MATHEMATICS
P. Babilua, I. Bokuchava, B. Dochviri, M. Shashiashvili
Optimal Stopping on a Finite Time Interval of a Markov Sequence with Regard for the Cost of Observation
Presented by Corr. Member of the Academy E. Nadaraya, January 10, 2006
ABSTRACT. Problem of optimal stopping of a homogeneous Markov random sequence is studied in the presence of a certain sequence observation payoff. A regular excessive characterization of payoffs is obtained and the forms of e-optimal and optimal stopping times are found. The case of a time-dependent gain function is also studied. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Markov sequence, optimal stopping, stopping time, excessive function, gain function, payoff.
MATHEMATICS
G. Oniani
On the Integral Properties of the Strong Maximal Operator
Presented by Member of the Academy L.Zhizhiashvili, February 25, 2006
ABSTRACT. From the results announced in the paper it follows that: 1) for
every measurable function f on 
there exists a
measure preserving and invertible mapping 
such that the
distributions of strong maximal functions of 
corresponding
to arbitrary orientations of orthogonal coordinate axes are uniformly
estimated from above by the distribution of the Hardy–Littlewood maximal
function of ; 2) the
distribution of a strong maximal function of arbitrary 
is either finite everywhere or infinite everywhere. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: strong maximal operator, Hardy–Littlewood maximal operator, Zygmund space.
MATHEMATICS
N. Macharashvili
On Summability of Fourier-Laplace Series
Presented by Member of the Academy L.Zhizhiashvili, Fabruary 7, 2006
ABSTRACT. In the present work a notion of generalized Laplace operators on the sphere is introduced. Sufficient conditions (C,a) of the summability of differentiated Fourier-Laplace series are proved. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Fourier-Laplace series, summability, generalized Laplacians, Cesaro means.
Mathematics
G. Lomidze, P. Tsereteli, Z. Sukhiashvili, R. Kvaratskhelia, R. Jobava
Application of FEM/MoM Approach for Investigation of Vehicle Glass Antennas
Presented by Corr. Member of the Academy E. Nadaraya February 24, 2006
Abstract. Investigations of vehicle glass antenna are the important part of EMC simulations in automotive industry. Hybrid FEM/MoM approach can be considered as one of the ways of direct solution. MoM techniques are very efficient for solving open radiation problems with long thin wires and conducting surfaces. FEM is very well suited for modeling inhomogeneous dielectric bodies. Thus, the conjugation of the MoM with the FEM exploits the benefits from both methods. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: vehicle glass antenna, hybrid Fem/MoM approach, PCB.
MATHEMATICS
T. Bokelavadze
The Lattices in Connection with W-Power Groups
Presented by Member of the Academy H. Inassaridze, March 21, 2006
ABSTRACT. In the present paper we study the subgroup and coset lattices of W-power groups with some restrictions. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: modular and distributive lattices, W-power group.
MATHEMATICS
T. Kemoklidze
On the Characterization of Torsion-Complete Groups
Presented by Member of the Academy H. Inassaridze, March 28, 2006
ABSTRACT. The paper deals with issues related to the theory of Abelian groups. A torsion-complete group is characterized in terms of the extendability of an endomorphism of a basic subgroup to an endomorphism of the group. It is proved that an endomorphism of an arbitrary basic subgroup of the reduced p-group A is extendable to an endomorphism of the group if and only if A is a torsion-complete group. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Torsion-complete group, basic subgroup, endomorhism of the group.
MATHEMATICS
T. Jangveladze, M. Aptsiauri
The Asymptotic Behavior of Solutions and Finite Difference Scheme for One Nonlinear Integro-Differential Equation
Presented by Corr. Member of the Academy R. Bantsuri, April 4, 2006
Abstract. The large time asymptotic behavior of solutions for one nonlinear integro-differential equation is studied. The rates of convergence are given. Corresponding finite difference scheme is given too. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: nonlinear integro-differential equation, asymptotic behavior, finite difference scheme.
Mathematics
V. Jaoshvili, O. Purtukhia
Stochastic Integral Representation of Functionals of Poisson Processes II
Presented by Corr. Member of the Academy E.Nadaraya, March 21 , 2006
ABSTRACT. The paper suggests the method which allows us to construct explicit expression for integrands that take part in the stochastic integral representation of functionals of Poisson processes. For those functionals formulae for calculation of the predictable projection of their Malliavin derivatives are given. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Poisson process, polynomial of Poisson-Sharle, Malliavin derivative, predictable projection.
Mathematics
I. Pochkhua
On the Second-Order Differential of the
Vallee-Poussin Integral
on the Sphere
Presented by Member of the Academy L.Zhizhiashvili, February 7, 2006
ABSTRACT. Notions of a Laplace operator and a generalized Laplace operator of the first and second orders are introduced. By means of the Laplacians, sufficient conditions of convergence of the integral of the differ entiated two times Vallee-poussin integral are proved. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Vallee-Poussin singular integral, Laplace operator, generalized Laplace operator.
Mathematics
N. Rokva
Regular Elements of Semigroup BX(D) Defined by X-Semilattices of S3(X,6) Class
Presented by Member of the Academy H. Inassaridze, March 30, 2006
ABSTRACT. Regular elements of one class of complete semigroups of binary relations are studied in the work. Formulae for calculation of a number of regular elements of the considered semigroups are reduced in case when X is final set. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: semigroups, regular elements.
