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排序方式: 共有274条查询结果,搜索用时 15 毫秒
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Bin-Jumah May N. AL-Huqail Arwa Abdulkreem Abdelnaeim Noha Kamel Mohamed Fouda Maged M A Abulmeaty Mahmoud M A Saadeldin Islam M. Abdel-Daim Mohamed M. 《Environmental science and pollution research international》2021,28(21):26653-26663
Environmental Science and Pollution Research - Acrylamide (AA) is a hazardous chemical that is widely used in industrial practices. Spirulina platensis (SP) is a blue green alga that is rich in... 相似文献
3.
Farouk Sameh Mohamed Gad Fatma Abdel-monem Emam Mahmoud Abdelghaffar 《Environmental science and pollution research international》2021,28(5):5332-5346
Environmental Science and Pollution Research - Diazinon (DZN), a common organophosphorus insecticide (OPI), has hazardous effect to human and animals with its ubiquitous use. Considering the... 相似文献
4.
Mohamed Zakaria A. Hashem Mohamed Alamri Saad Campos Alexandre Vasconcelos Vitor 《Environmental science and pollution research international》2021,28(28):37041-37050
Environmental Science and Pollution Research - Harmful cyanobacterial blooms (HCB) have severe impacts on marine and freshwater systems worldwide. They cause oxygen depletion and produce potent... 相似文献
5.
Mahmoud Marwa M. Sanad Eman F. Hamdy Nadia M. 《Environmental science and pollution research international》2021,28(28):36984-37000
Environmental Science and Pollution Research - The discovery of microRNAs (miRNAs) 20 years ago has advocated a new era of “small molecular genetics.” About 2000 miRNAs are present that... 相似文献
6.
Enzymatic decolourization of the azo dye, Direct Yellow (DY106) by Cucurbita pepo (courgette) peroxidase (CP) is a complex process, which is greatly affected by pH, temperature, enzyme activity and the concentrations of H2O2 and dye. Courgette peroxidase was extracted and its performance was evaluated by using the free-CP (FCP) and immobilized-CP (ICP) forms in the decolourization of DY106. Immobilization of peroxidase in calcium alginate beads was performed according to a strategy aiming to minimize enzyme leakage and keep its activity at a maximum value by optimizing sodium alginate content, enzyme loading and calcium chloride concentration. The initial conditions at which the highest DY106 decolourization yield was obtained were found at pH 2, temperature 20℃, H2O2 dose 1 mmol/L (FCP) and 100 mmol/L (ICP). The highest decolourization rates were obtained for dye concentrations 50 mg/L (FCP) and 80 mg/L (ICP). Under optimal conditions, the FCP was able to decolorize more than 87% of the dye within 2 min. While with ICP, the decolourization yield was 75% within 15 min. The decolourization and removal of DY106 was proved by UV-Vis analysis. Fourier transform infrared (FT-IR) spectroscopy analysis was also performed on DY106 and enzymatic treatment precipitated byproduct. 相似文献
7.
Omran E. Frihy Mahmoud Kh. El-Sayed 《Mitigation and Adaptation Strategies for Global Change》2013,18(8):1215-1237
Consequence of the sea level rise (SLR) on the Mediterranean coastal areas in Egypt, particularly the Nile River Delta, has become an issue of major concern to Egypt’s population and the government. Previous publications disregard the entire Mediterranean coast of Egypt as an integral unit subject to the impacts of the SLR. This study aims to analyzing the risks, ranking the vulnerability and suggesting adaptation measures to mitigate the impact of the SLR along the Mediterranean coast of Egypt. Although the prominent features of Egypt’s Mediterranean coastal zone are the low lying coast of the Nile Delta, associated with land subsidence, tectonic activities and erosion; the contiguous coastal sectors are backed by shore-parallel carbonate ridges and Plateau (the western coast) and sand dune belts (Sinai coast). The coastal zone is ranked as high, moderate, and low vulnerable to the SLR. The social and biophysical vulnerabilities demonstrate the asymmetrical impacts of the SLR on the Mediterranean coast of Egypt. Areas at risk in the Alexandria region are Mandara and El Tarh whereas in the Nile Delta region, they are the Manzala Lagoon barrier, east and west of the Rosetta City, Gamil, and the Tineh plain. Risk associated with these impacts may be reduced provided the consideration of immediate and adequate adaptation measures. 相似文献
8.
