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11.
Nasser Mohamed Megahed Tamer F. Ookawara Shinichi Hassan Hamdy 《Environmental science and pollution research international》2022,29(58):86994-87018
Environmental Science and Pollution Research - Hydrogen energy, as clean and efficient energy, is considered significant support for the construction of a sustainable society in the face of global... 相似文献
12.
The cytotoxicity of the fungicides benalaxyl, metalaxyl, and triadimefon was evaluated in vitro using the Chinese hamster ovary (CHO-K1) cell line. The midpoint cytotoxicity values of neutral red (NR) incorporation (NRI50), total cellular protein content (TCP50), and the methyl tetrazolium assay (MTT50) were estimated. Benalaxyl was the most cytotoxic fungicide, followed by metalaxyl and triadimefon. Fetal calf serum (10%) caused a reduction in benalaxyl, metalaxyl, and triadimefon cytotoxicity by factors of 1.8, 1.3, and 1.3. The effects of sublethal concentrations (NRI25) of the three fungicides on the glutathione redox cycle components glutathione S-transferase, glutathione reductase, glutathione peroxidase, and total glutathione content were studied. The ameliorative effects of extracellular glutathione (1 mmol L?1), vitamin C (70 µmol L?1), and vitamin E (30 µmol L?1) were also investigated. The three antioxidants led to significant effects on the glutathione redox cycle components. 相似文献
13.
Sunflower plants were treated with (14)C-chlorpyrifos under conditions simulating local agricultural practice. Residues present in the oil, methanol extract and cake of the treated sunflower seeds were 7.2, 2.8, and 12 ppm, respectively. When rats fed on sunflower cake containing bound residues for three days, the animals eliminated 46 % of the radioactivity in urine, 25 % in feces and 10 % in the expired air. A further bioavailable amount of 8 % was found in selected organs indicating that the bound residues were highly bioavailable. Chromatographic analysis of urine extract revealed the presence of the parent compound, its oxon, desethyl chlorpyrifos and desethyl chlorpyrifos oxon as free metabolites in addition to a conjugated metabolite. It was liberated by acid hydrolysis and identified as 3,5,6-trichloro-2-hydroxypyridine. Bound residues were found to have biological effects such as inhibition of rat plasma ChE, elevations of liver parameters (ALT, AST, and ALP), decrease in total protein and albumin content suggesting a hepatotoxic potential. A significant increase in the values of creatinine, urea, cholesterol, triglycerides and significant decrease in Catalase and Glutathion-S-Transfrase were observed in treated rats. 相似文献
14.
AbdelHamid Sherihan G. Refaat Aya A. Benjamin Anthony M. Elmawardy Laila A. Elgendy Lougine A. Manolly Mark M. Elmaksoud Nada Abd Sherif Nourhan Hamdy Nadia M. 《Environmental science and pollution research international》2021,28(39):54209-54221
Environmental Science and Pollution Research - COVID-19 pandemic waves hitting worldwide result in drastic postinfection complications with interindividual variations, which raised the question for... 相似文献
15.
Hamdy Ellaithy 《The Environmentalist》2005,25(2-4):251-255
Summary This work addresses one of the crucial problems regarding the confusion between the existence of any actual health hazard
as documented and the public perception of this hazard. The wide spread use of Radio Frequency (RF) fields in general and
in mobile communication in particular has warranted a careful assessment of the public response especially in developing nations.
This study comes in response to the growing penetration rate of about 10% of mobile phones in Egypt, which almost exceeds
the current rate of fixed lines. It is based on a survey conducted in 2003 and includes different age groups, different levels
of education, sex and standard of living.
The proposed work discusses the misconceptions and health concerns of the public as far as the spread of mobile communication
is concerned and compare it with similar surveys in different countries and calibrate the results with established scientific
facts. 相似文献
16.
