Results 41 to 50 of about 2,724,277 (202)
Polarization from the oscillating magnetized accretion torus [PDF]
, 2009 We study oscillations of accretion torus with azimuthal magnetic field. For several lowest-order modes we calculate eigenfrequencies and eigenfunctions and calculate corresponding intensity and polarization light curves using advanced ray-tracing methods.
arxiv +1 more source
The TQ equation of the 8 vertex model for complex elliptic roots of unity [PDF]
J.Phys.A40:14893-14926,2007, 2007 We extend our studies of the TQ equation introduced by Baxter in his 1972 solution of the 8 vertex model with parameter $\eta$ given by $2L\eta=2m_1K+im_2K'$ from $m_2=0$ to the more general case of complex $\eta.$ We find that there are several different cases depending on the parity of $m_1$ and $m_2$.
arxiv +1 more source
A transmissible disease of the bursa of Fabricius of ducks [PDF]
Avian Pathology, 1994 Longitudinal surveys of commercial Pekin ducks from four farms with a history of poor flock performance and high mortality rate showed that there was lymphoid depletion of the bursa of Fabricius in most ducks selected from 7 days of age onward. Such lesions were not present in Pekin ducks from a farm with a history of good flock performance and low ...
J. A. Smyth, M. S. McNulty
openaire +3 more sources
Veterinary Medicine and Science, 2023 Background Thymus, bursa of Fabricius and spleen are the major lymphoid organs of avian species that plays a crucial role in their immunity. Though glucocorticoids are reportedly used as growth promoters, they also suppress the immune system.
Rafiqul Islam +3 more
doaj +1 more source
Spin diffusion and the spin 1/2 XXZ chain at $T=\infty$ from exact diagonalization [PDF]
Physical Review B 57, 8340 (1998), 1997 We study the long time behavior of the zz and xx time dependent autocorrelation function of the spin 1/2 XXZ chain at $T=\infty$ by exact diagonalizations on a chain of 16 sites. We find that the numerical results for the zz correlation are very well fit by the formula $t^{-d}[A+Be^{-\gamma (t-t_0)}\cos \Omega(t-t_0)].$ From this we estimate $d$ as a ...
arxiv +1 more source
Cryptosporidium spp. in bursa of Fabricius of broiler chickens from Uruguay
Ciência Rural, 2015 The presence of Cryptosporidium spp. was detected in broiler chickens of 32-40 days of age, colonizing the bursa of Fabricius. The histologic study with haematoxylin and eosin staining was done on specimens of trachea, complete intestinal tract and bursa.
Susana Casanova +2 more
doaj +1 more source
Temperature dependent spatial oscillations in the correlations of the XXZ spin chain [PDF]
Physical Review Letters 82, 5365 (1999), 1998 We study the correlation $<\sigma^z_0\sigma^z_n>$ for the XXZ chain in the massless attractive (ferromagnetic) region at positive temperatures by means of a numerical study of the quantum transfer matrix. We find that there is a range of temperature where the behavior of the correlation for large separations is oscillatory with an incommensurate period
arxiv +1 more source
GROSS MORPHOMETRICAL STUDY ON BURSA OF FABRICIUS IN DEVELOPING BRONZE TURKEY (MELEAGRIS GALOPAVO) [PDF]
Trakia Journal of Sciences, 2020 The aim of the study was an evaluation of the age related development of bronze turkey's bursa of Fabricius. The obtained data gave information about the standard actual values of the metric parameters in the investigated organ.
G. Penchev
doaj +1 more source
The Mira discovery problem -- Observations by David Fabricius in 1596 and 1609 (and by others before?): Positional accuracy, brightness, color index, and period [PDF]
Astronomical Notes 345, e20230131 (2024)The pulsating variable star Mira (omikron Ceti) was observed by David Fabricius (Frisia) in 1596 and 1609. We review suggested previous detections (e.g. China, Hipparchos). We analyze all Mira records from Fabricius in their historical context. Fabricius measured the separation of Mira to other stars to \pm 1.6-1.7'.
arxiv +1 more source
The Bursa of Fabricius: The Evolution of a Discovery
Poultry Science, 1994 It has been a joy these past 40 yr to have traveled the "Bursal Road"--a road we helped construct and whose route allowed us to make a variety of observations that contributed either to basic science or indirectly or directly to the role of the bursa of Fabricius in the B cell repertoire.
openaire +3 more sources