SUMMARY
Summary
On the
critical thickness in AIVBVI heterostructures under
diffusion mismatch
Pashaev A.M., Davarashvili O.I.,
Aliyev V.A., Bychkova L.P., Enukashvili M.I. and Zlomanov V.P.
Iv.
Diffusion mismatch in AIVBVI heterostructures
at epitaxy temperature is formed due to the mutual diffusion of components of
the emitter and the active area. If the semiwidth of the mismatched region is
more than the critical thickness, the
probability of relaxation of the corresponding pressure is high. This raises
the threshold current in lasers, and, in
photodetectors, low sensitivity is realized. The effective maximum mismatch or
the effect caused by it can be reduced, on the one hand, by changing the
profile of the structures in heterostructures when they approach the emitter
and the active area and, on the other hand, by doping the active area with the
impurities expanding the limit of elasticity.
Keywords: heterostructures, diffusion mismatch, critical
thickness.
ELECTRICAL CHARACTERISTICS OF Fe/GaAs
STRUCTURES
Mikelashvili V.T., Kvitciani O.R., Laperashvili D. L. and
Abstract. The Fe/GaAs contact has attracted considerable
interest among researchers due to both its magnetic properties and the
insignificant lattice mismatch the between the metal and the semiconductor. The
formation of Schottky barrier and its characteristics, as well as of metallic
interconnections, are strongly influenced by the structure and the disorder of
the interface. The Schottky barrier was obtained by electrochemical deposition
of ferromagnetic metal - Fe on the electrochemically etched surface of GaAs. The
aqueous solution of iron chloride was used for deposition of Shottky contact. The
ohmic contact was made by sintering of metallic indium in hydrogen. Current-voltage
and capacitance-voltage characteristics of the obtained Schottky diode based on
the Fe/GaAs barier contact were studied. The results of investigation of the
current flow mechanism in the observed structures are presented.
Keywords: Fe/GaAs structure, ferromagnetic metal,
semiconductor, electrochemical deposition, Schottky barrier.
Summary
Hydrogen atom transfer from
aromatic amines to the molecules of electron acceptors in the triplet state
Kokrashvili T.A., Kvintradze V.I. and Tsirekidze M.A.
Georgian Technical University
The
values of enthalpy, entropy and free energy of prototropic equilibrium in
nonrelaxation triplet exciplexes were obtained. It was established that, with
increasing temperature of the solution, the yield of neutral radicals
increased, while the yield of triplet exciplexes decreased. It is demonstrated
that polar triplet exciplexes are efficiently quenched by secondary aromatic amines
through the hydrogen atom transfer with the formation of corresponding neutral
radicals.
Keywords: triplet exciplexes,
triplet state, electron acceptors, electron transfer, hydrogen atom transfer.
Summary
kinetics of quenching of polar triplet exciplexes by
nitroxylic radicals
Kokrashvili
T.A., Tsirekidze M.A., Kvintradze V.I. and Pokleba A.K.
Georgian
Technical University
The constants of the rate of quenching of polar
triplet exciplexes by nitroxylic radicals were determined. It is demonstrated that
quenching of polar triplet exciplexes by radicals is efficiently performed in
the triplet complex of collision by accelerating the intercombination transfer
into the singlet exciplex located at a lower energy level.
Keywords: triplet exciplex, quenching, triplet state, nitroxylic radical.
Summary
The effect of magnetic field
on the kinetics of triplet exciplex destruction
Kokrashvili T.A., Kvintradze V.I. and Pokleba A.K.
Georgian Technical University
The
effect of magnetic field on the ion-radical yield in the systems of the type of quinone-iodine-replaced aniline was
studied. It is shown that, in the solutions of medium polarity, the basic
contribution to the triplet exciplex destruction under study was made by the
process involving the triplet-singlet transitions at the expense of magnetic
electron-nuclear interaction.
Keywords: triplet exciplex,
kinetics, destruction, magnetic field, ion-radical pair.
SummarY
ON
strongly and weakly separable Fisher statistical structures
Aleksidze L.T., Zerakidze
Z.S. and Tsiklauri E.M.
Gori University
In the present paper,
we prove that weakly separable Fisher statistical structures are strongly
separable Fisher statistical structures, and orthogonal Fisher statistical
structures are strongly separable Fisher statistical structures.
Keywords: statistical structures, strong separation, weak
separation.
Summary
ON
the Construction OF Fisher statistical structures
Aleksidze L.T. and Zerakidze
Z.S.
Gori University
In the present paper, we construct Fisher orthogonal and weakly
separable Fisher statistical structures having maximum possible power.
Keywords: statistical structure, orthogonal structures, strong separation, weak
separation.
