Virio- and Bacterioplankton of the Coastal Water of the Moscow River.

The first study on the dynamics of virioplankton abundance (VA) in the coastal waters of the Moscow River in the autumn-winter period at stations differing in the level of anthropogenic impact has been performed. The VA in the waters of the more polluted Dzerzhinsky st. (with a mean of 235.6 ± 71.5 × 106 particles/mL, varying from 167.79 to 397.39 × 106 particles/mL) was higher than in the waters of the less polluted Tushino st. (with a mean value of 129.0 ± 39.6 × 106 particles/mL, varying from 61.01 to 186.85 × 106 particles/mL) throughout the study. Positive correlation was observed (R = 0.6, p < 0.01) between the abundances of virio- and bacterioplankton in the waters of the Dzerzhinsky st. We assume that a significant proportion of the virioplankton of the coastal waters o of the Moscow River is represented by bacteriophages. Three quarters of the differences in the VA dynamics were significantly positively correlated with the content of ammonium and phosphates in the waters at the Dzerzhinsky st. Apparently, an increase in the nutrient load is the main factor responsible for the high VA in the waters of the Moscow River in the autumn-winter period.

Changes in the Quantitative and Functional Characteristics of Bacterioplankton under the Influence of Aqueous Unmodified Fullerene С60 Dispersions.

The effect of aqueous unmodified fullerene C60 dispersions (AFD) at a concentration of 5 mg/L on the total number and metabolic activity of heterotrophic river bacteroplankton was investigated. The stimulating effect of AFD on the number of bacterioplankton and on the activity of electron transport chains in its cells is shown. It is established that, in the presence of AFD, the bactericidal activity of antibiotics decreases. The stimulating effect of fullerene on the natural heterotrophic bacterioplankton, which we discovered, casts doubt on the expediency of using AFD as a bacteriostatic agent.

[Monitoring of the Moskva River Water Using Microbiological Parameters and Chlorophyll a Fluorescence].

The results of investigations of three Moskva River sites with different degree of pollution using a complex of microbiological characteristics and the parameters of chlorophyll a fluorescence are presented. We determined that the bacterioplankton seasonal dynamics at less polluted waters (Tushino and Vorobyovy Gory) were similar and differed significantly from one in more polluted waters (Dzerzhinskii). The number of bacteria with active electron transport chain, as well as their share in the bacterioplankton structure, was higher in the water of Dzerzhinskii (average annual values of 0.23 x 10(6) cells/mL and 14%), that in the less polluted water of Tushino and Vorobyovy Gory (0.14 x 10(6) cells/mL; 6% and 0.15 x 10(6) cells/mL; 7%, respectively). From April to October, the content of chlorophyll a and its photosynthetic activity were the highest in Tushino. In Dzerzhinskii, during spring the increase in photosynthetic activity commenced earlier and was more intensive that the increase in chlorophyll a content, i.e., the increase in phytoplankton biomass was temporarily suppressed. We suggest association of this phenomenon with suppression of organic matter synthesis by phytoplankton due to the high water pollution in Dzerzhinskii. The second autumn peak of chlorophyll a content, that was typical of clear water and was observed in Tushino, did not occur in Dzerzhinskii. We recommend combined application of these microbiological parameters and characteristics of chlorophyll a fluorescence for a monitoring.

[The general physiological mechanisms of glutamate influence on the central nervous system]. / Obshchie fiziologicheskie mekhanizmy vozdeistviia glutamata na tsentral'nuiu nervnuiu sistemu.

The L-Glutamate, is dicarboxilic amino acid which plays the important role in maintenance of normal functioning of the central nervous system (CNS) in invertebrate and vertebrate animals. It carrying out functions of amphibolic intermediate in biosynthesis and degradation of amino acids and some nitrogenous substances. Besides, L-Glutamate acid possesses a significant role in the regulation of the bioenergetics processes that proceeding in nervous system, due to direct or indirect participations in the reactions of glycolysis, gluconeogenesis, synthesis of ketone bodies and formation of glycogen. Also, L-Glutamate accepts direct participation in realization of a citrate cycle reactions, a respiratory circuit; in conversion of ammonia and it excretion from an organism. However the most important function of the L-Glutamate--its participation in the processes of nervous regulation as excitatory neuromediator in the CNS of invertebrate and vertebrate animals.