Multiequilibria of 2-(2'-furanyl)-1H-bezimidazole neutral and protonated forms in the presence of amphiphilic aggregates

Article Abstract:

The acidity function in the solubility measurement of 2-(2'-furanyl)-1H - benzimidazole (fuberidazole) in water surfactant systems is discussed. Fluoresence anisotropy method was used in determining the partition constants between water and micellar pseudophase of both neutral and protonated forms of fuberidazole. Obtained results were compared with those from the octanol-water system. It was found that the presence of microdispersed organic matter in water strongly determines the photodegradation pattern of fuberidazole.

Methods, Analysis, Measurement, Anisotropy, Solubility, Fungicides

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Consequences of the partition between water and molecular aggregates on the photodegradation pattern and kinetics of a pesticide of the coumarin family

Article Abstract:

The kinetics of the photodegradation of the pesticide coumaphos in the presence of sodium dodecyl sulfate (SDS) micelles was examined. Results revealed no difference between the properties of the photodegradation products in air-equilibrated aqueous media and when SDS is added. Specifically, both media yielded two isomer dimers and a product produced by the opening of the coumarinic ring. However, yields were determined by pesticide and surfactant concentration.

Research, Evaluation, Biodegradation, Micelles

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Partition of pesticides of the coumarin family between water and amphiphilic aggregates

Article Abstract:

The partition constants of 0, 0-diethyl-0-(4-methylcoumarin-7-yl)thiophosphate and 0, 0-diethyl-0-(3-chloro-4-methylcoumarin-7-yl)thiophosphate between water and both phospholipid bilayers and micelles were investigated using fluorescence anisotropy. The results showed that there is no correlation between water partition and the hydrophobicity. However, further research is needed to quantify the amphiphilic character.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Coumarin, Environmental aspects, Water, Water quality

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