IMPACT DE LA POLLUTION URBAINE SUR LES MATÉRIAUX DU PATRIMOINE CULTUREL

10 p. (version du 9 juin 2006, mis en forme)National audienceQu'il soit extrait d'une carrière ou produit industriellement, un matériau est soumis à l'action de l'environnement dès sa mise en oeuvre. Ce sont les interactions successives entre l'environnement et le matériau qui vont entraîner un changement de son aspect et de ses caractéristiques. En d'autres termes, le matériau subit une altération c'est-à-dire un vieillissement. Dans un premier temps, les interactions matériaux-atmosphères créent des modifications qui intéressent la surface du matériau. Par la suite, l'altération progresse vers la profondeur entraînant ainsi une perte de matière plus conséquente. La progression de l'altération dépend des propriétés intrinsèques du matériau et de l'agressivité du milieu. Généralement, un environnement urbain montre des concentrations fortes en polluants gazeux et particulaires. Les gaz sont capables de générer des acides plus ou moins forts qui vont interagir avec le substrat entraînant une perte de matière par dissolution ou bien la formation d'encroûtement. Quant aux particules, elles peuvent catalyser des réactions de sulfatation, favoriser la fixation d'eau ou encore entraîner par leur dépôt un noircissement progressif des façades. Ces altérations engendrent des coûts d'entretien et de restauration considérable qui préoccupent de plus en plus les pouvoirs publics. Des normes en matière de qualité de l'air ont été fixées pour la santé et les écosystèmes mais restent à établir pour la préservation des matériaux du patrimoine culturel. Par ailleurs, la formulation par les industriels de matériaux à encrassement réduit trouvera certainement des applications dans le domaine de la conservation des matériaux du patrimoine

Smart technological tools for rising damp on monumental buildings for cultural heritage conservation. A proposal for smart villages implementation in the Madonie montains (Sicily)

The Madonie district, in the inner Sicily, is composed of 21 villages, custodians of heritage, traditions, and values that constitute the identity of this area, now exclusively entrusted to the collective memory of an increasingly elderly and inactive population. In the study area, full of tangible and intangible heritage, technological tools, can revitalize and reuse examples of architecture, especially monumental, whose main problem is a deep rising damp affecting the masonry. That is particularly critical for the historic/traditional architectures. This research implements, in one of the villages of the enclave, a new technology system, namely Information and Commu- nication Technology (ICT) tool, like Charge neutralisation Technology (CNT), in contrast to the usual application of the classic and well-known resolution systems. This kind of methodology has been already applied in many monumental buildings in Italy with brilliant results and supporting the protection, enhancement, and promotion of cultural heritage. In Sicily it was never used and represents, in line with the smart village approach, a viable technology to be applied. The smart village model is one of the increasingly popular research topics globally and provides technologies aimed at preserving the identity of the territory and the historical buildings. Culture, if usable and accessible to all, results as an economic resource, a tourist attraction, and a factor of identity. The goal is to develop these inner areas through the smart villages approach by implementing smart technologies and establishing a synergic union of centers to be more competitive in the Sicilian hinterland, but also at the national level, with respect to the wise use of administrative, political, and governmental strategies. Cultural heritage and innovation, together, retrace the past with a view to modernity. The country’s cultural heritage recovered and enhanced is a virtuous strategy to safeguard the identity and value of historic places such as that one of ancient villages and a way to find smart resilient strategies and a sustainability assessment for future communities

Identity and Labor Market Outcomes of Immigrants

This paper explores the relationship between social identity and labor market outcomes of immigrants. Using survey data from Italy, we provide robust evidence that immigrants with stronger feelings of belonging to the societies of both the host and home country have higher employment rates, while those who exclusively identify with the host country culture do not have a net occupational advantage. Analysis of the potential mechanisms suggests that, although simultaneous identification with host and home country groups can be costly, the positive effect of multiple social identities is especially triggered by the enlarged information transmission and in-group favoritism that identification with, and membership of, extended communities ensure

