volume 169  number 1



G. Bibileishvili

On the Fibers of Proper Real Polynomial Mappings

Presented by Member of the Academy N.Vakhania, August 30, 2002

ABSTRACT. We describe the topological structure of fibers of certain proper polynomial mappings. For mappings with two-dimensional fibers the genera of nonsingular fibers are expressed in terms of signatures of effectively constructible quadratic forms. For quadratic mappings we obtain comprehensive information about the possible topological types of fibers and their bifurcations.

Key words: real polynomial mapping, quadratic mapping, real algebraic variety, mapping degree, Euler characteristic, isolated singular point.


R. A. Kordzadze

On General Representation of One Class of Functions through Holomorphic Functions

Presented by Corr. Member of the Academy R. Bantsuri, June 3, 2003

ABSTRACT. The theorems inverse to the theorems from the author's previous works are proved. This leads to establishing of one-to-one correspondence between the vector spaces and , and . One-to-one correspondence is also established between holomorphic functions with two complex variables of the definite class and .

Key words: one-to-one correspondence, normal convergence, holomorphic function, general representation.


T. Abuladze, B. Dochviri

On the Pricing of the European Options

Presented by Member of the Academy I. Kiguradze, May 21, 2003

ABSTRACT. In this article we have considered the pricing of the European options for nonself-financing strategies in Cox, Ross and Rubinshtein binomial model. Expressions for option's fair price, minimal hedge and its corresponding capital are explicitly defined.

Key words: financial market, option, fair value, minimal hedge.



L. Alexidze, Z. Zerakidze

Optimal Consistent Estimates Connected with Stochastic System

Presented by Corr. Member of the Academy E. Nadaraya, June 10, 2003

ABSTRACT. In the present paper we prove the necessary and sufficient conditions for the existence of optimal consistent estimates.

Key words: Hilbert space of measures, consistent optimal estimates, weakly and strongly dividable statistical structures.


V. Makhareishvili

On the Equivalent Condition of Multiple Series and Integrals Convergence with Respect to the Trigonometric System

Presented by Member of the Academy L.Zhizhiashvili, June 24, 2003

ABSTRACT. In this paper we establish an equivalent condition of multiple series and integrals convergence with respect to the trigonometric system, which is N-dimensional analogue of P.L. Ul'yanov theorem.

Key words: N-dimensional trigonometric Fourier series, Wayl's multiplier.


A. Danelia

An a Priori Estimate of New Type for Solutions of Multidimensional Obstacle Problem

Presented by Corr. Member of the Academy E. Nadaraya, July 23, 2003

ABSTRACT. In the present work an a priori estimate in the theory of variational inequalities (in particular, for obstacle problem) is obtained using the techniques of stochastic analysis. Namely, we essentially use the semimartingale inequalities for the Snell envelopes and the connection between optimal stopping problems and variational inequalities.

Key words: variational inequalities, multidimensional diffusion processes, optimal stopping, Snell envelopes, semimartingales.


N. Toradze

On Certain Partial Sums of Double Separable Haar Wavelet Expansions

Presented by Member of the Academy L. Zhizhiashvili, June 24, 2003

ABSTRACT. In this paper we give explicit representation of Dirichlet kernel for certain partial sums of Haar wavelet expansion of functions. We also investigate behaviour of certain symmetric partial sums of Fourier expansions of functions of two variables with respect to Haar bidimensional wavelet.

Key words: Haar wavelets, Fourier coefficients, Dirichlet kernel.


V. Baladze

On Uniform Shapes

Presented by Corr. Member of the Academy D. Baladze, May 15, 2002

Abstract. In this paper, theorems which give conditions for a uniform space to have an ARU-resolution are obtained. Necessary and sufficient conditions are found for which the shapes of remainders of compactifications are coinsided.

Key words: uniform shape, uniform resolution, absolute uniform shape retract, compactification, remainder.


A. Beridze

Partially Continuous Alexander-Spanier Cohomology Theory with Compact Supports

Presented by Member of the Academy N. Berikashvili, July 1, 2003

ABSTRACT. Partially continuous Alexander-Spanier cohomology functor with compact supports is constructed. It is established that this functor satisfies the dimension and exactness axioms. For the locally compact paracompact spaces the proper homotopy axiom is held.

Key words: cohomology theory, partially continuous map, compact support.


G. Japaridze

A Basic Completeness Theorem for Computability Logic

Presented by Member of the Academy H. Inassaridze, July 1, 2003

ABSTRACT. The previously published paper "A basic soundness theorem for computability logic" outlined a soundness proof for a propositional system that axiomatizes one of the most basic fragments of computability logic. The present paper complements that result by sketching a completeness proof for the same system.

Key Words:computability logic, interactive computation, game semantics, linear logic.


I. Tsivtsivadze

Unilateral Derivatives in the Bettazzi Sense for an Indefinite Integral with a Parameter

Presented by Member of the Academy L. Zhizhiashvili, June 10, 2003

ABSTRACT. An indefinite integral, containing a parameter, is investigated in order to establish the existence of unilateral derivatives in the Bettazzi sense.

Key words: unilateral derivative in the Bettazzi sense, indefinite integral with a parameter.