MATHEMATICS
M. Nebieridze
On the Inversion of the Wandermond Matrix
Presented by Corr. Member of the Academy R. Bantsuri, March 14, 2006
Abstract. For solving one of the Lanczos problems we often use the systems of equations with the Wandermond matrices. There are some algorithms inversions of this matrix. We propose one more original algorithm of Wandermond matrix’s inversion. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Wandermond determinant, inversion, Lanczos.
Mechanics
S. Egutidze M. Shilakadze T. Kvitsiani
Methodology of Calculation of Optional Parameters for Damping Knots of Mine Clearing Equipments
Presented by Member of the Academy R. Adamia, March 28, 2006
Abstract. In this article we have defined the main directions of calculation of necessary parameters of damping node in small-sized minesweeper machines. Namely, the method of definition of one of its parameters – angular velocity w caused by mine explosion is offered, which is based on the theorem of kinetic momentum of the system in the case of impact. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: antipersonnel mines, damping knots, moment of inertia, angular velocity.
THEORY OF ELASTICITY
R. Berekashvili
On One Method of the Solution of a Generalized Biharmonic Equation for an Elliptic Domain
Presented by Corr.Member of the Academy R.Bantsuri, May 16, 2006
ABSTRACT. Evident solution of generalized biharmonic problem in case of elliptic section when the function in the right side are the third order polynoms is given. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: biharmonic equation, third order polynom.
CYBERNETICS
A. Oganezov
Flat Figures Recognition Based on Dactyloscopy Signs Methods for Artificial Neural Nets
Presented by Member of Academy V. Chavchanidze, June 6, 2006
ABSTRACT. The author considers practical implementation of Optical Characters Recognition (OCR) model by using Artificial Neural Networks (ANNs), different matrix types and probability/statistics method for data analysis. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Artificial Neural Networks (ANNs), Optical Characters Recognition (OCR), v/h zonds, fingerprinting signs.
Cybernetics
M. Tsintsadze
On Optimal Fuzzy Numbers
Presented by Member of the Academy V. Chavchanidze, May 8, 2006
Abstract. Generally fuzzy subsets are built on the basis of an expert’s estimation of one of the complemented components. From this point of view thus constructed four fuzzy subsets optimally characterize an information unit. A membership function of the information unit on the basis of new concept, canonically conjugated fuzzy subsets has been constructed. Thus it is possible to take into account information optimally. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: fuzzy sets, optimal membership functions, fuzzy numbers.
Informatics
J. Antidze, N. Gulua
On One Approach to Automatized Semantic Analysis of Phrases of a Natural Language
Presented by Corr. Member of the Academy A.Prangishvili, February 28, 2006
ABSTRACT. The present work describes an approach for developing an algorithm for automatic semantic analysis of phrases, preparing a relevant knowledge base and use of our instrumental means for realizing the algorithm by computer. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: semantic analysis, micro-cosmos, micro-theory, software tool, knowledge base, deduction, semantic graphs.
PHYSICS
T. Khachidze, T. Nadareishvili
Dirac Equation and its Squared Form
Presented by Corr.Member of the Academy A.Khelashvili, May 30, 2006
ABSTRACT. It is shown that the squared operation of the Dirac equation which is widely applied may create new solutions and moreover may change the inner nature of original equation. Some illustrating examples are considered as well. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Dirac equation, squared equation, Hamiltonian.
PHYSICS
M. Namtalishvili, Member of the Academy T.
Sanadze, N. Basharuli, P. Magalashvili,
A. Mikaberidze, Z. Razmadze, M. Gabeskiria
Growth of Ce-Doped LSO Single Crystals by
Stockbarger-Bridgman Modified Crystallization Method
Presented May 8, 2006
ABSTRACT. The modified Stockbarger-Bridgman method was suggested for the growth of optically perfect LSO:Ce single crystals. Our investigations have shown that the most perfect crystals are grown by the horizontally directed crystallization. In this case the elements of directional crystallization are combined with the zone melting. Crystallization is carried out in the conditions of sufficiently developed mirror of melting. As a result in this case the chemical purity of grown crystals increases. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: crystallization, melt, admixture, scintillator, tungsten-molibdenum, detector, crystallographic, policrystal, single crystal, stress,
Physics
E. Khalvashi, M. Chkhartishvili, G. Kakhiani
Angular Dependence of Relaxation Times and Line Shape of Electron Paramagnetic Resonance in Kmf3 and CuX42- Compounds
Presented by Member of the Academy T. Sanadze, June 13, 2006
ABSTRACT. For samples KMF3 and (where M is the 3d metallic ion; X=Cl, Br) with the localized spins, above the Neel temperature the expressions for EPR line shape and linewidth as well as for transverse (Tx, Ty ) and longitudinal (Tz) relaxation times of localized spins are obtained.
