Results 61 to 70 of about 1,550 (205)
From freshwater inflows to salt lakes and salt deposits in the Qaidam Basin, W China
Swiss Journal of Geosciences, 2023 The Qaidam basin in W China is an immense hyperarid intramontane basin with flat vast playas and salt lakes on the Qinghai-Tibet Plateau. The central basin is about 2800–2900 m a.s.l.
I. Stober, J. Zhong, K. Bucher
doaj +1 more source
A Newly Discovered Tablet‐Making Facility in Nineveh: Insights From Scientific Analysis
Archaeometry, EarlyView.ABSTRACT This paper addresses the question of tablet technology in the Neo‐Assyrian capital city of Nineveh. Recent excavations in the lower town of Nineveh by the Iraqi–Italian Archaeological Expedition uncovered an exceptional assemblage of more than 200 tablets from an elite residence that appears to have included a scriptorium.
Mathilde Jean +7 more
wiley +1 more source
Effect Of Thermal Treatment Of Trepel At Temperature Range 800-1200˚C
Open Chemistry, 2019 Trepel is the local name for a mixture of diatomaceous earth and clay minerals. It represents a greyish, soft, very light, weakly cemented, fine biogenetic sedimentary rock.
Reka Arianit A. +6 more
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Archaeometry, EarlyView.ABSTRACT This study shows an innovative approach to determine the origin of some Calabrian rocks quarried used in ancient times. Twenty‐five quarries, distributed in all the Calabrian provinces (Southern Italy), were studied and sampled. Ten samples were taken from each quarry, for a total of 250 samples.
Domenico Miriello +5 more
wiley +1 more source
Talc‐Tempered Pottery From Bala Hissar, Kabul: An Analytical Study
Archaeometry, EarlyView.ABSTRACT Potsherds of cooking ware excavated at Bala Hissar archaeological site in Kabul were studied using X‐ray fluorescence (XRF), scanning electron microscope‐energy dispersive X‐ray spectrometry (SEM‐EDS), Raman spectroscopy, X‐ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and optical microscopy.
Parviz Holakooei +4 more
wiley +1 more source
Soils and sediments of Prošće Lake catchment as a possible terrigenous input in the lakes system
Acta Carsologica, 2020 The Plitvice Lakes National Park is in the northwestern part of the Dinaric Karst in central Croatia. An important role of the soil in the karst is to purify the waters before they reach the phreatic zone.
Anita Ptiček Siročić +3 more
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Archaeometry, EarlyView.ABSTRACT The following paper investigates ceramic production and signs of specialization in Rome and the wider region during the early first millennium bce, through an archaeometric approach using Instrumental Neutron Activation Analysis (NAA), and complementary techniques.
Mattia D'Acri +4 more
wiley +1 more source
Unraveling the active site cover of coproheme decarboxylase from Listeria monocytogenes
The FEBS Journal, EarlyView.During heme biosynthesis in Gram‐positive bacteria, coproheme decarboxylase (ChdC) catalyzes the conversion of four‐propionate substrate coproheme to the two propionate product heme b. Its active site is universally covered by a flexible linking loop. This study identifies an important histidine residue, which stabilizes the loop in a ChdC homolog.
Nikolaus Falb +4 more
wiley +1 more source
Doppelschichtstrukturen mit brucitähnlichen Schichtionen [Me(II)1-xMe(III)x(OH)2)x+
CHIMIA, 1970 By introducing trivalent ions Me3+ into brucite-like layers Me(II)(OH)2, layer ions [Me(II)1-xMe(III)x(OH)2)x+ can be obtained. In these layer ions the charge compensation of an O2--ion by the metal ions is in the average 1+x/2 , leaving only a bond ...
Rudolf Allmann
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Appraisal of Six Natural Mica Reference Materials for In Situ Rb‐Sr Geochronology
Geostandards and Geoanalytical Research, EarlyView.Key Points Evaluated six natural mica reference materials for in situ LA‐ICP‐MS/MS Rb‐Sr geochronology using geochemical, microstructural and isotopic characterisation. Identified robust primary reference materials: Mount Dromedary biotite (99.37 Ma) and Mica‐Fe biotite (307.75 Ma). La Posta biotite and Högsbo muscovite are suitable secondary reference
Hugo K.H. Olierook +38 more
wiley +1 more source