Results 101 to 110 of about 17,122 (265)
Organización del conocimiento y arquitectura de la información: tendencias y tensiones
Revista Ibero-Americana de Ciência da Informação, 2011 Las nociones de “conocimiento” e “información” siguen siendo tan polisémicas y de naturaleza tan abierta, que cada vez que se refiere a ellas, debería hacerse explícita la significación particular que adquieren en un contexto determinado.
Mario Barité
doaj
Geologica Carpathica, 2016 Numerous small deposits and occurrences of Mn-Fe-fluorite-barite mineralization have developed at the contact of the Thuringian Basin, Thüringer Wald and Thüringer Schiefergebirge in central Germany.
Majzlan Juraj +4 more
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Modern approaches to barium ore benefication
Записки Горного институтаBarite is one of the critically important minerals in several industries, including the fuel and energy, nuclear, and medical sectors. For decades, its extraction did not require any complex techniques; however, with the depletion of rich barite-bearing ...
Nataliya V. Yurkevich +4 more
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Studies on the Beneficiation of Barite [PDF]
, 2004 Barite is extensively used as drilling mud in oil exploration operations. Beneficiation of barite by flotation was investigated using cationic and anionic collectors.
Bhaskar Raju, G +2 more
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Barite in northern Llano County
, 1941 This report gives the results of a study of barite deposits on the adjoining Freeman and Hillsmeier properties in northern Llano County, where a small tonnage of residual barite has been mined or "gophered" during recent years.
Zapp, Alfred D.
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SeparationsFluorite (CaF2) and barite (BaSO4) commonly occur together in the same deposits. Due to their similar surface chemical properties, their flotation separation is often challenging.
Ying Wei +5 more
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Radium and lead-210 in marine barite
, 1977 Measurements of 226Ra and 210Pb in barite samples separated from different depths of a piston core from the eastern equatorial Pacific are reported. 226Ra is enriched in the barite as would be expected from the chemistries of Ra and Ba; the 226Ra/Ba ...
Borole, D. V., Somayajulu, B. L. K.
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Mechanism and Performance of Bioenzyme-Enhanced DTPA Chelator in Removing Barite Plugging
Zuanjingye yu wanjingyeWhen drilling low-temperature geothermal wells into high-pressure formations, the barite (BaSO4) in weighted drilling fluids, under the action of differential pressure, invade formation fractures and form insoluble filter cakes to block flow channels ...
Wenshi WANG +5 more
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Epitaxial growth of celestite on barite (001) face at a molecular scale
, 2005 In situ AFM experiments have been conducted in order to obtain information about kinetics of celestite epitaxial growth on barite. Growth has been promoted by passing aqueous solutions supersaturated with respect to celestite over freshly cleaved barite (
Sánchez Pastor, Nuria +4 more
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Water Base Barite Filter Cake Removal Using Non-Corrosive Agents
, 2017 Barite is one of the most common weighting materials used in drilling fluid for deep oil and gas wells. Consequently, the main source of solids building the filter cake is the weighting material used in drilling fluids ‘Barite particles’.
A. A. Al-Majed +5 more
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