Online ISSN: 2515-8260

Keywords : Density


Stationary Flow Of A Viscous Fluid In A Flat Channel With Permeable Walls ( In The Example Of Blood Circulation )

Navruzo Kuralbay Professor; Begjanov Amirbek Shixnazarovich; Khujatov Nurbek Jumaboyevich

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 3, Pages 2731-2738

This article is devoted to the study of the stationary flow of a viscous fluid in a flat channel with permeable walls. As is known, in a pulsating flow in pipelines, a pressure wave propagates through its walls, which is called a pulse wave. This wave, as it moves away from the initial cross section, gradually weakens and practically attenuates at the ends. In the present work, stationary flows of a viscous fluid in a plane channel with permeable walls are considered to be sufficiently long for the channel. The problems are solved and calculation formulas for determining the longitudinal and transverse speeds are obtained. Formulas are also found and numerical calculations are made that determine the change in pressure and fluid flow in the direction of the main stream for various values of the permeability coefficient. It is shown that at lower values of the coefficient of permeability, the pressure is distributed along the flow according to linear laws, and the fluid flow rate remains almost constant along the channel length. Other values of the permeability coefficient, it is characteristic that with an increase in the permeability coefficient of the pressure distribution differs significantly from the linear distribution, with the maximum deviation in the middle of the channel. The fluid flow rate with an increase in the permeability coefficient increases several times in the initial section compared to the fluid flow rate, in the same pressure drop in the flow of a viscous fluid in a flat channel with impermeable walls.

Distribution Of Free Proline In Rice Stalk And Roots Grown Under Aluminium Toxic Soil

Prasann Kumar; Purnima .; Premasis Sukul

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 2651-2663

The harmful amounts of metals in soils may be related to natural vegetation due to planting, manufacturing, mining, and waste management activities. Many of the acidic soils below pH 5.0 are essential growth restricting factors in plants, pH value as large as 5.5, however, may be easily reached. The issue is especially bad in extremely acidic subsoils that face trouble during liming and are aggravated by strongly acidic nitrogen engravings. The strong acidity in the subsoil (AI toxicity) decreases height of the plants, increases drought susceptibility and decreases the use of subsoil nutrients. The high temperature exacerbates aluminum toxicity d in cotton and wheat. The treatments T4, when compared with T1, showed that Fibroin NPs decreased the total free proline in rice stalk by only 14.19% whereas KNO3 NPS in T5 enhanced the same by 39.92% when applied along with Aluminium stress. The total free proline in rice stalk was significantly enhanced by about 9.88% concerning T1 when treated with Fibroin NPs upon Aluminium stress whereas only sole Fibroin NPs were applied (T6). KNO3 Nanoparticles when applied upon Aluminium stress (T6). The total free proline in rice roots was significantly decreased by about 17.39% concerning T1 when treated with Fibroin NPs upon Aluminium stress whereas only sole Fibroin NPs were applied (T6). KNO3 Nanoparticles when applied upon Aluminium stress (T6).

Energy Dependence Of Mass Attenuation For Sodium Based Silicate Glasses

Rajinder Singh Kaundal; Romi Bharol

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 3471-3474

The theoretical studies are carried out to get the idea of the mass attenuation values at varying energies of gamma ray photons. For this purpose sodium basesd silicate glasses are studied with the NIST XCOM, further the density values are analysed to see the impact of varying sodium composition. To understand the effect of varying composition of metal cation in altering the structure of glass, molar volume values are evaluated and analysed.