Results 211 to 220 of about 343,754 (314)

Fecal Steroids as Tracers of Human Population and Waste Management Practices at the Ancient Maya City of Ucanal, Guatemala

Archaeometry, EarlyView.
ABSTRACT Geochemical data compiled from dried sediments from three water reservoirs at the ancient Maya city of Ucanal, Petén, Guatemala, reveal low to undetectable fecal biomarker concentrations. These low concentrations may be the result of the aerobic decay of sterols combined with well‐managed waste disposal practices.
Jean D. Tremblay, Peter M. J. Douglas, Christina T. Halperin, Yves Gélinas   +3 more
wiley   +1 more source

Acid Dissolution-Induced Damage Mechanisms in Concrete-Rock Composites: Experimental and Particle Flow Simulation. [PDF]

ACS Omega
Chen H, Du B, Shen M, Wang J, Li Y.
europepmc   +1 more source

Petroleum Developments in Cooke County [PDF]

, 1927
Bullard, Fred M., Bybee, H.P., Hawtof, E.M.   +2 more
core  

Edge Sharpness Does Not Vary Between Palaeolithic Flake Technologies, With the Possible Exception of Levallois Débitage

Archaeometry, EarlyView.
ABSTRACT Investigating why hominins adopted particular flake technologies during the Mid‐to‐Late Pleistocene is essential to understanding patterns of lithic innovation. This period witnessed the emergence of Levallois technologies (~350–250 ka) and later blades, each “replacing” earlier forms.
Anna Mika, Alastair Key
wiley   +1 more source

Migration and Evolution of Geothermal Fluids in Karst Reservoirs and Geothermal Energy Development Model: A Case Study. [PDF]

ACS Omega
Pei S, Sun Z, Yu K, Wan Z, Zhao S, Zhen Z, Chen Z.   +6 more
europepmc   +1 more source

Response of Remote Tropical West Pacific Islands to Climate Variability: A Multiproxy Record From T‐Lake, Palau, Spanning the Early Holocene to Present

Archaeometry, EarlyView.
ABSTRACT Lake sediments are natural archives of past environmental dynamics and how these systems have responded to past climate variability. Sediment geochemistry, governed by local geology and climate processes, is unique to each lake‐catchment and geochemical proxies must be validated for each study site.
Jalene Nalbant, Larissa Schneider, Jessica L. Blois, Matthew Wolhowe, Julian P. Sachs, Simon G. Haberle, Geoffrey Clark   +6 more
wiley   +1 more source

Optimizing grout formulations for post-tensioning using pozzolanic and filler blends. [PDF]

Sci Rep
Ibrahim S, Shamseldein A, Sokairge H, Elshafie H.   +3 more
europepmc   +1 more source

The Material Basis of 18th‐Century Meissen Porcelain

Archaeometry, EarlyView.
ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley   +1 more source

Complete genome sequence of the calcite-precipitating bacterium <i>Cytobacillus kochii</i> strain ITBMC_116, isolated from a limestone karst in Vietnam. [PDF]

Microbiol Resour Announc
Vu TM, Le LQ, Luc TM, Do KHD, Nguyen DH, Tran KT, Vu NTT, Nguyen DH.   +7 more
europepmc   +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, Michela Spataro, Jonathan Taylor, Gianfranco Ulian, Giovanni Valdré, Gabriele Giacosa, Eleonora Mariani, Nicolò Marchetti   +7 more
wiley   +1 more source