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Assessment of seismic ground motion amplification and liquefaction at a volcanic area characterized by residual soils

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Journal of Mountain Science 2020年第3期17卷 740-752页

作者： Luca MATASSONI andrea fiaschi Fondazione Parsec Via Galcianese20/H59100 PratoItaly(former)now at CittaMetropolitana di FirenzeDirezione Progetti StrategiciVia Cavour150129 FirenzeItaly Fondazione Parsec Via Galcianese20/H59100 PratoItaly

A seismic hazard was assessed related to site effects at Abbadia San Salvatore, central Italy, on the Mt. Amiata slopes, an ancient volcanic area characterized by residual soils(thick layers of loose to dense sands originated from weathering of the trachydacitic lavas). The seismic ground amplification and soil liquefaction related to these layers were recognized as the major seismic hazards for the ***, geophysical, and geotechnical surveys were carried out on the volcanic rocks. The Horizontal-to-Vertical Spectral Ratio(HVSR) analysis of 252 noise measurements and 29 shear-wave velocity models of the subsoil allowed a seismic microzonation of the studied area, distinguished by thick weathered volcanic sands and shear-wave impedance contrast with respect to the seismic bedrock(volcanic bedrock). The differentiation of classified zones allowed recognition of areas characterized by residual(almost undisturbed) soils from those with soils probably affected by flowing water. The analysis of hazards revealed that peak acceleration by seismic amplification of ground motion exceeded the value set by the national rules(0.175 g) in a restricted area of the zone characterized by the most perturbed soils(Zone D);the potential occurrence of soil liquefaction was also greater in this zone. Finally, the study showed potential high hazards due to site effects of the volcanic mountainous area characterized by residual soils as opposed to an alluvial plain formed by volcanic debris where these effects have generally been more recognized.

关键词： Site effects Residual soils Volcanic mountain area Seismic ground amplification Soil liquefaction Shear wave velocity

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Determination of Ascorbic Acid, Rutin and Antioxidant Capacities of Wild <i/>Allium roseum</i>from Italy

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Pharmacology & Pharmacy 2019年第5期10卷 271-282页

作者： Anna Ida fiaschi Daniela Cerretani Laura Moltoni andrea Menchiari Lucia Micheli Department of Medicine Surgery and Neuroscience University of Siena Siena Italy Department of Business and Law University of Siena Siena Italy

This study is designed to investigate the antioxidant status and the presence of biologically-active compounds in Allium roseum L. and to compare the results with those of Allium sativum L. The content of thiosulfinates (Thio) and the levels of flavonols (quercetin and rutin), ascorbic acid (AA), glutathione reduced (GSH), glutathione oxidized (GSSG) and the antioxidant enzymes activities of glutathione peroxidase (GPx), glutathione reductase (GR) and catalase (CAT), were evaluated in bulbs, bulblets, flowers bulblets, leaves and flowers. Our study shows that bulbs of Allium roseum contain levels significantly higher of GSH, GSSG, AA, Thio, rutin and the activity of GPx and GR significantly higher than bulbs of Allium sativum. Moreover, the bulbs of Allium roseum show a significantly higher content of GPx, GR, CAT, GSH and GSSG than bulblets, flowers bulblets, leaves and flowers of Allium roseum. In Allium roseum, the greatest content of Thio is present in the flowers bulblets, while the levels of AA, quercetin and rutin are greater in the flowers. In conclusion, our result shows how Allium roseum exhibits antioxidant capabilities in all its fresh organs. The bulbs, bulblets, flowers bulblets, leaves and flowers are a good source of important bioactive compounds. Allium roseum possesses properties comparable to garlic indicating its possible nutritional and medicinal value.

关键词： Rutin Ascorbic Acid Allium roseum Allium sativum

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