کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6382229 | 1625944 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamics of sub-lethal effects of nano-CuO on the microalga Chlamydomonas reinhardtii during short-term exposure
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Though nano-CuO has been classified as toxic toward aquatic microorganisms and its use in various applications is expected to increase in near future, its ecotoxicity is currently poorly understood. The aim of this study was to investigate the mechanisms of nano-CuO toxicity based on the paradigm of oxidative stress, the dynamics of response over 24 h, and the modulating effect of exposure conditions on toxicity and responses. To this end, the model microalga Chlamydomonas reinhardtii was exposed to 10 mg Lâ1 nano-CuO in five different exposure media, including two different growth media, two Good's buffers, and natural lake water. The measured endpoints included cell growth, morphological aspect, chlorophyll autofluorescence, oxidative stress, and membrane permeabilization. The results suggest that agglomerated nano-CuO is toxic and that exposure media are decisive in whether or not particles or free Cu ions are the main mediators of toxicity. A significant particle effect was only observed in the Good's buffer 3-(N-morpholino) propanesulfonic acid. However, nano-CuO particles especially influenced the dynamics of response early in exposure, between 0 h and 5 h, suggesting that an adaptation to particle stress may occur or that particles modify the bioavailability of the free Cu ions in early exposure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquatic Toxicology - Volume 161, April 2015, Pages 267-275
Journal: Aquatic Toxicology - Volume 161, April 2015, Pages 267-275
نویسندگان
Nadia von Moos, Luca Maillard, Vera I. Slaveykova,