Geological and Environmental science

science, Italy

Geological and Environmental science

science, Italy
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Imposa S.,Geological and Environmental science | Imposa G.,Civil and Environmental Engineer Freelance
1st IMEKO TC4 International Workshop on Metrology for Geotechnics, MetroGeotechnics 2016 | Year: 2016

Many recent researches show that the site seismic response is strongly influenced by stratigraphic and topographic features. Site response can reduce or amplify the earthquake induced ground motion. An integrated approach based on passive (HVSR) and active (MASW) seismic surveys, was carried out at the Garibaldi Hospital, located in Catania downtown, in order to evaluate the seismic site response. Fourteen environmental noise records, located near some previously mechanical drillings, were carried out and processed by using the Horizontal to Vertical Spectral Ratio (HVSR) technique. Successively, two MASW prospections were performed at the northern and the southern sides of the Hospital building, following the information deduced from the stratigraphic characteristics of soil drillings. The data obtained from this coupled analysis, method and the information derived by mechanical drillings previously performed, allowed us to obtain the site transfer function which can be related to the H/V average spectrum. Such integrated approach, based on passive and active seismic prospections, showed to be a reliable and quick method to obtain information for a site seismic characterization. According to Italian code a Vs30 profile was achieved and the soil type category was determined. © 2016, IMEKO-International Measurement Federation Secretariat. All rights reserved.


Lantieri A.,Geological and Environmental science | Pfister D.H.,Harvard University | LoBuglio K.F.,Harvard University
Mycotaxon | Year: 2012

The smooth-spored species inhabiting dung, mainly of the Peziza fimeti group, were studied morphologically and through ITS sequence comparison. The results established that Peziza varia is also able to fruit on dung, clarifying a long-standing situation regarding two conflicting interpretations given in P. fimeti literature. © 2012. Mycotaxon, Ltd.


Mazur M.,Kazimierz Wielki University in Bydgoszcz | Minissale P.,Geological and Environmental science | Sciandrello S.,Geological and Environmental science | Boratynski A.,Polish Academy of Sciences
Plant Biosystems | Year: 2015

The aim of the present study was the biometrical comparison and ecological analysis of six populations of Juniperus phoenicea complex from the western part of the species' geographic range, each represented by about 30 individuals. This is the first study to include the Sicilian population of J. turbinata sensu stricto. Seven features of the cones and seeds, two of the shoots and leaves and eight ratios were used to describe the individuals and populations which were then compared using statistical methods. Four of the analysed populations (representatives of J. turbinata s.s.) are closely related to each other. The two other populations representing J. phoenicea s.s. appear to be much more variable but on the whole the two taxa treated at a species level seem to be quite distinct from each other. It was also noted that there are two quite different ecologies of these species: the first is typical of the thermomediterranean belt which is only found at high altitudes in the mountains of north Africa, and the second circumscribed to the meso- or supramediterranean belt of western Spain, France and northwestern Italy. In many parts of its coastal distribution, Juniperus turbinata is endangered due to the construction of summer resorts and therefore actions to protect this species are needed. © 2015 Società Botanica Italiana


Columbu A.,University of Melbourne | De Waele J.,Geological and Environmental science | Forti P.,Geological and Environmental science | Montagna P.,CNR Marine Science Institute | And 5 more authors.
Geology | Year: 2015

Detailed geomorphological analysis has revealed that subhorizontal gypsum caves in the Northern Apennines (Italy) cut across bedding planes. These cave levels formed during cold periods with stable river beds, and are coeval with fluvial terraces of rivers that flow perpendicular to the strike of bedding in gypsum monoclines. When rivers entrench, renewed cave formation occurs very rapidly, resulting in the formation of a lower level. River aggradation causes cave alluviation and upward dissolution (paragenesis) in passages nearest to the river beds. The U-Th dating of calcite speleothems provides a minimum age for the formation of the cave passage in which they grew, which in turn provides age control on cave levels. The ages of all speleothems coincide with warmer and wetter periods when CO2 availability in the soils covering these gypsum areas was greater. This climate-driven speleogenetic model of epigenic gypsum caves in moderately to rapidly uplifting areas in temperate regions might be generally applicable to karst systems in different geological and climatic conditions. © 2015 Geological Society of America.