As an example, the obtained expressions are used for KCuF3. Corresponding plots for the angular dependence of the relaxation times of localized spins are given. The angular dependence of the EPR line shape which has also been obtained using this approach is in complete agreement with the data of previous theoretical and experimental investigations. The results of the carried out analytical study of the angular dependence of transverse and longitudinal relaxation rates can foster new experiments and become very useful for solution of problems of applied character. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: electron paramagnetic resonance, Dzyaloshinsky-Moriya interaction.
gEOPHYSICS
O. Varazanashvili, N. Tsereteli
Tbilisi Earthquake on April 25, 2002: Results of Instrumental and Macroseismic Investigations
Presented by Corr. Member of the Academy T. Chelidze, March 28, 2006
ABSTRACT. The results of investigation of instrumental and macroseismic data of Tbilisi earthquake, April 25, 2002 are presented. On the basis of instrumental data the main kinematic and dynamic parameters of the earthquake and the geometric size of the source are determined. The isoseismal map has been constructed. It was established that Tbilisi earthquake was caused by dextral slip on theTbilisi-Mtkvari fault. The seismic activity of this fault represents a significant risk to Tbilisi. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: seismic history; focal mechanism; fault-plane solution; isoseismal; seismotectonic.
GEOPHYSICS
A. Gvelesiani, D. Kvaratskhelia
To the Problem of Characteristics of Turbulent Vortex Motions in the Black Sea
Presented by Corr. Member of the Academy T. Chelidze, March 28, 2006
ABSTRACT. The vortexes, obtained by numerical barotropic and baroclinic models, are classified from new position by means of universal dimensionless numbers. It is obtained that turbulent Reynolds is more than universal =1 the vortexes are stable, but at < 1 the vortexes gradually damp. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: barotropic, baroclinic model, vortex, turbulence.
GEOPHYSICS
T. Gegechkori, Z. Kvatadze, Sh. Samsonadze, A. Shkurin
On the Methods of Seismic Modelling of Surface Waves
Presented by Corr. Member of the Academy T. Chelidze, March 21, 2006
ABSTRACT. The surface waves due to peculiarities of their kinetic and dynamic data, give an important information about lateral-heterogeneous structure of Earth atmosphere. In order to increase our knowledge about distribution of surface waves in lateral-heterogeneous media it is necessary to provide the physical experiment i.e. three-dimensional ultrasonic seismic modelling. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: lithosphere, surface waves, three-dimensional modelling, piezosensor, dispersion.
Orgainic Chemistry
K. Cherkezishvili, R. Kublashvili
Hydrosilylation of Acetylene a-Glycols by Ethyl Dipropyl Silane
Presented by Corr. Member of the Academy Sh. Samsoniya, April 18, 2004
ABSTRACT. Hydrosilylation of acetylene a-glycols by ethyl dipropyl silane at the presence of the Speier’s catalyst proceeds to triple bond of glycol. Thus, products of addition by Farmer’s rule and by Markovnikov’s rule are formed. Adducts by Farmer’s rule are the basic reaction products. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: hydrosilylation, acetylene a-glycols, ethyl dipropyl silane.
Physical Chemistry
S. Kurashvili, G. Mikadze, O. Mikadze, D. Parchukashvili
Drastic Improvement in Heat Resistance of Chromium Based Alloys
Presented by Member of the Academy G. Tsintsadze, March 7, 2006
ABSTRACT. The presented thermo-chemical treatment procedures of well-known chromium based alloys containing rare earth metals may be used for protection of ready wares of these materials against high temperature influence of oxidizing environments. After oxidation in air at 1200°C during 100 hours the specific weight gain of the best alloy was equal to 3.45 mg/cm2 while the thermo-chemichal treatment was promoted to drastic lowering of this value till 0.12 mg/cm2. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: low-alloyed chromium, thermo-chemical treatment, heat resistace.
Electrochemistry
T. Chelidze, Member of the Academy J.
Japaridze, N. Nizharadze, M. Khokhashvili,
I. Gurgenidze, M. Chankashvili
Electrochemical Behavior of Medical Preparations Aminazine and Levomepromazine
Presented June 26, 2006
ABSTRACT. Electrochemical behavior of psychotropic preparations aminazine and levomepromazine has been studied using the polarographic and impedance methods. It is developed and recommended to determine these preparations by the method of polarography within the concentration ranges c=1·10-6÷5·10-2 mole/l. Measurement of the dependence of a differential capacity on a potential showed that phenothiazine derivatives are linearly oriented in the double layer. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: aminazine, levomepromazine, polarography, analysis, electrochemistry.
Chemical Technology
N. Gogishvili, N. Demuria, G. Agladze, T. Chakhunashvili, L. Shaduri
Determination of Electrochemical Activity of Manganese Dioxide (EMD), Electro-Synthesized from Suspension in the Model Cell of Current Source of Alkaline-Electrolytic Manganese-Zinc System
Presented by Member of the Academy J. Japaridze, April 25, 2006
ABSTRACT. For the purpose of establishment of an electrochemical activity the samples of compact g-modified EMD, obtained by suspension bath process (SBP), were tested in the alkaline-electrolytic model cell of current source of manganese-zinc system. After the prolonged serial experiments at 150-180 A·m-2 current densities, the tests of the obtained samples showed high electrochemical activity. It was reflected on the duration of the model element work, which comprises 160-170 min at the discharge up to 1.0V and 180-190 min at the discharge up to 0.9V.
These data support that EMD deposits, obtained from suspension, are characterized by high electrochemical properties. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: suspension bath, electrochemical activity, alkaline-electrolytic model cell, granulometric composition.
