of National Academy of Sciences
of Tajikistan

Reports of the National Academy of Sciences
of Tajikistan

Доклады Академии наук Республики Таджикистан, том 61, №07-08, 2018 г.

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Rakhmonov Z.Kh., Azamov A.Z., Nazrubloev N.N.
Of short Weyl sums on minor arcs
A non-trivial estimate is obtained on minor arcs for the short Weyl sums of the form

Key words: short Weyl exponential sum; minor arcs; divisor function; diophantine equation.

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Shabozov M.Sh., Saynakov V.D.
On Kolmogorov type inequality in Bergman space for functions of two variables
In this paper the Kolmogorov type of inequality for the analytic functions belonging to the Bergman space in a unit bicircle were founded.

Key words: Kolmogorov type inequality; Bergman space; quasipolynom; the best approximation.

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Kokhirova G.I., Buriev A.M., Khamroev U.Kh., Bakanas E., Mullo-Abdolov A.Sh., Abdulloev S.Kh.
Observations of comet 41P/Tuttle-Giacobini-Kresak in the Tajikistan astronomical observatories at the period of close approach to the Earth
Quasisynchronous astrometric and photometric observations of short period Jupiter family comet 41P/Tuttle-Giacobini-Kresak were carried out in the International Astronomical Observatory Sanglokh (IAOS) and Hissar astronomical observatory (HisAO) of the Institute of Astrophysics, Academy of Sciences of Tajikistan, during its close approach to the Earth on April 2017. The comets coordinates were determined and the orbit was calculated, apparent and absolute magnitudes in BVRI bands as well instrumental color indexes of comet were found, the effective diameter of the cometary nucleus was estimated. The results of observations in IAOS and HisAO are in good agreement between each other and are consistent with the data of world observations.

Key words: comet; astrometry; photometry; coordinates; orbit; light curve; color index; diameter.

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Rahimi F., Abdulloev Kh.O., Devonakulov Sh.A.
Obtaining nonlinear equations taking into account perturbations and their solutions in the theory of condensed media
Based on simple examples from the physics of the condensed state, a technique of reducing physical models to a system of differential equations is demonstrated. Solutions are obtained that describe particle-like perturbations in quasi-one-dimensional systems.

Key words: nonlinearity; classical models; soliton; quasi-one-dimensionality; probability; evolution; dispersion; particle-like; perturbations; quantization.

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Gulov B.N., Majidi M., Nizomov Z., Ismoilov R.A.
In this article the results of the study of thermal properties of Pb+0.03% Ag alloy under the action of microseisms and isolation from them are presents. It is shown that under the action of microseisms coefficient of convective heat transfer and thermal radiation increase.

Key words: .

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Mulloev N.M., Hodiev M.H.
Self-association and IR-spectra of some derivatives of triazols in solid condition
The influence of structural elements introduced into the molecular cycle on the spectral parameters of triazole derivatives was studied. It is shown that the addition of an aromatic character, structural elements to the original five-membered compound leads to a significant change in the electronic environment of the oscillating group. This is due to the change in the configuration of the electron cloud of the group when radicals are introduced, as a result of which the force coupling constant changes and, consequently, the oscillation frequency.

Key words: triazole derivatives; IR spectra; unlocked electron pairs; self-association; induction effect.

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Soliev L., Usmonov M.
Phase balances of Na,Ca// SO,CO, F-HO system in 50°C
Phase balances Na,Ca// SO, CO, F-HO are studied using the broadcasting method under 50°C. It is established that 25 squires of divariants, 22 lines of monovariants and 8 points on nonvariants are typical for phase balances. It is the first time that its tied of phase balances are built.

Key words: translation method; phase balances; system; connected diagram; component's; nonvariants points; lines of monovariants; squaires of divariants.

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Abdusalyamova M.N., Makhmudov F.A., Shaimardanov E.N.
Receipt and properties of monostructured holmium oxide
Nanostructured powders of holmium oxide (HoO) with sizes CSR 6, 10, and 16 nm were obtained by using precursors of acetate and holmium carbamide.

Key words: nanostructured holmium oxide; lattice parameter; ТГА; IR and RS spectroscopy.

