Maia Dzagania

Maia Dzagania
Ivane Javakhishvili Tbilisi State University | TSU · Petre Melikishvili Institute of Physics and Organic Chemistry

About

68
Publications
4,554
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
49
Citations
Citations since 2017
29 Research Items
40 Citations
2017201820192020202120222023024681012
2017201820192020202120222023024681012
2017201820192020202120222023024681012
2017201820192020202120222023024681012

Publications

Publications (68)
Conference Paper
Full-text available
The chemical composition of lignite from the Vale deposit has been studied. The structura of the mineral is determined by infrared spectroscopy. The effect of a new effective substrate prepared on the basis of brown coal on the biometric parameters of wheat, beans and barley was tested under laboratory conditions. The results show that soil enrichm...
Conference Paper
Full-text available
Phosphate-containing zeolite nanomaterials were prepared by two different methods. The first method consists in introducing mono-, di-, and trisubstituted sodium phosphates into the zeolite structure at the nano level under boiling conditions on a sand bath, while in the second case this process is carried out by melting method. The structures of t...
Conference Paper
Full-text available
Wastewater and natural waters contain various pollutants of both natural and artificial origin. Treatment of these waters is carried out comprehensively by various methods, which significantly increases costs. Currently, the problem of a large amount of drugs entering the wastewater is very relevant. Drugs, unchanged or in the form of metabolites e...
Conference Paper
Full-text available
Antibiotics are considered to be anthropogenic environmental pollutants and represent a serious danger to humans and living organisms. A special problem is the presence of antibiotics and their metabolites in water. Zeolites - nanoporous materials possess a unique spectrum of physicochemical, adsorption and ion exchange properties, due to which the...
Conference Paper
Full-text available
Pollution of aquatic ecosystems poses a threat not only to the environment, but also to the life of humans and all living organisms. One of the promising direction in this area is the introduction of highly effective methods of natural and waste water purification at existing industrial enterprises, as well as the search for new granular filter mat...
Article
Full-text available
Antibiotics residues are considered to be anthropogenic environmental pollutants and represent a serious danger to living organisms. Antibiotics residues in the environment, even in very small trace level amounts, cause resistance in bacterial populations, which inevitably reduce their therapeutic effectiveness against infectious diseases. Nowadays...
Article
Full-text available
The present research concerns the possibility of adsorptive removal of the frequently used antibiotics – moxifloxacin and norfloxacin on natural zeolites – mordenite and its acid-modified form from aqueous solutions. The adsorption of the above-mentioned antibiotics on the selected natural zeolite samples was investigated under static and dynamic c...
Article
Full-text available
The paper presents results of the combined use of environmentally friendly methods in order to increase the quantity and quality of a wheat harvest by intensifying the biological processes occurring in the seed with the use pre-seeding irradiation with a low-frequency acoustic range electromagnetic field (EMFAR) and with addition of natural zeolite...
Conference Paper
Full-text available
The article investigates the method of adsorption purification from aqueous solutions of the antibiotic moxifloxacin on natural zeolite and its modified form (clinoptilolite). A validated liquid chromatography method was also used, including uncertainty assessment to determine the ability of the zeolite samples to adsorb to antibiotics. Based on th...
Article
Full-text available
Residual antibiotics pollution has become one of the most severe environmental problems today. Antibiotics from hospitals and drug factories represent a potential risk for human and ecological health. Therefore, it has been a high exigency to develop some efficient and cost-effective treatment methods and technologies for antibiotics removal from i...
Conference Paper
Full-text available
Development and validation HPLC methods for determination of some antibiotics in support of their adsorption study on natural zeolite R esidual antibiotics pollution has become one of the most serious environmental and human health problems today. Therefore, it has been a great exigency to develop some efficient and cost-effective treatment methods...
Poster
