Search results for " Phylogenesis"
showing 4 items of 4 documents
Ontogenesis and phylogenesis in the passage from arithmetic to algebraic thought
2012
With this work we retrace some of the fundamental historical and historical epistemological steps of the evolution of algebraic thought. Given the accepted parallelism between ontogenesis and phylogenesis we believe such a research to be a useful approach to the interpretation of obstacles and difficulties that students encounter during the acquisition of algebraic thought.
Genetic variability and population structuring in the European Lanner Falcon Falco biarmicus feldeggii
2019
We analysed variation in 10 polymorphic microsatellites and a variable portion of control region of mtDNA in 24 specimens from 3 populations of European Lanner Falcon Falco biarmicus feldeggii living in Sicily, continental Italy and the Balkan area to assess species' genetic diversity and population structure in the poorly investigated range of this threatened subspecies. We considered also a dataset of previously published mtDNA sequences of the other Lanner Falcon subspecies and of Hierofalco subgenus members (F. cherrug, F. rusticolus and F. jugger) to outline the genetic variation in the region on a wide-ranging basis. Regard with mtDNA we identified 6 haplotypes from our 24 European La…
Incompiute città di Palermo
2019
Con l’ultimo numero 23-24, interamente dedicato alla città di Palermo, la rivista “Architettura Civile” pone al centro dell’attenzione la questione della città contemporanea e delle sue molteplici declinazioni architettoniche, con un atteggiamento che, non senza disincanto, riconsidera lo studio e la riflessione sulla città e sulle sue condizioni attuali come fondamento del progetto di architettura. In questo caso Palermo, “città mitica e mitizzata” e al contempo “stereotipo di processi di incontrollata urbanizzazione” rappresenta un caso esemplare; nel tema delle Incompiute idee di città possibili si rende infatti riconoscibile il paradigma connotativo dello stesso divenire di Palermo, lun…
Lipocalins in Arthropod Chemical Communication.
2021
Abstract Lipocalins represent one of the most successful superfamilies of proteins. Most of them are extracellular carriers for hydrophobic ligands across aqueous media, but other functions have been reported. They are present in most living organisms including bacteria. In animals they have been identified in mammals, molluscs, and arthropods; sequences have also been reported for plants. A subgroup of lipocalins, referred to as odorant-binding proteins (OBPs), mediate chemical communication in mammals by ferrying specific pheromones to the vomeronasal organ. So far, these proteins have not been reported as carriers of semiochemicals in other living organisms; instead chemical communicatio…