Summary
On the kinetics of dynamic
quantum systems interacting with the boson field: Part II. Evoluiton equations
for correlation and Green functions
Kotiya B.A.
Georgian Technical University
By
the method of ordered operators, new exact generalized quantum evolution
(kinetic) equations were derived for equilibrium two-time correlation functions
and Green functions for quantum dynamic system interacting with the boson
(phonon) field (thermostat). (The method based on the use of chronological and
antichronological T-products is developed).
The
random phase approximation (RPA) is not used in derivation of these equations,
and the technique of elimination of boson (phonon) amplitudes is of
considerable importance. The collision integrals of these equations contain
both the members describing the evolution of real correlations and the
evolution members of initial (precollision) correlations determined by the
interaction of the subsystem with the boson thermostat at the initial moment of
time. Various alternative approaches to the analysis of the dynamic subsystem
behavior based on the derived equations are proposed.
To the
second-order approximation of the theory of perturbation in relation to the
interaction of the subsystem with the thermostat, generalized quantum kinetic equations
with eliminated boson amplitudes were derived for correlation functions from
dynamic variables of the subsystem of both Markovian and non-Markovian type,
which contain explicit evolution members of precollision correlations.
There
is also discussed the application of the derived generalized quantum kinetic
equations for equilibrium two-time correlation functions in various models of
quantum dissipation systems of the physics of condensed media – the
theory of polaron, the theory of motion of quantum Brownian particle etc.
Keywords: ordered operators,
correlation functions, Green functions, generalized kinetic equations.
SUMMARY
TRANSMISSION
OF THE PLANE ELECTROMAGNETIC WAVE THROUGH THE RADOME SANDWICH WITH THE PERIODIC
GRATING
Asanidze
A.V., Kevanishvili I.G., Kotetishvili K.V., Chuntishvili I.I. and Chikhladze
G.G.
Georgian Technical University
An electrodynamic
problem of transmission of the plane electromagnetic wave through the
dielectric sandwich with the periodic grating, placed at some distance from the
layer in the lighted area, is strictly solved. The transmission coefficient of such a system
for the main wave is calculated. It is shown that, at the points of
Wood’s anomaly, where the ratio between the period of the grating and the
wavelength is a natural number, the presence of the grating does not affect the value of the transmission
coefficient of the insulated dielectric sandwich.
Keywords: electromagnetic
plane, wave, radome, grating.
SUMMARY
scattering of wave H10
on the system of cylinders located in different cross-sections of a rectangular
waveguide
Dekanosidze Sh.V., Kevanishvili I.G. and Kekelia G.V.
Georgian Technical University
A
problem of scattering of the plane electromagnetic wave on the system of two
metallic or dielectric cylinders located in different cross-sections of a
rectangular waveguide in parallel with its narrow walls is considered. Using
the method of mirror images and realizing the continuity and smoothness
conditions of the cylinder surfaces with invoking the electrodynamic analogy of
the Green theorem, a dial infinite set of linear algebraic equations in
relation to unknown coefficients of multifield spectra scattered by each
cylinder was obtained. The analysis of metric elements and free terms showed
that the obtained set of equations is the second-order Fredholm one. Therefore
it was computed by the reduction method with the help of a computer.
Keywords: rectangular
waveguide, cross-section, system of
cylinders, wave scattering.
Summary
ELECTRODYNAMIC
ANALYSIS AND CALCULATION OF THE ANTENNA RADOME FORMED OF THE PERIODIC GRATING
AND DIELECTRIC LAYERS
Kevanishvili
G.Sh., Kevanishvili I.G., Kotetishvili K.V., Chikhladze G.G. and Chuntishvili
I.I.
Georgian
Technical University
The
electrodynamic analysis of the antenna radome formed of two tightly hold
dielectric layers with different dielectric permittivity, one of them containing
the periodic grating formed by two infinitely long conductive cylinders, is
suggested.
The
conditions at which the power of the electromagnetic field passed through the
radome reaches its maximum value, which,
in its in turn, provides the optimal electrodynamic working regime of the
radome, are investigated.
Keywords: radome,
dielectric layer, grating, electrodynamic analysis.
SUMMARY
ELECTRODYNAMICS
OF THE CYLINDRICAL ANTENNA
RADOME
WITH THE COAXIAL WIRE GRATING
Kevanishvili
G.Sh., Kevanishvili I.G., Kotetishvili K.V., Chikhladze G.G. and Chuntishvili I.I.
Georgian
Technical University
The
theory of the cylindrical sandwich radome is stated for the case of arrangement
of the coaxial metal periodic grating within the dielectric layer. The
analytical relations for calculation of the geometric parameters of the radome
at given values of the relative dielectric permittivity of the layer and the
wavelength are derived.
Keywords: radome,
antenna, dielectric layer, transmission coefficient.
Summary
Radiation patterns of two dielectric concentric
spheres excited by a plane electromagnetic wave
Dekanosidze
Sh.V., Zamtaradze G.G., Kvatadze Z.A., Kekelia G.V. and Kipiani D.O.
Georgian
Technical University
A problem of construction of the radiation
pattern of two dielectric concentric spheres excited by a plane electromagnetic
wave is considered. It is demonstrated that the absolute maximum of the
radiation intensity falls basically on the direction of the geometric shadow,
but at specific parameters the deflection from those direction takes place.
Keywords: radiation pattern, plane wave, dielectric
concentric sphere, excitation.
SUMMARY
Near fields of diffraction of
two cylinders located in one cross-section of a rectangular waveguide
Dekanosidze Sh.V., Kvatadze Z.A. and Kekelia G.V.
Georgian Technical University
The
near fields of diffraction of a plane electromagnetic wave on two cylinders
located in one cross-section of a
rectangular waveguide were studied. The lines of equal amplitudes and phases
were constructed. Those lines give an estimate of the field distribution in the
waveguide, show the location of local and absolute maximums (minimums), help to
find the vortex zone of electromagnetic energy, and allow the determination of
the direction of wave motion.
Keywords: rectangular
waveguide, near fields of
diffraction, cross-section lines of equal amplitudes.
summary
analysis
of the patterns of the scattered field at diffraction of the plane
electromagnetic wave being incident at an angle to the dielectric cylinder axis
Dekanosidze Sh.V., Kekelia G.V.
and Kabisashvili D.G.
Georgian Technical University
The
analysis of the patterns of the scattered field of the plane electromagnetic
wave being incident at an angle to the dielectric cylinder axis was performed
at different permittivity, relative radii of the cylinder and angles of
incidence. The investigation results are presented.
Keywords: pattern, angle of
incidence, plane electromagnetic
wave, dielectric cylinder, scattered field, analysis.
