Abd-Alrahman S.H.,King Saud University |
Abd-Alrahman S.H.,Central Agricultural Pesticides Laboratory |
Kotb G.A.M.,Agricultural Research Center |
Elhalwagy M.E.A.,King Abdulaziz University |
And 4 more authors.
Journal of Animal and Veterinary Advances | Year: 2013
Fenitrothion is being increasingly used as an insecticide under intensive cultivation to control vegetables and fruits pests. The bioconcentration of fenitrothion 2 different groups of freshwater fish (Oreochromis niloticus) was investigated after 28 days of exposure. One tenth of the determined 96 h-LC50 concentrations applied to fish. Fenitrothion concentration was 3.85 mg kg-1 and the Bioconcentration Factors (BCFs) after the experimental period 28 days 675.43 for whole fish body while the concentration was 1.51 mg kg-1 with respective BCFs was reached 264.91 for muscle tissue were 1.61 after daily exposure during the experimental time 28 days. Results concluded that the fenitrothion has ability to fenitrothion bioconcentration factor was high in whole fish compared to muscle tissue. © Medwell Journals, 2013.
Abdel-Halim K.Y.,Central Agricultural Pesticides Laboratory |
Abdel-Raouf M.,Menoufia University |
Abdou G.Y.,National Research Center of Egypt
International Journal of ChemTech Research | Year: 2016
The role of aqueous ozonation among stimulation of the potential toxic effects of herbicide; thiobencarb on mosquito fish Gambusia affinis was examined after 96 hrs exposure. Two levels (1/5 and 1/10LC50) of herbicide were used individuals or mixed with either 1 or 5 ppm of ozone (O3). The aqueous ozonation of thiobencarb stimulated acetylcholinestrase (AChE) activity to reach the highest value (0.186 μmole.mg-1.min-1) in case of [1/5LC50 thiobencarb+O3 (5 ppm)] treatment. All treatments induced increase of malondialdehyde (MDA) levels compared with untreated group which not exceeded than 1.52 mM.g-1 tissue. Catalase (CAT) and glutathione peroxidase (GPx) showed variability in their response to ozonation process, especially GPx which subjected to values lowest than those of untreated group. On the other hand, lactic dehydrogenase (LDH) activity increased in most treatments, where 1/10LC50 thiobencarb recorded the highest value (512.7 U. L-1). The lowest one was recorded for [1/10LC50 thiobencarb+O3 (1 ppm)] treatment to be 129.5 U. L-1. This fact represents the cytotoxic effect of examined herbicide under ozonation condition. The all data revealed that, ozonation process for pesticide removal must be done under especial conditions and usage of catalytic agents to decline their potential toxic effects on organisms. © 2016, Sphinx Knowledge House. All Rights Reserved.
ElShafei G.M.S.,Ain Shams University |
El-Said M.M.,Central Agricultural Pesticides Laboratory |
Attia H.A.E.,Central Agricultural Pesticides Laboratory |
Mohammed T.G.M.,Central Agricultural Pesticides Laboratory
Industrial Crops and Products | Year: 2010
In this study, we have used the essential oils Eucalyptus (E), Linalool (L) and Marjoram (M) to prepare several formulations of w/o/w double emulsion type. Span 80 and Tween 80 were the lipophilic and hydrophilic emulsifiers, respectively, with xanthan gum as thickener. Successful formulations showed stability at room temperature and 4 °C for 30 days. These formulations showed also water-dilution tolerance, and retained more than 70% of electrolyte included in the internal aqueous phase. Pesticide activity of the used oils against four fungi has been remarkably increased, based on the value of EC50, upon using in the form of w/o/w double emulsion. We have recorded up to 70% loss in required EC50 in most cases. The absence of organic solvents, unlike many common pesticide formulations, the aqueous pool embracing the environmentally safe oils and the property of controlled electrolyte release make such formulations attractive to be the subject of further more detailed studies. © 2009 Elsevier B.V. All rights reserved.
Sadeek S.A.,Zagazig University |
El-Attar M.S.,Zagazig University |
El-Lattif N.S.A.,Central Agricultural Pesticides Laboratory
Bulletin of the Chemical Society of Ethiopia | Year: 2014
Some new solid complexes [CrCl3(L)3]×6H 23O, [FeCl3(L)3]×6H2O and [Cu(CH 3COO)2(L)3]×2H2O have been synthesized quantitatively by the interactions of 2-methyl-quinazolinone (L) with CrCl3.6H23O, FeCl3.6H2O and Cu(CH3COO)2. 2H2O in a mixture of an ethanol-bidistilled water (1:1), at 60 °C. They were characterized by melting point, molar conductivity, magnetic moment, elemental analysis, infrared spectra and thermal analyses. The results supported the formation of the complexes and indicated that the ligand reacted as a monodentate ligand bound to the metal ion through the oxygen atom. The antifungal activity of the free ligand and their metal complexes were evaluated against several species, such as Fusarium solani, Rizoctonia solani, Sclortium rolfsii and Botryodiplodia and they showed a good antifungal activity to some selected fungal strain as compared with free ligand. © 2014 Chemical Society of Ethiopia.
Megahed A.M.,Zagazig University |
Dahshan H.,Zagazig University |
Abd-El-Kader M.A.,Zagazig University |
Abd-Elall A.M.M.,Zagazig University |
And 3 more authors.
