Biomolecular sensing using surface micromachined silicon plates

Micromachined sensors to detect surface stress changes associated with interactions between an immobilized chemically selective receptor and a target analyte are presented. The top isolated sensing surface of a free-standing silicon plate is prepared with a thin Au layer, followed by a covalent attachment of chemical or biomolecule forming a chemically-selective surface. Surface stress changes in air are measured capacitively due to the formation of an alkanethiol self-assembled monolayer (SAM). Detection of biomolecular binding in liquid samples is measured optically using the streptavidin-biotin complex and AM. tuberculosis antigen-antibody system used for clinical tuberculosis (TB) diagnosis

The changing landscape of Constanciacus: a lost settlement in the Lagoon of Venice

« Costanziaco Project » is an interdisciplinary, multi-period archaeological project focused on the study of an ancient settlement in the Northern Lagoon of Venice, known in Medieval and later documentary sources as Costanciacus (Cottica et al., 2008). The project has been promoted by the Department of Antiquity and the Near East of the University of Venice and by the Superintendence for the Archaeological Heritage in the Veneto region. In Antiquity Costanciacus comprised two islands, S. Aria..

The changing landscape of Constanciacus: a lost settlement in the Lagoon of Venice

« Costanziaco Project » is an interdisciplinary, multi-period archaeological project focused on the study of an ancient settlement in the Northern Lagoon of Venice, known in Medieval and later documentary sources as Costanciacus (Cottica et al., 2008). The project has been promoted by the Department of Antiquity and the Near East of the University of Venice and by the Superintendence for the Archaeological Heritage in the Veneto region. In Antiquity Costanciacus comprised two islands, S. Aria..

Remote sensing applications and archaeological research in the Northern Lagoon of Venice : the case of the lost settlement of Constanciacus

'Vicus Constanciacus' is a project for the recovery, protection and evaluation of the historical and archaeological heritage of Constanciacus, an ancient small group of islands in the Northern Lagoon of Venice, of which currently just two emerged strips survive, namely: the abandoned islands of Sant'Ariano and La Cura. Exploring the area lying between the mainland and the lagoon represents an important opportunity for reconstructing the history of Venice before the well known medieval city and market arose. Through survey and excavations of the Constanciacus area, the project aims to shed new light on early patterns of occupation in the Northern Venetian Lagoon; to explore the communication network between the mainland and the sea; and to examine the evolution of settlements along the commercial routes of the Lagoon through time. The particular research environment of the Lagoon requires a close collaboration between archaeologists and scientists of differing expertise. Remote sensing (RS) in this case is critical for investigating the ancient extent and geomorphology of the ancient islands. Aerial photographs, (both vertical and oblique), and HR satellite images, are being used to identify past traces of occupation that nowadays are buried below earth surface or under the shallow waters of the Lagoon. Visual analysis of the remotely sensed data is supported by enhancement and processing techniques that emphasize the presence of anomalies of the terrain and vegetation that can be related to archaeological structures.11 page(s

Remote sensing applications and archaeological research in the Northern Lagoon of Venice: the case of the lost settlement of Constanciacus

'Vicus Constanciacus' is a project for the recovery, protection and evaluation of the historical and archaeological heritage of Constanciacus, an ancient small group of islands in the Northern Lagoon of Venice, of which currently just two emerged strips survive, namely: the abandoned islands of Sant'Ariano and La Cura. Exploring the area lying between the mainland and the lagoon represents an important opportunity for reconstructing the history of Venice before the well known medieval city and market arose. Through survey and excavations of the Constanciacus area, the project aims to shed new light on early patterns of occupation in the Northern Venetian Lagoon; to explore the communication network between the mainland and the sea; and to examine the evolution of settlements along the commercial routes of the Lagoon through time. The particular research environment of the Lagoon requires a close collaboration between archaeologists and scientists of differing expertise. Remote sensing (RS) in this case is critical for investigating the ancient extent and geomorphology of the ancient islands. Aerial photographs, (both vertical and oblique), and HR satellite images, are being used to identify past traces of occupation that nowadays are buried below earth surface or under the shallow waters of the Lagoon. Visual analysis of the remotely sensed data is supported by enhancement and processing techniques that emphasize the presence of anomalies of the terrain and vegetation that can be related to archaeological structures.11 page(s

Recent advances in protective coatings for cultural heritage-an overview

In the last decades, the interest in the development of protective coatings for movable and immovable Cultural Heritage (CH) assets has decidedly increased. This has been mainly prompted by the raising consciousness on preservation requirements for cultural artefacts and monuments, which has consequently determined the development of new protective products. From acrylic resins used at the end of the last century to the up-to-date biomaterials and nanoparticles employed nowadays, the research has made a giant step forward. This article reviews the progresses, the technical challenges, and the most recent advances in protective coatings for archaeological metal, glass, and stone artefacts. It aims at offering a comprehensive and critical overview of the progressions in conservation science and displaying how research has optimized polymers in order to solve deterioration problems. Attention is given to recently developed materials, hybrid coatings, and corrosion inhibitors. This work seeks to provide a reference point for future research and to offer a wide-ranging introduction on the newly available material technologies to restorers and conservators

Speed bleaching : the importance of temporary filling with hermetic sealing

The aim of this study was to demonstrate the influence of an adhesive temporary restoration on the effectiveness of the bleaching reaction, regardless of the concentration of the bleaching agent used. Every clinician involved in conservative dentistry understands the incompatibility between 'chemical bond' and 'oxygen.' This awareness often influences clinicians to decide on a temporary 'mechanical retention' filling that is unable to prevent the escape of oxygen ions, forcing the patient into more sessions and therefore raising the risk of complications. The scientific rationale behind the procedure described in this article is based on the bonding capacity of the coronal seal to maintain the rapid dissociation of the hydrogen peroxide exclusively within the pulp chamber, inducing an increase in the internal pressure and a consequent penetration of the oxygen-free radicals directly inside the dentinal tubules. In fact, avoiding the spontaneous dissipation of the oxygen-free radicals in the external environment may limit their effectiveness. This study aimed specifically to prove that it is possible to obtain a rapid bleaching reaction by observing a protocol based on the 'walking bleach' technique, specifically modified not so much by the typology of the mixture used but by fully exploiting the reaction yield of the hydrogen peroxide disproportionation. The results of the documented clinical cases presented here show the effectiveness of this method, which is achieved in a single session, therefore decreasing the possibility of the several operating phases that are necessary with the traditional procedure