SUMMARY
A grid of subgroups and the
geometry hall is of W-power groups
Chabashvili M.Z. and Bokelavadze T.Z.
Iv. Javakhishvili Tbilisi State University
It
is demonstrated that the basic theory of affine geometry holds for Hall’s W-power
groups if W is a ring of principal ideals. Relevant examples are cited.
Keywords: affine geometry, Hall
groups, W-power groups, grid of subgroups, nilpotent groups.
INFLUENCE OF LITHIUM AND BORON DOPING
ON the SUPERCONDUCTING TRANSITION
IN Bi-2223 Superconducting
CERAMICS
Margiani
N.G., Zhghamadze V.V., Mzhavanadze I.A., Sabashvili N.G. and
Shurgaia
G.A.
Abstract.
The influence of lithium and boron doping on the superconducting
transition was investigated in Bi-based
high-Tc 2223
ceramics. It was found that the Bi-2223 samples doped with Li and B transform into
the low-Tc Bi-2212
phase. In the Li-doped Bi-2223 samples, a nonmonotonous change in the critical
temperature takes place, while the boron doping leads to the gradual decrease
in Tc with the
increasing dopant content.
Keywords:
superconducting ceramics, doping, superconducting transition.
INFLUENCE OF BORON DOPING ON the RESISTIVE TRANSITION
IN Bi(Pb)-Sr-Ca-Cu-O GLASS CERAMICS
Margiani N.G., Papunashvili N.A., Shurgaia G.A. and
Zhghamadze V.V.
Abstract. The undoped and boron-doped Bi(Pb)-Sr-Ca-Cu-O
glass-ceramic samples with nominal composition Bi1.7Pb0.3Sr2Ca2Cu4BxOy
(x=0 and 0.3) were synthesized by
the melt-quenching method. Crystallization behavior and resistive transition of the prepared material
were examined. The addition of B2O3
to the Bi-based system suppresses the crystallization of the high-temperature
2223 phase and sharply decreases the critical temperature. The normal state
resistivity values of the boron-doped samples are an order of magnitude larger
than those of undoped ones.
Keywords: high-temperature superconductivity,
Bi(Pb)-Sr-Ca-Cu-O glass ceramics, resistive transition, boron doping.
PREDICTION
of the CORROSION RESISTANCE OF Ti-Ni-Cr ALLOY IN PHYSIOLOGICAL SOLUTION
Gozalishvili E.I., Mikaberidze M.P., Ramazashvili D.R., Akhvlediani
F.Tavadze Institute of Metallurgy and Materials Science
Abstract. The
prediction of long-term corrosive behavior of Ti-Ni-Cr alloy was carried out at
37oC in the physiological solution (0.9% NaCl) with application of
electrochemical and corrosion tests, spectral chemical analysis and statistical
methods of experimental data analysis. The obtained equation of time dependence
of the corrosion rate is expressed as C = 0.0038 exp (-0.045τ). The time
dependences of corrosion potentials and rates and the absence of pitting
corrosion allows forecasting the high corrosion resistance of alloy
corresponding to the passive state
during long-term exposure. The chemical spectral analysis confirmed the
calculated and predicted low values of corrosion rates and showed that, during
the long-term exposure, the quantity of
titanium ions passed the into solution could be neglected.
Keywords: corrosion
resistance, prediction, alloy, electrochemical calculation, passivity,
potential, corrosion rate.
SUMMARY
Zurab Bedia’s phenomenon
Prangishvili
A.I., Tsivtsivadze T.I., Chavchanidze V.V., Chigogidze N.Sh., Kveselava I.S.,
Skhiladze R.A., Gobechia G.G. and Sulakvelidze G.A.
The article is devoted to Zurab Bedia – a unique
phenomenon, who possesses a powerful bioenergetic potential capable of lighting
the electric bulbs of different power. The historical experience of hushing up
and hindering the investigations of natural phenomena has been analyzed. It is
justified that such phenomena need thorough investigation in the interests of
science and human activities. The necessity in establishing and financing a
specialized laboratory for studying such phenomena and designing the special
portable instruments – analyzers of external fields of biological objects is
emphasized.
Keywords: bioenergy,
phenomenon, biometer, solion-liquid elements.
SUMMARY
ON A PROCEDURE
OF SOLVING THE EQUATION FOR
DETERMINATION OF
THE CONTENT OF
GAS
Telia T.N. and
Chkhaidze D.T.
The percent content of dissociated co2 was determined by the
method of successive approximations with the help of Goal seek dialog
window in MS Excel. The procedure
of determination of high-order roots was developed.
Keywords: carbon dioxide, content, nonlinear
equation, solution, procedure.
SUMMARY
A METHOD OF OPTIMIZATION OF
THE PARAMETERS OF CRANK MECHANISM
Telia T.N.
