We have measured the dielectric relaxation of 2,2,6,6-tetramethyl-piperidine-1-oxyl (TEMPO) as a rotational probe in supercooled ortho-terphenyl (OTP). Due to the significant dipole moment of TEMPO compared with OTP, its contribution to the loss spectra can be identified already at moderate concentrations. For time scales ranging from 10 μs to 1 s, it is found that the tumbling mode of TEMPO is a true replica of the structural relaxation of OTP regarding average time constant, relaxation time dispersion, and the temperature dependence. While the present dielectric results are consistent with a decoupling of a spinning mode (about the nitroxyl dipole axis) of TEMPO from viscosity, they do not agree with the strong decoupling of the tumbling mode derived from electron spin resonance experiments.
We studied heating rate (0.5, 25, or 90 °C/min) and endpoint temperature (45 to 90 °C) effects on rheological properties (fracture, small strain) of washed myofibril gels derived from fish (Alaska pollock) compared with chicken breast at a common pH (6.75). This was contrasted with published data...
We prove that symplectic homeomorphisms, in the sense of the celebrated
Gromov-Eliashberg Theorem, preserve coisotropic submanifolds and their
Characteristic foliations. This result generalizes the Gromov-Eliashberg
Theorem and demonstrates that previous rigidity results (on Lagrangians by
We consider a binary Bose-Einstein condensate (BEC) with nonlinear repulsive
Interactions and linear spin-orbit (SO) and Zeeman-splitting couplings. In the
Presence of the trapping harmonic-oscillator (HO) potential, we report the
Existence of even, odd, and asymmetric spatial modes. They feature al...
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