N. Bokuchava

Oscillating Processes in Biosystems

Presented by Member of the Academy V. Chavchanidze, Jule 15, 2003

ABSTRACT. The paper deals with questions of the modelling of oscillating processes in biosystems. Special attention is given to autocatalytic fermentative chemical reactions, in which reagent concentrations perform continuous oscillations, while the corresponding phase trajectories, away from the equilibrium state of a biosystem, tend to limiting cycles.

Key words: system, reaction, reagent, concentration, kinetics, matrix, oscillation, trajectory, bifurcation, limit cycle.


G. Goderdzishvili, A. Janelidze, D. Mkheidze, G. Darsavelidze, E. Kutelia,

R. Chikovani, T. Mkheidze, G. Janelidze

Inelastic Properties of Monocrystalline GaP
Presented by Member of the Academy T.Sanadze, July 15, 2003

Abstract. The temperature and amplitude dependences of monocrystalline GaP:Te have been investigated in the temperature interval 20-750°C on the amplitudes of tor

sion oscillations 1.10-5 - 1.10-3. In the temperature spectrum of internal friction at the frequency of torsion oscillations ~1Hz. there are revealed the relaxation maxima at 340, 410 and 560°C with the activation energies of 1.45; 1.70 and 2.00eV, respectively. In temperature region of ³500°C multistage change of amplitude dependence of internal friction is found. The peculiarities of the processes of oscillation energy scattering in GaP:Te are discussed with allowance of availability in the lattice of sphalerite type of various dislocations with various mobility and the energy of interaction with the centers of breaking and potential relief of Peierls.

Key words: internal friction, shear modulus, frequency factor, dislocation mobility, activation energy.


E.Kutelia, E.Sanaia, G.Darsavelidze, D.Beradze, T.Dzigrashvili E.Miminoshvili

High-Temperature Internal Friction in Superconducting Ceramics ErBa2Cu3O7-x

Presented by Member of the Academy T.Sanadze, July 22, 2003

ABSTRACT. Temperature dependences of internal friction, shear modulus and lattice parameters of the ceramics were investigated. The X-ray diffraction revealed a nonlinear changes of parameters of orthorhombic phases in the temperature range 200-400 oC, caused by diffusive redistribution of oxygen atoms. Near 200 oC a relaxation peak of internal friction and anomaly of shear modulus were found, caused by movement of twin boundaries, interacted with the oxygen atoms.

Key word: internal friction, shear modulus defect, relaxation maximum, X-ray diffraction, superconducting ceramics.


G. Gordadze, A. Gordadze, V. Kintsurashvili, V. Dundua

Method of Neutron Activation Analysis to Determine Gold Content in the Copper Concentrate

Presented by Member of the Academy N. Amaglobeli, July 7, 2003

ABSTRACTS. We have elaborated method of neutron activation analysis for determination of gold content in the copper concentrate, using the neutron multiplier. The investigations, conducted at the Madneuli integrated copper plant (Georgia) show that the use of optimal temporal regime and polycomparator method makes possible to determine gold content in concentrate with reliable probability of 0.95 and accuracy of 10%. This method can be applied for approval of the fossil copper concentrate.

Key words: neutron multiplier, activation analysis, polycomparator method.


L. Tsintsadze, I. Endo, A. Ogata, K. Nishikawa,

Member of the Academy N. Tsintsadze, N. Papuashvili

New Mechanism of Particle Acceleration by Superstrong Laser Pulses
Presented December 2, 2003

ABSTRACT. Development and study of the feasibility of a new type of particle acceleration based on novel Langmuir waves is presented. The estimation of electron acceleration shows that the acceleration gradient is 2-3 orders higher than the acceleration gradient of laser wake-field accelerator (LWFA) with 100TW lasers.

Key words: strong laser-plasma interaction, high energy particle acceleration.


J. Mebonia, V. Jikia

Three-Particle Momentum Approximation and Reaction H(e, 2e) H+

Presented by Corr. Member of the Academy A. Khelashvili, December 28, 2003

ABSTRACT. Reaction H (e, 2e) H+ is investigated in the framework of three-particle unitary momentum approximation by taking into account the mechanism of a single collision. The results obtained in this way are in good agreement witn the experimental data.

Key-words: three-particle unitary momentum approximation, quasi-elastic scattering.


D. Aladashvili, N. Khomeriki

The Mechanism of Jumpwise Conductivity

Presented by Corr. Member of the Academy A.Khelashvili, November 25, 2003

Abstract. In semiconducting materials at a rather low temperature when carriers of current have not sufficient energy for transition from impurity levels into conductivity bands, which is caused by electrons jump from one impurity to the other into band without activation takes place. Such jumps are called jumpwise conductivity. This mechanism of conductivity lays the foundation to the work of numerous devices and it is interesting from the scientific viewpoint. However in educational programs on condensed medium and semiconductor physics it is either not considered at all or has not sufficient attention. It is stressed that in the learning course on the mechanism of semiconductors conductivity it is obligatory not to be limited only with band conduction but deal with complete temperature interval including low temperature nonband conduction mechanism, which demonstrates the processes proceeding in semiconducting materials more fully.

Key words: jumpwise conductivity.