Linking ground-water age and chemistry data along flow paths: implications for trends and transformations of nitrate and pesticides 总被引:2,自引:1,他引:1
Tesoriero AJ Saad DA Burow KR Frick EA Puckett LJ Barbash JE 《Journal of contaminant hydrology》2007,94(1-2):139-155
Tracer-based ground-water ages, along with the concentrations of pesticides, nitrogen species, and other redox-active constituents, were used to evaluate the trends and transformations of agricultural chemicals along flow paths in diverse hydrogeologic settings. A range of conditions affecting the transformation of nitrate and pesticides (e.g., thickness of unsaturated zone, redox conditions) was examined at study sites in Georgia, North Carolina, Wisconsin, and California. Deethylatrazine (DEA), a transformation product of atrazine, was typically present at concentrations higher than those of atrazine at study sites with thick unsaturated zones but not at sites with thin unsaturated zones. Furthermore, the fraction of atrazine plus DEA that was present as DEA did not increase as a function of ground-water age. These findings suggest that atrazine degradation occurs primarily in the unsaturated zone with little or no degradation in the saturated zone. Similar observations were also made for metolachlor and alachlor. The fraction of the initial nitrate concentration found as excess N2 (N2 derived from denitrification) increased with ground-water age only at the North Carolina site, where oxic conditions were generally limited to the top 5 m of saturated thickness. Historical trends in fluxes to ground water were evaluated by relating the times of recharge of ground-water samples, estimated using chlorofluorocarbon concentrations, with concentrations of the parent compound at the time of recharge, estimated by summing the molar concentrations of the parent compound and its transformation products in the age-dated sample. Using this approach, nitrate concentrations were estimated to have increased markedly from 1960 to the present at all study sites. Trends in concentrations of atrazine, metolachlor, alachlor, and their degradates were related to the timing of introduction and use of these compounds. Degradates, and to a lesser extent parent compounds, were detected in ground water dating back to the time these compounds were introduced. 相似文献
9.
A Regional Classification Scheme for Estimating Reference Water Quality in Streams Using Land-Use-Adjusted Spatial Regression-Tree Analysis 总被引:1,自引:0,他引:1
Various approaches are used to subdivide large areas into regions containing streams that have similar reference or background
water quality and that respond similarly to different factors. For many applications, such as establishing reference conditions,
it is preferable to use physical characteristics that are not affected by human activities to delineate these regions. However,
most approaches, such as ecoregion classifications, rely on land use to delineate regions or have difficulties compensating
for the effects of land use. Land use not only directly affects water quality, but it is often correlated with the factors
used to define the regions. In this article, we describe modifications to SPARTA (spatial regression-tree analysis), a relatively
new approach applied to water-quality and environmental characteristic data to delineate zones with similar factors affecting
water quality. In this modified approach, land-use-adjusted (residualized) water quality and environmental characteristics
are computed for each site. Regression-tree analysis is applied to the residualized data to determine the most statistically
important environmental characteristics describing the distribution of a specific water-quality constituent. Geographic information
for small basins throughout the study area is then used to subdivide the area into relatively homogeneous environmental water-quality
zones. For each zone, commonly used approaches are subsequently used to define its reference water quality and how its water
quality responds to changes in land use. SPARTA is used to delineate zones of similar reference concentrations of total phosphorus
and suspended sediment throughout the upper Midwestern part of the United States. 相似文献
10.
Abdel-Daim Mohamed M. Abo El-Ela Fatma I. Alshahrani Fatima K. Bin-Jumah May Al-Zharani Mohammed Almutairi Bader Alyousif Mohamed S. Bungau Simona Aleya Lotfi Alkahtani Saad 《Environmental science and pollution research international》2020,27(30):37709-37717
Environmental Science and Pollution Research - Acrylamide (AA), an industrial monomer, may cause multi-organ toxicity through induction of oxidative stress and inflammation. The antioxidant... 相似文献