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searching for Iron compounds 104 found (233 total)

alternate case: iron compounds

Iron metallic discoloration (66 words) [view diff] exact match in snippet view article find links to article

metallic discoloration occurred more frequently in the past when soluble iron compounds were used in the treatment of allergic contact and other dermatitis

titanium, 0.05–0.15% vanadium, 0.10–0.25% zirconium, 0.40% silicon-iron compounds, and up to 0.15% trace elements.: 3  The density of 2519 aluminium is

and pink or reddish browns, depending on the other minerals present. Iron compounds give the reddish-browns. In addition to being unsightly and hard to

Organoiron chemistry is the chemistry of iron compounds containing a carbon-to-iron chemical bond. Organoiron compounds are relevant in organic synthesis

the formula and enhance the absorption of iron by the infant. When iron compounds are added to soy-based infant formula, the iron compound is encapsulated

are produced by groundwater that alters the oxidation state of the iron compounds in the earth. The Candy Cane Mountains contain numerous belemnites and

distinguished from the terms hypervalent and hypercoordinate, as high-valent iron compounds neither necessarily violate the 18-electron rule nor necessarily show

different iron compounds. When the old geyser basin was active, the "cooking" of the rock caused chemical alterations in these iron compounds. Exposure

released by plant roots and by some microorganisms, can solubilize iron compounds in the soil. For example ferric hydroxide reacts with citrates to give

to Lake Bonney. This ecosystem survives by transforming sulfur and iron compounds for growth. The work is seen as a stage in developing an autonomous

spherical. The adhesive part of the cell may be colored brown from iron compounds. The cell contains a single parietal chloroplast, which may be cup-shaped

orange-brown "rusty" colour which is very distinctive. The aluminum and ferric iron compounds in the subsoil also tend to bind the soil particles together, giving

through upper Wisconsin and Michigan. They are characterized by bands of iron compounds and chert. Enough oxygen had accumulated in seawater so that dissolved

nuclear states are known. In ferromagnetic materials, including many iron compounds, the natural internal magnetic fields are quite strong and their effects

solid conductor/electron acceptor. Two commonly observed acceptors are iron compounds (specifically Fe(III) oxides) and manganese compounds (specifically

is reduced by the presence of sulfur, and the newly mixed sulfur and iron compounds begin to float back up towards the outer core. Iron and sulfur, which

These materials are charged in batches into a blast furnace where the iron compounds in the ore give up excess oxygen and become liquid iron. At intervals

greyish color, but is sometimes stained with reddish or pink spots from iron compounds. When the slurry is particularly colorful, the feature may be referred

travertine but is even softer and more porous. Chaybeate springs may deposit iron compounds such as limonite. Some such deposits were large enough to be mined as

progressively lower dips to the west. The sands are coloured due to oxidised iron compounds formed under different conditions. Alum Bay Chine begins as a small

he received a doctorate in chemistry, having submitted a thesis on iron compounds. After Costăchescu, he was the second individual to receive a doctorate

Ludwig; Kühborth, Brigitte; Silver, Jack; Rituper, Rafael (2000). "Iron Compounds". Ullmann's Encyclopedia of Industrial Chemistry. doi:10.1002/14356007

less energy dense and more expensive substances such as cobalt and/or iron compounds found in lithium-ion batteries. Secondly, the use of metallic lithium

as it is one of the very few places where elementary iron (i.e. no iron compounds) can be found. The former mine is now a lake which is popular as a swimming

cyanide and is thus not a reliable marker, yet continues to include the iron compounds in his analysis. Green describe this as "disingenuous". Since a building

1016/S0022-328X(00)82143-9. Fehlhammer, W.P.; Stolzenberg, H. (1982). "Dinuclear Iron Compounds with Hydrocarbon Ligands". In Geoffrey Wilkinson; F. Gordon A. Stone;

(1901), co-authored with Dr. M. S. Pembery The Therapeutics of the Iron Compounds (1904) Collected Papers on Pharmacology and Therapeutics (published

Alaunbach absorbs the seepage water, which is reddish-brown due to iron compounds and which escaped from the alumina and lignite deposits that were also

S2CID 4283321. This paper describes the isostructure chromium and iron compounds. Blake, Antony B.; Yavari, Ahmad; Hatfield, William E.; Sethulekshmi

of iron compounds had resulted in a partial though precarious control of the disease. Filmer and Underwood showed that the beneficial effect of iron compounds

Typical substrates are phenols and typical catalysts are copper and iron compounds and enzymes, although Scholl demonstrated that high heat and a Lewis

