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Tạp chí quốc tế 2016
Số tạp chí DOI 10.1007/s11356-016-6980-y(2016) Trang: 1-9
Tạp chí: Environmental Science and Pollution Research

Organophosphates (e.g. chlorpyrifos ethyl) and carbamates (e.g. fenobucarb) are commonly used to control a wide range of pests in rice fields of the Mekong Delta in Vietnam. This study assesses the combined effect of chlorpyrifos ethyl (CPF) and fenobucarb (F), applied at concentrations used by rice farmers, on the brain acetylcholinesterase (AChE) activity in climbing perch fingerlings from rice fields in the Mekong Delta. It also investigates if Pyridine-2-aldoxime methiodide (2-PAM) can be used to reactivate cholinesterase that has been blocked by CPF. Three days after spraying, the water concentrations of both insecticides decreased quickly below the detection levels. However, the brain AChE activity in fish was inhibited for more than 7 days. The results indicate a quicker but less prolonged inhibition of the brain AChE activity by the mixture than by only CPF. The inhibition levels were above 70 % only during the first 48 h, which could explain why all fish survived. 2-PAM resulted in a significant reactivation of the cholinesterase blocked by a combination of CPF and F, and it is proposed that the reactivation by 2-PAM could provide a way to assess the AChE inhibition levels in organisms, when no unexposed individuals are available as controls. The results indicate that the current use of CPF and F in rice farming in the Mekong Delta is likely to cause negative effects on non-target organisms. Many of these effects may be sub-lethal, and there is a need to develop biomarkers that are relevant, inexpensive and easy to apply. The results show that brain AChE in climbing perch fingerling is a relevant biomarker for monitoring of exposure to, and sublethal impacts from organophosphates and carbamates under tropical conditions in developing countries

Các bài báo khác
Số tạp chí Vol-2, Iss-11 (Nov, 2016)(2016) Trang: 609-612
Tạp chí: Scholars Bulletin
Số tạp chí 4(2016) Trang: 246-255
Tạp chí: The International Journal Of Humanities & Social Studies
Số tạp chí 31(2016) Trang: 085002-085009
Tạp chí: Semiconductor Science and Technology
Số tạp chí 11(2016) Trang: e0165146
Tạp chí: PLoS One
Số tạp chí 7(2016) Trang: 3491-3507
Tạp chí: Biomedical Optics Express
Số tạp chí 145(2016) Trang: 117-119
Tạp chí: Economics Letters
Số tạp chí http://dx.doi.org/10.1287/mnsc.2016.2472(2016) Trang: 1-19
Tạp chí: Management Science
Số tạp chí 2016(2016) Trang: 2016:112
Tác giả: Lê Thanh Tùng
Tạp chí: Journal of Inequalities and Applications
Số tạp chí 8-4(2016) Trang: 513-521
Tạp chí: International Journal of Social Robotics
Số tạp chí 42(2016) Trang: 157-167
Tạp chí: Infant Behavior and Development
Số tạp chí 3(1)(2016) Trang: 30-36
Tác giả: Vương Quốc Duy
Tạp chí: International Journal of Engineering Technology and Management (IJETM)
Số tạp chí 2(1)(2016) Trang: 9-23
Tác giả: Vương Quốc Duy
Tạp chí: International Journal of Advanced Engineering Technology and Innovative Science (IJAETIS)
Số tạp chí 3(2)(2016) Trang: 453-464
Tạp chí: International Journal of Innovative Science, Engineering & Technology

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