H. AbdEl-Gawad

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1-Phenyl-3-(thiophen-2-yl)-1H-pyrazole-4-carbaldehyde was used as a synthon for the synthesis of new thiazole and pyrazoline heterocycles having 2-thienylpyrazole moiety. The antimicrobial, anti-inflammatory, and analgesic activities of the synthesized compounds were evaluated using agar diffusion method, carrageenan-induced paw edema, and writhing assays,(More)
Treatment of 2-bromoacetylbenzofuran with 1H-benzotriazole afforded 1-(benzofuran-2-yl)-2-(benzotriazol-1-yl)ethanone which reacted with phenylisothiocyanate to give the corresponding thioacetanilide derivatives. Treatment of the latter ethanone and thioacetanilide derivatives with hydrazonoyl chlorides afforded the corresponding pyrazole and(More)
This study aims to investigate the fate and histopathological effects of ethion on selected organs of the crayfish, Procamabrus clarkii. Crayfish were exposed to 1 mg l(-1) (14)C-ethion and the concentrations of ethion and its possible degradation products were measured in water and different organs of the crayfish over both the exposure and recovery(More)
Sensitive disposable potentiometric sensors for determination of the organophosphorus pesticide (OPs), ethion and its degradation residues have been constructed. The fabricated screen printed sensors are based on multi-walled carbon nanotube-polyvinyl chloride (MWNT-PVC) composite incorporated with α-cyclodextrin (α-CD) ionophore for butyrylcholine (BuCh)(More)
Organic and conventional crops were studied by identifying the relationship between persistent organic pollutants in cereals, vegetables and soil. The residues of organochlorine pesticides and polychlorinated biphenyls (PCBs) were determined in grains (rye and wheat), vegetables (carrots and beets) and soil collected from the fields. PCB residues recorded(More)
Treatment of 2-bromoacetylbenzofuran (2) with pyridine afforded its corresponding pyridinium bromide 3. The latter salt reacted with some activated alkenes and acetylenes to give the corresponding indolizine derivatives. Treatment of the salt 3 with benzylidenemalononitriles 9 afforded polysubstituted aniline derivatives, however with(More)
Ethyl 2,4-dioxo-4-(p-chloro)phenylbutyrate 2 obtained by condensation of 4-chloroacetophenone with diethyl oxalate was converted to 5-(4-chlorophenyl)-1-phenyl-1H-pyrazole-3-carbohydrazide 5 and 5-(4-chlorophenyl)isoxazole-3-carbohydrazide 6 in good yields. Treatment of 5 or 6 with phenylisothiocyanate and reaction of the resulting thiosemicarbazide 7 or 8(More)
Ethyl-1-(14)C-ethion and some of its degradation products have been prepared for comparison purposes. Cotton plants were treated with (14)C-ethion alone and in the presence of deltamethrin and dimilin pesticides under conditions simulating local agricultural practice. (14)C-Residues in seeds were determined at harvest time; about 47.5% of (14)C-activity was(More)
Currently, butter and margarine are food products attracting wide customer interest. Every day, consumers around the world buy these products for human consumption. Butter is obtained from milk fat, while margarine is derived from vegetable oils. The content of organochlorine pesticide (OCP) residues was examined in both types of these high fatty products.(More)