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Dimitrova L.,NIGGG BAS | Georgieva G.,SU St. Kliment Ohridski | Raykova R.,SU St. Kliment Ohridski | Gurev V.,SU St. Kliment Ohridski | And 3 more authors.
8th Congress of the Balkan Geophysical Society, BGS 2015

The paper presents the assessment of the hardware and software equipment as the initial stage of the implementation of the project DFNI I02/11 "Creating an information base for exploration of seismicity and Earth structure of Livingston Island and surroundings by complex research in the Bulgarian Antarctic Base area". Broad Band seismometer Guralp CMG40T with flat frequency response from 30s to 50Hz and digitizer Reftek DAS130 were installed in the yard of Vitosha Geophysics Observatory (1400m). The equipment was working in extreme weather conditions during February, 2015. The distribution of Power Spectral Density of the ambient noise was estimated and the performance of the tested equipment and the seismological equipment working in the Observatory was compared. Software developed on the base of Golitzynin method and the receiver function techniques were applied over several earthquakes. The assessment of the efficiency of the hardware equipment and the methods applied proved that they are suitable to explore the seismicity of Livingston Island and surroundings. Source

Gluhcheva Y.,Bulgarian Academy of Science | Madzharova M.,Bulgarian Academy of Science | Zhorova R.,SU St. Kliment Ohridski | Atanasov V.,SU St. Kliment Ohridski | And 2 more authors.
Biotechnology and Biotechnological Equipment

Cobalt (Co) and its compounds are shown to improve hematological parameters. Long-term treatment with Co(II) increased hemoglobin content in a dose- and time-dependent manner in mature mice (day 45 to day 90) while it was reduced in immature mice (day 18 to day 30). Higher Hb was measured in samples treated with CoCl2 compared to those treated with Co-EDTA. Plasma Fe concentration was significantly higher in samples treated with Co-EDTA compared to those exposed to CoCl2. Lower concentrations were measured only in mature animals. Co(II) concentration increased but not in a dose-dependent manner. In general more Co(II) was measured in samples treated with CoCl2 possibly due to the stability of the complex Co-EDTA. Surprisingly, mature mice had less Co(II) in their plasma compared to day 18 mice. Strong correlation between plasma Co(II) and iron concentration was found in samples of mice treated with Co-EDTA. Co(II) concentration showed inverse correlation with hemoglobin in mice treated with low dose Co-EDTA. Such relationship was found for day 45 and day 60 mice exposed to high dose CoCl2. Immature mice are more sensitive to Co(II) treatment and show signs of anemia. It has a significant impact on hemoglobin biosynthesis possibly due to its effect on iron metabolism. © 2012 Taylor and Francis Group, LLC. Source

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