1,721,342 research outputs found
Educazione e natura umana. Snodi di applicazione di un'idea
No full textIl saggio riprende i significati implicati nella nozione classica di "Natura umana", presentandone la versatilità e discutendone le possibilità di applicazione nel contesto delle problematiche relative alla fondazione di una filosofia dell'educazion
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
Specific pattern of instability of Escherichia coli HisG gene cloned in Bacillus subtilis via the Staphylococcus aureus plasmid pCS194
No full textThe plasmid pCS194, generated in vivo by recombination of two Staphylococcus aureus plasmids, pC194 and pS194, coding, respectively, for chloramphenicol (Cm) and streptomycin (Sm) resistance, can be replicated also in Bacillus subtilis in the presence of either of the two antibiotics. In their absence, no segregation of the individual components is observed, but the whole plasmid is lost at a rate of about 10% per generation. The unique EcoRI site of pCS194 is located in the SmR determinant. EcoRI-cleaved pCS194 has been joined to an EcoRI-linearized Escherichia coli replicon, the in vitro recombinant pHisG plasmid, composed of the vector pBR313 plus a BglII-segment of E. coli chromosomal DNA, containing a functional hisG gene. The ligation mixture has been used to transform either E. coli or B. subtilis. Following E. coli transformation and selection for ApR and CmR (the latter is expressed in E. coli by the pC194 determinant), two his+ clones were picked at random and the plasmids ex..
Numerical Analysis of the Performance of the DU91-W2-250 Airfoil for Straight-Bladed Vertical-Axis Wind Turbine Application
No full textGENERALIZED GRANULOMA ANULARE IN A CHILD ASSOCIATED WITH THE RECENT EPSTEIN BARR VIRUS INFECTION
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