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The effects of platelet-activating factor (PAF) were studied on isolated feline basilar arteries (BAs) and human pial arteries (PAs). PAF contracted the BAs by 67% of the contraction induced by 124 mM K+ and the PAs by 80%. The contraction in BAs was unaffected by both indomethacin and the thromboxane receptor antagonist AH23848. PAF relaxed prostaglandin F2 alpha-contracted arteries. In BAs 10(-6
We consider various models of randomly grown graphs. In these models the vertices and the edges accumulate within time according to certain rules. We study a phase transition in these models along a parameter which refers to the mean life-time of an edge. Although deleting old edges in the uniformly grown graph changes abruptly the properties of the model, we show that some of the macro-characteri
In this text I examine how leading theologians within the Church of Sweden during the latter half of the nineteenth century elaborated on historical men as heroes in public speeches and in their works on the history of Christianity. The Christian hero as a prototype for contemporary Christians was emphasised within an evolving nationalistic discourse. The historical hero was of crucial importance
ICT changes continuously and we are used to look at IT in a slightly dif-ferent way every year. Things are developed and manufactured to be smaller and faster but few changes are truly technologically revolutionary. Some changes creep up on us as they arrive under cover of previously known technology. Solid State Disks (SSD) is such a technology. The use of SSD is simple enough and for many purpos
Two different main concepts for the treatment of a severe traumatic brain injury have been established during the last 15 years, namely the more conventional concept recommended in well-established guidelines (eg, U.S. Guideline, European Guideline, Addelbrook's Guideline from Cambridge), on the one hand, and the Lund concept from the University Hospital of Lund, Sweden, on the other. Owing to the
When skeletal muscle is stretched above optimal sarcomere length during tetanic activity there is an increase in force that stays above the isometric force level throughout the activity period. This long-lasting increase in contractile force, generally referred to as "residual force enhancement after stretch" (Fresid), has been studied in great detail in various muscle preparations over more than
