MOAMBE

2001

volume 163 number1Jenuary-February

 

Mathematics

G.Japaridze

A Task Semantics for the Language of Linear Logic

Presented by Corr. Member of the Academy N.Berikashvili, October 31, 2000

Abstract. A game semantics is introduced. Formulas of linear logic are understood as resource-bound tasks that are to be accomplished by an intelligent agent. An axiomatization of the corresponding logic is given.

Key words: linear logic, game semantics, task semantics, action, planning.

Mathematics

G.Khimshiashvili, R.Przybysz

Topological Aspects of Sklyanin Algebras

Presented by Corr. Member of the Academy N.Vakhania, September 15, 2000

Abstract. We introduce a class of algebraic Poisson structures on R4 which appears to contain well-known Sklyanin algebras. For this class, we explain how to obtain useful topological information by computing Euler characteristics of Casimir levels and analyzing the combinatorial structure of the corresponding foliation of R4. This enables us to explicate previously known topological results about Sklyanin algebras and formulate some interesting problems about algebraic Poisson structures on R4.

Key words: Sklyanin algebra, Casimir function, Euler characteristic, mapping.

Mathematics

I. Tsereteli

On an integer-valued topological invariant and itís behavior under one-to-one continuous mappings of special spaces

Presented by Corr. Member of the Academy H. Inassaridze, June 7, 1999

Abstract. Tychonoff spaces with finite-order remainders are studied. Some facts concerning the behavior of such spaces under one-to-one continuous mappings are established.

Key words: One-to-one continuous mapping, Tychonoff, compactification, dimension.

Mathematics

G.Laitadze

Generalization of the Fanís Fixed Point Theorem and Equilibrium Points in Abstract Economy

Presented by Corr. Member of the Academy N.Berikashvili, February 22, 2000

Abstract. In this paper we generalize Fanís fixed point theorem. Based on this fixed point theorem, the existence of an equilibrium point of an abstract economic model is proved.

Key words: multivalued map, almost upper semicontinuous, almost convex, abstract economy, equilibrium point.

Mathematics

M.Bakuridze

On Fourier Trigonometric Series

Presented by Member of the Academy L.Zhizhiashvili, January 4, 2000

Abstract. Some approximate properties of Cesaro means of negative order of Fourier trigonometric series are established.

Key words: Cesaro means, Fourier trigonometric series.

Mathematics

A. Danelia, M. Lekishvili

On Several Properties of the Conjugate Functions of Multivariables

Presented by Member of the Academy L.Zhizhiashvili, January 25, 2000

Abstract. In this paper we study the smoothing properties of conjugate functions of multivariables active on the C(Tm) class and approximate properties of several cube transformations of conjugate series along the diagonal of the Tm.

Key words: conjugate functions, Cesaro and Abel-Poisson transformations, modulus of continuity, Zygmund's condition.

Mathematics

T. Kopaliani

Boundedness of Hardy Operators in Banach Function Spaces

Presented by Member of the Academy L. Zhizhiashvili, October 5, 1999

Abstract. Characterization of a class of Banach function spaces on which the Hardy operators are bounded, is given.

Key words: Banach functional spaces, Hardy operator.

Mathematics

U. Goginava

On the Divergence of Walsh-Fourier Series of the Classes

Presented by Member of the Academy L. Zhizhiashvili, March 8, 1999

Abstract. In 1994 the author formulated sufficient condition for the uniform convergence of Walsh-Fourier series of the class . In this paper we prove that this condition is necessary for the uniform convergence of all Walsh-Fourier series of the class .

Key words: Walsh-Fourier series, uniform convergence.

Cybernetics

 

N. Tkemaladze

Unsupervised Classification of Objects

Presented by Member of the Academy V. Chavchanidze, December 2, 1999

Abstract. The heuristic method of unsupervised classification of objects is elaborated. In this method there are used artificial parameters and proximity between the blocks of BIB- or PBIB(2)-design which is constructed on the basis of the descriptions of objects.

Key words: unsupervised classification, artificial parameter, BIB-design, PBIB(2)-design, proximity.

Cybernetics

G.Bolkvadze

Adaptive Stabilization Problem of Nonlinear Dynamic Objects of Hammerstain Class

Presented by Member of the Academy I. Prangishvili, November 16, 1999

Abstract. In this paper the adaptive control problem in closed-loop identification system of nonlinear dynamic object of Hammerstain class is reviewed. The models obtained for open-loop system during the process of solving the problem of identification after successful solving the tasks of convergence of identification algorithms may be used for processing the affective adaptive control methods in closed-loop system. At this time it rises the problem of control system stabilization, the successful solving of which gives the possibility to create steady adaptive control system (ACS) on the base of computer technics. ††††

Key words: nonlinear dynamic object of Hammerstain class, adaptive control systems, stabilization problem.

