Manganese
Manganese Poisoning
Superoxide Dismutase
Molecular Structure
Iron
Cloning and characterization of a cDNA encoding a novel extracellular peroxidase from Trametes versicolor. (1/400)
The white rot basidiomycete Trametes versicolor secretes a large number of peroxidases which are believed to be involved in the degradation of polymeric lignin. These peroxidases have been classified previously as lignin peroxidases or manganese peroxidases (MnP). We have isolated a novel extracellular peroxidase-encoding cDNA sequence from T. versicolor CU1, the transcript levels of which are repressed by low concentrations of Mn2+ and induced by nitrogen and carbon but not induced in response to a range of stresses which have been reported to induce MnP expression. (+info)A functional model for O-O bond formation by the O2-evolving complex in photosystem II. (2/400)
The formation of molecular oxygen from water in photosynthesis is catalyzed by photosystem II at an active site containing four manganese ions that are arranged in di-mu-oxo dimanganese units (where mu is a bridging mode). The complex [H2O(terpy)Mn(O)2Mn(terpy)OH2](NO3)3 (terpy is 2,2':6', 2"-terpyridine), which was synthesized and structurally characterized, contains a di-mu-oxo manganese dimer and catalyzes the conversion of sodium hypochlorite to molecular oxygen. Oxygen-18 isotope labeling showed that water is the source of the oxygen atoms in the molecular oxygen evolved, and so this system is a functional model for photosynthetic water oxidation. (+info)Manganese sulfate-dependent glycosylation of endogenous glycoproteins in human skeletal muscle is catalyzed by a nonglucose 6-P-dependent glycogen synthase and not glycogenin. (3/400)
Glycogenin, a Mn2+-dependent, self-glucosylating protein, is considered to catalyze the initial glucosyl transfer steps in glycogen biogenesis. To study the physiologic significance of this enzyme, measurements of glycogenin mediated glucose transfer to endogenous trichloroacetic acid precipitable material (protein-bound glycogen, i.e., glycoproteins) in human skeletal muscle were attempted. Although glycogenin protein was detected in muscle extracts, activity was not, even after exercise that resulted in marked glycogen depletion. Instead, a MnSO4-dependent glucose transfer to glycoproteins, inhibited by glycogen and UDP-pyridoxal (which do not affect glycogenin), and unaffected by CDP (a potent inhibitor of glycogenin), was consistently detected. MnSO4-dependent activity increased in concert with glycogen synthase fractional activity after prolonged exercise, and the MnSO4-dependent enzyme stimulated glucosylation of glycoproteins with molecular masses lower than those glucosylated by glucose 6-P-dependent glycogen synthase. Addition of purified glucose 6-P-dependent glycogen synthase to the muscle extract did not affect MnSO4-dependent glucose transfer, whereas glycogen synthase antibody completely abolished MnSO4-dependent activity. It is concluded that: (1) MnSO4-dependent glucose transfer to glycoproteins is catalyzed by a nonglucose 6-P-dependent form of glycogen synthase; (2) MnSO4-dependent glycogen synthase has a greater affinity for low molecular mass glycoproteins and may thus play a more important role than glucose 6-P-dependent glycogen synthase in the initial stages of glycogen biogenesis; and (3) glycogenin is generally inactive in human muscle in vivo. (+info)Suppression of a nuclear aep2 mutation in Saccharomyces cerevisiae by a base substitution in the 5'-untranslated region of the mitochondrial oli1 gene encoding subunit 9 of ATP synthase. (4/400)
Mutations in the nuclear AEP2 gene of Saccharomyces generate greatly reduced levels of the mature form of mitochondrial oli1 mRNA, encoding subunit 9 of mitochondrial ATP synthase. A series of mutants was isolated in which the temperature-sensitive phenotype resulting from the aep2-ts1 mutation was suppressed. Three strains were classified as containing a mitochondrial suppressor: these lost the ability to suppress aep2-ts1 when their mitochondrial genome was replaced with wild-type mitochondrial DNA (mtDNA). Many other isolates were classified as containing dominant nuclear suppressors. The three mitochondrion-encoded suppressors were localized to the oli1 region of mtDNA using rho- genetic mapping techniques coupled with PCR analysis; DNA sequencing revealed, in each case, a T-to-C nucleotide transition in mtDNA 16 nucleotides upstream of the oli1 reading frame. It is inferred that the suppressing mutation in the 5' untranslated region of oli1 mRNA restores subunit 9 biosynthesis by accommodating the modified structure of Aep2p generated by the aep2-ts1 mutation (shown here to cause the substitution of proline for leucine at residue 413 of Aep2p). This mode of mitochondrial suppression is contrasted with that mediated by heteroplasmic rearranged rho- mtDNA genomes bypassing the participation of a nuclear gene product in expression of a particular mitochondrial gene. In the present study, direct RNA-protein interactions are likely to form the basis of suppression. (+info)Extracellular heavy-metal ions stimulate Ca2+ mobilization in hepatocytes. (5/400)
