Characterization of building stones from the ancient Tyana aqueducts, Central Anatolia, Turkey: implications on the factors of deterioration processes

2016 ◽  
Vol 77 (1) ◽  
pp. 237-252 ◽  
Author(s):  
Mustafa Korkanç
Minerals ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 663 ◽  
Author(s):  
Scrivano ◽  
Gaggero ◽  
Volpe

Fifty-four pieces out of 356 marble pieces deriving from the decorative and architectonic apparatus of the medieval monastic complex of S. Francesco of Castelletto (Genoa, Italy) preserve traces of varicolored paint layers. Microscopic samples of green, blue, red, pink, white, and yellow paint relics were collected by scalpel and analyzed by means of Scanning Electron Microscope coupled with Energy Dispersive Spectroscopy (SEM-EDS), µ-Raman, and Fourier Transform Infra-Red Spectroscopy with Attenuated Total Reflection (FTIR-ATR), to characterize pigments and binders. The combined results from the different techniques allowed verification that stone decoration in Genoa during the Middle Ages encompassed a calcite groundwork and the use of a mixture of oils and proteins (probably egg) to apply pigments. The assemblage of impurities within the pigment has been correlated with the provenance sites along the commercial continental (Hungary and France) and maritime (Sardinia, Cyprus, or Veneto) routes between the 13th and 15th centuries. Moreover, the investigation of the painted layer improved the characterization of the decorative techniques in use in Genoa during the Middle Ages.


2018 ◽  
Vol 64 ◽  
pp. 49-54
Author(s):  
Zuhal Onder ◽  
Onder Duzlu ◽  
Alparslan Yildirim ◽  
Arif Ciloglu ◽  
Mubeccel Okur ◽  
...  

2009 ◽  
Vol 103 (3-4) ◽  
pp. 76-83 ◽  
Author(s):  
V. Cnudde ◽  
A. Cwirzen ◽  
B. Masschaele ◽  
P.J.S. Jacobs

Author(s):  
Adnan Ünlan ◽  
Ethem Akyol

In this study, some biochemical characteristics (total protein, total RNA, Catalase: CAT enzyme activity and malondialdehyde: MDA level) of Italian bee (A. m. ligustica) and Caucasian bee (A. m. caucasica), and Muğla and Anatolian bees (A. m. anatolica) from local honey bee races were investigated comparatively. Laboratory analyzes of biochemical characteristics were performed on worker bees aged 24 days old with 10 repetitions using appropriate methods informed in the literature. The amounts of total protein of bee races given above were 18.39±1.28, 20.71±0.63, 18.56±1.24 and 20.95±2.15 g/dL, respectively; the amounts of total RNA were 11.46±0.18, 12.10±0.26, 11.87±0.20 and 12.27±0.26 µg/µL, respectively; the CAT activities were 4.59±0.46, 5.12±0.67, 4.88±0.48 and 5.25±0.53 kU/g P, respectively; the levels of MDA were 0.52±0.04, 0.50±0.04, 0.48±0.02 ve 0.43±0.05 mmol/mg, respectively. Variance analysis showed that statistically significant differences among races in terms of the all characteristics examined. The results of CAT activity which is one of the indicators of antioxidant defense system, and levels of MDA which is an indicator of peroxidation of membrane lipids; and similarly total amount of protein also includes various proteins such as antioxidants and enzymes; it can be said that the Anatolian and Caucasian bee races (due to higher total protein, total RNA and CAT activities, and lower MDA level) are more resistant to various negative environmental factors (e.g. climate, flora, pesticide, etc.) than the Muğla and Italian bee races in the conditions of the Central Anatolia Region; there are significant differences between the bee races in terms of amounts of total RNA and this parameter can be also used in the characterization of bee races.


Author(s):  
Ender Keskinkilic ◽  
Saeid Pournaderi ◽  
Ahmet Geveci ◽  
Yavuz A. Topkaya

2005 ◽  
Vol 61 (11-12) ◽  
pp. 2460-2467 ◽  
Author(s):  
S.S. Potgieter-Vermaak ◽  
R.H.M. Godoi ◽  
R. Van Grieken ◽  
J.H. Potgieter ◽  
M. Oujja ◽  
...  

1997 ◽  
Vol 3 (3) ◽  
pp. 269-292 ◽  
Author(s):  
S. Siegesmund ◽  
A. Vollbrecht ◽  
K. Ullemeyer ◽  
R. Sobott

Abstract In geology, methods of fabric analyses are largely applied in order to reconstruct the rock-forming processes and define the environments in which they formed. Often, rocks are characterized by polyphase imprints, which occured over a long time span under varying conditions (pressure, temperature, chemical environmentj. In these cases, the final fabrics are usually rather complex. The Kauffung marble is used as an example to demonstrate, how the methods of geological fabric analyses can be applied to the characterization of natural building stones. A correlation with petrophysical analyses reveals that the most important fabric parameters are crystallographic-preferred orientation (texture), the shape-preferred orientation and the microcrack populations, which are usually responsible for a distinct anisotropy. They mainly control the directional dependence of the material properties. These anisotropic properties should be considered during the cutting and later use of natural building stones.


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