Search results for "ASTER"
showing 10 items of 2223 documents
Superfici materiche nella percezione della scena urbana
2013
La percezione della scena urbana: superfici architettoniche. Gli interventi d’alterazione corticale nelle architetture dei centri minori del Parco delle Madonie modificano progressivamente il paesaggio urbano nei centri antichi. La parte più esterna di materia veicola l’immagine delle architetture e possiede un ruolo essenziale nella percezione dei quartieri storici che ancora caratterizzano i centri della riserva naturale; ma la tendenza a rimuovere le finiture storicizzate e le patine del tempo comporta l’alterazione irreversibile del carattere dei centri antichi. Doveva essere ovvio che sarebbe stato essenziale conservare i segni del tempo, che denotano l’autenticità materiale della part…
Le superfici di pietra artefatta. Conoscenza e diagnosi per la conservazione.
2009
La tesi di dottorato è incentrata sullo studio delle finiture architettoniche di pietra artificiale realizzate con metodi o ricette coperte da brevetto in Italia. La ricerca, dopo avere descritto le ricette e metodi per simulare le pietre naturali, propone una metodologia analitica diagnostica per la conservazione delle superfici architettoniche e mostra gli esiti delle sue applicazioni sperimentali. The PhD thesis is focused on the study of architectural finishes of artificial stone patented in Italy. The research, after presenting the recipes and methods to simulate natural stones, proposes an analytical diagnostic method for the conservation of architectural surfaces and shows the result…
Ruolo dell’indagine termografica nella conservazione delle facciate storiche: applicazioni termogrammetriche nella chiesa di San Sebastiano a Palermo
2010
Il contributo è relativo al tema del restauro delle facciate e tende a evidenziare il ruolo dell'indagine termografica nella conservazione delle superfici intonacate. The contribution is related to the theme of the facades restoration and tends to highlight the role of thermographic survey in the preservation of plastered surfaces.
Gypsy endogenous retrovirus maintains potential infectivity in several species of Drosophilids.
2008
Abstract Background Sequences homologous to the gypsy retroelement from Drosophila melanogaster are widely distributed among drosophilids. The structure of gypsy includes an open reading frame resembling the retroviral gene env, which is responsible for the infectious properties of retroviruses. Results In this study we report molecular and phylogeny analysis of the complete env gene from ten species of the obscura group of the genus Drosophila and one species from the genus Scaptomyza. Conclusion The results indicate that in most cases env sequences could produce a functional Env protein and therefore maintain the infectious capability of gypsy in these species.
Hexamermis sp. an entomopathogenous nematode associated with the European stink bug
2008
The nematodes of the Mermithidae family are a large and important group obligatory parasite of arthropods, principally insects, and are almost always lethal to their hosts. They are usually specific to a single species or to one or two families of them. A mermithid of the genus Hexamermis Steiner, was found parasiting the stink bug Rhaphigaster nebulosa Poda (Hemiptera: Pentatomidae), present on hazelnut plants in the Piedmont region. The bug feeds on various broadleaved woody plant and is considered a serious pest for Mermithidae in Italy. Considerations regarding the taxonomy of the Hexamermis genus are reported. From the taxonomic point of view is very difficult to describe the different…
The GTP- and Phospholipid-Binding Protein TTD14 Regulates Trafficking of the TRPL Ion Channel in Drosophila Photoreceptor Cells
2015
Recycling of signaling proteins is a common phenomenon in diverse signaling pathways. In photoreceptors of Drosophila, light absorption by rhodopsin triggers a phospholipase Cβ-mediated opening of the ion channels transient receptor potential (TRP) and TRP-like (TRPL) and generates the visual response. The signaling proteins are located in a plasma membrane compartment called rhabdomere. The major rhodopsin (Rh1) and TRP are predominantly localized in the rhabdomere in light and darkness. In contrast, TRPL translocates between the rhabdomeral plasma membrane in the dark and a storage compartment in the cell body in the light, from where it can be recycled to the plasma membrane upon subsequ…
Chromatin-associated RNA interference components contribute to transcriptional regulation in Drosophila
2009
RNA interference (RNAi) pathways have evolved as important modulators of gene expression that operate in the cytoplasm by degrading RNA target molecules through the activity of short (21-30 nucleotide) RNAs1-6. RNAi components have been reported to have a role in the nucleus, as they are involved in epigenetic regulation and heterochromatin formation(7-10). However, although RNAi-mediated post-transcriptional gene silencing is well documented, the mechanisms of RNAi-mediated transcriptional gene silencing and, in particular, the role of RNAi components in chromatin dynamics, especially in animal multicellular organisms, are elusive. Here we show that the key RNAi components Dicer 2 (DCR2) a…
The complete set of ribosomal proteins from the marine sponge Suberites domuncula
2005
The siliceous marine sponge Suberites domuncula is a member of the most ancient and simplest extant phylum of multicellular animals-Porifera, which have branched off first from the common ancestor of all Metazoa. We have determined primary structures of 79 ribosomal proteins (r-proteins) from S. domuncula: 32 proteins from the small ribosomal subunit and 47 proteins from the large ribosomal subunit. Only L39 and L41 polypeptides (51 and 25 residues long in rat, respectively) are missing. The sponge S. domuncula is, after nematode Caenorhabditis elegans and insect Drosophila melanogaster the third representative of invertebrates with known amino acid sequences of all r-proteins. The comparis…
A Framework to Improve the Disaster Response Through a Knowledge-Based Multi-Agent System
2017
The disaster response still faces problems of collaboration due to lack of policies concerning the information exchange during the response. Moreover, plans are prepared to respond to a disaster, but drills to apply them are limited and do not allow to determine their efficiency and conflicts with other organizations. This paper presents a framework allowing for different organizations involving in the disaster response to assess their collaboration through its simulation using an explicit representation of their knowledge. This framework is based on a multi-agent system composed of three generic agent models to represent the organizational structure of disaster response. The decision-makin…
Les comportements de protection face au risque naturel : de la résistance à l’engagement
2011
An adequate risk management requires taking into account all the categories of stakeholders, including the exposed populations. Nowadays, one difficulty is to involve these populations and consequently to understand their reactions face to the eventuality of a disaster's occurrence. Several issues must be addressed: how is the representation of risk built up ? How do people develop adaptive strategies towards risk ? And above all, how is it possible to ensure an increase in behaviours suited for prevention and protection ? After drawing up a report on the research in this area, we will discuss the limitations of a persuasive communication, in order to better understand the interest of a bin…