Populations of hepatocytes in primary culture were loaded with fura 2 and the effects of extracellular heavy-metal ions were examined under conditions that allowed changes in fura 2 fluorescence (R340/360, the ratio of fluorescence recorded at 340 and 360 nm) to be directly attributed to changes in cytosolic free [Ca2+] ([Ca2+]i). In Ca2+-free media, Ni2+ [EC50 (concentration causing 50% stimulation) approximately 24+/-9 microM] caused reversible increases in [Ca2+]i that resulted from mobilization of the same intracellular Ca2+ stores as were released by [Arg8]vasopressin. The effects of Ni2+ were not mimicked by increasing the extracellular [Mg2+], by addition of MnCl2, CoCl2 or CdCl2 or by decreasing the extracellular pH from 7.3 to 6.0; nor were they observed in cultures of smooth muscle, endothelial cells or pituitary cells. CuCl2 (80 microM), ZnCl2 (80 microM) and LaCl3 (5 mM) mimicked the ability of Ni2+ to evoke Ca2+ mobilization. The response to La3+ was sustained even in the absence of extracellular Ca2+, probably because La3+ also inhibited Ca2+ extrusion. Although Ni2+ entered hepatocytes, from the extent to which it quenched fura 2 fluorescence the free cytosolic [Ni2+] ([Ni2+]i) was estimated to be <5 nM at the peak of the maximal Ni2+-evoked Ca2+ signals and there was no correlation between [Ni2+]i and the amplitude of the evoked increases in [Ca2+]i. We conclude that extracellular Ni2+, Zn2+, Cu2+ and La3+, but not all heavy-metal ions, evoke an increase in [Ca2+]i in hepatocytes by stimulating release of the hormone-sensitive intracellular Ca2+ stores and that they may do so by interacting with a specific cell-surface ion receptor. This putative ion receptor may be important in allowing hepatocytes to contribute to regulation of plasma heavy-metal ions and may mediate responses to Zn2+ released into the portal circulation with insulin. (+info)Characterization of the actin binding properties of the vasodilator-stimulated phosphoprotein VASP. (6/400)
The vasodilator-stimulated phosphoprotein (VASP) colocalizes with the ends of stress fibers in cell-matrix and cell-cell contacts. We report here that bacterially expressed murine VASP directly interacts with skeletal muscle actin in several test systems including cosedimentation, viscometry and polymerization assays. It nucleates actin polymerization and tightly bundles actin filaments. The interaction with actin is salt-sensitive, indicating that the complex formation is primarily based on electrostatic interactions. Actin binding is confined to the C-terminal domain of VASP (EVH2). This domain, when expressed as a fusion protein with EGFP, associates with stress fibers in transiently transfected cells. (+info)Alteration of iron homeostasis following chronic exposure to manganese in rats. (7/400)
Recent studies suggest that manganese-induced neurodegenerative toxicity may be partly due to its action on aconitase, which participates in cellular iron regulation and mitochondrial energy production. This study was performed to investigate whether chronic manganese exposure in rats influenced the homeostasis of iron in blood and cerebrospinal fluid (CSF). Groups of 8-10 rats received intraperitoneal injections of MnCl2 at the dose of 6 mg Mn/kg/day or equal volume of saline for 30 days. Concentrations of manganese and iron in plasma and CSF were determined by atomic absorption spectrophotometry. Rats exposed to manganese showed a greatly elevated manganese concentration in both plasma and CSF. The magnitude of increase in CSF manganese (11-fold) was equivalent to that of plasma (10-fold). Chronic manganese exposure resulted in a 32% decrease in plasma iron (p<0.01) and no changes in plasma total iron binding capacity (TIBC). However, it increased CSF iron by 3-fold as compared to the controls (p<0.01). Northern blot analyses of whole brain homogenates revealed a 34% increase in the expression of glutamine synthetase (p<0.05) with unchanged metallothionein-I in manganese-intoxicated rats. When the cultured choroidal epithelial cells derived from rat choroid plexus were incubated with MnCl2 (100 microM) for four days, the expression of transferrin receptor mRNA appeared to exceed by 50% that of control (p<0.002). The results indicate that chronic manganese exposure alters iron homeostasis possibly by expediting unidirectional influx of iron from the systemic circulation to cerebral compartment. The action appears likely to be mediated by manganese-facilitated iron transport at brain barrier systems. (+info)Improved DNA sequencing accuracy and detection of heterozygous alleles using manganese citrate and different fluorescent dye terminators. (8/400)
