Доклады Академии наук Республики Таджикистан, том 57, №5, 2014 г. |
File | Article title and abstract | Pages |
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Download | Rakhmonov Z.Kh., Ismatov S.N. | 347-351 | The distribution of fractional parts of {
}, with argument running through the primes from a short interval |
An asymptotic formula was obtained for , where denotes the number of terms in the sequence , , , that satisfy and when and . |
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Key words: короткая тригонометрическая сумма; распределение дробных частей; асимптотическая формула; простое число; short exponential sum; distribution of fractional parts; asymptotic formula; prime. | |
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Download | Faraydunov O.Q. | 352-362 | On approximation by Fourier-Chebyshev sums in
and the value of widths of some classes functions |
In the Hilbert space square-integrable functions with the Chebyshev of weight we obtain exact inequalities of Jackson - Stechkin linked to the best approximation of subspace of - algebraic polynomials degree is a generalized modulus of continuity of the th order , where - some second order differential operator. For certain classes of functions which are defined by the specified moduli of continuity, the exact values of -widths in the space are calculated. |
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Key words: наилучшее приближение; полиномы Чебышёва; обобщённый модуль непрерывности m-го порядка; коэффициенты Фурье-Чебышёва; n-поперечники; best approximation; Chebyshev polynomials; generalized modulus of continuity m-th order; Fourier-Chebyshev coefficient; n-widths. | |
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Download | Safarov D.S., Saidnazarov R.S. | 363-369 | Double periodic solutions of one elliptic systems of higher order |
In the paper find of double periodic solutions of one elliptic systems of higher order with the constant coefficient with the help elliptic functions. |
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Key words: двоякопериодическая функция; решение; эллиптическая система; doubleperiodic function; solution; elliptic; equations. | |
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Download | Ergashbaev T. | 370-374 | Branching off the solution of non-linear equitation in space functions of diversities |
The article deales with the description of theory of branching off non-linear equations which are the invariants towards some groups of symmetry. Equation of the branching off the groups SO(2) and O(2) have also been studied. |
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Key words: уравнение разветвления; инвариантность; группа; бифуркация; действие группы; нелинейное уравнение; Branching off; equation; invariant; group; bifurcation; group action; nonlinear equation. | |
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Download | Salikhov T.Kh., Rakhimi F.K. | 375-381 | Dynamics of formation of optoacoustic pulses of the first and second sound in He-II, excited by a rectangular pulse of laser radiation by the thermal mechanism |
A theory of the generation of optoacoustic (OA) of the pulses of the first and second sound in superfluid helium by the rectangular pulse of laser radiation generated due to the thermal mechanism has been presented. Found that all of the exciting pulses are formed in competition pulses generated when you turn on and off the beam and having opposite phases. Numerical results showed that all generated OA - pulses have bipolar shape, and at the desire of the beam pulse width, due to the coincidence of the position of the two poles, OA - pulses disappear. |
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Key words: оптоакустика; сверхтекучий гелий; второй звук; тепловой механизм; прямоугольный импульс; optoacoustic; superfluid helium; second sound; thermal mechanism; rectangular pulse. | |
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Download | Niezov H.H., Ganiev I.N., Berdiev A.E. | 382-385 | The influence on praseodymium on kinetics of the oxidation of the hard alloy AK1M2 |
By thermogravimetric method the interaction praseodymium AK1M2 alloy with oxygen in the range of 723-823K are studied. The kinetic parameters of the oxidation process shown that the addition of praseodymium reduce the rate of oxidation, which is accompanied by an increase in the magnitude of apparent activation energy of oxidation from 114.93 to 153 kJ/mol. |
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Key words: сплав АК1М2; празеодим; термогравиметрический метод; кинетика окисления; истинная скорость окисления; энергия активации; AK1M2 alloy; praseodymium; thermogravimetric method; oxidation; kinetics of the oxidation; rate is the true activation energy. | |
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Download | Rakhimov Kh.A., Abulkhaev V.D., Ubaydov S.O., Nazarov Kh.Kh., Ganiev I.N. | 386-390 | Electrophysical properties of bismuthides Ln
bi
(Ln=Gd, Tb, Dy, Ho, Er, Tm, Lu) |
The article comprises the results of investigation of electrophysical properties (electrical resistivity, and thermoelectric power) of bismuthides Ln
Bi
(Ln=Gd, Tb, Dy, Ho, Er, Tm, Lu) at temperature range 298-773 K. Crystallochemical investigations have shown, that of bismuthides Ln
Bi
(Ln=Gd, Tb, Dy, Ho, Er, Tm, Lu) crystallizes in rhombic Y
Bi
structural type. Established that the bismuthides display metallic conductivity. |
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Key words: висмутиды; удельное электросопротивление; термо-э.д.с; синтез; диаграмма состояния; bismuthides; electrical resistivity; thermoelectric power; synthes; state diagram. | |
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Download | Djuraev T.J., Hodjaev F.K., Muslimov I.Sh., Mahmadulloev H.A. | 391-394 | Assessment of the degree of certainty of double phase diagrams of systems lead with elements of the periodic table |
The analysis of literature data on the double phase diagrams of lead with elements of the periodic table (FRI). It is found that from 91 systems Pb-e (element) was studied and constructed diagrams for 50 systems. In most cases, charting the state are determined using cleaner source materials and modern methods of physical-chemical analysis and thermodynamic calculations on a computer. |
