Wszystkie pola: Yushchishina, Anna - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Research of Aggregatic Stability and Bactericidal Activities of Nanosilver Colloidal Solutions
Autorzy:: Yushchishina, Anna
Pasichnyk, Maria
Mitryasova, Olena
Koszelnik, Piotr
Gruca-Rokosz, Renata
Kida, Małgorzata
Powiązania:: https://bibliotekanauki.pl/articles/1811619.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: colloidal solution
nanosilver
surface-active substances
SAS
aggregate resistance
bactericidal action
Opis:: The influence of SAS of different chemical nature on aggregate stability and bactericidal action of nano silver colloidal solutions is investigated. Colloidal solutions of silver were obtained by restoring the argentum nitrate agent in a neutral medium. With the help of spectrophotometric method, it has been proved that such solutions are characterized by high aggregate stability compared with the use of other traditional reducing agents. Anionic SAS (sodium dodecylsulfate and sulfanol) and nonionic SAS (OS-20) increase aggregate stability of nano silver solutions, while cationogenic SAS − alcamone promotes rapid coagulation and aggregation of nano silver particles. The study of bactericidal action of the solutions to the E.coli are showed that the nano silve colloidal solution with or without presence of OS-20 and alcamone completely inhibit the growth of colonies of E.coli, that is, it’s have high bactericidal properties.
Źródło:: Rocznik Ochrona Środowiska; 2020, Tom 22, cz. 1; 40-50
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Green Approach to Intensify the Extraction Processes of Substances from Plant Materials
Autorzy:: Malyushevskaya, Antonina
Koszelnik, Piotr
Yushchishina, Anna
Mitryasova, Olena
Gruca-Rokosz, Renata
Powiązania:: https://bibliotekanauki.pl/articles/2173315.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: green approach
plant material
extraction
polysaccharides
pulsed electric field
Opis:: The principles of sustainable development and green chemistry are priorities in the development of new technologies for the extraction of useful biologically active substances, for example, in the manufacture of medicines. The processes of extracting substances from plant raw materials have many applications. Intensification of such processes, reducing their duration, energy consumption and consumption of the extractant is urgent. The object of the reseach is the green approach to intensify the extraction processes of polysaccharide substances from plant materials. The research methodology was experimental with statistical data processing. In the field of experimental research was the process of the influence of pulsed, alternating and direct current on the intensity of aqueous extraction of polysaccharides from plant materials. The high efficiency of intensification of extraction by a pulsed electric field was studied. The process can reduce the time for obtaining water-soluble polysaccharides by 3 times in comparison with traditional pharmacopoeial convection methods and reduce energy consumption by 20 times. The significance of the pulse current parameters for effective extraction was determined: the referred pulse shape, the frequency of the pulse current for extracting the maximum amount of water-soluble polysaccharides, the pulse duration, and the optimal processing time. The green approach to the use of a moderate electric field of pulsed current to accelerate the extraction of biologically active substances is the basis of the method of intensification of other traditional mass transfer processes for the sustainable development of technology.
Źródło:: Journal of Ecological Engineering; 2022, 23, 7; 197--204
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Eco-Friendly Principles on the Extraction of Humic Acids Intensification from Biosubstrates
Autorzy:: Malyushevskaya, Antonina
Koszelnik, Piotr
Yushchishina, Anna
Mitryasova, Olena
Mats, Andrii
Gruca-Rokosz, Renata
Powiązania:: https://bibliotekanauki.pl/articles/2202369.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: eco-friendly technology
environmental security
extraction
electric discharge
humic acid
biosubstrate
peat
Opis:: It is necessary to find innovative ways to improve the environmental performance of production processes and products. The technology of extracting valuable components from raw materials of plant origin is often used in technological processes of the food, pharmaceutical, chemical and other industries. Extraction is the most energy intensive step. The factors contributing to the extraction of humic acids from plant substrates under the action of electric discharge were studied. The purpose of the work was to study the efficiency of humic acids extraction from the biosubstrate under the action of electric discharges. The physical experiment showed that the main factor influencing the intensity of extraction is the degree of grinding of the solid phase of the biosubstrate-water suspension. The efficiency of electric discharge grinding depends on the pressure amplitude at the distance of the inner radius of the chamber and the number of discharge pulses. It was established that the number of chemical reagents (alkalis), usually used in the process of extracting humic acids from peat, can be reduced many times due to the appearance of radicals and peroxide compounds in the peat-water suspension resulting from the action of an electric discharge. The prospects of the non-thermal electric discharge method of intensification of the extraction of humic acids from biosubstrates were determined.
Źródło:: Journal of Ecological Engineering; 2023, 24, 2; 317--327
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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