Results 11 to 20 of about 499,152 (305)

Extração de ferro de esmectita brasileira com emprego do método ditionito-citrato-bicarbonato Iron extraction from Brazilian smectite by dithionite-citrate-bicarbonate method

open access: yesQuímica Nova, 2000
A natural clay from Campina Grande region (Paraíba, Brazil), with 8.57% of Fe2O3, was used to study the most appropriate condition to carry out the iron extraction, without altering the clay structure in a significant way.
Sidnei Quezada M. Leite   +3 more
doaj   +1 more source

Novel Extraction Method for Combined Lipid and Metal Speciation From Caenorhabditis elegans With Focus on Iron Redox Status and Lipid Profiling

open access: yesFrontiers in Chemistry, 2021
Parkinson´s disease progression is linked to iron redox status homeostasis via reactive oxygen species (ROS) formation, and lipids are the primary targets of ROS.
Bastian Blume   +6 more
doaj   +1 more source

Sustainable Recycling of Insoluble Rust Waste for the Synthesis of Iron-Containing Perovskite-Type Catalysts [PDF]

open access: yes, 2019
Insoluble rust waste from the scraping of rusted iron-containing materials represents a cheap, eco-friendly, and available source of iron. LaFeO3 perovskite-type powders were successfully prepared by solution combustion synthesis using rust waste from an
Deganello, F.   +5 more
core   +1 more source

Unraveling the Mineralogical Complexity of Sediment Iron Speciation Using Sequential Extractions

open access: yesGeochemistry, Geophysics, Geosystems, 2020
Iron speciation is one of the most widely applied proxies used to reconstruct oxygen levels and redox conditions in past aqueous environments. The iron speciation proxy estimates proportions of different reactive iron species in fine‐grained sedimentary ...
S. P. Slotznick   +7 more
doaj   +1 more source

Avaliação de procedimentos de extração dos óxidos de ferro pedogênicos com ditionito-citrato-bicarbonato de sódio Evaluation of pedogenic iron oxide extraction procedures with sodium dithionite-citrate-bicarbonate

open access: yesRevista Brasileira de Ciência do Solo, 2003
Em 20 amostras hematíticas e goethíticas de horizontes B latossólicos, uma de B plíntico, uma de B incipiente e uma de saprolito, foram avaliados dois procedimentos de extração de óxidos de ferro pedogênicos (Fe d) por ditionito-citrato-bicarbonato de ...
A. V. Inda Junior, N. Kämpf
doaj   +1 more source

An electrochemical investigation of the formation of CoSx and its effect on the anodic dissolution of iron in ammoniacal-carbonate solutions [PDF]

open access: yes, 2013
It has been found that the co-presence of cobalt (II) and thiosulphate ions in ammoniacal-carbonate solutions promotes the passivation of iron, under conditions in which it would otherwise continue to dissolve anodically. Electrochemical experiments have
D'Aloya, A, Nikoloski, A.N.
core   +2 more sources

Hydrous Manganese Oxide Doped Gel Probe Sampler for Measuring In Situ Reductive Dissolution Rates. 2. Field Deployment [PDF]

open access: yes, 2010
In situ rates of reductive dissolution in submerged shoreline sediments at Lake Tegel (Berlin, Germany) were measured with a novel hydrous manganese (Mn) oxide-doped gel probe sampler in concert with equilibrium gel probe and sequential extraction ...
Farnsworth, Claire E.   +3 more
core   +2 more sources

Purification of natural zeolite-clinoptilolite for medical application: Extraction of lead [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
A series of experiments of the leaching of lead and other cations from three samples of natural zeolite-clinoptilolite, (Sample 1-deposit Zlatokop, Vranjska Banja, Serbia and Montenegro; Sample 2-deposit Bala Mare, Romania; Sample 3-Igros near Brus ...
Tomašević-Čanović Magdalena R.
doaj   +3 more sources

Highly efficient CO2 capture with simultaneous iron and CaO recycling for the iron and steel industry [PDF]

open access: yes, 2016
An efficient CO2 capture process has been developed by integrating calcium looping (CaL) and waste recycling technologies into iron and steel production.
Chen, Xuejing   +5 more
core   +1 more source

Nuclear effects and higher twists in F3 structure function [PDF]

open access: yes, 2000
We analyze the CCFR collaboration iron target data on the xF3 structure function making particular emphasis on the extraction of the higher twist contributions from data.
Kulagin, S. A., Sidorov, A. V.
core   +2 more sources

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