SUMMARY
A method of determination of
interval and maximum reliability indices
Mikadze I.S.,
Arabuli N.V. and Chachua D.R.
An original method of determination of interval and
maximum indices of availability of complex units (equipment, devices, elements
etc.) is suggested. A mathematical
model of the operation of the service system (of devices, data transmission
channels etc.) with built-in instrumentation control was constructed. The presented model
consists of two parts: basic and reference. The indication of serviceability of
the basic part is the signal of a certain level at its output which is
continuously detected by the supervisory
equipment. The supervisory equipment failures are checked periodically.
If the supervisory equipment failure has preceded the basic element failure, those
failures can be revealed and eliminated only at periodic checks. The flows of
failures of the supervisory and basic equipment obey the Poisson law.
Keywords: reliability index,
distribution function, data transmission channel, service system.
SUMMARY
Root locuses in the
theory of catastrophes
Kotrikadze
O.G.
The analysis of the specific features of potential
functions with the help of root locuses is considered by the example of
standard functions of deformation, the fold and “the gather”, and
nonstandard deformation. The locuses were constructed, the double critical
points and the extreme point of potential functions were determined. The
discriminant set of deformation parameters
was found. The root locuses constructed for catastrophes of the fold and
“the gather” are universal. The plane of deformation parameters is
divided into domains by homomorphic graphs of the potential function.
Keywords: theory of catastrophes,
root locus, fold, collapse, potential functions.
Summary
analysis of structural robustness using root locuses
Kotrikadze
O.G.
The procedure of synthesis of the correcting device
(CD) is considered, and the causes of inaccuracy of the obtained results are
shown. For maintaince of the desired stracture of the CD, the application of
root locuses is suggested. The efficiency of application of the suggested
method is demonstrated by the example of the differentiating RC circuit. The
values of the RC circuit parameters were determined with account for total
internal resistance of the input signal source.
Keywords: structural robustness,
root locus, correction, robustness compensation.
SUMMARY
Analysis of the catastrophe “dovetail” Using root
locuses
Kotrikadze
O.G.
The analysis of the “dovetail”
catastrophe was performed using root locuses of the derivative potential
function. The real double roots and the values of deformation parameters at
those points were determined. A family of root locuses at changes in normed
parameters was constructed. The plane of deformation parameters was divided
into domains, in each of which the graphs of the potential function were
homomorphic.
Keywords: theory of catastrophes,
dovetail, root locus, critical point, extremum.
Optimal
design of the bent-stretched circular plate with consideration for the
conditions of rigidity and durability
Beridze T.Sh.
Abstract.
The method of
calculation offered in this paper differs from the existing ones by the fact
that it allows accomplishment of calculations with given conditions of rigidity
and durability with high accuracy. The optimal design of the bent-streched
circular plate is presented.
Keywords: circular plate, optimal design, bending,
rigidity, durability.
Summary
On the
problem of designing of intellectual systems based on microcontrollers
Dadunashvili
The designing technique of intellectual systems on
the base of microcontrollers is considered by the example of direct current engine
control in the automobile antiskid device. The realization of the design
involves the following stages: the statement and the analysis of the task
solved by the system, its engineering interpretation and the development of the
block–diagram of the algorithm.
Keywords: microcontroller,
intellectual system, algorithm, graph.
A special case of
the arrangement of cuts
Pailodze N.R.
Abstract: The offered procedure of the account of cuts in a plate is the
generalization of the procedure of the account of cuts in a single-layered
plate, and it is based on introduction of special discontinuous functions,
singular functions and delta functions into the initial differential
geometrical dependences connecting the displacement vector components and the
components of tangential and bending strain.
Keywords: single-layered plate,
arrangement of cuts, special case, special functions.
Obtaining of the
Nano-Structured Ultrathin Membrane for the Purification of Liquid Gallium from
Impurities up to 8N
Kutelia E.R., Tsivtsivadze D.M. and Kutelia B.E.
Abstract. In this work there are
presented the results of complex investigation of the morphology, the chemical and phase composition, and the membrane features of the nanostructured ultrathin oxide skin obtained at self-organization in the process of oxidation of the concentrationally
laminated surface layer (~1nm) of the metal melt by the example of
Keywords: ultrathin, membrane, purification, nanostructure, liquid gallium.
THE
STRUCTURE OF TRANS-DIAQUA-BIS(3-HYDROXYBENZOYLHYDRAZINE)COBALT(II)
NITRATE TRIHYDRATE [Co(С7Н8О2N2)2(OH2)2](NO3)2∙3H2O
Miminoshvili
E.B., Miminoshvili K.E., Beridze L.A., Zazashvili S.R. and Ediberidze D.A.
There was studied the structure of compound
Co(m-HBH)2(NO3)25H2O, where m-HВН
= С7Н8О2N2 (3-Hydroxybenzoylhydrazine);
(а=56,150(6); b=20,045(2); c=7,893(2)Å, Fdd2,
Z=16, R(F)= 0,056).
The compound is formed of complex cation [Co(m-HBH)2(OH2)2]2+,
two anions NO3- (one of them is disordered) and three water
molecules. The geometric parameters of hydrogenic bonds have been
determined.
Keywords: complex compounds,
structure, hydroxybenzoylhydrazine, carbonic acid, hydrazide.
Summary
Investigation of the reaction of electron and hydrogen atom transfer
between triplets and diphenylamine
Kokrashvili
T.A., Shengelia M.A. and Kokrashvili A.T.
The results of estimation of the lifetime and radii
of ion-radical pairs formed at quenching of the triplets of substituted
p-benzoquinones with diphenylamine are presented. The rate constants of
electron and hydrogen atom transfer at quenching of the triplets of substituted
p-benzoquinones with diphenylamine decrease as the electron-acceptor ability of
quinone rises.
Keywords: triplet state, hydrogen
atom transfer, electron, p-benzoquinone, quenching.
Summary
The effect of solvent viscosity on the kinetics of quenching of the
Kokrashvili
T.A. , Shengelia M.A. and Kokrashvili A.T.
The solvent viscosity dependence of the rate
constants of quenching of the triplet state of anthanthrone by aromatic donors
of electron and hydrogen atom was obtained. The diffusive and kinetic
elementary stages of the quenching reaction were revealed, and the rate
constants of these stages were determined. The rate constant of hydrogen atom
transfer from phenol to the triplet of anthanthrone in a complex with the
hydrogen bond decreased at introduction of electronegative substitutes into the
phenol molecule.
Keywords: triplet state, quenching,
anthanthrone, solvent viscosity, kinetics.
