1,721,101 research outputs found
Intersezioni tra biologia dello sviluppo ed ecosistemica: nuove prospettive per l'evoluzione
No full textL’articolo esplora alcuni aspetti legati all’intersezione disciplinare di due aree di ricerca che, come testimonia la letteratura, sono oggetto di crescente interesse per epistemologi e storici delle scienze della vita. La biologia evoluzionistica dello sviluppo e l’ecologia dei sistemi hanno instaurato un rapporto reciprocamente fecondo, in concomitanza con l’affievolirsi della versione forte del neo-darwinismo e con il conseguente sviluppo dell’epigenetica, di ispirazione lamarckiana. Il neo-lamackismo indagato dagli autori consta di due aspetti essenziali: uno incentrato maggiormente sulla Teoria Evo-Devo e sulla selezione interna, l’altro sulla systems ecology e sull’estensione del concetto di ambiente
Rapid efficient route to 3-hydroxy-o-phenylenediamine derivatives and derived benzoxazolines
No full textVinylamines XI. Structure and reactivity of 2-carbalkoxy-, 2-acyl- and 2- phenyl-cyclohexanone enamines with ethylazodicarboxylate and phenylisocyanate
No full textGoing 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
CONTRACTION OF SUBSTITUTION-REACTION RINGS IN NON-OBSTRUCTED HEXOPYRANOSIDE 4-O-MESYLATES
No full textA NEW METHOD FOR RESOLVING RACEMIC 2-DEOXYHEXOSES - TOTAL SYNTHESIS OF D-AND L-2,3,6-TRIDEOXY-ERYTHRO-HEXOSE (AMICETOSE)
No full textAN IMPROVED PREPARATION OF 3,4-O-ISOPROPYLIDENE DERIVATIVES OF ALPHA-D-GALACTOPYRANOSIDES AND BETA-D-GALACTOPYRANOSIDES
No full textVinylamines XII. Equilibrium in enamines from 3-substituted cyclohexanone: high selectivity of β-nitrostyrene towards the Δ6 isomers
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