1,721,232 research outputs found
Short report: A new polymerase chain reaction-restriction fragment length polymorphism method to identify Anopheles arabiensis from An. gambiae and its two molecular forms from degraded DNA templates or museum samples.
No full textAedes albopictus (Diptera: Culicidae) a Roma: analisi sperimentale di parametri rilevanti in strategie di controllo.
No full textOccupation of sewer drain basins by Aedes albopictus larvae in a heavily infested area of Rome, Central Italy.
No full textLarval biology and control of Aedes albopictus in a heavily infested area of Rome: susceptibility to Temephos and its persistence in sewer drain basins.
No full textOn the distribution and genetic differentiation of Anopheles gambiae s.s. molecular forms
No full textThis paper summarises published and unpublished data on the spatial and temporal distribution, and on the genetic characterisation of molecular forms M and S of Anopheles gambiae s.s. The two forms are characterised by a high level of gene-flow restriction, by a largely overlapping geographical and temporal distribution, and by a low degree of genetic differentiation. Floating paracentric inversions on chromosome-2 are shown to be shared by the two forms, although with very different frequencies of alternative arrangements, confirming that these inversions are most probably involved in ecotypic adaptation, rather than in the building of reproductive barriers. Further studies and tools are needed to throw light on the genetic and biological differentiation of M and S to improve the knowledge of the real composition of the vector system, of its demography, population genetics and dynamics, also in view of the possible consequences on the transmission of human pathogens in sub-Saharan Africa. Preliminary results and perspectives of the use of transposable element insertion sites as markers of genetic differentiation and tools for population genetic studies are discussed. (c) 2005 Elsevier Ltd. All rights reserved
La nuova pianificazione territoriale in Puglia fra crescenti consapevolezze e ostinate resistenze
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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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