1,721,036 research outputs found
Deposizione e caratterizzazione di film di Langmuir-Blodgett e loro applicazioni in sensori di gas tossici in aria
No full textX-Ray photoelectron spectroscopy characterisation of Langmuir-Blodgett films containing TiO2 nanoparticles grown by room-temperature hydrolysis of TiO(C2O4)22-
No full textMultivariate Statistical Analysis Applied to PM10, PM2.5 and PM1 Data Collected in Taranto (South Italy)
No full textPrincipal Component Analysis (PCA), Cluster Analysis (CA) and Factor Analysis (FA) with VARIMAX rotation were applied to the whole data set of PM10, PM2.5 and PM1 in order to determine the PM sources and their contributions. Daily aerosols samples of PM10, PM2.5 and PM1 were collected in Taranto (south Italy) from March 31st to April 26th, 2008. The statistical multivariate analysis of the data discriminated sea spray, traffic, heavy oil combustion, secondary aerosol and industrial emissions sources
Development of XPS in application to atmospheric particulate matter (PM) by comparison with results of Ion Chromatography
No full text
Carbonaceous particles and aerosol mass closure in PM2.5 collected in a port city
No full textMass concentrations of PM2.5, mineral dust, organic carbon (OC) and elemental carbon (EC), water-soluble organic
carbon (WSOC), sea salts and anthropogenic metals have been studied in a city-port of south Italy (Brindisi).
This city is characterized by different emission sources (ship, vehicular traffic, biomass burning and industrial
emissions) and it is an important port and industrial site of the Adriatic sea. Based on diagnostic ratios of carbonaceous
species we assess the presence of biomass burning emissions (BBE), fossil fuel emissions (FFE) and ship
emission (SE). Our proposed conversion factors from OC to OM are higher than those reported in the literature for
urban site: the reason of this could be due to the existence of aged combustion aerosols during the sampling campaign
(WSOC/OC = 0.6 ± 0.3)
A study on the catalytic hydrogenation of aldehydes using mayenite as active support for palladium
No full textAbstract Selective benzaldehyde reduction to benzyl alcohol was accomplished using a new catalyst based on Pd dispersed on mayenite (Ca12Al14O33) support. In this work, mayenite has been doped in its nanocages with H- ions to investigate its role in the reduction of aldehydes. Benzaldehyde reduction was observed in H2 atmosphere (120°C, 8 atm). Catalytic performances compared to commercial Pd/C catalyst are superior in terms of selectivity and comparable as activity
Study of Gas Sensing Performances of Langmuir-Blodgett Films Containing an Alkyne-Linked Conjugated-Porphyrin Dimer
No full text
Lapis lazuli usage for blue decoration of polychrome painted glazed pottery: a recurrent technology during the Middle Ages in Apulia (Southern Italy)
No full textSeven fragments of atypical proto-majolica from the archaeological site of Siponto (Manfredonia, Foggia) were analysed by chemical and
physical methods. All fragments have blue, brown and yellow painted decorations. Raman microscopy and Scanning Electron Microscopye
Energy Dispersed Spectroscopy (SEMeEDS) investigations identified the blue pigment to lapis lazuli. We previously identified this mineral in
the blue coloration of the tinelead glaze of proto-majolica finds at other Medieval sites in Apulia (Castel Fiorentino and Lucera). The discovery
of the fragments from Siponto, in spite of their peculiar technological-decorative features, proves that the use of lapis lazuli as a ceramic pigment
was not an isolated occurrence, but was quite commonin the Middle Ages in the production of typologically heterogeneous ceramics in Southern Italy.
To better define the scope of this use the composition of ceramic bodies was determined by Absorption Atomic Spectroscopy (AAS) and
Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES). The results were compared with those from Castel Fiorentino and
Lucera by multivariate statistical treatment.
To identify the technological features of these atypical proto-majolica fragments, investigations were also carried out on the ceramic bulk,
covering and decorations using Scanning Electron microscopye Energy Dispersed Spectroscopy (SEMeEDS) and Optical Microscopy (OM).
Below the tinelead glaze, characterized by a low tin content, a layer of clay material enriched in Ca and P was found that had been applied to obtain a white background for the painted decoration
- …
