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Displaying 52051 - 52075 of 74459

Effect of Powder Grinding on Hydroxyapatite Formation in a Polymeric Calcium Phosphate Cement Prepared from Tetracalcium Phosphate and Poly[Methyl Vinyl Ether-Maleic Acid]

November 1, 1998
Author(s)
Y Matsuya, S Matsuya, Joseph M. Antonucci, S. Takagi, Laurence C. Chow, A Akamine
The primary aim of this study was to determine if cement based on poly(methyl vinyl ether-maleic acid) (PMVE-Ma) and tetracalcium phosphate (TTCP) resulted in hydroxyapatite (OHAp) formation. In addition, the mechanical strength of this type of polymeric

Effect of Temperature on Electron Attachment to and Negative Ion States of CCl 2 F 2

November 1, 1998
Author(s)
Yicheng Wang, Loucas G. Christophorou, J. K. Verbrugge
The effect of temperature on electron attachment to dichlorodifluoromethane (CCl 2F 2) has been investigated for temperatures up to 500 K and for mean electron energies from thermal to 1.0 eV using an electron swarm method. The measurements were made in

Elastic-Strain Tensor by Rietveld Refinement of Diffraction Measurements

November 1, 1998
Author(s)
Davor Balzar, R B. Voneele, K Bennett, H M. Ledbetter
By collecting diffraction patterns at different specimen orientations, the procedure to obtain all components of the elastic-strain tensor by Rietveld refinement is described. It is shown that the refined lattice parameters yield the hydrostatic strain

Equilibrium Structure of Hydrogen-Bonded Polymer Blends

November 1, 1998
Author(s)
C Zhou, Erik K. Hobbie, Barry J. Bauer, Charles C. Han
Deuterium-labeled polystyrene modified by random distributions of the comonomer p-(1,1,1,3,3,3-hexaflouro-2-hydroxyisopropyl)-α-Methyl-styrene [DPS(OH)] has been blended with poly (butyl methacrylate) (PBMA) and studied with small-angle neutron scattering

Evaluation of the External Force Term in the Discrete Boltzmann Equation

November 1, 1998
Author(s)
Nicos Martys, X Shan, H Chen
A representation of the forcing term in the Boltzmann equation based on Hermite expansion of the Boltzmann distribution function in velocity phase space is derived. Based on this description of the forcing term, a systematic comparison of previous Lattice

Micromachined Silicon Torsional Resonator for Magnetic Anisotropy Measurement

November 1, 1998
Author(s)
J. Morillo, Q. Su, B. Panchapakesan, Matthias Wuttig, Donald B. Novotny
A novel method for measuring the out-of-plane magnetic anisotropy of thin films has been developed using the existing techniques of silicon micromachining. The torsion pendulum which is commonly used to measure the perpendicular magnetic anisotropy energy

Morphology of Polyethylene-Carbon Black Composites

November 1, 1998
Author(s)
G Beaucage, Daniel A. Fischer, Gabrielle G. Long, S Rane, D W. Schaefer
Carbon black is a common polymer additive that is used for reforcement and for its ability to enhance physical properties such as conductivity. This paper pertains to a small-angle x-ray scattering [SAXS] study of a conductive grade of carbon black and

NIST Atomic Spectra Database (1998)

November 1, 1998
Author(s)
G R. Dalton, Robert A. Dragoset, Jeffrey R. Fuhr, Daniel E. Kelleher, Svetlana A. Kotochigova, William C. Martin, Peter Mohr, Arlene Musgrove, Karen J. Olsen, Larissa Podobedova, Edward B. Saloman, J Sugar, Wolfgang L. Wiese, C S. Grant, G Eichhorn, Richard L. Kelly, T Shirai, V I. Azarov, Alexander Kramida, A N. Ryabtsev, J Blaise, J-F Wyart

Performance of a Commerical Hot Water Boiler

November 1, 1998
Author(s)
Cheol D. Park, S T. Liu
In responding to ASHRAE SPC 155P's interest and to provide additional evidence on the envisioned linear relationship between output and input of a boiler under part load conditions, the National Institute of Standards and Technology undertook to conduct a
Displaying 52051 - 52075 of 74459
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