Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Daniel J. MacDonald"'
Autor:
George W. eLuther, Alyssa J Findlay, Daniel J. MacDonald, Shannon M. Owings, Thomas E Hanson, Roxanne A. Beinart, Peter R. Girguis
Publikováno v:
Frontiers in Microbiology, Vol 2 (2011)
The thermodynamics for the first electron transfer step for sulfide and oxygen indicates that the reaction is unfavorable as unstable superoxide and bisulfide radical ions would need to be produced. However, a two electron transfer is favorable as st
Externí odkaz:
https://doaj.org/article/aa76b66c37144bd4be09e174921d173e
Publikováno v:
Talanta. 199:415-424
A pump profiling system for real time sample collection has been constructed for a cost of$1000 (USD) and mated with a ship's rosette that has conductivity, temperature, depth (CTD) and other sensors. The system permits the collection of ~15 L of wat
Autor:
Sabah A. Ismail, Heider Al Humadi, Yawooz A. Kettanah, Alan S. Abdulrahman, Daniel J. MacDonald
Publikováno v:
Lithos. :106109
The studied Hemrin Basalt (HB) was previously mis-identified and called burnt hills. The HB is studied petrographically and geochemically as constraints for its provenance and geotectonics. The immobile trace element plot of Zr/TiO2–Nb/Y as well as
Autor:
George W. Luther, James W. Heiss, Clara S. Chan, Charles L. Dow, Holly A. Michael, Alyssa Findlay, Joshua M. Barnett, Sean M. McAllister, Daniel J. MacDonald
Publikováno v:
Limnology and Oceanography. 60:329-345
Intertidal aquifers host a reactive zone comprised of Fe mineral-coated sands where fresh and saline groundwaters mix. This zone may significantly influence the export of C, N, P, Fe, and other metals in submarine groundwater discharge (SGD). Toward
Autor:
George W. Luther, Daniel J. MacDonald, Thomas E. Hanson, Timothy J. Shaw, Alyssa Findlay, Amy Gartman
Publikováno v:
Geochimica et Cosmochimica Acta. 142:334-348
Elemental sulfur is an important intermediate of sulfide oxidation and may be produced via abiotic and biotic pathways. In this study the concentration and size fractionation of elemental sulfur were measured in two different sulfidic marine environm
Autor:
Michael R. Jennings, Chad S. Smithson, Alan J. Lough, Christian E. Carello, James F. Britten, Daniel J. MacDonald, T. Matt Letvenuk, Kathryn E. Preuss, Andreas Decken
Publikováno v:
Dalton transactions (Cambridge, England : 2003). 45(23)
Under aprotic conditions, the reaction of 4-amino-1,2-naphthoquinone with excess S2Cl2 generates 4,5-dioxo-naphtho[1,2-d][1,2,3]dithiazol-2-ium chloride in a typical Herz condensation. By contrast, prior literature reports an imine (NH) product, 4,5-
Autor:
Alyssa Findlay, Daniel J. MacDonald, Beverly K. Chiu, Clara S. Chan, George W. Luther, Shingo Kato, Erin K. Field
Publikováno v:
Geobiology. 14(5)
Observations of modern microbes have led to several hypotheses on how microbes precipitated the extensive iron formations in the geologic record, but we have yet to resolve the exact microbial contributions. An initial hypothesis was that cyanobacter
Autor:
Alan J. Lough, Paul A. Dube, James F. Britten, Jian Wu, Rodolphe Clérac, Kathryn E. Preuss, Michael C. Jennings, Daniel J. MacDonald, Craig M. Robertson, Ie-Rang Jeon
Publikováno v:
Inorganic Chemistry
Inorganic Chemistry, American Chemical Society, 2012, 51, pp. 3827-3839. ⟨10.1021/ic3000284⟩
Inorganic Chemistry, American Chemical Society, 2012, 51, pp. 3827-3839. ⟨10.1021/ic3000284⟩
13 pages; International audience; Metal complexes of the 4-(2′-pyrimidyl)-1,2,3,5-dithiadiazolyl (pymDTDA) neutral radical ligand and its selenium analogue (pymDSDA) are presented. The following series of metal ions has been studied using M(hfac)2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0b19d99433a2056fa8b9686a6f17c4e
https://hal.archives-ouvertes.fr/hal-00681401
https://hal.archives-ouvertes.fr/hal-00681401
Autor:
Alyssa Findlay, Shannon M. Owings, Thomas E. Hanson, Roxanne A. Beinart, Daniel J. MacDonald, George W. Luther, Peter R. Girguis
Publikováno v:
Frontiers in Microbiology, Vol 2 (2011)
Frontiers in Microbiology
Frontiers in Microbiology
The thermodynamics for the first electron transfer step for sulfide and oxygen indicates that the reaction is unfavorable as unstable superoxide and bisulfide radical ions would need to be produced. However, a two-electron transfer is favorable as st
Publikováno v:
Acta crystallographica. Section C, Crystal structure communications. 66(Pt 5)
In a new polymorphic form of dichloridotriphenylantimony, [Sb(C(6)H(5))(3)Cl(2)], there are two crystallographically unique molecules in the asymmetric unit and it has been determined that this polymorph is one of two kinetically favoured phases of p