Cybernetics

M.Mikeladze, A.Chaduneli , M.Gogebashvili

Determination of Modification of Plant Radioresistance for Ecological Prognosis of Mountainous Regions

Presented by Member of the Academy M. Salukvadze, September 5, 2000

Abstract. By the conducted of investigation we have ascertained the coefficient of correction of changeability of plant radioresistance towards the vertical zonality to determine of which the logistical function was used. The mentioned method can be used in the mathematical models which are constructed for prediction of irradiation affect consequences on biogeocenosis. By analyzing the different plant radioresistance, which provokes the various changes of interaction processes within population, it is possible to predict the global successive phenomena.

Key words: Plant radioresistance, mathematical model.

Physics

M.Chubabria, Z.Jaliashvili, N.Kavlashvili, T. Medoidze, G.Tsintsadze

Properties of Superconducting Ceramics of Y1Ba2Cu3O7-d Type in Low Magnetic Fields

Presented by Corr. Member of the Academy T.Sanadze, December 28, 1999

Abstract. The character of superconducting transition of ceramics of Y1Ba2Cu3O7-d type in low magnetic fields (up to 150 oersted) has been investigated. The shift of the temperature of zero resistance Tco in magnetic fields sharply depends on initial parameters of the ceramics of high temperature superconducting transition.The dependence of critical current on magnetic field has been studied for samples which are different according to density and specific resistance.

Key words: superconductivity, low magnetic field, critical current density.

Physics

I. Metskhvarishvili

The Critical Currents Isotropy in the High Temperature
Superconductor Ceramic Bi1.6Pb0.3Sr2Ca2Cu2.8Oy Caused by Rotated AC Field

Presented by Corr. Member of the Academy T. Sanadze, December 14, 1999

Abstract. This work is devoted to experimental investigations of the linear- and circular-polarized ac fields penetration into granular high-temperature superconductors. The experimental results show that when the effective penetration depth leff is less than characteristic grain size izotropic model is preferred.

Key words: high temperature superconductor, Josephson junction, grain size, linear-polarized ac fields, circular-polarized ac fields, flux-line-cutting model, isotropic model.

Physics

A. Gerasimov, A. Bibilashvili, Z. Bokhochadze, N. Gochaleishvili

On Nature of the Difference between the Values of Self-Diffusion Coefficients for Elements in Solid and Liquid States

Presented by Corr. Member of the Academy T.Sanadze, February 22, 2000

Abstract. We explain the great difference between the values of self-diffusion coefficients and their temperature dependences for elements in solid and liquid states in case of melting temperature. It is possible to indicate that the value of diffusion coefficient, on the whole, is determined by the concentration of antibonding quasiparticles (AQP). We have shown that in the melting point the great difference between AQP concentrations (1019 and 1021cm-3) causes the considerable difference between the self-diffusion coefficients of substance in solid and liquid states, and the difference between temperature dependences is caused by the fact that the relative change of AQP concentration in liquid state is much less than in solid state.

Key words: mechanism of diffusion, self-diffusion, melting, semiconductors, metals.

Physics

B. Maisuradze

Necessary Means to Conjugate the Computer with the Present Technique of Hydropower Station

Presented by Member of the Academy N. Amaglobeli , October 17, 2000.

Abstract. The present system of control and protection in hydropower station wears out and needs renovation with modern apparatus. Sudden change of old technique with the new one may cause serious impediments as some unforeseen defects may appear. To avoid the break in providing the electric power it should be better to introduce new technical means in parallel with the old one and after expiring the testing time to drive the old technique out of control system step-by-step. The most recent achievement of technique is a computer. The program is developed, which allows to obtain information from all the points of the hydropower station, and after having processed this information react accordingly.

Key words: hydroelectric power station, optoelectric couple, computer.

Physics

G. Gordadze, A.Gordadze, K.Megrelishvili

Study of the Possibility of Multielement Neutron Activation Analysis of Geological Samples by Means of Neutron Multiplier

Presented by Member of the Academy R.Salukvadze, June 6, 2000

Abstract. We have studied the possibilities of performing multielement neutron activation analysis of geological samples by means of neutron multiplier. It is shown that due to the small number of neutrons flow using the ordinary relative method it is impossible to conduct multielement activation analysis of geological samples when its elemental content is within the limits of clarke. The use of original polycomparator method makes possible to measure the content of 22 elements, in error by no more than 20%.

Key words: neutrons multiplier, activation analysis.

Physics

N.Bagdavadze, V.Dundua, Ts.Kvirikashvili, P.Imnadze, V.Kintsurashvili

Neutron-Activation Analysis of Iodine in Vegetable Samples Using "Breeder-1"

Presented by Member of the Academy G.Kharadze, August 20, 2000

Abstract. We have elaborated g-spectrometric method of instrumental neutron-activation analysis (INAA) of iodine determination in vegetable biomaterials. The essence of this method is in g-spectrometric measurement of radionuclide I128 analytical line (Eg=443 keV). Detection boundary and sensitivity equals 5x10-5 g and 2x10-4 g/kg in dry weight. The method was used to measure iodine content in tea samples.

