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Displaying 49126 - 49150 of 74303

Size Change of Dendrimers in Concentrated Solution

December 1, 1999
Author(s)
A Topp, Barry J. Bauer, T J. Prosa, R L. Scherrenberg, Eric J. Amis
Solutions of the poly(propylene imine) dendrimers DAB-dendr-(NH 2) 23 and DAB-dendr-(NH 2) 64 in methanol are investigated with small angle neutron scattering over the range of dendrimer mass fraction 0.01# x # 0.80. The single particle scattering function

Study of Ethylene-Propylene Copolymer Thermoreversible Gels

December 1, 1999
Author(s)
C Daniel, T C. Jao, Barry J. Bauer, Eric J. Amis
Molecular structure and rheological properties of ethylene-propylene (EP) random copolymer gels formed in toluene and methylcyclohexane, respectively, have been investigated by small angle neutron scattering (SANS) and oscillatory shear. In both solvents

Temporal, Matter-Wave Dispersion Talbot Effect

December 1, 1999
Author(s)
Lu Deng, Edward W. Hagley, J Denschlag, J E. Simsarian, M Edwards, Charles W. Clark, Kristian Helmerson, S L. Rolston, William D. Phillips
We analyze and experimentally demonstrate a new (temporal) Talbot effect, where a pulsed phase grating is applied to a cloud of cold atoms (Bose-Einstein condensate). In contrast to the usual (spatial) Talbot effect, our atoms gain kinetic energy when

The International Standards System and NDE

December 1, 1999
Author(s)
Thomas A. Siewert
The globalization of manufacturing and construction markets is broadening the range of inspection standards that might be specified for a product, and we should prepare by learning more about the various organizations that develop such standards. The paper

The Theory of Bose-Einstein Condensation of Dilute Gases

December 1, 1999
Author(s)
Karen G. Burnett, M Edwards, Charles W. Clark
In this article, we present a current perspective on advances in the theoretical understanding of Bose-Einstein condensation from the standpoint of atomic, molecular and optical (AMO) physics. In AMO physics, BEC has come to be perceived both as an
Displaying 49126 - 49150 of 74303