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Kurbonov A.S., Barotov A.M., Juraev J.D., Nazarov Sh.B., Mirsaidov U.М.
Studying of the kinetical process of the hydrochloric acid decomposition of burned out of original borosilicate ore with calcium chloride
The results of the study of kinetically process of the hydrochloric acid decomposition of the burned ore during the joint burned out of the original borosilicate ore from Ak-Arkhar field of Tajikistan with calcium chloride are present.

Key words: borosilicate ore; processing; burn out; decomposition; extraction; kinetic; calcium chloride.

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Safarova F.R., Ganiev I.N., Odinaeva N.B., Obidov Z.R.
Kinetic oxidation of Zn5Al alloy, doped with gallium, in the firm condition
In this paper the results of research kinetic oxidation of Zn5Al alloy, doped with gallium, in a firm condition are resulted. Showed that additives of gallium slightly increase oxidability of the initial alloy.

Key words: Zn5Al alloy; gallium; thermo gravimetrical method; oxidation of alloys; speed of oxidation; energy of activation.

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Felaliev A.S., Shomamadova Z.D., Mahramov A.M.
Some morphobiological and biochemical indices of fruits of perspective local forms of walnut of greece (Juglans regia L.) in the condition of Western Pamir
In this article the results of years of research for the study of morphological parameters of fruits and the oil content in the kernel of promising forms of walnut in the Western Pamirs are presents.

Key words: form; the fruit of walnut; oil content; kernel yield; perspective forms; excretion and kernel taste; Western Pamir.

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Djurabaeva M.O.
Growth and development of the conifer plants in Nortern Tajikistan
For the first time, a comparative study of the growth and development of 12 species of conifers plants was carried out in the environmental conditions of Northern Tajikistan. Is established that in Northern Tajikistan it is possible to introduce and successfully grow the following species of conifers plants: Pinus eldarica Ten., Pinus pallаsiana Lamb., Cupressus sempervirens L., Cupressus arizonica Green, Thuja orientalis Endl., Thuja occidentalis L., Juniperus virginiana L., Juniperus seravschanica Kom., Juniperus turkestanica Kom.

Key words: Northern Tajikistan; conifer plants; growth; development.

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Amonov Sh.Sh., Yuldoshev H.F., Kurbonova M.O., Gulmurodov T.G.
Diagnosis and results of surgical treatment of patients with mitral valve restenosis
This work is based on the results of a comprehensive clinical, laboratory, instrumental methods of research of 43 patients with restenosis of the mitral valve in the department of cardiac surgery of the Republican scientific centre of cardiovascular surgery for the period from 2009 to 2017. Preoperative preparation and surgical treatment of patients with mitral valve restenosis significantly reduces the risk of surgical and anesthetic complications in the postoperative period and accompanied by improve of Echo parameters of heart chambers size, respiratory functions and EKG changes.

Key words: restenosis of mitral valve; mitral valve replacement; respiratory functions; Echo.

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Ferubko E.V., Nikolaev S.M., Pupykina K.A., Dargaeva T.D.
In this work the results of study of antiulcerous activity of complex plant extract are presented. It is established that course introduction of per os of extract in a dose of 150 mg/kg to white mice. The received results demonstrate antiulcerous activity of complex plant extract and are of great interest to clinical practice, reason expediency of its use as a part of the used technologies of treatment of patients with a peptic ulcer and also at a recovery stage that will increase efficiency of the held treatment and prophylactic actions.

Key words: ulcer disease; plant extract; antiulcerogenic activity.

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Bortnikova V.V., Krepkova L.V., Trumpe T.E.
A comparative study of the hepatoprotective action bupleurum aureum Fisch. ex Hoffm. extract dry and carsil
A comparative study of hepatoprotective action Bupleurum aureum Fisch. ex Hoffm. extract dry and Carsil on rats with experimental model of acute intoxication with corrosive sublimate. It is shown that the degree of severity of hepatoprotective action on this model of liver pathology Bupleurum extract dry at a dose of 10 mg/kg was slightly higher than Carsil, currently the most widely used in medical practice hepatoprotector.

Key words: Bupleurum aureum Fisch. ex Hoffm; extract dry; Сarsil; model sublimate acute intoxication; rats; hepatoprotective effect.