SUMMARY
AUGER ANALYSIS OF THE
NANOCRYSTALLINE Ge:GeO2 FILMS
Jishiashvili
D.A., Eristavi B.G., Gobronidze V.V., Shiolashvili Z.N., Jishiashvili A.D.
and Makhatadze N.K.
Auger electron spectroscopy was used to investigate
the Ge:GeO2 film containing oxidized (Ge4+) and elemental
(Ge0) germanium nanocrystals. The quantitative analysis was
performed using the reference sample consisting of the Ge and GeO2
films deposited side by side with a sharp linear edge. The Auger signals of Ge
L3M45M45 were detected by scanning the surface of the reference
having a rectangular form. The Ge/GeO2 ratio in the analyzed
rectangular sample was previously changed by shifting the reference in the
direction orthogonal to the electron beam. The calibration curve connecting the
Ge0 and Ge4+ related peak area ratios with the real Ge
and GeO2 ratios in the reference sample was plotted. The Ge0/Ge4+
ratio measured for the Ge:GeO2 film of unknown composition was
compared with the calibration curve, and the real ratio of Ge/GeO2
was determined. It was established that the amount of Ge could be measured with
the accuracy of 3-4% for the films containing at least 15 at.% of Ge0. At lower Ge0
content, the inaccuracy increases up to 6-7 % due to the increased in the
density of atoms at the Ge nanocrystals.
Keywords: nanocrystalline films,
germanium, germanium oxide, Auger analysis.
SUMMARY
WATER TREATMENT OF THE
NANOCRYSTALLINE Ge:GeO2 FILMS
Jishiashvili D.A., Kutelia
E.R., Gobronidze V.V., Shiolashvili Z.N. and Makhatadze N.K.
The phase-separated Ge:GeO2
films, consisting of the amorphous GeO2 matrix and Ge nanocrystalsб,
were produced by magnetron sputtering. After water treatment of these layers,
the nanoporous films were formed. For the film containing 13
at.% of the excess germanium (Ge0), the average pitch sizes of 0.6 mm and
the pore length of 15 mm were
obtained. The etching rate of the film depends on the concentration of Ge0
and it decreases down to 8 nm/min for the film containing 25
at.% Ge0. The formation
of the nanoporous structure in the water-treated film is caused by the
segregation of phases due to the decomposition reaction GeO=Ge+GO2,
which takes place during the film deposition.
Keywords: nanocrystal, nanoporous
film, germanium dioxide, etching rate.
Summary
on a photon structure based on circular cylindrical capillaries
Chanturia G.F.,
Gaprindashvili H.I., Karakozov K.G., Kutaladze L.M., Tsaturov A.M.
and
Tatarashvili R.A.
A photon structure based on thin tubular cylindrical
rods (capillaries) was obtained, and its functional capabilities were studied.
The mechanism of operation of the photon structure is discussed.
Keywords: cylindrical lens, photon
structure, light diffusion.
Summary
The effect of thermodynamic parameters of the
process of hot molding on the properties of sintered metallic compositions
Loladze N.T., Tserodze M.P., Dzidzishvili Yu.G., Grdzelishvili G.Yu.,
Sharashenidze G.G., Tserodze O.M. and Myakisheva A.I.
The effect of pressure on the
processes of liquid-phase and solid-phase sintering in the Gu-Sn-Ni and Fe-Sn-X
systems under the conditions of hot molding was studied. A new design of press
mold provided a significant increase in the working pressure of the process (up
to 1200 kg/cm2). A decisive role of the pressure in the formation of
metallic composition structure at solid-phase sintering was revealed.
Keywords: hot molding, metallic composition, press mold,
sintering, thermodynamic parameters.
SUMMARY
Efficiency of the deformation, the moment and the capacity at
rolling in hexahedral and
Vashakidze
N.A. and Vashakidze G.A.
A new expression for determination of the effective
factor of deformation at rolling of rectangular strips with rectilinearly convex
side surfaces in hexahedral passes was derived.
The calculation formulae for determination of the
moment and the capacity of rolling were also derived for the case of changes in
the shape of rectangular strips with convex side surfaces in case-square and
hexahedral passes with tension.
Keywords: rolling, deformation,
efficiency, rolling moment, rolling capacity, hexahedral pass, case-square
pass.
SUMMARY
Determination
of contact pressure at rolling in
case-square and hexahedral passes with tension of the strip
Vashakidze А.S.
and Vashakidze G.A.
The calculation formulae of specific and complete
contact pressure at rolling of rectangular strips with rectilinearly convex
side surface with tension in case-square and hexagedral passes were derived.
The suggested expressions account for the effect of
the shapes of the strip and the
pass on the parameters of the rolling process.
Keywords: rolling, contact pressure,
rectangular strip, case-square pass, hexagonal pass.
SUMMARY
Nontraditional technology of fabrication of solar cell elements
Kekelidze
N.P., Tserelov A.A., Tserelov R.A., Mgebrishvili N.N. and Ermolov A.G.
Iv.
There was developed the technology of fabrication of
solar cell elements which differs from the traditional one by its simplicity,
elimination of complex, power-intensive equipment, and shorter production time.
As a result of implementation of the developed technology, reduction of the
solar cell cost by 50% is expected.
Keywords: solar cell, production
technology.
Summary
Calculation
of thermodynamic parameters of
ozone friendly refrigerants in the saturation area
Kekelidze N.P., Suladze S.B.,
Kvinikadze Z.V. and Davitaya Z.F.
Iv.
A relative method was used for calculation of the
thermodynamic characteristics of new ozone friendly refrigerants. As the
reference substance, R22 was chosen. The temperature dependence of the saturated
vapor pressure was deduced by interpolation of the empirical data for the reference
substance. The described method was tested on four alternative substances
having different properties. The comparison of the obtained results with the
data of other authors is given. It confirms that, for calculation of the
thermodynamic parameters of new substances, it is enough to know their critical
pressure and critical temperature, and that the described method works with
high accuracy in the entire range of saturated vapor, including the field of
the critical point.
Keywords: refrigerants,
thermodynamic characteristics, ozone, saturation area, calculation.
SUMMARY
ANALYSIS OF TWO DIGITAL
ALGORITHMS FOR REALIZATION of PID
controllers
Jokhadze P.D.
The comparative analysis of two methods of
proportional-integral-derivative (PID) controllers realization was carried out,
The advantages and drawbacks of these methods are shown. The simulation results
are given at maximum optimum parameters.The simulation was conducted in the
Simulink environment, using the Mathlab Software.
Keywords: digital algorithm, PID
controller, realization, analysis.
