Results 81 to 90 of about 31,485 (279)

Quantifying user variability in the traditional X‐ray ice‐rafted‐debris counting technique

Journal of Quaternary Science, EarlyView.
ABSTRACT The flux of icebergs is most commonly constrained in the palaeo‐record by manually counting gravel clasts in sediment core X‐ray images—a trusted method in Quaternary science and palaeoceanography for nearly 40 years. In this study, we explore the reproducibility (user consistency and between‐user variability) of the traditional clast‐counting
Neil McDonald, Tom Bradwell, S. Louise Callard, Jaime L. Toney   +3 more
wiley   +1 more source

Petrography of pyrite crystals. [PDF]

, 2014
(A) SEM-BSE image of an euhedral crystal after severe HNO3 etching. Note the spongy texture in the centre and the growth bands in the outer part. (B) SEM-BSE image of floriform pyrite after severe HNO3 etching.
Marco Vecoli (588717), Sylvain Bernard (588705), Lauriss Ngombi Pemba (588701), Juan Manuel Garcia Ruiz (588711), Anne Catherine Pierson-Wickmann (588714), Gerard J. M. Versteegh (588718), Roberto Macchiarelli (141904), Christian Cesari (588708), Claude Fontaine (588709), Ernest Chi-Fru (588710), Abderrazak El Albani (588696), Alain Meunier (588703), Andrey Bekker (588721), Philippe Boulvais (588706), Idalina Moubiya Mouele (588704), Arnaud Mazurier (588713), Armelle Riboulleau (588699), Lee White (588719), Alain Trentesaux (588716), Donald E. Canfield (588698), Marc Chaussidon (588707), Stefan Bengtson (588697), Claire Rollion Bard (588700), Emma Hammarlund (588702), Olivier Rouxel (588715), François Gauthier-Lafaye (588712), Karim Benzerara (192895), Martin Whitehouse (588720)   +27 more
core   +1 more source

Anaerobic Corrosion Phenomena of Cast Iron and Copper in Artificial Groundwater at Elevated Temperature

Materials and Corrosion, EarlyView.
This study examines corrosion of copper and cast iron as candidate canister materials for high‐level radioactive waste disposal in contact with bentonite suspension. The influence of three electrolyte compositions on corrosion behavior under repository‐relevant conditions is assessed.
Louisa Panjiyar, Martin Ende, Christiane Stephan‐Scherb   +2 more
wiley   +1 more source

Outer‐Sphere Tuning of Synthetic Iron–Sulfur Clusters Within Nanoscale Cage Frameworks

Small, EarlyView.
Noncovalent encapsulation of a synthetic iron–sulfur cluster within hydrophobic, naphthalenediimide (NDI)‐paneled cages is shown to lead to dramatic changes in the electronic structure and covalency of the Fe─S core. ABSTRACT As atomic‐scale archetypes for multi‐electron transfer, iron–sulfur clusters are compelling candidates for the design of redox ...
Rupal Baliyan, Shelby T. Davis, Jan‐Niklas Boyn, Gwendolyn A. Bailey   +3 more
wiley   +1 more source

Influence of Ca2+ and Mg2+ on Pyrite Flotation at Different Slurry Temperatures

Kuangchan zonghe liyong
This is an article in the field of mineral processing engineering. Through single mineral flotation test, solution chemistry calculation, Zeta potential detection, XPS detection, the influence and regulation mechanism of Ca2+ and Mg2+ on the flotation of
Xin WANG, Tingshu HE, Bo YU, Hanbing HE, Yubin WANG   +4 more
doaj   +1 more source

Controlled growth of uniform nanoflakes-built pyrite FeS2 microspheres and their electrochemical properties [PDF]

, 2011
Nanoflakes-built pyrite FeS2 microspheres were synthesized through a simple solvothermal process in mixed solvents of N, N-dimethytformamide and ethylene glycol without using any surfactant.
Wu, Minghao, Wang, Qihua, Wang, Dewei, Wang, Tingmei, Chen, Jian, QihuaWang   +5 more
core   +1 more source

Sodium‐Based Battery Component Design: Imitating Lithium or Forging New Paths?

Small, EarlyView.
This Perspective elucidates the decisive yet underexplored impact of cation chemistry, Na+ vs. Li+ charge carriers, on the design, selection, and formulation of their corresponding battery systems, addressing common misconceptions and the pitfalls of overreliance on Li+ design principles. Leveraging the unique characteristics of Na+, it comprehensively
Xingxing Wang, Ziyu Song, Wenfang Feng, Moritz Schütte, Sascha Berg, Feng Cai, Viviane Maccio‐Figgemeier, Dirk Uwe Sauer, Stefano Passerini, Michel Armand, Zhibin Zhou, Egbert Figgemeier, Heng Zhang, Gebrekidan Gebresilassie Eshetu   +13 more
wiley   +1 more source

SQUID-SIMS is a useful approach to uncover primary signals in the Archean sulfur cycle [PDF]

, 2014
The Agouron Institute and National Aeronautic and Space Administration Exobiology Award NNX09AM91G supported this work.Many aspects of Earth's early sulfur cycle, from the origin of mass-anomalous fractionations to the degree of biological participation,
Guan, Yunbin, Woodward W. Fischer, Fike, David A., Fike, David A, Jena E. Johnson, Raub, Timothy D, David A. Fike, Fischer, Woodward W., Johnson, Jena E, Eiler, John M, Timothy D. Raub, Raub, Timothy D., Yunbin Guan, Kirschvink, Joseph L., Johnson, Jane E., Joseph L. Kirschvink, John M. Eiler, Fischer, Woodward W, Kirschvink, Joseph L, Eiler, John M.   +19 more
core   +1 more source

Coupled intra‐ and inter‐tunnel short‐range order in hollandites: a case study of mannardite Ba[(Ti4+)6(V3+)2]O16

Acta Crystallographica Section B, EarlyView.
Single‐crystal X‐ray diffuse scattering combined with Monte Carlo simulations and 3D‐ΔPDF analysis reveals complex short‐range order in mannardite, involving coupled Ba–Ba interactions within and between tunnels and framework relaxation.Mannardite, Ba[(Ti4+)6(V3+)2]O16, a mineral of the hollandite supergroup, is characterized by a tunnel structure ...
Ella Mara Schmidt, Marta Morana, Cristian Biagioni, Arianna Minelli, Alexei Bosak, Giovanni Orazio Lepore   +5 more
wiley   +1 more source

Regulation mechanism and kinetic characteristics of pyrite oxidation mediated by aluminum-bearing minerals

Chemical Engineering Journal Advances
As the most prevalent metal sulfide mineral in mining environments, pyrite readily undergoes oxidation under surface conditions to generate acid mine drainage, resulting in a series of environmental pollution issues.
Junwei Zhang, Tao Lin, Xuke Dai, Tianqi Liu, Wenqian Zhang, Dayuan Jiang, Lei Kou   +6 more
doaj   +1 more source