1,721,022 research outputs found
Molecular techniques applied to the study of microbial communities colonising different lithotypes.
No full text
Thin Lead Sheets in the Decorative Features in Pavia Charterhouse
No full textThe facade of the church of the Pavia Charterhouse, built at the end of the 15th century, shows outstanding decorative features made of different stone materials, such as marbles, breccias and sandstones. Magnificent ornamental elements are made of thin lead sheets, and some marble slabs are inlaid with them. Metal elements are shaped in complex geometric and phytomorphic design, to form a Greek fret in black contrasting with the white Carrara marble. Lead pins were fixed to the back of the thin lead sheets with the aim of attaching the metal elements to the marble; in so doing the pins and the lead sheets constitute a single piece of metal. In some areas, lead elements have been lost, and they have been substituted with a black plaster, matching the colour of the metal. To the authors' knowledge, this kind of decorative technique is rare, and confirms the refinement of Renaissance Lombard architecture. This work reports on the results of an extensive survey of the white, orange and yellowish layers, which are present on the external surface of the lead. The thin lead sheets have been characterized and their state of conservation has been studied with the aid of Optical Microscopy, SEM-EDS, FTIR and Raman analyses. Lead sulphate, lead carbonates and oxides have been identified as decay products
Proposta di metodo per la raccolta e la gestione dei dati sui materiali da costruzione negli strumenti di pianificazione per i centri storici. il caso di Palazzolo Acreide
No full textLo studio, pluridisciplinare, fa parte di un progetto Murst indirizzato al progetto di un sistema informativo per la gestione dei piani di recupero di centri antichi.
Nello specifico, partendo da uno dei casi campione assunti, il centro storico di Palazzolo Acreide, partendo da rilievi, studi e più specifiche caratterizzazioni, si sono voluti mettere in evidenza alcuni caratteri e denominatori comuni utile alla conoscenza per la gestione e la pianificazione dei lavori nei centri storici
- …
