Actual problems of Mathematics, Physics and Mecanics
Actual problems in modern technical sciences
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Actual problems of Natural Sciences
SYNTHESIS OF NEW 2-ARYLQUINOLINE AMIDES
Quinoline amides based on 6’-aminodubamine and various aliphatic acids were synthesized. The structure of the synthesized compounds was proved by IR, mass, 1H and 13C NMR spectra. The synthesis of amides was carried out using two different methods....
3 July 2021, 21:56
BIOLOGICAL ACTIVITY OF 5-EXCHANGED AMINO-1,3,4-THIADIAZOL2-TIONS AND THEIR DERIVATES
The article deals with the search for new products of alkylation of 5-morpholino (phenylamino-, p-toluidino-)-1,3,4-thiadiazoline-2-tions with some alkyl halides (allyl bromide, benzyl chloride) and phenoxymethyloxyranes and their potassium salts. The results of the study of plant growth control,...
3 July 2021, 21:56
SORPTION-PHOTOMETRIC DETERMINATION OF LEAD (II) IONS BY IMMOBILIZED SODIUM 4-AMINO-5-HYDROXY-3 - ((E) - (4- NITROPHENYL) DIAZENYL) - 6 - ((E) -PHENYLDIAZENYL) NAPHTHALENE-2,7-DISULFONATE
The article shows the possibility of using sodium 4-amino-5-hydroxy-3 - ((e) - (4-nitrophenyl) diazenyl) - 6 - ((e) -phenyldiazenyl) naphthalene2,7-isulfonate, immobilized on polyacrylonitrile fiber PPD, as a reagent for the determination of lead ions. The optimal conditions for immobilization and...
3 June 2021, 21:55
MINERAL FERTILIZER STANDARDS IN COTTON SECTIONS EFFECT ON NPK QUANTITIES
In the article, the Aral Sea-Fed meadow of the Republic of Karakalpakstan-alluvial soil in the conditions of the exchange of planting systems through the results of the experiment devoted to the optimal fertilization system of determining the quantities of N, P, K of the main cotton, sunflower,...
3 May 2021, 21:55
SPECIES SPREAD OF ORDER LEPTOSPHAERIA Ces. & De Not. IN KASHKADARYA OASIS
The article studies species spreading of order Leptosphaeria Ces. & De Not., ecology and founding of plant species Salix alba L., Tilia cordata Mill. and Picea pungens Engelm. in Kashkadarya oasis. It is defined that 3 species of fungi such as Leptosphaeria baggei (Auersw. & Niessl) Sacc.,...
3 April 2021, 05:38
GEOGRAPHICAL FEATURES OF TOURISM AND ITS DEVELOPMENT IN KHOREZM REGION
Increasing the role of tourism in the economic development of our country in the context of deepening reforms, increasing its revenues and employment, is one of the main objectives of the government in the 21st century, the so-called “Tourism Age”....
3 April 2021, 05:38
SYNTHESIS OF COORDINATING COMPOUNDS OF NICKEL (II) FORMIATE WITH ZINC AND CALCIUM ACCETATES
Complex compounds of nickel (II) format with zinc and calcium acetates were synthesized. The composition of the synthesized compounds was determined by elemental analysis. The coordination of the reagents was analyzed on the basis of changes in the spectra in the IR and UV fields. Quantum chemical...
3 April 2021, 05:38
SOME ISSUES OF ORGANIZATION OF FISHERY AND INTRODUCTION OF CLUSTER SYSTEM
The article highlights the natural and economic-geographical foundations of the organization of fisheries in Central Fergana and some issues of the introducing the cluster system in the industry....
3 April 2021, 05:37
ECOLOGY OF THE JACKAL ORDINARY (CANIS AUREUS, L. 1758) IN THE CONDITIONS OF THE SOUTHERN ARAL SEA AREA
The article deals with the ecology of the jackal ordinary (Canis aureus l., 1758) in the conditions of the Southern Aral Sea region. Ordinary or Asian jackal (Canis aureus L., 1758) - belongs to the family Canidae and is one of the widespread and numerous species of the genus Canis....
3 April 2021, 05:37
THE WAYS OF USING GIS TECHNOLOGY IN STATE LAND CADASTRE
The article deals with the use of geographical information technology in the maintenance of the State Land Cadastre. The current geographic information systems focus on these processes through technical means equipped with special software capable of collecting the necessary information for them,...
3 April 2021, 05:37