Comptes rendus de l'Académie bulgare des Sciences

C O N T E N T S

MATHEMATICS

01   Lilia N. Apostolova, Krasimir I. Krastev   Evolution Problems for the Double-Complex Laplacian

02   Nedyalko D. Nenov   Chromatic Number of Graphs and Edge Folkman Numbers

PHYSICS

03   Vasilka Pencheva, Stoyan Penchev, Ivan Nedkov, Tanya Kutzarova, Vassilii Naboko   Analysis of Modulated Optical Reflectance Applied to Magnetoelectric Nanomaterials

04   Stefan Bushev, Ivan Georgiev, Valko Valkov   Analysis of Vertical Axis Centrifugal Casting Technology for Bimetal Castings

CHEMISTRY

05   Albena Detcheva, Ralitsa Georgieva, Elisaveta Ivanova   Spectroscopic Study of the Colouration of Archaeological Glasses Found in Bulgaria

06   Denka V. Kostova, Dimitar R. Mehandjiev   OXY-Complexes of Manganese(VII) with Methyl Violet and Crystal Violet

07   Danka Obreshkova, Lily Peykova   Analytical Study of Sibutramine Using   UV-Spectrophotometry

08   George Angelov, Petko Penchev, Jean-Stéphane Condoret, Séverine Camy   Optimizing the Process of Supercritical Extraction of Lemon Balm ( Melissa Officinalis L.)

BIOLOGY

09   Ekaterina Kozuharova, Andrej Gogala   Reproductive Biology of Gypsophila Trichotoma Wend. (Caryophyllaceae). Endangered Plant Species for the Bulgarian Flora

10   Mariana Hadzhilazova, Jean-Francois Ganghoffer, Ivailo Mladenov   Analytical Description of the Shapes of Beaded Nerve Fibres

11   Teodora Lupanova, Tania Markovska, Diana Petkova, Galya Staneva, Lidia Ivanova, Claude Wolf, Roumen Pankov, Albena Momchilova   Lipid Peroxidation in Control and RAS-Transformed Fibroblasts after Incorporation of Polyunsaturated Fatty Acids

GEOLOGY

12   Ianko Gerdjikov, Anna Lazarova, Eleonora Balkanska, Kamen Bonev, Dian Vangelov, Dimo Dimov, Alexandre Kounov   A New Model for the Pre-Permian Basement of the Central Stara Planina Mountain

13   Christo Pimpirev, Ioannis Beratis   Lithostratigraphy of the Miocene Sedimentary Sequences in Strymon Basin , Northern Greece

GEOPHYSICS

14   Tsvetina Evgenieva, Bo L. B. Wiman, Nikolay Kolev, Evgeni Donev, Danko Ivanov, Ventsislav Danchovski, Doyno Petkov, Vera Grigorieva, Ivan Kolev   Lidar, Ceilometer and Sun Photometer Investigation of the Aerosol Optical Characteristics in the Troposphere over Sofia, Bulgaria

ENGINEERING SCIENCES

15   Lyubka A. Doukovska   Detection Censoring Techniques for Hough Radar Detector Analysis

16   Jordanka Ivanova, Ludowik Weiler, Jeanne Pouquet, Varbinka Valeva, Dietmar Gross, Rod H. Martin   Validation of an Analytical Model for Sliding Wear of Ceramic-Metal Composites with Experimental Data

MEDICINE

17   Rouja Nikolova, Nevena Tzacheva   Regulating Mechanisms and Cardiovascular Response Pattern in Mental and Static Workload

18   Georgi Nikolov, Antoaneta Michova, Jana Kandova, Julia Radenkova-Saeva, Dora Konstantinova   Immunological Changes During Bee Venom Immunotherapy in Patients With Insect Allergy

19   Plamen Kinov, Anna Tzoncheva, Petar Tivchev   Evidence Linking Elevated Oxidative Stress and Aseptic Loosening of HIP Arthroplasty

20   Nikolai E. Lazarov, Dimitrinka Y. Atanasova, Dimitar E. Itzev, Negrin N. Negrev, Galya Ts. Stavreva, Radomir G. Radomirov   Morphological Evidence for Age-Related Changes in the Nadph-d Activity of Myenteric Neurons in the Rat Recto-Anal Region