I. Shekriladze

Survey of the "Classic" Tropical Hurricanes in the Framework of the Model of Equilibrium Translation

Presented by Member of the Academy B. Balavadze, December 20, 2003

ABSTRACT. So-called classic tropical hurricanes Gilbert, Hugo and Andrew are surveyed in the framework of developed earlier model of equilibrium translation (disclosing basic features of an ocean heat potential conversion into dynamical motion of atmosphere). Contrasting cases also are surveyed of supertyphoon Flo and typhoons Gene and Ed. Basic role is demonstrated of the alignment number as an indicator of an equilibrium mode of translation. The phenomenon of extremal intensity of energy conversion by a tropical herricane is identified as the thermohydrodynamical alignment effect (or simply, the alignment effect).

Key words: tropical hurricane, equilibrium translation, alignment number, alignment effect.


M. Elashvlili

Analysis of Near-Field Seismic Records of Explosions by Means of Wavelet Transform

Presented by Corr. Member of the Academy T. Chelidze, December 30, 2003

Abstract. Wavelet transform is a new, efficient tool of time series analysis, providing us with time-frequency decomposition of complicated signals in a form of seismic waves. Transforming time series to time-frequency domain makes it possible identification of different seismic phases and study their frequency composition. Another technology, so-called rectilinearity function measuring degree of linear polarization of wave was applied to seismic data. New tools developed were applied to seismic records of near-field explosions, recorded at Mtatsminda Geophysical Observatory with broadband digital seismograph. Records of explosions were selected because of their simplified form, providing us with good estimate of advantages and disadvantages of modern technologies proposed.

Key words: Seismic phases identification, wavelet transform, polarization analysis.


R. Kublashvili, Corr. Member of the Academy D. Ugrekhelidze

pH Changing of Reaction Medium by Melanoidine Formation

Presented May 27, 2003

ABSTRACT. Studying the model systems of sugars (D-glucose, D-galactose, D-xy

lose) and amino acids (glycine, a-alanine) it is shown that in conditions of Maillard reaction the acidity of reactionary medium raises more strongly in pure sugar solutions, than in solutions of sugar-amino acid mixes. Applying the labeled preparations (1 14C-glycine, 2 14C-glycine), it is shown that carbon dioxide evolved during Maillard reaction is formed not only by decarboxylation of amino acid, but in its formation as well the carbon atoms of methylene group participate. The carbon atoms of carboxylic group of glycine are included in a structure of melanoidine pigment via formation of both formaldehyde and 1-amino-2-deoxy-2-fructose.

Key words: sugars, amino acids, Maillard reaction, pH.


N. Gurgenidze, I. Laperashvili, O. Chikovani, M. Matiashvili, R. Gigauri

New Methods of Synthesis for Symmetrical Secondary Arsines

Presented by Corr. Member of the Academy Sh. Samsonia, December 9, 2003

Abstract. Secondary arsines were synthesized by interaction of Grignard compound with arsenic sulfide and further reduction by powdery zinc in hydrochloric acid medium.

Key words: secondary arsines, Grignard compound.


R. Kvaratskhelia, E. Kvaratskhelia

Formation of the Hydrogen Ions Concentration in the Solutions of Weak Dibasic Organic Acids with the Close and Values

Presented by Member of the Academy J.Japaridze, June 3, 2003

ABSTRACT. The equations describing the regularities of dissociation of weak dibasic acids with the close values of and have been suggested. The "theoretical" relationship between the and values has been shown.

Key words: dissociation, constant, hydrogen ions, concentration, acid.


D. Kereselidze, V. Trapaidze, G. Bregvadze, M. Bliadze

Boundary Conditions of Water Resources Control of Transit Rivers

Presented by Corr. Member of the Academy Z. Tatashidze, June 24, 2003

ABSTRACT. The water volume utilized by the consumer depends on water amount of the upper and lower sections of water management. Therefore it is necessary to deter

mine those boundary extremal values with which the equilibrium of hydroeconomic balance must be preserved. In the present work we attempt to determine the mentioned values.

Key words: transit river, water consumption, optimal model.


Ch. Murvanidze, D. Mzareulova, L. Chanturishvili

Drainage Collector Waters and the Possibility of their Second-Hand Usage

Presented by Member of the Academy O. Natishvili, December 23, 2003

Abstract. On the basis of the results of the present study we consider the possibility of second hand use by dilution method of mineralized collector sewage waters into dimineralized water. The obtained results make possible to use small scale melioration in the mentioned regions in the summer hot months during the deficiency of irrigation water which is rather frequent in the south-east part of the river Alazani valley.

Key words: collector, sewage, demineralized water, drainage.


B. Amaglobeli, O. Mikadze, E. Doliashvili, K. Barnaveli, R. Zekalashvili, L. Rukhadze

Forge Welding of Damascus Swords

Presented by Corr. Member of the Academy I.Baratashvi, June 29, 2003

ABSTRACT. The revealed surface patterns on the blades of forge welded Damascus swords result from microsegregation of spherical carbide colonies forming a microscopic composition saw and thus ensuring the sharpness of the blades.

Key words: surface pattern, forge welding, compositions saw.