The use of dideoxynucleotide triphosphates labeled with different fluorescent dyes (dye terminators) is the most versatile method for automated DNA sequencing. However, variation in peak heights reduces base-calling accuracy and limits heterozygous allele detection, favoring use of dye-labeled primers for this purpose. We have discovered that the addition of a manganese salt to the PE Applied Biosystems dye-terminator sequencing kits overcomes these limitations for the older rhodamine dyes as well as the more recent dichloro-rhodamine dyes (dRhodamine and BigDyes). Addition of manganese to reactions containing dRhodamine-based dye terminators produced the highest base-calling accuracy. This combination resulted in the most uniform electropherogram profiles, superior to those produced by BigDye terminators and published for dye primers, and facilitated detection of heterozygous alleles. (+info)Manganese compounds refer to substances that contain manganese (Mn) combined with other elements. Manganese is a trace element that is essential for human health, playing a role in various physiological processes such as bone formation, enzyme function, and antioxidant defense. However, excessive exposure to manganese compounds can be harmful and may lead to neurological disorders.
Manganese can form compounds with various elements, including oxygen, chlorine, sulfur, and carbon. Some common examples of manganese compounds include:
* Manganese dioxide (MnO2): a black or brownish-black powder used in dry cell batteries, ceramics, and pigments.
* Manganese sulfate (MnSO4): a white or grayish-white crystalline solid used as a fertilizer and in animal feed supplements.
* Manganese chloride (MnCl2): a colorless or white solid used as a dehydrating agent, in electroplating, and as a source of manganese ions in chemical reactions.
* Manganese carbonate (MnCO3): a white or grayish-white powder used in the production of dry cell batteries, ceramics, and pigments.
It is important to note that while manganese compounds are essential for human health in small amounts, exposure to high levels of these substances can be toxic and may cause neurological symptoms similar to those seen in Parkinson's disease. Therefore, it is important to handle manganese compounds with care and follow appropriate safety precautions when working with them.
Manganese is not a medical condition, but it's an essential trace element that is vital for human health. Here is the medical definition of Manganese:
Manganese (Mn) is a trace mineral that is present in tiny amounts in the body. It is found mainly in bones, the liver, kidneys, and pancreas. Manganese helps the body form connective tissue, bones, blood clotting factors, and sex hormones. It also plays a role in fat and carbohydrate metabolism, calcium absorption, and blood sugar regulation. Manganese is also necessary for normal brain and nerve function.
The recommended dietary allowance (RDA) for manganese is 2.3 mg per day for adult men and 1.8 mg per day for adult women. Good food sources of manganese include nuts, seeds, legumes, whole grains, green leafy vegetables, and tea.
In some cases, exposure to high levels of manganese can cause neurological symptoms similar to Parkinson's disease, a condition known as manganism. However, this is rare and usually occurs in people who are occupationally exposed to manganese dust or fumes, such as welders.
Manganese poisoning, also known as manganism, is a condition that results from excessive exposure to manganese. Manganese is an essential nutrient, but at high levels, it can become toxic to the body. The symptoms of manganese poisoning can be similar to those of Parkinson's disease and may include tremors, difficulty walking, and mood changes. In severe cases, manganese poisoning can lead to irreversible neurological damage. Exposure to manganese can occur through inhalation, ingestion, or skin contact, and is often associated with occupational exposure in industries such as welding, mining, and manufacturing of batteries and fertilizers.
