Spektrophotometrische Bestimmung von Dimethylamin in Dimethylformamid

Přibyl, M.; Nedbálková, J.

doi:10.1007/bf00532277

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…The absorbed CS2 was determined colorimetrically (11). DMA remaining in the reaction mixture was extracted three times with ether and measured colorimetrically by the procedure of Pribyl and Nedbalkova (13). Residual thiram was extracted three times from the reaction mixture with chloroform, and the thiram content of the extract was determined colorimetrically (7).…”

Section: Methodsmentioning

confidence: 99%

Resistance of Rhizobium strains to phygon, spergon, and thiram

Odeyemi¹,

Alexander²

1977

Appl Environ Microbiol

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Strains of Rhizobium meliloti, Rhizobium sp. nodulating cowpeas, and R. phaseoli derived from cultures susceptible to tetramethylthiuram disulfide (thiram), 2,3-dichloro-1,4-naphthoquinone (phygon), and 2,3,5,6-tetrachloro-pbenzoquinone (spergon), respectively, grew in the presence of high concentrations of the fungicides and converted them to products not toxic to the sensitive rhizobia. The results of chemical assays demonstrated that the pesticides were destroyed by the resistant bacteria but not by the susceptible parent rhizobia. Resting cells of thiram-metabolizing R. meliloti formed large quantities of dimethyldithiocarbamate, dimethylamine, and CS2 from the pesticide. The products were characterized by gas and thin-layer chromatography, colorimetric reactions, and ultraviolet spectrometry. Dimethylamine and CS2 were formed spontaneously from dimethyldithiocarbamate, but the yield was higher in the presence ofR. meliloti. The phygon-resistant bacterium converted the fungicide to five metabolites and thereby rendered the chemical nontoxic to a test fungus. The resistant strain of R. phaseoli generated at least one organic product and released about one-third of the chlorine during its detoxication of spergon.

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Section: Methodsmentioning

confidence: 99%

Resistance of Rhizobium strains to phygon, spergon, and thiram

Odeyemi¹,

Alexander²

1977

Appl Environ Microbiol

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“…The DMA concentration in the steam distillates was determined by the colorimetric method of Pribyl and Nedbalkova (9). The identity of the amine was verified by gas-liquid chromatography (14) or by thin-layer chromatography.…”

Section: Methodsmentioning

confidence: 99%

Microbial formation and degradation of dimethylamine

Tate¹,

Alexander²

1976

Appl Environ Microbiol

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Dimethylamine was formed from trimethylamine in soils of different pH values. The rate of disappearance of the secondary amine from soil was affected by pH and was markedly reduced under anaerobiosis. The accumulation of dimethylamine in cultures of Micrococcus sp. provided with trimethylamine depended on the nitrogen sources available to the bacterium but was not greatly influenced by the C-N ratio of the medium. Dimethylamine and nitrite accumulated in large amounts at pH 6.0 to 8.0 in cultures containing the tertiary amine and nitrate, but dimethylnitrosamine was apparently not produced.

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“…Tyramine concentration in bile, urine, and feces samples was determined spectrophotometrically according to the method of Pribyl and Nedbalkova (1967). As a control, ordinary rat bile was spiked with pure tyramine and treated in the same manner as the test bile, and the concentration of tyramine was determined spectrophotometrically.…”

Section: Chemicalsmentioning

confidence: 99%

Elimination of Tyramine in Protein Energy-Deficient Wistar Rats

Uhegbu¹

1996

J. Agric. Food Chem.

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The in vivo biliary elimination of the dietary amine tyramine was studied in protein energy-deficient rats. Tyramine was administered intraperitoneally at single doses of 1200 μg/kg body weight to Kwashiorkor Wistar rats following cannulation of the bile duct. Excretory products in 24-h samples of feces and urine from both Kwashiorkor and normal cannulated rats, who were similarly dosed with tyramine, were also examined. The feces and urine samples were subjected to spectrophotometric and paper chromatographic analyses that showed the presence of tyramine, p-hydroxyphenylethanol, p-hydroxyphenylacetic acid, p-hydroxyphenaceturic acid, and N-acetyltyramine. Thin-layer chromatography of the bile from test rats followed by ultraviolet analysis of the chromatogram confirmed the presence of unchanged tyramine and the metabolite p-hydroxyphenylethanol. The results confirm that the bile is an excretory route for the amines and also that nutrition plays an important role in the pharmacological or toxic action of ingested foreign chemicals or compounds. Keywords: Tyramine; drug metabolism; protein-energy deficiency; bile duct; liver

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Spektrophotometrische Bestimmung von Dimethylamin in Dimethylformamid

Cited by 6 publications

References 4 publications

Resistance of Rhizobium strains to phygon, spergon, and thiram

Resistance of Rhizobium strains to phygon, spergon, and thiram

Microbial formation and degradation of dimethylamine

Elimination of Tyramine in Protein Energy-Deficient Wistar Rats

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