Highly transparent poly(2-ethyl-2-oxazoline)-TiO2 nanocomposite coatings for the conservation of matte painted artworks

A nanocomposite coating based on TiO2 nanoparticles and poly(2-ethyl-2-oxazoline) is used as consolidant of matte painted surfaces (temperas, watercolors, modern paintings). The aim of this work is to provide advances in the conservation of these works of art, while preserving their optical appearance, in terms of colour and gloss. Fiber Optic Reflectance Spectroscopy (FORS) measurements of a painting-model (an acrylic black monochrome) treated with the nanocomposite coatings revealed that it is possible to match the optical appearance of the painted surface by tuning the amount of nanoparticles in the polymeric matrix. The requirement of retreatability of the material has been verified by removing the nanocomposite cast on the painted surface with aqueous solutions. FTIR and SEM/EDX measurements showed that almost no traces of the nanocomposite remained on the painted surface, allowing its use for the treatment of real paintings. Test were performed using a contemporary studio-model on canvas attributed to Agostino Bonalumi (1935–2013)

Soil corrosion of the AISI1020 steel buried near electrical power transmission line towers

Soil corrosion of carbon steel samples buried up to hundred days close to a high voltage power transmission line tower was examined by weight loss vs. time. A higher weight loss was observed if the samples were electrically connected to the tower than if they were not. This was attributed to the influence of alternating current (AC) signals induced in the soil by the transmission line. This field study showed for the first time the influence of the AC power line on the buried structure of the tower, while other studies so far were focused only on AC corrosion of cathodically protected coated pipelines, running parallel to the transmission line. An improved method was used to measure weight loss by descaling in Clark solution. The new method substitutes discontinuous measurements, proposed in the ASTM-G1-90 standard, by in situ measurements of the weight loss during descaling, using a computer controlled microbalance

Observations sur le genre Onthophagus Latr. VIII. Note homonymique

Goidanich A. Observations sur le genre Onthophagus Latr. VIII. Note homonymique. In: Bulletin de la Société entomologique de France, volume 31 (3-4),1926. pp. 39-40

Observations sur le genre Onthophagus Latr. VIII. Note homonymique

Goidanich A. Observations sur le genre Onthophagus Latr. VIII. Note homonymique. In: Bulletin de la Société entomologique de France, volume 31 (3-4),1926. pp. 39-40

Observations sur le genre Onthophagus Latr. VII. Onthophagus Falzonii, n. sp.

Goidanich A. Observations sur le genre Onthophagus Latr. VII. Onthophagus Falzonii, n. sp.. In: Bulletin de la Société entomologique de France, volume 31 (3-4),1926. pp. 37-39