Доклады Академии наук Республики Таджикистан, том 56, №8, 2013 г.
|Article title and abstract||Pages|
Fractional evolution equations and dynamics memory
In this paper the fractional evolution equations with dynamics memory we studied. The proof of solvability and wellposedness of Cauchy problem for linear equations is a main result of investigations.
Key words: дробные эволюционные уравнения; функции Миттаг-Леффлера; дробная производная Капуто; fractional evolution equations; Mittag-Leffler function; fractional derivatives of Caputo.
|Shabozov M.Sh., Shabozova A.A.|
The quadrature formula of Markov type with the smallest estimation of remainder for one class functions
In the work for the classes of functions defined by the modules of continuity, the optimization problem is solved and where the search for the best quadrature formula of Markov type is done. It is proved that the optimal formula is a classic quadrature formula of trapezium and its exact error estimate for a given class of functions is calculated.
Key words: квадратурная формула типа Маркова; модуль непрерывности; погрешность; quadrature formula of Markov type; modulus of continuity; error.
On the class of sequences not uniformly distributed modulo one
The class of exponentially growing sequences that are not distributed uniformly modulo one have been constructed.
Key words: равномерное распределение по модулю единица; числа Фибоначчи; золотое сечение; критерий Г.Вейля; uniform distribution modulo one; Fibonacci sequence; golden ratio; Weyl’s criterion.
About the upper bound of variation of some classes of functions from their partial sums of Fourier-Chebyshev in
The sharp inequalities of Jackson-Stechkin’s type for averaged with the weight of specific modules of continuity of th order are obtained and defined by means of a generalized shift operator. For certain classes of functions in defined by these characteristics of smoothness and the upper bounds of the functions of the deviations of partial sums of Fourier-Chebyshev are calculated.
Key words: оператор обобщенного сдвига; модуль непрерывности m-го порядка; верхние грани; generalized shift operator; modulus of continuity of m-order; upper bound.
On optimal boundary control of forced oscillations of the displacements at the two ends strings
Key words: оптимальное граничное управление; вынужденные колебания; интеграл граничной энергии; optimal boundary control; forced oscillations; integral boundary energy.
|Moradi R., Hodjiboev Yu., Rahmonov R.O., Kukaniev M.A.|
The synthesis one of the derivatives of 2R-6-etilcarboxylate-7-phenyl 5-oxo-5H-1,3,4-thiadiazolo-[3,2-a]-pyrimidine
In this article the synthesis of some new derivatives 2R-6-carboxylate-7-phenyl-5-oxo-5-H-1,3,4-thiadiazolo [3,2-a]-pyrimidine through cyclization of 2-amino-5 R -1,3,4-thiadiazole with ethyl 4,5-dioxo-4H-5H-2-phenylfuran-3-carboxylic acid, which is obtained from 2-phenyl-4 ,5-dioxo-4H-5H-furan-3-carboxylate are presents. The structures of the compounds obtained are set Н
Key words: 2R-6-этилкарбоксилат-7-фенил-5-оксо-5Н-1,3,4-тиадиазоло-[3,2-а]-пиримидин; 2-амино-5R-1,3,4-тиадиазол; синтез; реакция; 2R-6-carboxylate-7-phenyl-5-oxo-5H- 1,3,4-thiadiazolo [3,2-a]-pyrimidine; 2-amino-5R-1,3,4-thiadiazole; synthesis; the reaction.
|Khalikov D.Kh., Gorshkova R.M., Makhkamov Kh.K., Muhidinov Z.K.|
Activation energy of protopectin degradation in the hydrodynamics flow
The article describes a result of catalytic degradation of protopectin (PP) from sunflower head residue in the hydrodynamics flow of hydrochloride solution via galacturonic acid analysis from solution fraction in columns mode. Experimental data are treated by consequence degradation reaction of PP to MG and PS in the dynamics flow. The kinetics data results in determination of the rate constant and activation energy of the process.
Key words: протопектин; пектиновые вещества; корзинка подсолнечника; кинетика в потоке; скорость реакции; константа скорости реакции; энергия активации; protopectin; pectin substances; sunflower head residue; kinetics rate in flow; reaction rate; rate constant; activation energy.
|Rakhimov Kh.A., Abulkhaev V.D., Ganiev I.N., Ubaydov S.O.|
Magnetic properties of alloys of Gd
The abstract comprises the results of investigation of magnetic properties of solid solutions which have been formed in the Gd
system. Crystallochemical investigations have shown, that solid solutions of the Gd
system crystallizes in rombic Y5Bi3 structural type. Values of Curie temperatures and magnetic moment of Gd
ions was defined.
Key words: сплавы; диаграмма состояния; твёрдые растворы; температура Кюри; магнитная восприимчивость; магнитные моменты; alloys; state diagram; solid solutions; Curie temperatures; magnetic susceptibility; magnetic moment.
|Mirsaidov I.U., Nazarov Kh.M., Rakhmatov N.N., Salomov F.J., Nazarov Sh.B.|
Physico-chemical characteristics of bifunctional sorbent from vegetable raw materials
Shells’ sorption capacities for nuts, apricots, Archa’s thuja and dull ends of pines at room temperature in dynamic regime are studied. It is determined that biomasses have good sorption properties and concentrating uranium. Big sorption volume makes them one of the perspective materials for development of cheap sorbents.
