Shereif Mahmoud Fahmy

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A total of 835 samples of leafy vegetables and some aromatic medicinal plants were collected from five different areas of Egypt during 1999. Ninety-seven per cent of the leafy vegetables were contaminated with heavy metals with 39% exceeding the maximum limits for each element. Cadmium was detected in 78 of 116 samples of leafy vegetable, although without(More)
Organophosphorus, dithiocarbamates, and some synthetic pyrethroids pesticides, which are commonly used in Egypt for pest control, were monitored, as well as persistent organochlorines, which had been prohibited from use several years ago. Fruit and vegetable samples (397) were collected from 8 local markets and examined for 52 pesticides. Of all analyzed(More)
Pesticide residues in human milk and environmental samples from Kafr El-Zayat Governorate in Egypt were analyzed. This governorate is located near one of the biggest pesticide factories in Egypt. Organochlorine and organophosphorus pesticides were monitored, including those that have been prohibited from use in Egypt. Human milk samples (31 samples) from(More)
Cyanothioacetamide (1) undergoes self condensation to give 4,6-diamino-3-cyano-2-pyridothione (2). The latter was utilised in synthesis of pyrido[2,3-c]pyrazole, pyrido[2,3-d]pyrimidine, bis-(pyridothione derivatives) through reaction with hydrazine hydrate, ethoxycarbonyl isothiocyanate and cinnamonitrile derivatives. Also 1 undergoes self dimerisation to(More)
3-Phenylpvrazole-5-diazonium chloride (2) couples with benzoylacetonitrile and with phenacylthiocyanate to yield the corresponding hydrazone derivatives 3 a, b. Whereas 3 a cyclised into the pyrazolo[l,5-c]-as-triazine derivative (4a) upon treatment with concentrated sulphuric acid via elimination of water, treatment of 3 b with the same reagent under the(More)
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