Results 1 to 10 of about 633 (178)
The blue road: Provenance study of azurite samples from historical locations through the analysis of minor and trace elements [PDF]
Heliyon, 2023 The pigments used by artists since ancient times play an important role in historical, artistic, and cultural investigations. They allow the acquisition of useful information for the study of human and technological development.
Laura Medeghini +2 more
exaly +4 more sources
Ammonium–Amine Co-Activation: Promoting the Sulfurization of Azurite and Its Effect on Xanthate Adsorption [PDF]
Molecules, 2023 Enhanced sulfurization has always been the focus of research on the flotation of copper oxide minerals. In this study, combined ammonium–amine salts were innovatively applied to improve the sulfurization of azurite.
Chao Su +3 more
doaj +2 more sources
Biodeterioration effects of three Aspergillus species on stucco supported on a wooden panel modeled from Sultan al-Ashraf Qaytbay Mausoleum, Egypt [PDF]
Scientific Reports, 2023 This study focuses on the magnificent decoration of a painted and gilded wooden panel with signs of fungal biodeterioration caused by Aspergillus species in the Mausoleum of Sultan al-Ashraf Qaytbay, Cairo, Egypt.
Hala A. M. Afifi +3 more
doaj +2 more sources
International Journal of Mining Science and Technology, 2021 In this work, the growth of copper sulfide crystal onto azurite surfaces during sulfurization and its response to flotation are investigated. Filed emission scanning electron microscopy-energy dispersive X-ray spectroscopy (FESEM) and X-ray diffraction ...
Jinpeng Cai +2 more
exaly +3 more sources
Multi-Analytical and Non-Invasive Approach for Characterising Blackened Areas of Originally Blue Paints [PDF]
MoleculesAzurite, a natural mineral pigment consisting of basic copper carbonate (2CuCO3·Cu(OH)2), is one of the Middle Ages’ most common blue pigments. Why paintings originally coated with azurite appear blackened today remains debated.
Maria Labate +5 more
doaj +2 more sources
Kinetic aspects of malachite deposition on marble from copper lactate solutions
Comptes Rendus. Chimie, 2023 Experiments were conducted to study the formation of copper minerals on carbonate material (marble) from lactate solutions. Main kinetic parameters were estimated from the curves of copper ions deposition.
Gogol, Daniil B. +4 more
doaj +1 more source
Rudarsko-geološko-naftni Zbornik, 2023 One of the main challenges in the copper oxide processing industry is the application of flotation to reduce operating costs. Sulfidation-flotation is a commonly employed approach for floating oxide minerals using sulfidizers in order to sulfide the ...
Hassan Maleki +4 more
doaj +1 more source
Iraqi Geological Journal, 2022 The Merija copper deposit is located in the Marginal Folds of the Moroccan Eastern High Atlas. It is a stratiform deposit hosted in sandstone-conglomerate formations of the Infra-Cenomanian, consisting of copper carbonate and sulphide ...
Mostapha Bouzekraoui +7 more
doaj +1 more source
Heritage Science, 2022 Murals of Cave 256, Mogao Grottoes consist of several layers, with the outermost layer overlays all others. The bottom layer was painted in the five dynasties. The outermost layer was mural of the Song Dynasty. Statues were repainted in the Qing Dynasty.
Biwen Shui +6 more
doaj +1 more source
A Case Study on Distribution of Gemstone in Bela Ophiolite, District Khuzdar, Balochistan
International Journal of Economic and Environment Geology, 2022 Bela Ophiolite and suture zone host several types of gemstones in the underlain and overlain rocks such as garnet (demantoid and almandine), quartz, brucite, malachite, chrysocolla, azurite, calcite, natrolite, green chert, jasper, serpentine, agate ...
Salman Khan +5 more
doaj +1 more source