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Biogeochemical cycle of Fe2+/Fe3+
The iron cycle (Fe) is the biogeochemical cycle of iron through the atmosphere, hydrosphere, biosphere and lithosphere. While Fe is highly abundant in
Iron_cycle
Chemical element with atomic number 26 (Fe)
of iron ore is located. The Mesabi Iron Range is the chief iron ore mining district in the United States. Iron and steel industry Iron cycle Iron nanoparticle
Iron
For chemical reactions, the iron oxide cycle (Fe3O4/FeO) is the original two-step thermochemical cycle proposed for use for hydrogen production. It is
Iron_oxide_cycle
Bacteria deriving energy from dissolved iron
carrying out an important step in the biogeochemical cycle within the OMZ. The microbial ferrous iron oxidation metabolic strategy (found in Archaea and
Iron-oxidizing_bacteria
Marine biogeochemical cycles Marine biogeochemical cycles are biogeochemical cycles that occur within marine environments, that is, in the saltwater of
Marine_biogeochemical_cycles
Chemical process
sponge iron reaction (SIR) is a chemical process based on redox cycling of an iron-based contact mass, the first cycle is a conversion step between iron metal
Sponge_iron_reaction
Class of chemical compounds composed of iron and oxygen
of magnetic recording tapes. Iron oxide is also a component of iron-air batteries. Great Oxidation Event Iron cycle Iron oxide nanoparticle Limonite List
Iron_oxide
Biogeochemical cycle
The phosphorus cycle is the biogeochemical cycle that involves the movement of phosphorus through the lithosphere, hydrosphere, and biosphere. Unlike
Phosphorus_cycle
sulfur cycles, anaerobic ammonium oxidation with iron reduction, and sulfur-driven iron reduction highlight the interconnectedness of these cycles in terrestrial
Dissimilatory iron reducing bacteria
Dissimilatory_iron_reducing_bacteria
Biogeochemical cycle by which nitrogen is converted into various chemical forms
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmospheric, terrestrial
Nitrogen_cycle
1884 chart predicting market cycles
Benner's cycle describes a theorized economic phenomenon named after Ohioan farmer Samuel Benner, who in 1872 produced a chart that references historical
Benner's_cycle
Chemical transfer pathway between Earth's biological and non-biological parts
biogeochemical cycles include the carbon cycle, the nitrogen cycle and the water cycle. In each cycle, the chemical element or molecule is transformed and cycled by
Biogeochemical_cycle
occurs in the summer. The iron cycle can fluctuate the forms of iron from aqueous to particle forms altering the availability of iron to primary producers
Iron_in_biology
Mechanism that maintains marine microbial diversity
(10): 1465–1476. doi:10.1093/plankt/fbr041. Moore, J. Keith, et al. "Iron cycling and nutrient-limitation patterns in surface waters of the World Ocean
Viral_shunt
cycle – Glaciation – Gold cycle – Iodine cycle – Iron cycle – Lead cycle – Lithium cycle – Manganese cycle – Mass extinction cycles – Mercury cycle –
List_of_cycles
Pathway that chemical elements take in the surface and crust of the Earth
geochemical cycles: Deep water cycle Deep carbon cycle (is part of carbon cycle) Iron cycle Carbonate–silicate cycle Phosphorus cycle Sulfur cycle Rock cycle Mercury
Geochemical_cycle
Type of rechargeable battery without cobalt
lithium iron phosphate battery (LiFePO 4 battery) or LFP battery (lithium ferrophosphate) is a type of lithium-ion battery using lithium iron phosphate
Lithium iron phosphate battery
Lithium_iron_phosphate_battery
Hypothetical middle to late Proterozoic ocean composition
Ariel D.; Kappler, Andreas; Konhauser, Kurt O. (2012-04-20), "The Global Iron Cycle", in Knoll, Andrew H.; Canfield, Donald E.; Konhauser, Kurt O. (eds.)
