Synthesis and Spectral Characteristics of BODIPY Dyes with Two or Three Dipyrrin Domains.

Several boron-dipyrrin (BODIPY) based fluorophores with two and three dipyrrin cores were synthesized and investigated in solvents under the concentration variation. Comparative analysis of spectral and photophysical changes under increasing the number of the cores in the dye molecule was made. Mutual influence of dipyrrin cores was detected leading to the increasing of the compounds rigidity and, thus, the absence of fluorescent molecular rotor effects under the viscosity variation.

[Influence of a variation potential on photosynthesis in pumpkin seedlings (Cucurbita pepo L.)].

The influence of a variation potential on photosynthesis in pumpkin seedlings (Cucurbita pepo L.) was investigated in our work. It was shown that the variation potential induced by cotyledon burning propagates into a leaf.

[Anthropogenic impact on fish parasite fauna in lakes].

Anthropogenic influence on the fish parasite fauna in lakes is studied. Three types of the influence are considered, namely pollution by industrial effluent, anthropogenic eutrophication, and development of aquaculture. Their effects on the fish parasite fauna were found to be different.

[Characteristics of the parasite fauna of the perch Perca fluviatilis L. from the Bolshaya Lindalamba Lake in comparison with other small lakes in Karelia].

Parasite fauna of the perch Perca fluviatilis L. is investigated in the Bolshaya Lindalamba Lake, Republic of Karelia. It is shown, that formation of fish parasite fauna in small lakes depends mainly on the type of the lake ecosystem.