Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Paul L. Wincott"'
Autor:
Jonathan R. Lloyd, David J. Vaughan, Paul L. Wincott, John M. Charnock, David A. Polya, Joyce M. McBeth, Kim M. Handley
Publikováno v:
Geochimica et Cosmochimica Acta. 102:124-142
Well-constrained laboratory incubations of a ferruginous marine hydrothermal sediment from Santorini, Greece, were used to elucidate the effect of microbially induced redox transformations on arsenic speciation and mobility. Despite naturally high ar
Autor:
P. M. Oliver, Th. Bertrams, Russell G. Egdell, G. Thornton, Paul L. Wincott, F.H. Jones, R.A. Dixon, T.M. Parker, A.W. Munz, T.W. Fishlock, Steve C. Parker
Publikováno v:
ResearcherID
The structure of the (110) surface of the tungsten bronze Na 2/3 WO 3 has been studied by scanning tunnelling microscopy. Two different types of image with threefold periodicity along the [110] direction are observed. The ×3 periodicity is shown to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd9c8e7a692f61614614975daf0c26af
https://ora.ox.ac.uk/objects/uuid:54d3c195-3af5-4fbc-92b6-9f9b5fd7accc
https://ora.ox.ac.uk/objects/uuid:54d3c195-3af5-4fbc-92b6-9f9b5fd7accc
Autor:
David J. Vaughan, Paul L. Wincott, John M. Charnock, Laura J C Butchins, Mark J. Jones, Joe S. Small, Richard A. D. Pattrick, Francis R. Livens
Publikováno v:
Applied Geochemistry. 26:1231-1238
Radium-226 is a naturally-occurring radioisotope with potentially significant radiological impact and whose environmental behaviour is of concern. The reactions of tracer (0.1–1 nM) dissolved Ra and its chemical analogue Ba with the surfaces of a r
Autor:
Miranda J. Keith-Roach, Christopher Boothman, Francis R. Livens, James P. Holt, R. Alvarez, Jonathan R. Lloyd, David J. Vaughan, Paul L. Wincott, Stephanie Handley-Sidhu
Publikováno v:
Geomicrobiology Journal. 28:457-470
The decomposition of depleted uranium (DU) alloy in the presence of microorganisms characteristic of clay-rich soils has been studied using microcosm experiments. To assess the possible roles of specific groups of soil microorganisms, enrichment cult
Publikováno v:
Geochimica et Cosmochimica Acta. 72:5616-5633
Arsenopyrite (FeAsS) and enargite (Cu3AsS4) fractured in a nitrogen atmosphere were characterised after acidic (pH 1.8), oxidative dissolution in both the presence and absence of the acidophilic microorganism Leptospirillum ferrooxidans. Dissolution
Autor:
Farhana Islam, C.M. Merrifield, Roy A. Wogelius, V. Thinnappan, David A. Polya, Paul L. Wincott
Publikováno v:
Applied Geochemistry. 23:3187-3204
Four different sets of experiments were completed in order to constrain vivianite [Fe3(PO4)2 · 8H2O] reactivity under conditions pertinent to As(V)-bearing groundwater systems. Firstly, titration experiments were undertaken in the pH range 4-9 to de
Autor:
David J. Vaughan, Paul L. Wincott, Emmanuelle S. Chardon, Nicholas D. Bryan, Dieter Schild, Francis R. Livens, Dirk Bosbach, Roy A. Wogelius, Ian C. Lyon, Christian M. Marquardt, J. Römer
Publikováno v:
Geochimica et Cosmochimica Acta. 72:288-297
Feldspar minerals are thermodynamically unstable in the near-surface environment and their surfaces are well known to react readily with aqueous solutions, leading to incongruent dissolution at low pH values, but congruent dissolution at neutral and
Publikováno v:
Geomicrobiology Journal. 24:199-204
Few studies have examined the molecular to micron-scale interactions between dissimilatory Fe(III)-reducing bacteria and poorly crystalline Fe(III) phases which are frequently the most bioavailable Fe(III) sources in the subsurface. Here we describe
Publikováno v:
Dental Materials. 23:665-673
Objectives To characterize the effect of two thione metal primers with phosphate groups on the surface morphology and composition of two noble prosthodontic alloys. Methods Cast specimens from Argen 81(Au–Pd) and Argipal (Hi–Pd) alloys which were
Publikováno v:
Surface Science Spectra. 13:109-116
Realgar (AsS) is an arsenic ore mineral formed in low temperature hydrothermal veins and hotsprings, and commonly associated with other arsenic minerals such as orpiment (As2S3). It is of significance environmentally in areas affected by acid mine dr