Full-text available
Residual antibiotics pollution has become one of the most serious environmental and human health problems today. Therefore, it has been a great exigency to develop some efficient and cost-effective treatment methods and technologies for antibiotics removal from industrial and household contaminated water. There is the most used technique - adsorpti...
Poster
Full-text available
Pollution of aquatic ecosystems is a threat not only to the aquatic environment, but also to the vital activity of humans and all living organisms. A special place in this series is occupied by pharmaceuticals. Dehydrated zeolite is a microcrystalline “sponge” in which the pore volume is up to 50% of the volume of the zeolite framework. Such a stru...
Article
The article deals with the modified method of “hot-wall” beam epitaxy for obtaining the strained lead selenide nanolayers over a wide range of growth rates and controlling their thickness. With detection of the two-stage growth of the layers, the layers with high deformations – tangential lattice constants, and hence with high “negative” pressure w...
Article
Full-text available
The paper presents materials on the study of the effect of the complex fertilizer (zeolite + brown coal) on the development of a test plant (barley). The aim of the work was to study the possibility of improving the agrochemical and biological properties of the soil under the influence of complex fertilizer, the assessment of expediency and its lon...
Conference Paper
Full-text available
When solving the problem of recultivation of oil polluted soils, it seems more expedient to develop methods for stimulating the activity of native oil-assimilating microflora of polluted soil. This methods do not require laborious, costly operations associated with releasing, cultivation and introduction of a hydrocarbon-oxidizing microorganism cul...
Conference Paper
Full-text available
Nowadays, nanomaterials and nanotechnologies are used practically in all fields of agriculture: crop production, animal husbandry, poultry farming etc. The use of nano-products in crop production as micro-fertilizers provides an increase of productivity (on average 1.5-2 times) for almost all food cultures [1]. Zeolites are nanoporous crystalline s...
Article
Full-text available
Pollution of the soil by petrol is accompanied with a strong negative effect on plants due to changes in its physical-chemical properties, mainly due to an increase in hydrophobicity and the filling of soil capillaries with petrol and the direct toxic effect of petroleum hydrocarbons (phyto toxicity). Zeolite (clinoptilolite), is an ecologically sa...
Article
Full-text available
Economical effective complex fertilizers used for improving soil fertility can be produced in countries with suitable agricultural resources. The results of tests that were held on organo-mineral fertilizer, which consists of natural zeolite and brown coal of the Georgian origin are discussed in the article. The results obtained make it possible to...
Conference Paper
Full-text available
С каждым годом все больше внимания уделяется проблемам, связанным с загрязнением окружающей среды. Загрязнение нефтью и нефтепродуктами приводит к значительным изменениям физико-химических свойств почв и загрязняет подземные воды. В результате этого плодородный слой Земли в течение длительного времени не восстанавливается. Все больше сельхозпроизв...
Article
Full-text available
The paper discuses positive effect are of the utilization of non-traditional natural resources, the so-called agronomical ares, i.e. mineral fertilizers, in order to increase the productivity of crops and improve the physical and chemical properties of the soil. The effectiveness of such fertilizers is their complex positive influence on the proper...
Conference Paper
Full-text available
The paper discuses positive effect are of the utilization of non-traditional natural resources, the so-called agronomical ores, i.e. mineral fertilizers, in order to increase the productivity of crops and improve the physical and chemical properties of the soil. The effectiveness of such fertilizers is their complex positive influence on the proper...
Conference Paper
Full-text available
II Всероссийской научной конференции (с международным участием)
Conference Paper
Full-text available
Высокие сорбционные свойства некоторых природных цеолитов по парам воды, позволяют их использовать в качестве высокоэффективных осушителей жидких и газообразных систем. Для адсорбционной ёмкости большое значение имеет структура пор, из которых складывается общий адсорбционный объём цеолитов, а также их доступность для адсорбатов. Осушка при помощи...
Conference Paper
Full-text available
