排序方式: 共有103条查询结果,搜索用时 15 毫秒
51.
Khaled Bellassoued Asma Hamza Jos van Pelt Abdelfatteh Elfeki 《Environmental monitoring and assessment》2013,185(2):1137-1150
The aim of this work was to investigate for Sarpa salpa the seasonal trend in the food sources, heavy metals bioaccumulation and the oxidative stress in the organs. In addition, the toxicity was assessed by mouse bioassay of extract of the fish's organs collected in autumn, the peak of occurrence of hallucinatory syndrome. The toxicity was further studied for compounds present in epiphyte collected from the sea at the end of spring and in summer that are digested by the S. salpa in these seasons. We observed a higher lipid peroxydation in different tissues of S. salpa compared to the control fish Diplodus annularis. Furthermore, heavy metals accumulation in organs of these fish showed a significant variation between the two species (P?<?0.05). The lethal dose (LD50%) determined for crude ciguatoxin (neurotoxins) extracts of viscera, liver, brain and muscle of S. salpa were as follows: 1.217, 2.195, 14.395, 18.645 g/kg mouse, respectively. We noticed a significant correlation (P?<?0.05) between the total amount of toxic dinoflagellates and the level of TBARS in the liver, the brain and the muscle, this for all seasons and all sizes. Moreover, the cytotoxic effect observed for epiphytes extract confirms the transfer of toxins originating from toxic dinoflagellates, which live as epiphytes on P. oceanica leaves, to the fish by grazing. Our work indicates that, toxic phytoplanktons and heavy metals accumulation are responsible for the increase of oxidative stress in the organs of S. salpa. Hence, the edible part of S. salpa, especially the viscera and liver, can cause a threat to human health, and consumption should, for this reason, be dissuaded. 相似文献
52.
Zulfiqar A Paulose B Chhikara S Dhankher OP 《Environmental pollution (Barking, Essex : 1987)》2011,159(10):3123-3128
Chromium pollution is a serious environmental problem with few cost-effective remediation strategies available. Crambe abyssinica (a member of Brassicaseae), a non-food, fast growing high biomass crop, is an ideal candidate for phytoremediation of heavy metals contaminated soils. The present study used a PCR-Select Suppression Subtraction Hybridization approach in C.?abyssinica to isolate differentially expressed genes in response to Cr exposure. A total of 72 differentially expressed subtracted cDNAs were sequenced and found to represent 43 genes. The subtracted cDNAs suggest that Cr stress significantly affects pathways related to stress/defense, ion transporters, sulfur assimilation, cell signaling, protein degradation, photosynthesis and cell metabolism. The regulation of these genes in response to Cr exposure was further confirmed by semi-quantitative RT-PCR. Characterization of these differentially expressed genes may enable the engineering of non-food, high-biomass plants, including C.?abyssinica, for phytoremediation of Cr-contaminated soils and sediments. 相似文献
53.
Kaouthar Kessabi Zohra Hwas Asma Sassi Khaled Said Imed Messaoudi 《Environmental science and pollution research international》2014,21(24):14099-14109
The present study illustrates an analysis of histological changes; cadmium (Cd), copper (Cu) and zinc (Zn) accumulation; and metallothionein (MT) levels in normal and deformed Mediterranean killifish, Aphanius fasciatus (Pisces, Cyprinodontidae), collected from unpolluted (S1) and polluted areas (S2) in the Gulf of Gabes in Tunisia. Metal determination in water and sediment showed that the concentrations were significantly higher (p?0.0001) in S2 compared to S1. Deformed fish showed a significantly higher accumulation of Cd, Cu, and Zn and high levels of MTs in their tissues compared to normal ones. Histopathological investigations revealed greater changes in gills, kidney, liver, and bone tissues of fish from the polluted area than those recorded in fish from the reference area. In comparison to normal fish of the polluted area (S2), tissue alterations were more developed in deformed specimens of this site. A possible relationship between metallic pollution, incidence of spinal deformities, and histological changes in A. fasciatus in the polluted site was discussed. 相似文献
54.
