267 research outputs found
Observation of dipole-dipole interaction in a degenerate quantum gas
We have investigated the expansion of a Bose-Einstein condensate (BEC) of
strongly magnetic chromium atoms. The long-range and anisotropic magnetic
dipole-dipole interaction leads to an anisotropic deformation of the expanding
Cr-BEC which depends on the orientation of the atomic dipole moments. Our
measurements are consistent with the theory of dipolar quantum gases and show
that a Cr-BEC is an excellent model system to study dipolar interactions in
such gases.Comment: 4 pages, 2 figure
Probing the Ternary Complexes of Indoleamine and Tryptophan 2,3-Dioxygenases by Cryoreduction EPR and ENDOR Spectroscopy
Thermal effects in high density polyethylene and low density polyethylene at high hydrostatic pressures
The temperature changes as a result of rapid hydrostatic pressure applications are reported for high density polyethylene (HDPE) and low density polyethylene (LDPE) in the reference temperature range from 298 to 423 K and in the pressure range from 13.8 to 200 MN m −2 . The adiabatic temperature changes were found to be a function of pressure and temperature. A curve fitting analysis showed that the empirical curve (∂/∂ P ) = ab (Δ P ) b−1 described the experimental thermoelastic coefficients obtained from the experiments. The data were analyzed by determining the predicted thermoelastic coefficients derived from the Thomson equation (∂/∂ P ) θ = α T 0 /ϱ C p . The experimental and predicted Grüneisen parameter γ T were also determined.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/44687/1/10853_2005_Article_BF01132919.pd
Local stress measurement using the thermoelastic effect
A technique for measuring local stresses in metallic specimens is proposed and tested. The technique depends on the experimental measurement of temperature changes in stressed members due to adiabatic elastic deformation. At a free boundary in a body under plane stress, these temperature changes are directly related to the value of the tangential principal stress. The technique is suited for measurement of stress-concentration effects, since the temperature changes can be measured with thermocouples featuring extremely small junctions.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43937/1/11340_2006_Article_BF02326342.pd
Das Problem in ein Postulat verwandeln: Cassirer und Einsteins Unterscheidung von konstruktiven und Prinzipien-Theorien
Brønsted Acid‐Catalyzed Asymmetric Ring‐Closing Alkylation of Inert N‐substituted Pyrroles with α, β‐Unsaturated Ketones
3-Alkyl-3-(alkylamino)indolin-2-ones via Base-Mediated C-Arylation of 2-Nitrobenzenesulfonamides
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