Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Josef Zehnálek"'
Autor:
Vojtech Adam, Boris Krska, Miroslava Beklova, Josef Zehnalek, Otakar Rop, Sylvie Skalickova, Pavlina Sobrova, Jiri Sochor, Rene Kizek, Ondrej Zitka
Publikováno v:
Molecules, Vol 16, Iss 4, Pp 2914-2936 (2011)
Phenols are broadly distributed in the plant kingdom and are the most abundant secondary metabolites of plants. Plant polyphenols have drawn increasing attention due to their potential antioxidant properties and their marked effects in the prevention
Externí odkaz:
https://doaj.org/article/ff440130649845eea3e20ab048f8c354
Autor:
Marketa Ryvolova, Olga Krystofova, Petr Salas, Jaromir Hubalek, Vojtech Adam, Libuse Trnkova, Ladislav Havel, Miroslava Beklova, Josef Zehnalek, Ivo Provaznik, Rene Kizek, Jiri Sochor
Publikováno v:
Molecules, Vol 15, Iss 12, Pp 8618-8640 (2010)
The aim of this study was to describe behaviour, kinetics, time courses and limitations of the six different fully automated spectrometric methods - DPPH, TEAC, FRAP, DMPD, Free Radicals and Blue CrO5. Absorption curves were measured and absorbance m
Externí odkaz:
https://doaj.org/article/52f7344d1d4c4169b691bbd551b9ce8b
Autor:
Olga Krystofova, Libuse Trnkova, Vojtech Adam, Josef Zehnalek, Jaromir Hubalek, Petr Babula, Rene Kizek
Publikováno v:
Sensors, Vol 10, Iss 6, Pp 5308-5328 (2010)
Routine determination of trace metals in complex media is still a difficult task for many analytical instruments. The aim of this work was to compare three electro-chemical instruments [a standard potentiostat (Autolab), a commercially available mini
Externí odkaz:
https://doaj.org/article/92e2298dce9d4723ae0a3f67366e959e
Autor:
Radka Opatrilova, Vojtech Adam, Petr Babula, Josef Zehnalek, Jozef Kaiser, Karel Novotny, Michaela Galiova, Violetta Shestivska, Olga Krystofova, Rene Kizek
Publikováno v:
Sensors, Vol 9, Iss 7, Pp 5040-5058 (2009)
In this study, the influence of lead (II) ions on sunflower growth and biochemistry was investigated from various points of view. Sunflower plants were treated with 0, 10, 50, 100 and/or 500 µM Pb-EDTA for eight days. We observed alterations in grow
Externí odkaz:
https://doaj.org/article/aa255247ef21463a94c6bfe1fab8e68d
Autor:
Ondrej Zitka, Vojtech Adam, Jitka Petrlova, Josef Zehnalek, Ales Horna, Rene Kizek, Vojtech Reznicek, Miroslava Beklova, Zbynek Gazdik
Publikováno v:
Sensors, Vol 8, Iss 11, Pp 7097-7112 (2008)
Vitamin C (ascorbic acid, ascorbate, AA) is a water soluble organic compound that participates in many biological processes. The main aim of this paper was to utilize two electrochemical detectors (amperometric – Coulouchem III and coulo
Externí odkaz:
https://doaj.org/article/ed1e855777544588891a976ca0d0aaba
Autor:
Rene Kizek, Petr Babula, Ladislav Zeman, Vojtech Adam, Vaclav Diopan, Josef Zehnalek, Ladislav Havel, Miroslava Beklova, Sona Krizkova, Dalibor Huska
Publikováno v:
Sensors, Vol 8, Iss 2, Pp 1039-1047 (2008)
Metallothioneins belong to a group of intracellular, high molecular andcysteine-rich proteins whose content in an organism increase with increasing concentrationof a heavy metal. The aim of this work was to apply the electrochemical analysis for thea
Externí odkaz:
https://doaj.org/article/35b85d74bc224f31bf5f59f12fc60011
Autor:
Rene Kizek, Josef Zehnalek, Martin Adamek, Katerina Klosova, Ales Horna, Libuse Trnkova, Michal Masarik, Dalibor Huska, Olga Krystofova, Vojtech Adam, Jan Hradecky, Jaromir Hubalek
Publikováno v:
Sensors, Vol 7, Iss 7, Pp 1238-1255 (2007)
Urease is the enzyme catalyzing the hydrolysis of urea into carbon dioxide andammonia. This enzyme is substrate-specific, which means that the enzyme catalyzes thehydrolysis of urea only. This feature is a basic diagnostic criterion used in thedeterm
Externí odkaz:
https://doaj.org/article/6030428551894024b86fe62a179cb7f8
Autor:
Rene Kizek, Miroslava Beklova, Libuse Trnkova, Vojtech Adam, Josef Zehnalek, Ladislav Havel, Jiri Pikula, Jiri Baloun, Karel Stejskal, Ondrej Zitka, Pavel Hanustiak, Vaclav Diopan, Dalibor Huska, Veronika Supalkova
Publikováno v:
Sensors, Vol 7, Iss 6, Pp 932-959 (2007)
Due to unique physico-chemical properties of –SH moiety thiols comprise widegroup of biologically important compounds. A review devoted to biological functions ofglutathione and phytochelatins with literature survey of methods used to an
Externí odkaz:
https://doaj.org/article/437faf37d9af48d39cd99cdee8d74a79
Autor:
Rene Kizek, Jan Vitecek, Frantisek Jelen, Libuse Trnkova, Bernd Sures, David Potesil, Jitka Petrlova, Josef Zehnalek, Vojtech Adam Adam
Publikováno v:
Sensors, Vol 5, Iss 1, Pp 70-84 (2005)
Electrochemical biosensors have superior properties over other existingmeasurement systems because they can provide rapid, simple and low-cost on-fielddetermination of many biological active species and a number of dangerous pollutants. Inour work, w
Externí odkaz:
https://doaj.org/article/789648c0a87143e3bb8d9815d21b4738
Publikováno v:
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, Vol 54, Iss 1, Pp 145-154 (2006)
In model experiment, an influence of increasing KCl doses on spring barley growth, accumulation of main mineral nutrients (N, P, K, Ca, Mg and Na) in main stalks, offshoots and roots and on yield formation and its structure was observed. Increase of
Externí odkaz:
https://doaj.org/article/bde60bedfd6343acb5fcc248beedc367