Results 91 to 100 of about 6,655 (229)

Glass from Teniky (Madagascar): Geochemical Evidence for Multiple Production Systems and Long‐Distance Exchange in the Mediaeval Indian Ocean

Archaeometry, EarlyView.
ABSTRACT The inland rock‐cut site of Teniky, located in the Isalo massif of southern Madagascar, represents an exceptional archaeological context recently dated to the 11th–12th centuries ad, corresponding to the early phases of settlement on the island.
Jean Rodier, Bernard Gratuze, Vincent Serneels   +2 more
wiley   +1 more source

Dual conversion pathways for efficient electrochemical extraction of uranium

Nature Communications
The electrochemical extraction of uranium (EEU) from wastewater is of promise to ensure the sustainable development of nuclear power, of which the practical application is limited due to the single uranium species conversion pathway.
Lin Zhao, Gang Wang, Shiyong Wang, Sheng Li, Changping Li, Yuwei Wang, Jieshan Qiu   +6 more
doaj   +1 more source

Evaporitic Chert Provenance: Evaluating Petrographic and Geochemical Workflows for Source Discrimination

Archaeometry, EarlyView.
ABSTRACT Chert tools were widely used in prehistory by human societies due to their knapping suitability and availability, but their relatively uniform composition, especially in evaporitic cherts, complicates sourcing, requiring specialised analytical methods.
Bruno Gómez de Soler, Pablo Rodríguez‐Salgado, Maurice Brodbeck, Judit Bria, Thomas Belgrano, Julian Menuge   +5 more
wiley   +1 more source

A New Comprehensive Model to Simulate and Optimize Fluid Flow in Complex Well‐Formation System for In Situ Leaching Uranium

Energy Science & Engineering
In situ leaching (ISL) is an important method for green and efficient development of sandstone‐type uranium ore. It achieves ISL of uranium through the deployment of injection and extraction vertical well patterns.
Zhaokun Li, Xuebin Su, Yangquan Jiao, Yu Zhang, Yang Qiu, Xiaodong Hu   +5 more
doaj   +1 more source

Enhancement of Extraction of Uranium from Seawater

, 2016
Even at a concentration of 3 μg/L, the world’s oceans contain a thousand times more uranium than currently know terrestrial sources. In order to take advantage of this stockpile, methods and materials must be developed to extract it efficiently, a difficult task considering the very low concentration of the element and the competition for extraction by
Mohamad Al-Sheikhly, Travis Dietz, Zois Tsinas, Claire Tomaszewski, Ileana M. Pazos, Olga Nigliazzo, Weixing Li, Mohamad Adel-Hadadi, Aaron Barkatt   +8 more
openaire   +2 more sources

A Territorial Approach to Transitioning Oil and Gas Producing Regions: Comparative Practices and Prospects for Canada

Canadian Public Administration, EarlyView.
Abstract Oil and gas transitions are relatively new and especially difficult because the sector is large, economically central, and deeply embedded in national energy systems. Territorial approaches—grounded in regional political economies, institutions, and community impacts—offer a politically feasible way to begin meaningful oil and gas transitions ...
Tamara Krawchenko, Sophie Kiernan
wiley   +1 more source

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, Bruno V. Ribeiro, Janne Liebmann, Kai Rankenburg, Fred Jourdan, Ahmad Redaa, Jarred C. Lloyd, Thomas M. Belgrano, Carlos R. Corella Santa Cruz, Yujin Jegal, Julien Mercadier, Catherine Zimmermann, Jie Yu, Andreas Zametzer, Christopher L. Kirkland, Sarah E. Gilbert, Craig D. Storey, Luc S. Doucet, Isabelle Jones, Louisa Stokes, Thomas Zack, Delia Rösel, Denis Fougerouse, Jonas Kaempf, Priyanjan Datta, Hijas Hameed, Noreen J. Evans, Malcolm P. Roberts, Juraj Farkas, Stijn Glorie, Celia Mayers, R. Adam Frew, Sarah Al Odeh, Chloe E. Roche, Massimo Chiaradia, Alicia M. Cruz‐Uribe, Alan S. Collins, Andreas Karlsson, Anusha Shantha Kumara   +38 more
wiley   +1 more source

The Origins of Ploem's Filter Cube: A Pandora's Box

Journal of Microscopy, EarlyView.
Abstract Ploem's filter cube, central to modern epifluorescence microscopy, integrates three matched optical components: an excitation filter, an emission filter, and a dichroic mirror. Together, these elements enable the separation of excitation and emission light paths, producing high‐contrast fluorescence images.
Jack Gordon, Kaleah Balcomb, Vinod Maseedupally, Maitreyee Roy   +3 more
wiley   +1 more source

Satire and Silence Under Authoritarian Rule: Cotton and Pesticide Perceptions in Tajikistan

Journal of Agrarian Change, EarlyView.
ABSTRACT Over the past 70 years, agricultural chemicals have become a mainstay of cotton farming in Central Asia. This growing reliance on agrochemicals has not remained uncontested. This article analyses the politics of pesticides in Soviet and post‐Soviet Tajikistan by examining how, and to what extent, pesticides have featured in graphic satire, an ...
Irna Hofman, Flora Roberts
wiley   +1 more source

Synthesis and uranyl(VI) extraction performance of a calix[4]pyrrole–tetrahydroxamic acid receptor

Beilstein Journal of Organic Chemistry
The contamination of water by uranium poses a serious threat to ecosystems and human health, creating a need for efficient and selective remediation strategies.
Sara Karnib, Rana Baydoun, Wissam Zaidan, Nancy AlHaddad, Omar El Samad, Bilal Nsouli, Francine Cazier-Dennin, Pierre-Edouard Danjou   +7 more
doaj   +1 more source