A
mathematical model of operation of the crank mechanism was constructed in MS
Excel. The proposed model provides the automatic determination of optimal
values of mechanism parameters satisfying the
given initial conditions.
Keywords: crank mechanism,
mathematical model, mechanism parameters, optimization.
SUMMARY
ON A MODEL OF DATA TRANSMISSION VIA THE
COMMUNICATION
CHANNELS SUBJECT TO TRANSIENT FAILURES
Mikadze I.S.
and Mayer A.A.
The problems of faultless data transmission via the
channels subject to transient external effects of random duration are
discussed. The moments of emergence of these effects are distributed by the
Erlang law. It is assumed that the duration of interfering factors and the
methods of their elimination, as well as the duration of shot transmission, are
distributed by a random law. There was obtained the generalized state for the
probability of the message being transmitted without distortion and for the
given time.
Keywords: communication channel,
transient failure, data transmission, model.
Summary
On
the efficiency of the Use of engineering systems Subjected to failures
Mikadze I.S. and Mayer A.A.
An original method of
determination of the rate of use of engineering systems which are covered with
instrumental control incompletely is proposed. The method takes into
consideration the reliability of control instruments, the time of reliable
control at regular checks and the time of recovery. The obtained results allow
determining the optimal value of the operating rate of the system just as with
account for working costs, so without regard for them.
Keywords: engineering systems,
reliability, rate of use, instrumental control.
summary
TURBULENT LIQUID
FLOW IN A
CIRCULAR TUBE WITH
UNIFORM INJECTION THROUGH
POROUS WALLS
Tsutskiridze
V.N.
The incompressible liquid flow in a porous-wall tube
was calculated using a three-parametric turbulence model. As a result of the
calculations made, the effect of injection on the distribution of averaged and
pulsation characteristics of motion over the tube section and length is
defined.
Keywords: liquids, turbulent flow,
porous walls, injection.
SUMMARY
on
the problem of correction of single errors in linear code 3B4B
Nanobashvili D.V. and
Nanobashvili V.V.
There are considered the
problems of correction of single errors in linear code 3B4B. There are shown
the possibilities of enhancement of efficiency of the correction method,
proposed by the authors earlier, based on the detection not only of forbidden
combinations but also of partially false allowed ones in the linear signal.
This method allows correcting not 44% of errors, as it happens in the case of
detection of only forbidden combinations, but 63% of errors, which
significantly improves the quality characteristics of optical-fiber
telecommunication systems.
Keywords: linear code 3B4B,
disparity, allowed combinations, forbidden combinations, errors, correction.
SUMMARY
INFORMATION STORES
IN THE BANKING SYSTEM
Petriashvili L.N.,
Kiknadze M.G. and
Gvaramia E.G.
The
refinement of the
system of processing,
analysis and representation of
information must be
organized on the
bases of knowledge
of concrete demands,
addressed information representation and
improvements in methodological tools
of analysis. The creation
of the systems of
operational standards of
the bank and
of decision-making is associated
with the formation of the information
store by applied
technologies.
Keywords: information store,
banking system, operational
standard, decision-making.
SUMMARY
Basic trends in diagnosing the financial status of georgian enterprises
Magradze M.D.
The
problems associated with the necessity in diagnosing the financial status of
the enterprise are considered. Special attention is given to the methodical
approaches to the realization of diagnostics, the problems of the cycle of
production development, the analysis of the financial status of the enterprise,
the necessity in management - marketing renewals etc. The required computation
of the financial indices of the enterprise is presented.
Keywords: enterprise, financial
status, diagnostics, basic trends.
DATAWARE AND LEGAL REASONING
OF
THE ENVIRONMENTAL MONITORING
Shatberashvili I.G., Chkhartishvili
A.G., Japaridze L.G.,
Tsitskishvili M.M., Ninua T.L.,
Osidze I.G. and Tsitskishvili M.S.
Abstract. Today, in resolving the tasks of
environmental monitoring in practice, the basic limiting factors are economic -
cost estimations. Hence the issues of typisation and statistical reliability
are of primary importance. It is necessary to understand the unity and the
contrast of the problems of monitoring
for various environments. From the point of view of the theory of informational
science, at the present stage, the problems of monitoring should be considered
joinly for all three natural environments (air, ground, water). It is justified
by uniform operating administrative-legal basis and uniform methodology of the
theory of informational science as well as by
close coherence of the environments.
Keywords: environment, ecology, monitoring,
dataware, legal reasoning.
Summary
Ecological PROBLEMS OF the
MODELING of SUSTAINABLE FUTURE OF the REGION
Chkhaidze
N.Z., Tsitskishvili M.S., Tsitskishvili M.M. and Japaridze L.G.
