Comptes rendus de l'Académie bulgare des Sciences

C O N T E N T S

Volume 63, Issue No4, 2010

ASTRONOMY

01   Peter I. Y. Velinov, Dimitar Yuskolov   Application of  Generalized Titius-Bode Law for Satellites in the System of Uranus

471

MATHEMATICS

02   Alexander Arhangel'skii   Weak Neighbourhoods

481

03   Krassimir Milanov, Leoneed Kirilov   Necessary Condition for  Optimal Portfolio Problem

487

PHYSICS

04   Janez Ivan Pavlič, Julia Genova, Antonia Zheliaskova, Aleš Iglič, Marin D. Mitov   Electroformation of Neutral and Negatively Charged Phospholipid Giant Vesicles under Physiological Conditions

497

CHEMISTRY

05   Antoaneta Trendafilova, Sanduin Shatar, Milka Todorova, Shataryn Altantsetseg   Essential Oil Composition of Four Mongolian Artemisia Species

503

06   Murad Al Afoori, Nadezhda Tabakova, Venko Beschkov   Treatment of Water Contaminated with Heavy Metals and Oil by Polymer De-Emulsifiers

511

BIOLOGY

07   Nadejda Bocheva, Miroslava Stefanova   Factors Limiting the Integration of Motion Direction Information

519

08   Elka Popova, Petia Kupenova   Contribution of Voltage-Gated Sodium Channels to b- and d-wave of Frog Electroretinogram

527

09   Stiliyan Georgiev, Dolja Philipova, Christina Christova, Ivanka Ivanova   EEG Alpha Frequency Shift between Stable and Neurotic Personality after Auditory Stimuli Presentation

535

10   Teodora Lupanova, Lidia Ivanova, Galya Staneva, Tania Markovska, Diana Petkova, Roumen Pankov, Albena Momchilova   Plasma Membrane Phospholipase A2 Substrate Specificity Is Altered by Cell Cuturing in Three-dimensional Environment

543

GEOLOGY

11   Valentina Doncheva   Nutrients in Pore Water from Surface Sediment Layer along the Eutrophication Gradient (Varna Lake – Varna Bay Case Study)

547

12   Stefan Todorov, Anna Damianova, Anton Antonov, Lidia Todorova   Investigations of Natural Waters' Spectra from the Lakes of Rila Mountain National Park

555

PHYSICAL GEOGRAPHY

13   Giorgio Anfuso, Josée Ángel Martinez del Pozo, Driss Nachite   Coastal Vulner­ability in the Mediterranean Sector between Fnideq and M'Diq (North of Morocco)

561

GEOPHYSICS

14   Lubomir Alexandrov, Alexander Mishev, Peter I. Y. Velinov   Parameterisation of Ionization Yield Function Y Produced by Cosmic Ray Nuclei in the Atmosphere

571

SPACE RESEARCH

15   Atanas Atanassov   Dark Image Correction of Spectrograms Produced by SATI Instrument

583

16   Lachezar Mateev   Simulation of Ionization Profiles of Cosmic Rays in the Middle Atmosphere during Moderate Solar Activity

593

ENGINEERING SCIENCES

17   Juš Kocijan, Alexandra Grancharova   Gaussian Process Modelling Case Study with Multiple Outputs

601

18   Chavdar Roumenin, Svetoslav Noykov, Siya Lozanova   Three-Contact Parallel-Field Hall Microsensor with Dynamically Reduced Offset and  1/f Noise

609

MEDICINE

19   Roman Tashev, Maria Ivanova, Todor Toromanov, Miroslav Marinov, Stiliana Belcheva, Iren Belcheva   Olfactory Bulbectomy Impairs Active and Passive Avoidance Learning in Rats

617

20   Juliana Dushanova, Dolja Philipova, Gloria Nikolova   Alpha Frequency Changes in Parkinsonian Patients

623