Local density oscillations near the neutron-star surface can generate shock waves; in these shocks, the electron-positron plasma is stratified from the remaining matter, and shells of an expanding relativistic fireball with an oscillation time scale in cosmological gamma-ray bursts (GRBs) of 10 2...
The distribution of cosmic-ray sources in the Galaxy, $\\mathsf{\\gamma}$-rays and the gradient in the CO-to-H$\\mathsf{_2}$ relation We present a solution to the apparent discrepancy between the radial gradient in the diffuse Galactic gamma-ray emissivity and the distribution of super...
A leading mechanism for producing cosmological gamma-ray bursts (GRBs) is viaultra-relativistic particles in an expanding fireball. The kinetic energy ofthe particles is converted into thermal energy in a forward shock and a reverseshock, when the outward flowing particles encounter the interstellar...
TODDhas put forward evidence against the suggestion that the positron is a constituent of the nucleus. He states that for a definite atomic mass P, and a definite atomic number Z, the arrangement of α-particles, neutrons, etc., in the atomic nucleus should be such as to give a unique ...
Identification of partial complexes has also offered clues to protein–protein interactions within the γ-secretase complex. Biophysical methods have allowed 3D views of the γ-secretase complex and presenilins. Most recently, the crystal structure of a microbial presenilin homolog has confirmed a nine...
structure must be regular, with each protein subunit occupying a position at least approximately equivalent to that occupied by all other proteins of its class in the final structure (the principle of quasi-equivalence), although some viruses are now known to violate the principle of quasi-...
MINIBALL: The first gamma-ray spectrometer using segmented, encapsulated germanium detectors for studies with radioactive beams MINIBALL is a new spectrometer of position-sensitive Ge detectors designed for nuclear-structure studies at the REX-ISOLDE (D. Habs etal. , Prog. Part. Nuc... N Warr,...
The defect crystal structures of {eta}-, {gamma}- and {theta}-alumina obtained from dehydroxylation of well crystallized bayerite and boehmite have been derived from the analysis of their X-ray powder diffraction patterns and from the Rietveld refinement of their neutron powder diffraction patterns....
Structure and function of steroid receptor AF1 transactivation domains: induction of active conformations. Biochem J 2005; 391: 449–64. CAS PubMed PubMed Central Google Scholar Chandra V, Huang P, Hamuro Y, Raghuram S, Wang Y, Burris TP, et al. Structure of the intact PPAR-gamma-RXR-...
Research over the past 25 years has led to the view that the rich tapestry of present-day cosmic structure arose during the first instants of creation, where weak ripples were imposed on the otherwise uniform and rapidly expanding primordial soup. Over 1