Canfield_ocean
American farmer and pioneer of cyclical price forecasting
recurring nine-year cycle in pig iron prices, along with cycles in corn, hog, and cotton prices and in financial panics. His pig iron forecast was later
Samuel_Turner_Benner
Order of bacteria
ferrous iron (Fe2+) ions into ferric hydroxide (Fe(OH)3) during autotrophic growth, and thus have roles in the carbon cycle and the iron cycle. As such
Nitrosomonadales
Biogeochemical cycle
gold biogeochemical cycle is highly complex and strongly intertwined with cycling of other metals including silver, copper, iron, manganese, arsenic,
Gold_cycle
History of the Trojan War told in poems
of Iron Age Greece. In modern scholarship, the study of the historical and literary relationship between the Homeric epics and the rest of the cycle is
Epic_Cycle
Grouping of Irish myths
conclude that the stories of the Ulster Cycle preserved authentic Celtic traditions from the pre-Christian Iron Age. Other scholars have challenged that
Ulster_Cycle
Essential elements required by organisms
elements such as iron, strontium, and manganese. Micronutrient abundance in the environment greatly influences biogeochemical cycles at the microbial
Micronutrient
Chemical compound with an oxygen atom
dissolution of ferric oxides is integral to geochemical phenomena such as the iron cycle. Because the M–O bonds are typically strong, metal oxides tend to be insoluble
Oxide
Interconnected biochemical reactions releasing energy
The citric acid cycle—also known as the Krebs cycle, Szent–Györgyi–Krebs cycle, or TCA cycle (tricarboxylic acid cycle)—is a series of biochemical reactions
Citric_acid_cycle
Biogeochemical cycle for movement of water on Earth
The water cycle (or hydrologic cycle or hydrological cycle) is a biogeochemical cycle that involves the continuous change in form of water on, above and
Water_cycle
Method for producing hydrogen and carbon monoxide from hydrocarbon fuels
Hydrogen) Partial oxidation PROX Reformed methanol fuel cell Reformer sponge iron cycle Syngas Timeline of hydrogen technologies Liu, Ke; Song, Chunshan; Subramani
Steam_reforming
Water from a sea or an ocean
important part of the ocean's iron cycle. The advantageous relationship between krill and baleen whales increases the amount of iron that can be recycled and
Seawater
Fossil fuel derived from other hydrocarbon sources
combined cycle – Technology to turn coal into syngas Partial oxidation – Oxidation process stopping before full combustion Reformer sponge iron cycle – Chemical
Syngas
Natural changes in the human female reproductive system
The menstrual cycle is a series of natural changes in hormone production and the structures of the uterus and ovaries of the female reproductive system
Menstrual_cycle
contributing to the iron cycle in varying water masses. The isotopically light iron in intermediate waters suggests that the dominant iron sources include
Trace metal stable isotope biogeochemistry
Trace_metal_stable_isotope_biogeochemistry
Cycle of Satya, Treta, Dvapara and Kali yugas (ages) in Hindu cosmology
A yuga cycle (a.k.a. chatur yuga, maha yuga, etc.) is a cyclic age (epoch) in Hindu cosmology. Each cycle lasts for 4,320,000 years (12,000 divine years)
Yuga_cycle
Metal dust
Wet cycle: storage of energy and generation of hydrogen using iron powders Dry cycle: storage of energy, production of heat and electricity using iron powders
Iron_powder
Negative-pressure mechanical respirator
cylinder is cycled to facilitate inhalation and exhalation. Devices like the Drinker, Emerson, and Both respirators are examples of iron lungs, which
Iron_lung
Biogeochemical cycle of sulfur
The sulfur cycle is a biogeochemical cycle in which the sulfur moves between rocks, waterways and living systems. It is important in geology as it affects
Sulfur_cycle
Ecological concept
Whales also cycle iron to the upper ocean: They consume iron-rich organisms in deep water, then defecate at the surface, providing iron fertilizer that
Iron_fertilization
European cycling network
the addition of two new routes — EuroVelo 13 (the Iron Curtain Trail) and EuroVelo 15 (the Rhine Cycle Route) — in September 2011, which are the longest
EuroVelo
2012 science-fiction comedy film
Iron Sky is a 2012 science fiction comedy action film directed by Timo Vuorensola, who co-wrote the screenplay with Michael Kalesniko from a story by Johanna
Iron_Sky
Organism using inorganic substrate to obtain reducing equivalents for use in biosynthesis
