Laboratory test system for the evaluation of nanomaterial toxicity on Dunaliella salina microalgae

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• 作者：V. A. Bogatyrev ; A. A. Golubev ; N. Yu. Selivanov…
• 刊名：Nanotechnologies in Russia
• 出版年：2015
• 出版时间：January 2015
• 年：2015
• 卷：10
• 期：1-2
• 页码：109-119
• 全文大小：1,173 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Nanotechnology
  Industrial and Production Engineering
  Manufacturing, Machines and Tools
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1995-0799

文摘

We are reporting a new diagnostic test system for evaluating nanomaterial toxicity on halophile green microalgae Dunaliella salina based on colorimetric measurements enabling us to estimate cell death and growth-rate inhibition in microalgae suspension for serial dilutions of several toxicants. The principle of the method is the photodegradation of chlorophyll from damaged cells, resulting in the discoloration of the cell suspension, which enables us to estimate the microalgae population viability. The cell response was studied for two standard pollutants: formaldehyde and hydrogen peroxide. The toxic effect of free CTAB (cetyltrimetilammonium bromide, cationic detergent) water solution was compared with the effect of gold nanoparticles: nanorods, nanostars, and nanospheres, all synthesized in CTAB solutions. It was shown that toxicity is mainly caused by free (nonabsorbed on nanoparticles) surfactant molecules. The toxicity on microalgae D. salina decreases in the following order of silver-containing compounds: silver nitrate > silver proteinate ?colloidal silver in same order.