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Key words: диаграммы состояния; свинец; периодическая таблица элементов; механическая смесь; химическое соединение; ограниченная взаимная растворимость; монотектический тип взаимодействия; state diagrams; lead; periodic table of the elements; a mechanical mixture; the chemical compound; limited mutual solubility; monotektik type of interaction. | |
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Download | Samikhov Sh.R., Zinchenko Z.A. | 395-400 | Kinetics of the chloride sublimation process of Taror’s deposit gold containing concentrate |
The results of the kinetics chloride sublimation process of Taror
s deposit concentrates studies are presented. Computable calculated energy of activation (73.568 кD/mol) is indicative of process in kinetic area. |
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Key words: кинетика; температура; энергия активации; хлоридовозгонка концентратов; руда; извлечение; месторождение; kinetic; temperature; energy of activation; chloride sublimation; concentrate; gold containing ores; extraction; dissolution. | |
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Download | Kodirov S.H.A., Haydarov K.H., Yakubova M.M., Kadirov A.H., Kholov U.K. | 401-407 | Synthesis and pharmaco-biochemical studies “Ursoslit” |
In this paper the method of synthesis and a drugs material “Ursoslit”s was presented and investigated the holylipotic, hypoholeterinic and hypolipiddemic characters of them. The results of the synthesis and pharmacological biochemistry “Ursoslit” shows its distinctive character form “Ursofalk”s. |
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Key words: синтез 3α,7β-дигидрокси-5β-холановой кислоты; экспериментальные лабораторные животные; пропан-1,2-диоловый эфир 3α,7β-дигидрокси-5β-холановой кислоты; Урсослит; газовая хроматография; Syntesis of 3α,7β-hidroxy-5β-cholaic acid; the experimental laboratory animals; propane-1,2-diol ester 3α,7β-hidroxy-5β-cholaic acid; Ursoslit; gas chromatography. | |
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Download | Babajanova M.A., Esanalieva Sh.A., Mirzorakhimov A.K., Narzulooev M.S., Nematova N., Saifutdinov A.K. | 408-412 | The effect of kinetin in vitro on ribulose-bisphosphate carboxilase/oxygenase activity of Calvin cycle multienzyme complexes in cotton leaves extracts |
The article presents the results of experimental studies on the effect of different concentrations of kinetin (6- benzylaminopurine) on the activity of ribulose bisphosphate carboxylase/oxygenase in the presence of ribose-5-phosphate + ATP. The concentrations of kinetin in which it manifested the greatest stimulatory effect on the carboxylase activity of Rubisco multi-enzyme complex were defined. Analysis of values of an activating effect of kinetin on the activity of phosphoribulokinase and ribulose bisphosphate carboxylase/oxygenase upon using their own specific substrates and in the presence of ribose-5-phosphate + ATP indicates the coordinated regulation of the activity of enzymes in multi-enzyme complexes. |
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Key words: хлопчатник; кинетин; рибулозобисфосфаткарбоксилазная активность; мультиферментный комплекс; цикла Кальвина; cotton; kinetin; ribulose bisphosphate carboxylase/oxygenase activity; multi-enzyme complex; the Calvin cycle. | |
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Download | Akobirova S.A. | 413-417 | Comparative effectiveness of surgical trtatment with different accesses in patients with ovarian tumor |
The resuets of comporativa effectivenus of ovarian tumors sugary treatment with using different accesses was presented. There were showed that all characteristics of effectivenus operations with laparoscopic access is better than operations with laparotomic access. The contentment in patients with laparoscopic operations was higher thar in patients with laparotomic operations. |
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Key words: лапаротомия; лапароскопия; опухолевидные образования яичников; характеристики эффективности; laparotomic; laparoscopi; ovarian tumors; comporativa effectivenus. | |
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Download | Sobirov A.J., Makhmadov F.I., Gulahmadov A.D., Kurbonov K.M. | 418-424 | Functional disorders of the liver and lungs in patients with hepatic echinococcosis subdiaphragmatic |
An analysis of results of surgical treatment of 76 patients with hepatic echinococcosis subdiaphragmatic are presents. Results of the study showed that hydatid disease of the liver accompanied by considerable destruction of hepatocytes, impaired performance of proinflammatory cytokines and nitric oxide , especially in complicated and subdiaphragmatic localization, indicating that the liver and lungs. At the same time as the increase in EC subdiaphragmatic space and duration of the disease is largely disturbed ventilation and gas exchange function of the lungs. The authors recommend that patients with PEP advisable preoperatively of pathogenesis based antigipoksicheskoy therapy, largely improving the functional state of the liver and lungs. |
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Key words: поддиафрагмальный эхинококкоз печени; индикаторные ферменты печени; провоспалительные цитокины; оксид азота; вентиляционная и газобменная функции легких; subdiaphragmatic hydatid disease of the liver; liver enzymes indicator; proinflammatory cytokines; nitric oxide; ventilation and gazobmennaya lung function. | |
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Download | Rustamova M.S., Muradov A.M., Rajabova S.A., Rahmonova S.I., Sirojeva L.D. | 425-431 | Сomponents and manifestations of Metabolic Syndrome in women with infertility |
Presented identified components and clinical manifestations of the metabolic syndrome (MS) in women with infertility, as visceral obesity, insulin resistance, oxidative stress, dyslipidemia, acanthosis Negroid and steatosis. Metabolic changes are found as in women with polycystic ovary syndrome, and at hyperprolaktinemia, luteal phase deficiency, hyperandrogenism. The results indicate the need for early detection and correction of metabolic abnormalities in patients with infertility, to improve the effectiveness of treatment to restore fertility. |
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Key words: abdominal obesity; infertility; insulin resistance; metabolic syndrome; polycystic ovarian syndrome. | |
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