Calvin cycle, a metabolic pathway in which CO2 is converted to glucose. This group of organisms includes sulfur oxidizers, nitrifying bacteria, iron oxidizers
Lithotroph
European cycling route
The Iron Curtain Trail (ICT), also known as EuroVelo 13 (EV13), is a long-distance cycling route along the route of the former Iron Curtain, from the
EV13_The_Iron_Curtain_Trail
Type of furnace used for smelting to produce industrial metals
metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air
Blast_furnace
Type of dam
(SRB) can indirectly influence the iron cycle in mine tailings by reacting with soluble iron (Fe (II)) to form iron sulfide precipitates. Although sulfate-reducing
Tailings_dam
Natural processes of carbon exchange
The carbon cycle is a part of the biogeochemical cycle where carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere
Carbon_cycle
Group of bacteria
the carbon cycle through carbon fixation. Purple sulfur bacteria also contribute to the phosphorus cycle in their habitat, and the iron cycle. Through upwelling
Purple_sulfur_bacteria
Autotrophic members of the plankton ecosystem
A.; Boyd, P. W. (2016). "Marine phytoplankton and the changing ocean iron cycle". Nature Climate Change. 6 (12): 1072–1079. Bibcode:2016NatCC...6.1072H
Phytoplankton
Insufficient level of copper in the body, leading to anaemia and nervous symptoms
is impaired. This cycle ultimately causes myelopathy. The anemia caused by copper deficiency is thought to be caused by impaired iron transport. Hephaestin
Copper_deficiency
Long-distance cycling routes are designated cycling routes in various countries around the world for bicycle tourism. These routes include anything from
Long-distance_cycling_route
American bicycle manufacturer
owns Pacific Cycle, along with Cannondale, GT, Mongoose and Schwinn brands. Wikimedia Commons has media related to Iron Horse Bicycles. Iron Horse Bicycles
Iron_Horse_Bicycles
Study of chemical cycles of the earth related to biological activity
is placed on the study of carbon, nitrogen, oxygen, sulfur, iron, and phosphorus cycles. Biogeochemistry is a systems science closely related to systems
Biogeochemistry
The selenium cycle is a biological cycle of selenium similar to the cycles of carbon, nitrogen, and sulfur. Within the cycle, there are organisms which
Selenium_cycle
Reduced ability of the blood to carry oxygen due to a lack of iron
per cycle. Some birth control methods, such as pills and IUDs, may decrease the amount of blood and therefore iron lost during a menstrual cycle. Intermittent
Iron-deficiency_anemia
Biogeochemical cycle
necessary element for biological processes. It is cycled through the Earth in similar ways to iron, but with distinct redox pathways. Human activities
Manganese_cycle
2025 American Disney Jr. superhero series
Iron Man and His Awesome Friends, also known as Marvel's Iron Man and His Awesome Friends, is a preschool animated series directed by Michael Dowding
Iron Man and His Awesome Friends
Iron_Man_and_His_Awesome_Friends
Political boundary dividing Europe during the Cold War
The Iron Curtain was the political and physical boundary that divided Europe from the end of World War II in 1945 until the end of the Cold War in 1990/1991
Iron_Curtain
1999 studio album by Hood
The Cycle of Days and Seasons is a full-length album by the Leeds-based band Hood. Both the LP and CD versions were released on Domino Records in 1999
The_Cycle_of_Days_and_Seasons
Flat area on the deep ocean floor
of Fiji found those vents to be a significant source of dissolved iron (see iron cycle). Hydrothermal vents in the deep ocean typically form along the mid-ocean
Abyssal_plain
Anoxic extinction event in the Cretaceous period
disturbances in the ocean's nitrogen, oxygen, phosphorus, sulfur, and iron cycles. The Cenomanian and Turonian stages were first noted by D'Orbigny between
Cenomanian–Turonian boundary event
Cenomanian–Turonian_boundary_event
This is a list of countries by mined iron ore production in 2024 based on U.S. Geological Survey data. "Usable iron ore" figures refer to the processed
Lists of countries by mineral production
Lists_of_countries_by_mineral_production
Type of rechargeable battery
batteries to survive frequent cycling is due to the low solubility of the reactants in the electrolyte. The formation of metallic iron during charge is slow because
Nickel–iron_battery
Marvel Comics fictional character
powers so that the cycle of the Iron Fist could begin again and took a wife who bore him thirteen sons. Bei Bang-Wen's successor to the Iron Fist, Kwai Jun-Fan
Iron_Fist_(character)
Iron in its +2 oxidation state