Pharmaceutical chemistry
L. Tsiklauri, V. Sanna, Ts. Sulakvelidze, M.
Benidze, E. Gavini, P. Giunchedi,
Member of the Academy E. Kemertelidze
Development of Method for Improvement Technological Properties of Tribusponin Substance
Presented April 4, 2006
ABSTRACT. In purpose for improvement technological properties of substance of non-hormonal anabolic and anticholesterolemic preparation Tribusponin, the complex of steroidal glycosides, obtained from Tribulus terrestris was formulated with lactose and characterized in terms of physical-mechanical and technological properties. The optimal technology of preparation Tribusponin substance for formulation into tablets by the direct compression technique was evaluated. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Tribulus terrestris, Tribusponin substance, powder, SEM, EMC, technological properties, steroidal glycosides.
GEOLOGY
F. Maisadze
On the Mechanism of Olistostromes Genesis
(On the Example of Eocene Sediments of Georgia)
Presented by Member of the Academy I. Gamkrelidze, April 19, 2006
Abstract. On the basis of analysis of the mechanism of formation of olistostromes developed in the Eocene sediments of Georgia tectonic-gravitational, volcanogenic-gravitational, gravitational and mixed genetic groups are distinguished. Geological catastrophes, particularly tectonic movements and volcanism are considered as the main factors of olistostromes genesis. The analysis of olistostromes demonstrates that they unlike the “event deposits”, are consequence of multiple catastrophic events and their formation is significantly extended in time. Proceeding from all this, the olistostromes occupy a transitional place between the normal sedimentary rocks and the “event deposits”. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: olistostrome, tectonics, volcanism: event deposits, gravitation.
MACHINE BUILDING SCIENCE
G. Chavleshvili, N. Khatiskatsi
About One Application of Topological Transformations
Presented by Corr. Member of the Academy A.Prangishvili, May 8, 2006
ABSTRACT. In the work the following positional problem of descriptive geometry by means of topological transformations is being solved: elliptic paraboloid and frontally projected cylinder are given. We must construct the line of their intersection. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: topological transformation, paraboloid, cylinder.
Hydraulic Engineering
I. Iordanishvili, K. Iordanishvili
Perfection of the Methods of Hydraulic Calculation of Soil Canals
Presented by Member of the Academy Ts.Mirtskhoulava, December 6,2005
Abstract. Optimal calculation of soil canals has been suggested on the basis of the analysis of their functioning in the east Georgia. Calculation formula of noneroding velocity of cohesive soils includes five main factors instead of eleven. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: canal, cohesion, hydraulic calculation, soil.
Hydraulic Engineering
M. Vartanov, Z. Jugeli
Effective Usage of Water Resources for Farming in Georgia
Presented by Member of the Academy Ts. Mirtskhoulava, April 11, 2006
ABSTRACT. Main indicators of water resource are being considered in Georgia. It is shown the tendency of decrease of water supply for irrigation of lands which causes the decrease of agricultural productivity.
The scheme of forming a new water market to improve the situation has been offered. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: land irrigation, Georgia.
Automatic Control and Computer Engineering
Corr. Member of the Academy R. Khurodze, R. Shamugia, R. Kukava
Research of Dependability Characteristics of Technical Systems with Equipment and Time Duplications
Presented April 3, 2006
ABSTRACT. With consideration of new tendencies of development of mathematical theory of reliability proceeding from Recommendation E.862 of International Telecommunication Union on the basis of the theory of dependability, theory of probabilities and theory of queuing the mathematical model is developed and investigated enabling on the stage of predesign research to estimate dependability, effectiveness and efficiency of technical systems having time and equipment duplications and intended for operation in conditions of the effect of random, operation destibilizing factors. The length of job queue execution is taken as the main characteristics of the system. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: failure, renewal, replacement, closed queuing system.
Plant Growing
I. Vasadze, L. Goginava
Peculiarities of the Growth and Development of Strawberry Culture (Fragaria ananassa Duch) in Pure Ecological Zones of Georgia
Presented by Corr. Member of the Academy T. Urushadze, April 4, 2006
ABSTRACT. In the work we have studied root system of strawberry culture considering peculiarities of the species, different ecological zones, soil variety and climatic conditions. Development of root system of two-year-old strawberry plant (local species “Kondoli”) has been studied in some horticulture zones with different soil and climatic conditions. Researches have been realized in soils of different kinds: alluvial, forest taupe and forest brown soils. As a result of researches thermal effect on the dynamics of growth of root system was determined. Recommendations to increase productivity of strawberry gardens are suggested. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: strawberry, root system.
Botany
R. Partenadze
Peculirities of the Growth and Development Habits of Semi-Evergreen Maples in the Conditions of Ajara Seashore
Presented by Corr. Member of the Academy V. Papunidze, March 21, 2006
Abstract. In this paper bioecology and peculiarities of seasonal development (vegetation, flowering, fruiting, frost-resistance etc.) of semi-evergreen Maples in Batumi Botanical Garden are reported. These specimens reveal properties of subtropical woody trees in Ajara coast. They retain green leaves until late autumn and sometimes until winter. These species have shown to be the most perspective plants for landscape gardening in Ajara moist subtropics. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: smooth-leaf maple, long-leaved maple, Monpellian maple, landscape gardening.
BOTANY
T. Djugeli
The Areas of
Distribution of the Caucasian Species of
Genus Serratula L.,
Tribe Centaurinae Hoffm (Compositae)
Presented by Corr. Member of the Academy G. Nakhutsrishvili, April 4, 2006
ABSTRACT. The phytogeographical analysis of 8 species of Serratula in the Caucasus is presented. The species S. caucasica is the Caucasian endemic. The taxons are grouped in 6 sections. The distribution area types are identified and specified. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: floristic, area types, Serratula, high mountain.
