Results 21 to 30 of about 4,042,661 (337)

Functional role of PilA in iron acquisition in the cyanobacterium Synechocystis sp. PCC 6803.

open access: yesPLoS ONE, 2014
Cyanobacteria require large quantities of iron to maintain their photosynthetic machinery; however, in most environments iron is present in the form of insoluble iron oxides.
Jacob J Lamb   +3 more
doaj   +1 more source

Safety and efficacy of iron oxide black, red and yellow for all animal species

open access: yesEFSA Journal, 2016
Iron oxides black, red and yellow are intended to be used as colourings to add and restore colour to feedingstuffs at a recommended concentration between 500 and 1,200 mg/kg. No data on the tolerance of target animals were provided. The iron oxides black,
EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP)
doaj   +1 more source

Functional glass-ceramic foams from \u2018inorganic gel casting\u2019 and sintering of glass/slag mixtures [PDF]

open access: yes, 2018
The here described investigation was essentially aimed at exploring the chemical stabilization and reutilization of iron-rich slag from copper metallurgy, by the manufacturing of glass-ceramic foams.
Bernardo, Enrico   +2 more
core   +1 more source

Oxygen Isotope Labeling Experiments Reveal Different Reaction Sites for the Oxygen Evolution Reaction on Nickel and Nickel Iron Oxides

open access: yesAngewandte Chemie, 2019
Nickel iron oxide is considered a benchmark nonprecious catalyst for the oxygen evolution reaction (OER). However, the nature of the active site in nickel iron oxide is heavily debated.
Seunghwan Lee   +3 more
semanticscholar   +1 more source

The geologic history of seawater oxygen isotopes from marine iron oxides

open access: yesScience, 2019
Not as hot as we thought Earth's early oceans appear not to have been as hot as some have suggested. The oxygen isotope composition of marine carbonates has changed markedly over the past 3.5 billion years.
Nir Galili   +17 more
semanticscholar   +1 more source

Iron oxides dynamics in a subtropical Brazilian Paleudult under long-term no-tillage management

open access: yesScientia Agricola, 2013
Replacing conventional tillage (CT) with no-tillage (NT) management alters the pedoenvironment and the rate of topsoil processes, with possible effects on dissolution processes associated with iron oxides and therefore soil mineralogy.
Alberto Vasconcellos Inda   +4 more
doaj   +1 more source

Iron oxides selectively stabilize plant‐derived polysaccharides and aliphatic compounds in agricultural soils

open access: yesEuropean Journal of Soil Science, 2019
A strong link exists between iron oxides and soil organic carbon (SOC). However, the role of iron oxides in the preservation of SOC in agricultural soil remains poorly understood.
Dan Wan   +5 more
semanticscholar   +1 more source

Comprehensive evaluation of manganese oxides and iron oxides as metal substrate materials for constructed wetlands from the perspective of water quality and greenhouse effect

open access: yesEcotoxicology and Environmental Safety, 2021
Manganese oxides and iron oxides have been widely introduced in constructed wetlands (CWs) for sewage treatment due to their extensiveness in nature and their ability to participate in various reactions, but their effects on greenhouse gas (GHG ...
Shiyi Cheng   +6 more
doaj   +1 more source

Iron oxides as efficient sorbents for CO2 capture

open access: yesJournal of Materials Research and Technology, 2019
Carbon dioxide capture/release reactions using magnetite, Fe3O4, and hematite, Fe2O3, as sorbents were studied. Kinetics of mechanically activated chemical reactions between iron oxides and CO2 was investigated as a function of CO2 pressure and planetary
Eduin Yesid Mora Mendoza   +6 more
doaj   +1 more source

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