V. Ramishvili, A. Nozadze, J. Sharashenidze, K. Papava

Investigation of the Influence of Crystallizator Vibrations on Metal Quality

Presented by Corr. Member of the Academy S.Zhordania, July 1, 2003

Abstract. Crystallizator vibration without oscillation, besides the improvement of crystalline structure and lowering of physico-chemical non-uniformity of continuously casted steel billet, removes surface defects of the bullet in the form of cross folds.

Key words: vibration of casting.

Machine Building Science

V. Margvelashvili

Definition of Deviation of Walking Machines

Presented by Member of the Academy R. Adamia, June 10, 2003

ABSTRACT. The paper is devoted to the study of reasons causing deviations of walking machines and development of methods of their elimination. Computation dynamic model of the machine and corresponding system of differential equations are given. The results of their solution are compared with test results given in the paper too.

Key words: walking machines, vehicles, deviations.

Power Engineering

Corr. Member of the Academy K. Betaneli, K. Vezirishvili

Estimation of the Efficiency of Geothermal Power Supply

Presented April 6, 2003

ABSTRACT. The efficiency of geothermal power supply has been estimated in various branches of Georgian economy. Technical and economical characteristics of geothermal power supply are generalized. On the basis of them nomogram for the calculation of the efficiency of geothermal power supply has been composed. It is obligatory for designing and calculations and it gives considerable economy of fuel and improves ecological conditions.

Keywords: geothermal power supply, efficiency, renewable sources, heat-cold supply, complex system, technical and economical parameters, debit.


Member of the Academy R. Adamia, J. Dochviri

Optimization of Transient Processes in Electromechanical System of Winding Mechanisms

Presented July 8, 2003

Abstract. The adaptive control system for electrical drive winding mechanisms is constructed. Curves of transient processes for these electromechanical systems are obtained.

Key words: electrical drive system, optimal adaptive control, winding mechanisms.

Automatic control and computer Engineering

V. Khocholava

Communication Channel with Hyperexponential Law of Interfering Factor Duration Distribution

Presented by Corr. Member of the Academy A.Prangishvili, July 22, 2003

Abstract. The model of communication channel is considered when time distribution function of interfering factor duration has a hyperexponential form. Mathematical expectation of random time of multiple packet transmission is found.

Key words: communication channel reliability, function of distribution, Laplace transformation.

Automatic control and computer Engineering

N. Chkhaidze, D. Makasarashvili

Probabilistic Analysis of Monotonous System by the Method of Selection of Special Elements

Presented by Corr. Member of the Academy R. Khurodze, November 21, 2003

Abstract. The probability analysis of the existence of connectivity between two random (arbitrary) nodes of complex communicative network is fulfilled in the article. The method of selection of special elements in monotonous structures is implemented.

Key words: communication, special element, failure, serviceability.

Technology of Materials

T. Abzianidze, S. Shalamberidze, I. Bairamashvili, G. Gelashvili, V. Kasradze,

L. Kekelidze, V. Chkhikvishvili

Investigation of the Process of Boron Carbide Production by Carbothermal Reduction of Boric Acid

Presented by Member of the Academy G. Gvelesiani, December 9, 2003

Abstract. Results of theoretical and experimental studies on carbothermal reduction of boric acid are presented. Using the thermodynamics first variation principle detailed computational study of equilibrium composition in B-O-C system was performed for wide temperature range and initial charge with various B2O3 to C ratio. Reactions, involving gaseous boron-containing components, mainly (B2O3)gas and its dissociation fragments, as well as carbon monoxide play key role into boron carbide formation. Experimental studies permit to make the following conclusions: boron carbide, obtained by the method of carbothermal reduction of boric acid shows high purity, metallic impurities do not exceed 0.1 % wt. Independent of boric acid content in the initial mixture carbothermal reduction method does not

permit to obtain boron carbide with ration B:C>4 (typical ration B:C=3.8).

Keywords: boron carbide, boric anhydride, carbon, carbothermal reduction.

Plant Growing

V. Gogitidze, G. Gagua

Agroecological Prospects of Restoration and Development of Olive Crop in Georgia

Presented by Corr. Member of the Academy Z. Tatashidze, July, 20, 2003

Abstract. The article deals with the agroecological peculiarities of restoration and devolopment of olive crop in Georgia. Agroclimatic conditions of olive growing have been studied. A list of olive sorts is recommended both for Western and Eastern Georgia.

Key words: agroecology, olive.


Corr. Member of the Academy G. Nakhutsrishvili, O. Abdaladze, M. akhalkatsi

On the Treeline Vegetation of the Kazbegi Region

(the Central Caucasus)

Presented December 2, 2003

Abstract. This paper presents the survey of the treeline vegetation of the Kazbegi region at elevations from 2150 to 2500 m a. s. l. The physical and geobotanical conditions, in which this vegetation has been formed, are characterized. The treeline vegetation has been remarkably degraded because of the human impact (deforestation, overgrazing). Forest plots assessed as being close to natural are described and, further, perspectives of this vegetation in connection with the global warming are considered.
Key words:
Birch forest, treeline, Betula litwinowii.

Genetics and Selection

M. Koridze

Variation Frequency of Morphological Properties in Spontaneous and Induced Mutants of Mandarin Kovano Vace

Presented by Corr.Member of the Academy P.Naskidashvili, July 25, 2003

Abstract. We have studied variation frequency of morphological properties in natural and induced mutants of mandarin Kovano Vace. It has been established that during natural as well as induced mutation homological variations are formed according to the growth strength, leafstalk morphology, fruit form and coloring. By a separate feature these variations are revealed with different rate.

