خيارات البحث
النتائج 1 - 10 من 13
[Effect of chemical structure on the efficiency of certain insecticides against Apis fabae]. [Arabic]
1993
El Zemaity M.S. | Hussein M.I. | Salama S.B. | Leauassi F.
[Effect of certain pesticides on some biochemical aspects of rabbit, Lepus cuniculus]. [Arabic]
1993
El Zemaity M.S. | El Marzoky A. | Abd El Nor S. | Alawa S. | Kaisome S.
Toxicity of pesticide treated Tetranychid nymphs on certain biological aspects of the predaceous mite, Amblyseius swirskii.
1996
Kilany S.M. | Hussein E.M.K. | Rasmy A.H. | Abo Elella G.M.A.
MOLLUSCICIDAL EFFICACY AND TOXICITY OF SOME PESTICIDES UNDER LABORATORY AND FIELD CONDITIONS
2006
Abdel-Halim K.Y. | A.A. Hussein | R.K. Abou-El Khear
Laboratory and field trials were carried out at Koom Hamada district and Etay El-baroud research station during 2004/ 2005 season to clarify the molluscicidal ac-tivities of the following: indoxacarb, lufenuron, Bacillus thurringiensis, kurestaci (Bt.) and methomyl against glassy clover snails Monacha cartusiana (Müler). Re-sults indicated that all tested pesticides decreased snails population compared with control. Under the field conditions, the efficiency of the tested compounds were 98.0, 93.4, 93 and 71.58% for methomyl, lufenuron, indoxacarb and Bt. after 5, 6, 13, and 28 days of treatment, respectively. Moreover the effect of LC50 and 0.5 LC50 of these compounds were investigated on some biochemical parameters in vivo. The activities of acetylcholinestrase (AChE), alanine aminotransferases (ALT) , as-partate aminotransferases (AST) and protein contents at different time intervals were evaluated. The specific activity of AChE reached 0.009, 0.002, 0.006 and 0.001 mole/ mg protein/ min for indoxacarb, lufenuron, Bt. and methomyl, respectively, after one day of treatment with (LC50 for each compound). In general, Bt. and in-doxacarb caused slight inhibition on AChE enzyme. All treatments decreased ALT and AST enzyme activity in the tested animals. However, Bt. Showed slight effect on the activity of aminotransferases enzymes.
اظهر المزيد [+] اقل [-]GENETIC EFFECT OF MIGRATORY COMPOUNDS FROM BOTTLED NATURAL DRINKING WATER STORED UNDER DIRECT SUNLIGHT
2018
H.M., Fahim | Neima, K. Alsonosy | M.F. Khallaf | Y.A. Abdeldaim | Hemat E. Elsheshetawy
The drinking water is one of the important routes for human exposure to contaminants through releasing of antimony (Sb) and polymers from polyethylene terephthalate (PET) plastic. The aim of this study was to investigate the effect of sunlight on chemical compounds migration into PET-bottled water and studying the cytotoxicity of di-butyl phthalate (DBP) and di-octyl phthalate (DOP) by SMART in Drosophila melanogaster. Four random water bottle samples produced by various companies as: A (PET, clear, 0.6L), B (PET, clear, 1.5L), C (PET, blue, 1.5L) and D (polycarbonate PC, blue, 19L) for studying the effect of direct sunlight exposure on migration of antimony and phthalates. Experiment was carried out in the presence of sunlight (7 h daily) for 210 day. The migrated compounds profile (µg/L) that detected sample (A) before storage were only two compounds formaldehyde (FA) and acetaldehyde (AA) out of nine compounds. During storage under sunlight, four compounds (Sb), bis-phenol A (BPA), dimethyl phthalate (DMP) and diethyl phthalate (DEP) were increased till 30th day then did not affect till the end of storage. Other detected compounds were continuously progressed till the end of storage with different rates. The highest rate was appeared in case of FA, it was 222 fold followed by DOP compound (173 fold) as well as DBP (75.3 fold) and finally the AA compound with 17.9 fold. Regarding to another sample B, only 3 compounds (BPA, DMP and DBP) were not detected at zero time. The AA compound was detected with the highest concentration (0.9µg/L) and the lowest one was DOP (0.007µg/L). Only four compounds were detected before storage named Sb, DOP, FA and AA, the lowest level (0.006µg/L) was noticed in DOP, while the moderate level was recorded in FA (0.03µg/L) and Sb (0.08µg/L). Other detected compounds; i.e. DBP, DOP, AA and FA were consequently increased with higher levels. This study investigated genotoxic effects of (DBP) and (DOP) at 30µg/ml concentration using the somatic mutation and recombination test (SMART). The cytotoxicity of the tested phthalate compounds was also assessed at five different concentrations 0.5, 1, 5, 10 and 20µg/ml in two types of human cell lines; liver cancer (HepG2), colon cancer (HCT-116) using neutral red cytotoxicity assay. All of tested compounds significantly showed high levels of tumor induction and frequency compared to the negative control in SMART assay. It was also reduced the viability of the HepG2 cell lines cells using different concentrations and the highest cytotoxic effect. While, on HCT-116 showed no cytotoxic effect.
اظهر المزيد [+] اقل [-]SUBCHRONIC TOXICITY OF MANCOZEB FUNGICIDE ON MALE WISTAR RATS: ULTRASTRUCTURAL ANALYSIS OF LIVER AND KIDNEY
2006
Madiha M. Talha | Kenawy M. | Salwa M. Abd-Allah
Dithiocarbamate mancozeb, an organometallic fungicide, was administered orally to male Wistar rats in two forms, pure technical 85% and formulated 80% WP, at sublethal doses of 125, 250 and 500 mg/kg b.w. for 28 days. Clinical chemical endpoints were measured after 2, 3, and 4 weeks of treatment initiation. Data disclosed that both compound formulations affected significantly serum enzyme activities particularly liver enzymes in a dose and time-dependent manner, compared with control. Such changes were accompanied with significant alterations in other parameters like; total protein, albumin, glucose, total lipids, triglycerides, cholestrol, urea, and creatinine. Furthermore, histological examination of liver and kidney showed several histopathogenic ubnormalities in the examined tissues of rats exposed to mancozeb either technical or formulated.
اظهر المزيد [+] اقل [-]Effect of certain technological processes in elimination of some insecticides residues from contaminated vegetables
1996
Abd-El-Daim, Y.A. | Zidan, Z.H. | Mohamed, K.A. (Ain-Shams Univ., Cairo (Egypt). Faculty of Agriculture)
Latent activity of nuclear polyhedrosis virus and two synthetic pyrethroids applied in simultaneous and sequential regimes on the control leafworm, Spodoptera littoralis in laboratory
1996
Zidan, Z.H. (Ain-Shams Univ., Cairo (Egypt). Faculty of Agriculture) | Moawad, G.M. | Soliman, S.A. | Ferron, P. | Wahba, M.E.
[Effect of certain pesticides on some biochemical aspects of rabbit, Lepus cuniculus]
1993
El-Zemaity, M.S. (Ain-Shams Univ., Cairo (Egypt). Faculty of Agriculture) | El-Marzoky, A. | Abd-El-Nor, S. | Alawa, S. | Kaisome, S.
The effect of Dithane-s 60 on nitrifying bacteria, nitrification process and Rhizobium leguminosarum in the laboratory under different soil textures
1993
Al-Jubory, M.A. (Mosul Univ. (Iraq). Faculty of Science) | Al-Barhawy, N.E.