acquisition of iron". Plant and Soil, volume 165, issue 2, pages 261–274. doi:10.1007/BF00008069 Petsch, S.T. (2014). "10.11 - The Global Oxygen Cycle". In Holland
Ferrous
Historic pillar in the Mehrauli district of Delhi, India
The iron pillar of Delhi is a metal structure 7.21 metres (23 feet 8 inches) high with a 41-centimetre (16 in) diameter that was constructed by Chandragupta
Iron_pillar_of_Delhi
Hydrogen exchange between the living and non-living world
The hydrogen cycle consists of hydrogen exchanges between biotic (living) and abiotic (non-living) sources and sinks of hydrogen-containing compounds
Hydrogen_cycle
Outcome of seawater as it freezes
K.; Holland, M. (8 September 2014). "Impact of sea ice on the marine iron cycle and phytoplankton productivity". Biogeosciences. 11 (17): 4713–4731. Bibcode:2014BGeo
Sea_ice
Process of layering steel or iron with zinc to prevent rusting
galvanisation) is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which
Galvanization
Biogeochemical cycle
The mercury cycle is a biogeochemical cycle influenced by natural and anthropogenic processes that transform mercury through multiple chemical forms and
Mercury_cycle
Series of reactions in cellular respiration
intermembrane space, per two-cycle process. Ubiquinol (QH2) binds to the Qo site of complex III via hydrogen bonding to His182 of the Rieske iron-sulfur protein and
Q_cycle
Biogeochemical cycle
The ozone–oxygen cycle is the process by which ozone is continually regenerated in Earth's stratosphere, converting ultraviolet radiation (UV) into heat
Ozone–oxygen_cycle
Type of furnace once used widely for smelting iron from its oxides
and compaction cycles, working at high 'welding' temperatures. Iron treated this way is said to be wrought (worked), and the resulting iron, with reduced
Bloomery
Transfer of calcium between dissolved and solid phases
The calcium cycle is a transfer of calcium between dissolved and solid phases. There is a continuous supply of calcium ions into waterways from rocks
Calcium_cycle
(chirpsounder) ionosphere ionospheric reflection ionospheric sounding iron cycle irradiance irradiation isobar isochore (in a thermodynamic diagram) isodrosotherm
Index_of_meteorology_articles
In computer architecture, the iron law of processor performance (or simply iron law of performance) describes the performance trade-off between complexity
Iron law of processor performance
Iron_law_of_processor_performance
State in which a body lacks enough iron to supply its needs
Iron deficiency, or sideropenia, is the state in which a body lacks enough iron to supply its needs. Iron is present in all cells in the human body and
Iron_deficiency
Shared-use path in Iron Cove, Sydney
863538; 151.15355 The Bay Run is a 7-kilometre-long pedestrian and cycling circuit around Iron Cove passing through the suburbs of Rozelle, Lilyfield, Haberfield
The_Bay_Run
Geographically located ocean measurement site
P. W. (December 2016). "Marine phytoplankton and the changing ocean iron cycle". Nature Climate Change. 6 (12): 1072–1079. Bibcode:2016NatCC...6.1072H
Station P (ocean measurement site)
Station_P_(ocean_measurement_site)
Type of flow battery technology
Iron redox flow batteries (IRFB), (aka iron salt battery), uses the electrochemical reaction of iron salt. It belongs to the class of redox-flow batteries
Iron_redox_flow_battery
Abnormal accumulation of iron in the body
fertility and menstrual cycle in women. metabolism: diabetes in people with iron overload occurs as a result of selective iron deposition in islet beta
Iron_overload
Pipe made of ductile cast iron
Ductile iron pipe is pipe made of ductile cast iron commonly used for potable water transmission and distribution. This type of pipe is a direct development
Ductile_iron_pipe
Neighborhood in New York City
area in London's West End. Almost all of SoHo is included in the SoHo–Cast Iron Historic District, which was designated by the New York City Landmarks Preservation
SoHo,_Manhattan
Class of enzymes
acid cycle, is converted to fluorocitrate by citrate synthase. Fluorocitrate competitively inhibits aconitase halting the citric acid cycle. The iron–sulfur
Aconitase
Group of alloys
; Hall, M.B. (2006). "Density functional study of the catalytic cycle of nickel-iron NiFe hydrogenases and the involvement of high-spin nickel(II)". Journal
Iron–nickel_alloy
Italian researcher
2017). "The influence of Antarctic subglacial volcanism on the global iron cycle during the Last Glacial Maximum". Nature Communications. 8 (1) 15425.