1039/dt9760002044. Fehlhammer, W.P.; Stolzenberg, H. (1982). "Dinuclear Iron Compounds with Hydrocarbon Ligands". In Geoffrey Wilkinson; F. Gordon A. Stone;

were maintained. Finally a passivation process removed any surface iron compounds which are a potential source of corrosion. The bridge is featured in

process. The waste, known as 'galligu', was a blue sludge (from reduced iron compounds) dominated by calcium sulphide and smelling of bad eggs. The surface

mottles characteristic of gley soils. The rich colour is the result of iron compounds, mainly complex oxides which, like rust, have a reddish-brown colour

water. At this stage, other components of the ore such as aluminium and iron compounds, are poorly soluble. Acidification of the resulting aqueous extract

responsible for an apparent preconsolidation pressure. The filtration of iron compounds from a very sensitive clay from Labrador, Canada, resulted in a 30 t/m

porosity of the sandstone layers: the orange bands consist of oxidised iron compounds in layers that dry out too quickly for cyanobacteria to multiply; the

and grey, with the colour variations caused by minute impurities of iron compounds. Flint can be coloured: sandy brown, medium to dark grey, black, reddish

of a base of cellulose impregnated with other substances including iron compounds, which are especially prominent in some species of Closterium and Penium

activity such as occurs in top soils and some anaerobic deposits. Magnetic iron compounds can also be found in igneous and metamorphic rocks. The relationship

silicate [Si2O5] sheets bonded to aluminium hydroxide [Al2(OH)4] layers. Iron compounds are the primary coloring agents in saprolites. At most outcrops the

the fields of hematology and oncology. In recent years, three new IV iron compounds have been released. These include, Ferrinject, Iron Isomaltoside and

(Mn2+) form, though iron reduction is more common in soil. The reduced iron compounds cause poorly drained soil to appear gray or blue, and because reduced

combine with metallic atoms to form the destructive oxide compound. These iron compounds are brittle and crumbly and replace strong metallic iron, reducing the

with little to no dissolved oxygen. The rusticle consists of up to 35% iron compounds including iron oxides, iron carbonates, and iron hydroxides. Rusticles

pollution combines with water to form acids that dissolute manganese and iron compounds, causing the fragmentation of the rock varnish and patina. Researchers

and redox reactions caused by wetting and drying of the soil convert iron compounds to oxide maghemite (y-Fe2O3). Associated anthropogenic activities such

result of solution processes by water in complex interactions with iron compounds from neighbouring or intrusive magmatic-volcanic rocks. The variation

via the decahydrate form, since the anhydrous form tends to attract iron compounds and organic compounds. The anhydrous form is easily produced from the

inhibition of inflammatory cytokine secretion by macrophages. Because many iron compounds are pro-inflammatory, the ability of gallium to act as a non-functional

attributed to the chemical reaction of the tannins with the soluble iron compounds present in the fermented mud. The bark, leaves and roots are used by

: 4  Ferricrete – stony particles conglomerated into rock by oxidized iron compounds from ground water Oxisol – Soil type known for occurring in tropical

recognised as the main source of phosphates in the waters of the broads. Iron compounds have been used to precipitate phosphates out of treated sewage in all

includes tourmaline. Also included in the granite are silver, tin and iron compounds, which were mined as early as the 16th century. At the peak of mining

oxidisation of iron, and partial reduction and dehydration of hydrated iron compounds. Several clues led to the hypothesis that different genetic sets exist

Non-stick surface Sous-vide Thermal cooking Acton, Q. Ashton, ed. (2013). Iron Compounds—Advances in Research and Application. Scholarly Editions. p. 508.

in 4-Substituted Bis(imino)pyridines and the Corresponding Reduced Iron Compounds". Organometallics. 31 (6): 2275–2285. doi:10.1021/om201212m. PMC 3366276

incorporated into hemoglobin. The most commonly known and studied bioinorganic iron compounds (biological iron molecules) are the heme proteins: examples are hemoglobin

patients with coeliac disease.2 Zager RA (September 2006). "Parenteral iron compounds: potent oxidants but mainstays of anemia management in chronic renal

metals by their planetary names, e.g. "Saturn" for lead and "Mars" for iron; compounds of tin, iron and silver continued to be called "jovial", "martial"

current just before deposition. All crystal rock contains some iron or iron compounds, rendering it ferromagnetic, as do Roman roof tiles and plaster. These

五洲传播出版社. pp. 169–170. ISBN 9787508500966. Acton, Q. Ashton (2013). Iron Compounds—Advances in Research and Application: 2013 Edition: ScholarlyBrief.

organic matter, hydrogen, methane, reduced sulfur compounds, reduced iron compounds and ammonium. From most negative to least, some acceptors are oxygen

covered in a thick enamel that is colored orange or reddish-brown by iron compounds. The lower incisors have roots that are almost as long as the entire

lost 40–90% of its carbon by evaporation and transport to the core in iron compounds. The most rigorous estimate gives a carbon content of 30 parts per million

colours from a complex multiplicity of mineral pigments: 110  including iron compounds such as iron oxide (ochre),: 204  hematite, and goethite, as well as

silicic acid; any yellowish to reddish or grey coloration is caused by iron compounds and impurities (Pfahlschiefer). The interpretation of the actual Pfahl

1016/0013-9327(78)90055-1. Rasmussen, Keld; Lindegaard, Claus (1988). "Effects of Iron Compounds on Macroinvertebrate Communities in a Danish Lowland River System".

