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Methylated inorganic compounds

Natural fresh waters contain only trace amounts of tin (0.01-1 xg/l), with concentrations of about 3 xg/l in sea water. Aquatic organisms can accumulate tin (bioconcentration factor is 10 -10 ). Some microorganisms may methylate inorganic compounds and dealkylate synthetic organometallic compounds. Tin concentrations in soils are in the range of 2-200 mg/kg dry matter. [Pg.455]

Elemental and inorganic compounds Manganese cyclopenta-dienyl tricarbonyl as Mn Manganese methyl-pentadienyl tricarbonyl Manganese tetroxide Man-made mineral fibre Marble, see Calcium carbonate Mercaptoacetic acid, see Thioglycolic acid Mequinol (INN)... [Pg.163]

Organoarsenic compounds have been of importance in human toxicology but have not as yet received much attention in regard to environmental effects. Like methyl mercury compounds, they are both synthesized in the environment from inorganic forms and released into the environment as a consequence of human activity (Environmental Health Criteria 18). They can cause neurotoxicity. [Pg.178]

To help prevent this, the U. S. Public Health Service has recommended a maximum limit of 0.5 ppm mercury in any food. If the fish are to have less than this level of methyl mercury and the concentration factor is 3,000, then the surrounding water in which the fish live should have less than 0.16 ppb (parts per billion). Currently the oceans have about 0.1 ppb, but it is not known whether this is in the form of organic or inorganic compounds.8 It is also not known whether fish can convert inorganic mercury into methyl mercury.8 However, a large number of microorganisms can do this, so possibly its usual form is unimportant. [Pg.426]

Pongratz and Hunmann [19], using differential pulse anodic scanning voltammetry, found low levels of methyl cadmium compounds in the Atlantic Ocean. Levels in the South Atlantic were approximately 700 pg/1, and those in the North Atlantic were below the detection limit of the method, i.e., below 470 pg/1. It is believed that these compounds were formed as a result of biomethylation of inorganic cadmium. [Pg.459]

Tin is shown to be methylated by organisms and other environmental factors. Organic tin compounds are much more toxic than the inorganic ones. This increase in toxicity due, e.g., to methylation is attributable to the increasing membrane permeability of the methylated metal compounds and to the remaining sensibility to react with sulfhydryl groups of proteins, especially of enzyme proteins. [Pg.896]

Sakurai, T., Kaise, T., and Matsuara, C., Inorganic and Methylated Arsenic Compounds Induce Cell Death in Murine Macrophages Via Different Mechanisms, Chem. Res. Toxicol., 11, 273, 1998. [Pg.288]

HgCl2 in the presence of estuarine sediments showed distinct seasonal variation, whose rhythm apparently relates to the seasonal ability of the microorganisms to carry out biomethylation (755, 156). The ability of different river sediments to perform biomethylation depended markedly on the nature of the sediments (157, 158) thus, organic sediments reacted appreciably faster than coarse sand. Activated sludge will methylate inorganic mercury compounds under both sterile and nonsterile conditions, suggesting the presence of both biotic and abiotic pathways (159). [Pg.331]

Inorganic compounds (includes organometallic compounds) Hydrocarbons C,-C5 (aliphatic) n-Decane di-n-decyl phthalate dimethyl sulfolane neopentyl glycol succinate 1,2,3-tris (2-cyanoethoxy) propane SE-30 (methyl silicone phases) Carbowax 400-1500 most branched and substituted phthalate, sebacate, succinate, and adipate phases octadecane squalane (boiling point separations) methyl silicones... [Pg.39]

FeS2, etc. [i]. Polar organic liquids such as acetonitrile, y-butyrolactone, dimethylsulfoxide, 1,2-dimethoxyethane, dioxolane, propylene carbonate, and methyl formate are the most common solvents for electrolyte solutions in primary Li cells. Thionyl chloride (SOCI2 ) and sulfuryl chloride (SO2CI2) are inorganic compounds that serve as both the solvent and the active cathode material in primary Li batteries [i]. [Pg.407]

Braman, R., Johnson, D., Foreback, C., Ammons, J., and Bricker, J. Separation and determination of nanogram amounts of inorganic arsenic and methyl arsenic compounds. Anal. Chem. [Pg.735]

Inorganic and methylated organoarsenic compounds have been converted to their diethyldithiocarbamate or trimethylsilyl derivatives prior to determination by gas chromatography. [Pg.214]

Andreae and coworkers analyzed two polluted rivers in Germany for inorganic and methylated antimony compounds . Sb(III), Sb(V) and methylstibonic acid in the Rhine River at Oppenheim and the Main River at Frankfurt were 0.4, 231.0 and 1.2, and 0.3, 311.0 and 1.8 ppb, respectively. Dimethylstibinic acid was not detected. [Pg.742]

From a toxicological point of view, alkyl-Hg, especially methyl mercury compounds, are usually more toxic than inorganic species (HgCl2, Hg , Hg ). The same is true for tin. [Pg.669]


See other pages where Methylated inorganic compounds is mentioned: [Pg.259]    [Pg.426]    [Pg.1226]    [Pg.165]    [Pg.232]    [Pg.1322]    [Pg.425]    [Pg.301]    [Pg.461]    [Pg.70]    [Pg.1485]    [Pg.846]    [Pg.548]    [Pg.492]    [Pg.329]    [Pg.1485]    [Pg.28]    [Pg.31]    [Pg.340]    [Pg.233]    [Pg.159]    [Pg.96]    [Pg.336]    [Pg.714]    [Pg.255]    [Pg.736]    [Pg.745]    [Pg.747]    [Pg.736]    [Pg.745]    [Pg.747]    [Pg.120]    [Pg.27]   
See also in sourсe #XX -- [ Pg.29 ]




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Inorganic Methylation

Inorganic compounds

Methyl compounds

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