Online ISSN: 2515-8260

Keywords : induction


About Research Of Spectra Of Own Oscillations Thin-Wall Plates In Magnetic Fields

Safarov Ismail Ibrahimovich; Esanov Nuriddin Kurbonovich; Almuratov Shavkat Narpulatovich; Safarov Ismail Ibragimovich; Esanov Nuriddin Qurbanovich

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 1109-1116

The paper considers the problems of natural vibrations of viscoelastic plates with different boundary conditions in magnetic fields.
The aim of the work is to study the oscillations of thin-walled structural elements in a magnetic field: to calculate the spectra of natural frequencies and vibration damping coefficients of rectangular viscoelastic plates with different conditions for fixing the edges, as well as to study the effect of the transverse and longitudinal magnetic field induction on the values of natural frequencies and damping coefficients, as well as their distribution. The validity and reliability of the results of the work is ensured by the correct statement of the problems, the use of applied mathematics metathemes, modern software and the comparison of the results with the results given in scientific publications. For calculations, mathematical packages MATLAB, software environment MAPLE-18 are used.
The paper first obtained analytical solutions for calculating the complex vibration frequencies of viscoelastic plates with a different combination of boundary conditions. A numerical analysis of the oscillations of rectangular viscoelastic plates with different conditions for fixing the edges is carried out, the influence of the transverse and longitudinal magnetic fields on the spectrum of complex frequencies is studied. New effects that the magnetic field exerts on the distribution of natural frequencies and the damping coefficient of the plate element structures are found.

NFLUENCE OF INDUCTION AND INHIBITION OF THE MONOOXYGENASE SYSTEM OF THE LIVER ON THE THYROID STATUS OF THE RAT'S BODY

Abzalova Sh. R.; Yuldashev N. M.; Rasulova M. T.

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 3, Pages 3235-3246

In order to assess the dependence of the thyroid status of the organism on the functional state of the monooxygenase system of the endoplasmic reticulum of hepatocytes in sexually mature male rats, induction and inhibition of the monooxygenase system of the liver by its inductors and inhibitors was caused. As inducers, we used known induction drugs - benzonal (benzobarbital) and zixorin (flumecinol), and as inhibitors a chemical compound - cobalt chloride and a blocker of histamine H2-receptors - cimetidine. Benzonal was administered orally at a dose of 50 mg / kg body weight for 3 days, and zixorin was administered at a dose of 40 mg / kg body weight for 4 days. Cobalt chloride was administered once intraperitoneally at a dose of 30 mg / kg of body weight, and cimetidine was administered orally at a dose of 100 mg / kg for 10 days. It was revealed that during the induction of the monooxygenase system of the liver by its inductors - benzonal and zixorin, there is an increase in the content of thyroid hormones - triiodothyronine and thyroxine in the blood against the background of no change in the level of thyroid-stimulating hormone. When the monooxygenase system of the liver is inhibited by its inhibitors - cobalt chloride and cimetidine, an increase in the content of thyroid hormones - triiodothyronine and thyroxine in the blood is also observed, but against the background of a statistically significant decrease in the content of thyroid stimulating hormone. It is concluded that there is an indirect relationship between the functional state of the monooxygenase system of the liver and the thyroid status of the body.