UNESCO Chair of Ecological
Education and Management,
The
ecological crisis, the main alternative of the progress of modern civilization,
has posed a number of problems, including educational ones, to the developing
world community. In this work, the basic criteria of differentiation of ecology
from other natural sciences – the existence and the indissoluble unity of
"ecological triad" are formulated; the basic problems of ecology of
the
Keywords: environmental
protection, ecological problems, sustainable future, ecological triad,
modeling.
SUMMARY
ON THE BASICS OF MANAGEMENT OF TECHNOGENIC AND ECOLOGICAL
SAFETY AND RISKS
Chkheidze N.V. and Tsikhelashvili Z.I.
Successive stages in the management of technogenic
and ecological safety and risks are discussed in accordance with the essence
and the function of such management. It is emphasized that, at the regional
level (cities, provinces etc,), the safety and risk management must mainly be
aimed at the resolution of perspective long-term tasks, the formation of target
settings and strategies of risk management and also at working-out of essential
legal-normative bases for ensuring the high level of human life. The approaches
of functional subsystems and measures to the corresponding problems on
providing the technogenic and ecological safety and the risk management for making
the adequate management decisions under the conditions of emergency situations
are discussed.
Keywords: emergency situation,
organizational basis, technogenic safety, ecological safety, risks, management.
SUMMARY
On some physical-chemical properties of nanomodified zeolites used in
the practice of desiccation of organic liquids
Andronikashvili T.G., Eprikashvili L.G., Kordzakhia T.N., Pirtskhalava
N.V.,
Zautashvili M.G. and Dzagania M.A.
P. Melikishvili Institute of Physical and Organic Chemistry
There are discussed some
issues of physical-chemical properties of the most studied zeolites such as the
zeolites of groups A, X and Y, mordenite, erionite, clinoptilolite-heulandite,
phillipsite and chabazite. It is demonstrated that their molecular-sieving
properties depend not only on the geometry of channels, but also on the
chemical composition of crystals and, first of all, on the origin and the
number of cations compensating the negative charge of alumosilicate lattice.
Keywords: zeolite, molecular sieves, physical-chemical properties, mordenite,
erionite, clinoptilolite, heulandite, phillipsite, chabazite.
Summary
Eh-sensitive GLASS ElectRodes with Electron Conductivity
Dolidze V.A. and Dolidze
A.V.
The
state of art and the prospects of designing of glass electrodes with electron
conductivity for measurements of redox potentials of solutions under different
conditions are discussed. The compositions of developed Eh-sensitive electrode
glass and the electrodes produced on its basis commercially are described. The
possible influence of cations on the electrode (hydrogen, metallic, oxidation)
functions of the glass is discussed. The results of the study on the positions
of isomorphic substitution of atoms in crystals are given.
Keywords: ionometry, redoxmetry, glass electrodes, electron
conductivity, properties.
Summary
Metallographic
analysis of the welds of some steels
Dadianidze G.A.,
Khutsishvili M.G. and Sulamanidze A.K.
F. Tavadze Institute of Metallurgy
and Materials Science
Microstructural studies on the welds of ADS steel of
quality DI-46 and DI-47 at different speed of cooling (from 150/s to
1800/s) were performed. It is shown that the increase in speed
causes changes in the structure and the hardness of steels . By X-ray
microanalyses, it was established that the welds of steels DI-46 and DI-47
contained titanium carbides TiC and Ti(C,N).
Keywords: welding, steel, welds,
titanium carbide, metallographic analysis.
Summary
The study on the effect of coating on the weld
strength
Sulamanidze A.K., Khutsishvili M.G. and Dadianidze G.A.
F. Tavadze Institute of Metallurgy and Materials Science
The results of testing
showed that, at welding, steels of quality DI-46 and DI-47 tend to forming the
cooling cracks. Though, the weld strength of those steels could be controlled
by varying the weld metal composition
with the help of coatings.
Keywords: welding, steel, welds, coating, weld strength.
Summary
On promising high-tech methods
of solid fuel combustion
Kevkhishvili N.a.,
natsvlishvili t.sh
and kevkhishvili v.A.
A brief
review of the methods of combustion
of low-reaction solid
fuel is presented.
The advantages and the drawbacks of these methods are assessed. their
applications are discussed.
The advantages of
solid fuel combustion
by using the fluidized
bed are justified.
Keywords:
solid fuel, fluidized bed,
combustion, perspectives.
