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Oxons properties

The reactions show some typical oxidations of insecticides catalyzed by CYP enzymes. Carbofuran is hydroxylated to another active compound carbaryl is demethylated or hydroxylated and aldrin is epoxidated to diel-drin, which also has insecticidal properties. Phosphorothionates must be oxidized to the phosphates by CYP enzymes in order to become inhibitors of acetyl cholinesterase. Parathion-methyl is transformed to the oxon analogue, paraoxon-methyl, which is the toxic compound. It also can be demethylated to the inactive desmethyl-parathion-methyl. [Pg.184]

Since these products are often manually handled during, for instance, swimming pool cleaning and maintenance, they must be converted into shapes with properties that avoid nuisance dust and enhance stability. The pure chemicals, which, as produced, may be very fine (e.g., sometimes precipitated), are often mixed with other components for specific performance. For example, Oxone can be blended with many additives, including sodium-sulfate, -carbonate (especially the dense version), -bicarbonate, -perborate, -tripolyphosphate, -metasUicate, tetrasodium pyrophosphate, citric-, malic-, and tartaric-acids and surfactants and fragrances. To maintain stability, all ingredients must be anhydrous or hold hydrated water tightly. [Pg.1407]

Acute intoxication by anti-ChE agents causes muscarinic and nicotinic signs and symptoms, and, except for compounds of extremely low lipid solubility, affects the CNS. Systemic effects appear within minutes after inhalation of vapors or aerosols. The onset of symptoms is delayed after GI and percutaneous absorption. Duration of effects is determined largely by the properties of the compound lipid solubility, whether it must be activated to the oxon, stability of the organophos-phorus-AChE bond, and whether aging of phosphorylated enzyme has occurred. [Pg.130]

D. Evans et al., Properties of glass reinforced composites at low temperatures. Report No. RPP/Ell, Rutherford Laboratory, Chilton, Oxon, England (1968). [Pg.376]

There is evidence that organophosphates may play a role in disrupting glial cell growth. It has been demonstrated that chlorpyrifos, chlorpyrifos-oxon and diazinon inhibit DNA synthesis in nerve cells, in vitro (18). Tlie effects were more pronounced in glial cells (C6) than in neuronal cells (Cl2). The disruption of DNA synthesis could, in turn, result in altered glial cell structure, with consequent changes in the properties of the blood-brain-barrier. However,... [Pg.152]

Unlike the Sharpless epoxidation, which gives ehiral epoxides fix)m allylic alcohols, asymmetric epoxidation of unfimctionalized alkenes achieved by Jacobsen et al. [74],by using chiral salen-metal catalysts. Salen-Mn catalysts are preferred since manganese itself is relatively a low eost and nontoxic metal, primarily because of fewer side reaetions over other metal eomplexes. Variety of simple oxidants, such as PhlO, NaClO, and oxone are employed as reoxidants and best possible enantioselectivity for a given substrate could be achieved by choosing the proper metal-salen catalyst and reaction conditions [81], The catalyst can be Irne-tuned for required steric and electronic properties by making a variety of chiral salen ligands fi om various chiral diamines with salicylaldehyde derivates [82]. [Pg.359]


See other pages where Oxons properties is mentioned: [Pg.106]    [Pg.542]    [Pg.625]    [Pg.961]    [Pg.802]    [Pg.221]    [Pg.195]    [Pg.478]    [Pg.89]    [Pg.601]    [Pg.339]    [Pg.665]    [Pg.480]    [Pg.887]    [Pg.356]    [Pg.363]    [Pg.165]    [Pg.289]    [Pg.52]   
See also in sourсe #XX -- [ Pg.196 ]




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Oxonation

Oxone

Oxons

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