Results 11 to 20 of about 946 (211)
Preparation of Hierarchically Structured Perlite NPs/Metformin-Co (II) System to Catalyze the Green Synthesis of Pyrazolopyranopyrimidines. [PDF]
ChemistryOpenThis study presents an innovative heterogeneous nanocatalytic system based on perlite nanoparticles (Perlite NPs/Met‐Co(II)). Comprehensive characterization using FTIR, XRD, field‐emission scanning electron microscopy, EDX, elemental mapping, TGA, and BET analyses confirms the hierarchically structure of nanocatalyst.
Shurbakhlu JR, Moradi L, Dehghani A.
europepmc +2 more sources
Journal of Lithic Studies, 2018 The aim of this paper is to report the first analyses carried out on obsidian artifacts recovered from two archaeological sites of the Tafí valley (Tucumán, Argentina), dating to the first and second millennium C.E.
Juan Manuel Montegú +2 more
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Journal of Lithic Studies, 2017 Edited by Carolyn D. Dillian (Coastal Carolina University), Twenty-Five Years on the Cutting Edge of Obsidian Studies: Selected Readings from the IAOS Bulletin consists of 19 previously published articles from the International Association for Obsidian ...
Sean Dolan
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Quaternary Science Advances, 2023 Eastern Africa's Plio-Pleistocene palaeoanthropological record has shaped our understanding of human biological and cultural evolution. Over the years, raw material sourcing has emerged as an important research topic in lithic analysis as it can allow ...
Julien Favreau
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Procurement and circulation of obsidian in the province of La Pampa, Argentina
Journal of Lithic Studies, 2018 The goal of this study is to report the progress regarding the procurement and circulation of obsidian by hunter-gatherer populations during the Late Holocene in the province of La Pampa, Argentina.
Monica Alejandra Berón +2 more
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Chemometric analysis of Mesoamerican obsidian sources [PDF]
Quaternary International, 2019 Abstract We propose a combination of portable X-ray fluorescence (pXRF) and chemometrics to discriminate between Mesoamerican obsidian sources and to assign archaeological artifacts of unknown origin to their respective deposits using a procedure that does not require any type of calibration or reference standards.
Pedro Lopez-García +2 more
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Open Archaeology, 2017 Obsidian sourcing studies have been conducted in the central Mediterranean for more than 50 years. Detailed studies have been done on the geological sources on four Italian islands, and many analytical methods have been used to successfully distinguish ...
Tykot Robert H.
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Journal of Lithic Studies, 2020 From the Neolithic, foreign siliceous materials were imported into Corsica as the island lacks local chert and obsidian. Such a context constitutes a real opportunity to investigate the relationship of the island with surrounding areas, in perspective ...
Céline Leandri, Paul Fernandes
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Procurement at the Chivay obsidian source, Arequipa, Peru [PDF]
World Archaeology, 2011 Abstract Results of survey and test excavations at the Chivay obsidian source in highland Peru found evidence of use of the source area throughout much of the prehispanic past. An examination of a quarry pit and workshop suggest that quarrying and workshop production intensified at the end of the Preceramic period in the region.
Tripcevich, Nicholas, Mackay, Alex
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Internet Archaeology, 2009 Obsidian artefacts from Domuztepe (a large late Neolithic site in the Kahramanmaraş plain in south-east Turkey belonging to the Halaf culture and dated to c. 6000-5500 cal.
Elizabeth Healey , Stuart Campbell
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