In the present research we studied mnemotropic effect of Derinat — the biologically active compound of natural origin — on the passiv avoidance conditioned reflex and active avoidance conditioned reflex. Derinat accelerates the development of the conditioned reflexes. The effect was observed in early stages of the experiments, similarly to the influence of nootropic drugs.

Chromatin is designed to tightly package DNA into the eukaryotic nucleus while maintaining its proper functioning. This review describes the mechanisms by which RNA polymerase III transcribes through the chromatin templates. This mechanism is characteristic of eukaryotic Pol III, bacteriophage RNA polymerases, and probably ATP-dependent chromatin remodeling complexes. In this case, nucleosomes are translocated without release of the octamer into solution.

It present electronic microscopy (EM) of analysis of synaptonemal complexes (SC) spermatocytes of ale silver fox Vulpes fulvus at the pachytene stage. It was carried out karyotypeing and discribe of SC-karyotypes of pachytene cells. The knowledge of normal SC-karyotypa it need for recognize revealed synaptic abnormalities of sex chromosomes and autosomes in pachytene. It was showed that electronic microscopy (EM) of analysis of synaptonemal complexes (SC) spermatocytes — it was very good tool for studying cause of distortion fertility of carriers anomalyes for further investigations of foxes

Life history and acoustic signalling of central-asian species Deracantha onos (Pall.) are described. Males and females produce calling songs and disturbance sounds. For the first time electronograms of stridulatory files, oscillograms and spectrograms of the female songs are given.

Comparative analysis of flight apparatus and flight characteristics in representatives of 5 dipterous families (Bombyliidae, Syrphidae, Scatophagidae, Calliphoridae and Sarcophagidae) is carried out. Data on flight velocity, aerodynamic force, wing-beat frequency, stroke amplitude and stroke plane angle, wing area, body mass and body volume are received. Relations between these parameters are analyzed. Features upon which species of the same genus, representatives of different genera in one family and different families separates are determined.

Fresh and taken from herbarium thalli of epigeous lichens Cladonia stellaris, C. rangiferina, Allocatraria nivalis, A. cucullata, Cetraria islandica, Peltigera canina, Nephroma arcticum were studied by indirect enzyme-linked immunosorbent assay (ELISA). There were found no significant differences in the content of secondary metabolites belonging  o mycotoxins deoxynivalenol, diaceto- xyscirpenol, zearalenone, alternariol, citrinin, sterigmatocystin, cyclopiazonic acid, mycophenolic
acid, emodin, PR-toxin. Revealing of these substances in specimens kept in herbarium for some decades testify to an effective system of conservation of metabolic products in lichens.

The response of phytoplankton fluorescence and biomass to addition of different nitrogen sources and irradiance were assayed in enriched bottle experiments with the White Sea phytoplank ton in August—September 2007. Phytoplankton was exposed in situ 18 days with the additions of 180 mM/L of nitrogen as nitrate, urea, ammonium and glycine under two levels of irradiance. The maximum quantum efficiency of PSII (Fv/Fm) was determined in the dark-acclimated algae. Rapid light curves (RLC) were constructed based on 8 actinic increasing light levels. The maximal relative electron transport rate (rETRmax), the maximum light use coefficient (a), and the non-photochemical quenching (NPQ) were calculated. After enrichment abundance of phytoplankton increased, and the photosynthetic parameters changed. The maximum quantum efficiency of PSII increased to 0,64—0,71, indicating a good physiological state of algae and a lack of stress due to nutrient limitation. The dynamic of rETRmax and NPQ depended on nitrogen source and growth irradiances while a did not depended on nitrogen form.

Electromagnetic radiation of low intensity (n = 42,25 GHz) changes integrated toxicity of the sewage water of different degree of treating. It is shown that the less degree of water treating the more toxic effect of ER. It was revealed by express method on basis of a bacterial luminescence of the test system “Ecolum-08” that allows to offer this test system for a primary estimate of the ER action.

The spatial structure of soil Collembola populations in samples of the different sizes (100, 36, 12 and 3 sm2) in the uppermost of the soil of pine wood has been considered. The research has revealed “the effective size” samples (12 sm2) for an appropriate assessment of number and characteristics of Collembola spatial distribution, and also necessary quantity of samples for the accounting results to be representative.

Feather grasses of Stipa dasyphylla group always were a problem group for taxonomy. In this research we performed a critical analysis of diagnostic characters are used nowadays, and attempted to find new morphological characters which could make a discrimination of species of the group easier. We have shown a necessity of Stipa ucrainica and S. zalesskii distinguishing and also a distance of not-reaching a base of awn by ventral line of hairs on lemmas was non-effective character.