SUMMARY
CRYPTOGRAPHIC ALGORITHM FOR
ENCODING of THE TRANSMITTED DATA
Kutsiava V.A., Diakonidze K.D.,
Bochikashvili P.N. and Jokhadze P.D.
There is considered a cryptographic algorithm for
data block encoding, in which the original principle of bits displacement and
diffusion is used. The algorithm is symmetric and allows encoding the
512-bit-long blocks using a random key of the same length. In the formation of
the key, the encoded data take part. The proposed algorithm is robust and
fast.
Keywords: data transmission, encoding,
cryptographic algorithm.
SUMMARY
APPLICATION OF
FUZZY LOGIC IN CONTROLLERS
Jokhadze P.D.,
Bochikashvili P.N. and Kobakhidze F.D.
There is discussed a controller with digital
proportional-integral-derivative control (PID) and its self-adjustment
algorithm used for controlling the processes in the objects with initially
unknown variable parameters.
The principle of the controller adjustment based on
fuzzy-logic technology, where the dynamic adjustment of parameters reduces
static errors and eliminates transients caused by casual noise, is
presented. The considered
algorithm is simulated with applied software Mathlab..
Keywords: controller,
proportional-integral-derivative control, unknown parameters, fuzzy logic.
Summary
The Sloping shell of double curvature, freely supported on four
sides, under the action of radial load
Bibiluri M.V.
A theory of computation of sloping shells of double
curvature is suggested. The proposed theory is an attempt to eliminate complex,
awkward transformations and to develop a more convenient and easier
computational scheme for practical engineering computations.
Keywords: sloping shell, double
curvature, radial load, computational scheme.
Stability
of three-layer plates with cuts and holes
Kipiani G.O., Sokhadze A.P. and
Lezhava G.K.
Abstract. The method of calculation of
three-layer panels with cuts and holes, enabling one to take into account the effect of different
peculiarities on the distribution
of strains and moments with good accuracy, is presented.
Keywords: plate, tree-layer panel,
cut, hole, stability, filler.
Summary
Determination of the reliability characteristics of submarine
Junctions of power system mains
Gurgenidze
D.R.
The problem of determination of the reliability of
submarine junctions of power system mains is considered. Based on Markovian
processes, a set of Kolmogorov differential equations to be solved by the
analytical method was derived. The obtained relations allow the determination
of the time intervals between repairs of the submarine junctions of power system
mains.
Keywords: power systems, main,
submarine junction, reliability.
Summary
Optimal arrangement of centrifugal Pumps of the pipelines of power
systems
Namgaladze
D.P. and Gurgenidze D.R.
Based on the systematic approach, the optimal
arrangement of any number of main centrifugal pumps servicing a power system is
considered. On the base of combinatory reliability and the method of spatial
probabilities, in a particular
situation, there is compiled a list of all possible incompatible logic
probabilities, by adding up of which a total or a partial probability of
non-failure operation of the system is obtained.
Keywords: power system, pipeline,
centrifugal pump, optimal arrangement.
Summary
Determination of the path of oil stream spilled in the estuary at
damages of energotransport facilities
Gurgenidze
D.R.
There is presented a procedure of determination of
the path of oil stream spilled in the estuary at damages of energotransport
facilities, in particular, at transportation of oil by trestle pipelines, tank
cars etc. The path of the oil spilled in the estuary was determined by the
numerical method using modified mathematical software Maple 95. The difference
between the estimation results and the natural data was within 15-20%.
Keywords: hydroecology, estuary,
energotransport facilities, oil, damages.
Summary
On an application of the quadratic transformations for solution of
positional problems
Khatiskatsi
I.E. and Metreveli M.G.
A positional problem of applied geometry was solved
by using quadratic transformations. Such problems arise in machine-building at
designing parts and housings.
Keywords: positional problem,
quadratic transformation, applied geometry, designing.
SUMMARY
On
the issue of optimization of requests and
materialized notations in the oracle database
Magradze E.I.
and Abulashvili Kh.T.
Some issues of construction of the architecture of
the modern analysis information system for production processes are considered.
Materialized notations are important means for increasing the capabilities of
databases and decision-making support systems. One materialized notation can be
used by many interrelated requests. It is demonstrated that, in the environment
where data are actively read, the materialized notations prove themselves by
reducing the request servicing time and saving the resources needed for actual
execution of the request.
Keywords: database, Oracle, program
language, SQL, materialized
notation, optimization of requests.
Summary
Experimental investigation of The temperature conductivity coefficient
of soya products with consideration for temperature and humidity effects
Sadagashvili
E.Z.
The procedure of investigation of the temperature
conductivity coefficient of soya products depending on the product temperature
is described. The plot of the temperature conductivity of soya products against
the product temperature is given. The related empirical formulae have been
derived.
Keywords: soya products,
temperature, humidity, temperature conductivity
SUMMARY
THE TENDENCIES
OF DEVELOPMENT OF IMAGE CODING METHODS
Murjikneli
G.G., Khoshtaria K.A. and Abzianidze N.E.
The issues of video compression efficiency are
considered using the comparative analysis of image coding methods based on the adopted standards. The
further improvement of coding characteristics can be achieved using advanced
versions of Wavelet-transform for intracoding and motion compensation methods
adaptive to the image content - for interframe prediction.
Keywords: image coding, compression
efficiency, intracoding, interframe prediction.
Summary
Some peculiarities of the construction of telecommunication networks
on the base of ATM technology
Murjikneli
G.G., Robitashvili A.G., Tsiklauri D.A. and Vekua T.A.
The issues of construction of telecommunication and
computer networks on the base of the ATM (Asynchronous Transfer Mode)
technology are considered. The specific features of such networks are
described.
Particular emphasis has been placed on the prospects
for development of the ATM-based networks with consideration of the worldwide
experience. It is demonstrated that the ATM concept has formed and has quickly
found the favor of the majority, because its roots stretch deeply into general
development of the telecommunication and computer networks.
Keywords: telecommunication network,
computer network, ATM, B-ISDN.
SUMMARY
The analysis of the possibility of increasing the power
of the high-performance Computer cluster using new network technologies
Kamkamidze
E.K., Mayer A.A. and Mikiashvili N.V.
There are considered the
basic problems of selection of communication technologies at development of the High-Performance Cluster. The
ways of increasing the performance of the computer cluster by using new
communication technologies and optimum distribution of the network load are
described.
Keywords:
computer cluster, high performance, communication network.
SUMMARY
Optimal control of the transient regimes of power systems
Khutsishvili
O.G. and Khutsishvili T.G.
The problems of optimal control of power systems
based on the principles of symmetry are considered. There was used well-known
E. Neter’s theorem according to which to some symmetries of the system
correspond specific laws of conservation. The law of optimal control, connected
with fundamental laws of conservation (the law of conservation of energy and
the law of conservation of momentum), was stated.