Key words: уран; сорбция; биомасса; динамическая обменная ёмкость; uranium; sorption; biomass; dynamic exchange volume.
|Boboev B.D., NAzarov Kh.M., Khakimov N., Ermatov K.A.|
Concentration of radon in air in some residential and working placement of Chkalovsk and Kayrakkum cities
In this work radon concentrations measurements in living space and workroom air are presented. Measurements results analysis revealed that radon-222 concentration in the air of investigated premises is within the scope of 18-46 Bq/m
, which is lover that established limit for operating (200 Bq/m
). Radiation absorbed dose from radon and its decay products are within the scope of 1-2 mSv for investigated premises.
Key words: радон; объёмная активность (ОА); дозовые нагрузки; эквивалентная равновесная объёмная активность (ЭРОА) радона; radon; volume activity; dose loading; Equivalent equilibrium volume activity.
Analysis of life forms of the flora of the Central Pamir-Alai
The article provides results of the analysis of life forms of the flora of the Central Pamir-Alai, their quantitative and qualitative characteristics. The floristic composition of the Pamir - Alai is divided into 8 types of life forms: 79 species of trees, 175 species of shrubs, 19 species of low bush, 83 species of dwarf semishrubs, 1397species of plurannual grass, 104 species of biennials, 770 species of annuals, 514 of which are ephemeras, 256 species of ephemeroides.
Key words: Памиро-Алай; жизненная форма; многолетники; двулетники; однолетники; эфемеры; эфемероиды; кустарники; полукустарнички; Pamir-Alai; life form; plurannual; biennial; annual; ephemerae; ephemeral; shrubs; dwarf semishrub.
|Negmatov M.N., Rijov S.V., Abdullaev Kh.A.|
Usage of the embrio test for the analysis of fertile and sterile ovules in flowers ovary of cotton
In this article the results of comparative analysis of the number and viability of the ovules in ovary flowers of four cotton species G.herbaceum L., G. arboreum L., G.hirsutum L. and G.barbadense L., distinguish by ploidy of the genomes are given. For the first time with usage of the squash preparation and specific coloration receive of the original photography of the entrance process of pollen tube into fertile ovules.
Key words: хлопчатник; диплоидные виды; семяпочка стерильная и фертильная; cotton; diploid species (Gossypium herbaceum L., Gossypium arboreum L.); allotetraploid species (Gossypium hirsutum L., Gossypium barbadense L.); fertile and sterile ovules; аллотетраплоидные виды.
|Kuzibaeva N.K., Tadjibaeva Z.A.|
Bacterial endocarditis for children which congenital heart defects
For the diagnostics of infections endocarditic in children which congenital heart defects, plays an important role ehocardiography and hemoculturing. In treatment of infections endocarditic in the main roll comes the prescription of antibiotics of corded range up to 6 months.
Key words: врожденные пороки сердца у детей; бактериальный эндокардит; диагностика; лечение; congenital heart defects in children; bacterial endocarditic; diagnostics; treatment.
|Mirojov G.K., Avezov S.A., Amirkulova M.M., Tuhtaeva N.S., Alimova N., Shamsiddinov Sh.N.|
The role of cytokines in chronic pancreatitis with obesity
Cytokine-related mechanisms of pancreatitis in 25 patients (8 men and 17 women aged 32-56 years) with abdominal obesity (body mass index over 26 kg/m
) are studied. The average content of C-reactive protein (CRP) in patients with obesity was 5.52 ± 1.24 vs 1.54 ± 0.29 mg / l in healthy. During exacerbation of chronic pancreatitis and CRP significantly, and the median was 5.8 times higher than in patients without chronic pancreatitis. IL-6 and tumor necrosis factor also had higher scores than the comparison group. The content of IL-8 in patients with chronic pancreatitis was increased by only 22% compared with the normal and did not differ from those of the first group of patients level of anti-inflammatory cytokine - IL-10 in serum of patients was significantly increased by 57% relative to that of the group compare. Indicators of TNF, IL-6, IL-8 and CRP were positively correlated with the clinical manifestations of chronic pancreatitis. Increased synthesis of pro-inflammatory cytokines and a simultaneous increase in the content of C-reactive protein proved their undoubted role in the development of inflammation of the pancreas in patients with obesity.
Key words: хронический панкреатит; абдоминальное ожирение; цитокины; chronic pancreatitis; abdominal obesity; cytokines.
|Sufishoev G., Odinaev F.I., Fayzullaev H.T., Odinaev Sh.F., Igamova M.G.|
Medico-social aspects of primary disability owing to coronary heart disease in the Republic of Tajikistan
In the Republic of for the first time it is recognized as disabled people owing to coronary heart disease 3740 people aged from 30 till 75 years, including 2744 men and 996 women.It is established that ischemic heart troubles takes a leading place in disability structure from cardiovascular diseases. Absolute majority for the first time recognized disabled people owing to coronary heart disease of the person of the able-bodied age, having an average, secondary vocational and higher education. Most often for the first time is established by III and the II groups of disability.
Key words: ишемическая болезнь сердца; инвалидность; coronary heart disease; disability.