Results 21 to 30 of about 254 (118)
International Journal of Economic and Environment Geology, 2020 This study presents geochemical characterization, as well as, quantification of rare earth elements in the recent beach deposition at the two major islands of the eastern Bay of Bengal-Kutubdia and Moheshkhali.
Farah Deeba, Syed Hafizur Rahman, Mohammad Zafrul Kabir, Mohammad Rajib
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Archives of Foundry Engineering, 2015 The paper presents the results of basic research on the influence of the properties of sand grains on electrical properties of water glass moulding sands.
Opyd B., Granat K.
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Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.Abstract Magnesite (MgCO3) is a magnesium (Mg) carbonate mineral that records the aqueous environmental conditions of its formation. On Earth, magnesite forms in metamorphic, diagenetic or pedogenic environments, and distinguishing between these environments is critical for understanding the fluid chemistry during magnesite precipitation. Mg carbonates
E. L. Cardarelli +6 more
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Potassium isotopic compositions and exposure ages of evolved and silica‐rich achondrites
Meteoritics &Planetary Science, Volume 61, Issue 8, Page 2140-2162, August 2026.Abstract Some of the oldest igneous rocks in the Solar System include evolved and silica‐rich achondrites that originate from parent bodies less than 1000 km in diameter, referred to as planetesimals. While Earth was initially in a molten state and required continental crust formation and plate tectonics to generate andesite bulk compositions, evolved ...
Z. Vaci +9 more
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Effects of different casting mould cooling rates on microstructure and properties of sand-cast Al-7.5Si-4Cu alloy [PDF]
China Foundry, 2013 In this work, Al-7.5Si-4Cu alloy melt modified by Al-10Sr, RE and Al-5Ti-B master alloys was poured into multi-step moulds made from three moulding sands, including quartz, alumina and chromite, to investigate comparatively the effects of different ...
Liu Guanglei, Si Naichao, Sun Shaochun
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Agglomeration Phenomena During Fluidized Bed Combustion/gasification of Biomass Fuels
Chemical Engineering Transactions, 2019 The objective of this research is to investigate the occurrence of agglomeration phenomena during fluidized bed processing of biomass fuels. These are to be ascribed to the alkali content in biomass materials that gives rise to low melting compounds in ...
Francesco Miccio +3 more
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Natural Resources and Political Patronage in Africa: An Ethnicity Level Analysis
Review of Development Economics, Volume 30, Issue 3, Page 1957-1972, August 2026.ABSTRACT We investigate the effect of resource discoveries on ethnicity‐level political patronage in Africa using a large geospatial dataset of 254 ethnic groups in 15 countries over the period 1960–2004. We find that the first (or single first) resource discovery in a virgin ethnic homeland increases the share of cabinet posts of that ethnicity.
Sambit Bhattacharyya, Nemera Mamo
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Effect of cooling rate on solidification structure and linear contraction of a duplex stainless steel [PDF]
China Foundry, 2012 Cooling rate is a key factor that can drastically affect the phase transformation and thermal stress of duplex stainless steels. Therefore, in this research, different sand moulds were used to explore the influence of cooling rate on the solidification ...
Zhong Honggang, Chen Xiangru, Ao Lu
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New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.Detrital platinum group minerals (PGM) are rare and distinctive in Pleistocene–Holocene sedimentary systems of the southern South Island, thereby enabling tracking of their long‐distance transport for ∼200 km. The first ∼100 km of transport involved Pleistocene glaciofluvial processes southwards down the Waiau River, where PGM (principally Pt–Fe and Ru–
Dave Craw, Marshall Palmer
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Biofuels, Bioproducts and Biorefining, Volume 20, Issue 3, Page 1235-1243, May/June 2026.Abstract The long‐term viability of Jatropha curcas as a biodiesel feedstock has been widely debated. Many early initiatives failed to deliver consistent economic returns despite promising environmental attributes. This study re‐evaluated J. curcas‐based systems within an integrated environmental–economic framework, focusing on their potential role in ...
Eduardo Sansão Sozinho Maurício +3 more
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