Key words: mandarin, mutant.


D. Baratashvili

Influence of Pollen Treated with Mutagens on Form Creation and Characters' Domination in Tea Plant

Presented by Corr. Member of the Academy V. Papunidze, October 7, 2003

ABSTRACT. Influence of both irradiated and treated with chemical mutagens tea plant pollen on the productivity of cross-breeding and characters' domination, as well as the frequency of recombinants' formation have been investigated. Cross-breeding was the most productive (29-32%) after using the radioisotopes (32P, 35S), while the maximum frequency of recombinants was observed after application of 14CH3-nitrosomethyl urea (5-8%). In both variants of cross-breeding (Kimin´Colcheti, Colcheti´Kimin) the change in the ratio of characters' domination in M1 in favor of the variety Colcheti is shown.

Key words: chemical mutagen, tea plant, pollen, morphogenesis, cross-breeding, segregation, character's domination.


M. Chkhikvishvili, E. Abaishvili, E. Agdgomelashvili, V. Maloletnev, L. Kokoeva,

G. Iashvili, G. Lotuashvili

Dynamics of Economy Values of Cardiorespiratory System in Bicyclists of Various Specialization Depending upon Annual Cycle Training

Presented by Member of the Academy T.Oniani, July 29, 2003

Abstract. Under the influence of the specialized training, the bicyclists-stayers are observed to have the pronounced dynamics of the economy of the cardiorespiratory system functioning. The factor achieves its maximum in the period of competitions.

The economy factor of cardiorespiratory system functioning is the significant component of the stayers' functional training. The role of this factor in the sprinters' functional training is less important.

Key words: bicyclists, functional training, economy, cardiorespiratory system, sprinter, stayer.

Human and Animal physiology

A. Surmava, M. Pataraia, F. Kalandarishvili, I. Khachidze, G. Iashvili, V. Maloletnev

Dynamics of some Immunological Indices of the Rats in Stress Conditions

Presented by Member of the Academy T.Oniani, July 8, 2003

ABSTRACT. Dymanics of rosette-formation, lymphocyte-segment-nuclear neutrophyle ratio (LSNR) coefficients and indices of the rats' emotional status were evaluated in conditions of brief and chronic stress. It was found that different stress models differentially affect an emotional status of the animals (strain is less in a case of chronic stress). Rosette-formation with ship erythrocytes did not occur in the rats. It was determined that LSNR coefficient values correlate with increased anxiety in the rats as evidenced by the Open Field test.

Key words: immunity, emotional status, Open Field, rats.


T. Iashvili, N. Zakariashvili, T. Burduli, L. Kutateladze

Conversion of Cellulose-Containing Wastes by Chaetomium thermophile T-1 into Protein-Rich Biomass

Presented by Member of the Academy G. Kvesitadze, November 11, 2003

ABSTRACT. Chemical composition of cellulose-containing wastes was studied with the aim to identify prospects of their usage as substrates.

Thermophilic mutant strain Chaetomium thermophile T-1 was cultivated on selected substrates for receiving biomass. At the initial stage the highest content of protein was found while using tomato pressed skin as carbon source. At the second stage, introduction of the tomato pressed skin into nutrient medium gave as result the Chaetomium thermophile T-1 biomass with proteins containing irreplaceable amino acids. It should be stressed that the content of amino acids in the biomass is above the FAO standards.

Key words: substrate, mutant strain, biomass, amino acid, cellulose.


R. Zamtaradze, N. Mchedlishvili, N. Omiadze, L. Gulua, M. Abutidze,

Member of the Academy G. Kvesitadze

Monophenolase and Diphenolase Activities of Phenoloxidase from Walnut (Juglans regia L.) Green Husk

Presented July 8, 2003

Abstract. Monophenolase and diphenolase activities of phenoloxidase from green husk of walnut (Juglans regia L.) fruit during growth have been studied. Both monophenolase and diphenolase activities achieved their maximal level at the beginning of July. Changes in pH optima of these enzymes during the walnut fruit intensive growth have been shown. Substrate ( p- cresol) interacts with monophenolase in a complex manner with negative cooperativity. The Hill coefficient value (nH) was 0.2. Diphenolase demonstrated simple Michaelis-Menten kinetics. Km for pyrogallol was found to be 14mM.

Key words: phenoloxidase, monophenolase, diphenolase, green husk, pH optimum,



A. Kalandia, G. Papunidze, M. Vanidze, S. Papunidze

HPLC of Stevia (Stevia rebaudiana Bertoni) Diterpene Glycosides

Presented by Member of the Academy N. Nutsubidze, May 6, 2003

ABSTRACT. Diterpene glycosides of Stevia rebaudiana Bertoni have been studied by HP liquid chromatography on Bondapac NH2 column with acetonitryl-water (84%), detection at 210 nm. Four main compounds _ steviozide (13-O-b-D-glucopyranosyl, ent-cauren-16) and rebaudioside A (13-O-b-D_glucopyranosyl-(1-2)-O-b-D-glucopyranosyl, (1-3)-O-b-D- glucopyranosyl, 19-oxo-O-b-D_glucopyranosyl, ent-cauren-16), rebaudioside C and dulcoside. Their content varies in different parts of the plant.

