Results 301 to 310 of about 163,121 (346)
Some of the next articles are maybe not open access.
Quantitative bioimaging of platinum group elements in tumor spheroids
Analytica Chimica Acta, 2016Limited drug penetration into tumor tissue is a significant factor to the effectiveness of cancer therapy. Tumor spheroids, a 3D cell culture model system, can be used to study drug penetration for pharmaceutical development. In this study, a method for quantitative bioimaging of platinum group elements by laser ablation (LA) coupled to inductively ...
Ann-Christin, Niehoff +13 more
openaire +2 more sources
Platinum-Group Element (PGE) Deposits
2000The platinum-group elements (PGE) comprise a geochemically coherent group of siderophile to chalcophile metals that includes osmium (Os), iridium (Ir), ruthenium (Ru), rhodium (Rh), platinum (Pt), and palladium (Pd). Based on association, the PGE may be divided into two subgroups: the Ir-subgroup (IPGE) consisting of Os, Ir, and Ru and the Pd-subgroup (
openaire +1 more source
The plant availability of auto-cast platinum group elements
Environmental Geochemistry and Health, 2008The introduction of automobile catalysts has raised environmental concern, as this pollution control technology is also an emission source for platinum group elements (PGE). The main aim of this study was to assess soil and grass PGE concentrations in soils adjacent to five road networks. The soil and grass samples were collected from four distances at
P S, Hooda, A, Miller, A C, Edwards
openaire +2 more sources
Anthropospheric Losses of Platinum Group Elements
2013The platinum group elements are among the rarest elements in the Earth’s crust yet each plays an important role in modern society. Despite their technological importance, little has been published on how much is lost during their extraction, processing, use and recycling. This chapter provides estimates of global losses of Pt, Pd, Rh, Ru and Ir at each
openaire +1 more source
Adsorption Kinetics of Platinum Group Elements in River Water
Environmental Science & Technology, 2006The uptake of platinum group elements (PGE) by different preparations of estuarine sediment suspended in filtered river water has been examined. For a given PGE, adsorption time courses to untreated sediment and to sediment whose hydrous metal oxides or organic matter had been removed by appropriate chemical treatments were similar.
Andrew, Turner +4 more
openaire +2 more sources
Platinum group element (PGE) deposits
2004PGE accessible to mankind are derived from the earth’s mantle, with possibly a component coming from the core. This chapter is concerned with (a) the distribution and behavior of PGE in the mantle and in magmas derived from the mantle, (b) the characteristics of deposits derived directly or indirectly from these magmas, and (c) the methods by which ...
openaire +1 more source
Fractionation of the Platinum-Group Elements During Mantle Melting
Science, 2004Experiments in sulfide-silicate systems demonstrate that two sulfide phases are stable in the asthenospheric upper mantle: a crystalline osmium-iridiumruthenium–enriched monosulfide and a rhodium-platinum-palladium–enriched sulfide melt. During silicate melt segregation, monosulfide stays in the solid residue, dominating the noble metal spectrum of ...
Conny, Bockrath +2 more
openaire +2 more sources
Platinum-Group Element Abundance Patterns in Different Mantle Environments
Science, 1997Mantle-derived xenoliths from the Cameroon Line and northern Tanzania display differences in their platinum-group element (PGE) abundance patterns. The Cameroon Line lherzolites have uniform PGE patterns indicating a homogeneous upper mantle over several hundreds of kilometers, with approximately chondritic PGE ratios. The PGE patterns of the Tanzanian
, Rehkamper +4 more
openaire +2 more sources
Some facts on the platinum-group elements
International Review of Financial Analysis, 2017The platinum-group elements (PGE) include platinum, palladium, rhodium, ruthenium, iridium, and osmium. In this article, we concentrate on the dependency structure and economic determinants of PGE, silver, and gold prices. We find that the strongest relationship is between silver and gold returns at a weekly frequency (July 1992–July 2016), which ...
openaire +1 more source
Platinum Group Element Emissions from Automobile Catalysts
2012In the last 19 years the use of automotive catalytic converters in the European union has been mandatory in order to control exhaust gas emissions. A new sampling system was developed in order to be applied directly at the exhaust pipe of vehicles combined with an exhaust gas analyzer in order to achieve total sampling of Pt, Pd, Rh (Platinum Group ...
M. Paraskevas +1 more
openaire +1 more source