биотестирование

Estimation of the Toxicity of a Metal/Carbon Nanocomposite of Copper by Biotesting

The toxic effect of a metal/carbon copper nanocomposite (Me/C Cu NC) on higher plant seeds and the bacterial sensor “Ecolum-8” was evaluated. A significant inhibitory effect of 0.1% nanomaterial on the seedlings of radish seeds was established. Some stimulating effect on the development of the roots of this culture was found at a concen-tration of 1 • 10–8%, but it was insignificant (by 11.3%).

POLLUTION ASSESSMENT OF THE AQUATIC ENVIRONMENT WITH THE USE OF DIALYSIS CYANOBACTERIA CULTURES

An approach to allow monitoring contamination of watercourses by registering changes in the space-time parameters of cells and their external structures by ATR-IR spectroscopy with the use of dialysis cultures of Synechococсus sp. PCC 6301 is offered.

SOIL STATUS ASSESSMENT IN URBAN AREAS BY CHEMICAL AND ENVIRONMENTAL TOXICOLOGICAL METHODS

The ecological status of soils in an urbosystem was assessed in terms of the total content of heavy metals, their mobile forms, petroleum products, integrated toxicity, and soil catalase activity. Parts of the functional transport areas of the city have turned out to be the most disadvantaged areas. A tendency of suppression of the ciliate motor activity and the growth indicators of watercress, reduction of the catalase activity in urban soils are observed.

COPPER ION BIOAVAILABILITY IN WATERS OF VARIOUS ORIGIN

The toxic effect of copper ions upon a test culture of alga chlorella in natural (the Yenisei and Kacha rivers), waste and tap water (the Krasnoyarsk city) was estimated. It has been found that the copper toxicity in samples of these waters can greatly reduce. This toxicity reduction, which differed highly in the samples examined, could be caused by binding of potential toxic substances by some compounds in the waters. In natural water, the binding capacity and bioavailability of toxicants vary through seasons.