Geology

Research aim: The aim of research work is, under the conditions of the Bukhara oasis, to study Lemna minor, Pistia stratiotes and Azolla caroliniana aquatic plants in the laboratory conditions as well as conducting experiments on the production of high-yielded algaes in collective farms under the field conditions, reducing mineralization of collector-drainage water and improving water quality, studying the growth, development and productivity of crops as a result of improved irrigation with improved drainage water quality, development of scientific and practical recommendations for farms and water management organizations.
Study area: The study was carried out at the educational-scientific laboratory of the Bukhara branch of the Tashkent Institute of Irrigation and Agricultural Mechanization Engineers as well as at the Yulduz drainage, which flows through the territory of Bukhara province’s “Mohammad Chorukiy” farm.
Scientific novelty of the research: The scientific novelty of the study consists of the following items:
to determine highly-mineralized drainage systems in the Bukhara province and study their changes due to natural and anthropogenic impacts;
to study the effectiveness of Lemna minor, Pistia stratiotes and Azolla caroliniana aquatic plants, reduction of their drainage water mineralization in the laboratory conditions;
to study the effect of Lemna minor, Pistia statiotes and Azolla caroliniana regarding their reduction of drainage mineralization in small reservoirs;
to investigate the growth, development and productivity of cotton as a result of irrigation with improved quality of drainage water and prepare scientific and practical recommendations on the basis of the research.
Implementation of the research results: Based on the results of the research, reduction potential of the mineralization of collector-drainage waters by a biological method and their use in irrigated agriculture have been practiced on irrigated lands of farms of Bukhara, Ramitan, Peshku and Shafirkan districts of Bukhara province over an area of 133 hectares during 2014-2016 for irrigation of Bukhara-6 cotton sort (data of the Ministry of Agriculture and Water Resources №04 / 32-342 on February 17, 2017). At the same time, the negative effects of water deficit were reduced, a yield of 5.4-6.2 cc/ha of raw cotton was obtained and pollution of the surrounding environment was addressed.
Structure and the volume of the thesis: The structure of the thesis consists of an introduction, five chapters, conclusions, a list of references, and implementation. The volume of the thesis is 120 pages.

Subjects of research: the gold-sulphidc-arscnious deposit of Daughyztau in Western Uzbekistan.
Purpose of work: studying Au-forms, the typomorphic peculiarities of pyrite and arsenopyrite in the primary ores for development of prospectingestimating critcrions for the gold ores of daughyztau type.
Methods of research: traditional methods of a mineralogical investigation, EMP and XR-structural analyses.
The results obtained and their novelty: 1) a number of new minerals were established for the first time for the deposit; 2) the typomorphic crystallochcmical peculiarities of the pyrite and arsenopyrite were investigated; 3) the new morphotypcs of the productive sulphides and Au-content in them were studied; 4) the mctamorphogcnic-hydrothcrmal pyritc-sulphoarscnidc microassociation was detected; 5) prospecting-estimating critcrions for the gold orcs of daughyztau type have been elaborated.
Practical value: the results of the investigation can be applied into the practical activity of geological exploration and as a basis for the development of the method of refractory ores dressing.
Degree of embedment: the results of the research have been given to SE SIC “The geology of precious and colored metals”, SE “Daughyztau GE” and IMR for a practical appliance
Field of application: geology branch of science and production.

Subjects of the inquiry: different types of minerals, ores, sorts of industrial enterprises and manufactures and also standard samples of steels, colour metallurgy and other materials.
Aim of inquiry: elaboration of methods of amperometric and conductometric determination of the Pt(IV), Pd(II) и Au(III) by solution of thioacetamide on different by acid-base properties of phone electrolytes and buffer mixtures with high metrological characteristics and analytical parameters. Practical realization of elaborated electrochemical methods to analysis of some real natural objects and industrial materials.
Method of inquiry: potentiostatic culonometry, chemical methods,
conductometry, polayrographiya, voltamperometry, amperometric titration.
The results achieved and their novelty: voltamperometric behavour of thioacetamide and it's metallocomplexes on the platinium microdisk anode on different by nature and concentrations buffer solutions and phone electrolytes was investigated. Nature of limited anode currents and number of electronodonation oxidation of one molecule of thioacetamide were determinated and also the conditions of Pt(IV), Pd(II) и Au(III) determination by it's solution were optimized. On the base of obtained data the possibility of using of elaborated electrochemical methods to analysis of some real objects and industrial materials was shown.
Practical value: the possibility of amperometric and conductometric titration of Pt(IV), Pd(II) и Au(III) in model binary, triple and more complex mixtures imitating real natural objects and industrial materials by to using of different by nature and concentration phone electrolytes and buffer mixtures and high - sensitive reagent -thioacetamide was shown.
Obtained results have allowed to realize a choice of rational way of analysis of different by composition shlams, tails, standart samples and alloys, jewelry articles and others materials.
Degree of embed and economical effectivity: obtained experimental data by electrochemical titration of Pt(IV), Pd(II) и Au(III) by thioacetamide solution were tested and proposed to practical introduction in practices of analysis of laboratories Almalik mining - metallurgical combinate, Dehkanabad potassium facture of Kashkadarya region and also in educational process for bachelors and magistrs of inorganic and analytical chemistry of chemical faculty of NUUz after name M. Ulugbek, department on chemistry and chemical technology of Navoiy state mining institute, department of analytical chemistry of Samarkand state university after name A. Navoiy and department of chemistry-ecology and methodic of it's teaching of the Djizzak State pedagogical institute of the name A. Kodiriy.
Sphere of usage: analytical and physical chemistry, electrochemistry, protection of objects of environment, medicines, composition control of industrial materials and natural objects.