Comptes rendus de l'Académie bulgare des Sciences

C O N T E N T S

MATHEMATICS

01   Huani Li, Xuanlong Ma, Ruiqin Fu   The Probability that a Subgroup of a Finite Group Is Characteristic

02   Enes Yavuz   Basic Trigonometric Korovkin Approximation for Fuzzy Valued Functions of Two Variables

PHYSICS

03   Todor E. Vlakhov, Georgi B. Hadjichristov, Yordan G. Marinov   Photothermal Effect by Discotic Liquid Crystals Doped with Single-walled Carbon Nanotubes

04   Ivan Grigorov, Chavdar Ghelev, Georgi Kolarov, Mihail Iliev, Boyanka Angelova, Ralitsa Ilieva, Veneta Groudeva, Zara Cherkezova-Zheleva, Dimitur Stoyanov, Ivan Nedkov   LIDAR Monitoring and in situ Sampling of Particulate Matter in Lowest Atmospheric Layers over Urban Area

CHEMISTRY

05   Lidia P. Ivanova, Violeta G. Koleva, Paunka S. Vassileva, Ivalina A. Avramova, Albena K. Detcheva   Study on the Adsorption Mechanism of Copper (II) Ions onto Anethum graveolensL.

06   Reni Andreeva, Dimitar Stoychev   Corrosion Characterisation of the Influence of Phosphate Post-treatment of Chemically Deposited Ceria Protective Conversion Coatings on Aluminium

07   Silviya Abarova, Anelia Zasheva, Rumiana Koynova, Boris Tenchov   Corticosteroid Binding to Blood Plasma Proteins, a Microcalorimetry and Spectroscopy Study

BIOLOGY

08   Katya Georgieva, Veselin Nanev, Ina Aneva, Strahil Berkov, Milena Nikolova   Suppression of Fasciola hepatica Transmission by Galba truncatula Snails with Origanum vulgare Subsp. Hirtum Extract and Essential Oil

09   Rayna Natcheva, Anna Ganeva, Valko Biserkov, Jordan Biserkov   Annual Dynamics of Specks in the Landscape Mosaics from Sentinel-2 in a Mire at the Ecological Edge

10   Ani Georgieva, Katerina Todorova, Ivan Iliev, Valeriya Dilcheva, Ivelin Vladov, Svetlozara Petkova, Reneta Toshkova, Lyudmila Velkova, Ventsislav Atanasov, Aleksander Dolashki, Pavlina Dolashka   In Vitro Antitumour Activity of Hemocyanins Isolated fromHelix aspersaandHelix lucorumin Human Bladder Car cinoma Cells

GEOLOGY

11   Ivan Genov, Atanas Vasilev, Nikola Botoucharov   Unification of the Seismostratigraphic Subdivisions as a Precondition to Clarifying the Recent History of the Black Sea (at the Example of Its South-westernmost part)

GEOPHYSICS

12   Valery Spiridonov, Hristo Chervenkov   A New Criterion for the Stability of the Atmospheric Processes and Its Relationships with NAO

ENGINEERING SCIENCES

13   Plamen Petrov, Ivan Kralov   Adaptive Formation Control of Nonholonomic Mobile Robots for Autonomous Following in front of the Leader

14   Maideen Abdhulkader Jeylani, Ja gannathan Kanakaraj   Development of an Energy Recovery Scheme for Electric Vehicles through Regenerative Braking

MEDICINE

15   Tsvetelina Kostadinova Popova, Liliya Ivanova Ivanova, Ivaylo Georgiev Hristov, Zhivka Stoykova, Tatina Todorova Todorova, Merlin Erol Efraim, Liana Gercheva   Detection of Еpstein‑Barr Virus DNA in Patients with Hodgkin Lymphoma

16   Valentina Ignatova, Lyudmila Todorova, Lyubomir Haralanov   Exogenous Temporal Factors for Stroke Onset

17   Ekaterina Karteva, Neshka Manchorova, Zhelyazko Damyanov, Ognyan Petrov, Stoyan Vladimirov   Crystallite Size of Crown and Root Dentin from Vital and Endodontically Treated Teeth

18   Berna Türk, Zeynep Ökte   In Vitro Comparison of the Effectiveness of Conventional Hand Excavation and Rotary Instrument in Caries Removal in Primary Teeth