Results 31 to 40 of about 32,026 (209)

PINTURAS RUPESTRES DO SÍTIO ARQUEOLÓGICO LETREIRO DA PEDRA RISCADA: Micromorfologia, Composição Química e Espécies Ferruginosas dos Filmes Pictóricos

Clio Arqueológica, 2020
Neste trabalho, a composição química e espécies ferruginosas de filmes pictóricos de pinturas rupestres do sítio arqueológico Letreiro da Pedra Riscada (Domingos Mourão, Piauí, Brasil) foram investigadas por fluorescência de raios X e espectroscopia ...
José de Jesus Nunes Júnior, Luis Carlos Duarte Cavalcante   +1 more
doaj   +1 more source

Synthesis and Characterization of Unusual S=1 Fe(0)‐Silyl Complexes Supported by Styrene Ligands

Angewandte Chemie, EarlyView.
Despite the long‐standing importance of iron‐silicon bonds as related to catalysis, high‐spin Fe(0)‐silyl complexes remain a historical synthetic challenge in the field. Herein, we report the first series of high‐spin S = 1, styrene‐stabilized Fe(0)‐silyl complexes followed by extensive characterization via Mössbauer spectroscopy, single crystal X‐ray ...
Alexis K. Bauer, Agamemnon E. Crumpton, Michael L. Neidig   +2 more
wiley   +2 more sources

Preparation and characterization of α-Fe nanowires located inside double wall carbon nanotubes [PDF]

, 2008
Capillary effect was used to fill double wall carbon nanotubes (DWCNT) with iron. The samples are characterized by Mössbauer and Raman spectroscopies, TEM, SAED, and magnetization.
Belandria, Edgar, Broto, Jean-Marc, Flahaut, Emmanuel, Gonzalez, Gema, Gonzalez, Jesus, Gonzalez-Jimenez, Fernando, Jorge, Jose, Raquet, Bertrand   +7 more
core   +3 more sources

Low‐Temperature Reverse Water–Gas Shift Enabled by Magnetically Induced Catalysis

Angewandte Chemie, EarlyView.
Magnetically induced catalysis using standard Cu–Al spinel‐derived catalyst functionalized with carbon‐coated iron nanoparticles enables high CO yield (up to 62%) at mild catalyst and reactor temperatures (estimated at 300°C and determined as 25–123°C, respectively).
Junhui Hu, Lise Marie Lacroix, Jacob Johny, Sourav Ghosh, Elisabeth Hannah Wolf, Jeongmin Ji, Sheng‐Hsiang Lin, Manisha Durai, Alin Benice Schöne, Walid Hetaba, Holger Ruland, Walter Leitner, Alexis Bordet   +12 more
wiley   +2 more sources

Moessbauer and magnetic measurements of superconducting LiFeP

, 2010
The LiFeP sample has been prepared by means of high-temperature solid state reaction. A transition temperature to the superconducting state was found as about 5.5 K by measurements of magnetization versus temperature.
Blachowski, A., Marzec, J., Przewoznik, J., Ruebenbauer, K., Zukrowski, J.   +4 more
core   +1 more source

Ferritins: furnishing proteins with iron [PDF]

, 2016
Ferritins are a superfamily of iron oxidation, storage and mineralization proteins found throughout the animal, plant, and microbial kingdoms. The majority of ferritins consist of 24 subunits that individually fold into 4-α-helix bundles and assemble in ...
A Crow, A Treffry, AG Frey, CC Philpott, DM Lawson, DM Lawson, E Wajnberg, EC Theil, EC Theil, EC Theil, EC Theil, EI Stiefel, ER Bauminger, F Barceló, F Bou-Abdallah, FA Fischbach, FA Fischbach, FH Kadir, FHA Kadir, GC Ford, GC Papaefthymiou, GD Watt, GD Watt, Geoffrey R. Moore, GR Moore, H Abdul-Tehrani, H Aitken-Rogers, H Shi, H Yao, H Yao, H Yao, J Yariv, J-F Ma, JD López-Castro, JD Mancias, JM Bradley, JM Bradley, JS Rohrer, Justin M. Bradley, L Swartz, L Toussaint, MA Quail, MJ O’Connell, ML Vasil, MR Cheesman, ND Chasteen, NE Brun Le, NE Brun Le, NE Brun Le, Nick E. Le Brun, NM Reid, O Sadeghi, P Arosio, P Doig, PD Hempstead, PL Ringeling, PM Harrison, PM Harrison, RF Boyer, RJ Ward, RK Behera, RP Garg, S Bereswill, S Granick, S Granick, S Levi, S Macedo, S Mann, S Mann, S Pfaffen, SC Andrews, SC Andrews, SG Wong, SK Weeratunga, T Asano, T Douglas, T Jones, T Tosha, TJ Stillman, TV O’Halloran, TZ Kidane, V Laufberger, VJ Wade, WH Massover, X Liu, X Yang, Y Ha, Y Wang, YH Pan   +88 more
core   +1 more source

Mechanochemical Synthesis of Cu2MgSn3S8 and Ag2MgSn3S8 [PDF]

, 2020
Two new thiospinels of the type AI2BIICIV3SVI8 were successfully synthesized via a mechanochemical route using binary sulfides and sulfur. Cu2MgSn3S8 and Ag2MgSn3S8 are the first AI2BIICIV3SVI8 compounds with magnesium as divalent cation.
Heppke, Eva Maria, Janka, Oliver, Klenner, Steffen, Lerch, Martin, Pöttgen, Rainer   +4 more
core   +1 more source

Proximity Engineering of Fe‒N4 Twins for Oriented Generation of Singlet Oxygen for Hospital Wastewater Treatment

Angewandte Chemie, EarlyView.
Precise modulation of Fe–N4 site distances constructs spin‐regulated Fe–N4 twins, triggering a volcano‐type Fenton‐like activity and promoting oriented singlet oxygen generation. The twin‐site catalyst enables highly selective and efficient hospital wastewater purification with simultaneous pharmaceutical degradation and disinfection under low ...
Xinhao Wang, Zhaokun Xiong, Shuai Yang, Hongyu Zhou, Yanbiao Shi, Zelin Wu, Bingkun Huang, Lei Yang, Chuan‐Shu He, Xiaoguang Duan, Bo Lai   +10 more
wiley   +2 more sources

Study of the Effect of Quenching on Microstructural and Magnetic Properties of Cu-Doped Mg-Ferrite

Advances in Condensed Matter Physics, 2022
Mg1-xCuxFe2O4 (x = 0.0–0.5) was prepared by the double sintering ceramic method, which sintered at 1100°C and 1200°C for 3 hours and investigated for structural, microstructural, and magnetic properties as a function of the Cu content and cooling process.
Apurba Poddar, Suman Halder, S.I. Liba, Sheikh Manjura Hoque, Shibendra Shekher Sikder   +4 more
doaj   +1 more source

Mössbauer Spectroscopy as a Valuable Analysis Technique in Biomedical Research

CHIMIA
Mössbauer spectroscopy is an effective technique used to examine the iron atom electronic environments in both biomolecular molecules and whole animal studies. Because of its sensitivity to nuclear hyperfine interactions, this technique yields incredibly
Jasim Hassen, Jack Silver
doaj   +1 more source