Key words: neutron-activation analysis, g-spectrometry, system "breeder-1", g-spectrometric measurement of I128.

Astronomy

Ts.Khetsuriani, M.Gigolashvili, E.Khutsishvili, L.Geonjian, D.Japaridze, Corr. Member of the Academy R.Kiladze, G.Salukvadze, Z. Kapanadze, A.÷kten, T.÷zişik, H.GŁlsecen

Corona Observation in Elaziğ during the Total Solar Eclipse of August 11, 1999

Presented February 1, 2000

Abstract. The total solar eclipse of 11 August 1999 was observed by the joint expedition of Georgian and Turkish astronomers. The aims of observations and the description of the used observational equipment are presented. Observational material is characterized. Some preliminary results of treatment are given.

Key words: corona, total solar eclipse.

Geophysics

Z. Kereselidze, N. Todua

On the Stability of the Magnetic Structure of the Stagnation Zone to the Magnetosphere

Presented by Corr. Member of the Academy T. Chelidze, December 28, 1999

Abstract. In the present work the stability of the magnetic structure of the stagnation zone to the magnetosphere is carried out and estimation of magnetohydrodynamic (MHD) waves spectrum in this region is done.

Key words: stagnation zone, solar wind, magnetosphere.

Geophysics

T. Matcharashvili, Corr. Member of the Academy T. Chelidze, V. Abashidze,
Z. Javakhishvili

Evidence for Deterministic Chaos in Earth,s Crust Tilt Dynamics

Presented April 4, 2000

Abstract. In the present study, in order to make quantitative evaluation of the Earth,s crust dynamics, we have investigated sequences of tiltmeters hourly measurement data sequence for 12 years. Considered time period includes 8 years before and 4 years after beginning the filling of the Engouri power station reservoir.

It was found that Earth's crust tilt dynamics for all considered time periods is a deterministic chaotic process, having positive maximal Lyapunov exponent and low correlation dimension. It means that the process of tilt generation is predictable, at least in sense of their pattern. According to our results the general nonlinear characteristics of tilt generation process has not been changed during dam building and reservoir filling conditions.

Key words: Earth,s crust dynamics, nonlinear analysis.

Analytical Chemistry

K. Grigalashvili, G. Supatashvili, S. Mamulia, T. Ptskialadze

Extraction- Photometric Determination of Zinc by
4-(2-pyridilazo)-Resorcinol

Presented by Member of the Academy G. Tsintsadze, April 11, 2000

Abstract. The conditions for extraction-photometric determination of zinc are established using zinc-4-(2-pyridilazo)-resorcinol-ethanol associate. In the presence of ethanol sensitivity and selectivity of the method significantly increase compared with pyridilazoresorcinol method. For the separation of interfering ions diantipyrilmethane (DAM) was applied. The combined extraction-photometric method is elaborated to separate interfering ions, concentrate and determine microamounts of zinc.

Key words: extraction-photometric method, zinc, 4-(2-pyridilazo)-resorcinol (PAR).

General and Inorganic Chemistry

Corr. Member of the Academy A. Shvelashvili , M. Tskitishvili , M. Kvitsiani,
N. Zhorzholiani , I. Beshkenadze, E. Miminoshvili, K.Amirkhanashvili

Synthesis and Crystal Structure of MgF2 .11H2O

Presented november 30, 1999

Abstract. The roentgeno-structural analysis of MgF2.11H2O crystal structure, where F is the deprotonated molecule of sulfadimetoxine is synthesized and studied. It is established that the inner sphere of the complex contains six water molecules that determine the octahedral structure of the compound, and the outer sphere of the complex comprises sulfadimetoxine molecules [ Mg(OH2)6]F2 . 5H2O.

Key words: coordination compounds, sulfadimetoxine, synthesis, roentgenostructure.

Organic Chemistry

A.Zirakishvili, N.Makharashvili, Sh.Samsoniya

Synthesis of Benzimidazole Substituted Phenylhydrazones on the Basis of the Acetophenone Derivatives

Presented by Corr. Member of the Academy L.Khananashvili, December 28, 1999

Abstract. On the basis of p-aminophenylbenzimidazole new hydrazones are synthesized. Influence of electronoaccepting and electron-donating groups on chemical and spectral properties of the obtained compounds is investigated.

Key words: benzimidazole, acetophenone, condensation, hydrazone, diazotation, o-phenylenediamine.

Physical Chemistry

D. Ioseliani, R. Zedgenidze, I. Borisovitch, G. Antoshin, G. Chkheidze

Catalytic Activity of Iron Containing Y, L, M, and E Zeolites in Oxidation Reaction of Carbon Oxides by Nitrogen Oxide

Presented by Member of the Academy T. Andronikashvili, December 28, 1999

Abstract. The Fe-zeolites activity in the CO+NO reactions was researched with regard to applied methods of iron input and preliminary processing of the samples. Based on the conducted works there were made the following conclusions. The Fe-zeolites prepared by (Fe(CO)5) vapor adsorption method are more active than those of modified by ion exchange method; Analysis of X-ray-photo-electronic (XPE) spectra revealed that Fe cations with intermediate valent state are more active than those with high oxidation number. The preprocessing of Fe-zeolites in H2 area causes increase of samples catalytic activity.

