Results 171 to 180 of about 1,973 (217)

Electrochemical reduction of metamitron

Journal of Electroanalytical Chemistry, 1998
Metamitron (I) (4-amino-3-methyl-6-phenyl-1,2,4-triazin-5(4H)-one) is a herbicide which is reduced electrochemically in two 2-e− steps. Reduction in the first step involves the protonated form of the 1,6-azomethine bond, while the second step involves the protonated form of the 2,3-azomethine bond. The 1,6-bond is reduced at potentials ca.
Frantisek Liska
exaly   +2 more sources

Novel electrochemical procedure for the determination of metamitron

International Journal of Environmental Analytical Chemistry, 2018
ABSTRACTIn this paper, a chronopotentiometric method for the determination of herbicide metamitron (MTM) using a glassy carbon electrode (GCE) and a thin film mercury electrode (TFME) as working electrodes is presented. MTM provided a well-defined reductive peak in the Britton–Robinson buffer on both working electrodes.
Ana D Đurović, Dušan Rakić, Nada L Grahovac   +2 more
exaly   +3 more sources

Adsorption of 1,2,4-triazine pesticides metamitron and metribuzin on lignin

Microchemical Journal, 2000
The 1,2,4-triazine pesticides, metamitron [4-amino-3-methyl-6-phenyl-1,2,4-triazin-5(4H)-one] and metribuzin [4-amino-3-methylthio-6-tert-butyl-1,2,4-triazin-5(4H)-one] are adsorbed on lignin. The adsorption can be followed by measuring polarographically the concentration of the free pesticide in a slurry, obtained by dispersing rot-wood lignin in an ...
Jiřı́ Ludvı́k, Petr Zuman
exaly   +2 more sources

Transformation of metamitron in water-sediment systems: Detailed insight into the biodegradation processes

Science of the Total Environment, 2017
Metamitron and its main metabolite desamino-metamitron are frequently detected in surface waters. To date, there are no studies targeting metamitron degradation in water-sediment systems. Therefore, the aim of this study was to trace the fate of metamitron in a water-sediment system using 13C-isotope labeling.
Shizong Wang, Anja Miltner, Matthias Kästner   +2 more
exaly   +3 more sources

Oxygen dependence in the photoreaction of the pesticide metamitron

Journal of Photochemistry and Photobiology A: Chemistry, 2017
Abstract The dependence of the quantum yield of metamitron on oxygen concentration in the range c O 2  = (0.005–12.6)· 10 −4  M in aqueous solution was investigated with a polychromatic Xe-light source in the wavelength region 270–376 nm. The quantum yield of Φ = 0.022 ± 0.002 mol mol −1 at T  = (293 ± 3) K and c O 2 = 2.8
exaly   +2 more sources

Photochemical reactions of metamitron

Chemosphere, 1997
Abstract Photochemical reactions of metamitron (a 4-amino substituted as-triazin-5(4H)-one) were investigated including UV- and phosphorescence spectroscopy, determination of quantum yields, comparison with measurements in sunlight and products found.
W.-U. Palm, M. Millet, C. Zetzsch
openaire   +1 more source

Polarographic study of the herbicide metamitron

Electroanalysis, 1994
AbstractThe electrochemical characteristics of the herbicide metamitron have been studied in the pH range 1 to 9 by applying several polarographic techniques, namely DCP, TAST, and DPP, adsorptive stripping voltammetry, and cyclic voltammetry with HMDE.
Carlos Olmedo, Luis Deban, Dolores Vázquez, Rafael Pardo, Susana Palmero   +4 more
openaire   +1 more source

Toxicokinetics, Recovery, and Metabolism of Metamitron in Goat

Journal of Agricultural and Food Chemistry, 2003
Toxicokinetic behavior and metabolism studies of metamitron and its effect on the cytochrome P(450) content of liver microsomal pellet were carried out in black Bengal goats after a single oral administration at 278 mg kg(-1) and consecutive oral administration of 30 mg kg(-1) for 7 days.
Shiben C, Debnath, Arindam, Kundu, Shyamal K, Das, Tapan K, Mandal, Anjan, Bhattacharyya, Ashim, Choudhury, Animesh K, Chakraborty   +6 more
openaire   +2 more sources

Metamitron activity in tolerant and susceptible plants

Pesticide Science, 1977
AbstractThe herbicidal activity of metamitron, its inhibition of photosynthesis and its metabolism were studied in a number of plant species. An enzymic, light‐independent deamination produces an inactive metabolite. Metabolism is rapid in plants tolerant to metamitron, e.g.
Robert R. Schmidt, Carl Fedtke
openaire   +1 more source

Persistence of metamitron in a sandy loam soil

Bulletin of Environmental Contamination and Toxicology, 1976
Metamitron seems most likely to be applied at drilling or shortly afterwards. The results show that even under abnormally dry conditions, no more than 20% of the initial activity remained in the top 7 cm of soil at the time red beet were harvested. Some activity was detectable at a depth of 7.5–10 cm, but more than half of that still present was in the
W. Bond, H. A. Roberts
openaire   +1 more source