1,721,042 research outputs found
Protocolli Allergologici e Immunologici per la Gestione degli Atleti Agonisti e Non-Agonisti
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Acute effects of passive stretching after active and passive warm-up of leg extensor muscles during vertical jump.
No full textEarly microscopic evidence for endothelial damage in arterial microanastomoses
No full textThrombosis of the arterial microanastomosis is the major reason for flap complications. Thrombus formation can occur rapidly at the site of anastomosis, or it may be delayed in developing, inducing secondary ischemia. The damaged endothelial cells and the exposed connective tissue play an important role in the molecular and cell mechanisms of coagulation and thrombosis. For this reason the early morphological changes in the endothelial cell layer after arterial microanastomoses in the rat were investigated. The results showed that the anastomotic site appeared completely sealed, with cut ends protruding into the vessel lumen. Extensive deendothelialized areas with fibrin deposition were visible between surgical microclamps on the inner surface of the artery. For this reason we believe that the damaged endothelium and exposed connective tissue elements are the primary cause of thrombin formation, platelet accumulation, and thrombosis at the anastomotic site. The reconstructive surgeon must employ a very meticulous microvascular technique to minimize damage to the vascular endothelium
Expression of p53,bcl-2 oncoprotein and proliferating cell nuclear antigen in the human placenta.
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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