Key words: stevia, chromatography, stevioside, rebaudioside A, C, dulcoside, identification, quantitative content.


R.Kupatadze, J.Gogorishvili, M.Melikishvili, M.Dolidze,

K.Kuridze, M.Simonidze, M.Chelidze

Extraction of Myosin from Bovine Brain and some of its Physical and Chemical Properties

Presented by Corr. Member of the Academy T. Zaalishvili, July 22, 2003

Abstract. To determine similarity and difference of head brain and muscle myosins their motility in PAGE, ATP-activity and superprecipitation have been compared. The electromicroscopic method showed that at optimal conditions for muscle myosin activity (0.1M KCl, pH 7.5) the bovine brain myosin threads are much more shorter but they are characterised with the same high compactivity.
Key words:
non-muscle myosin, ATP-activity, electromicroscopic method.


N. Omiadze, N. Pruidze, N. Mchedlishvili, L. Gulua, M. Abutidze,

L. Daushvili, Member of the Academy G. Kvesitadze

Inhibition of Tea Leaf Phenoloxidase by Sulfur Dioxide

Presented December 17, 2002

ABSTRACT. Inhibitory effect of sulfur dioxide on tea leaf phenoloxidase activity has been shown. Sulfur dioxide causes slight shift of pH optimum of phenoloxidase (pH 5.3) to alkaline area (pH 5.6). The mixed or complex mode of inhibition of phenoloxidase activity by SO2 has been demonstrated. Inhibition of tea leaf phenoloxidase by SO2 has been found to be reversible.

Key words: phenoloxidase, tea leaf, SO2, inhibition.

Microbiology and Virology

T.Suladze, M.Darsavelidze, Member of the Academy T.Chanishvili,

M.Elizbarashvili, E.Burduli

Selection of Phages Active against the Multiple Antibiotic-Resistant P.aeruginosa

Presented July 3, 2003

ABSTRACT. Total of 14 clones of phages active against the freshly isolated antibiotic- and phage-resistant P.aeruginosa microorganisms have been selected in the years of 1999-2001. According to their morphology the above clone virions were divided into three groups: two phages belonged to Myoviridae family; one phage _ to Syphoviridae family, and eleven phages _ to Podoviridae family. According to the studies of lytic activity of 14 clones of P.aeruginosa phages, against both homologous and heterologous strains, it was found that the most high lytic activity (3.1010-7.1010 ) and wide range of action (49.2%) were characteristic for eight phages of Podoviridae family.

Key words: Pseudomonas aeruginosa, bacteriophages, virions, morphology, lytic activity.

MICROBIOLOGY and virology

L. Basilashvili, M. Kikvidze, M. Bagalishvili, Member of the Academy N. Nutsubidze

Selection of Mixed and Monocultures of Nitrogen-Fixing Microorganisms for Production of Microbial Preparations

Presented June 17, 2003

ABSTRACT. The effect of mixed and monocultures of nitrogen-fixing microorganisms on soybean plants in field experiments has been studied.

It was revealed that the mixed cultures of nodule bacteria and Azospirillum were more effective for soybean plants as compared with monocultures of nodule bacteria. In particular, plant biomass, yield and protein content increased. According to experimental data it was stated that the selected strains can be used for the preparation of the microbial preparations.

Key words: Azospirillum, nodule bacteria, mixed and monocultures, soybean.


R. Gakhokidze, E. Kimutsadze, Z. Putkaradze

The Effect of Biorag on Technological Indices of Mulberry Silkworm Cocoon

Presented by Corr. Member of the Academy P. Naskidashvili, July 15, 2003

Abstract. It has been established that the use of Biorag increases biological and technological indices of mulberry silkworm in a considerable degree.

Key words: Biorag, mulberry silkworm.


A. Bukhnikashvili, V. Chkhikvadze

Indian Crested Porcupine (Hystrix indica) in Georgia

Presented by Corr. Member of the Academy I.Eliava, June 10, 2003

Abstract. Porcupines inhabit Georgia since late Miocene Pleistocene period. Hystrix indica lived only in Talysh and Lenkoran in the 20ies of XX century. Through the next 80 years it had spread to the West and reached Georgia. In 2000-2002 the traces of dwelling of Hystrix indica had been found out in the vicinity of the rivers Iori and Alazani.

Key words: Hystrix indica, distribution, Georgia.


T. Arabuli

The Quantitative Dynamics of Oribatid Mites (Acari, Oribatida) in Natural Ecosystems (Hornbeam (Carpinus caucasica Grossh.) Forest)

Presented by Corr. Member of the Academy I. Eliava, June 3, 2003

ABSTRACT. The quantitative dynamics of oribatid mites in hornbeam (Carpinus caucasica Gossh.) forest on eastern slope of Gombori Range (Caucasus, Georgia) is discussed. Seasonal distribution of Tectocepheus velatus, Oribatula tibialis and Minunthozetes pseudofusiger is shown. Spring and autumn quantitative maxima and summer and winter minima are registered.

Key words: Oribatida, quantitative dynamic, Georgia.