Botany
Kh. Khaikashvili
Medicinal Plants of Alpine Belt of Khevi (Kazbegi District, Georgia)
Presented by Corr. Member of the Academy G. Nakhutsrishvili, April 11, 2006
Abstract. In spite of the fact that Khevi (Kazbegi district) is one of the botanically widely studied regions of Georgia, and investigaton of its flora numbers more than 200 years, the paper is the first attempt to pay special attention to the flora of medicinal plants of the region under consideration.
Of about 1200 species of vascular plants distributed in Khevi region, 70 species occured in alpine belt communities are utilized by local population as medicinal plants. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Medicinal plants, alpine belt, Khevi region, Georgia.
Botany
G. Bolkvadze
Seasonal Development Rhythms of Some Evergreen Exotic Plants in Batumi Botanical Garden
Presented by Corr. Member of the Academy V. Papunidze, April 4, 2006
ABSTRACT. In the present study the seasonal development rhythms of 16 evergreen plant species grown in Batumi Botanical Garden are discussed. By the vegetation periods they are divided as relatively long-term and short-term phenorhythmotypes of vegetation. Study of flowering rhythm has revealed the whole year round flowering of the plants. There were noted some changes of flowering and vegetation periods of several plants as compared with those in their homeland. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: evergreen exotic, vegetation, shoot phenophase, flowering.
GENETICS AND SELECTION
N. Khalvashi
Biomorphological Characterization of some Perspective Forms of Washington-Navel Oranges Grown in Chorokhi Gorge (Ajara)
Presented by Corr. Member of the Academy V. Papunidze, March 7, 2006
ABSTRACT.
Some biological and economic indices of perspective
forms of Washington-Navel oranges revealed as a result of experimental
investigations carried out in the citrous plantations of Chorokhi gorge (Ajara)
are discussed. Advantage of some of them over the initial sort is shown.
© 2006 Bull. Georg. Natl. Acad. Sci.
Key words: phenology, form, fruit set, wave of vegetation, saccharides.
GENETICS AND SELECTION
M. Koridze, D. Baratashvili, A. Diasamidze, R. Khukhunaishvili
Study of Biomutagenic Effect of Leaf Extract of Sterile Forms of Kovano Vace Mandarin on Root Meristematic Cells of Welsh Onion (Allium fistulosum L.)
Presented by Corr. Member of the Academy V. Papunidze, April 18, 2006
ABSTRACT. Some products of leaves of Kovano Vace mandarin have been shown to posses mutagenic ability. While acting on genetic apparatus of experimental plant cells these substances cause increase of the level of manifestation of spontaneous mutations. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: chromosome aberration, citruses, mitotic index.
Genetics and Selection
I. Kapanadze, G. Kapanadze, I. Guledani, A. Gasviani
Development of Mitochondria in Squirting Cucumber and Potatoes
Presented by Corr. Member of the Academy P. Naskidashvili, November 15, 2005
Abstract. The bulbs of squirting cucumber (Ecballium elaterium (L.) A. Rich.) and the tubers of potatoes (Solanum tuberosum Lin.) during cultivation without light and soil undergo metamorphosis and generate mitochondria instead of amyloplast. Generation of mitochondria happens from the cell nucleus in form of stroma. The number of the stromas are the same as the number of the objects of chromosome. Each stroma divides three times and generates 8 daughter stromas. The nucleus reduces in the volume during generation of stromas and finally eliminates. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: amyloplast, mitochondrion, metamorphose, elimination.
Human and Animal Physiology
M. Kubaneishvili, G.
Bochorishvili, D. Jamaspishvili, G. Khikhadze,
L. Gvenetadze, L. Kvirkvelia
Behavioural and EEG Reactions Following Damage to the Anterior and Posterior Cingulate Cortex
Presented by Member of the Academy T. Oniani, March 13, 2006
Abstract. In chronic experiments carried out in adult cats influence of electrolytic damage to the anterior (A21–A15) and posterior (A7–A-1) cingulate cortex on the spatial memory tests (conditioned auditory discrimination reflexes) and hippocampal EEG correlates were studied. It is shown that the anterior cingulate cortex of the right hemisphere strongly effects emotional reactions. Electrolytic lesions to this area do not induce marked changes in discriminative learning.
In contrast, electrolytic damage to the posterior cingulate areas (A7–A-1) significantly deteriorates learning processes. In the ipsilateral dorsal and ventral hippocampal fields high amplitude regular synchronized electrical activity of theta frequency (3-7 oscillations/sec) dominates. Transformation of theta activity into EEG desynchronization is not observed.
The experimental results obtained indicate
that integrity of the posterior cingulate cortex (retrosplenial cortex) appears
to be necessary for spatial memory consolidation and transformation of the
hippocampal EEG synchronization into desynchronization at the final stage of
learning.
© 2006 Bull. Georg. Natl.
Acad. Sci.
Key words: cingulate cortical areas, dorsal and ventral hippocampus, EEG activity, functional differentiation, memory consolidation.
Biophysics
V. Bregadze, K. Tsakadze
The Nature of Influence of Mg2+, Co2+, Ni2+, Mn2+, Cu2+ and Zn2+ Ions on DNA Melting Temperature
Presented by Member of the Academy T. Zaalishvili, July 4, 2006.