Medical Definition:
Superoxide dismutase (SOD) is an enzyme that catalyzes the dismutation of superoxide radicals (O2-) into oxygen (O2) and hydrogen peroxide (H2O2). This essential antioxidant defense mechanism helps protect the body's cells from damage caused by reactive oxygen species (ROS), which are produced during normal metabolic processes and can lead to oxidative stress when their levels become too high.
There are three main types of superoxide dismutase found in different cellular locations:
1. Copper-zinc superoxide dismutase (CuZnSOD or SOD1) - Present mainly in the cytoplasm of cells.
2. Manganese superoxide dismutase (MnSOD or SOD2) - Located within the mitochondrial matrix.
3. Extracellular superoxide dismutase (EcSOD or SOD3) - Found in the extracellular spaces, such as blood vessels and connective tissues.
Imbalances in SOD levels or activity have been linked to various pathological conditions, including neurodegenerative diseases, cancer, and aging-related disorders.
Molecular structure, in the context of biochemistry and molecular biology, refers to the arrangement and organization of atoms and chemical bonds within a molecule. It describes the three-dimensional layout of the constituent elements, including their spatial relationships, bond lengths, and angles. Understanding molecular structure is crucial for elucidating the functions and reactivities of biological macromolecules such as proteins, nucleic acids, lipids, and carbohydrates. Various experimental techniques, like X-ray crystallography, nuclear magnetic resonance (NMR) spectroscopy, and cryo-electron microscopy (cryo-EM), are employed to determine molecular structures at atomic resolution, providing valuable insights into their biological roles and potential therapeutic targets.
In the context of medicine, iron is an essential micromineral and key component of various proteins and enzymes. It plays a crucial role in oxygen transport, DNA synthesis, and energy production within the body. Iron exists in two main forms: heme and non-heme. Heme iron is derived from hemoglobin and myoglobin in animal products, while non-heme iron comes from plant sources and supplements.
The recommended daily allowance (RDA) for iron varies depending on age, sex, and life stage:
* For men aged 19-50 years, the RDA is 8 mg/day
* For women aged 19-50 years, the RDA is 18 mg/day
* During pregnancy, the RDA increases to 27 mg/day
* During lactation, the RDA for breastfeeding mothers is 9 mg/day
Iron deficiency can lead to anemia, characterized by fatigue, weakness, and shortness of breath. Excessive iron intake may result in iron overload, causing damage to organs such as the liver and heart. Balanced iron levels are essential for maintaining optimal health.
Peroxidases are a group of enzymes that catalyze the oxidation of various substrates using hydrogen peroxide (H2O2) as the electron acceptor. These enzymes contain a heme prosthetic group, which plays a crucial role in their catalytic activity. Peroxidases are widely distributed in nature and can be found in plants, animals, and microorganisms. They play important roles in various biological processes, including defense against oxidative stress, lignin degradation, and host-pathogen interactions. Some common examples of peroxidases include glutathione peroxidase, which helps protect cells from oxidative damage, and horseradish peroxidase, which is often used in laboratory research.
Manganese(II) acetate
Manganese(II) carbonate
Manganese deficiency (plant)
Manganese(II) nitrate
Manganese
Manganese(II) chloride
Manganese(II) sulfate
Sodium manganate
Potassium permanganate
Potassium manganate
Potassium hypomanganate
Manganese cycle
Barium manganate
Colossal magnetoresistance
Double-exchange mechanism
Manganese(II) oxide
Technetium compounds
Manganate
Homoleptic azido compounds
Group 7 element
Potassium dimanganate(III)
Gallium manganese arsenide
Manganese(III) fluoride
Manganese(II) phthalocyanine
Chromium
Fluid balance
Daily consumption of drinking water
Drinking water
Manganese peroxidase
Manganese diselenide
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Rhenium- and manganese-catalyzed synthesis of aromatic compounds from 1,3-dicarbonyl compounds and alkynes<...
