The synchrotron shock model (SSM) for gamma-ray burst emission makes a testable prediction: that the observed low-energy power-law photon number spectral index cannot exceed −2/3 (where the photon model is defined with a positive index: dN/dE ∝ E α). We have collected time-resolved spectral fit parameters for over 100 bright bursts observed by the Burst And Transient Source Experiment on board ...

Endotoxin shock and contact system activation were used to study effects of hirudin, antithrombin III, eglin C, aprotinin, and [Arg15]-aprotinin in anesthetized pigs. Alterations in the systemic and pulmonary circulation were in part prevented by administration of the inhibitors.

Introduction: The Martian origin of the group of SNCO’s comprising now 16 different meteorites is widely accepted [1]. The ejection of these meteorites from Mars requires an impact process which necessarily involves a certain level of shock metamorphism affecting the meteorites to get accelerated to Martian escape velocity. Previous studies [2 and ref. in 1] clearly showed that all 16 Martian m...

We suggest that non-thermal emission can be produced by multiple scatterings of the photons between the supernova ejecta and pre-shock material in supernova shock breakout. Such bulk-Comptonization process may significantly change the original thermal photon spectrum, forming a power-law non-thermal component at higher energies. We then show that the luminous X-ray outburst XRO081009 associated...

PASSING THROUGH JOVIAN RESONANCES: RELATIVE IMPORTANCE OF BOW SHOCKS AND IMPACT SHOCKS. L. L. Hood 1 , F. J. Ciesla 2 , N. A. Artemieva 3,4 , F. Marzari 5 , and S. J. Weidenschilling 4 , 1 Lunar and Planetary Laboratory, Univ. of Arizona, Tucson, Arizona 85721, [email protected], 2 Dept. of Geophysical Sciences, Univ. of Chicago, Chicago, Illinois 60637, 3 Institute for Dynamics of Geospheres...

The family of small heat shock proteins is the more variable among the highly conserved superfamily of heat shock proteins (HSP). Using a metabolic labeling procedure with tissue explants, we have detected in chickens a new member of the small HSP family with an apparent molecular weight of 29-kDa. This protein was induced in broiler chickens' heart muscle and lungs following an in vivo heat st...

Cold storage and reperfusion injury to transplanted kidneys contributes to increased incidence of delayed graft function and may have a negative impact on graft survival. This study examined the mechanisms by which previous heat shock protects against cell death in an in vitro model of kidney storage. Cold storage is mimicked by incubating human renal proximal tubular epithelial (HK-2) cells in...

background: the aim of this study is to create an ex vivo model to examine the expression of two heat shock protein 70 (hsp70) family members, heat shock protein 72 (hsp72) and heat shock constitute protein 70 (hsc70), at the mrna and protein levels in differentiating corneal cells from air exposed limbal stem cells. materials and methods: limbal biopsies were cultured as explants on a cellular...

The enhanced expression of heat shock proteins (HSPs) can be detected in response to high temperatures, as well as to many kinds of stressors, including pollutants. Partial cDNA sequences encoding HSP30, HSP70, HSP90 beta, and heat shock cognate (HSC) 70, and full-length cDNA sequences encoding HSP27, HSP47 and HSP60 were cloned from goldfish (Carassius auratus). The expression of these genes w...

We present an analytical approach to calculate the hydrodynamics of the interaction between a relativistic ejecta and a surrounding medium, whose evolution serves as a model for Gamma-Ray Burst afterglows. We investigate the effect of the relevant model parameters on the X-ray, optical and radio fluxes, and the effect of a refreshed shock energy input and anisotropy in the ejecta on the shape o...