2010 Issue №7

The microbiological activity is a principal factor of metallic and nonmetallic material damage. Mould fungi, as metal destroying microorganisms, are of particular interest in this connection. The Phialophora fastigiata mould fungi are studied as mild steel corrosion promoters. The authors show the biocidal and inhibitory role of a number of organic substances in steel corrosion under the influence of deuteromycetes Phialophora fastigiata. The protective effect observed in the best organic compounds reaches 70-90 %.

The article considered the reproductive biology and life cycle of mysids inhabiting the Kaliningrad maritime canal. The author offers a comparative analysis of seasonal changes in gamic structure, the accretion and fertility of mysids.

Comparative research on spectral dependence between the appearance of shadow defensive reflex in intact and eyeless adults of Lymnaea stagnalis proved the excitatory role of dermal photoreception and the inhibitory role of the ocular one. The shape of the curve and the modified spectral maximum of the absorption of dermal light-sensitive pigment (490 nanometers) allow the authors to suppose the presence of rhodopsin-like pigment in dermal photoreceptors.

This article considers the species composition of the opportunistic pathogenic microbial flora and offers a correlation analysis of the seasonal dynamics of the gram-negative microflora in the European eel (Anguilla anguilla L.) and the water and soil of the Russian part of the Vistula Lagoon. The authors determine the epizootic bacteria species pathogenic for the eel. The seasonal dynamics of species diversity of bacteria in the eel's microflora helps to determine how bacteria penetrate the organism of the eel (in spring) and are forced into external environment (in autumn) and to prove the existence of microflora “depot-organs” in the organism of the fish.