Papular dermatitis due to Leishmania infantum infection in seventeen dogs: diagnostic features, extent of the infection and treatment outcome

BACKGROUND: This study describes immunological responses, diagnostic features, follow up and treatment outcomes from seventeen dogs with papular dermatitis due to Leishmania infection diagnosed by cytology or real time-PCR. METHODS: Specific Leishmania humoral and cellular immune responses were evaluated by means of an immunofluorescence antibody test in all cases and a delayed-type hypersensitivity (DTH) reaction to leishmanin in eight cases. The extent of infection was studied in several tissues including blood, lymph node, conjunctival and oral swabs, by means of PCR, at the time of diagnosis and during follow-up. Culture was performed on nine dogs from cutaneous lesions and lymph node aspirates and molecular typing was carried out on isolates based on ITS-1, ITS-2 and Haspb gene sequencing analysis. RESULTS: Cytological and molecular results from fine needle aspirates of papules were diagnostic in 8 out of 13 (61.5%) cases and in 14 out of 15 dogs (93.3%), respectively. In all dogs, specific anti-Leishmania antibody levels were low or absent. Blood and lymph node PCRs and lymph node culture were negative in all dogs. Three out of the nine dogs (33%) were positive by culture from cutaneous lesions. The three isolates were identified as ITS type A, however, polymorphism was observed in the Haspb gene (PCR products of 626 bp, 962 bp and 371 bp). DTH response was positive in all tested dogs at the time of diagnosis. The majority of dogs were successfully treated with only N-methylglucamine antimoniate, after which cutaneous lesions disappeared or were reduced to depigmented, flattened scars. All dogs remained seronegative and the majority of dogs were negative by PCR in several tissues during follow-up. CONCLUSIONS: This study points out that papular dermatitis due to L. infantum is probably an underestimated benign cutaneous problem, associated with a parasite specific cell mediated immunity and a poor humoral immune response. Papular dermatitis is seen in young dogs, and appears to be a mild disease with restricted parasite dissemination and a good prognosis. PCR can be used as a non-invasive method to routinely evaluate papules if Leishmania infection is suspected in cases in which parasites are not visualized by cytology.The authors thank Dr. Carmen Cañavate (Instituto de Salud Carlos III, Madrid, Spain) for kindly providing L. infantum promastigotes for leishmanin skin test; Laura Perillo for her collaboration in cytopathology; Antonino Lombardo (Studio Veterinario Lombardo, Mascalucia, CT, Italy) for his collaboration in collecting the clinical cases. The authors are grateful to Francesca Soutter (Royal Veterinary College) for the English revision of the manuscript. The authors are also grateful to technicians of the CreNaL laboratory, IZS, Sicily for their technical help. The authors also thank the reviewers for the constructive critical revision of the manuscript. Laia Solano-Gallego holds a Ramón y Cajal senior researcher contract awarded by the Spanish Ministerio de Economia y Competitividad and the European Social Fund. Publication of the CVBD9 thematic series has been sponsored by Bayer HealthCare - Animal Health division.S

Breathing New Life into Historical Instruments. How to Monitor Corrosion

‘To play or to display’ is the dilemma that museums have to face, given the increasing trend towards historically informed performance. Brass instruments can suffer corrosion both during and after playing due to the high humidity inside them. To forestall or at least reduce corrosion, drying with a fan has been chosen as a preventive measure. The state of corrosion inside the tuning slides of the instruments was determined with a specially developed electrochemical sensor. The results of the project show that drying with a fan indeed reduces ongoing corrosion, when compared to a group of instruments played without preventive measures that showed an increasing corrosion rate over time

An assay system to evaluate riboflavin/UV-A corneal phototherapy efficacy in a porcine corneal organ culture model