Keywords: power systems, transient
regime, optimal control.
DETERMINATION
OF Optical parameters of zoning of branched water pipelines (with the help of
integer linear programming and excel software)
Kikacheishvili G.E. and
Kikacheishvili N.G.
Abstract. The issues of determination
of optimal parameters of zoning of branched pipelines of water supply systems
are considered. The problem is solved with consideration for the choice of
optimal diameters of the pipeline part of the system. There has been developed
a model of integer programming, which is realized by using Excel Software.
Keywords: water supply system,
branched pipeline, zoning, optimal diameters, linear programming, Excel Software.
Summary
Descriptive models simulating changes in the properties of waste
waters by some conservative chemical components
Tkesheladze
G.A., Salia T.S., Sadunishvili G.A., Nareklishvili T.G., Mchedlishvili N.P. and
Mikiashvili N.V.
The problem of construction of descriptive models
simulating changes in the properties of waste waters by some conservative
chemical components is considered. A type of a possible descriptive model
presented as a desirability function, which is constructed by
researcher’s subjective preference in relation to the considered
components, is proposed. The application of the proposed approach to the
construction of descriptive models for estimation of the waste water quality by
some conservative chemical components is exemplified by the data on Gardabani
Waste Treatment Plant,
Keywords: waste water, conservative
chemical components, descriptive model, simulation.
Summary
Application of control charts of quantitative criteria to the
process of water treatment in water supply systemS
Salia T.S., Tkesheladze
G.A., Gujabidze M.R., Nareklishvili T.G., Mchedlishvili N.P. and Mikiashvili
N.V.
The issue of application of British Control Charts
as a main tool for estimation of water quality and a means of controlling the
water treatment process is considered. There are given the formulae for drawing
up the control charts according to British Standards and the results of setting
the warning limits and the control limits for some characteristic parameters of
the water treatment process at Samgori Water Treatment Plant,
Keywords: water treatment, control
charts, quantitative criteria, British Standards.
summary
A devce for monitoring the presence of oil products in sea water at
exploration drilling
Mujiri J.N.
and Okromchedlishvili S.N.
Tbilisi
Research Institute of Metrology
A conductometric device, which is a two-electrode
cell with self-contained power supply and a transducer connected to an
ultrasonic transmitter, is presented. In case of presence of oil (gas), the
electrical conductance of the medium changes abruptly from 5.9S/m to 2×4×10-4S/m, and the
detected signal is transmitted to the ultrasonic transmitter. This allows
preventing the ecological problems caused by uncontrollable spouting of oil and
associated gases.
Keywords: exploration drilling, sea
water, oil products, gas, monitoring device, conductometry.
SUMMARY
On
the calibration of pH Measuring Devices
Dolidze A.V. and
Kartvelishvili G.V.
Tbilisi Research Institute
of Metrology
The issues concerning the
calibration of pH measuring devices are considered. There is described a
general calibration procedure, its purpose and applications. The average values
and tolerances for electrode systems are given. In this connection, control
components of pH meters are treated in dependence on the required accuracy and,
also, from the viewpoint of restoration of the action (validity) of the
abovementioned procedure and its adaptation to international projects and
standards.
Keywords: measurement of ion
activity, pH-metry, calibration procedure, accuracy, control components.
Summary
On the devices providing sanitary norms of electromagnetic field
radiation frOm the microwave heatinG-drying
conveying plant
Kokoshvili
V.D., Zurabishvili V.I., Kokoshvili I.V. and Kekelia G.V.
The devices providing sanitary norms of
electromagnetic field radiation from the microwave heating-drying conveying
plant are described. The devices are placed at the input and output of the
microwave chambers of the plant.
These devices include below cutoff waveguides, wave traps and absorbers
of microwave radiation leakage.
Keywords: heating-drying conveying
plant, microwave chamber, electromagnetic field, sanitary norms, safety
devices.
Summary
On the problem of providing the electromagnetic field homogeneity in
heatinG-drying chambers of the microwave conveying plaNt
Kokoshvili
V.D., Zurabishvili V.I. and Kekelia G.V.
For providing the homogeneity of the electromagnetic
field in heating-drying chambers of the microwave conveying plant, the
application of special gratings made of thin current-conducting pins located
near the raw material is suggested. The effect of electromagnetic field
homogeneity is reached due to the local homogeneous field generated around the
electrical gratings, i.e. the total field intensity radiated by the generators
is accumulated in the raw material layer. Such gratings with thin pins are
simple for production and application.
Keywords: microwave conveying plant,
heating chamber, homogeneous electromagnetic field, thin current-conducting
pins.
Summary
FRACTAL COMPACTION
IN A COMBINATION WITH NONLINEAR MORPHOLOGICAL FILTRATION IN CODING THE IMAGES
AND THEIR SEQUENCES
Kharatishvili
N.G., Chkheidze I.M., Steperman V.G. and Otkhozoria V.K.
The results of fractal coding of images of various
types, of the combination of
fractal compaction with preliminary "morphological" filtration, and
also for the sequence of images of linear interframe interpolation for
restoration of missed, fractally processed frames, are presented. The obtained
data testify to the efficiency of fractal coding of the images previously
filtered by a nonlinear morphological filter, and also to the increase in the
efficiency of coding of the
sequence of images by application of interframe linear interpolation.
Keywords: image coding, sequence of
images, fractal compaction, nonlinear morphological filtration.
SUMMARY
The peculiarities of selection of microcontrollers and the criteria
of its estimation
Grigalashvili
D.S. and Tsveraidze Z.N.
The peculiarities of application and the problem of
selection of the microcontroller for efficient solution of a particular problem
at a wide variety of microcontrollers available on the market are considered.
The estimation criterion and the recommendations on the selection of
microcontrollers have been worked out. The comparative characteristics of
microcontrollers produced by Motorola, Amtel, Microchip and Zilog for the
specific use in independent microcontroller devices are presented.
Keywords: microcontroller,
selection, specific features, estimation criterion, recommendations.
Summary
Closed models of channel level protocols and
Open models of the data transmission unit
Kiknadze M.G., Petriashvili L.N. and Zhvania T.G.
Functional models of computer
networks and systems include the models of network structures and computer
components. The closed models of internode connection allow considering for the
effect of distortions of the flow of protocol data blocks in direct and backward
communication channels on the operational characteristics of the data
transmission unit and performing the optimization of the values of frame length
and window width by the criterion of the capacity of internode connections. The
open models of data transmission unit in the form of a two-unit network
fragment allow studying the effect of the factor of blocking of buffer memory
of the transit commutation unit and protocol parameters on the capacity of
start-stop and pipeline protocols of control of the data transmission unit.