Compounds containing, besides manganese, two or more other elements, with the exception of oxygen or hydrogen | TREA
Research Highlights 2016 | Max Planck Institute for Chemical Physics of Solids
The stability of inclusion compounds under heating: PPart I. Inclusion compounds of microporous manganese formate with included...
A putative multicopper protein secreted by an atypical type II secretion system involved in the reduction of insoluble electron...
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Metallic Glazes
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No. 13 of 2007
Oxides8
- describes foreign trade operations with manganese oxides in the CIS countries, provides data on the volume of imports of the products under study. (infomine.ru)
- by the dose (how much), the Inhaled manganese can be directly substance found mainly as oxides, minor route of exposure for the general duration (how long), and the transported to the brain and can result in carbonates, and silicates. (cdc.gov)
- The chemical formula for manganese oxides can be expressed as MnO2x(H2O).n. (mis-asia.com)
- Non-functional ceramic glazes having very high percentages of metallic oxides/carbonates (manganese, copper, cobalt, chrome). (digitalfire.com)
- Other metal oxides like copper and cobalt are also active fluxes and melt even better than manganese, but they are prone to forming crystals during cooling (the micro-crystals of copper completely matte the surface). (digitalfire.com)
- These chemical compounds are either oxides or carbonates. (drlwilson.com)
- Manganese oxides have been used as a pigment since prehistoric times. (espimetals.com)
- Fume particles contain a wide variety of oxides and salts of metals and other compounds, which are produced mainly from electrodes, filler wire and flux materials. (who.int)
Dioxide20
- Manganese dioxide - used for dry-cell batteries and ferrites - is produced by manipulating this process. (azocleantech.com)
- Manganese dioxide has an inorganic chemical compound, MnO2. (mis-asia.com)
- Manganese dioxide is both an acidic and alkalinity. (mis-asia.com)
- 2. Manganese dioxide can be described as an amphoteric ore, with corresponding salts such as BaMnO3 / SrMnO3 (obtained through a compound reaction within a molten acidi system [1]), and also manganese tetrachloride. (mis-asia.com)
- In order to produce manganese oxide (manganese dioxide), heat the manganese in a hydrogen stream at 1400K. (mis-asia.com)
- Then, in order to create manganese dioxide, heat the manganese in ammonia streams to melt manganese bioxide. (mis-asia.com)
- When manganese dioxide and potassium carbonate as well as potassium nitrate and potassium chlorate can be mixed, it can melt to a dark brown color. (mis-asia.com)
- In organic chemistry, manganese dioxide can be very helpful. (mis-asia.com)
- This is because manganese dioxide has many crystalline forms. (mis-asia.com)
- You can make manganese dioxide by reacting potassium permanganate with manganese sodium sulfate at different pH. (mis-asia.com)
- The conversion of alcohols and aldehydes is one chemical reaction that manganese dioxide has. (mis-asia.com)
- No matter how double-bonded alcohols are, manganese dioxide won't oxidize them. (mis-asia.com)
- By using manganese dioxide, diols can become dialdehydes. (mis-asia.com)
- You can use manganese dioxide to react with many other compounds, such as aromatics, trils and amines. (mis-asia.com)
- Manganese dioxide is used to decompose potassium permanganate. (mis-asia.com)
- Metallic glazes can most easily be produced in oxidation by mixing a very high percentage of manganese dioxide with a low melting frit . (digitalfire.com)
- Instead of relying on organic carbon, which is a very scarce resource in the cave, they use the energy in nitrogen-containing compounds like ammonia and nitrite to convert carbon dioxide from the air into biomass. (science20.com)
- Manganese dioxide has been used in the manufacture of glass to remove color caused by iron impurities and as a pigment in glass, ceramics and paint. (espimetals.com)
- Manganese dioxide(an inorganic compound with the formula MnO. (tatayoung.com)
- Manganese dioxide is a good candidate for effective energy storage and conversion as it possesses rich electrochemistry. (lu.se)
Chromium1
- Fumes from the welding of stainless-steel and other alloys contain nickel compounds and chromium[VI] and [III]. (who.int)
