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.
Simmons A.T.,PI Corporation |
Tosdal R.M.,University of British Columbia |
Wooden J.L.,Geological and Environmental science |
Mattos R.,Anglo American |
And 3 more authors.
Economic Geology | Year: 2013
The Paleocene to Eocene southern Peru porphyry belt contains three significant porphyry Cu-Mo deposits at Cuajone, Quellaveco, and Toquepala. Ten new zircon U-Pb Sensitive High Resolution Ion Microprobe- Reverse Geometry (SHRIMP-RG) ages for Cuajone and Toquepala, together with published ages for Quellaveco, establish a magmatic history characterized by episodic events. Punctuated magmatism at Cuajone is distributed over approximately 13 m.y., at Toquepala over 8 m.y., and at Quellaveco over 6 m.y. The ages of the porphyry intrusions hosting or associated with the introduction of Cu and Mo at the three deposits show remarkable similarity, with emplacement beginning and ending at approximately 56.5 to 53.0 Ma at Cuajone, 57.0 to 54.0 Ma at Toquepala, and at 58.4 to 54.3 Ma at Quellaveco. Field relations coupled with the U-Pb ages for synmineral intrusions suggest very similar timing of the cupriferous hydrothermal systems, with the youngest pyritiferous and Cu-poor hydrothermal systems being associated with porphyry intrusions as much as 2 m.y. younger than significant Cu introduction. Overall, the porphyry Cu-Mo intrusive complexes represent the youngest magmatic complexes formed during the Late Cretaceous and early Tertiary arc, having formed prior to eastward migration of the magmatic locus. © 2013 Society of Economic Geologists, Inc.
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.
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.
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