Key words: ion exchange, adsorption, X-ray photoelectronic spectroscopy, thermal processing, satelite line, effective charge of cations.

Physical Chemistry

Ts.Goliadze, G.Makharadze, G.Supatashvili, A.Khaiauri

Adsorption of Cu(II) and Mn(II) in Humic Acids

Presented by Member of the Academy G.Tsintsadze, November 2, 1999

Abstract. Kinetics of adsorption of Cu(II) and Mn(II) in humic acids was investigated. It was established that adsorption began immediately and reached constant value after ten minutes. It was revealed that adsorption did not proceed at pH=1. Adsorption was initial at pH=2 and reached maximum value at pH5. It has been suggested that adsorption proceeds by ion-exchange mechanism, and also because of complexation. Adsorption capacity equals 12 and 35 mg/g for manganese and copper, respectively.

Key words: adsorption, humic acid, manganese, copper.

Electrochemistry

G. Agladze, N. Koiava, N. Nioradze, N. Pashalishvili

The Influence of Mass Transport on the Chloride-Ion Oxidation in the Three-Dimensional Electrodes

Presented by Corr. Member of the Academy J. Japaridze, November 16, 1999

Abstract. The influence of particles diameter of packed bed electrode and solution flow rate on the chloride-ion oxidation in the three-dimensional electrode was investigated. The mass transfer characteristics of electrochemical system were calculated and the intensity of chloride-ion oxidation on the bases of these parameters was determined.

Key words: three-dimensional electrode, space-time yield, mass transport coefficient.

Geology

M. Otarashvili, V. Iaroshevich

The Source for Producing Water, Sulfur and Carbon in the
Mineral-Forming Fluids of the Kafan Ore Region

Presented by Corr. Member of the Academy G. Zaridze, December 28, 1998

Abstract. Isotopic studies carried out within the Kafan ore field determined that deep-seated magmatogenic source took part in the formation of mineral-depositing fluids.

Key words: meteoritic standard, generation, fluid, magmatogenic.

Geology

V. Gugushvili, I. Hart, M. Natsvlishvili, R. Akhvlediani

Origination of the Gold Mineralization and Wall Rock Alteration at the Sakdrisi Deposit (Bolnisi Mining District)

Presented by Corr. Member of the Academy M.Topchishvili, February 1, 2000

Abstract. The new prospecting criteria and age of gold origination is determined. The chemical composition of fluid inclusions from the mineralized zones indicates, that gold generation is related with alkaline carbonic acid solutions. The optimal conditions for gold mineralization coincides with the hydrothermal activity, which caused the formation of siderite-hydrobiotite bearing rocks formed at 240-250 0C.

Key words: gold mineralization, hydromica, siderite.

Geology

B. Tutberidze

Evolution and Geodynamic Conditions of the Manifestation of Neogene-Quaternary Volcanism of the Caucasian Segment within the Bounds of Georgia

Presented by Member of the Academy I.Gamkrelidze, November 24, 1999

Abstract. Geological and geophysical specific signs of the Transcaucasian transverse uplift and the peculiarities of magmatism revealed in it refer to the riftal origin of the uplift.

Key words: volcanism, Georgian block, Neogene-Quaternary, andesite, Pleistocene, calcalkaline.

Computer Sciences

N. Kutsiava

Determination of Some Reliability Indices of the Designed
Chemical Plant Equipment

Presented by Corr. Member of the Academy A. Prangishvili, December 29, 2000

Abstract. Here is discussed the method of calculation of coefficient and function of readiness of high unit power chemical plant subjected to two types of failures (wear-out and random) and detected in the moment of occurence by a reliable system of continuous control.

Key words: failure, renewal, reliable index, control.

Soil Science

Corr. Member of the Academy T.Urushadze, N.Mosidze,A.Urushadze

Humus State of the Alluvial Soils of the Mtkvari River Valley

Presented March 14, 2000

Abstract. Using one and the same scheme of investigation the main characteristics of the alluvial soils of the Mtkvari River Valley have been studied and some valuable information about their humus state has been obtained.

Key words: alluvial soils, humus, fulvic and humic Acids.

Agricultural Chemistry

J.Tsotsonava

Effects of Long-Term Application of Potassic Fertilizers on the Expansion of Mandarine Root System

Presented by Member of the Academy G.Tsintsadze, December 5, 2000

Abstract. We have established that all forms of potassic fertilizers (KCl, K2SO4 and K2SO4.MgSO4) have a positive action on growth and expansion of the root system of mandarine Citrus unschiu L. According to our data K2SO4.MgSO4 is the most preferable among different forms of potassic fertilizers.

Key words: potassic fertilizers, mandarine.