Keywords: data transmission network, open models, closed
models, protocol.
Summary
Comparative
analysis of the sources of continuous power supply used in modern
telecommunication and computer networks
Kobakhidze T.D.
The topical problems of the construction of continuous power supply
systems are considered. A comparative analysis of such systems has been
performed. There is justified the expediency of division of secondary power
sources (SPS) into two groups: the SPS for computer networks and the SPS for
telecommunication networks,
Keywords: continuous power supply, telecommunication network, computer network,
secondary power source, comparative analysis.
SUMMARY
On the peculiarities of cophasal modes of operation of continuous
power supply sources with the external power supply system
Kobakhidze
T.D., Nachkebia Sh.Sh., Bochikashvili P.N., Vekua T.A. and Kurtanidze G.G.
The issues related to cophasal modes of operation of
the sources of continuous power supply of computer and telecommunication
networks are considered. It is demonstrated that, for construction of the synchronizing
circuit in the abovementioned power
sources, integration of additional units is necessary.
Keywords: cophasal mode, computer network, telecommunication network, continuous power supply.
SUMMARY
Computation of the processes of gasification of the coal from the
Tkibuli – shaori deposit by computer simulation
Bzhalava N.P.,
Computer simulation of production of vapor-oxygen
producer gas from the coal of the Tkibuli-Shaori Deposit (Georgia) is discused.
For computations, table processor Excel with integrated program language VB for
Application was used.
Keywords: coal deposit,
gasification, computer simulation.
SUMMARY
Economic and ecological aspects of the application of biogas
Arabidze N.T.,
Guliashvili M.N. and Кhetaguri A.G.
The analysis of economic and ecological efficiency
of replacement of natural gas with biogas using a new technology is presented.
For estimation of the economic effect of the new technology, a multifactor
mathematical analysis was performed. The effect of the considered parameters
(the demanded amount of natural fuel, the heat equivalent of fuel and the
equivalent fuel cost) on the change in the total index was determined.
Nowadays, when the cost of natural gas is continuously increasing, the
application of biogas instead of natural gas allows obtaining both ecological
and economic efficiency, which will help to resolve acute economical and
ecological problems of the population.
Keywords: biogas, economic effect,
ecology, new technology.
Summary
Improvement of the security of building Alignment using
microprocessor systems for recording the parameters of lifting
Zotov M.V.
Interbiotech
Research –Production Company,
The system of improvement of the security of
building alignment with the help of hydraulic jack systems using microprocessor
systems for recording the parameters of lifting is proposed. The system
operates in a semi-automatic mode. Automated is recording of the data from
displacement detectors with account for correction of the data by the feedback
method. The readings of the signals from displacement detectors and
tacheometers are displayed on the screen, and they can be corrected by the
operator. There was developed the software providing visualization of the
lifting process. and consideration for standard requirements by the difference
in settlement of the building. The system was successfully tested at alignment
of a nine-storey dwelling building in the town of
Keywords: building alignment,
hydraulic jack, security, microprocessor system, recording of lifting
parameters.
The application of laser
and holographic apparatuses for the research of medical and biological objects
by the optical methods is considered. Specific features of the medical and biological objects
produce certain limitations on the use of standard commercial laser and
holographic apparatuses for research purposes. The prospects of development of
two- and three-dimensional displays for observing the body structures and
tissues, as well as the holographic interferometry for scattering surfaces are discussed.
At the same time, the possibilities of application of holographic devices,
lasers and photomaterials, used in holographic experiments, produced by local
manufacturers for medical and biological purposes are analyzed.
Keywords:
laser, holographic equipment, medical and biological objects, research
purposes.
.
The
element composition of the meteorites found in
Kaviladze M.Sh., Gubadze N.V.,
Kaviladze I.M., Natsvlishvili G.V.,
Tsagurishvili L.B. and
Khabuliani K.I.
Iv.
Abstract. The results of the analysis
of the samples which are considered to be the minerals of the Earth origin.
However, reasoning from anomalous isotopic content of some elements, the
authors suppose that those samples may be meteorites, if not the obtained results are novel and they are of major
importance for investigation of astrophysical processes and the physics of the
Earth.
Keywords: meteorite, presolar grains,
isotopic ratio, elemental composition.
Summary
New possibilities of processing of pyrometallurgical
wastes of production of non-ferrous and noble Metals: 1. Production of arsenic
(III) oxide form the wastes
Gigauri R.D.,
Pareshishvili N.G.,
Iv.
The possibility of production of higher
trialkylarsenites directly from arsenic-containing pyromethallurgical wastes of
tin production has been studied. It is demonstrated that the abovementioned
products are obtained with high yield at treatment of the initial mixtures with
monoatomic higher alcohols (R ≥ Am) at the suspension boiling temperature
by the method of azeotropic drying.
Keywords: trialkylarsenites,
pyrometallurgical waste, processing, tin production.
SUMMARY
COMBINED Volumetric determination of arsenic and nickel in aqueous
solutions
Gigauri R.D.,
Amirkhanashvili D.G., Arabuli L.G., Gurgenidze M.N. and Injia M.A.
Iv.
A rapid procedure of titrometric determination of
arsenic and nickel in the same solution was developed. It is demonstrated that
the prerequisite of achievement of the goal set is pretreatment of the samples
by the Evans method. At first nickel is titrated with the 0.01 M solution of
EDTA (indicator - murexide), and then arsenic is titrated with the 0.05N
solution of iodine in the presence of starch. The ions of other metals
interfere with the determination of nickel, and the ions oxidized by iodine
interfere with the determination of arsenic: antimony (III), vanadium (IV) etc.
The procedure has been applied to the analyses of both mineral and synthesized
nickel - and arsenic-containing compounds.
Keywords: arsenic, nickel,
aqueous solutions, volumetric
determination, titration.
N-methyldialcoxysilylmethyl lactams were synthesized
by heterofunctional condensation of chloromethylmethyldialcoxysilanes with
lactams in the presence of K2CO3.The reaction of hydrolytic
polycondensation was performed.
Keywords: lactams, silanes,
synthesis, heterofunctional condensarion.
SUMMARY
Development of materials of the fire-clay-Quartz sand-Glass
composition for electrotechnical Purposes
Gagoshidze
S.Z. and Cheishvili T.Sh.
