1,786 research outputs found
Change in blood glucose level in rats after immobilization
Experiments were carried out on male white rats divided into four groups. In group one the blood glucose level was determined immediately after immobilization. In the other three groups, two hours following immobilization, the blood glucose level was determined every 20 minutes for 3 hours 40 minutes by the glucose oxidase method. Preliminary immobilization for 2 hours removed the increase in the blood glucose caused by the stress reaction. By the 2nd hour of immobilization in the presence of continuing stress, the blood glucose level stabilized and varied within 42 + or - 5.5 and 47 + or - 8.1 mg %. Within 2 hours after the immobilization, the differences in the blood glucose level of the rats from the control groups were statistically insignificant
Identification of magnetosonic modes in Galactic turbulence with synchrotron polarization
The equipartition of magnetic and thermal energy in the interstellar medium
(ISM) indicates the magneto-hydrodynamic nature of the interstellar turbulence,
which can be decomposed into three wave modes: Alfv\'en, fast and slow
magnetosonic modes\cite{Herlofson50,LG01,CL03}. Even for studies performed in
the case of subsonic turbulence, the magnetosonic modes have been revealed to
be more effective than the Alfv\'enic modes for processes such as cosmic ray
(CR) transport and acceleration \cite{YL04,Lynn14}. The multiphase nature of
ISM and diversity of driving mechanisms give rise to spatial variation of
turbulence properties. Nevertheless, the employed model of magneto-hydrodynamic
turbulence is often oversimplified being assumed to be only Alfv\'enic or even
hydrodynamic due to a lack of observational evidence. Here we report the
employment of our novel method, the signature from polarization analysis (SPA),
on unveiling the plasma modes in interstellar turbulence. Its application leads
to the first discovery of magnetosonic modes in the Cygnus X region. It is
found that the magnetosonic modes overlap to a high degree with Fermi cocoon,
consistent with theoretical expectations. Moreover, through comparison with the
spectrum at other wavelengths, the plasma modes of turbulence are unveiled in
active star formation zones. The SPA casts light on the plasma modes
composition of the Galactic turbulence, and marks the onset of a new era in the
study of interstellar turbulence and accordingly our understandings of relevant
processes including cosmic ray transport and star formation
Nuclear prolate-shape dominance with the Woods-Saxon potential
We study the prolate-shape predominance of the nuclear ground-state
deformation by calculating the masses of more than two thousand even-even
nuclei using the Strutinsky method, modified by Kruppa, and improved by us. The
influences of the surface thickness of the single-particle potentials, the
strength of the spin-orbit potential, and the pairing correlations are
investigated by varying the parameters of the Woods-Saxon potential and the
pairing interaction. The strong interference between the effects of the surface
thickness and the spin-orbit potential is confirmed to persist for six sets of
the Woods-Saxon potential parameters. The observed behavior of the ratios of
prolate, oblate, and spherical nuclei versus potential parameters are rather
different in different mass regions. It is also found that the ratio of
spherical nuclei increases for weakly bound unstable nuclei. Differences of the
results from the calculations with the Nilsson potential are described in
detail.Comment: 16 pages, 17 figure
Nuclear Anapole Moments in Single Particle Approximation
Nuclear anapole moments of Cs, Tl, Pb,
Bi are treated in the single-particle approximation. Analytical
results are obtained for the oscillator potential without spin-orbit
interaction. Then the anapole moments are calculated numerically in a
Woods-Saxon potential which includes spin-orbit interaction. The results
obtained demonstrate a remarkable stability of nuclear anapole moment
calculations in the single-particle approximation.Comment: 20 pages, LateX, One figure available upon request, BINP-93-11
Interstellar Sonic and Alfv\'enic Mach Numbers and the Tsallis Distribution
In an effort to characterize the Mach numbers of ISM magnetohydrodynamic
(MHD) turbulence, we study the probability distribution functions (PDFs) of
patial increments of density, velocity, and magnetic field for fourteen ideal
isothermal MHD simulations at resolution 512^3. In particular, we fit the PDFs
using the Tsallis function and study the dependency of fit parameters on the
compressibility and magnetization of the gas. We find that the Tsallis function
fits PDFs of MHD turbulence well, with fit parameters showing sensitivities to
the sonic and Alfven Mach numbers. For 3D density, column density, and
position-position-velocity (PPV) data we find that the amplitude and width of
the PDFs shows a dependency on the sonic Mach number. We also find the width of
the PDF is sensitive to global Alfvenic Mach number especially in cases where
the sonic number is high. These dependencies are also found for mock
observational cases, where cloud-like boundary conditions, smoothing, and noise
are introduced. The ability of Tsallis statistics to characterize sonic and
Alfvenic Mach numbers of simulated ISM turbulence point to it being a useful
tool in the analysis of the observed ISM, especially when used simultaneously
with other statistical techniques.Comment: 20 pages, 16 figures, ApJ submitte
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