Summary
The
methods of water treatment in horizontal
settling chambers
Mamedov akhmed shirin ogli
Research and design institute “sucanal”,
The problems of treatment of highly muddy water for farming water supply
in arid zones are discussed. Under such conditions, for treatment of highly
muddy surface waters, traditional radial and horizontal settling chambers are
used. In this paper, a new efficient construction of the settling chamber is
offered. The constriction is described in detail. The specific feature of the
chamber is that its middle wall is equipped with deep gates, which are located
at the level of silting of the chamber.
Keywords: muddy water, water treatment, horizontal settling chamber,
construction.
Summary
On the toxicity of exhaust gases of Diesel ENGINES AND THE WAYS OF
ITS REDUCITON
Purtskhvanidze
G.N. and Lomidze A.N.
The harmful impact of automobile transport on the
environment and the human health is
discussed. The sources and the concentrations of toxic substances in exhaust
gases of internal combustion engines are described . The effect of the process
of filling of cyinders on the power and toxic indices of the engine is considered.
A new design of the air system is proposed. The system allows us to increase
the mass of fresh air charge, to reduce the irregularity of filling of the
cylinders and hence to reduce the specific fuel consumption and the fumes of
exhaust gases.
Keywords: diesel engine, exhaust gases, environmental
protection, toxic substances, air supply
system.
SUMMARY
On the new methods of minor repairs on the road carpet
Shishinashvili
M.T., Burduladze A.R. and Kachiuri B. I.
Some new methods of minor
repairs of the road carpet are discussed. Basically, the way of patching repair
is considered. There are also given the
methods which have been implemented and are widely used in the leading countries:
the injection technology – microsurfacing and the use of poured asphalt. The
implementation of abovementioned technologies and their wide application in
Keywords: road carpet, minor repair technology.
SUMMARY
ON THE USE OF
SOME STATISTICAL CRITERIA IN DECISION-MAKING
Tsikhelashvili
Z.I., Lezhava A.P., Giorgadze G.P., Giorgadze P.Sh. and Verulava G.I.
The problems of using some statistical criteria in
decision-making are discussed. Among those criteria are the following: Wald
maximum criterion (extreme pessimism criterion ), Savage criterion of maximum
risk (extreme optimism criterion) and Hurwitz pessimism-optimism criterion
which is recommended to compute for something intermediate between pessimism
and optimism. It is recommended to use those criteria for decision-making under
the conditions of stochastic
uncertainty, as the choice of the decision based on one or other criterion
would be more justified than the volitional choice. Those criteria could be
used for making decisions in various fields (chemical technology, sociology,
hydroengineering etc.), where different kinds of uncertainty are encountered.
Keywords: decision-making, Wald
criterion, Savage criterion, Hurwitz criterion, stochastic uncertainty.
Summary
On the assessment of ecological risks with consideration for
changing social-economical conditions
Lezhava A.P.,
Giorgadze G.P. and Verulava G.I.
An approach to the assessment of ecological risks
with consideration for changing
social-economic and other conditions is proposed. The notions of “dose-effect”
and “action-effect” have been classified. The WHO, the American Agency of
Environmental Protection and the International Agency of Research of Cancer (IARC) have not worked out concrete
recommendations on the assessment of risks by these notions yet. The proposed
approach to the assessment of ecological risks is based on the determination of
probability parameters which the state and the stability of natural
communities and natural environment as a
whole depend on. On this basis, the formula of determination of the probability
of reduction in biological diversity below the criterion level is given.
Keywords: environment protection,
ecological risk, hazard measure, changing conditions, human health.
On the
assessment of environmental pollution with industrial organic pollutants
Chankseliani A.B., Kutsiava
N.A., Gongadze N.P. and Legashvili I.T.
Ministry of Environment
Protection and Natural Resources of
Abstract. The inventories of polychlorinated biphenyls
and dioxin-furans on the entire
Keywords: environment protection,
organic pollutants, industrial waste, inventory, pollution level, assessment.
Summary
The methods of data separation at measuring the humidity and the density
of constructional materians
Khurtsilava A.K.
The methods of separation of the data on
electrophysical characteristics of constructional materials into the components
concerning only the humidity and the density are discussed. It is shown that it
is more expedient to neutralize the influence of mineralization of porous
moisture, which is a noninformative factor, by special measuring procedures,
instead of increasing the number of equations in the set and hence the number
of measurement channels. At the same time, the informative signal of the sensor
must be always determined uniquely by the reactive component of its impedance.
keywords: constructional materials, humidity, density, data separation.
summary
optimal control of the dynamics of soil humidity under drip
irrigation
Javadzade e. b.
Research
Institute of Erosion and Irrigation,
The method of drip irrigation is discussed. it is demonstrated that, in comparison
with other methods of irrigation, the drip irrigation provides optimal
humidifying in the root systems of
plants, prevents the loss of water and forms the conditions for economical use
of irrigation water, which promotes the increase in the soil temperature due to
permanent circulation of water in the root system and thus in the acceleration
of plant growth. It is also justified that, at drip irrigation, drops of water
are accumulated in the active soil layer more intensely, which reduces the surface
runoff and, as a consequence, the soil wash-out and compaction.
