background and aims: vaccine is available, but fetal infection with rubella virus is still a main cause of congenital birth defects and mental retardation in many countries. mass vaccination campaigns and expanded program of immunization (epi) have increased vaccine coverage in the world with a substantial impact on the reduction of rubella infections, such as congenital rubella syndrome (crs)....

High-sensitivity maps of the large-scale structure of atomic hydrogen in the starburst dwarf galaxy NGC 1569 show evidence for an HI cloud with a mass of 7 · 10 6 M ⊙ , at a projected distance of 5 kpc from the parent galaxy. This cloud may be a condensation in a low-column-density HI halo or a companion galaxy/HI-cloud. NGC 1569 and its companion are connected by a low surface brightness HI br...

It is well known that every tournament has a directed path containing all the vertices of V , i.e. a hamiltonian path. It is an easy exercise to show that a tournament has a unique such path if and only if the arcs of A induce a transitive relation on V . In this paper we show that by reversing the arcs of the hamiltonian path in a transitive tournament with n vertices we obtain a tournament wi...

BACKGROUND We have previously shown how tumor response of isolated limb perfusion (ILP) with melphalan was improved when tumor necrosis factor alpha (TNF-alpha) was added. Taking into account that other vasoactive drugs could also improve tumor response to ILP, we evaluated histamine (Hi) as an alternative to TNF-alpha. METHODS We used a rat ILP model to assess the combined effects of Hi and ...