Results 1 to 10 of about 1,113,246 (176)

Anomaly and geochemistry of rare earth elements and yttrium in the late Permian coal from the Moxinpo mine, Chongqing, southwestern China [PDF]

open access: yesInternational Journal of Coal Science & Technology, 2014
The rare earth elements and yttrium (REY) of the K2 coal from the Moxinpo mine, Chongqing, were determined using inductively coupled plasma mass spectrometry (ICP-MS).
Jianhua Zou   +5 more
doaj   +2 more sources

Rey propietario o rey soberano

open access: yesHistoria Mexicana El Colegio de México, 1994
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Mariano Peset   +1 more
doaj   +2 more sources

A review on mineralogical speciation, global occurrence and distribution of rare earths and Yttrium (REY) in coal ash

open access: yesProceedings of the Indian Academy of Sciences, Earth and Planetary Sciences, 2022
Rare earths and Yttrium (REY) are a group of critical metals essential for this electronic and digital era. China is the leading producer of REY with more than 90% of global export.
A. Choudhary, Santosh Kumar, S. Maity
semanticscholar   +1 more source

A última Jedi

open access: yesViso, 2021
Este artigo visa comentar as hipóteses formuladas por Vladimir Vieira em O despertar do mito, concernentes à recepção das três trilogias de Star Wars e à relação de cada uma delas com o caráter mítico alcançado pela saga. Além disso, procura-se avaliar a
Cíntia Vieira da Silva
doaj   +1 more source

Geochemistry of REY-Enriched Phosphorites in Zhijin Region, Guizhou Province, SW China: Insight into the Origin of REY

open access: yesMinerals, 2022
The rare earth elements and yttrium (REY)-enriched phosphorites in the Zhijin region, southwest China, have attracted much attention, yet its origin has not been sufficiently addressed.
Shan He   +9 more
semanticscholar   +1 more source

Mechanism and Influencing Factors of REY Enrichment in Deep-Sea Sediments

open access: yesMinerals, 2021
Deep-sea sediments with high contents of rare-earth elements and yttrium (REY) are expected to serve as a potential resource for REY, which have recently been proved to be mainly contributed by phosphate component. Studies have shown that the carriers of
Jiangbo Ren   +6 more
semanticscholar   +1 more source

Reflexiones sobre la inviolabilidad de la Corona en el Estado Democrático de Derecho

open access: yesTeoría & Derecho, 2021
La Monarquía parlamentaria y la posición constitucional del monarca son elementos del pacto constitucional de 1978. La inviolabilidad ha integrado históricamente el estatus jurídico del rey y se ha conservado en el modelo de monarquía parlamentaria ...
Asunción de la Iglesia Chamarro
doaj   +1 more source

Ciudadanía antigua y moderna: Tito Livio y Maquiavelo

open access: yesRevista Mexicana de Ciencias Políticas y Sociales, 2023
El objetivo del presente trabajo es analizar el concepto de ciudadanía en Nicolás Maquiavelo, particularmente la influencia de las instituciones y prácticas de la antigua Roma en su conceptualización, fundamentalmente las que se perciben en el recuento ...
Roberto Garcia Jurado
doaj   +1 more source

Environmental Restoration of Archeological Landscape in Tappeh Mil of Varamin [PDF]

open access: yesمدیریت بیابان, 2014
The ancient area of Rey on the central plateau of Iran is a valuable site for archeological sequences in a natural plain. It has valuable natural resources, and history and archeology specialists along with the native and non-native tourists, has given ...
Behrang Bahrami   +4 more
doaj   +1 more source

Development of Understanding of the Primary Nature of the Ancient ‘Tepe Mil’, a Comparison between ‘Presented Space’ and ‘Represented Space’ [PDF]

open access: yesهنر و تمدن شرق, 2023
Tappeh Mill is one of the most enigmatic historical structures in Iran, situated within the ancient boundaries of Rey. Despite various efforts to enhance awareness about it, the results have been less fruitful for various reasons.
Arash Taqipour Akhtari
doaj   +1 more source

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