Abstract. In the work the thermal destabilization of DNA double helix by some bivalent ions at their high content while the others cause only stabilization in the same range of concentrations is discussed. Experimental data show that the ions with destabilizing ability of DNA increase concentration of H+ ions in the solution. Thus, the action of these metal ions can be explained by their dual action – stabilizing effect and destabilization caused by decrease of pH of the solution. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: DNA, thermostability, metal ions, pH.
BIOPHYSICS
M. Chkhaidze, J. Monaselidze, S.G. Haroutiunian, S.G. Gevorkian, V.I. Vardanyan
Microcalorimetric Investigation of Water Soluble DNA-TOEPyP and DNA-Zink TOEPyP Complexes
Presented by Member of the Academy T.Beridze, June 20, 2006
ABSTRACT. Thermodynamic parameters of helix-coil transition of DNA-TOEPyP and ZnTOEPyP-DNA are determined. It is shown that porphyrin is a considerable stabilizer agent for DNA in solutions. It preferably binds to the DNA sites rich with GC base pairs and causes sharp decrease of the melting interval. Zn-porphyrin increases the DNA thermostability, in comparison with porphyrins without Zn. However, it effects equally on DNA sites rich with AT and GC base pairs. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: microcalorimetry, porphyrin, TOEPyP (Tetra-Oxyethylpyridyl-Porphyrin), TMPy (Tetrakis-Methylpyridyl-Porphyrin).
Biochemistry
M. Kobeshavidze, T. Bolotashvili, Corr. Member of the Academy N. Aleksidze
Human Placenta Amnion Galactose-Specific Lectins and their Possible Hormone-Like Action
Presented May 30, 2006
Abstract. Human placenta amnion proteins, which have lectine like activities have been investigated. Galactose-specific lectin has been purified on agarose affine sorbent with HPLC method on Gel-filtrated Ultropac TSK G3000 SW column. It has been determined that Gal-specific lectin has ability to bind steroid hormone specific IgG antibodies by DELFIA method. Accordingly suggestion was made that Gal-specific lectin has similar activities is steroid hormones. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: human placenta, Gal-specific lectins, Progesterone, Estriol, Estradiol.
MICROBIOLOGY and Virology
N. Zakariashvili, L.
Kutateladze, M. Kharebashvili, I. Khokhashvili, L. Daushvili,
M. Jobava, T. Iashvili
Extremophilic Microscopic Fungi Spread in Saline Soils and Salty Lakes of Kvemo Kartli Plane
Presented by Member of the Academy G. Kvesitadze, May 8, 2006
ABSTRACT. The extent of exremophilicy of microscopic fungi, spread in saline soils and salty lakes of Kvemo Kartli plane has been established. The ranges of living pH and temperature for 52 cultures were studied. Optimal values of cultivation temperature and pH of the nutrient medium for particular microscopic fungi have been determined. 28 extremophiles were selected, among them 10 - by temperature, 18 – by pH. Four of the selected fungi were thermophiles, 3 – thermotolerants, 2 – psychrotolerants, 1 – obligate psychrophile, 11 – alkaliphiles and 7 – pH-tolerants. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: extremophiles, microscopic fungi, saline soils, Kvemo Kartli.
MICROBIOLOGY AND VIROLOGY
A. Gulbani, P. Imnadze, G. Katsitadze
Incidence and Peculiarities of Disbalance of Large Intestine Microflora in the Population of Mestia Region, Georgia
Presented by Corr. Member of the Academy N. Aleksidze, April 18, 2006
ABSTRACT. Specific structure of large intestine microflora has been studied in 247 inhabitants of Mestia region. Among them 142 persons were practically healthy with no complaints on intestinal diseases, and 105 persons had different complaints characteristic to diseases of digestive appratus. Alterations have been revealed in qualitative indexes of almost all studied components being manifested by deviation from the standard (excess or deficiency of particular groups of microorganisms as compared with norm). Disbalance of intestinal microflora in the studied population was caused mainly by the excess or deficiency of lactose negative E. coli bacteria (in all 102 cases). Disorders caused by the deficiency of bifid bacteria occupy the second position (deficiency was detected in 94 cases); then follow deficiency of lactose positive E. coli (90 cases) and deficiency or excess of Enterococci (79 cases). Excess of Proteus was detected in 26 cases; excess of fungi of Candida genus was found in 19 cases; excess of hemolytic Escherichia coli in 12 cases; excess of Staphilococcus aureus was detected in 6 cases.
On the basis of results of conducted investigations it can be concluded in the population of Mestia region most frequently the disbalance of intestinal microflora is manifested by the excess of lactose negative E. coli, whereas the results of profile examinations conducted in different regions and cities of Georgia point unambiguously to the priority of deficiency of bifid bacteria. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: microflora, large intestine, specific structure, disbalance.
ENTOMOLOGY
M. Chkoidze
Hemolymph as an Indicator of Physiological State of Different Populations of Eastern Spruce Beetle Dendroctonus micans Kugel
Presented by Member of the Academy G. Gigauri, April 4, 2006
ABSTRACT. Hematological indices of the main pest of Eastern spruce (Picea orientalis Link) Eastern spruce beetle (Dendroctonus micans Kugel) at different diseases are presented. Pathologic spectrum of the pest insect is established according to quantitative, morpological and structural changes of hemocytes. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: pest, hematological indices, population, hemocytes.