Plant Physiology

I.Matitashvili, E.Ketskhoveli

Determination of Carotenoids Content in Spontaneous Wheat-Rye Amphidiploids and their Parental Forms

Presented by Corr. Member of the Academy N.Nutsubidze, August 8, 2000

Abstract. Determination of carotenoids amount indicates that all the researched triticales overcome parental forms by the number of pigments in flag-leaf, awns and ear scales in all phenological phases. Spontaneous wheat-rye amphidiploids accumulate and preserve till the end of vegetation more carotenoids than their parental forms, especially hybrids of sixth generation F6'2 (T.paleocolchicum x S.kuprijanovii).

Key words: triticale, carotenoids, flag-leaf.

Botany

I. Murvanishvili

Micromycetes alongside the Oil Pipeline in Saguramo State Reserve

Presented by Corr. Member of the Academy G. Nakhutsrishvili, November 26, 1999

Abstract. Micromycetes - disease causative fungi for major participants of the oak forests and xerothermic shibliak type shrubwoods are studied along the oil pipeline section corridor. Biocorrosion bioagents are given attention as well.

Key words: oil pipeline, micromycetes, host plants, biocorrosion agents.

Botany

L.Kobakhidze, Z.Gamtsemlidze, Ts.Mikatadze-Pantsulaia, M.Eristavi

Sexual Reproduction of Lilium Szovitsianum Fish.et Ave-Lall.(Liliaceae)

Presented by Corr.Member of the Academy G.Nakhutsrishvili, December 21, 1999

Abstract. Proceeding consistent phases of growth, development and flowering of Lilium szovitsianum Fish. et Ave-Lall. spread in the Caucasian highlands and influenced by strong anthropogenic force was studied. Processes of pollination - fertilization, seed formation, potential and real production were also investigated.

Key words: L. szovitsianum, ovules, flowers, pollen, ovary, endosperm, seed.

Genetics and Selection

J. Kapanadze, I. Guledani, G. Okruashvili

Growth and Development of Plants at High CO2 Concentrations

Presented by Corr. Member of the Academy D. Jokhadze, May 23, 2000

Abstract. At high CO2 concentrations (0.09%) during vegetation period Cucumber(Cucumis sativus L.) was damaged by 5 points, fruits of Ecballium elaterium (L.) A. Rich became bitter. No morphological damages were marked in cases of carrot and beet. But tetraploid varieties of the latters produced 1.5 times greater vegetative mass and revealed higher tolerance than their diploid forms.

Key words: global warming, permanent intervention, CO2 utilization.

Human and animal physiology

N. Doreulee, M. Datunaishvili, Member of the Academy T. Ioseliani, H. Haas

Excitability of Striatal Neurones is Changed in eNOS
Mutant Mice

Presented November 9, 1999

Abstract. Synaptic excitability of striatal neurones was tested on slices from mice, where eNOS was genetically disrupted. It was found that the threshold for the extracellularly recorded field responses to cortical stimulation were significantly lower in slices from eNOS-/- mice (68 Ī 9mA) as compared with wild type animals (107 Ī 14mA). At the same stimulation strength the field potential amplitude was significantly higher in slices from eNOS-/- mice. Bath application of sulpiride, an antagonist of D2 dopaminergic receptors, but not N-nitro-L-arginine (NL-Arg, blocker of NOS) mimicked the result of eNOS gene knock-out, indicating that deficit of eNOS during development may affect glutamatergic transmission in corticostriatal pathway through the dopaminergic modulatory system.

Key words: eNOS, knock-out mice, striatum.

Human and animal physiology

M. Khomeriki, N. Lomashvili, M. Malania, M. Sharikadze

The Georgian System of the Terms of the Basic Colours and
E. Hering's Theory of Colour Opponency

Presented by Member of the Academy T. Oniani, October 26, 1999.

Abstract. Using list experiment it is ascertained that in the Georgian language the terms of the six basic colours red, yellow, green, blue, black and white are singled out. This must be a linguistic assertion of E.Hering's theory of colour opponency.

Key words: colour terms, Georgian language, Herin's theory.

Human and animal physiology

I.Intskirveli, M.Roinishvili

Behavioral Evidences for Color Constancy in the Guppies

(Poecilia reticulata)

Presented by Member of the Academy T.Ioseliani, December 28, 1999

Abstract. Direct behavioral experiments have shown that the guppies (Poecilia reticulata) possess a constant color perception ability. Unless functioning of this mechanism of the color vision, it would be impossible to execute the color-recognition oriented behavioral acts, such as courtship behaviors, mating preference, etc.

Key words: color constancy, fish, guppy, behavior.

Human and animal physiology

I.Gvilia, Member of the Academy T.Oniani, N.Darchia, E.Chijavadze,

N.Dabrundashvili, I.Rukhadze

Influence of Relatively Short-Lasting Total Sleep Deprivation on the Structure of Sleep-Waking Cycle in the Rats

Presented November 16, 1999

Abstract. The data presented in the paper indicate that as a result of relatively short-lasting total sleep deprivation the acute deficit of the slow-wave sleep only develops in the rats, and its post-deprivation compensation reveals itself in the sharp rebound.

