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Wyszukujesz frazę "Konovalenko, O." wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Chemical evaluation of the quality of nanostructures synthesized on the surface of indium phosphide
Autorzy:
Kovachov, S.S.
Bogdanov, I.T.
Pimenov, D.O.
Bondarenko, V.V.
Konovalenko, A.A.
Skurska, M.M.
Konovalenko, I.S.
Suchikova, Y.O.
Powiązania:
https://bibliotekanauki.pl/articles/2175768.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
semiconductors
nanostructures
chemical criterion
indium phosphide
quality indicators
półprzewodniki
nanostruktury
kryterium chemiczne
fosforek indu
wskaźniki jakości
Opis:
Purpose: The article proposes a methodology for determining the chemical quality criterion of porous layers synthesized on the surface of semiconductors, based on taking into account the chemical parameters of the surface that can affect the properties of nanostructures. Design/methodology/approach: The chemical quality criterion was evaluated in terms of stoichiometry, stability of structures over time, uniformity of distribution over the surface, and the presence of an oxide phase. As an example, a calculation is demonstrated for the por-InP/InP structure synthesized on a mono-InP surface. The results of calculating the chemical quality criterion were evaluated using the Harrington scale to rank samples by quality level. Findings: A chemical criterion for the quality of porous layers synthesized on the surface of semiconductors has been developed. This criterion contains a set of indicators sufficient for a comprehensive assessment of the surface condition and is universal in nature. The studies carried out make it possible to reasonably approach the determination of the modes of electrochemical processing of semiconductors and open up new perspectives in the construction of a model of self-organization of a porous structure. Research limitations/implications: The chemical quality criterion does not allow evaluating the obtained nanostructures in terms of geometric parameters. Therefore, in the future, there is a need to develop a morphological quality criterion and determine a methodology for assessing a generalized quality criterion for nanostructures synthesized on the surface of semiconductors, which may include economic, environmental, technological indicators, and the like. Practical implications: Study results are expedient from a practical point of view, since they make it possible to reasonably approach the determination of the modes of electrochemical processing of semiconductors, synthesize nanostructures with predetermined properties, and create standard samples of nanomaterial composition. Originality/value: Methodology for assessing the quality of porous semiconductors by a chemical criterion has been applied for the first time in engineering science. The article will be useful to engineers, who are engaged in the synthesis of nanostructures, researchers and scientists, as well as specialists in nanometrology.
Źródło:
Archives of Materials Science and Engineering; 2021, 110, 1; 18--26
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of pro-inflammatory cytokines in the genesis of physiological and pathological pregnancy predicting
Autorzy:
Konovalenko, O.
Lapovets, L.
Powiązania:
https://bibliotekanauki.pl/articles/2052220.pdf
Data publikacji:
2014
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
pro-inflammatory citokines
pregnancy
Opis:
Objective: hold concentration determination and study changes in interleukin-1 (IL-1) and interleukin - 6 (IL-6) in pregnant women outside urban areas and in pregnant women living in the city, and to predict the appearance of a possible risk of premature birth. Material study: Were examined 40 pregnant women who make up the group of 23-27 weeks of gestation who were admitted with threatened preterm labor (20 pregnant women living in the countryside, and 20 pregnant women living in the city), as well as a control group - 20 healthy pregnant women with physiological pregnancy. Methods: In all patients and control group was performed determining the content of IL - 1 and IL - 6 in serum by enzyme immunoassay (ELISA) using a test system»Vector-Best» (Russia) on an automatic ELISA analyzer «Triturus». Statistical analysis of data was carried out using the method of variation statistics with using STATISTICA 6 (Statsoft, USA) The results of the study : in determining kontsentratsiyiyi proinflammatory cytokines observed increase in IL - 61 and IL-6 in pregnant women living in countryside and cities in the pregnant compared with the control group of pregnant women with physiological pregnancy (probability differences (p <0,05)). Conclusions: The definition and measurement of proinflammatory cytokines is an opportunity to use the test as early inflammation and mapping the degree of threat of preterm labor. The study of changes in the cytokine brings us to the pathogenic mechanisms of the transition process active infection.
Źródło:
Health Problems of Civilization; 2014, 08, 1; 15-17
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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