scholarly journals ULTRASONIC ACTION ON THE MICROORGANISMS CELLS

2021 ◽  
Author(s):  
Iryna Z Koval ◽  
Keyword(s):  
Ultrasonic Action

Use of neutron generators for monitoring the increase in petroleum recovery from wells due to ultrasonic action

Atomic Energy ◽  
2004 ◽  
Vol 97 (3) ◽  
pp. 653-656 ◽  
Author(s):  
Yu. F. Zhuikov ◽  
V. N. Pryakhin ◽  
A. E. Shikanov ◽  
E. A. Shikanov
Keyword(s):  
Ultrasonic Action ◽  
Neutron Generators

scholarly journals Intensification of the extraction process of phenolic compounds from Acorus calamus leaves

2021 ◽  
pp. 4-10
Author(s):  
Oleksiy Andryushayev ◽  
Olena Ruban ◽  
Yuliia Maslii ◽  
Inna Rusak
Keyword(s):  
Phenolic Compounds ◽  
Raw Materials ◽  
Extraction Process ◽  
Raw Material ◽  
Acorus Calamus ◽  
Optimal Conditions ◽  
Ultrasonic Action ◽  
Different Temperatures ◽  
Method Of Extraction ◽  
Temperature Time

The aim. To determine the intensified method of extraction of phenolic compounds from Acorus calamus leaves and optimal conditions for the process. Materials and methods. In order to develop the optimal intensified method of extraction samples were prepared in different conditions of raw materials-extractant ratio, temperature, time and multiplicity. As a raw materials spectrophotometrically pre-standardized Acorus calamus leaves were used. The extraction was carried out in a hermetically sealed ultrasonic extraction reactor PEX 1 (REUS, Contes, France). As the criteria of extraction efficiency were indicators of dry residue and total amount of flavonoids determined using methods described in State Pharmacopoeia of Ukraine. The amount of flavonoids was determined spectrophotometrically on a certified device Specord 200 (Analytik Jena, Germany). Results. According to our research results it was found that ultrasonic action and addition of surfactant significantly improves the efficiency of the extraction process. The optimal conditions for the process were determined. Experimentally proved that the rational raw material-extractant ratio is 1:15. Comparative study of the extraction process with different temperatures showed that the highest amount of extractives is achieved at temperature 70 °C and 45 min of duration. The optimal extraction multiplicity is 3. Conclusions. As a result of the study, the intensified extraction method for Acorus calamus leaves – re-maceration with ultrasound – was established. The conducted researches allowed to develop the method of extraction, expedient in the conditions of the modern pharmaceutical industry.

Microstructure of Filled Biocomposites Based on Polyolefin Blends

2020 ◽  
Vol 992 ◽  
pp. 369-374
Author(s):  
Elena E. Mastalygina ◽  
A. Anpilova ◽  
A.A. Popov
Keyword(s):  
Uniform Distribution ◽  
Vinyl Acetate ◽  
Microcrystalline Cellulose ◽  
Mechanochemical Treatment ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Ultrasonic Action ◽  
Polyolefin Blends ◽  
Study Results

Binary and ternary composites based on low-density polyethylene and a copolymer of ethylene and vinyl acetate with / without the addition of microcrystalline cellulose have been investigated. The analysis of microstructure of the filled composites has shown more uniform distribution of particles at the mechanochemical treatment of the composite melt. Based on DSC study results, polymers amorphisation in the composites occurred under ultrasonic action. The stress-related characteristics of the materials increased that is explained by improved compatibility and partial copolymerization of the blended polymers.

Phase Composition and Defect Substructure of the Zirconia Nanopowder Modified by the Powerful Ultrasonic Assistance

2013 ◽  
Vol 872 ◽  
pp. 180-183
Author(s):  
Oleg L. Khasanov ◽  
Yury F. Ivanov ◽  
Edgar S. Dvilis ◽  
Oleg S. Tolkachev
Keyword(s):  
Electron Microscopy ◽  
Phase Composition ◽  
Stabilized Zirconia ◽  
Polycrystalline Structure ◽  
Random Orientation ◽  
Ultrasonic Action ◽  
Defect Substructure ◽  
Cubic Phases ◽  
Transmission Electron ◽  
Before And After

Commercial nanopowder of the partially yttrium-stabilized zirconia (ZrO2+3 mol.% Y2O3) was treated by the non-cavitational powerful ultrasonic action (PUA). Influence of PUA on the microstructure and phase composition of the powder has been investigated by scanning and transmission electron microscopy. Investigated powder before and after PUA has polycrystalline structure. It was found that TZ-3YS particles after PU-treatment have tetragonal and cubic zirconia phases; some of the particles consist of a mixture of monoclinic, tetragonal and cubic phases, but these particles have substructure with random orientation of fragments.

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