1,721,021 research outputs found
Sezione 309030, Carta Geologica Regionale, Scala 1:10.000, Regione Toscana
No full textMetadati Carta Geologica Regione Toscana scala 1:10.000. http://159.213.57.103/geoweb/listmet/lista_metadati_10k.ht
Phisical and combustion characterization of pyrolytic oils derived from biomass material upgraded by catalytic hydrogenation
No full textPhysical and combustion properties of a pyrolytic bio-oil are determined both as-obtained and after catalytic hydrodeoxygenation. The tests demonstrate that the hydrogenation treatment improves the oil as regards combustibility, viscosity and acidity. Combustion properties of the oil have been characterized by evaporation and temperature programmed combustion profiles
Anomalous high Sr/Ca ratios in waters in the Late Miocene (Messinian) Velona lacustrine system (central Apennines, Italy). Coincident evidence from comparative geochemistry of ostracod and mollusc shells
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Sr/Ca, Mg/Ca ratios and Sr and stable isotopes of biogeniccarbonates from the Late Miocene Velona Basin (central Apennines, Italy) provide evidence of unusual non-marine Messinian conditions
No full textThe Sr/Ca and Mg/Ca ratios of fossil ostracod and mollusc shells from a Late Miocene (Early Messinian) lacustrine sequence in the Velona Basin (central Apennines, Italy) were used to calculate the Sr/Ca and Mg/Ca of waters in which these taxa lived. Sr/Ca of these waters were always higher than the Sr/Ca calculated for the Messinian seawater, despite the broad salinity ranges(fresh water-oligo/mesohaline) inferred from the paleontological analyses. The estimated Mg/Cawater from the Velona samples are below the Mg/Ca value for coeval seawater even though they represent relatively high values when compared with many nonmarine waters. The salinity variations of the Velona lacustrine system, recorded by changes in faunal assemblages, are linked to variable inputs of Na'Cl from deep groundwaters and are not reflected in significant changes in Sr/Ca and Mg/Ca of the waters calculated from shell chemistry. The combination of d18O signatures and Sr isotopic ratios from molluscs from the Velona Basin suggests a non-marine environment. During some episodes of the lake history, given the saline inputs, the waters in the lake would attain a large solute concentration (oligo to mesohaline), although they retained the meteoric d18O signature. We compare the paleohydrochemical inferences from the studied sequence with other Messinian records, and we show the importance ofcombining paleoecological and geochemical proxies to obtain consistent paleoenvironmental reconstructions
Integrated sedimentary and molluscan facies analysis in the Plio-Pleistocene fluvio-lacustrine succession of the Mugello basin (Tuscany, Italy).
No full textCrystalline form of Cefdinir ammonium salt as an intermediate for the preparation of pure Cefdinir
No full textThe invention relates to crystalline Cefdinir ammonium salt of formula (I)
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