Results 21 to 30 of about 44,550 (298)

Characteristics of bitumen in sandstone-type copper-rhenium deposits in the Mishi Basin, Xichang, Sichuan Province, and its relationship with copper and rhenium enrichment mineralization

open access: yes地质科技通报, 2023
The Mesozoic Mishi continental basin in the Xichang District, Sichuan Province, is located on the western margin of the Yangtze Craton. Rhenium associated with sandstone-type copper ore has recently been discovered in the Lower Cretaceous Feitianshan ...
Bangqiao Chen   +5 more
doaj   +1 more source

The MRO-accompanied modes of Re-implantation into SiO2-host matrix: XPS and DFT based scenarios [PDF]

open access: yes, 2017
The following scenarios of Re-embedding into SiO2-host by pulsed Re-implantation were derived and discussed after XPS-and-DFT electronic structure qualification: (i) low Re-impurity concentration mode -> the formation of combined substitutional and ...
Boukhvalov, D. W.   +6 more
core   +1 more source

Concentration of rhenium from dilute sodium chloride solutions [PDF]

open access: yesJournal of the Serbian Chemical Society, 2008
The conditions for the desorption of rhenium from the anion exchange resin Dowex 1-x8 by HNO3, HCl, H2SO4 and NaOH were determined. The solution (5.0´10-3 mol dm-3 Re in 0.15 mol dm-3 NaCl) was passed through a column containing 0.10 g of the resin.
DRAGOLJUB M. LUKIC   +2 more
doaj   +3 more sources

Discovery of Tantalum, Rhenium, Osmium, and Iridium Isotopes [PDF]

open access: yes, 2011
Currently, thirty-eight tantalum, thirty-eight rhenium, thirty-nine osmium, and thirty-eight iridium, isotopes have been observed and the discovery of these isotopes is discussed here.
Abou-Leila   +131 more
core   +1 more source

First examples of neutral rhenium(V) complexes with a novel semi-rigid ligand containing a P,N,N,S donor atom set: Synthesis, characterisation and crystal structure [PDF]

open access: yes, 2007
A new PN2S ligand, N-[2-(diphenylphosphino)phenyl]-2-[(S-trityl)acetylamino]ethanamide [Ph-P(Ph2)N2S(Trt)], was synthesised and reacted with ReV precursors.
Benoist, Eric   +5 more
core   +4 more sources

Carbon−Phosphorus Bond Activation of Tri(2-thienyl)phosphine at Dirhenium and Dimanganese Centers [PDF]

open access: yes, 2009
Reaction of [Re2(CO)9(NCMe)] with tri(2-thienyl)phosphine (PTh3) in refluxing cyclohexane affords three substituted dirhenium complexes: [Re2(CO)9(PTh3)] (1), [Re2(CO)8(NCMe)(PTh3)] (2), and [Re2(CO)8(PTh3)2] (3).
Begum, Noorjahan   +12 more
core   +2 more sources

Reaction Mechanism and Process Control of Hydrogen Reduction of Ammonium Perrhenate

open access: yesMetals, 2020
The preparation of rhenium powder by a hydrogen reduction of ammonium perrhenate is the only industrial production method. However, due to the uneven particle size distribution and large particle size of rhenium powder, it is difficult to prepare high ...
Junjie Tang   +6 more
doaj   +1 more source

The denitridation of nitrides of iron, cobalt and rhenium under hydrogen [PDF]

open access: yes, 2013
The denitridation behaviour of binary iron, cobalt and rehnium nitrides under H2 /Ar has been investigated. The iron nitride was found to lose over 70 % of its as prepared nitrogen content at 400 °C. The cobalt nitride was completely denitrided at 250 °C.
Alexander, A.-M.   +2 more
core   +3 more sources

Shock response of single crystal rhenium: Effect of crystallographic orientation

open access: yesJournal of Materials Research and Technology, 2023
Rhenium, a unique engineering material with the second highest melting point of all metals, has significant application potential in harsh service environments, and thus evaluating its mechanical responses under shock loadings is of great importance ...
Mingdong Hu   +6 more
doaj   +1 more source

Dynamic Processes of Rhenium Polyhydride Complexes

open access: yesMolecules, 2022
Studies have demonstrated that high-coordination-number rhenium polyhydride complexes are precursors to catalysts that transform a variety of organic molecules. While rhenium polyhydride complexes lead to active catalysts, little has been reported on the
Datta V. Naik, Gregory A. Moehring
doaj   +1 more source

Home - About - Disclaimer - Privacy