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Biochemical studies on some pesticide residues
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Abstract: 1872 sample vegetables and fruits (i.e. 104 samples of each commodity) collected from great Cairo markets (Cairo, Giza, and Kalubia) from February 2001 to February 2003. Vegetables subjected to residue analysis were green dill, green coriander, green parsley, tomatoes, cucumber, Molokai, green beans, green peas, lettuce, spinach, pepper, water cress and carrot. Fruits subjected to residue analysis were orange, guava, peach, strawberries and grape. Studied vegetables and fruits were contaminated with profenofos, dimethoat, chloropyrifos, chloropyrifos- methyl, malathion, cypermethrin, diazinon, metalaxyl, bromopropylate, carbaryl, chlorothalonil, dichlofluanid, dicofol, fenitrothion, imazalil, iprodioneomethoate, phenthoate, profenofos- methyl, triazofos.
40 samples of Freezed vegetables were analyzed. Freezed Molokai contained chlorpyrifos, chlorpyrifos- methyl, dimethoat and profenifos residues. A few numbers of .Ispinach samples (one samples for each pesticide' were contaminated with chloropyrifos (0.17ppm) and malathion (0.05ppm) no violation was found in spinach samples. Only one "green beans sample was contaminated with dimethoat (0.03 ppm) with no violation. Green peas samples were completely clean from any traces of pesticide residues. Manufactured juice samples (40 samples) were almost clean from any pesticides residues.
The effect of washing, boiling and air drying processing on spiked green dill, green coriander and green parsley samples with chloropyrifos- methyl, chloropyrifos and profenofos were studied. The three household processes caused reduction of chloropyrifos- methyl, chloropyrifos and profenofos residues in green dill green, coriander and green parsley. Boiling for 5 minutes is more effective to decrease the amount of chloropyrifos- methyl, chloropyrifos and profenofos residues in the three plants when compared to air- drying and washing.
The body weight of treated rats was decreased as the result of combined pesticides treatment (profenofos, chloropyrifos and chloropyrifos- methyl). The tr~atment with different concentrations caused a significant decrease in the mean of glucose after 14 days from the treatment (in comparison with control) while, glucose increased significantly after 28 days from the treatment. After 14 days from the treatment the cholesterol level decreased significantly. Whereas, The same trend happened after 28 days. The means of triglycrides content is significantly increased in rats (this results after 14 days from the treatment). Meanwhile, the treatments after 28 days induced a significant decrease in triglycrides level. A significant increase in the means of aspartate amino transferase (AST) throughout the experimental periods (14 and 28 days) was observed these results are in comparison with control. Also a significant increase (almost near to control after 14 days) in means of alanine amino transferase (ALT) throughout the experiment was noticed. Either a significant reduction in alkaline phosphatase (ALP) activity throughout the experimental period. All concentrations of the three pesticides combination did not alter the total protein and albumin concentrations in comparison with the control (through 28 days). A significant increase of the means of urea and uric acid concentrations throughout the experimental period in male albino rats was observed. Non-significant decrease in creatinine levels were noticed through 14 days
." from the beginning of the experiment except the treatment of 0.36 and 1.92 ppm while there . was a significant decrease in all concentrations after 28 days. A significant decrease in the means of AChE activity (more than 50% inhibition) after 14 days from the treatment (in comparison with control) was shown. After 28 days from the treatment the activity of AChE increased significantly this result may be due to the tolerance of pesticides (it did not reach to control).
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| Publication year |
2004
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| Availability location |
Central Laboratory of Residue Analysis of Pesticides & Heavy Metals in Foods--7 شارع نادى الصيد - الدقى - الجيزة
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| Availability number |
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| Organization Name |
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| Country |
Egypt
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| Department |
Pesticides Residue Analysis
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| Author(s) from ARC |
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| Agris Categories |
Physiology of human nutritionPollution
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AGROVOC
TERMS |
Chemotaxonomy.
Contamination.
Fruits.
Herbaceous plants.
Pesticides.
Residues.
Vegetables.
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| Publication Type |
PhD Thesis
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