Iron compounds secreted by microorganisms

previously thought to be a result of hearths and burning are actually iron compounds forming as the lake levels dropped in recent times. Lake algae, sponges

ability to remove rust and ink stains. Oxalic acid converts insoluble iron compounds into a soluble complex ion. It is because of this property that oxalic

highest at 770 °C. However, for some ferrimagnetic materials (ceramic iron compounds – ferrites) the Curie point can be close to ambient temperatures (below

sulfates, sulfites, sulfur dioxide, and elemental sulfur; carbon dioxide; iron compounds; manganese compounds; cobalt compounds; and uranium compounds. In aerobic

reminded the ancients of blood. Although the color of the planet is due to iron compounds in combination with oxygen in the Martian soil, it is a common misconception

Sir John Herschel who in 1842 published his investigation of light on iron compounds, expecting that photochemical reactions would reveal, in form visible

260-13: Mossbauer Spectroscopy Standard for the Chemical Shift of Iron Compounds (PDF). National Institute of Standards and Technology. Archived (PDF)

twofold: (1) the prevention of the formation of insoluble and unabsorbable iron compounds and (2) the reduction of ferric to ferrous iron, which seems to be a

associated with copper compounds exchanges with sulfur associated with iron compounds, increasing the iron oxide content of the furnace, and the iron oxides

S2CID 4288012. Neilands, J. B. (1966). "Naturally occurring non-porphyrin iron compounds". Structure and Bonding. Vol. 1. pp. 59–108. doi:10.1007/BFb0119549

If the soil is not acidic enough, many of its nutrients (especially iron compounds) will not be available for the plant, since they will not dilute in

photosynthesizing cyanobacteria produced oxygen that reacted with dissolved iron compounds in the water, to form insoluble iron oxide (rust). The white layers

blocks such transport by oxidizing the iron to form insoluble ferric iron compounds. The end of the deposition of banded iron formation at 1.85 Ga is therefore

(September 12, 2012, white balanced) (raw, close-up, 3-D version). Abundant iron compounds are responsible for the bright brownish-red colour of the martian soil

with a pungent odour. This compound is a common precursor to diverse iron compounds, including many that are useful in organic synthesis. Fe(CO)5 is prepared

Železná hůrka area, iron-rich magma entered coal deposits which caused iron compounds to be reduced to metallic iron, in a process similar to smelting used

colors. These colors are caused by the oxidation of different metals (iron compounds produce red, pink and yellow, decomposition of tuff-derived mica produces

radioactive background of aquifer. In particular, excessive content of iron compounds in water got into compensatory reactions with Strontium thus leading

red coloration due to hematite is caused by the complete oxidation of iron compounds in oxygen-rich bottom waters. The red layers show Fe3+/Fe2+ > 1, whereas

the tailings pile. Water draining from mine adits were treated with iron compounds to precipitate out arsenic solids. OU1 was completed in 2016. OU2 provided

and purple breccias. Often their color depends on the extent of inner iron compounds. They display little assortment or bedding, indicating that they likely

forming the mineral hematite. In some areas, soluble and insoluble iron compounds mix with each other producing a greenish color rock. All these colors

production processes. These included the production of pharmaceutical iron compounds, chemically pure hydrofluoric acid, rubidium, and caesium. Most production

This ratio describes the comparative abundance of highly reactive iron compounds which are only stable without oxygen. Most geological sections corresponding

species also affect the redox-controlled phosphorus cycle. Divalent iron compounds originating from anaerobic sediment layers gradually diffuse and undergo

been used instead of lithium as the electron donor and molybdenum and iron compounds (such as pentacarbonyl iron or ferrocenes) as catalysts, up to 34 equivalents

abundant element in the Earth's crust, solubility of biologically relevant iron compounds is exceedingly low, and is generally insufficient for the needs of most

out of the air and fall on land or water, where they dissolve into iron compounds and salt. Iron salt aerosols may also therefore contribute to iron fertilization

regarded as highly soluble, in many environments with calcium or insoluble iron compounds, arsenate is precipitated just like phosphates are. Arsenite (As(+3))

of the resonance absorption of gamma-quanta by a number of complex iron compounds on taking into account the covalency of the bond and inductive effects"

rocks at Pariwhero vary, depending on the ratio of ferric to ferrous iron compounds in the rock and therefore the extent of oxidisation. Siltstones and

combat anaemia, an ironaddition to the feed in the form of organic iron compounds or iron sulphate is particularly useful. The iron content in the feed

processes and the associated displacement and accumulation of soluble iron compounds. There is also further evidence of paleo-soils such as clay deposits

slag as a waste product. The slag, largely formed of silica, contained iron compounds and other impurities that were separated from the copper ore during