Search results for " Ben"
showing 10 items of 1402 documents
Caratterizzazione delle vernici da antichi strumenti musicali.
2011
Caritas e bene comune
2014
Tra il XIII e il XIV secolo in Italia, e soprattutto a Firenze, prende forma una nuova ideologia del «bene comune», molto legata al rafforzamento dello «stato» comunale durante la fase caratterizzata dal dominio del «popolo» . Alla base di questo rinnovamento sta l’esplicita politicizzazione della virtù cristiana della carità. Il legame politico rientrava tradizionalmente nelle categorie dell’amicizia e dell’amore, non della carità, virtù «universale» che legava l’uomo a Dio e gli uomini tra di loro nella comunità della chiesa: il sistema tomista fornisce un rappresentazione codificata di questa logica. Viceversa, alcuni autori, da Tolomeo da Lucca a Remigio de’Girolami a Coluccio Salutati,…
Metals distribution in the organic and inorganic fractions of soil: A case study on soils from Sicily
2005
The content of Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn, has been determined in the organic and inorganic fraction of eight soil samples from Sicily. A modified type-Tessier sequential extraction procedure has been used to recognize metals in five different fractions categorised as follows: (a) exchangeable metals, (b) metals bound to carbonates, (c) metals bound to iron and manganese oxides, (d) metals bound to organic matter, and (e) metals in residual fraction. The mineralogical composition of soils samples was characterized by X-ray diffraction. Humic substances were extracted by means of an alkaline extraction procedure. It has been found that both the mineralogical composition and the di…
Microphase separation upon crystallization of small amphiphilic molecules: ‘low’ temperature form II of sodium benzoate (E 211)
2016
A so far unknown low temperature polymorph (form II crystallized at 350 °C) of the common food preservative sodium benzoate (NaBz; E 211) could be crystallized by annealing (7 days) of the poorly crystalline technical material. Its crystal structure was solved by indexing a tiny single crystal by electron diffraction followed by structure solution and refinement applying powder X-ray diffraction (PXRD). The new polymorph shows many structural similarities to form I (crystallized at 420 °C). Both form I and II are the result of a microphase separation: the structures consist of pseudo-hexagonal packings of rod-shaped micelles where the core consists of sodium cations being coordinated by the…
Pollutants in indoor environments
2014
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Jacopo Salemi: un modello ligneo per il monastero di San Nicolò l'Arena a Catania
2014
Jacopo Salemi, architetto e scultore proveniente dalla città di Castrogiovanni, il giorno 8 novembre 1563 a Catania, sottoscrive un contratto con la congregazione dei monaci benedettini per la costruzione di un modello in legno della chiesa San Nicolò l’Arena che si stava costruendo dal 1558 sul confine ovest della città. Il documento che regola l’incarico tra Salemi e i benedettini è datato 24 febbraio 1564 ed è custodito presso l’Archivio di Stato di Catania; tale documento rivela che il modello realizzato da Salemi sarebbe stato valutato da due esperti incaricati provenienti dalla città di Messina. Le ragioni di una tale commissione potrebbe essere stata connessa alla necessità di verifi…
Multi-technical approach for the characterization of polychrome decorative surfaces at Spanish Mission Churches in Nueva Vizcaya (Chihuahua, Mexico)
2020
An interdisciplinary and multi-institutional group of science and art conservation specialists has provided new insight into the painting materials used in the polychrome walls and wooden ceilings in four seventeenth century Spanish colonial churches of Nueva Vizcaya (Chihuahua, Mexico). A multi-analytical study of the decorative surfaces was performed in situ using spectroscopic approaches (XRF, FORS), False Colour Infrared Reflectography – IRFC, as well as micro sampling for ATR-FTIR, LM and GC/MS laboratory analyses. A survey of natural resources were also studied by ATR-FTIR and LM to elucidate the natural occurrence of a select number of materials found in the surrounding areas of the …
EL USO DE RECURSOS NATURALES LOCALES EN LA PRODUCCIÓN DE SUPERFICIES PICTÓRICAS DECORATIVAS EN TEMPLOS JESUITAS DE LA NUEVA VIZCAYA (CHIHUAHUA, MÉXIC…
2017
Triplet exciplexes as energy transfer photosensitisers
2006
Experimental evidence is provided for the occurrence of triplet–triplet energy transfer from benzoylthiophene–indole exciplexes to naphthalenes with a remarkable stereodifferentiation; chiral recognition is also observed in the decay of the generated naphthalene triplets. Perez Prieto, Julia, Julia.Perez@uv.es ; Galian, Raquel Eugenia, Raquel.Galian@uv.es ; Morant Miñana, Maria Carmen, Maica.Morant@uv.es
Organic matter quantity and quality, metals availability and foraminiferal assemblages as environmental proxy applied to the Bizerte Lagoon (Tunisia)
2016
International audience; This study analyzes the benthic trophic state of Bizerte Lagoon (Tunisia) based on the total organic matter and the bioavailability of biopolymeric carbon including proteins (PTN), carbohydrates (CHO), lipids (LIP), chlorophyll a, as well as bacteria counts. The overall simultaneously extracted metals (SEM), and acid volatile sulfides (AVS) as well as the SEM/AVS ratio indicative of the toxicity of the sediments also were analyzed aiming to study their impact in the dimension, composition and structure of both dead and living benthic foraminiferal assemblages.In the studied sites TOC content is relatively high and the PTN/CHO values indicate that they can be consider…