Key words: rats, total sleep, slow-wave sleep, paradoxical sleep, rebound, deprivation.

Human and Animal Physiology

G.Todua

Electrophysiological Study of Direct Input from Lateral Nucleus to Central Nucleus of the Amygdaloid Complex

Presented by Member of the Academy T.Oniani, December 28, 1999

Abstract. Single unit responses were recorded extracellularly from central nucleus (CN) of the amygdaloid complex in cats, immobilized with ditiline. Lateral nucleus (LN) stimulation evoked responses in 52.27% of the units population tested. The majority of CN units were excited. Stimulation of LN activated nuclear cells orthodromically and transsynaptically, as judged from fluctuation in the latency and failure in response to high frequency stimulation. Among activated units 44.18% responded short latency. The data support the existence of a monosynaptic pathway from LN to lateral part of the CN.

Key words: lateral nucleus (LN), central nucleus (CN), unitary response, latency.

Human and Animal Physiology

I. Kobaidze, Member of the Academy T. Ioseliani, L. Khuchua, E. Saralidze

On the Bioaminergic Innervation of the Visual System

Presented December 28, 1999

Abstract. The effect of electric stimulation of Locus coeruleus and the raphae dorsal nucleus on the visual system has been studied. In most cases Locus coeruleus evokes activation of neiron discharges and increases the amplitude of the primary responses, especially in a negative phase. Dorsal nucleus of the raphae has a contradictory effect.

Key words: visual system, Locus coeruleus, gineculatum laterales, raphae nucleus.

Human and animal physiology

Ts. Suknidze

Experimental Analysis of some Manifestations of Brain
Self-Regulatory Activity

Presented by Member of the Academy M.Khananashvili, October 19, 1999

Abstract. The experiments were conducted in dogs, in an experimental room, in the conditions of free behavior using the method of delayed reactions to sound conditioned signals. In different experiments the conditions were changed: complication or simplification of the task (delayed reactions), forced limitation of movement, use of cavinton (preparation improving brain blood circulation).

The research reveals that self-regulation of the brain tonus, its homeostasis occurs through proprioceptive impulsation observed during motor activity.

The tests in which cavinton was used, have shown that the preparation causes rapid restoration of the brain functional state (tonus), that is why its use intensifies brain self-regulatory activity.

Key words: self-regulation, delayed reaction, motor activity, proprioceptive impulsation.

Biochemistry

I.Chkhikvishvili , G.Kharebava

Quantitative Determination of Chlorogenic Acid by HPLC
in Different Varieties of Apples

Presented by Corr. Member of the Academy N.Nutsubidze, October 26, 1999

Abstract. The content of chlorogenic acid in fruits of six commercially available Georgian apple varieties was studied by HPLC. Among different kinds of apple fruits the Georgian variety of red apple "Kekhura" accumulates the greatest amount of chlorogenic acid, which makes 2.61mg per 100ml of juice and corresponds to 0.032% in the pulp.

Key words: apple fruits, chlorogenic acid (CGA), HPLC.

Biochemistry

E.Chikvaidze, I. Kirikashvili, T. Gogoladze, L. Chikvaidze

Ternary Complex Albumin - Mn(II) - Bilirubin and Investigation of Gallstones by ESR

Presented by Corr. Member of the Academy N. Aleksidze, December 15,1999

Abstract. Paramagnetic consistence of gallstones has been studied by ESR method. It is shown, that in black and brown pigment stones, basically the ESR signals from the Cu(II) and Mn(II) complexes, also the free radical one from bilirubin are observed. In cholesterol gallstones only the freeradical signal is observed. It is suggested that in the formation of gallstones the metalcomplexes could be important.

Key words: albumin-Mn(II)-bilirubin complexes, ESR method, jaundice, gallstones

Biochemistry

A.Kalandiya, M.Vanidze, S.Papunidze, I.Chkhikvishvili, A.Shalashvili

Flavonols from Chinese Actinidia (Actinidia chinensis Planch.) Fruits

Presented by Corr.Member of the Academy N.Nutsubidze, September 9, 1999

Abstract. Flavonols from fruits of chinese actinidia (Actinidia chinensis Planch.) cultivated in Georgia have been studied. By the methods of polyamid and silicagel column chromatography kaempferol-3-L-rhamnoside (afzelin), kaempferol-3-D-glucoside (astragalin), quercetin-3-L-rhamnoside (quercitrin), quercetin-3-D-glucoside (isoquercitrin) and quercetin-3-D-gluco-L-rhamnoside (rutin) were isolated and identified. Their identification was carried out by UV spectroscopy and physicochemical methods.

Key words: flavonols, fruits, Actinidia chinensis Planch.