Shahzad Tahir Shah Syed Tahir Hussain Rais Syed Imran Mansoor Abdul Zaman Khalid 《Environmental science and pollution research international》2022,29(35):52635-52654
Environmental Science and Pollution Research - Recent environmental research has found that people with higher incomes and in more developed countries are more willing to pay (WTP) to protect their... 相似文献
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Akil Ahm Jamal Akhter Siddique Mohammad Asaduddin Laskar Rajeev Kumar Siti Hamidah Mohd-Setapar Asma Khatoon Rayees Ahmad Shiekh 《环境科学学报(英文版)》2015,27(5):104-123
The direct determination of toxic metal ions, in environmental samples, is difficult because of the latter's presence in trace concentration in association with complex matrices, thereby leading to insufficient sensitivity and selectivity of the methods used. The simultaneous removal of the matrix and preconcentration of the metal ions, through solid phase extraction, serves as the promising solution. The mechanism involved in solid phase extraction (SPE) depends on the nature of the sorbent and analyte. Thus, SPE is carried out by means of adsorption, ion exchange, chelation, ion pair formation, and so forth. As polymeric supports, the commercially availableAmberlite resins have been found very promising for designing chelating matrices due to its good physical and chemical properties such as porosity, high surface area, durability and purity. This review presents an overview of the various works done on the modification of Amberlite XAD resins with the objective of making it an efficient sorbent. The methods of modifications which are generally based on simple impregnation, sorption as chelates and chemical bonding have been discussed. The reported results, including the preconcentration limit, the detection limit, sorption capacity, preconcentration factors etc., have been reproduced. 相似文献
57.
Anser Muhammad Khalid Usman Muhammad Godil Danish Iqbal Shabbir Malik Shahzad Sharif Arshian Tabash Mosab I. Lopez Lydia Bares 《Environmental science and pollution research international》2021,28(37):51105-51118
Environmental Science and Pollution Research - This study analyzes the relationship between globalization, energy consumption, and economic growth among selected South Asian countries to promote... 相似文献
58.
Sanatkar Fateme Khoobi Asma Salavati-Niasari Masoud 《Environmental science and pollution research international》2021,28(9):10791-10803
Environmental Science and Pollution Research - In this work, copper hexaferrite (CuFe12O19) nanostructures are successfully synthesized by the sol-gel autocombustion route. Two natural reagents... 相似文献
59.
Liu Yadong Saleem Sharjeel Shabbir Rizwan Shabbir Malik Shahzad Irshad Adil Khan Shahbaz 《Environmental science and pollution research international》2021,28(16):20174-20187
Environmental Science and Pollution Research - This study explores the new area of corporate social responsibility (CSR) and financial performance in the context of the fintech technology. The... 相似文献
60.
Josephine Al-Alam Asma Chbani Ziad Fajloun 《Journal of environmental science and health. Part. B》2013,48(11):788-796
Pesticides are a real concern for the society as their use has become critical, leading sometimes to their accumulation as residues in fruits and vegetables. After examining the pesticides sold in Northern Lebanon, this study is focused on the analysis and identification of pesticides residues in fruits and vegetables that are harvested in this region and treated with the locally sold pesticides. Results show: first, (i) a use of Zineb by the name of another pesticide Micronized Sulfur to avoid prosecution; (ii) a significant presence of Metalaxyl in lemons and oranges; (iii) a significant presence of Trifluralin in strawberries; and (iv) a significant presence of Zineb in lemons and tomatoes. Second, with the use of hemolytic tests on human blood results show: (i) a critical concentration and a significant hemolytic effect of some pesticides used in Lebanon; and (ii) an absence of hemolytic effect in the collected fractions of the different analyzed fruit extracts containing pesticides. Finally, this work is the first step for pesticides' analysis in vegetables and fruits in Lebanon, initiating a wider analytical study in order to control and examine the use of pesticides which, according to our results, could have an adverse effect on human health over a long term. 相似文献