Affiliation: | a Département des Sciences des Aliments et de Nutrition, Facultédes Sciences de l'Agriculture et de l'Alimentation, UniversitéLaval, Ste-Foy (Québec) G1K 7P4, Canada b Centre de santépublique de Québec, Centre Hospitalier Universitaire de Québec (CHUQ), 2400 D'Estimauville, Beauport (Québec) G1E 7G9, Canada c Centre de recherche en endocrinologie moléculaire, Pavillon Centre Hospitalier de l'UniversitéLaval (CHUQ), 2705 Boul. Laurier, Ste-Foy (Québec) G1V 4G2, Canada |
Abstract: | The purpose of this study was to compare the effect of the nature and quantity of various dietary fibre (cellulose, hemicellulose, pectin, lignin) in diets on the binding capacity to pesticides azinphos-methyl (AZM), chlorpropham (CLP), chlorothalonil (CKL), permethrin (PER) as estimated by solubility under conditions of pH and temperature simulating those in the gastrointestinal tract (incubated at pH 2 for 30 min at 37°C, then at pH 7 for 60 min). The ratios of fibre to pesticides were determined in omnivorous diets. In this model, the binding capacity of lignin was equal to hemicellulose for PER, AZM and CLP, but it was significantly higher for CKL. Hemicellulose bound more CKL, AZM and CLP than did cellulose. Although pectin appreciably decreased all pesticides, its effect was lower than other fibres with one exception—cellulose-CKL. In the presence of equal amounts of fibre, lignin exerted the most significant effect on pesticide solubility. Hemicellulose and cellulose bind to the same extent PER and AZM. The effect of pectin was significant only on CKL and AZM when compared to the control. |