Microbiology and Virology

L.Amiranashvili, M.Buadze, T.Tsotsoria, N.Gagelidze, L.Thinikashvili, E.Khachapuridze, G.Daraselia

Characterization of Peptidolipids in Mycobacteria and Rhodococci

Presented by Corr. Member of the Academy M.Gordeziani, November 2, 1999

Abstract. Peptidolipid composition of mycobacteria and rhodococci was studied. It was established, that peptidolipids amount towards dry biomass and total lipid fraction varies in wide range - from 0.7 to 9.4% and 7 - 38.6%, correspondingly. Similarity coefficients between the species and the strains of one species in mycobacteria and rhodococci were counted with regard to componental composition of peptidolipid fractions and the quantitative content of each component. Taxonomic dendrogram was drawn on the basis of the obtained similarity coefficients. The possible usage of peptidolipid composition as one of the chemotaxonomic criterions in systematics of mycobacteria and rhodococci was established.

Key words: mycobacteria, rhodococci, peptidolipids, similarity coefficient, chromatographic mobility, taxonomic dendrogram.

Microbiology and virology

Z. Lomtatidze, T. Shiukashvili, G. Aneli, K. Mamulashvili

Fatty Acids of Cell Wall Lipids of some Actinomyces

Presented by Corr. Member of the Academy M. Gordeziani, November 9, 1999

Abstract. The qualitative content of total lipids and fatty acids of cell wall lipids of some Actinomyces have been studied. As it has been established, the investigated Actinomyces differ by studied indices, which we assume is responsible for their stability to silicoorganic substances.

Key words: Actinomyces, cell wall, lipid, saturated fatty acid, unsaturated fatty acid, coefficient of saturation.

Microbiology and virology

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

Effect of Azospirillum on the Growth and Supply with Nitrogen of Zea mays

Presented October 5, 1999

Abstract. The effect of Azospirillum on different sorts of Zea mays has been studied. It was revealed that inoculation with Azospirillum increased crop capacity of plants. The best results were obtained with nitrogenous fertilizer in low dose (50 kg of nitrogen per ha), that increased the number of Azospirillum on the plant roots and its nitrogen-fixing activity. High dose of nitrogenous fertilizer (200 kg per ha) negatively affected Azospirillum and its nitrogenous activity resulted in decreasing of crop capacity of plants.

Thus, the low dose of nitrogen stimulates plant growth and metabolism and it also promotes the association of bacteria with host plants. The effect of inoculation is intensified due to the association.

Key words: Azospirillum, nitrogen fixation, nitrogen-fixing activity, growth of Zea mays, nitrogenous fertilizer.

Microbiology and virology

M. Gurielidze, I. Khokhashvili, D. Pataraya, T. Devdariani

Physico-Chemical Characteristics of Antimicrobial Substances Produced by Streptomyces sp. 114 Strain

Presented by Member of the Academy G.Kvesitadze, October 12, 1999

Abstract. Actinomycetes widely spread in southern region of the Caucasus have antagonistic properties against phytopathogenic fungi - Rhizoctonia sp., Fusarium solani, F. oxysporum. Among actinomycetes-antagonists the highest antimicrobial activity was found in Streptomyces sp.114 strain, isolated from thermal water of Khobi, Georgia. Antimicrobial substance from this strain has exogenic as well as endogenic nature. It is characterized by activity in wide range of pH indices (pH 2-10) and by thermostability, hydrophility, resistance to oxygen.

Key words: actinomycete-antagonists, phytopathogenic fungi, antimicrobial substance, extraction of antimicribial substance.

Microbiology and Virology

N. Ramishvili, M. Jgenti, M. Samadashvili, G. Badridze

Influence of Inoculation and Different Doses of Mineral Nitrogen on Soybean Productivity

Presented by Corr. Member of the Academy N. Nutsubidze, December 7, 1999

Abstract. The affect of different doses of inorganic nitrogen and local strains of nodule bacteria separately and together in field and sand cultures on soybean productivity and assimilates transport has been studied. It was revealed, that inoculation with different strains of Rhizobium japonicum positively affected plant development and yield structure. Also positive results were obtained while combining low or middle doses of nitrogen with bacteria.

Key words: mineral nitrogen, inoculation, photosynthesis, assimilates transport, nitrate reductase, productivity, soybean.

Zoology

Corr. Member of the Academy I. Eliava, M. Kuchava

Labronemella georgiensis sp. nov. (Nematoda, Dorylaimida) from Eastern Georgia.

Presented March 14, 2000

Abstract. The new soil nematode species from order Dorylaimida (Nematoda) is described. The measurements of females and males are given. The Key of species genus Labronemella (based on Andrassy, 1985) is proposed.

Key words: Nematoda, Labronemella, Odontostil, supplement.

Cytology

M. Labadze

Some Ultrastructural Indices of Oligodendrocytes of Dog's Spinal Cord and Spinal Ganglia

Presented by Corr. Member of the Academy T. Dekanosidze, December 9, 1999

Abstract. Two main forms of oligodendrocytes those with osmophilic and light cytoplasm have been revealed by electron microscopy.

