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排序方式: 共有104条查询结果,搜索用时 15 毫秒
51.
Nathalie Pradel Jean-Luc Cayol Marie-Laure Fardeau Fatma Karray Sami Sayadi Didier Alazard Bernard Ollivier 《Environmental science and pollution research international》2016,23(5):4046-4053
The occurrence of magnetotactic bacteria (MTB) on a Tunisian marine coast exposed to heavy metals pollution (Sfax, Gulf of Gabès, Mediterranean Sea) was investigated. The MTB population of this Southern Mediterranean coast was compared to the MTB populations previously investigated on the French Northern Mediterranean coast. A dominant MTB coccus morphotype was observed by microscopy analysis. By pyrosequencing technology, the analysis of the 16S ribosomal RNA (rDNA) revealed as much as 33 operational taxonomic sequence units (OTUs) close to sequences of MTB accessible in the databases. The majority were close to MTB sequences of the “Med group” of α-Proteobacteria. Among them, a dominant OTU_001 (99 % of the MTB sequences) affiliated within the Magnetococcales order was highlighted. Investigating the capacities of this novel bacterium to be used in bioremediation and/or depollution processes could be envisaged. 相似文献
52.
Sezin Erarpat Gözde Özzeybek Dotse Selali Chormey Fatih Erulaş Fatma Turak Sezgin Bakırdere 《Environmental monitoring and assessment》2017,189(10):528
Polycyclic aromatic hydrocarbons are known for their carcinogenic and mutagenic effects on human health. This therefore calls for the regulation of their concentrations in air, water, and soil. Naphthalene as the simplest in structure of the polycyclic aromatic hydrocarbons is mainly used as a starter material for other chemicals but also has impacts on human health. A method is therefore proposed for the determination of naphthalene in water samples by gas chromatography mass spectrometry after liquid-liquid extraction. The extraction method was optimized to improve the extraction output, thereby lowering the limit of detection. The limits of detection and quantification obtained for naphthalene were 4.4 and 14.6 ng mL?1, respectively. Deuterated anthracene was used as internal standard to enhance the precision of the method, for which a relative standard deviation of 4.3% was obtained. The percent recovery of naphthalene obtained from tap water was ranged between 93.8 and 102.2. 相似文献
53.
54.
Fatma M. El-Demerdash 《Journal of environmental science and health. Part. B》2013,48(4):262-268
A mixture of pyrethroids plus organophosphates was assessed for their potential effects on lipid peroxidation, the antioxidant defense system and lactate dehydrogenase (LDH) in rat kidney in vitro. Various insecticide concentrations were incubated with kidney homogenate at 37°C for different incubation times. Treatment with fenitothion (FNT) plus lambda-cyhalothrin (LC) caused a significant induction (P < 0.05) in thiobarbituric acid reactive substances (TBARS), which might be associated to decreased levels of reduced glutathione (GSH), superoxide dismutase (SOD), catalase (CAT), glutathione S-transferase (GST) activities and protein content in rat kidney. However, a significant induction of lactate dehydrogenase (LDH) activity was observed. The effect was concentration and time dependent. It can be concluded that depletion of GSH might indicate that reactive oxygen species (ROS) could be involved in the toxic effects of FNT plus LC which lead to marked perturbations in antioxidant defense system. 相似文献
55.
Khitous Mohamed Saber Meryem Tirichine Nassima Aiouaz Fatma 《Journal of Material Cycles and Waste Management》2022,24(5):1786-1796
Journal of Material Cycles and Waste Management - In this investigation, mesophilic co-digestion of both slaughterhouse waste (SHW) with household waste (HSW) was carried out using a 50 L... 相似文献
56.
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
57.
Saniye Turk Culha Hakkı Dereli Fatma Rabia Karaduman Mehmet Culha 《Environmental science and pollution research international》2016,23(12):11584-11597
This study was performed to determine the concentrations of some trace metals (Cd, Cu, Pb, Ni, Zn, and Fe) in Holothuria tubuosa (Gmelin, 1788) belonging to Echinoderm species and in sediments that they live at three different stations (Gelibolu, Umur Bey/Lapseki, and Dardanos) on Dardanelles Strait between April 2013 and March 2014. The mean trace metal concentrations determined in H. tubulosa and sediment were as follows: Cd 0.18 mg/kg, Cu 2.43 mg/kg, Pb 2.09 mg/kg, Ni 14.58 mg/kg, Zn 16.86 mg/kg, and Fe 73.46 mg/kg and Cd 0.70 mg/kg, Cu 5.03 mg/kg, Pb 14.57 mg/kg, Ni 27.15 mg/kg, Zn 54.52 mg/kg, and Fe 3779.9 mg/kg, respectively. It was detected that the statistical difference between trace metals determined seasonally in muscle tissue of H. tubulosa was significant (p?>?0.05). As a result of the study, it was detected that H. tubulosa is a bioindicator species in determining Ni trace metal in sediment. The results were compared to the limit values of National and International Food Safety, and it was detected that Cd and Ni concentrations measured in sediment were above LEL of Ni and Cd concentrations according to Sediment Quality Guidelines. 相似文献
58.
Mohammed Asmaa N. Radi Abeer M. Khaled Rehab Abo El-Ela Fatma I. Kotp Amna A. 《Environmental science and pollution research international》2020,27(34):42791-42805
Environmental Science and Pollution Research - New approaches are required for prevention and control of biofilm-producing bacteria and consequently mitigating the health problems of bovine... 相似文献
59.
Dieng Hamady Ellias Salbiah Binti Satho Tomomitsu Ahmad Abu Hassan Abang Fatimah Ghani Idris Abd Noor Sabina Ahmad Hamdan Zuharah Wan Fatma Morales Vargas Ronald E. Morales Noppawan P. Hipolito Cirilo N. Attrapadung Siriluck Noweg Gabriel Tonga 《Environmental science and pollution research international》2017,24(17):14782-14794
Environmental Science and Pollution Research - In dengue mosquitoes, successful embryonic development and long lifespan are key determinants for the persistence of both virus and vector. Therefore,... 相似文献
60.
Nahla Soliman El-Shenawy Fatma Afifi Ali El Deeb Sara Ali Mansour Maha Farid Mohamed Soliman 《毒物与环境化学》2017,99(3):460-468
The effects of sub-lethal concentrations of bisphenol A on some biochemical parameters in Biomphalaria alexandrina snail's hemolymph and tissues as well as on histological changes of the hermaphrodite gland were evaluated. Adult snails were exposed to sub-lethal concentrations for four weeks and samples of snails were investigated after two and four weeks. Total protein and albumin levels in hemolymph, as well as lipid peroxidation and glutathione contents of snails’ tissues, were measured. After two weeks of exposure, total protein content and albumin levels decreased in all groups. Elevation of lipid peroxidation levels was correlated with decreasing glutathione content in the treated snails. Histological examination of the hermaphrodite gland revealed deformations in eggs and affected sperm production. 相似文献