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One of the most recent discoveries of the INTEGRAL observatory is the existence of a previously unknown population of X-ray sources in the inner arms of the Galaxy. IGR J17544−2619, IGR J16465−4507 and XTE J1739−302 are among these sources. Although the nature of these systems is still unexplained, the investigations of the optical/NIR counterparts of the(More)
Disulfide-bond formation is a major post-translational modification and is essential for protein folding, stability, and function. This is especially true for secreted proteins, many of which possess great potential for biotechnological applications. Focusing on the use of Escherichia coli for the production of this class of proteins, we describe the(More)
Gamma-ray bursts (GRBs) are short, intense flashes of soft gamma-rays coming from the distant Universe. Long-duration GRBs (those lasting more than approximately 2 s) are believed to originate from the deaths of massive stars, mainly on the basis of a handful of solid associations between GRBs and supernovae. GRB 060614, one of the closest GRBs discovered,(More)
We developed a Monte Carlo code to generate long-duration gamma ray burst (LGRB) events within cosmological hydrodynamical simulations consistent with the concordance ΛCDM model. As structure is assembled, LGRBs are generated in the substruc-ture that formed galaxies today. We adopted the collapsar model so that LGRBs are produced by single, massive stars(More)
The only supernovae (SNe) to show gamma-ray bursts (GRBs) or early x-ray emission thus far are overenergetic, broad-lined type Ic SNe (hypernovae, HNe). Recently, SN 2008D has shown several unusual features: (i) weak x-ray flash (XRF), (ii) an early, narrow optical peak, (iii) disappearance of the broad lines typical of SN Ic HNe, and (iv) development of(More)
Using estimates of the distance and proper motion of Geminga and the constraints on its radial velocity posed by the shape of its bow shock, we investigate its birth place by tracing its space motion backwards in time. Our results exclude the λ Ori association as the origin site because of the large distance between both objects at any time. Our simulations(More)
We previously reported a multigene family of monodomain Kunitz proteins from Echinococcus granulosus (EgKU-1-EgKU-8), and provided evidence that some EgKUs are secreted by larval worms to the host interface. In addition, functional studies and homology modeling suggested that, similar to monodomain Kunitz families present in animal venoms, the E. granulosus(More)
Aims. Gamma Ray Bursts (GRBs) can be profitably used to study the Inter Stellar Matter (ISM) of high redshift galaxies. Methods. To this purpose we analyze high resolution spectroscopic observations (R=20000-45000, corresponding to 14 km/s at 4200Å and 6.6 km/s at 9000Å) of the optical afterglow of GRB050730, obtained with UVES@VLT ∼ 4 hours after the GRB(More)
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