Scientific World Journal | Year: 2015
Ten polychlorinated biphenyl (PCB) congeners were determined in water samples collected along the River Nile using gas chromatography-electron capture detector (GC-ECD). PCB concentrations ranged from 14 to 20 g/L, which were higher than those reported in previous studies, indicating serious PCB pollution in the River Nile. PCB congener profiles varied depending on the sampling sties. PCB-138 was the predominant congener accounting for more than 18% of total PCBs. The composition of PCB congeners in the water revealed that highly chlorinated PCB technical mixtures such as Aroclor 1254 was the main PCB production historically used in Egypt. An increasing trend in PCB levels from the upper stream to the Nile estuaries was observed. The calculated flux of PCBs indicated that 6.8 tons of PCBs is dumped into the Mediterranean Sea each year from the River Nile. The hazard quotients and carcinogenic risk caused by PCB pollution in the River Nile were above the acceptable level indicating that PCBs in the River Nile water pose adverse health effects for all age groups. Our findings revealed that PCBs possess a serious risk to the Egyptian population that depends mainly on the River Nile as a source of water. Thus, stricter legislation and regulatory controls should be applied to reduce the risk of PCBs in Egypt. © 2015 Ayman Mohamed Megahed et al.
PubMed | Central Agricultural Pesticides Laboratory and Zagazig University
Type: | Journal: TheScientificWorldJournal | Year: 2016
Ten polychlorinated biphenyl (PCB) congeners were determined in water samples collected along the River Nile using gas chromatography-electron capture detector (GC-ECD). PCB concentrations ranged from 14 to 20 g/L, which were higher than those reported in previous studies, indicating serious PCB pollution in the River Nile. PCB congener profiles varied depending on the sampling sties. PCB-138 was the predominant congener accounting for more than 18% of total PCBs. The composition of PCB congeners in the water revealed that highly chlorinated PCB technical mixtures such as Aroclor 1254 was the main PCB production historically used in Egypt. An increasing trend in PCB levels from the upper stream to the Nile estuaries was observed. The calculated flux of PCBs indicated that 6.8 tons of PCBs is dumped into the Mediterranean Sea each year from the River Nile. The hazard quotients and carcinogenic risk caused by PCB pollution in the River Nile were above the acceptable level indicating that PCBs in the River Nile water pose adverse health effects for all age groups. Our findings revealed that PCBs possess a serious risk to the Egyptian population that depends mainly on the River Nile as a source of water. Thus, stricter legislation and regulatory controls should be applied to reduce the risk of PCBs in Egypt.
Hussein I.H.,Fayoum University |
Hashim E.F.,Fayoum University |
Toson M.G.,Central Agricultural Pesticides Laboratory |
Gnedy M.M.,Central Agricultural Pesticides Laboratory
Egyptian Journal of Biological Pest Control | Year: 2010
All tested plant oils (cottonseed, linseed, castor, clove, onion, citronella, lemongrass and chamomile) were miscible with xylene. Addition polyethyleneglycol (9%) as emulsifier and xylene (11%) as co-solvent to 80% of crude plant oils was used in formulation process as emulsifiable concentrates. Also, all locally formulated plant oils were passed successfully in all physiochemicals parameters i.e. emulsion stability, cold test, free acidity and alkalinity tests. All tests were carried out according to the international specifications by CIPAC, WHO and FAO. Obtained results indicated that reducing the surface tension and pH value with increasing electrical conductivity led to enhancement in wetting, spreading and retention of plant oils used as spray solutions on the treated plants, therefore their toxicity was increased. Toxicity of plant oils and their mixtures, clove oil exhibited the most toxic action while lemongrass oil was the least toxic against Aphis craccivora (Koch.) and Aphis gossypii (Glov.). The oil mixtures of (castor + clove), (linseed + onion) and (cottonseed + chamomile) were the most potent against both aphid species, whereas lemongrass mixed with castor or cottonseed were the least effective.
Abdel-Halim K.Y.,Central Agricultural Pesticides Laboratory |
Abo El-Saad A.M.,Alexandria University |
Talha M.M.,Central Agricultural Pesticides Laboratory |
Hussein A.A.,Central Agricultural Pesticides Laboratory |
Bakry N.M.,Alexandria University
Chemosphere | Year: 2013
The oxidative stress in the digestive gland of the land snail Helix aspersa was considered as a bioindicator for atmospheric pollution with heavy metals from several industries and vehicular traffic in Kafr El-Zayat city. Regional means of heavy metals concentration of all sites were 0.71, 7.09, 0.71, 2.68, 41.44 and 18.01mgkg-1 wet mass for Cd, Mn, Ni, Pb, Zn and Cu, respectively. In addition, the highest values of Cd concentrations were found 1.22 and 1.73mgkg-1 wet mass in S1 (Potato International Center) and S4 (The Nile bank), respectively. Lactate dehydrogenase (D-LDH(and recorded lipid peroxidation (LPO) levels were significantly high in S1 and S2 (Traffic station). On the other hand, the highest activity of catalase (CAT) was found in S2 (194.04% of control), while the activity of glutathione peroxidase (GPx) reached the highest significant value in S1.As a matter of fact, glutathione-S-transferase (GST) and glutathione reductase (GR) activities were significantly higher in polluted sites than in reference zone. In contrast, the glutathione (GSH) concentration of exposed animals showed significant decrease in all sites, with the lowest value in S1 (57.61% of control). However, metallothioneins concentration (MT) showed no significant difference in all sites except in S1 which accounted for 127.81% of control. Therefore, the overall results of this study showed the importance of H. aspersa as a sentinel organism for biomonitoring the biologic impact of atmospheric pollution in urban areas. © 2013 .