O. Zenaishvili, G. Chubabria, M. Manjgaladze

Preliminary Results of Fasciolosis Treatment with Egathen in Human Patients

Presented by Corr. Member of the Academy B. Kurashvili, July, 22, 2003

Abstract. Out-patient treatment course with Egathen has been applied to 96 patients. Daily treatment dosage of Egathen per patient constituted 20 mg/kg of weight. Patients have endured the medicine satisfactorily and there were no side-effects observed. It has to be mentioned that patients have been quickly relieved from signs of intoxication on the second day of treatment by Egathen, and their general condition kept improving day by day. The leukocytes numbers had comparatively quickly normalized initially in peripheral blood, as well as the ESD and eosinophilic indications.

Authors are declaring with full confidence that Egathen is highly effective, non-toxic and easily applicable medicine for fasciolosis treatment in human patients.

Key-words: fasciolosis, parasitic disease, helminthosis, eosinophilic reaction, serologic reaction, immuno-enzyme test, diagnosis, Cloxyl, Tricklabendazole, Egathen, paragonimiasis, peripheral blood.


G. Galdava

Application of Glutoxim as Immunomodulating Means in Complex Therapy of Chronic Inflammatory Processes of Genital Organs in Infertile Males

Presented by Member of the Academy V. Bakhutashvili, April 8, 2003

ABSTRACT. The obtained results testify the high curative effect of Glutoxim at chronic inflammatory processes of genital organs. The use of the mentioned remedy in complex therapy of infertile males with chronic inflammatory processes of urogenital organs makes the treatment more effective on the expense of autoimmune processes regulation. The absence of side effects and complications against the background of antibioticotherapy testify to the capability of Glutoxim for prevening immuno-suppressing action of antibiotics. Glutoxim promotes restoration of immunity T-system, which is expressed in normalization of absolute and percent number of T-lymphocytes, T-helpers, T-suppressers, phagocytic activity of neutrophils, phagocytic number and index, IL-8 concentration in blood. Based on carried out investigations Glutoxim can be recommended for the treatment of patients of the above mentioned category.

Key words: infertility, immunity, IL-8, Glutoxim.

Experimental Medicine

T. Geladze, G. Japaridze, D. Kvernadze, Z. Kevanishvili

Auditory Slow Cortical Potential in Patients with Partial Epilepsy

Presented by Member of the Academy, S. Khechinashvili, July 3, 2003

Abstract. Auditory slow cortical potentials (SCPs) have been registered in 36 patients with partial epilepsy previously untreated by anticonvulsants. Peak-latencies, interpeak intervals and amplitudes were estimated and the mean group values were compared with the respective data in age- and gender-matched healthy individuals. SCP char

acteristics demonstrated regular differences: the P2 peak-latency in the patients was prolonged and both the P1N1 and N1P2 amplitudes were increased. Considering the mechanisms of the SCP, it has been suggested that the SCP-generating cortical areas, being primarily of non-specific qualities, are intimately involved in the mechanisms of epilepsy.

Key words: auditory evoked potentials, slow cortical potential, partial epilepsy, parameter peculiarities.

Experimental Medicine

I. Tchokhonelidze

The Association of 24-Hour Blood Pressure Levels in CAPD Patients with Peritoneal Transport Properties

Presented by Member of the Academy L. Managadze, September 9, 2003

ABSTRACT. Continuous ambulatory peritoneal dialysis is the method of renal replacement therapy in the patients with chronic renal failure, that provides more effective management of hypertension and extracellular volume overload, than hemodialysis. However, beyond 2 years of treatment with peritoneal dialysis some of patients were overhydrated and had hypertention and LVH. We have investigated peritoneal transport properties in our CAPD patients by means of peritoneal equilibration test and tried to find the correlation between the peritoneal transport properties and overhydration rate. We have shown, that the high and high average transporters are more often fluid overloaded and are therefore more frequent hypertensive than low and low average transporters. These findings indicate, that for decreasing the hypertension and for reducing the incidence of cardiovascular mortality in CAPD patients it is important to tailor the CAPD regime after the peritoneal equilibration test, that provides better dehydration and normalizes blood pressure.

Key words: continuous ambulatory peritoneal dialysis, peritoneal equilibration test, peritoneal transport, hypertension, left ventricular hypertrophy.

Experimental Medicine

M. Gagua, L. Jvarsheishvili, Ts. Kharaishvili

The Role of Transvaginal Color Doppler in the Differential Diagnosis of Ovarian Tumors and Tumor-Like Lesions

Presented by Member of the Academy F. Todua, July 1, 2003

Abstract. Transvaginal color doppler imaging is considered to be the most reliable method for evaluating the vascularization of the ovarian tumors and tumor-like lesions. Malignant ovarian tumors, in comparison with benign tumors, have characteristic blood flow features.

According to our records, benign ovarian lesions have a scant blood supply located

peripherally with a high resistance to blood flow; however, malignant tumors are highly vascularized lesions with mostly centrally located vascularization and a low vascular resistance to blood flow.

Key words: ovary, diagnosis, dopplerography, tumor, angiogenesis.

