Gold is generally associated with arsenopyrite and low base metal content, but also occurs as native metal
Summary: TEHRAN (FNA)- Researchers describe the first observation of a native ferroelectric metal: a native metal
with bistable and electrically switchable spontaneous polarization states -- the hallmark of ferroelectricity.
Adhesive interactions of polyurethane monomers with native metal
Cobalt(II), being a d7 ion used as a probe, can substitute the native metal
into both structural and catalytic metal-binding sites of the examined proteins.
He concluded that the coating of silver oxide on the surface of the metal was giving off ions--[Ag.sup.1+] +, [Ag.sup.2+] and [Ag.sup.3+]--and that it was these ions, not the native metal
, that were responsible for the antibacterial effect.
The presence of native metal
melt inclusions does not suggest that all Ag and Bi were deposited from metal-rich melts; however, mobilization of native metals
may be responsible for some of the observed textures in the veins and for some remobilization and concentration of Ag and Bi within the five-element (Ni-Co-As-Ag-Bi) veins at Cobalt and similar occurrences worldwide.
The surface area of mill scale coating or of rust is greater than that of the underlying native metal
(steel) and the thicker the mill scale coating the more adsorption is expected to occur.
The gold is present as micronsize grains of native metal
associated with iron-oxides, quartz, and pyrite.
All three were known in antiquity, but copper alone had many names descriptive of the native metal
, various ores, brass (orichalcum or aurichalcum), and bronze.
Here, microorganisms change me into methylated organic forms that, unlike my native metal
, are easy for organisms to absorb.
Because the span of this shiny native metal
mass was so impressive it was called "The Silver Sidewalk." The Natural History Museum of Los Angeles displayed a rich chunk from this odd occurrence.
Hubert especially liked native metals
; his collection contains two platinum nuggets from Russia, as well as 70 native gold specimens, including an amazing ribbon gold from Garden Valley, California; a large leaf gold from Jamestown, Tuolumne County, California; several fine Eagle's Nest mine golds; and two large and spectacular, somewhat waterworn gold crystals from Icabaru, Bolivar, Venezuela.