Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Radovan Metelka"'
Autor:
Oleksandr Matvieiev, Renáta Šelešovská, Marián Marton, Michal Hatala, Radovan Metelka, Martin Weis, Marian Vojs
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-12 (2023)
Abstract Screen-printed sensors with chemically deposited boron-doped diamond electrodes (BDDE) were modified with different types of gold nanoparticles (AuNPs) according to a new original procedure. Physically and electrochemically deposited AuNPs h
Externí odkaz:
https://doaj.org/article/200702022d004ccaa07b2b4657ce4970
Autor:
Iveta Brožková, Libor Červenka, Petra Moťková, Michaela Frühbauerová, Radovan Metelka, Ivan Švancara, Milan Sýs
Publikováno v:
Applied Sciences, Vol 12, Iss 13, p 6320 (2022)
This review deals with microbial adhesion to metal-based surfaces and the subsequent biofilm formation, showing that both processes are a serious problem in the food industry, where pathogenic microorganisms released from the biofilm structure may po
Externí odkaz:
https://doaj.org/article/16f7236708f64f91bc980207b3be6de7
Autor:
Radovan Metelka, Pavlína Vlasáková, Sylwia Smarzewska, Dariusz Guziejewski, Milan Vlček, Milan Sýs
Publikováno v:
Sensors, Vol 22, Iss 9, p 3466 (2022)
A porous layer of copper was formed on the surface of screen-printed carbon electrodes via the colloidal crystal templating technique. An aqueous suspension of monodisperse polystyrene spheres of 500 nm particle diameter was drop-casted on the carbon
Externí odkaz:
https://doaj.org/article/31e85f693f69494c9501a45f0056404c
Autor:
Ewelina Skowron, Kaja Spilarewicz-Stanek, Dariusz Guziejewski, Kamila Koszelska, Radovan Metelka, Sylwia Smarzewska
Publikováno v:
Molecules, Vol 27, Iss 7, p 2037 (2022)
The analytical performance of the clay paste electrode and graphene paste electrode was compared using square wave voltammetry (SWV) and cyclic voltammetry (CV). The comparison was made on the basis of a paracetamol (PA) determination on both working
Externí odkaz:
https://doaj.org/article/678414becd344d7998bf9c9c2b215e5b
Electrochemical Behaviour of Tocopherols: Possibilities of Their Simultaneous Voltammetric Detection
Autor:
Granit Jashari, Gylxhane Kastrati, Lucie Korecká, Radovan Metelka, Milan Sýs, Amir M. Ashrafi
Publikováno v:
Applied Sciences, Vol 11, Iss 17, p 8095 (2021)
An electroanalytical study for possible simultaneous detection of three naturally occurring isomers of vitamin E (α, γ, and δ-tocopherol) was performed. This research includes several optimization steps, such as selection of electrode material, co
Externí odkaz:
https://doaj.org/article/2a975d590c9e48fea62d0bcfc56aa571
Autor:
Gylxhane Kastrati, Granit Jashari, Milan Sýs, Blanka Švecová, Tahir Arbneshi, Radovan Metelka, Zuzana Bílková, Lucie Korecká
Publikováno v:
Applied Sciences, Vol 10, Iss 14, p 4759 (2020)
A new voltammetric method for the simultaneous determination of vitamin E and vitamin K present in different types of commercially available food supplements has been developed. This electroanalytical method is based on the ex situ adsorptive accumul
Externí odkaz:
https://doaj.org/article/538d8337ed094da98424db6b6f0b625d
Autor:
Arbër Frangu, Amir M. Ashrafi, Milan Sýs, Tahir Arbneshi, Radovan Metelka, Vojtěch Adam, Milan Vlček, Lukáš Richtera
Publikováno v:
Applied Sciences, Vol 10, Iss 7, p 2497 (2020)
In this contribution, Trolox equivalent antioxidant capacity (TEAC) was determined in various berries using carbon paste tyrosinase biosensor with multi-walled carbon nanotubes (MWCNTs), coated with Nafion® layer. Electrochemical behaviour of the bi
Externí odkaz:
https://doaj.org/article/85c49277098a42518642bc6a6eea97fa
Publikováno v:
Journal of the Serbian Chemical Society, Vol 74, Iss 10, Pp 1021-1033 (2009)
An overview is given dealing with the applications of carbon paste electrodes in equilibrium potentiometry as well as in electrochemical stripping analysis using both voltammetric and potentiometric modes. Various modifications of carbon pastes and c
Externí odkaz:
https://doaj.org/article/16e8d39ab2c94ee59de13a6c8a04f41e
Publikováno v:
Chemosensors, Vol 5, Iss 1, p 9 (2017)
The aim of this electrochemical study was to ascertain which position of hydroxy groups on a benzene ring provides electroactive products after enzymatic oxidation by laccase originating from the Trametes versicolor mushroom, exhibiting intense redox
Externí odkaz:
https://doaj.org/article/95c017785f834860bde3152a4872177b
Publikováno v:
Czech Journal of Food Sciences, Vol 29, Iss Special Issue, Pp S109-S114 (2011)
Selected springs in the Pardubice Region were repeatedly examined for analytical and microbiological indicators. Microbiological analyses included the determination of intestinal enterococci, coliform bacteria, E. coli, and the number of colonies cul
Externí odkaz:
https://doaj.org/article/be16107a74df47ccbc86e8519a3cd9f2