Keywords: drip irrigation, soil
humidity, optimal control.
Summary
Investigation
And Intensification of the process of ULTRAFILTRATION OF biological solutions
rukhadze Sh.Sh., Tavdidishvili d.R.,
lomaia R.T., pkhakadze t.Y. and beshkenadze T.A.
The results of theoretical and experimental
investigations on the concentration of biological solutions are presented. The
series of obtained results supports the possibility of using the method of
ultrafiltration for concentration of gamma globulin. A method of reduction of
the concentration polarization is
proposed. Its efficiency is justified theoretically and experimentally. The
relationship between the frequency of pressure pulsation and the height of
intermembrane channel was determined, which could efficiently be used in
designing of flow membrane devices. The
obtained quantitative results were quite satisfactory: under the
pressure of 0.6 ± 0.1 MPa and at the
temperature of 20°C, the permeability made up
6.5 l×m2/h , the
membrane selectivity - 0.99.
Keywords: biological solutions,
ultafiltration, intensification.
EXTRACTION OF ECOLOGICALLY PURE BLUE VITRIOL
FROM CHALCOPYRITE ORES BY A MICROBIOLOGICAL
METHOD
Kaplanishvili J.Sh.
F. Tavadze Institute of Metallurgy and Materials
Science
Joint Stock Company MADNEULI
Abstract. As a result of leaching of
chalcopyrite concentrate by a microbiological method, complete separation of
copper and iron takes place. Sulfide copper is oxidized in the amount necessary
for formation of CuSO4∙5H2O, its excess amount
separates out in the elementary form. The amount of pyrite does not change, the
pyrite being enriched with gold and silver.
Keywords: chalcopyrite ore, blue
vitriol, leaching, microbiological method.
Certain Physiological and Bacterial Features of Thiobacillus Ferrooxidans Found in
Sulphide Ores and Thermal Sulphur Waters of Georgia
Sakhvadze L.I., Kaplanishvili
J.Sh., Sakhvadze D.V. and Tavadze G.F.
F. Tavadze Institute of
Metallurgy and Materials Science
Joint Stock Company MADNEULI
Abstract. The morphologic-culture- and
physiologic-biological features of the
isolated strains were studied . It was established that they belonged in the
species of Thiobacillus ferrooxidans.
The species of Thiobacillus ferroxidans.
The specific feature of this culture is its high activity both in the oxidation
of iron and in the formation of oxalic acid, This is of great importance for
reduction of oxidized compounds of various metals.
Keywords:Tiobacillus ferrooxidans, sulfide ores, thermal sufide waters, physiological
features, biochemical properties.
Summary
The
effect of wine maturation in oak wood on the changes in chemical components of
wine
Megrelishvili M.M.
The
wines matured in new and old oak casks were analyzed. The samples were taken
from red dry wine made of Saperavi variety grape and the Kakhetian-type wine
made of Rkatsiteli variety grape. The casks were made from oak species Quercus iberica. The effect of
maturation in oak wood on the changes in spirit percentage, volatile acids,
catechols, flavonols and polymeric proanthocyans in matured wines was revealed.
Keywords: mature wines, oak cask,
maturation, chemical components.
The Influence of Microfertilizer “Lile” on Vegetable
Growth and Development
Rekhviashvili L.M., Orjonikidze E.K., Chikhladze G.M., Lortkipanidze R.O.,
Chachkhiani N.R.,
Gakhokidze R.A. and Bazerashvili L.G.
L. Kanchaveli Research
Institute of Plant Protection,
Iv.
Javakhishvili Tbilisi State University
Agricultural
Biotechnological Center, Tbilisi
Abstract. The article deals with the
issues of treatment of vegetable shoots with environment friendly
microfertilizer “Lile”. Such treatment gives high ecological and economic
efficiency. Mictofertilizer “Lile” increases the biometric indices of plants,
facilitates the activation of on-going living processes in the plant and the
plant endurance towards a complex of diseases. The given fertilizer “Lile” may be
used as the effective and ecologically safe means of increasing the plant endurance
towards a complex of diseases, facilitating the plant growth and development and
improving the qualitative-quantitative indices of crops.
Keywords: vegetable culture,
microfertilizer, preparation Lile, efficiency.
ON the
measures of Struggle against Citrus Culture vermins
Orjonikidze E.K.,
Rekhviashvili L.M., Lortkipanidze R.O., Chachkhiani N.R.,
Gakhokidze R.A.
and Bazerashvili L.G.