Silvia_Frisia
Iron (II) disulfide mineral
pyrite (/ˈpaɪraɪt/ PY-ryte), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula FeS2 (iron (II) disulfide). Pyrite is
Pyrite
Chemical reaction
hydrogen is not released but rather used ionically to drive the Calvin cycle. The reverse of water splitting is the basis of the hydrogen fuel cell.
Water_splitting
Movement of water in the deep Earth
The deep water cycle, or geologic water cycle, involves exchange of water with the mantle, with water carried down by subducting oceanic plates and returning
Deep_water_cycle
Layered iron-rich sedimentary rock
Banded iron formations (BIFs; also called banded ironstone formations) are distinctive units of sedimentary rock consisting of alternating layers of iron oxides
Banded_iron_formation
Gorge on the river Danube between Serbia and Romania
spawning grounds and areas used at other times in their life cycle. The construction of the Iron Gates had a major impact on the local fauna and flora as
Iron_Gates
Series of books by Christopher Paolini
The Inheritance Cycle is a tetralogy of young adult high fantasy novels written by American author Christopher Paolini. Set in the fictional world of
The_Inheritance_Cycle
The iodine cycle is a biogeochemical cycle that primarily consists of natural and biological processes that exchange iodine through the lithosphere, hydrosphere
Iodine_cycle
19 solar year recurrence of lunar phases
itself being several centuries older, created in the Iron Age or late Bronze Age. The Metonic cycle is thought to be numerically encoded on the Berlin Gold
Metonic_cycle
Movement of carbon through Earth's mantle and core
carbon cycle (or slow carbon cycle) is geochemical cycle (movement) of carbon through the Earth's mantle and core. It forms part of the carbon cycle and
Deep_carbon_cycle
Biogeochemical cycle
The chromium cycle is the biogeochemical cycle of chromium through the atmosphere, hydrosphere, biosphere and lithosphere. Chromium has two common oxidation
Chromium_cycle
Intervals of expansion and recession in economic activity
Business cycles are intervals of general expansion followed by recession in economic performance. The changes in economic activity that characterize business
Business_cycle
Hypothesized cycle-like phenomena in the modern world economy
economic cycle) are hypothesized cycle-like phenomena in the modern world economy. The phenomenon is closely connected with the technology life cycle. It is
Kondratiev_wave
Exchange of vanadium between continental crust and seawater
incorporation into iron oxides at hydrothermal vents. Biological processes play a relatively minor role in the global vanadium cycle. Vanadium bromoperoxidase
Vanadium_cycle
Changes to stars over their lifespans
over 1 M☉ (2.0×1030 kg), the carbon–nitrogen–oxygen fusion reaction (CNO cycle) contributes a large portion of the energy generation. The onset of nuclear
Stellar_evolution
materials. This is a table of characteristics common to rechargeable batteries. Cycle life can be significantly affected by factors such as the ambient temperature
Comparison of commercial battery types
Comparison_of_commercial_battery_types
The copper cycle is the biogeochemical cycle of natural and anthropogenic exchanges of copper between reservoirs in the hydrosphere, atmosphere, biosphere
Copper_cycle
Biogeochemical cycle
The silica cycle is the biogeochemical cycle in which biogenic silica is transported between the Earth's systems. Silicon is one of the most abundant
Silica_cycle
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