Phosphorus-32 Pentasulfide: Preparation by Isotopic Exchange and Conversion to Thiophosphoryl-32 Chloride and Phosphorus-32 Trichloride.

Casida, John E.; Taub, William; Ginsburg, David; Hartiala, K.; Veige, S.; Diczfalusy, E.

doi:10.3891/acta.chem.scand.12-1691

Cited by 21 publications

(7 citation statements)

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“…Malathion labeled with phosphorus-32 was synthesized and purified by the method described previously (9), which utilizes an exchange reaction between labeled phosphoric acid, HsP320<¡, and phosphorus pentasulfide, P2S5 (5). The period of the final reflux was extended from 4 to 12 hours.…”

Section: Methodsmentioning

confidence: 99%

Animal Metabolism of Insecticides, Metabolism of Orally Administered Malathion by a Lactating Cow

O’Brien¹,

Dauterman²,

Niedermeier³

1961

J. Agric. Food Chem.

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Section: Methodsmentioning

confidence: 99%

Animal Metabolism of Insecticides, Metabolism of Orally Administered Malathion by a Lactating Cow

O’Brien¹,

Dauterman²,

Niedermeier³

1961

J. Agric. Food Chem.

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“…Very little is known concerning the actual identity of carbamate degradation products in plants (4). The purpose of this investigation is to identify the metabolites formed when broccoli is treated with Zectran.…”

Section: Zectranmentioning

confidence: 99%

Insect Resistance to Insecticides, Enzymatic Degradation of Parathion in Organophosphate-Susceptible and -Resistant Houseflies

Matsumura¹,

Hogendijk²

1964

J. Agric. Food Chem.

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The metabolic fate of parathion and diazinon, in one susceptible and two orgarophosphate-resistant strains of houseflies, was studied by chromatography and radioisotope techniques. The main interstrain difference resulted from the superior ability of the resistant strains to degrade parathion to diethyl phosphorothionaie. The enzyme involved in the degradation process in the strains S and Ka was purified about 30 times by acetone powder formation, DEAE-fractionation, and ethanol precipiiation. The partially purified enzyme preparations obtained from all three strains hydrolyzed parathion and diazinon to diethyl phosphorothionaie, but their activity in hydrolyzing paraoxon was relatively low. The importance of these interstrain differences in relation to organophosphate resistance is discussed.TUDIES on insecticide resistance dur-S ing the past decade have elucidated several mechanisms of resistance in many insect species ( 3 ) . Biochemical aspects of organophosphate-resistance (OP-resistance) were first studied in the housefly (Musca dome.rtica) by March ( 7 4 , who found the malathion-resistant Stauffer strain to degrade malaoxon in vitro more rapidly than the susceptible individuals. Similarly. Oppenoorth and van Asperen (27) showed the importance of biochemical degradation of paraoxon, diazinon, and malaoxon by demonstrating that, a t relatively low concentrations, the speed of disappearance of these toxic phosphates was much faster in homogenates of resistant strains than that in the susceptible strain. They employed a fly head cholinesterase bioassay technique. These authors had already shown by genetic and other means that OP-resistance was very often associated with an abnormally low level of aliesterase activity in the housefly (7). They concluded that the mutant gene which caused the lo\.z.er aliesterase level Present address: Department of Entomology, Cornel1 Cniversitv, Ithaca,

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“…Isotopic exchange (13) Solvent extraction and partition chromatography were used for purifying the radiolabeled compounds (40) until they were identical in infrared spectra (10% solutions in carbon tetrachloride or carbon bisulfide, Baird infrared spectrophotometer, sodium chloride optics) with the authentic compounds. The LD in values for flies 24 hours after injection were identical for the radiolabeled and the authentic nonlabeled compounds.…”

Section: Insecticidesmentioning

confidence: 99%

Insect Resistance to Insecticides, Biochemical Factors in the Acquired Resistance of Houseflies to Organophosphate Insecticides

Mengle¹,

Casida²

1960

J. Agric. Food Chem.

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Phosphorus-32 Pentasulfide: Preparation by Isotopic Exchange and Conversion to Thiophosphoryl-32 Chloride and Phosphorus-32 Trichloride.

Cited by 21 publications

References 0 publications

Animal Metabolism of Insecticides, Metabolism of Orally Administered Malathion by a Lactating Cow

Animal Metabolism of Insecticides, Metabolism of Orally Administered Malathion by a Lactating Cow

Insect Resistance to Insecticides, Enzymatic Degradation of Parathion in Organophosphate-Susceptible and -Resistant Houseflies

Insect Resistance to Insecticides, Biochemical Factors in the Acquired Resistance of Houseflies to Organophosphate Insecticides

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