Comptes rendus de l'Académie bulgare des Sciences

C O N T E N T S

MATHEMATICS

01   Vladimir A. Konoplev, Alexander Cheremensky   On Kinematics of Multibody Systems

02   Vladimir Monov   On the Properties of Two Matrix Products Arising in Stability Theory

03   Mihail Konstantinov, Petko Petkov, Ivan Popchev, Vera Angelova   Perturbation Bounds for the Matrix Equation

PHYSICS

04   Ilia Penev, Jordan Stamenov, Miroluba Drenska, Hristo Angelov, Stefan Georgiev, Ivo Kalapov, Nikolay Uzunov, Nina Arhangelova, Hristo Hristov   Origin and Behaviour of ⁷Be in the Air Masses in the Vicinity of Moussala Peak

05   George Kamberov, Lilia Popova   Mass Hierarchy of Hadrons

CHEMISTRY

06   Stanislav G. Bayryamov, Nikolay G. Vassilev, Dimiter D. Petkov   Effective Orthogonal Protection of L-ornithine as Amino Acyl Component for Amino Acylation of 5’-O-Pivaloyl Nucleosides. Synthesis of Bz(NO₂)-Orn(Boc)-OCH₂CN by the Orthoformate Strategy

07   Georgy Momekov, Ivanka Pencheva, Boyka Tsvetkova, Plamen Peikov   Cytotoxicity Activities and Chemical Stability of Amides of 1-benzhydrylpiperazine

BIOLOGY

08   Vessela Balabanova, Antonina Vitkova   Peculiarities in Ontogenesis of Arnica Montana L. in Bulgaria

09   Anna Sotirova, Tatyana Avramova, Irina Lazarkevich, Vera Lubenets, Elena Karpenko, Danka Galabova   Antimicrobial Potential of Selected Thiosulfonates-based Biocides and Biosurfactants against Bacteria and Fungi

10   Aglika Edreva, Irina Pouneva, Emilia Gesheva   Biphasic Burst of Hydrogen Peroxide in UV-B Irradiated Green Alga Chlorella Vulgaris

11   Ralitza Damianova, Teodora Lupanova, Diana Petkova, Tania Markovska, Lidia Ivanova, Galya Staneva, Claude Wolf, Roumen Pankov, Albena Momchilova   Oxidative Stress-Induced Alterations in Fibroblast Plasma Membrane Lipids

12   Alexandre Chikalanov, Mariyana Lyubenova, Stoyan Stoyanov   Classification Oriented Databases for Facilitating Plant and Terrestrial Modelling

GEOLOGY

13   Radostina Atanassova   Environmental Significance of Pyrite with Colloform Textures

ENGINEERING SCIENCES

14   Snezhana Kostova   Maximization of Stability Radii of PLDS by Linear Feedback in Case of Monomial Control Matrix and Existence of Zero Solution

15   Svetoslav Savov, Ivan Popchev   On Positive Definite Uncertain Matrix Polynomials. Generalized Exact Conditions

16   Svetla Vassileva, Vyara Gantcheva, Bonka Tzvetkova   Inferential Measurements of Gibberellin by Predictive Software Analyzers

MEDICINE

17   Rouja Nikolova, Nevena Tzacheva   Functional Significance of Autonomic Control for Genesis of Diseases Associated with Dysfunction of the Autonomic Nervous System

18   Nikolay Kalvatchev, Iva Christova, Evgenia Taseva, Liliana Nestorova   Detection of Dobrava Hantavirus in a Bulgarian Patient with Severe Haemorrhagic Fever with Renal Syndrome by SYBR Green Real Time RT-PCR

19   Katerina Simeonova, Ivan Lambev, Lubomir Kasakov, Mila Vlaskovska   Involvement of Nitric Oxide in the Tolerance to Opioid Cardiovascular Effects

AGRICULTURAL SCIENCES

20   Tomo Milosevic, Nebojsa Milosevic   Rooting Response and Root Development in the Thornless Blackberry (Rubus Spp.) Cv. "Cacanska Bestrna" Propagated by Tip Layering. Main Cane