scholarly journals The Role of Redox Processes in Determining the Iron Isotope Compositions of Minerals, Melts, and Fluids

2021 ◽  
pp. 303-330
Author(s):  
Paolo A. Sossi ◽  
Baptiste Debret
Keyword(s):  
Redox Processes ◽  
Iron Isotope

Role of ion exchange in the redox processes of a polyaniline film studied by an ac quartz crystal microbalance

1990 ◽  
Vol 290 (1-2) ◽  
pp. 269-274 ◽  
Author(s):  
S. Cordoba-Torresi ◽  
C. Gabrielli ◽  
M. Keddam ◽  
H. Takenouti ◽  
R. Torresi
Keyword(s):  
Ion Exchange ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Redox Processes ◽  
Polyaniline Film

scholarly journals Role of Redox Processes in the Pedogenesis of Hypersaline Tidal Flat Soils on the Brazilian Coast

2018 ◽  
Vol 82 (5) ◽  
pp. 1217-1230 ◽  
Author(s):  
Lucas Resmini Sartor ◽  
Robert C. Graham ◽  
Samantha C. Ying ◽  
Xosé Luis Otero ◽  
Célia Regina Montes ◽  
...  
Keyword(s):  
Tidal Flat ◽  
Brazilian Coast ◽  
Redox Processes

scholarly journals The role of coordination in catalytic redox processes

1971 ◽  
Vol 27 (1-2) ◽  
pp. 251-264 ◽  
Author(s):  
K. B. Yatsi-Mirskii
Keyword(s):  
Redox Processes

Differential photodynamic response of cultured cells to methylene blue and toluidine blue: role of dark redox processes

2009 ◽  
Vol 8 (3) ◽  
pp. 371 ◽  
Author(s):  
Alfonso Blázquez-Castro ◽  
Juan C. Stockert ◽  
Francisco Sanz-Rodríguez ◽  
Alicia Zamarrón ◽  
Angeles Juarranz
Keyword(s):  
Methylene Blue ◽  
Toluidine Blue ◽  
Cultured Cells ◽  
Redox Processes

scholarly journals Fractional crystallization causes the iron isotope contrast between mid-ocean ridge basalts and abyssal peridotites

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Yanhong Chen ◽  
Yaoling Niu ◽  
Meng Duan ◽  
Hongmei Gong ◽  
Pengyuan Guo
Keyword(s):  
Fractional Crystallization ◽  
Trace Element Geochemistry ◽  
Iron Isotope ◽  
Element Geochemistry ◽  
Mid Ocean Ridge ◽  
Atlantis Bank ◽  
The Indian Ocean ◽  
Ocean Ridge ◽  
Melt Evolution

AbstractThe iron isotope contrast between mid-ocean ridge basalts and abyssal peridotites is far greater than can be explained by mantle melting alone. Here we investigate a suite of mid-ocean ridge magma chamber rocks sampled by the Ocean Drilling Project Hole 735B in the Atlantis Bank of the Indian Ocean. We report major and trace element geochemistry from these rocks and measure their iron isotope compositions to investigate the potential role of fractional crystallization during melt evolution. We observe a large range of δ56Fe that defines a significant inverse curvilinear correlation with bulk rock MgO/FeOT. These data confirm that δ56Fe in the melt increases as fractional crystallization proceeds but, contrary to expectation, δ56Fe continues to increase even when oxides begin to crystallize. We conclude that iron isotope fractionation through fractional crystallization during the evolution of mid-ocean ridge basalts from abyssal peridotites reconciles the disparity in isotopic compositions between these two lithologies.

Role of redox processes in the formation of small-for-date fetus syndrome in unfavourable ecological zones

1997 ◽  
Vol 78 (6) ◽  
pp. 423-427
Author(s):  
S. V. Tsurkan ◽  
O. I. Lineva ◽  
F. N. Gilmiyarova ◽  
M. Yu. Zasypkin
Keyword(s):  
Redox Processes ◽  
Ecological Zones

Проведено комбинированное обследование 255 беременных женщин, проживающих в различных экологических зонах Самарской области, с акцентом на оценку внутриутробного состояния плода. Значительные изменения выявлены в неблагоприятных экологических зонах: высокая частота симметричных форм синдрома маловесного плода, нарушения в системе антиоксидантной защиты, выражающиеся в угнетении ферментативной активности (каталазы и глутатионредуктазы), снижение содержания ионизированного железа и мочевой кислоты как показателя активности перекисного окисления липоидов и водородного дефицита, а также снижение пластических резервов организма.

Sulfur in the marine environment

2012 ◽  
Vol 41 (2) ◽  
Author(s):  
Anita Jasińska ◽  
Dorota Burska ◽  
Jerzy Bolałek
Keyword(s):  
Heavy Metals ◽  
Ion Concentration ◽  
Redox Processes ◽  
Natural Conditions ◽  
Ion Balance ◽  
The Past ◽  
Comprehensive Knowledge ◽  
Benthic Sediments ◽  
Source Of Information

AbstractSulfur is an element commonly occurring in the environment. It is present in the atmosphere, in the hydrosphere, and in live organisms; it is one of the most important physicochemical and geological indicators. Depending on the natural conditions, sulfur compounds in the environment may play the role of electron acceptor or donor in the redox processes. These compounds influence the ion concentration and ion balance in benthic sediments. They also determine the speciation, bioavailability and toxicity of heavy metals. Comprehensive knowledge of the processes mediated by sulfur can be a valuable source of information about the past and present state of the ecosystem.

Sign in / Sign up

Export Citation Format

Share Document