排序方式: 共有8条查询结果,搜索用时 15 毫秒
1
1.
I.Y. Mostafa E.F. Shabana Z. Khalil F.I.Y. Mostafa 《Journal of environmental science and health. Part. B》2013,48(5-6):499-512
Abstract The growth and total carbohydrate contents of Nostoc muscorum and Tolypothrix tenuis were greatly and significantly reduced by the application of parathion. “Chlorophyll a”, carotene biosynthesis and the rate of glucose absorption were enhanced after supplementation of parathion to the culture media of both cyanobacteria. Nitrogen released to the media, total nitrogen content and total nitrogen fixed were increased in both organisms‐ Increase in protein content was accompanied by remarkable drop in amino, peptide and ammonia fractions‐ Phosphorus uptake, RNA, DNA and total phosphorus content were accelerated to reach maximum accumulation at the highest insecticide level. In metabolism study using 14C‐labelled compound, parathion was readily degraded by Nostoc and Tolypothrix. Following ten days incubation, the aqueous fractions contained 21.1% and 18.1% of the initial activity in Nostoc and Tolypothrix respectively. TLC analysis of the hydrolytic products revealed the presence of three metabolites: p‐aminophenol, p‐nitrophenol and aminoparathion. 相似文献
2.
El-Missiry Mohamed Amr Shabana Sameh Ghazala Sara J. Othman Azza I. Amer Maggie E. 《Environmental science and pollution research international》2021,28(24):31108-31121
Environmental Science and Pollution Research - The current study aimed to investigate the ameliorative effect of melatonin (MLT) against brain injury in rats undergoing whole-body exposure to... 相似文献
3.
Assessment of the global fallout of plutonium isotopes and americium-241 in the soil of the central region of Saudi Arabia 总被引:1,自引:0,他引:1
A radiochemical technique for determination of plutonium isotopes and 241Am in soil samples is tested against IAEA-standard reference materials to determine its accuracy and precision for reliable results. The technique is then used in the investigation of topsoil samples, collected from the natural environment of the central region of Saudi Arabia, to assess the effect of fallout accumulation of these radionuclides in the region. Plutonium and americium were sequentially separated from all other components of the sample by anion-exchange chromatography and co-precipitated with Nd3+ as fluorides. The precipitates were mounted on membrane filters and measured using a high-resolution alpha-spectrometer. The results of the analysis of the reference materials showed satisfactory sensitivity and precision of the technique. The results of the analyzed soil samples show activity levels ranging from < LLD to 0.089 and from 相似文献
4.
Noman Sohail M. Shafiq Muhammad Bibi Shabana Mittal Bharti Yuan Yumeng Zeng Mi Li Xin Olawale Oluwaseyi Abraham Jiao Xiaoyang Irshad Muhammad 《Environmental science and pollution research international》2023,30(2):2977-2990
Environmental Science and Pollution Research - Antibiotic resistance genes (ARGs) and antimicrobial resistance elements (AMR) are novel environmental contaminants that pose a significant risk to... 相似文献
5.
Levels of dechlorane plus and polybrominated diphenylethers in human milk in two Canadian cities 总被引:1,自引:0,他引:1
Siddique S Xian Q Abdelouahab N Takser L Phillips SP Feng YL Wang B Zhu J 《Environment international》2012,39(1):50-55
Flame retardant dechlorane plus (DP) and several polybrominated diphenylether (PBDE) congeners have been measured in 87 human milk samples collected in two Canadian cities: Kingston and Sherbrooke. The levels of PBDEs in human milk (mean (median), ng g− 1 lipid weight = 10 (5.9), 4.1 (2.8), 3.0 (1.6), 5.12 (1.6), and 15 (ND) for BDE-47, BDE-99, BDE-100, BDE-153, and BDE-209, respectively) were comparable to those reported in Europe, U.S.A. and China. The levels of DP, with a mean value of 0.98 ng g− 1 and a median value of 0.60 ng g− 1 (lipid weight), were two to ten times lower than those of concurrently measured major PBDEs including BDE-209. While there is little difference in the levels of measured contaminants in milk samples collected from the two cities, the contaminants levels in human milk show, indicated by Principal Components Analysis, that DP, deca-BDE, and penta-BDE come from three distinct sources. The mean and median isomer ratio values of DP in milk were 0.67 and 0.69, respectively, very similar to that of DP commercial products. 相似文献
6.
Nasir Muhammad Rehman Faiz Ur Kishwar Shabana Bashir Saima Adil Muhammad 《Environment, Development and Sustainability》2021,23(9):13590-13606
Environment, Development and Sustainability - This study explores the adverse impact of air pollution, caused by emissions from brick kilns, on the children’s cognitive ability and physical... 相似文献
7.
Sources and environmental behavior of dechlorane plus--a review 总被引:3,自引:0,他引:3
Intensive research has been carried out in the past few years on the occurrence and behavior of dechlorane plus (DP) in the environment, biota and humans. This review summarizes the information and research results generated since DP was first identified in the environment in 2006. We describe the reported measurement methods for DP and provide an integrated picture of its occurrence and behavior as an environmental contaminant. DP in ambient air and sediments is characterized by strong source related concentration elevations and temporal trends reflecting commercial use. Long-range atmospheric transportation of DP has been observed in remote regions, indicating a global presence of DP. Levels of DP in biota and in humans further reinforce its source related distribution. The change in DP isomer ratio in various environmental matrices from commercial products indicates that the behavior of the two isomers is not the same in the environment or in biota. With only limited data available so far, the biomagnification of DP in aquatic biota has not been conclusively demonstrated. This review also looks at reported dechlorination products of DP that might be of interest in future research. 相似文献
8.
Islam Md. Rezaul Rahman Md. Mominur Ahasan Md. Tanjimul Sarkar Nadia Akash Shopnil Islam Mahfuzul Islam Fahadul Aktar Most. Nazmin Saeed Mohd Harun-Or-Rashid Md. Hosain Md. Kawsar Rahaman Md. Saidur Afroz Sadia Bibi Shabana Rahman Md. Habibur Sweilam Sherouk Hussein 《Environmental science and pollution research international》2022,29(46):69341-69366
Environmental Science and Pollution Research - The emergence of various diseases during the COVID-19 pandemic made health workers more attentive, and one of the new pathogens is the black fungus... 相似文献
1