ENTOMOLOGY
M. Tvaradze, I. Kraveishvili, B. Todua
Entomophagous Insects of Bark Beetle Ips typographus L. in Borjomi Gorge
Presented by Corr. Member of the Academy I. Eliava, April 18, 2006
ABSTRACT. The complex of entomophagous insects of bark beetle Ips typographus L., one of the most harmful pests of spruce forests of Borjomi gorge, has been studied. A total of 26 species, belonging to 9 families of 5 systematic orders have been revealed. Among them 21 species are predatory insects and 5 parasitoid ones. The measures favoring protection of entomophages and increase of their numbers in biocoenoses are discussed. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: entomophagous insect, parasitoid insect, predatory insect, number regulation, biocoenosis.
Ecology
L. Intskirveli, G. Kuchava, L. Bachiashvili, N. Dvalishvili
Dynamics of Changes of Content of Radionuclides into the Atmosphere on the Territory of Georgia
Presented by Member of the Academy G. Tsintsadze, February 20, 2006
Abstract. On the basis of long-term data of the radioecological monitoring the long-living isotopes, which are presented by aerosols in the atmosphere, are identified. Nowadays they determine the radioactive background of environment on the territory of Georgia. Dynamics of changes of the radioactive background is estimated for the last 15-years period (1990-2005). Contant of radionuclides is in the permissible level and stable. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: radionuclides, pollution, atmosphere.
Experimental Morphology
L. Nadashvili
Correlation between Body Measurements in Georgian Men of Middle Age (40-54 years)
Presented by Member of the Academy N. Javakhishvili, March 14, 2006
ABSTRACT. Of different anthropologic classifications existed until recently the most accepted is division of humans on dolichomorphic, meso- and brachymorphic constitutional types. Dolichomorphic somatotypes are known to have prolonged and narrow face, which correlates with dolichocephalia, where cranial index is 74.9. Brachymorphic somatotypes are characterized by wide face, round skull, cranial index exceeds 80, or if cranial index falls between 75 and 79.9, the skull is regarded as mesocephalic. Dolichomorphic somatotypes are characterized with thin and long neck, while the brachimorphic ones with short and thick neck do. Typological anatomic differences are especially well seen on extremities. In dolichomorphic constitutional type length of extremities exceeds in average by 4% and more that of brachymorphic somatotypes.
It has been established that in dolichomorphic Georgian men aged 40-45 years decrease in body weight takes place, while in brachy- and mesomorphic men increase of body weight is apparent. Reduction of Chest Circumference in dolichomorphic men is marked at more than 45 years of age. Decrease of Body Length with age is most evident in dolochomorphic somatotypes. It has been stated, that the majority of middle aged Georgian men belong to dolichomorphic somatotype, while also the mixed forms are observed. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: brachymorphic, dolichomorphic, mesomorphic somatotypes, body measurement, topologic differences, anthropometric indices.
Experimental Morphology
G. Keshelava, I. Mikadze, G. Abzianidze, I. Amiranashvili, Z. Kakabadze
Exposure of the Internal Carotid Artery on the Level of the Carotid Canal with Minimal Invasion: Anatomical Study
Presented by Member of the Academy N. Javakhishvili, March 26, 2006
ABSTRACT. The purpose of our investigation was to expose the intrapetrous vertical segment of the internal carotid artery with small incision providing maximal preservation of function and integrity of muscles and nerves in the corresponding region. Researches carried out on the cadavers show that surgical approach performed with the preauricular small incision makes it possible to expose adequately intrapetrous vertical segment of the internal carotid artery for shunting. The main points of surgical approach are luxation of the temporal-mandibular bone and milling of tympanic bone apophysis. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: carotid canal, carotid artery, intrapetrous segment.
Experimental Medicine
L. Charkviani, Z. Topuria, M. Rukhadze
Structural Peculiarities of Hemocytes in the Norm and at Pathology
Presented by Member of the Academy T. Dekanosidze, December 27, 2005
Abstract. Blood cells of patients with uterus cancer were studied. Light microscopy method was used. Material was treated according to Anders method as well as method of morphometry using Photomicroscope-III (the Firm “Opton”, Germany). Morphometric indices were corroborated using method of variation statistics. More than 40 parameters were studied. Difference between the indices of norm (control observations) and data of blood cells of patients suffering from uterus cancer was revealed. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: uterus cancer, blood cells, morphometry.
Experimental Medicine
N. Gabadadze, T. Bukia, G. Matsaberidze, M. Khutsishvili
IL-6 as the Indicator of Gastroduodenal Process
Presented by Member of the Academy F. Todua, April 1, 2006
ABSTRACT. We have studied interrelation between HP induced gastroduodenal pathologies and concentration of inflammatory cytokine IL-6 in peripherial blood. Patients with gastroduodenal pathologies (73 patients) have been examined and the obtained results compared with the results of examinations of healthy people (Control Group). The obtained data show that testing of IL-6 concentration in peripheral blood can become one of the additional tests used for diagnostics of chronic gastroduodenal diseases. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: Helicobacter Pylor, Interleukin-6, Cytokine, Tumor Nerosis Factor.
