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51.
Ali N Dashti N Al-Mailem D Eliyas M Radwan S 《Environmental science and pollution research international》2012,19(3):812-820
Introduction
Transconjugant bacteria with combined potential for hydrocarbon utilization and heavy metal resistance were suggested by earlier investigators for bioremediation of soils co-contaminated with hydrocarbons and heavy metals. The purpose of this study was to offer evidence that such microorganisms are already part of the indigenous soil microflora. 相似文献52.
A sequential extraction technique was applied to estimate the chemical association of Mn, Zn, Cu and Pb in five chemical phases (exchangeable, carbonate, Fe–Mn oxides, organic matter and residual) in sediments of the Gulf of Aden, Yemen. The results indicated that a higher level of Mn was associated with the residual fraction (natural sources) than the non-residual fraction (anthropogenic sources). Zn fractionations revealed that it was associated more with Fe–Mn oxides and organic fractions than exchangeable and carbonate fractions. Most of the Cu was present in the residual form (60–72%) except for in the main port area (zone III), where it was associated with the organic phase (77% of the total Cu content, the organic matter content was 5%). Similarly, most Pb was bound in the residual fraction (56–71%) except the main port area where ~ 62% of the total Pb was bound in non-residual fractions. It was also found that the Pb concentration in the exchangeable fraction was very high compared with other metals. The risk assessment code for the metals showed a low risk for Zn and Cu, but low to medium risk for Mn. Fractionation of Pb showed medium risk at most of the regions except at the eastern area, which revealed a high risk for the aquatic environment. 相似文献
53.
Biomonitoring has become a useful tool in environmental risk assessment of anthropogenic activities releasing disturbing pollutants. Permethrin, used worldwide to control a wide range of pest insects, can threaten aquatic biota, potentially useful as precocious bioindicators in ecotoxicology. This study seeks to assess the acute toxicity permethrin to the freshwater beetle, its availability in water, as well as, its uptake. The acute toxicity of permethrin to non-target species was studied under laboratory conditions to assess its effect, after the exposure 48 h, on the freshwater beetle Laccophilus minitus considering changes in some enzymatic activities; a specific biomarker of neurotoxicity (acetylcholinesterase) and a non-specific biomarker of oxidative stress (superoxide dismutase and catalase). The rates of permethrin in water and insects were determined using gas chromatography. The low measured concentration of the pesticide 0.0013 μg/L didńt modify the SOD and CAT activities in comparison with controls, only the high concentrations (0.023 and 0.18 μg/L) induced a significant increase in the enzyme activity. A similar profile was recorded for the H2O2 level. The permethrin treatment induced a drastic depletion of AChE activity. As outcomes, uptake at a low level (<6.8 ± 0.43 ng/g dry weight) showed to be the factor underlying the alterations in the beetles exposed to permethrin. Such findings provide information on the behaviour of permethrin within the environment and its biological target through its neurotoxicity and induction of oxidative stress in a freshwater beetle. 相似文献
54.
Mandour Ahmed S. Elsayed Roushdy F. Ali Asmaa O. Mahmoud Ahmed E. Samir Haney Dessouki Amina A. Matsuura Katsuhiro Watanabe Izumi Sasaki Kazuaki Al-Rejaie Salim Yoshida Tomohiko Shimada Kazumi Tanaka Ryou Watanabe Gen 《Environmental science and pollution research international》2021,28(7):7815-7827
Environmental Science and Pollution Research - Copper deficiency (CuD) is a common mineral disorder in ruminants, which causes histomorphological changes in the heart due to disturbances in... 相似文献
55.
Michael J. Roast Samir Martins Lourdes Fernández-Peralta José Carlos Báez Ahmed Diame David March Jazel Ouled-Cheikh Adolfo Marco Jacob González-Solís Luis Cardona 《Conservation biology》2023,37(5):e14110
Fisheries bycatch is a critical threat to sea turtle populations worldwide, particularly because turtles are vulnerable to multiple gear types. The Canary Current is an intensely fished region, yet there has been no demographic assessment integrating bycatch and population management information of the globally significant Cabo Verde loggerhead turtle (Caretta caretta) population. Using Boa Vista island (Eastern Cabo Verde) subpopulation data from capture–recapture and nest monitoring (2013–2019), we evaluated population viability and estimated regional bycatch rates (2016–2020) in longline, trawl, purse-seine, and artisanal fisheries. We further evaluated current nesting trends in the context of bycatch estimates, existing hatchery conservation measures, and environmental (net primary productivity) variability in turtle foraging grounds. We projected that current bycatch mortality rates would lead to the near extinction of the Boa Vista subpopulation. Bycatch reduction in longline fisheries and all fisheries combined would increase finite population growth rate by 1.76% and 1.95%, respectively. Hatchery conservation increased hatchling production and reduced extinction risk, but alone it could not achieve population growth. Short-term increases in nest counts (2013–2021), putatively driven by temporary increases in net primary productivity, may be masking ongoing long-term population declines. When fecundity was linked to net primary productivity, our hindcast models simultaneously predicted these opposing long-term and short-term trends. Consequently, our results showed conservation management must diversify from land-based management. The masking effect we found has broad-reaching implications for monitoring sea turtle populations worldwide, demonstrating the importance of directly estimating adult survival and that nest counts might inadequately reflect underlying population trends. 相似文献
56.
Jabeur Fadoua Mechri Sondes Mensi Fethi Gharbi Ines Naser Yosri Ben Kriaa Mouna Bejaoui Nejla Bachouche Samir Badis Abdelmalek Annane Rachid Djellali Mostapha Sadok Saloua Jaouadi Bassem 《Environmental science and pollution research international》2022,29(24):36023-36039
Environmental Science and Pollution Research - The diversity of marine biomasses is a set of exploitable and renewable resources with application in several sectors. In this context, a co-culture... 相似文献
57.
El Sebaey Aya Farag Atlam Samir Abd El Mageed El Kafas El Sayed Abd El Rahman Zayed Hanaa Abdelaziz 《Environmental science and pollution research international》2022,29(10):14371-14379
Environmental Science and Pollution Research - Health care-associated infections are reported among the top causes of hospital deaths worldwide. Their prevention is a first priority for patient... 相似文献
58.
Zarrouk Tarik Salhi Jamal-Eddine Atlati Samir Nouari Mohammed Salhi Merzouki Salhi Najim 《Environmental science and pollution research international》2022,29(1):98-105
Environmental Science and Pollution Research - The machining of Nomex honeycomb structures represents a technical and scientific barrier for aeronautical applications. The difficulties encountered... 相似文献
59.
Samir Marwa Geioushy Ramadan A. El-Sherbiny Samya Fouad Osama A. 《Environmental science and pollution research international》2022,29(48):72515-72527
Environmental Science and Pollution Research - In this work, the effect of using Ag-doped TiO2 nanopigments on optical, mechanical and antimicrobial properties of coated paper was explored.... 相似文献