The purpose of this study is to investigate the response of a porcine corneal organ cultures to the riboflavin/UV-A phototherapy in the injury healing of induced lesions. A porcine corneal organ culture model has been established. Corneal alterations in the stroma were valuated setting an assay system, based on an automated image analysis method able to quantify the damaged (brightness values), within of the 24 regions of interest (ROIs) in which the corneal section has been divided and integrating the data analysis with a multi-aspect approach. Three group of corneas have been analyzed: (healthy, injured and injured-and-treated group). Our study revealed a significant effect of the riboflavin/UV-A phototherapy in the injury healing of porcine corneas after induced lesions. The injured corneas had significant differences of brightness values in comparison to treated (p< 0.00) and healthy (p<0.001) corneas whereas the treated and healthy corneas showed not significant difference (p = 0.995). Riboflavin/UV-A phototherapy shows a significant effect in the restoring the brightness values of damaged corneas to the values of healthy corneas, suggesting treatment restores the injury healing of corneas after lesions. Our assay system may be compared to clinical diagnostic method such as the OCT imaging for in vivo damaged ocular structures investigations

An Assay System to Evaluate Riboflavin/UV-A Corneal Phototherapy Efficacy in a Porcine Corneal Organ Culture Model

The purpose of this study was to investigate the response of porcine corneal organ cultures to riboflavin/UV-A phototherapy in the injury healing of induced lesions. A porcine corneal organ culture model was established. Corneal alterations in the stroma were evaluated using an assay system, based on an automated image analysis method able to (i) localize the holes and gaps within the stroma and (ii) measure the brightness values in these patches. The analysis has been performed by dividing the corneal section in 24 regions of interest (ROIs) and integrating the data analysis with a "multi-aspect approach." Three group of corneas were analyzed: healthy, injured, and injured-and-treated. Our study revealed a significant effect of the riboflavin/UV-A phototherapy in the injury healing of porcine corneas after induced lesions. The injured corneas had significant differences of brightness values in comparison to treated (p < 0.00) and healthy (p < 0.001) corneas, whereas the treated and healthy corneas showed no significant difference (p = 0.995). Riboflavin/UV-A phototherapy shows a significant effect in restoring the brightness values of damaged corneas to the values of healthy corneas, suggesting treatment restores the injury healing of corneas after lesions. Our assay system may be compared to clinical diagnostic methods, such as optical coherence tomography (OCT) imaging, for in vivo damaged ocular structure investigations

Novel cDNAs encoding salivary proteins from the malaria vector Anopheles gambiae

AbstractSeveral genes encoding salivary components of the mosquito Anopheles gambiae were identified using a selective trapping approach. Among these, five corresponded to genes expressed specifically in female glands and their role may possibly be linked to blood-feeding. Our collection included a fourth member of the D7 protein family and two polypeptides that showed weak similarity to anti-coagulants from distantly related species. Moreover, we identified two additional members of a novel group of proteins that we named glandins. The isolation of tissue-specific genes represents a first step toward a deeper molecular analysis of mosquito salivary secretions

Earthquakes trigger the loss of groundwater biodiversity

Earthquakes are among the most destructive natural events. The 6 April 2009, 6.3-Mw earthquake in L\u27Aquila (Italy) markedly altered the karstic Gran Sasso Aquifer (GSA) hydrogeology and geochemistry. The GSA groundwater invertebrate community is mainly comprised of small-bodied, colourless, blind microcrustaceans. We compared abiotic and biotic data from two pre-earthquake and one post-earthquake complete but non-contiguous hydrological years to investigate the effects of the 2009 earthquake on the dominant copepod component of the obligate groundwater fauna. Our results suggest that the massive earthquake-induced aquifer strain biotriggered a flushing of groundwater fauna, with a dramatic decrease in subterranean species abundance. Population turnover rates appeared to have crashed, no longer replenishing the long-standing communities from aquifer fractures, and the aquifer became almost totally deprived of animal life. Groundwater communities are notorious for their low resilience. Therefore, any major disturbance that negatively impacts survival or reproduction may lead to local extinction of species, most of them being the only survivors of phylogenetic lineages extinct at the Earth surface. Given the ecological key role played by the subterranean fauna as decomposers of organic matter and "ecosystem engineers", we urge more detailed, long-term studies on the effect of major disturbances to groundwater ecosystems