Cuneiform tablets tell the life and culture of Sumerian people in a sort of black and white tale because of the binary engraving technique. A leading question arises: did Mesopotamian people apply some kind of colour to decorate their tablets or to put emphasis on selected words? Some administrative and literary Sumerian cuneiform tablets of mid-third Millennium B.C. from the site of Kish (cent...

A micro-Raman spectroscopy study of a multi-coloured (yellow, blue, white, redish-brown and brown-black) tile shard from the Citadel of Algiers was undertaken. XRD and EDX were used as complementary techniques. The study shows that the heterogeneous three-shade yellow pigment on the tile is composed largely of the ancient ternary (Pb-Sn-Sb) pyrochlore oxide with a dominant Pb-O vibration at 127...

Barium stannate titanate (BaTi0.89Sn0.11O3, BTS11) is one of the reported lead-free materials that exhibit high dielectric and piezoelectric properties near ambient temperature. In this work, BTS11 powders were elaborated via a soft chemistry method at very low temperatures using two synthesized approaches combining sol-gel hydrothermal processes. first approach, effect barium precursor on puri...

In this work, we have studied the methods of electrochemical processing materials in order to give them new functional properties. Experimental data on production corrosion-resistant coatings based Zn-Ni and Zn-Co alloys from ammonium oxalate electrolytes study their protective properties are presented. The questions carbon nanomaterials by anodic exfoliation graphite sulfuric acid considered. ...

Aim: The aim of this study was to evaluate the influence of acrylic resin immersion in different mouthwashes on hardness, roughness and color. Methods: Specimens of an orthodontic selfcured acrylic resin (Orto Clas®) were produced and immersed in five mouthwashes: Plax® Classic (Colgate®); Plax® alcohol-free (Colgate®); Listerine® (Johnson & Johnson®); Periogard® (Colgate®) and Periogard® alcoh...

Layered Eu-doped SnO₂ ordered nanoarrays constructed by nanorods with 10 nm diameters and several hundred nanometers length were synthesized by a substrate-free hydrothermal route using alcohol and water mixed solvent of sodium stannate and sodium hydroxide at 200 °C. The Eu dopant acted as a crystal growth inhibitor to prevent the SnO₂ nanorods growth up, resulting in tenuous SnO₂ nanorods ord...

Tiyol bileşiklerinin biyolojik öneme sahip olması son yıllarda bu bileşiklere olan ilgiyi artırmıştır. bileşiklerinden elde edilen tiyoester, tiyoeter ve disülfid bileşikleri altın, gümüş, demir, cıva, kadmiyum, çinko gibi metalleri seçimli olarak bağlamaktadır. Bu sebeple komplekslerin lüminesans, güneş pilleri panelleri, katalizör sistemleri, adsorbanlar, fotovoltaik hücreler, vb. birçok kull...