Varricchio E.,Geological and Environmental science | Russo F.,Geological and Environmental science | Coccia E.,Geological and Environmental science | Turchini G.,Deakin University | And 3 more authors.
Microscopy Research and Technique | Year: 2012

In this study, we report ghrelin and leptin immunoreactive (ir) cells distribution in the gastrointestinal tract and blood ghrelin and leptin levels in rainbow trout (Oncorhynchus mykiss) and Murray cod (Maccullochella peelii peelii) fed diets with different fatty acid compositions. Juvenile rainbow trout and Murray cod were fed five iso-energetic experimental diets containing fish oil (FO) or one of the following vegetable oils (VO): olive oil (OO), sunflower oil (SO), linseed oil (LO), and palm oil (PO); as the added dietary lipid source. The presence and distribution of both ghrelin and leptin ir cells in the gastrointestinal tract were affected by the inclusion of VO. Ghrelin ir cells were found in the gastric glands of rainbow trout and in the mioenteric plexuses of the stomach of Murray cod fed FO. Ghrelin ir cells were localized in the mucosa of the intestine of rainbow trout and Murray cod fed VO. Leptin ir cells were more abundant in the epithelial lining of the mucosa folds and in the glands of the stomach of rainbow trout fed VO. Leptin immunoreactivity was detected in the gastric mioenteric plexus of Murray cod fed FO. No differences were found both in ghrelin and leptin levels in blood plasma or in the growth rates of rainbow trout and Murray cod fed the different experimental diets. These observations suggest that dietary fatty acids play a role in the peripheral feeding regulation. © 2011 Wiley Periodicals, Inc.


Mancini B.,Geological and Environmental science | Scurti M.,Geological and Environmental science | Dormi A.,University of Bologna | Grottola A.,University of Modena and Reggio Emilia | And 2 more authors.
Environmental Science and Technology | Year: 2015

Contamination of hot water distribution systems by Legionella represents a great challenge due to difficulties associated with inactivating microorganisms, preserving the water characteristics. The aim of this study was to examine over the course of 1 year in 11 fixed sites, the impact of monochloramine disinfection on Legionella, heterotrophic bacteria (36°C), Pseudomonas aeruginosa contamination, and chemical parameters of a plumbing system in an Italian hospital. Three days after installation (T0), in the presence of monochloramine concentration between 1.5 and 2 mg/L, 10/11 sites (91%) were contaminated by L. pneumophila serogroups 3 and 10. After these results, the disinfectant dosage was increased to between 6 and 10 mg/L, reducing the level of Legionella by three logarithmic unit by 2 months postinstallation (T2) until 6 months later (T3). One year later (T4), there was a significant reduction (p = 0.0002) at 8/11 (73%) sites. Our data showed also a significant reduction of heterotrophic bacteria (36°C) in 6/11 (55%) sites at T4 (p = 0.0004), by contrast the contamination of P. aeruginosa found at T0 in two sites persisted up until T4. The results of the present study show that monochloramine is a promising disinfectant that can prevent Legionella contamination of hospital water supplies. © 2015 American Chemical Society.


Costa G.,Geological and Environmental Science | Conti E.,Geological and Environmental Science
Journal of Arachnology | Year: 2013

The Ariadna spiders (Araneae: Segestriidae) inhabiting the gravel plains of the Central Namib Desert construct individual burrows with a circular entrance surrounded by a ring of small pebbles; sometimes they close their burrows by a small stone. In the lichen fields, about 20 km east of Walvis Bay (Namibia), there is a consistent population of Ariadna spiders that can also use pieces of lichen both in the ring composition and as the plug when the burrow is closed. We sampled and monitored 175 burrows repeatedly between December 1999 and August 2000. In March 2000, an exceptionally high rainfall occurred in the Namib, leading to flooding even in our fieldwork station. We tested whether and to what extent an event of this magnitude could affect burrow closing. We found the rain event increased burrow closure by large, but not small or medium-sized, Ariadna sp. We suggest that the flooding event acted as an ecological resource pulse for these spiders. © 2013 The American Arachnological Society.


In this study, we report ghrelin and leptin immunoreactive (ir) cells distribution in the gastrointestinal tract and blood ghrelin and leptin levels in rainbow trout (Oncorhynchus mykiss) and Murray cod (Maccullochella peelii peelii) fed diets with different fatty acid compositions. Juvenile rainbow trout and Murray cod were fed five iso-energetic experimental diets containing fish oil (FO) or one of the following vegetable oils (VO): olive oil (OO), sunflower oil (SO), linseed oil (LO), and palm oil (PO); as the added dietary lipid source. The presence and distribution of both ghrelin and leptin ir cells in the gastrointestinal tract were affected by the inclusion of VO. Ghrelin ir cells were found in the gastric glands of rainbow trout and in the mioenteric plexuses of the stomach of Murray cod fed FO. Ghrelin ir cells were localized in the mucosa of the intestine of rainbow trout and Murray cod fed VO. Leptin ir cells were more abundant in the epithelial lining of the mucosa folds and in the glands of the stomach of rainbow trout fed VO. Leptin immunoreactivity was detected in the gastric mioenteric plexus of Murray cod fed FO. No differences were found both in ghrelin and leptin levels in blood plasma or in the growth rates of rainbow trout and Murray cod fed the different experimental diets. These observations suggest that dietary fatty acids play a role in the peripheral feeding regulation.

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