Results 131 to 140 of about 3,688,199 (198)

Absorption of methylmercury compounds from rat intestine

Toxicology Letters, 1990
Intestinal absorption of methylmercury complexed with non-protein sulfhydryl compounds (NPSHs) as occurs in bile was studied by means of direct injection of mercury compounds into ligated intestinal segments of rats. The extent of absorption of methylmercury-cysteinylglycine (MM-CysGly) was similar to that of methylmercury-cysteine (MM-Cys) and 1.5 ...
Seiichiro Himeno, Nobumasa Imura, Iwasaki Akiko   +2 more
exaly   +4 more sources

A review of the toxicity of methylmercury compounds with application to occupational exposures associated with laboratory uses

Environmental Research, 1983
The toxicological and physicochemical properties of methylmercury compounds are reviewed together in an attempt to foster a conceptual synthesis between the biochemistry and toxicity of these compounds. Where insights from chemical analysis bear on conclusions derivable from earlier toxicology studies, these studies have in some instances been ...
R. Junghans
exaly   +4 more sources

Binding of methylmercury compounds by humic and fulvic acids

Water, Air, and Soil Pollution, 1995
Humic and fulvic acids were isolated from Fawn Lake in Ontario and investigated by membrane dialysis for their ability to bind CH3Hg+. By measuring the distribution of methylmercury compounds in and outside of the dialysis membrane, for the first time, binding capacities and conditional stability constants for CH3Hg+ and humic acids could be calculated.
Holger Hintelmann
exaly   +3 more sources

Regeneration in two freshwater planarian species exposed to methylmercury compounds

Russian Journal of Developmental Biology, 2008
The regeneration rate was studied by the morphometric method in planarians Polycelis tenuis and Dugesia lugubris after different periods of exposure on food substrates with high (0.30-0.50 mg/kg wet weight) and low (0.02-0.07 mg/kg) concentration of methylmercury compounds.
I. Medvedev
exaly   +4 more sources

Biosynthesis of Methylmercury Compounds by the Intestinal Flora of the Rat

Archives of Environmental Health: An International Journal, 1977
The contents of the rat cecum and, to a lesser extent, those of the small intestine, synthesized methylmercury from mercuric chloride labeled with Hg 203 in vitro under aerobic or anaerobic conditions. The rate of formation was approximately 18 ng/g cecal contents/20 hr.
I, Rowland, M, Davies, P, Grasso
openaire   +3 more sources

Interaction of methylmercury compounds with albumin

Archives of Toxicology, 1990
The nature of interaction between bovine serum albumin (BSA) and methylmercurial compounds has been investigated by ultrafiltration analysis. Four types of BSA samples, mercaptalbumin, its mixed disulfides with glutathione (GSH) and L-cysteine (CySH), and S-carbamidomethylated derivative, were used for binding assays with methylmercury (MM) chloride ...
A, Yasutake, K, Hirayama, M, Inoue
openaire   +3 more sources

Simultaneous determination of inorganic mercury and methylmercury compounds in natural waters

Analytical and Bioanalytical Chemistry, 2002
The purpose of the present work was to develop a simple, rapid, sensitive and accurate method for the simultaneous determination of inorganic mercury (Hg(2+)) and monomethylmercury compounds (MeHg) in natural water samples at the pg L(-1) level. The method is based on the simultaneous extraction of MeHg and Hg(2+)dithizonates into an organic solvent ...
Martina, Logar, Milena, Horvat, Hirokatsu, Akagi, Boris, Pihlar   +3 more
openaire   +3 more sources

Molecular activation analysis for methylmercury compounds

Journal of the Chemical Society, Chemical Communications, 1974
The use of neutron activation analysis for the selective determination of mercury in various mercury compounds is described as well as the application of this technique to the determination of methylmercury in fish tissue.
I. G. deJong, T. Omori, D. R. Wiles
openaire   +2 more sources

Mercury-proton spin-spin coupling constants of some methylmercury compounds

Journal of Organometallic Chemistry, 1973
Abstract The 199 Hg 1 H spin-spin coupling constants for methylmercury salts of 36 organic acids, CH 3 HgX (where X = OR − , SR − or OOCR − , were determined. A linear relationship between the coupling constants and the p K 's of the monobasic parent acids was found. The magnitudes of the coupling constants are dependent on the type of basic site,
Louis F. Sytsma, Robert J. Kline
openaire   +2 more sources

Critical review of analytical methods for determination of inorganic mercury and methylmercury compounds

Applied Organometallic Chemistry, 1994
AbstractThis review describes determinations of mercury compounds under three categories: total mercury; separate determinations of inorganic mercury(II) and organomercury compounds by selective reduction; and speciation of inorganic mercury(II), monomethylmercury cation, and dimethylmercury. Topics described for each category include sample treatment,
Richard Puk, James H. Weber
openaire   +2 more sources