Specific interplanetary conditions for CIR-, Sheath-, and ICME-induced geomagnetic storms obtained by double superposed epoch analysis

The comparison of specific interplanetary conditions for 798 magnetic storms with Dst < -50 nT for the period 1976-2000 was made on the basis of the OMNI archive data.We categorized various large-scale types of solar wind as interplanetary drivers of storms: corotating interaction region (CIR), Sheath, interplanetary CME (ICME) including magnetic cloud (MC) and Ejecta, separately MC and Ejecta, and "Indeterminate" type. The data processing was carried out by the method of double superposed epoch analysis which uses two reference times (onset of storm and the minimum Dst index) and make a re-scaling of main phase of storm a such way that after this transformation all storms have equal durations of main phase in new time reference frame. This method reproduced some well-known results and allowed us to obtain some new results. Specifically, obtained results demonstrate high importance of Sheath in generation of magnetic storms as well as a significant differences in properties of MC and Ejecta and in their geoeffectiveness.Comment: 21 pages, 9 figures, 1 table, submitted to J. of Advances in Space Research on 29 July, 2009 for Special Issue "Space Weather Advances

Experimental investigation of the radial structure of energetic particle driven modes

Alfv\'en eigenmodes (AEs) and energetic particle modes (EPMs) are often excited by energetic particles (EPs) in tokamak plasmas. One of the main open questions concerning EP driven instabilities is the non-linear evolution of the mode structure. The aim of the present paper is to investigate the properties of beta-induced AEs (BAEs) and EP driven geodesic acoustic modes (EGAMs) observed in the ramp-up phase of off-axis NBI heated ASDEX Upgrade (AUG) discharges. This paper focuses on the changes in the mode structure of BAEs/EGAMs during the non-linear chirping phase. Our investigation has shown that in case of the observed down-chirping BAEs the changes in the radial structure are smaller than the uncertainty of our measurement. This behaviour is most probably the consequence of that BAEs are normal modes, thus their radial structure strongly depends on the background plasma parameters rather than on the EP distribution. In the case of rapidly upward chirping EGAMs the analysis consistently shows shrinkage of the mode structure. The proposed explanation is that the resonance in the velocity space moves towards more passing particles which have narrower orbit widths.Comment: submitted to Nuclear Fusio

Assessment of specific toxicity of the complex remedy "Pancreophyt"

The experiments were carried out on white Wistar rats. The probable embryotoxic, teratogenic and fetotoxical influences of the plant remedy "Pancreophyt" at the doses of300 (1/10 DL50) and 600 mg/kg (1/5 DL50) were studied. The findings have shown that all indices of embryo lethality (the number of implantation sites, the number of alive fetus and the number of resorptions) in female white rats treated with the "Pancreophyt" do not differ significantly from the indices of the control group. The mass and craniocaudal dimensions of the fetus in the experimental group corresponded to the indices in the control group. In the second set of experiments the influence of the "Pancreophyt" (300 mg/kg) on the postnatal development of white rat offspring was studied. It was revealed that the death of infant rats was noted only on the 1st day of observation and was 4,7%; the liveweight gain and linear size of infant rats do not differ from the indices of those in the control group

Rhaponticum uniflorum (L.) and Serratula centauroides (L.) are promising ecdysteroid-containing plants

We determined promising sources of phytoecdysteroids - Rhaponticum uniflorum (L.) and Serratula centauroides (L.), growing in the Buryat Republic. Biologically active substances were founded: ecdysteroids, phenolic compounds, polysaccharides, flavonoids, tannins, saponins, vitamins