Experimental Medicine
V. Lezhava, M. Gudjabidze
Use of b-Blockers to Control Heart Rate in Patients with Paroxysmal Atrial Fibrillation and Assessment of their Efficacy
Presented by Member of the Academy N. Kipshidze, April 11, 2006
ABSTRACT. The aim of the study was evaluation of b-blocker metoprolol (Metoprolol Succinatis used in Georgia), as a rate control agent in patients with paroxysmal atrial fibrillation (AF) and assessment of its efficacy in heart rate management.
The study included 84 patients (44 men and 40 women, mean age 60), with tachysystolic and normosystolic paroxysmal atrial fibrillation. 50mg of Metoprolol was administrated orally in 42 patients and the other 42 patients did not receive rate control agent (RCA). Effects of metoprolol on heart rate were analyzed and results were compared with control group.
The obtained results suggest that the use of 50 mg metoprolol reduces ventricular response during paroxysmal AF by 40%. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: atrial fibrillation, rate control agent, coronary artery disease, transthoracal electrical cardioversion, heart rate, electrocardiography, left atrium.
Experimental Medicine
G. Iashvili, M.
Chkhikvishvili, V. Maloletnev, M. Chkhartishvili, A. Kraveishvili,
M. Pataraia, G. Alibegashvili
Capacity and Stability as Criteria of the Cardiorespiratory System Functional Fitness at Various Periods of Annual Training Cycle in Sportsmen
Presented by Member of the Academy T. Oniani, March 13, 2006
ABSTRACT. The aerobic power and the cardiorespiratory system (CRS) stability indices were studied in 26 cyclists – stayers divided into two groups (high and medium qualifications). The intragroup increase of aerobic power and the CRS stability indices were observed in the preparatory period. After comparing the stayers’ groups of high and medium qualifications significant differences only in stability indices of the CRS were revealed. In the competition period intergroup increasing of indices of aerobic power was not observed. The differences between the groups in aerobic power indices were not observed either. The data allow to conclude that differences in the level of the CRS functional training are determined not only by the degree of power development but also by the level of stability of the CRS functioning. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: cardiorespiratory system, capacity, stability.
Law
G. Tsaava
"Individual Partnership Action Plan" of the NATO – the Way for Integration of Georgia in the North Atlantic Treaty Organization
Presented by Member of the Academy L. Aleksidze, March 28,2006
Abstract. An IPAP clearly sets out the cooperation objectives and priorities of the individual partner country and ensures various mechanisms corresponding directly to these priorities. Intensified political dialogue on relevant issues may be an integral part of an IPAP process. IPAP also makes it easier to coordinate assistance provided by individual allies and partner countries, as well as to coordinate efforts with other relevant international institutions. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: NATO, IPAP, MAP.
Linguistics
A. Chutkerashvili
Theoretical Approaches to the Lingistic Notion of Theme
Presented by Corr. Member of the Academy G. Kvaratskhelia, May 11, 2006
Abstract. Various approaches to the linguistic notion of theme are considered in the paper. The definitions of theme are mostly based on the classic theory of Halliday which defines the theme of the clause as a point of departure. Some grammarians use the terms given and new instead of the notions of theme and rheme, some prefer to use the terms topic and comment. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: theme, rheme, discourse.
Linguistics
M. Gambashidze
Functional Peculiarities of Detached Adjectives in Nominal Syntagma
Presented by Corr. Member of the Academy G. Kvaratskelia, May 3, 2006
ABSTRACT. Considering the influence of the utterance on the structure of syntagma the author has also studied attributes expressed by detached adjectives on the level of actual division. Preposed adjectives are connected with expressing thematic meaning, but postposed adjectives express rhematic meaning. The principal informational function of syntagmas with preposed adjectives is carried out by noun, but in syntagmas with postposed adjectives informational centre is formed by adjective. Such ordering of nouns and adjectives is called “objective” word order. Theme-rheme relations in nominal syntagma reflect not only natural logic of language that demands a basic and opening point of thematic initial position before rheme – new and unknown information; this relations also reflect semantic aspects of adjectives – their meaning and function: no semic hierarchy is created, no connotative meanings are characteristic of detached adjectives – they are presented by their denotative meanings.
Along with flectional adjectives non-flectional adjectives ending in -a are also used in nominal syntagma in German. Such are, e.g. extra, prima, lila, rosa, etc. that are used in the prepositional as well as postpositional field (Vorfeld/Nachfeld). © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: detached adjectives, nominal syntagma, actual division, theme-rheme relation.
LINGUISTICS
S. Omiadze
On Invective in Georgian Discourse
Presented by Corr. Member of the Academy Z. Alexidze, July 16, 2006
ABSTRACT. One of the functions of invective as verbal aggression expressing emotion and psychological relieve is studied in the paper. The types of Georgian invective are presented: curses, swear - threat. The analysis of old and new texts show that in Georgian invective has been intensified and is presented in today’s discourse in its extremely obscene form. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: invective, obscene words, discourse.
HISTORY OF ART
R. Takaishvili
The Role of Music in Realization of Humanities Scholarship Principle in Education
Presented by Corr. Member of the Academy M. Berdzenishvili, May 1, 2006
ABSTRACT. The article considers the role of music in realization of one of the main principles of modern educational paradigm – humanities scholarship in education system. The trend of thorough study of music, widespread in modern world, is analyzed from this point of view. It is stated that such treatment of music has a long history in Georgia. The facts about urgency of general musical education, including the statistics of sociological studies are considered. © 2006 Bull. Georg. Natl. Acad. Sci.
Key words: modern educational paradigm, humanities scholarship principle, musical education.