L. Kanchaveli Research Institute of Plant
Protection,
Iv.
Agricultural Biotechnological Center, Tbilisi
Abstract. The worked-out measures of struggle with vermins of citrus cultures ensure higher biological and economic efficiency. In particular, modern insecticides and biological preparations allow controlling the number
of vermins. Up to 92-95% of the vermins are eliminated; the harvest increases by 28-32%, and the profitability reaches 300-350%.
Keywords: citrus cultures, vermins,
insecticides, measures of struggle.
SUMMARY
Changes in the quality of hazelnut fat under heat treatment with IR
radiation
Silagadze M.A., Berulava I.O. and Iobidze A.V.
It was
established that irradiation of hazelnut nuclei with IR rays allowed reducing
the heat treatment duration by a half as compared to the traditional method of
roasting (with hot air at 130-1450C). In the latter case, the time
of roasting makes up 30 min, whereas the time of IR heat treatment makes up 15
min (at 1500C). At tasting, the hazelnuts roasted by using the IR
radiation at 1500C for 15 min gained the highest estimation (87
points). It was also established that roasting of hazelnut nuclei at different
temperature hardly affected the peroxide number of hazelnut fat. The hazelnut
nuclei roasted by the proposed method should be stored in cellophane packages
for 6 months.
Keywords: hazelnut, IR
radiation, peroxide number, roasting, fat.
Summary
Technology of production
of cornel jelly
Shildelashvili I.I.
J.
The
study on the improvement in the technology of production of cornel jelly was
performed. It was established that, from every variety of cornel fruit: Crimean
bottle-shaped, Large-fruited late, Lagodekhi early, Small-fruited late and
Okroshinda, which are spread in Kakheti zone, it is possible to produce
high-quality jelly. The raw materials should be of complete ripeness for making
the high-quality jelly from the damp fruit. Keeping the fruit under usual
conditions for 1-2 days gives us good results if it is fresh-gathered. Boiling
of the raw materials for 20
minutes by adding 20% water should be considered as the optimal conditions for
making the juice from the raw materials. For making the jelly, it is better to
take the 1:1 proportion of juice and sugar and to boil the mixture for 20
minutes. In the high-quality jelly, the proportion of main components should be
presented approximately in this way: sugar - not less than 58%; pectin - not
less than 0.8%; acid - not less than 0.95%; water – 39.5%; active acidity –
3.2. So the cornel jelly represents a national, ecologically clean product,
which contains vitamins, mineral substances and amino acids. It does not need
particular conditions of storage. The described cornel jelly can be widely used
in cookery and canning.
Keywords: cornel, jelly, production
process, quality.
Summary
The study on the possibility Of proDuction of secondary raw
materials from used thermoplastic items
Gachechiladze
M.V.
For protection of the environment from pollution,
the possibility of production of
secondary raw materials from used thermoplastic items is discussed. There is
offered a two-stage procedure. At the first
stage the rheological and technological parameters of the items are studied by
using the rheometer modified by the
author (patent is available). At the second stage, the items are recycled with
the help of the granulating unit, designed by the author, for production of
secondary raw materials. The design and the
production process are briefly described. The prospects of improving the granulator
design and its serial production are shown.
Keywords: thermoplastic items,
secondary raw materials, recycling, rheometer, granulating unit.
SUMMARY
OPTIMAL
DESIGNING OF THE PROCESSES OF
MANUFACTURE OF GARMENTS
Zakaraia
M. M.
On the
basis of research of traditional designing techniques of sewing processes and
the development of computer-aided design system, a range of problems which must be solved first of all for creation of
the uniform theoretical and informational bases for computer-aided designing of
sewing flow lines has been outlined.. The basic functional units with the
prospects of stage-by-stage progress and the system extension were
designed. For the
purpose of implementation of design procedures, the algorithm and the program, which were
tested on a model of women’s summer dress, were developed. The software package
can be applied to the computer-aided design of the process of manufacture of
garments of various types and models. The practical significance of the
proposed software consists in making simpler the process of designing, reducing
the number of designers and the operating space, raising the level of
technological solutions, etc.
Keywords: production
of garments, computer-aided design, optimization.
SUMMARY
THE ORGANIZATION OF INPUT DATA FOR THE COMPUTER-AIDED DESIGN
OF SEWING FLOW LINES
Zakaraia M. M.
The database developed for a concrete sphere - computer-aided design of
sewing flow lines suits the basic requirements to databases such as
compactness, self-descriptiveness, perfection, visualization, unification,
profitability, simplicity of application and sweeping access to the data. For
the developed arrays, the structure of logical links was established in
accordance with the sequence of formation of inquiries during the execution of
design procedures. Some data groups can be applied to the computer-aided design
of the processes of manufacture of garments of any kind and model.
