排序方式: 共有57条查询结果,搜索用时 250 毫秒
51.
Heba M. Abdou Hend M. Hussien Mokhtar I. Yousef 《Journal of environmental science and health. Part. B》2013,48(4):306-314
The involvement of reactive oxygen species (ROS) has been implicated in the toxicity of various pesticides. Our study was designed to investigate the induction of oxidative stress by cypermethrin; a Type II pyrethroid in rat liver and kidney. In addition, the protective role of sesame oil against the toxicity of cypermethrin was investigated. Animals were divided into four equal groups; the first group used as control while groups 2, 3 and 4 were treated with sesame oil (5 mL/kg b.w), cypermethrin (12 mg/kg b.w) and the combination of both sesame oil (5 mL/kg b.w) plus cypermethrin (12 mg/kg b.w), respectively. Rats were daily administered with their respective doses for 30 days by gavage. Repeated oral administration of cypermethrin was found to reduce the level of glutathione (GSH) and the activities of the antioxidant enzymes. While, the level of TBARS was elevated indicating the presence of oxidative stress. The activities of LDH, AST and ALT were decreased in the liver extract while increased in the plasma of the cypermethrin-treated group. Also, the levels of urea and creatinine were significantly increased after treatment with cypermethrin. Liver and kidney injury was confirmed by the histological changes. In conclusion, the administration of sesame oil provided significant protection against cypermethrin-induced oxidative stress, biochemical changes, histopathological damage and genomic DNA fragmentation. 相似文献
52.
Mirsaleh Mirmohammadi Javad Gholamnejad Vahidoddin Fattahpour Pejman Seyedsadri Yousef Ghorbani 《Journal of environmental management》2009
This paper depicts the method used to quantify the environmental impact of mining activities in surface mine projects. The affected environment was broken down into thirteen components, such as Human health and immunity, Surface water, Air quality, etc. The effect of twenty impacting factors from the mining and milling activities was then calculated for each Environmental Component. Environmental assessments are often performed by using matrix methods in which one dimension of the matrix is the “Impacting Factor” and the other one is the “Environmental Components”. For the presented matrix method, each Impacting Factor was first given a magnitude between −10 and 10. These factors are used to set up a matrix named Impacting Factor Matrix, whose elements represent the Impacting Factor values. The effects of each Impacting Factor on each Environmental Component were then quantified by multiplying the Impacting Factor Matrix by Weighting Factor Matrix. The elements of the weighting factors matrix reflect the effects of each Impacting Factor on each Environmental Component. The outlined method was originally developed for a mining and milling operation in Iran, but it can successfully be used for mining ventures and more general industrial activities in other countries in accordance to their environmental regulations and laws. 相似文献
53.
北京大气重污染过程PM10中水溶性盐的研究 总被引:11,自引:2,他引:11
利用大气颗粒物快速捕集及化学成分在线分析系统,观测了2004年秋季北京出现的一次长时间严重污染天气过程中PM10的水溶性无机盐浓度的变化结果表明,PM10中总水溶性无机盐浓度在这次重污染过程中升高了4.7倍.硝酸盐、硫酸盐、铵盐的浓度分别升高7.9,4.1,5.4倍,这3种无机盐的日变化在污染期和非污染期有明显差异.污染期S2、Nox向SO42-、NO3转化率明显高于非污染期. 相似文献
54.
El-Laham Yousef Bugallo Mónica Lynch Heather J. 《Environmental and Ecological Statistics》2022,29(3):607-624
Environmental and Ecological Statistics - Tracking individual animals through time using mark-recapture methods is the gold standard for understanding how environmental conditions influence... 相似文献
55.
Rashtbari Yousef Afshin Shirin Hamzezadeh Asghar Gholizadeh Abdolmajid Ansari Farshid Jaberi Poureshgh Yousef Fazlzadeh Mehdi 《Environmental science and pollution research international》2022,29(4):5194-5206
Environmental Science and Pollution Research - Water contamination due to release of dye containing effluents is one of the environmental problems of serious concern today. The present study... 相似文献
56.
Baqer Yousef Chen Xiaohui 《Environmental science and pollution research international》2022,29(32):47873-47901
Environmental Science and Pollution Research - This work comprehensively reviews the equations governing multicomponent flow and reactive transport in porous media on the pore-scale, mesoscale and... 相似文献
57.
Sharaf Mohamed Yousef Mohamed S. Huzayyin Ahmed S. 《Environmental science and pollution research international》2022,29(18):26131-26159
Environmental Science and Pollution Research - Photovoltaic (PV) panels are one of the most important solar energy sources used to convert the sun’s radiation falling on them into electrical... 相似文献