Comptes rendus de l'Académie bulgare des Sciences

C O N T E N T S

MATHEMATICS

01   Ayşegül Erençin, Gülen Başscanbaz-Tunca   Approximation Properties of a Class of Linear Positive Operators in Weighted Spaces

02   Ollivier Hyrien, Nikolay M. Yanev   Modeling Cell Kinetics Using Branching Processes with Nonhomogeneous Poisson Immigration

PHYSICS

03   Zlatinka Dimitrova, Daniela Gogova   Investigation of Differences in Optical Phonons Modes by Principal Component Analysis

04   Elena Nikolova, Valko Petrov   Quasi-Steady-State Dynamics of the Protein Translation Repressed by microRNA

CHEMISTRY

05   Dragomir Dinchev, Ljuba Evstatieva, Stefan Platikanov, Bertalan Galambosi   Investigation of Perspective Origins of Tribulus terrestris L. for Cultivation

06   Ljubomir Nikolov, Elena Mileva   Model Study on Emulsion Systems with High Interfacial Mobility

07   Ljubomir Nikolov, Elena Mileva, Khristo Khristov   Influence of the Foam Film Type on Foam Drainage Process. A Simple Theoretical Model

BIOLOGY

08   Dimitrina Spasova, Anna Sotirova, Tatyana Avramova, Danka Galabova   Effect of Rhamnolipid-Biosurfactant on the Ultrastructure of Pseudomonas aeruginosa

09   Anton Hinkov, Vasil Atanasov, Sevdalina Raleva, Radka Argirova   Modified Rapid Screening Method for Evaluation of HIV-1 Protease Inhibitors

10   Julieta Dineva, Ivailo Vangelov, Radoslav Abrashev, Diana Gulenova, Gueorgui Nikolov, Maria Angelova, Maria Ivanova   Survival Role of Intracellular Superoxide Dismutases SODs and Catalase for Human Granulosa Luteinized Cells. A Preliminary Study

11   Roumyana Detcheva, Tamara Pajpanova, Konstantin Grancharov   Cytotoxic Effect of Hsp90 Inhibitor Radicicol in Combination with Cisplatin, Doxorubicin, Etoposide and 5-Fluoro-2’-Deoxyuridine on F4N Cells

12   Tsvetelina Oreshkova, Elena Stoyanova, Milena Mourdjeva, Stanimir Kyurkchiev   Human Adipose Tissue-Derived Mesenchymal Stem Cells Support the Growth and Plasticity of Human Embryonic Stem Cells (Bg01V Cell Line)

GEOLOGY

13   Eleonora Balkanska, Ianko Gerdjikov   New Data on the Structure of Botev Vrah Thrust Along the Southern Foot of Central Stara Planina Mountain

14   Kalinka Markova, Maya Stefanova, Marin Ivanov, Sevdalina Valćeva, Stefan Marinov, Christo Pimpirev, Denitsa Apostolova   Geochemical Characterization of Organic Matter from the Sally Rocks Section and from the Rocks of the Basement of the Bulgarian Antarctic Base 1 Section (Miers Bluff Formation), Livingston Island, Antarctica

15   Platon Tchoumatchenco, Dragoman Rabrenović, Vladan Radulović, Nenad Malesević   Trans-Border (East Serbia/West Bulgaria) Early-Middle Jurassic (Hettangian-Early Callovian) Palaeogeographical Correlations

PHYSICAL GEOGRAPHY

16   Marinela Agalareva   Sructural Geomorphological Features of the Osam-Yantra Block Step

GEOPHYSICS

17   Yordan Tassev, Simeon Assenovski, Evgeni Donev, Danko Ivanov, Ventsislav Danchovski   Comparative Analysis of Ground Level Ozone Distribution in Sofia and Plana Mountain During 2007–2009

SPACE RESEARCH

18   Jordanka Semkova, Rositza Koleva   Overview on Radiation Quantities Observed by Liulin-5 Instrument in a Human Phantom on the International Space Station during the Minimum of the 23^rd Solar Cycle