Physiology
In the present research we studied mnemotropic effect of Piyavit® — the biologically active compound of natural origin — on the fear conditioning. Morphological changes in the neocortex and hippocampus of neuron-glia complex and brains’ capillaries under the Piyavit® injection were differently directed. We suggest that improvement of memory under the Piyavit® is associated with metabolic changes in nervous tissue.
The influences of PGP on compound 48/80-induced anaphylactoid reaction development in mice and on histamine secretion from rat peritoneal mast cells (RPMC) were investigated. Anaphylactoid reaction was induced by intraperitoneal injection of compound 48/80 into mice. The amount of histamine secreted by RPMC was evaluated. Injection of PGP 15 min before injection of compound 48/80 led to decrease of mortality, and some of anaphylactoid reaction symptoms reduced. PGP had no effect on compound 48/80-induced histamine secretion from (RPMC) in vitro.
Genetics
Analysis of allozyme variability in brown trout from Vorob’ev river was carry out. We studied 17 gene loci coding enzymes: glycerol-3-phosphate dehydrogenase (G3PDH ); aspartate aminotrans- ferase (AAT ); malate dehydrogenase (MDH ); lactate dehydrogenase (LDH ); superoxide dismutase (SOD ); esterase D (EST-D ). Significant differences between the sampes of brown trout catching in 1981—1982 and/or 1992—1995 were determined by loci: AAT-1,2*, G3PDH-2,3*, LDH-5*, MDH-2*. We should suppose that allele frequency changing by the time in brown trout from Vorob’ev river were bound up with genetic drift.
Ecology
We have researched a new method of collecting insects, which are associated with Fungi. We used modified window traps — the traps of Kaila. We elaborated criteria of detection fungiinsect interactions. We analised the kind of interactions between Staphylinidae and Fungi. Data on suitability of the trap for monitoring of micetobiont insects and selectivity of the trap are received. We gave some recommendations for using this trap.
The classification of spring macrozoobenthos assemblages is carried out on original data. The five types of assemblages is revealed: Potamophylax nigricornis — Baetis rhodani — Cne- tha spp. — Nemouridae; Rhyacophila fasciata; Stenophylax lateralis — Euglesidae — Ptychopte- ra spp.; Asellus aquaticus; Apatania auricula. The differentiation factors of these assemblages are water flow, water velocity which are independent conditions and substrate type. Comparison with other classification modes is done.
EDITORIAL
Mycology and Algology
The salt tolerance of two representatives of genus Spirulina (Arthrospira) Spirulina platensis and Spirulina maxima has been investigated. They both are the widespread objects of photobio- technology and it has been shown that the content of 5—15% sea-water in medium has not caused the decreasing of biomass more than by 15—20% as compared with control. The further decreasing of biomass was proportionate to sea-water content in medium. The investigation of reactivity of na- tive (intravital) exometabolites secreted into cultural medium has showed that the sea-water content influenced the oxidative reactivity of exometabolites. The hour’s rhythmics of oxidative reactivity alteration has showed the distinguishes between examined cultures.
Dates
M.V. Lomonosov MSU, Biological faculty, January 27—29, 2011