Petrographic Characterization of Late Roman African Pottery from J.W. Salomonson’s Surveys: 3. The Workshops of Henchir el Biar and Bordj el Djerbi

2021 ◽  
pp. 209-222
Author(s):  
Carina Hasenzagl ◽  
Claudio Capelli
Keyword(s):  
Late Roman

Material characterization of the Late Roman wall painting samples from Sinop Balatlar Church Complex in the black sea region of Turkey

2016 ◽  
Vol 126 ◽  
pp. 263-273 ◽  
Author(s):  
Meriç Bakiler ◽  
Burcu Kırmızı ◽  
Özden Ormancı Öztürk ◽  
Özge Boso Hanyalı ◽  
Emine Dağ ◽  
...  
Keyword(s):  
Black Sea ◽  
Material Characterization ◽  
Wall Painting ◽  
The Black Sea ◽  
Black Sea Region ◽  
Roman Wall Painting ◽  
Late Roman

scholarly journals Multianalytical characterization of Late Roman glasses including nanosecond and femtosecond laser induced breakdown spectroscopy

2015 ◽  
Vol 30 (7) ◽  
pp. 1590-1599 ◽  
Author(s):  
M. Oujja ◽  
M. Sanz ◽  
F. Agua ◽  
J. F. Conde ◽  
M. García-Heras ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Induced Fluorescence ◽  
Laser Induced Breakdown Spectroscopy ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Late Roman

Nanosecond and femtosecond laser induced breakdown spectroscopy, X-ray fluorescence, ultraviolet-visible spectroscopy and laser induced fluorescence were combined for the analysis of Late Roman glasses.

scholarly journals Archaeometric Characterization of Obsidian Artifacts at Casa dei Francesi (Ustica Island, Italy) and Clues of a Hidden Prehistoric Settlement

2020 ◽  
Vol 6 (1) ◽  
pp. 236-247
Author(s):  
Franco Foresta Martin ◽  
Felice Larocca ◽  
Francesca Micheletti ◽  
Mauro Pallara ◽  
Pasquale Acquafredda
Keyword(s):  
Bronze Age ◽  
Scientific Literature ◽  
Agricultural Field ◽  
Show Evidence ◽  
Middle Bronze Age ◽  
Functional Analyses ◽  
Non Destructive ◽  
Non Destructive Techniques ◽  
Late Roman

AbstractAt Ustica island (Palermo, Italy), in the area of Casa dei Francesi, 119 fragments of obsidian artifacts were collected on the surface of an agricultural field at an altitude of 50 m asl. In the same area, until now, scientific literature reports only the presence of late Roman pottery (4th–6th centuries AD), and no evidence has appeared that it could be the site of a prehistoric settlement. The most important prehistoric settlement, the Faraglioni Village (Middle Bronze Age) is located 700 m further north, overlooking the sea. Obsidian provenance analyses, performed on the 119 samples with absolutely non-destructive techniques WD-XRF and SEM-EDS, indicate two sources areas: Lipari (93 samples, 78%) and Pantelleria (26 samples, 22%). Concerning the obsidians from the island of Pantelleria, it was possible to also establish the sub-source of Salto la Vecchia. The typological and functional analyses of the 119 obsidian fragments point out that 115 are debitages, some of which show evidence of percussion bulbs, and only 4 are tools with micro-retouching. This work focuses on the geochemical and typological characterization of the obsidian assemblage collected, the characteristics of which suggest the existence of a prehistoric settlement in the area of the Casa dei Francesi or nearby.

Characterization of historical inorganic binders and design of restorative materials - case study of the late Roman mosaic

2020 ◽  
Author(s):  
Jonjaua Ranogajec ◽  
Snezana Vucetic ◽  
Maja Frankovic ◽  
Helena Hirsenberger
Keyword(s):  
Contact Zone ◽  
Environmental Conditions ◽  
Good Practice ◽  
Mineralogical Composition ◽  
Archaeological Site ◽  
Inorganic Binder ◽  
Visual Properties ◽  
Late Roman

<p>The design of restorative mortars for historical buildings and artefacts is always a challenging task, with multiple requirements which have to be achieved and harmonized. Essentially, restorative mortars have to comply with chemical, mineralogical and mechanical compatibility criteria, which also include formation of contact zone, tensile strength, porosity and visual properties (colorimetric parameters). One of the successfully restored examples is the mosaic discovered broken in 2014 with severely disturbed positioning of fragments. The mosaic represents head of Medusa dated from Late Roman period and found at the archaeological site in Skelani, Bosnia and Herzegovina.</p><p> </p><p>The case study presented in this abstract is a good practice example of collaboration between restoration and science which shortens the period for attaining relevant inputs and gives confidence to future restoration decisions. The investigation reviled that the mosaic bedding layer was of very good quality and has allowed fragments of various sizes to be preserved (tesselatum, nucleus and even rudus layer on some fragments). The objective of the restoration was to preserve remains of the original bedding layer and to connect and stabilize groups of individual fragments. The idea was to design compatible restoration mortar which will support the requirements for future mosaic presentation.</p><p> </p><p>The characterization of historic inorganic binder samples, performed in the Laboratory for Materials in Cultural Heritage, Faculty of Technology, University of Novi Sad, provided invaluable information about the composition of mosaic bedding layers, their preparation, and moreover about degradation mechanisms in regard to centuries of its use and environmental conditions. It was reviled that the original inorganic binder is a lime based mortar with brick fragments imbedded. A strong bonding with preserved bedding layers of mosaic fragments and a set of specific compatibility objectives framed attempts to design compatible restorative mortar. In the laboratory a set of restorative mortar samples were prepared with similar chemical and mineralogical composition, porosity and visual properties (colorimetric parameters), mechanical properties and formation of contact zone between original and restorative mortar. The laboratory prepared samples were artificially aged in weathering chamber (temperature, humidity, UV/VIS radiation) simulating exposal to real environmental conditions in all four seasons. The weathering regimes were set according to temperature and humidity profiles for the relevant region. Finally, the compatibility of restoration mortar with original one was evaluated and confirmed, what enabled conservators to proceed with restorative works.</p>

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

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