the Structural Environment of the Iron-Sulfur Cluster in Putidaredoxin by Nitrogen-15 NMR Spectroscopy of Selectively Labeled Cysteine Residues

August 28, 1998

Author(s)

Fahriye N. Sari, Marcia J. Holden, M P. Mayhew, V L. Vilker, B Coxon

Putidaredoxin is a di-iron protein whose paramagnetic region is not well characterized by 1H detected NMR. We have studied the structure of this region in...

Diffraction Anomalous Fine Structure Study of Strained GA_1-xIn_xAs on GaAs(001)

August 20, 1998

Author(s)

Joseph C. Woicik, J O. Cross, Charles E. Bouldin, Bruce D. Ravel, J G. Pellegrino, B W. Steiner, S G. Bompadre, L B. Sorensen, K E. Miyano, J P. Kirkland

Diffraction anomalous fine-structure measurements performed at both the Ga and As K edges have determined the Ga-As bond length to be 2.442 ± 0.005 {Angstrom}...

Mode-Field Diameter of Single-Mode Optical Fiber by Far-Field Scanning

August 20, 1998

Author(s)

M. Young

Elastic and Inelastic Collisions of Cold Spin-Polarized ¹³³ Cs Atoms

August 17, 1998

Author(s)

P J. Leo, Eite Tiesinga, Paul S. Julienne, T G. Walker

We present theoretical calculations of thermally averaged elastic cross sections and spin relaxation rates in the temperature range 1 {micro}K to 300 {micro}K...

Bond-Length Strain in Buried Ga_1-xIn_xAs Thin-Alloy Films Grown Coherently on InP(001)

August 16, 1998

Author(s)

Joseph C. Woicik, J A. Gupta, S P. Watkins, E D. Crozier

The bond-length strain in a series of strained, buried Ga 1-xIn xAs thin-alloy films grown coherently on InP(001) has been determined by high-resolution...

Conformational Changes in the Crystal Structure of Rat Glutathione Transferase M1-1 with Global Substitution of 3-Fluorotyrosine for Tyrosine

August 14, 1998

Author(s)

G Xiao, J F. Parsons, K Tesh, R N. Armstrong, G L. Gilliland

The structure of the tetradeca-(3-fluorotyrosyl) M1-1 GSH transferase (3-Ftyr GSH transferase), a protein in which tyrosine residues are globally substituted by...

Comparison of SFE and Soxhlet Extraction for the Determination of PCBs in Environmental Matrix Standard Reference Materials

August 14, 1998

Author(s)

Michele M. Schantz, S. Bowadt, Bruce A. Benner Jr, Stephen A. Wise, S. B. Hawthorne

Neural Network-Based Systems for Handprint OCR Applications

August 10, 1998

Author(s)

Michael D. Garris, Charles L. Wilson, J L. Blue

The Stability of Retinol, α-Tocopherol, trans-Lycopene, and trans-β-Carotene in Liquid-Frozen and Lyophilized Serum

August 10, 1998

Author(s)

Jeanice M. Brown Thomas, David L. Duewer, Margaret C. Kline, Katherine E. Sharpless

Determination of the Conformations of cAMP Receptor Protein and Its T127L/S128A Mutant with and without cAMP from Small Angle Neutron Scattering Measurements

August 7, 1998

Author(s)

Susan Krueger, I Gorshkova, J W. Brown, J Hoskins, K H. McKenney, Frederick P. Schwarz

Small angle scattering measurements were performed on solutions of cAMP receptor protein (CRP) and on solutions of the T127->A double mutant of CRP (DM) in D 2O...

On the Redefinition of the Kilogram

August 6, 1998

Author(s)

B N. Taylor, Peter Mohr

A new definition of the kilogram based on the Einstein relations E = mc^2 and E = hv is proposed, motivated by the recent progress at the National Institute of...