For production of electric isolating materials,
there was studied composition “fire-clay-quartz sand-glass”, in
which soluble glass was used as a binding agent. By studying the binary
compositions on the basis of fire-clay, quartz sand and glass breakage powders,
a significant effect of the composition on two basic properties of the
materials, strength and electrical resistance, was revealed. In the ternary
composition were obtained the materials containing 40-80 weight parts of the
fire-clay powder. The samples obtained by compacting and baking are
characterized by electrical resistivity of lgρ= 9 -11 Ohm××m and compressive strength
of 28-42 MPa. Therefore they can be recommended as the base for production of
electric insulating materials.
Keywords: electric insulating
materials, fire-clay, quartz sand, glass, strength, electrical resistance.
SUMMARY
REACTIONS OF CONDENSATION of 4-HYDROXYCOUMARINS WITH SOME BIOLOGICALLY ACTIVE COMPOUNDS
Jinikashvili
I.V., Khachidze M.M., Kvartskhava G.R., Tsitsagi M.V. and Dolidze A.V.
P.
Melikishvili Institute of Physical and Organic Chemistry
The reaction of 4-hydroxycoumarin with
N-isonicotinoylhydrazone and imidazole,
biologically active compounds were obtained. Additional reactions with
the C=N bonds were investigated.
In the case of unsaturated compounds, the reactions proceeded at the C=N bond. The reaction of condensation was
carried out in water suspension in the presence of pyridine at 950C for 3-4 h.
Keywords: 4-hydroxycoumarin,
N-isonicotinoylhydrazone, imidazoline,
biologocally active compounds.
SUMMARY
The Acylation of certain derivatives of 1,4-naphthoquinone and
4-hydroxycoumarin with chlorine anhydride of chrysantemic acid
Jinikashvili
I.V., Kavtaradze N.A., Dolidze A.V. and
Chedia R.V.
P.Melikishvili
Institute of Physical and Organic
Chemistry
The
posibility of obtaining new biologically active compounds on the basis of a
natural bioregulator (chrysantemic acid- the acid component of pyretrins) and
various biologically active substances is discussed. Acylation was realized by
means of chlorine anhydride of chrysantemic acid. Chlorine anhydride of
chrysantemic acid was obtained by the interaction of chrysantemic acid and
thionylchloride (200С,
72 h, Ar). The conditions of acylation reactions of juglone
(5-hydroxy-1,4-naphthoquinone), isonaphthazarine (2,3-dihydroxy-1,4-
naphthoquinone) and 4-hydroxycoumarin were studied. The structures
of juglonylchrysantemate, isonaphthazarinylmonochrysantemate and
coumarinyl-4-chrysantemate were determined by IR, NMR(1H, 13C)
and mass-spectra methods.
Keywords: juglone, isonaphthazarine, 4-hydroxycoumarin, chlorine anhydride of chrysantemic acid, acylation.
Gakhokidze R.A., Sidamonidze
N.N., Tabatadze L.V. and
Tatarishvili M.Z.
Iv.
By acid isomerization, under the action of lead
hydroxide, 1-chloro-1-deoxy-3,4,5,6-tetra-o-acetate-keto-L-fructose was converted into 2-deoxy-L-gluconic acid. The reduction of the corresponding lactone yields
2-deoxy-L-glucose.
Keywords: 2-deoxy-L-glucose, acid
isomerization, lead hydroxide.
ANTIBACTERIAL ACTIVITY OF
BROMIDE DISACCHARIDES
Tabatadze
L.V. Tatarishvili M.Z., Gakhokidze R.A. and Sidamonidze N.N.
By
the interaction of allyl derivarives of disaccharides (maltose, lactose etc.)
with ethyl ether of 2-bromopropanic acid, hepta-0-acetyl-1-0-(a- methyl-g-bromovalerate)
- b-D-,altose and hepta-0-acetyl-1-0-(a- methyl-g-bromovalerate)
- b-D-lactose
were obtained.
SUMMARY
investigation
of the ARSENIC content in woody plants of
Loria N.V., Supatashvili
G.D., Dughashvili D.T. and Labartkava N.A.
Iv.
There was determined the content of arsenic and its
distribution in woody plants growing in
Keywords: woody plants, arsenic,
content.
SUMMARY
the investigation Results on the biochemistry of tung-oil
Kamushadze I.D., Rukhadze V.V.,
Khvedelidze V.G. and Buchukhishvili M.L.
The basic physical and
chemical parameters. of tung-oil were determined. It is shown that the tung-oil
produced by pressing and extraction hardly differs by its composition. The high
polymerization activity of of the tung-oil is determined by eleostearic acid the
content of which makes up 96-97 % of the total content of lipids.
Keywords: tung-oil, biochemistry, eleostearic acid.
SUMMARY
Development of sorption –
electromembrane technology of water demineralization for power and
technological needs of Rustavi Azot CO.
Chkheidze N.V. Soselia G.A., Kvitsiani L.A., Jalagonia D.N. and Gigashvili Z.T.
The
basic aspects of water demineralization by the method of ion exchange are stated; its
positive and negative sides are shown. The technological process of
water demineralization at Rustavi Azot Co. is considered. The experimental research of
water demineralization using a model of the electrodialyzer for imitate
solutions was carried out. The processes of water demineralization with
simultaneous production of highly concentrated brines were studied. The parameters of the electrodialysis
process and a real device were calculated. A new combined technological
scheme of water demineralization by switching-on of the electrodialysis plant
is proposed . The expected economic effect at Rustavi Azot Co. is shown.
Keywords: water demineralization,
soption-elecrtomembrane technology, electrodialyzer.
SUMMARY
The study of the process of treatment of the water of the river
kvirila
Gogeliani
L.D., Mekvabishvili N.I. and Dondoladze N.G.
The process of removal of water hardness and
suspended substances from the water of the River Kvirila, Georgia, was studied
with the aim of using the treated water in metallurgical industry. This goal
was accomplished by using the complex reagent consisting of trisubstituted
sodium phosphate, 0.03% diphenylamine, 0.15% plaster and 0.5% acetic acid.
The phosphate ions react directly with many cations
contained in water and form hardly solvable phosphate salts. Plaster forms the
centers promoting the process of crystallization, and diphenylamine and acetic
acid facilitate the process of coagulation.
The analyses of the results obtained with the 2%, 5%
and 8% reagent showed that, in all cases, the water hardness decreased from
4.83 mg-eq./l to 0.02-0.01 mg-eq./l, the norm being equal to 0.02 mg-eq./l.
Such water hardness completely satisfies the requirements of circulation
cooling systems. It is demonstrated that the temperature changes (100C-990C)
hardly affected the increase in the rate of the process of precipitation of
salts.
Keywords: river water, water
treatment, water softening, metallurgy, circulation cooling system.
Measurement of the
quantity of precipitation in the forecast system of plant diseases
Iadze M.V., Partskhaladze R.I. and Suladze
A.S.