The world practice for recultivation work possesses the various methods of restoration of soil and water ecosystems. Pollution by oil and oil products leads to the significant changes in the physico-chemical properties of soil and destroys the water-air mode. More and more farmers are turning to the use of non-traditional mineral-raw material resou...
Conference Paper
Full-text available
Цеолиты, по сравнению со многими другими осушающими средствами, имеют ряд преимуществ: они характеризуются чётко выраженной гидрофильностью и селективностью к определённым соединениям, обладают молекулярно-ситовыми свойствами, легко регенерируются при нагревании (могут быть использованы многократно). Адсорбционная осушка широко применяется для очис...
Conference Paper
Full-text available
Natural zeolites are widely used in agriculture. Bringing mineral fertilizers along with zeolite provides the duration and reduces leaching of fertilizer and nutrition elements from the soil.
Article
Full-text available
On the basis of relevant research works, the paper discuses positive effect of the utilization of non-traditional natural resources, the so-called agronomical ores, i.e. mineral fertilizers, in order to increase the productivity of crops and improve the physical and chemical properties of the soil. The effectiveness of such fertilizers is their com...
Poster
Full-text available
Part of the nitrogenous fertilizers are either washed out of the ground or decomposed after introduction into the soil. Besides of the economic expenses, the process causes contamination of agricultural products and environment pollution that is ecologically dangerous. In order to reduce negative effects of nitrogenous fertilizers, to minimize thei...
Poster
Full-text available
Abstract: An ecological situation is one of the most important factors in the world that determines health of the nation. A wide application of economically suitable environmental technologies is necessary to solve the problems existing in Georgia, problems such as, detoxication of soil, restoration of natural earth covering and productivity. One o...
Conference Paper
Full-text available
В данной работе рассматривается возможность использования водородной формы природного цеолита – морденита, для удаления из табачного дыма летучих, канцерогенных веществ - N-нитрозоаминов. Была разработана и валидирована методика количественного определения N-нитрозоаминов в табачном дыме хромато-масспектрометрическим методом. Для изучения поглотите...
Article
For designing IR photodetectors based on strained PbSe layers, the optimization of the technology of molecular epitaxy with a "hot-wall" has been performed with the aim of fabrication of the layers with combining high values of residual deformation and thickness. By investigating the characteristics of layers such as the thickness, tangential latti...
Article
Full-text available
In the laboratory conditions, influence of the substrate based on brown coal and natural zeolite (clinoptilolite) on the biometric parameters of bean and barley germination has been investigated. In the first version the soil (object of comparison) was used as the standard. In the second version the substrate was produced by mixing 50% of finely-gr...
Conference Paper
Full-text available
The basic ambient air pollutant in Georgia is motor transport and the fraction of transport emission makes 71%; that for energy sector 25% and for industrial sector 4%. To solve this problem, sorptive properties of natural zeolites of Georgian origin (analcime, clinoptilolite, mordenite, philliosite) and their modified forms were studied by gas chr...
Conference Paper
Full-text available
In order to find out the basic sources of ambient air pollution in Georgia and determine the spectrum of the harmful substances, various sectors of the country’s economics have been studied and the portions from their emission have been established. To calculate the individual and total quantities of emissions of «the basic pollutants» from the var...
Article
Full-text available
The review paper is devoted to the analysis of work performed in the republics of the former Soviet Union, to identify the use of such mineral additives to animal feed, as natural zeolites. Despite the mixed results of several studies, as a whole, this supplement has a positive effect on the development and growth of poultry, in particular, on the...
Article
Full-text available
It is shown that, even in isoperiodic heterostructures, significant mismatch arises during the process of epitaxial growth because of interdiffusion of the components at the heteroboundary. As a result, nonradiative recombination at the formed defects increases, which significantly decreases the quantum yield of radiation. The heterostructures with...
