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The pulsation modes of the pre-white dwarf PG 1159-035
Costa, J. E. S.,Kepler, S. O.,Winget, D. E.,O'Brien, M. S.,Kawaler, S. D.,Costa, A. F. M.,Giovannini, O.,Kanaan, A.,Mukadam, A. S.,Mullally, F.,Nitta, A.,Provenç,al, J. L.,Shipman, H.,Wood, M. A EDP Sciences 2008 Astronomy and astrophysics Vol.477 No.2
Redaelli, M.,Kepler, S. O.,Costa, J. E. S.,Winget, D. E.,Handler, G.,Castanheira, B. G.,Kanaan, A.,Fraga, L.,Henrique, P.,Giovannini, O.,Provencal, J. L.,Shipman, H. L.,Dalessio, J.,Thompson, S. E.,Mu Blackwell Publishing Ltd 2011 Monthly notices of the Royal Astronomical Society Vol.415 No.2
<P><B>ABSTRACT</B></P><P>PG 1351+489 is one of the 20 DBVs – pulsating helium‐atmosphere white dwarf stars – known and has the simplest power spectrum for this class of star, making it a good candidate to study cooling rates. We report accurate period determinations for the main peak at 489.334 48 s and two other normal modes using data from the Whole Earth Telescope (WET) observations of 1995 and 2009. In 2009, we detected a new pulsation mode and the main pulsation mode exhibited substantial change in its amplitude compared to all previous observations. We were able to estimate the star's rotation period, of 8.9 h, and discuss a possible determination of the rate of period change of (2.0 ± 0.9) × 10<SUP>−13</SUP> s s <SUP>−1</SUP>, the first such estimate for a DBV.</P>
Physicochemical and histopathological parameters of broilers with dorsal cranial myopathy
Pavanello Ana Clara Longhi,Mendonça Fernanda Jéssica,Oliveira Thalita Evani Silva,Torezan Guilherme Baú,Di Santis Giovana Wingeter,Soares Adriana Lourenço 아세아·태평양축산학회 2023 Animal Bioscience Vol.36 No.6
Objective: This study aimed to investigate the effect of dorsal cranial myopathy (DCM) on chicken meat quality. Methods: Sixty-six Ross 308 AP broilers, 47 days old, of both sexes, weighing about 3.51 kg, were slaughtered according to standard industrial practices, and evaluated for meat color, pH, chemical composition, collagen content, fatty acid profile, and histopathological parameters. Comparisons between normal and DCM-affected meat were performed using Student's t-test at the 5% significance level. Results: Histological analysis of muscle tissues affected by DCM showed myofiber degeneration, proliferation of inflammatory cells, fibroplasia, and necrosis with fibrosis. DCM samples had lower protein content and higher moisture, ash, insoluble collagen, total collagen, and pH. DCM-affected meat was redder and more yellowish. There were no differences in lipid or soluble collagen contents between groups. DCM-affected meat had higher percentages of arachidonic acid (C20:4n−6) and eicosapentaenoic acid (C20:5n−3). Conclusion: This study revealed that DCM-affected meat exhibits considerable changes in quality parameters.
2006 WHOLE EARTH TELESCOPE OBSERVATIONS OF GD358: A NEW LOOK AT THE PROTOTYPE DBV
Provencal, J. L.,Montgomery, M. H.,Kanaan, A.,Shipman, H. L.,Childers, D.,Baran, A.,Kepler, S. O.,Reed, M.,Zhou, A.,Eggen, J.,Watson, T. K.,Winget, D. E.,Thompson, S. E.,Riaz, B.,Nitta, A.,Kleinman, S IOP Publishing 2009 The Astrophysical journal Vol.693 No.1