Three Egyptian industrial wastewater management programmes 总被引:1,自引:0,他引:1
Fatma A. El-Gohary Rifaat A. Wahaab Fayza A. Nasr Hamdy I. Ali 《The Environmentalist》2002,22(1):59-65
A pre-treatment programme for wastewater from factories, representing three main industrial sectors in Egypt, has been developed. The first case study was a factory producing potato-chips. Wastewater discharged from this factory was characterized by high values of BOD, SS and oil and grease (6000 mgO2 l–1, 6577 mg l–1 and 119 mg l–1 respectively). Chemical treatment using lime and lime aided by polyelectrolyte achieved good results. Residual values of BOD and SS after treatment were 97 mg l–1 and 49 mg l–1, respectively. Oil and grease concentrations were reduced by 91 percent. Treatment via activated sludge at a detention time of 4 hrs produced good quality effluent. The second case study was an automobile company, representing the metal finishing industry. Analyses of wastewater samples from the degreasing, phosphating and painting departments, as well as the end-of-pipe effluent were conducted. The end-of-pipe effluent contained high concentrations of oil and grease (366 mg l–1), phosphorous (111 mg l–1) and zinc (81 mg l–1). Chemical treatment of end-of-pipe wastewater using ferric chloride aided by lime, produced high quality effluent. The third sector was the chemical industry. For this purpose a paint factory was selected. Characteristics of raw wastewater varied widely according to the production rate. Average values of COD and BOD were 1950 mg l–1 and 683 mg l–1. Oil and grease ranged from 63 to 1624 mg l–1. Chemical treatment using ferric chloride in combination with lime at the optimum operating conditions achieved good results. Residual values after treatment of COD, BOD and oil and grease reached 120, 36 and 8.6 mg l–1, respectively. An engineering design for each case study has been prepared. 相似文献
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Elshanbary Alaa Ahmed Awad Alaa Abdelsameia Abdelsalam Alaa Ibrahim Islam H. Abdel-Aziz Walid Darwish Youssef Bahaaeldin Isa Alaa Saad Drid Boutheyna Mustafa Marwa Gamal Allam Radwa Hamdy Abo Ali Amira A. Nourelden Anas Zakarya Ragab Khaled Mohamed AlGwaiz Hussah I. M. Awaji Aeshah A. Germoush Mousa O. Albrakati Ashraf Piscopo Marina Ghaboura Nehmat Zaazouee Mohamed Sayed 《Environmental science and pollution research international》2022,29(32):47931-47941
Environmental Science and Pollution Research - Sentinel lymph node (SLN) sampling is important for evaluating the nodal stage of breast cancer when the axillary nodes are clinically free of... 相似文献
19.
Hassan Hamdy Yousef Mohamed S. Mohamed Sherif A. Abo-Elfadl Saleh 《Environmental science and pollution research international》2021,28(47):66941-66956
Environmental Science and Pollution Research - A study is presented on the enhancement of solar still (SS) performance by using chimney exhaust gases (EGs) passing through chimney channels under... 相似文献
20.
Ahmed I. El-Seesy Hamdy Hassan Latif Ibraheem Manzoore Elahi M Soudagar 《International Journal of Green Energy》2020,17(12):793-804
ABSTRACT The main challenge of utilizing ethanol in diesel engines in blending mode is the phase separation issue. Therefore, an attempt has been performed to enhance the stability feature of ethanol/Jatropha biodiesel (JME) blends by using n-butanol as co-solvent. The 10% by volume of n-butanol is added to the mixtures of 10% and 20% ethanol and 70% and 80% JME, which is denoted as JME10Bu10E and JME10Bu20E, respectively. The phase stability of the evaluated fuels is examined employing visual approach and Thermogravimetric analysis. These methods confirm that there is no phase separation for more than 2 months under ambient conditions. Then, the combustion and emission features are investigated utilizing a diesel engine run with different loads and constant speed. The findings demonstrate that the pmax. and HRR are increased by adding ethanol. The ignition delay is extended with the addition of ethanol while the combustion period is almost the same. The bsfc is decreased by adding ethanol compared to JME fuel. The CO, UHC, and NOx formations are reduced markedly by 40%, 40%, and 40%, respectively, with adding ethanol. Finally, using n-butanol and JME as co-solvents with ethanol supports the growth of renewable energy in the CI engine. 相似文献