Now showing items 61-70 of 7095
Argentinean copper concentrates: structural aspects and thermal behaviour
(Scientific Research Publishing, 2013-10)
In Argentina, there are many sources of copper concentrates. Some of them are currently in operation, while others are in the exploration stage. All copper concentrates produced are exported to other countries for copper ...
Infrared and theoretical interpretation of the structure of naphthalocyanine and its copper(II) complex deposited onto a smooth copper surface
The infrared spectra of naphthalocyanine (H2Nc) and its copper(II) complex (CuNc) were registered in the region 4000-450 cm-1. These compounds were deposited onto a smooth copper surface and their specular infrared spectra ...
Cross-Dehydrogenative Coupling of Tertiary Amines and Terminal Alkynes Catalyzed by Copper Nanoparticles on Zeolite
A wide range of catalysts based on supported copper nanoparticles have been prepared and tested in the cross-dehydrogenative coupling of tertiary amines and terminal alkynes. Copper nanoparticles on zeolite Y were found ...
Study of the influence of the rare earth elements (Ce3+ and Ce4+) concentration on the siloxanes coating applied on the copper surface
This work studied the influence of the rare earth (Ce3+ and Ce4+) elements concentration in polysiloxane flints deposited on copper by dip-coating process, and evaluated their resistance in a 3.5 wt.% NaCl medium. Classical ...
MAGNETO-STRUCTURAL STUDIES OF A COPPER (II)-ALKYLPYRAZOLONE ENAMINE COMPLEX
(Sociedad Chilena de Química, 2006)
THE INTERACTION OF ATOMIC OXYGEN WITH SMALL COPPER CLUSTERS: A THEORETICAL APPROACH
(Sociedad Chilena de Química, 2005)
Co-simulating Total and Soluble Copper Grades in an Oxide Ore Deposit
In oxide copper deposits, the acid soluble copper represents the fraction of total copper recoverable by heap leaching. Two difficulties often complicate the joint modeling and simulation of total and soluble copper ...
REDUCTION OF CHILEAN COPPER SLAGS: A CASE OF WASTE MANAGEMENT PROJECT
The Chilean copper smelters are producing large amount of copper slags. These copper slags are deposited at landfills. In the present time, a huge amount of copper slags are accumulated in Chile. The main problem with ...
Copper accumulation in Xanthomonas campestris pv. vesicatoria
(Sociedade Brasileira de Genética, 1996)
Estudio de los procesos de corrosion de una aleacion metalica de cobre usada en odontologia
Corrosion phenomena in a dental copper-based alloy are experimentally studied using electrochemical techniques. Two heating sources, torch and induction, were used in the casting experiments. In the corrosion essays, the ...