Copper3
- It can thus be beneficial to incorporate some copper or cobalt with the manganese in the recipe to promote the desired amount of crystallization. (digitalfire.com)
- Cobalt and copper have crystallized during cooling, manganese has formed an iridescent glass. (digitalfire.com)
- 1.1 These test methods cover the determination of lead, zinc, copper, and manganese in raw rubber and rubber compounds, vulcanized or unvulcanized. (astm.org)
Carbonate4
- Manganese(II) acetate can be formed by treating either manganese(II,III) oxide or manganese(II) carbonate with acetic acid: Mn3O4 + 2 CH3CO2H → Mn(CH3CO2)2 + Mn2O3 + H2O MnCO3 + 2 CH3CO2H → Mn(CH3CO2)2 + CO2 + H2O The anhydrous material and dihydrate Mn(CH3CO2)2·2H2O are coordination polymers. (wikipedia.org)
- Manganese carbonate derived from lithium-ion batteries' black mass has several chemical applications. (azocleantech.com)
- Manganese carbonate also has applications in medicine as a hematinic, is used in health foods, and is employed in the production of ceramics and concrete. (azocleantech.com)
- 2022 ), we characterized the three major hydrological regimes of the lake, focussing on the variations of precipitation and sedimentation processes of endogenic carbonates, i.e., calcite and calcium carbonate phosphate, relating the presence of these compounds to natural and human-driven processes. (springer.com)
Based Heusler compounds4
- Manganese-based Heusler compounds are studied with the focus on their magnetocrystalline anisotropy and exchange interaction, in order to obtain a general model for this class of compounds. (mpg.de)
- We have succeeded to derive the governing factors of phase stability for transition metal based Heusler compounds. (mpg.de)
- By applying simple rules combined with first-principles calculations it was possible to predict structure, disorder, magnetic and electrical properties of Mn- and Ni-based Heusler compounds. (mpg.de)
- Iron-based Heusler compounds Fe 2 YZ: Comparison with theoretical predictions of the crystal structure and magnetic properties. (mpg.de)
Fumes4
- occur by inhalation of manganese fumes distributed throughout the body, with areas is 40 ng/m3. (cdc.gov)
- There is very important caution regarding the use of these recipes: Manganese fumes (produced during firing) are toxic, you must have a kiln venting system that works properly. (digitalfire.com)
- Upon learning that his patient had been welding for 25 years, and knowing that welding fumes contain manganese, a toxic metal, the specialist suggested the symptoms were work related. (motherjones.com)
- Since the lawsuits began in the 1970s, the position of the $5 billion welding-products industry had remained consistent: There are no reliable scientific data to prove welding fumes cause the Parkinson's-like syndrome known as parkinsonism-or "manganism" if manganese-related-that many longtime welders experience. (motherjones.com)
COBALT1
- Compounds of naphthenic acid with metals, usually cobalt or manganese, used to accelerate oxidation of an ink film. (printing.org)
Inorganic compound2
- Magnesium nutride An inorganic compound of nitrogen and magnesium. (actionext.com)
- Magnesium-nitride, an inorganic compound made up of magnesium and nitrogen, has a molecular form of Mg3N2 (molecular weight 100.9494). (actionext.com)
Manganism1
- Hazards: Chronic inhalation of high levels of manganese may result in a syndrome called manganism with symptoms similar to Parkinson's disease. (espimetals.com)
Magnetism2
Oxidation1
- Unfortunately compound ( 6 ) failed to undergo effective oxidation to the anthracycline ( 7 ) using lead(IV) acetate. (google.com)
Calcium2
- Manganese (Mn2+) uptake was used as a measure of calcium channel function and as an index of SNA. (cdc.gov)
- Fluoride helps stabilize the mineral content of bones and teeth by forming a stable compound with calcium and thus helps prevent tooth decay. (msdmanuals.com)
Potassium1
- Once the melt is dissolved in water, you can cool the mixture down to produce potassium manganate which is a compound of high-valent manganese. (mis-asia.com)
IRON7
- I am also amazed at the product's chemical composition, capable of removing manganese, iron, other metallic compounds, and organic molecules from the resin matrix. (usawaterquality.org)
- Cementite can be described as a metal compound made of iron, carbon and has the chemical formula Fe3C. (actionext.com)