Experimental Medicine

V. Verkhovskiy, I. Vernigora, E. Molyuk, Iu. Mikityuk

The Influence of Preparation Sunamol on Metabolism of Strontium-90 in the Organism of Rabbits

Presented by Member of the Academy V. Okujava, December 28, 2003

Abstract. The whole-world ecological catastrophe on Chernobyl atomic electrostation (Ukraina) put forward new problems for life security of the mankind demanding deep investigation. In the conducted model experiments the role of calcium containing preparation Sunamol on metabolism of strontium-90 in the animal organisms has been observed. Special attention was paid to bone tissue in the condition of standard injury of tibia.

Key words: strontium-90, Sunamol, release.


T. Tsiskarishvili, V. Macharashvili, G. Kajaia

To the Study of Daphnia (Ctenodaphnia) mediterranea Alonso, 1985 Population of the Lisi Lake

Presented by Corr. Member of the Academy I. Eliava, July 29, 2003

ABSTRACT. The paper presents some morphological characteristics of representatives of the Lisi Lake population of Daphnia (Ctenodaphnia) mediterranea as well as the data on size and weight of different age and sex groups of the population and females' productivity. Demographic structure of population, variability of population number and biomass are discussed in connection with salinity of the Lisi Lake.

Key words: Daphnia mediterranea, zooplankton, population structure.


Sh. Ogbaidze

Technical Means of Purification of Exhausted Gases of Heavy Traffic and Metallurgical Enterprises from Metals

Presented by Member of the Academy Ts.Mirtskhoulava, July 29, 2003

ABSTRACT. The quantitative contents of some metals in the air basin of Tbilisi-Rustavi, also in the gases emissioned during technological processes of metallurgical processing and in transport exhaust are determined. Technical means ensuring high quality of purification of gases from metals are suggested.

Keywords: atmosphere, pollution, sorbent, atomic-absorption, metal.


N. Kuparadze, V. Gvarjaladze

On the Formation of Learning and Critical Thinking Skills

Presented by Member of the Academy Sh. Nadirashvili, October 7, 2003

Abstract. On the basis of teaching process in the secondary school new methods of forming learning and critical thinking skills while comprehending with student are implemented. Analysis of the traditional and new methods in order to show the advantage of the latter are presented in the article. New methods help to bring up young people for a democratic country with civil thinking.

Key words: critical thinking skills, developing learning, new methods, teaching process, bringing up a citizen.


N. Abesadze, N. Chikhladze

Methodological Issues of Statistical Study of Women's Employment Dynamics

Presented by Member of the Academy L. Chikava, July 25, 2003

Abstract. Transition of management to the economic methods caused structural shifts in economy. As a result real unemployment was produced. Difficulties in the employment sphere are acutely revealed in the sex aspect. Hence, the accent was put on the description of statistical methods of women's employment dynamics to study quantitative characteristics. With this purpose indices of women's employment were used, besides the influence of factors, included in the model at the employment level was revealed. For the measuring of the influence of labor resource sexual structure on the dynamics of labor coefficient of the population indices of variable, constant and structural shifts were set up.

Key words: index, coefficient, employment, work-able age, share.


D. Vekua

Some Economic Aspects of Social Policy Regulation by Government

Presented by Corr. Member of the Academy A. Silagadze, December 23, 2003

Abstract. The most important strategic problem, which is to be solved by the country in conditions of transition economy has been considered in the present paper. This problem concerns the adjustment of social sphere to the new economic conditions without which it is impossible to attain social conformity and stability in the society. The main principles, which realization makes possible for the government (as macroeconomic regulator) to be actively involved in the acceleration of social stability and economic growth are considered. The implementation of the offered recommendations will strengthen the formation of the stable social security system.

Key words: macroeconomic regulation, optimization, harmonization, institution, personification, pension.


N. Asatiani

Miniature Prose

(According to Galaktion Tabidze's Prosaic Works)

Presented by Corr. Member of the Academy E. Khintibidze, November 16, 2003

Abstract. Being a poet with refined taste and a master of melody, Galaktion Tabidze also worked in the genre of short prose. Archives keep materials numerous examples of short stories. G.Tabidze's lyrical miniatures have reflected his own thoughts and psychological sentiments in a most original manner.

Key words: miniature prose, G.Tabidze.

History of art

N. Iamanidze

Location of Baptisteries in the Early Christian Period of Georgia

Presented by Corr. Member of the Academy Z. Alexidze, December 30, 2003

Abstract. We consider the problems of the existence of fonts in Tsverodabali Church of St. George at Cheremi, Tavkveri (Gldani) church, completely destroyed Zhaleti church, the church of Bzybi fortress, the church of Anator, the Ninotsminda church.

Key words: font, baptisteries.

History of Art

Z. Dolidze, G. Iasashvili

World Perceived through the Magnifying Glass

Presented by Member of the Academy G. Giorgadze, October 28, 2003

Abstract. In the present paper, we consider the synthesis of artistic and psychological aspects with the specificity of television. The art of television represents an independent sphere of art, which includes any genre, artistic form and style. Irrespective of all this it is an original piece of art, which is constantly subjected to variability and perfection. However all this requires systematic control in order for television specificity or telearchitectonics not to be broken even for a second. The synthesis of artistic and psychological aspects should happen in such way that television can always dominate.

Key words: television art.