Results 31 to 40 of about 489,598 (158)

Fine and super‐fine gold in mine waste from a coastal placer in southern New Zealand

New Zealand Journal of Geology and Geophysics, Volume 68, Issue 2, Page 327-341, June 2025.
ABSTRACT Reprocessing of mine wastes is a growing procedure around the world, in order to extract more resources from already‐mined rocks. Mineralogical and geometallurgical investigations are useful for planned reprocessing, and in this study at Round Hill placer gold mine we characterise fine (<100 µm) and super‐fine (micron‐scale) particulate gold ...
Marshall Palmer, Dave Craw
wiley   +1 more source

Redistribution of fine gold from hydrothermal sources to sedimentary sinks, Rakaia River, Canterbury, New Zealand

New Zealand Journal of Geology and Geophysics, Volume 68, Issue 2, Page 282-303, June 2025.
ABSTRACT The Rakaia River in the South Island of New Zealand is a unique catchment in which to trace active detrital gold transport, deformation and concentration from near‐coeval orogenic sources. The catchment hosts widespread small late Cenozoic hydrothermal alteration zones, some of which are gold‐bearing, in actively rising and eroding mountain ...
Marshall Palmer, Dave Craw
wiley   +1 more source

Synergistic Metal‐Support Interactions in Au/GaN Catalysts for Photoelectrochemical Nitrate Reduction to Ammonia

Small, Volume 21, Issue 11, March 19, 2025.
A solar‐driven photoelectrochemical system is presented for sustainable NH3 production via NO3− reduction, addressing the energy demands of conventional processes. In this system, Au nanoclusters on GaN nanowires enable a tandem catalysis mechanism: NO₃⁻ reduces to NO2− on GaN, followed by NH3 synthesis on Au.
Wan Jae Dong, Jan Paul Menzel, Zhengwei Ye, Zhuoran Long, Ishtiaque Ahmed Navid, Victor S. Batista, Zetian Mi   +6 more
wiley   +1 more source

Menstrual experience of adolescents in the USA: protocol for a scoping review

BMJ Open, 2021
Introduction In recent years, there has been a growing desire to address issues related to menstruation, particularly for adolescent girls. In low-income and middle-income countries, prior literature review of the adolescent menstrual experience suggests
Deborah J Shim, Ronke Olowojesiku, Bryanna Moppins, Daye Park, Jasmine O Patterson, Samantha A Schoenl, Julie K Gaines, Edwin V Sperr, Amy Baldwin   +8 more
doaj   +1 more source

Rapidity equilibration in d + Au and Au + Au systems [PDF]

The European Physical Journal A, 2006
In a Relativistic Diffusion Model (RDM), the evolution of net-proton rapidity spectra with sqrt(s_NN) in heavy systems is proposed as an indicator for local equilibration and longitudinal expansion. The broad midrapidity valley recently discovered at RHIC in central Au + Au collisions at sqrt(s_NN)= 200 GeV suggests rapid local equilibration which is ...
openaire   +2 more sources

Formation of Cu, Ag and Au nanofiims under the influence of hydrogen atoms

Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2015
Due to their electrical properties, thin metallic films are widely used in modern micro- and nanoelectronics. These properties allow solving fundamental problems of surface and solid state physics.
E. L. Zhavzharov, V. M. Matyushin
doaj   +1 more source

Porous Iron Oxide Core–Gold Satellite Nanocomposite: A Cost‐Effective and Recyclable Solution for Photocatalytic Wastewater Treatment

Small Science, Volume 4, Issue 2, February 2024.
This article reports a porous Fe3O4 core–Au satellite nanocomposite prepared using a selective etching strategy for realizing advanced oxidation processes under visible light. The porous structure of the synthesized nanomaterial considerably enhances its photocatalytic activity, surface area, and light absorption.
Thomas Myeongseok Koo, Hong En Fu, Jun Hwan Moon, Eunsoo Oh, Yeonbeom Kim, Min Jun Ko, Young Keun Kim   +6 more
wiley   +1 more source

La facilitation territoriale, un métier à développer et à défendre : une expérience tunisienne [PDF]

Sciences, Eaux & Territoires, 2021
Les facilitateurs territoriaux ont généralement pour mission de faciliter le dialogue entre différents types d’acteurs (agriculteurs, élus, administration…) en vue du développement d’un territoire.
BRAIKI, Housem, LESTRELIN, Guillaume, MORARDET, Sylvie, YOUNSI, Somaya, HASSENFORDER, Emeline, IMACHE, Amar, BARBE, Audrey, BEN HASSINE, Anissa, HADAJI, Fethi, HADAJI, Fethi   +9 more
doaj  

Study of the visible light activity of Pt and Au-TiO2 photocatalysts in organic pollutants degradation

Revista Facultad de Ingeniería Universidad de Antioquia, 2017
Los fotocatalizadores Pt-TiO2 y Au-TiO2 se prepararon por fotodeposición del metal noble sobre el TiO2 sulfatado. Se encontró que las propiedades ópticas, el estado de oxidación y el tamaño de partícula de las especies metálicas (Pt o Au) juegan un papel
Jairo Antonio Cubillos-Lobo, Julie Joseane Murcia-Mesa, Jhonatan Ricardo Guarín-Romero, Hugo Alfonso Rojas-Sarmiento, María del Carmen Hidalgo-López, José Antonio Navío-Santos   +5 more
doaj  

Colloque « Au théâtre, au cinéma : au féminin » [PDF]

Labyrinthe, 2000
Le Centre d’etudes feminines de l’Universite de Paris-VIII est le seul lieu institutionnel dote d’une equipe doctorale qui propose de reflechir aux problematiques de la difference sexuelle, et des differences en general. Les etudes feminines ont recemment organise, sous la direction de Mireille Calle-Gruber, un colloque sur les rapports du theâtre et ...
openaire   +1 more source