This paper presents high resolution X-ray observations with Chandra of NGC 4258 and infers the nature of the so called " anomalous arms " in this galaxy. The anomalous arms dominate the X-ray image; diffuse X-ray emission from the " plateaux " regions, seen in radio and Hα imaging, is also found. X-ray spectra have been obtained at various locations along the anomalous arms and are well describ...

results aβ (1-42) stimulated the production of the proinflammatory cytokines il6, il1β, tnfα, and il18 in both the primary microglia cell culture and the b92 cell line. both the raav-il4 construct and the ril-4 protein were found to inhibit production of the most important aβ (1-42)-induced proinflammatory cytokine mrnas in the two types of cells with different patterns. conclusions it seems th...

A number of emission and absorption features are expected to be visible in high energy resolution X-ray spectra of type 1 AGN with ionized gas along the line of sight (so called " warm absorbers "). Emission strongly depends on the geometrical configuration of the gas, while absorption along the line of sight does not. Absorption features include photoelectric absorption K and L edges along wit...

If the large-scale galaxy distribution is lamentary, as suggested by some observations and recent hydrodynamical simulations, then lengthwise views of laments will apparently produce compact groups (CGs) that are in reality stretched out along the line of sight. This possibility has been advocated recently by Hernquist, Katz & Weinberg (1994). Here, we propose a test for this hypothesis using X...

X inactivation is a chromosome-specific form of genetic regulation in which thousands of genes on one homologue become silenced early in female embryogenesis. Although many aspects of X inactivation are now understood, the spread of the X inactivation signal along the entire length of the chromosome remains enigmatic. Extending the Gartler-Riggs model [Gartler, S. M. & Riggs, A. D. (1983) Annu....

Nucleosynthesis in Type I X-ray bursts (XRB) proceeds eventually through the rp-process near proton drip-line. Several N=Z nuclei act as waiting points reaction network chain. Astrophysical calculations of XRB light curves depend upon theoretical modelling beta decays interest, with 64 Ge, 68 Se, 72 Kr, 76 Sr, and their second-neighbours N=Z+2 being key this context. We have carried out differe...

[1] The dynamics of x-line formation and evolution in 3D magnetic reconnection is studied using a fully kinetic approach. An x-line of small length is initialized using a perturbation localized in the current direction. The electrons and ions drift diamagnetically along the current direction of the initial x-line and are further accelerated by the reconnection electric field. The electron and i...

This paper is involved with the asymptotics associated to Bohr-Sommerfeld Lagrangian submanifolds of a compact Hodge manifold, in the context of geometric quantization (see e.g. [BW], [BPU], [GS3], [W]). We adopt the general framework for quantizing Bohr-Sommerfeld Lagrangian submanifolds presented in [BPU], based on applying the Szegö kernel of the quantizing line bundle to certain delta funct...

These four solutions give four trajectories which are easy to plot. Consider the first, for example. When t = 0, the point is at (1, 1). As t increases, the point moves outward along the line y = x. As t decreases through negative values, the point moves inwards along the line, toward (0, 0). Since t is always understood to be increasing on the trajectory, the whole trajectory consists of the r...