Article
Full-text available
In order to achieve a planned objective, the following aspects are considered in the work: the basic sources of ambient air pollution in Georgia; dynamics of the emissions of harmful substances in the air from various economic sectors; ambient air quality monitoring system in Georgia; qualitative condition of ambient air of Georgia; characteristic...
Article
Full-text available
Zeolites are fine-porous sorbents widely used in the practice of gas chromatography for the separation of gas systems and mixtures of volatile organic compounds. However, capabilities of zeolites are limited because of small-sized "entrance apertures" (about 0,9 nm) that limitate of their application in the analysis of the organic compounds with si...
Poster
Full-text available
Currently, hothouse soils (substrates) consisting of different components are widely used in practice of plant growing for various agricultural crops [1, 2]. Number of components contained in the substrate nainly does not exceed four. Substrates can be conventionally divided into two groups: soil-containing and soil not containing; the priority is...
Article
Full-text available
On the basis of brown coal and natural zeolite (heulandite-clinoptilolite containing tuff) modified by ammonium and potassium cations a substrate has been developed; the bioproduction of plants grown on this substrate is 2.9 times higher than that grown on soil. This substrate is characterized by long continuous utilization in plant growing.
Article
Full-text available
The present work deals with the study on the distribution of contribution of adsorption and dissolution to retention volume of individual components in gas-liquid chromatography as dependent on the amount of liquid crystal stationary phase deposited on solid support and on the chromatographic column temperature.
Article
Full-text available
In this work the influence of some complex-forming compounds with cobalt and nickel cations dissolved in stationary liquid phase on its chromatographic characteristics is studed. The separation properties of stationary liquid phase PEG-1000 on the example of model systems of C2-C5 monohydrate alcohols and some aromatics and heterocycle combination...
Article
Full-text available
The influence of different factors on the distribution character of the contributions of adsorption and dissolving to adsorbate retention in the gas-liquid chromatography has been studied. It has been that adsorbate polarity, nature of the stationary phase, rate of impregnations, physical-chemical properties of that solid support and temperature o...
Article
Full-text available
Contribution of adsorption and solution in retention of organic compounds (saturated and aromatic hydrocarbons, monoatomic alcohols of normal structure) to their chromatography process has been determined. It was found that distribution of these contributions depends on the type of the solid support, degree of its loading by fixed liquid, nature of...
Article
Full-text available
In this work the adsorbtion-separational properties of the mesoporous molecular-sieves of type M41S and their forms modified with complex-forming cation of cadmium and thallium are investigated. This mesoporous material was used in the variant of surface-layer sorbents. The test mixture consists of some aromatic hydrocarbons. It is shown, that modi...
Article
Full-text available
INVESTIGATION OF THE SOLID CARRIER NATURE EFFECT ON CHROMATOGRAPHIC PROPERTIES OF A STATIONARY LIQUID Eprikashvili L.G., Dzagania M.A., Zautashvili M.G., Pirtskhalava N.V. and Tavamaishvili K.G. Georgian Engineering News. 1999, vol. 2. pp. P.Melikishvili Institute of Physical and Organic Chemistry The results of investigation of some solid carriers...
Article
Full-text available
Silicalite-1 (an adsorbent with molecular sieve effect, showing selectivity toward the para isomers) and the stationary phase 1,2,3-tris (cyanoethoxy)propane permit the simultaneous separation of multicomponent mixtures of isomers of benzene derivatives. The nature of the carder gas exert a marked influence on the retention times of certain compoun...
Article
Full-text available
Influence of complex-forming agents of silver and cadmium cations in conjugation with a liquid crystal hydroquinone-bis-(p-heptyloxybenzoate) used as a stationary phase was studied in the process of chromatographic separation of a mixture of certain isomers of derivatives of aromatic compounds.
Article
Full-text available
Influence of modifying pentasyl group synthetic zeolites (Silicalite-1 and Silicalite-2) with metal cations capable to specific interactions on the separation ability of the chromatographic column has been studied.

Network

Cited By