- The colour could come from the progressive deposition of iron and manganese compounds. (photomacrography.net)
- According to Wilfried Schönborn, Beschalte Amöben (Testaceae), Wittenberg, 1966, p.18 the brown colour is coming from iron and the violet colour from manganese. (photomacrography.net)
- This class of deposit comprises compounds of iron or manganese and is known as a chemical sediment, because the mineral constituents are transported in solution and then precipitated to form a sediment as a result of chemical reaction . (britannica.com)
- Particle elemental composition was mainly iron and manganese. (who.int)
- In Canadian welders, personal exposures to manganese ranged from 0.01-4.93 mg/m3 and to iron ranged from 0.04-16.29 mg/m3 in eight Canadian welding companies in Manitoba. (who.int)
Organic chemistry1
- Manganese compounds are used as gasoline additives, as a reagent in organic chemistry, and in batteries. (espimetals.com)
Neurological1
- Manganese is released into the An MRL of 0.0003 mg Mn/m3 has been neurological effects. (cdc.gov)
Chlorine1
- Finally, react with concentrated hydrochloric acids to form chloride manganese and chlorine. (mis-asia.com)
Metals1
- A reliable water softener cleanser must not only remove common water softener debris, but also remove heavy metals, organic compounds, and even microorganisms. (usawaterquality.org)
Stable1
- Manganese carbonide is a stable, manganese-carbon-based compound. (actionext.com)
Brittle2
- Characteristics: Pure manganese is a hard, very brittle metal which cannot be fabricated. (espimetals.com)
- Pfleiderer has already been researching the hard and brittle manganese silicon for 18 years as it is just right for his magnetic measurements and easy to produce as single crystals. (mytum.de)
Welders3
- Overexposure to manganese has caused Parkinson's-like symptoms for thousands of welders. (motherjones.com)
- For several years, US District Judge Kathleen O'Malley-whose Ohio courtroom is the fact-finding venue for Tamraz and hundreds of other cases-had watched lawyers squabble over disclosure of alleged payments to researchers studying the effects of manganese on welders. (motherjones.com)
- Welders who weld painted mild steel can also be exposed to a range of organic compounds produced by pyrolysis. (who.int)
Powder1
- Manganese III Oxide (or Manganese trioxide) is a white powder without odor. (cookingmamacookoff.com)
Oxygen1
- In the center of the oxygen evolving complex (OEC) was attacked by studies by Yachandra and coworkers (17-19), it was concluded a manganese-bridging oxo group. (lu.se)
Pesticides1
- Common organic manganese compounds include pesticides, such as maneb or mancozeb, and methylcyclopentadienyl manganese tricarbonyl (MMT), a fuel additive in some gasolines. (cdc.gov)
Soluble1
- Uranyl compounds tend to be soluble in groundwater, whereas U 4+ compounds are not. (britannica.com)
Fertilizer1
- Some of these compounds are used as a catalyst and as fertilizer. (wikipedia.org)
Arsenic1
- Inorganic or organic compounds that contain arsenic. (bvsalud.org)
Formula1
- Manganese(II) acetate are chemical compounds with the formula Mn(CH3CO2)2·(H2O)n where n = 0, 2, 4. (wikipedia.org)
Toxic1
- There may be other minerals that can form these toxic compounds, as well. (drlwilson.com)
Alloys2
- Applications: The largest use of manganese is in metal alloys. (espimetals.com)
- Manganese is used in many steel alloys and aluminum alloys to improve strength, malleability and corrosion resistance. (espimetals.com)
Cycloaddition2
- The first approach is a manganese-catalyzed [2+2+2] cycloaddition between 1,3-dicarbonyl compounds, which have no substituents at the active methylene moiety, and terminal alkynes. (elsevierpure.com)
- The second approach is a rhenium- or manganese-catalyzed formal [2+1+2+1] cycloaddition between β-keto esters and two kinds of alkynes. (elsevierpure.com)
Hydrogen1
- Carbide powders are binary compounds formed from carbon (except hydrogen) with less or similar electronegativity. (actionext.com)
Chemicals1
- The NPG presents key data for 677 chemicals or substance groupings (such as cyanides, fluorides, manganese compounds) that are found in workplaces. (cdc.gov)
Derivatives1
- In conclusion, the Mn2+-complex appears as an excellent lead for the design of new phenanthroline derivatives as alternative compounds for preventing oxidative damages and oxidative stress - related diseases. (bvsalud.org)