Key words: oligodendrocytes, astrocytes, microgliacytes, blood-neuronal interrelations.

Experimental Medicine

M. Janiashvili, T. Matcharashvili, G. Alpaidze, Z. Abalaki

Analysis of Fine Structure of Heart Rate Variability in Subjects with Hypertension Using Wavelet Transformation

Presented by Member of the Academy T.Oniani, December 28, 1999

Abstract. In this work we have used linear tests of time series analysis for evaluation of further details of temporal variability of human heart at different stages of hypertension. We have used the wavelet transformation to reveal structure in the R-R interval sequences localized to a particular time scale and temporal position. The obtained results provide evidence that despite similarity of statistical properties and distribution in frequency domain the fine structure of R-R intervals distribution in time - frequency domain is quite different in healthy and hypertension groups.

Key words: heart rate variability, cardiology, wavelet transformation.

Experimental Medicine

Z. Demetrashvili, R. Magalashvili, E. Rapava, N. Tkhilava, L. Labauri

Changes Peculiar to Acute Appendicitis of Erythrocytes Surface under the Action of Lectin LPM40-80

Presented by Corr. Member of the Academy T. Dekanosidze, August 23, 1999

Abstract. Peculiarities of the kinetics of erythrocytes lysis have been studied in 45 patients diagnosed with acute appendicitis. Among them are 25 cases of destructive appendicitis and 20 of catarrhal. The alterations marked in erythrocytes membrane are clearly observed by adding lectin LPM40-80 and differ from each other during catarrhal and destructive forms. The obtained results can be used in diagnostics and post-operative period in order to evaluate the adequacy of the treatment.

Key words: acute appendicitis, erythrocyte, lectin.

Palaeobiology

I. Shatilova, L. Rukhadze, N. Mchedlishvili, M. Kipiani

On Stratigraphical Subdivision of Middle Pontian Deposits of Western Georgia Based on the Pollen Data

Presented by Member of the Academy L. Gabunia, September 6, 1999

Abstract. New pollen records from the Middle Pontian deposits of Western Georgia are cited. A proposed subdivision of pollen zones and subzones is based on the development stages of vegetatation and climate restored with the landscape-phytocoenotical method.

Key words: palynology, Middle Pontian, Western Georgia, vegetation, climate, stages of development, pollen zones.

Ecology

S.Lashkareishvili, L.Tsiskarishvili, M.Tsiskarishvili

Plankton Primary Production of Tkibuli Reservoir

Presented by Corr. Member of the Academy I.Eliava, April 18, 2000

Abstract. We report on plankton primary production (A and SA) and destruction (R and SR) seasonal dynamics of Tkibuli water pond. As it is apparent A and R are maximum in summer and minimum in late autumn and winter. In the upper layer of the water under the solar radiation the process of photosynthesis reduction takes place. According to SSA-s quantity the Tkibuli water pond belongs to the type transforming from mezotrophic phase into law eutrophic one.

Key words: phytoplankton, photosynthesis, primary production and destruction, transformation.

Pedagogy

N. Makaradze

Educational and Teaching Hypothetic Content and its Formation Principles in Elementary School

Presented by Corr. Member of the Academy G.Sharadze, January 30, 2000

Abstract. Scientific principles of formation of elementary school teaching and educational content and standard documents defining this content on the first stage of the basic education have been discussed.

Key words: content of education, state educational standard, teaching plan, invariant and variant blocs.

History

G.Guledani

Israel and Occupied Territories - The Analysis of Delayed
Dialogue Factors

Presented by Member of the Academy K. Tsereteli, November 16, 1999

Abstract. The article studies Jewish state's regional policy shift towards the Military Power Factor, Arab reaction to it and impossibility of peace negotiations after the 1967 June war.

Key words: Six Day War, peace process, occupied territories, Middle East.

History of Art

S.Kasyan

Mensural Rhythm as Characteristic Phenomenon of ars nova

Presented by Corr.Member of the Academy P.Zakaraya, June 28, 1999

Abstract. We have studied the peculiarities of philosophic and aesthetic category of identity in mensural system ars nova. It was established that the leading principle of mensural system is identical correlations.

Key words: mensural system, motet.

Philology

M.Iamanidze

About One of the Essays by Charle de Payssonnel

Presented by Corr.Member of the Academy G.Sharadze, December 15, 2000

Abstract. New information about Georgia is received from earlier unknown essay of French lawyer, archaeologist and political figure of XVIII c. Charle de Payssonnel. The essay has been first translated into Georgian.

Key words: travelling, oriental countries, France, Georgia, Persia.

Philology

G.Meskhi

Speech Leitmotifs in "Rheingold" by Richard Wagner

Presented by Member of the Academy K. Tsereteli, August 3, 1998

Abstract. Along with musical leitmotifs found in Wagner's opera librettos, the so-called "speech leitmotifs" are also observable. Their study shows Wagner as a writer.

Key words: speech leitmotifs, composite consonants, occult symbol.