Abstract. The design and the principle
of operation of the independent instrument for measurement of the amount of
precipitation are described. The instrument is integrated into the
microprocessor system of forecasting the fungus diseases of the vine.
Keywords: automated forecast system,
diseases of plants, amount of precipitation, independent instrument.
SUMMARY
Development of decision algorithms for efficient changes in poultry
ration
Davitashvili
I.A. and Samkharadze R.Yu.
The decision algorithms developed for efficient
changes in poultry ration are presented . Various situations with the
corresponding decision algorithms are considered. These algorithms form the
basis of the expert system for efficient changes in the poultry ration.
Keywords: decision algorithm,
poultry ration, efficient change.
Summary
Investigation of the effect of exogenous a-amilase in beer wort production by the
example of starch saccharification and gelatinization
Khomasuridze
M.B., Khutsishvili R.A. and Shengelia M.O.
The standard method of preparation of barley wort for
beer production was used to determine the ability of endogenous α-amylase
and the efficiency of exogenous α amylase-enzyme complex Amileqs-2 at
different high temperatures during hydration, cleavage and hydrolysis of starch.
The obtained results confirmed that endogenous
amylase must have the optimal condition; otherwise it cannot actualize the process. The exogenous
α-amylase enzyme preparation is resistive to strong conditions; it keeps
its activity at the temperatures up to 1080C.
Keywords: beer production, beer
wort, α-amylase.
The
determination of the stamina of dry cultured yeast IOC 18 2007 to low
temperature and the estimation of its effect on primary aroma during white wine
alcoholic fermentation
Khomasuridze M. B.
Abstract. Grape variety, Kaxuri Mtsvane was processed by
standard microvinification procedures (it was crushed, destemmed, sulphidized
and clarified). Alcoholic fermentation was conducted at different low
temperatures (at 12-140C, 16-180C
and 20-220C). The experiment was arranged to evaluate the efficiency
of dry cultured yeast preparation IOC BR 2007, to determine its tolerance to
low fermentation temperature and to maintain the original grape variety aroma.
The organoleptic estimation and
the obtained experimental results confirmed that the abovementioned yeast
strain was able to ferment white must at low temperature. It is worth noting
that the intensity of aroma and flavor and the yield of ethanol increased
significantly in the wine sample which was fermented at the lowest temperature.
Keywords: wine-making, yeast, stamina, alcoholic
fermentation, low temperature, wine aroma.
Summary
Lobzhanidze G.V., Khvedelidze V.G. and Buchukhishvili M.L.
We have defined thermophysical characteristics of
the grape skin by the method of two time-temperature intervals within a large
scale of relevant factors, such as moisture, temperature and mass amount of the
raw materials. We have obtained adequate equatitions of regression for the
calculation of thermal diffusivity, heat conduciton, and heat capacity with
consideration for the abovementioned factors.
Keywords: grape, grape skin,
thermophysical characteristics.
Summary
establishment
of gas-chromatographic conditions for determination of cumarin in alcoholic
solutions
Kuchava G.G.,
Khositashvili M.L., Abzianidze D.I. and Asashvili T.Sh.
Research
Institute of Horticulture, Viticulture and Wine-Making
David
Sarajishvili and Eniseli Co.
The data for the establishment of
gas-chromatographic conditions of determination of cumarin in alcoholic
solutions are presented. Chromaton N-AW was used as a sorbent, granulation
– 0.160-0.200 mm, soaked with 15% Apiezon L, gas-carrier velocity –
500 ml/min, hydrogen flow rate – 26 ml/min; air velocity – 300
ml/min.
Keywords: cumarin, alcoholic
solutions, gas chromatography.
Summary
Development of the regime of extraction of cumarin in alcoholic
solutions
Kuchava G.G.,
Khositashvili M.L., Abzianidze D.I. and Asashvili T.Sh.
Research
Institute of Horticulture, Viticulture and Wine-Making
David
Sarajishvili and Eniseli Co.
Cumarin was extracted with different extragents (CCl4
and CHCl3) in alcoholic solutions. The percentages in model and
alcoholic solutions are in close agreement, which lends support to the
reliability and reproducibility of the method used. The maximum relative error
of determination made up 17%.
Keywords: cumarin, extraction, alcoholic solutions, development of regime.
Summary
Investigation of the effect of various yeasts on the formation of
aromatic substances
Mikiashvili
M.J., Tsiklauri L.Z., Khositashvili M.L., Pataraia M.S. and Abzianidze D.I.
Research
Institute of Horticulture, Viticulture and Wine-Making
The investigation results for the effect of various
yeasts on the formation of aromatic substances in wine are presented. The
physico-chemical composition and the aromatic components of the wines fermented
by various yeasts were studied. The investigation showed that there was no
qualitative difference among the samples, while there was observed some
difference in the amount of aromatic substances in the wine samples.
Keywords: wine, aromatic substances,
yeast, effect.
Summary
The investigation of ethereal oils in the rkatsiteli grape
Mikiashvili
M.J., Tsiklauri L.Z., Khositashvili M.L., Pataraia M.S. and Abzianidze D.I.
Research
Institute of Horticulture, Viticulture and Wine-Making
The results of the investigation of aromatic
substances in the Rkatsiteli grape are presented. The aromatic components of
the grape must and pomace were studied by gas-liquid chromatography. The
aromatic components were mostly found in the pomace, but a significant portion
of esters was localized in the grape pulp.
Keywords: wine, grape, Rkatsiteli
variety, ethereal oils.
Summary
oil extract of tea: CliniCal evaluation of the
therapeutic effect
Niguriani
N.G., Khvedelidze V.G. and
Mikeltadze Sh.O.
Kutaisi
Scientific Center of Georgian Academy Sciences
It
has been revealed that the oil extract of tea leaves is of interest as a rich
natural source of biologically active substances. It is shown that the extract
is pharmacologically active, and it has high pharmacological-therapeutic effect
at damages of stomach and integument. This preparation has also anti-tumor
activity at skin cancer, and it can be successfully used in oncological
practice.
Keywords: oil extract of tea, theraupeutic effect, clinical evaluation.
SUMMARY
STUDY
OF GASTROPROTECTIVE EFFECTS OF the OIL
EXTRACT OF TEA
Niguriani
N. G., Khvedelidze V. G., and Mikeltadze Sh.O.
Kutaisi
Scientific Center of Georgian Academy of Sciences
The gastroprotective
effect of the oil extract of tea at
butadion, atophan and reserpine damages of stomach was studied. It was
established that the preparation had a more expressed anti-ulcer effect than
aecolum.
Keywords: oil extract of tea, gastroprotective effect.