Magnetic4
- Manganese-rich Heusler-compounds with large out-of-plane magnetization and large saturation magnetization have been designed for new magnets whereas a high magneto crystalline anisotropy and low magnetic moment for future magnetic random access technologies (MRAM) and spin torque oscillators for wireless communication. (mpg.de)
- Manganese uptake was examined in vivo with manganese-enhanced magnetic resonance imaging (MEMRI) in key auditory brain regions implicated in tinnitus. (cdc.gov)
- Physicists from the Technische Universität München (TUM) and the University of Cologne have discovered a new type of magnetic ordering in the metallic compound manganese silicon. (mytum.de)
- The magnetic moments in manganese silicon normally form a helix. (mytum.de)
Electrodes1
- Following Jeff's diagnosis, the couple, who live in Grants Pass, Oregon, hired a lawyer and sued Lincoln Electric and four other makers of manganese-containing welding wire and electrodes-also called rods or sticks. (motherjones.com)
Metallic3
- Al SiC (alluminum silicon carbide) is a metallic-based thermal management compound made up of silicon carbide and aluminum. (actionext.com)
- Sebastian Mühlbauer, doctoral student with Professor Peter Böni at the TUM Department for Experimental Physics, was originally meant to measure something completely different in relation to the metallic compound of manganese-silicon. (mytum.de)
- [ 1 ] Extrinsic dental stains are caused by predisposing factors and other factors such as dental plaque and calculus, foods and beverages, tobacco, chromogenic bacteria, metallic compounds, and topical medications. (medscape.com)
Abstract1
- abstract = "(Chemical Equation Presented) We have succeeded in the development of three approaches to the synthesis of aromatic compounds from 1,3-dicarbonyl compounds and alkynes. (elsevierpure.com)
Acidic1
- The amigos are alkaline mineral compounds to temporarily help acidic bodies survive. (drlwilson.com)
Elemental1
- Exposure limits: ACGIH/TLV: elemental and inorganic compounds 0.02 mg/m3 (respirable), OSHA: compounds and fume, 5 mg/m3 (ceiling). (espimetals.com)
Mineral1
- Sexual fluid is also rich in these mineral compounds. (drlwilson.com)
Calculations1
- Test of band structure calculations for Heusler compounds by spin-resolved photoemission spectroscopy. (mpg.de)
Grains2
- the highest concentrations of across the gastrointestinal tract is may only be related to exposure dose manganese are found in grains, nuts, variable, but typical y averages about 3- after exposure has ceased. (cdc.gov)
- Manganese can be found in several food items, including grains and cereals, and is found in high amounts in other foods, such as tea. (cdc.gov)
Mimics2
- PURPOSE: Manganese porphyrins are redox-active drugs and superoxide dismutase mimics, which have been shown to chemosensitize lymphoma, a cancer which frequently occurs in dogs. (duke.edu)
- A large number of synthetic compounds have been described as antioxidant enzyme mimics, capable of eliminating ROS and/or reducing oxidative damage. (bvsalud.org)
Differently1
- These defects differently affect the electrochemistry of manganese oxide, and tailoring their amount in the structure can be used to tune the material properties. (lu.se)
Found2
- Manganese is a naturally occurring metal that is found in many types of rocks. (cdc.gov)
- Pure manganese is not found as a free element in nature, but is found in many minerals, principally pyrolusite, braunite, and psilomelane. (espimetals.com)
Phosphate1
- In wastewater, P exists as one of several possible phosphate compounds including orthophosphate, polyphosphates, and organic phosphate (Crites and Tchobanoglous 1998). (ufl.edu)
Particles1
- Manganese is an essential nutrient particles or nanosized particles deposited most indicative of recent exposures. (cdc.gov)
Exposure3
- The primary source of manganese current exposure to manganese. (cdc.gov)
- Sex differences in sensitivity to prenatal and early childhood manganese exposure on neuromotor function in adolescents. (cdc.gov)
- INTRODUCTION: While studies have suggested that exposure to manganese (Mn) may be associated with neurodevelopment in school-age children, there is limited information on prenatal and postnatal Mn exposures and tremor or motor function in children. (cdc.gov)