Keywords: manufacture of garments, computer-aided design, sewing flow line,
organization of input data.
Summary
The
Conditions of wet processing of fiber material on the Twistless spinning machinE
Moseshvili T.V., Gamkrelidze E.A. and Goginovi K.G.
The
degree and the speed of activation of the binding substance depends on the
conditions of wetting and on the compaction of the fiber material. The thickness of the liquid film on the surface of fibers is considerably less than the sizes of drops
of the liquid generated by sprayers, which testifies to the necessity in
compression of fibrous product for the purpose of redistribution of the liquid in
the volume of their pores. The optimum pressure of air in the aerodynamic twisting
device for formation of high-grade conditions of wetting and activation of PVC fiber
should not exceed 0.004ÌPa.
Keywords: fiber, wet processing, twistless
spinning machine.
Summary
The
Influence of Twistless Structure of the Yarn
on its mechanical properties
Moseshvili T.V., Gamkrelidze
E.A. and Maglaperidze Z.I.
The twistless yarn is
formed at pasting of separate fibers as a result of interaction between the
binding substance and the fiber. As the research has shown, the most part of
fiber belongs to class 0, where the
average factor of extent of fiber is equal to 1. The fibers are extended in
parallel to the axis of the yarn along their entire length and are basically
located close to the product axis. The
peripheral fiber belong to other
classes, they are located along screw lines with a big step. The durability of twistless yarn is much higher than the durability of
the yarn produced by ring spinning.
Keywords: twistless yarn, fiber,
structure, mechanical properties.
Summary
Mathematical
model of interaction of solar radiation with the structure of textile fabric
Gintibidze N.G., Mardaleishvili Z.Z., Sopromadze I.G., Cheishvili M.O. and Tkhelidze N.N.
The issues of the influence of solar radiation on the human organism are considered. A mathematical model of interaction of solar radiation with the structure of textile fabric is given.Keywords: solar radiation, textile fabric, interaction, mathematical model.
summary
Modeling
of the friction gear transporting fiber Fibroin 3
Gintibidze N.G. and Zakaraia
M.M.
The
purpose of designing of the device is mechanization and automation of the
process of formation of the fiber produced by chemical processing of waste
products. A characteristic feature of the device is the arrangement of its
units in the closed space, the form and the dimensions of which are limited.
Thus it is necessary to note the complexity of technological process which
consists of a plenty of operations that are carried out in the chemical
environment. In conformity with the modular principle of construction of
machines, on the basis of the initial technological process, an original
friction gear for transporting the fiber has been designed.
Keywords: fiber, transportation, friction gear, design.
Summary
Dyeing of woolen fabrics with
natural bioprotective dyes
The basic characteristics of safety of textiles have
been investigated and compared with the authorized norms. The ðÍ value of the water extract from the fabric
should be equal to 4.0 to 7.5. This is due to the fact that our skin
(consisting basically of collagen fiber) has typically ðÍ4.5 to pH5.5 (isoelectric point). The stability of coloring to sweat and saliva
(for children) is also very important. This parameter of stability is connected
with safety, as the dye exposed to the influence of sweat or saliva could get
into the organism.
Keywords: wool, natural dyes, dyeing.
Summary
on the problem of children’S
Shoes associated with foot pathology
Grdzelidze M.G. and Katamadze A.G.
Akaki Tsereteli State University, Kutaisi
The
pathology of children’s feet could be the first symptom of serious problems
with health. Reflexogenic zones and points that innervate almost all the organs
of human body are located on feet. The flat foot is a kind of foot deformation
with flattening of foot vaults. There are recognized lengthwise and cross kinds
of flattening. Their combination is also possible. The results of our studies
enabled us to work out the recommendations on prophylaxis and preventing the
development of flat foot in children by choosing the appropriate shoes and
orthopedic appliances.
Keywords: shoes for children,
flat foot, orthopedic appliances, prophylaxis.
SummAry
On the specific
requirements imposed upon
footwear with consideration
for foot pathology
Grdzelidze
m.g., katamadze a.g. and shalamberidze m.m.
akaki Tsereteli State University, Kutaisi
The
issues of taking
into consideration the
specific features of
foot structure in
footwear production have
not been adequately
studied. Especially this
concerns various foot pathologies. More precise
definition of their severity and frequency of occurrence is
essential for their
prophylaxis and elimination. The incorporation of correcting elements into working
and daily footwear is a necessary and
efficient measure. Based on considerable experimental materials, the specific requirements
imposed upon footwear with
consideration for foot pathology are
discussed.
Keywords:
footwear, foot pathology, specific
requirements.
