Results 81 to 90 of about 9,511 (218)

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  

Barite

, 2008
180x180 DPI Canon Powershot SD1000A large barite crystalCARES Summer Research ...
Corbitt, Nathan P.
core  

Modern approaches to barium ore benefication

Записки Горного института
Barite 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, Tatyana V. Grosheva, Aleksei V. Edelev, Vadim N. Gureev, Nikolai A. Mazov   +4 more
doaj  

Effects of Metal Ions on the Flotation of Fluorite and Barite: An Experimental and Mechanistic Investigation

Separations
Fluorite (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, Yuqiong Li, Yingchao Liu, Yuxin Guo, Caiyun Li, Wanglin Yang   +5 more
doaj   +1 more source

(Table EA2) Bulk sediment Ba and Ba barite concentrations in Costa Rica forearc samples

, 2012
(Table EA2) Bulk sediment Ba and Ba barite concentrations in Costa Rica forearc ...
Solomon, Evan A, Kastner, Miriam, Evan A Solomon (6983276), Miriam Kastner (6963548)   +3 more
core   +1 more source

MINERALOGICAL ANALYSIS OF BARITE AND SULFIDE BEARING BARITE MINERALIZATON IN THE TAURUS BELT, SOUTH TURKEY

, 2020
Barite and sulfide bearing barite mineralization are located at eleven different sites in a 100km long and 15km width zone of NW-SE trending between Antalya and Mersin regions of the Taurus Belt. Whereas some locations are rich only in barite, others are
CENGİZ, Oya
core  

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.
core   +1 more source

Mechanism and Performance of Bioenzyme-Enhanced DTPA Chelator in Removing Barite Plugging

Zuanjingye yu wanjingye
When 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, Hu WANG, Ni REN, Jie WANG, Jun CAI, Jihua CAI   +5 more
doaj   +1 more source

(Table T1) Concentrations of phosphorus components and barite of ODP Hole 199-1221C sediments

, 2005
(Table T1) Concentrations of phosphorus components and barite of ODP Hole 199-1221C ...
Faul, Kristina L, Kristina L Faul (6966203), Paytan, Adina, Adina Paytan (6966194)   +3 more
core   +1 more source

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, Pina Martínez, Carlos Manuel, Fernández Díaz, María Lourdes, Astilleros García-Monge, José Manuel, Putnis, Andrew   +4 more
core   +1 more source