Comptes rendus de l'Académie bulgare des Sciences

C O N T E N T S

Volume 63, Issue No2, 2010

MATHEMATICS

01   Thomas Honold, Michael Kiermaier, Ivan Landjev   New Arcs of Maximal Size in Projective Hjelmslev Planes of Order Nine

171

02   Hatice Gül Ince, Özlem Girgin Atlihan   On Summability and Approximating Operators

181

03   Vladimir V. Monov   Inequalities Involving Eigenvalues and Diagonal Entries of a Nonnegative Matrix

189

04   Miomir S. Stanković, Predrag M. Rajković, Sladjana D. Marinković   On the Fractional q-Derivative of Caputo Type

197

PHYSICS

05   Borislava Katerska, Ernesto Perez, Ginka Exner, Manya Krasteva   Molecular Weight  Effect on the Crystallization in Polymer Liquid Crystals

205

06   Nikolai Miloshev, Georgi Miloshev   Effect of Small Particle Sizes on the Equilibrium Crystal Shape and the Work of Nucleus Formation

211

CHEMISTRY

07   Antoaneta Ivanova, Gergana Todorova-Nikolova, Irina Lazarova, Helga Engi, Joseph Molnar   Modulation of Multidrug Resistance by Selected Edible Plants –Asphodeline lutea and Allium ursinum

221

08   Jordanka Staneva, Sanduin Shatar, Milka Todorova, Shataryn Altantsetseg   Lactone Profile of Brachanthemum gobicum Krasch. From Mongolian Gobi

225

09   Christian Girginov, Alexander Zahariev, Ivan Kanazirski   Anion Incorporation within Porous Anodic Alumina Films Formed in Aqueous Sulfamic Acid

229

BIOLOGY

10   Georgi Petkov, Roumena Kambourova, Vassya Bankova   Extracellular Substances of Total Bacterial Flora from Cultures of the Green Alga Scenedesmus

235

11   Milena Nikolova, Neno Pondev, Lilia Christova, Wermer Wolf, Andon Kossev   Effect of Subthreshold  Transcranial Magnetic Stimulation on Reaction Time

241

12   Ekaterina Stoynova-Bakalova, Peter Petrov   Effects of Chemically Differing Cytokinins on Zucchini Cotyledon Growth in Presence of Copper in Excess

249

13   Ekaterina Nikolova, Yves Poumay, Vanio Mitev   Identification of HB-EGF – Rac1 –  c-Myc Signalling Pathway in Growing Human Keratinocytes

257

14   Tzvetana Daskalova   Cytoembryology of Lamium bifidum Cyr.

265

15   Plamen Kalushkov, Oldřich Nedvěd   Suitability of Food Plants Oxycarenus lavaterae (Heteroptera: Lygaeidae), a Mediterranean Bug Invasive in Central and South-East Europe

271

16   Tsvetelina Gerasimova, Margarita Topashka-Ancheva   Experimental Data for Chromosome Fragility in Small Mammal Species (Rodentia, Mammalia)

277

GEOLOGY

17   Platon Tchoumatchenko, Dimiter Tronkov   Lithostratigraphic Units of Tethyan Type of East Stara Planina Mts and Strandzha Mt. (Veleka Unit), South-East Bulgaria. Correlation Essay

285

GEOPHYSICS

18   Liliana Iordanova   Local and Advective Characteristics of the Precipitations’ Chemical Composition in Sofia, Bulgaria

295

MEDICINE

19   Irina Marinova, Georgy Nikolov, Antoaneta Michova, Rossitza Kurdova   Study of Serum Specific IgE in Patients with Cystic Echinococcosis

303

20   Valentina Ormandzhieva, Emilia Petrova   Morphometrical and Ultrastructural Study of the Choroid Plexus in Young and Adult Rats

311