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Wyszukujesz frazę "neobetanin" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Profiles of products generated during betacyanins reduction by 2-methylpyridine borane
Autorzy:
Szot, D.
Starzak, K.
Skopińska, A.
Wybraniec, S.
Powiązania:
https://bibliotekanauki.pl/articles/115550.pdf
Data publikacji:
2015
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
betanina
neobetanina
betacyjaniny
redukcja
2-2-metylopirydyna boranu
LC-MS
betanin
neobetanin
betacyanins
reduction
2-methylpyridine borane
Opis:
Betanin and neobetanin (14,15-dehydrogenated betanin), natural betacyanin pigments were subjected to a gentle reduction by 2-methylpyridine borane. During each reduction reaction, the visible spectra were collected. The results were tentatively confirmed by LC-DAD-ESI-MS. In comparison to a previous study with sodium borohydride, various types of products were obtained. Depending on pH, one or two double bonds are reduced. Interestingly, a preliminary decarboxylation of the pigments is also noticed. Betacyanins are plant red-violet pigments applied as colorants in food and pharmaceutical industry which are proven to have an antioxidant activity. They are confirmed to be beneficial for human health as free radical scavengers. Therefore, betacyanins can prevent from many diseases which would be induced by an excessive accumulation of free radicals in the human body. There are more and more reports of their pro-health properties. However, the mechanism of betacyanins oxidation remains not completely elucidated. It is postulated that the rearrangement in the chromophoric system is a significant part of this mechanism. The products obtained as a result of reduction of betanin and neobetanin can be useful in oxidation investigations. Betacyanins with partially destroyed chromophoric system by reduction of the double bonds would by perfect models for further studies on their oxidation.
Źródło:
Challenges of Modern Technology; 2015, 6, 4; 19-22
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enzymatic oxidation of neobetanin monitored by liquid chromatography with mass spectrometric detection
Autorzy:
Starzak, K.
Szot, D.
Skopińska, A.
Swiergosz, T.
Wybraniec, S.
Powiązania:
https://bibliotekanauki.pl/articles/115945.pdf
Data publikacji:
2016
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
neobetanin
betalains
betacyanins
horseradish peroxidase
oxidation
enzymatic
spectrophotometry
mass spectrometry
chromatography
neobetanina
betalainy
betacyjaniny
peroksydaza chrzanowa
enzymatyczne utlenianie
spektrofotometria
spektrometria masowa
chromatografia
Opis:
The aim of this study was monitoring of enzymatic oxidation of neobetanin, an interesting type of betalains which is a partially oxidized betacyanin. As it belongs to betalains, it is water soluble and non-toxic, but a presence of a few functional groups makes it very reactive. Oxidation reactions were performed using horseradish peroxidase followed by spectrophotometric and mass spectrometric detection (LC-DAD-ESI-MS/MS) of obtained products. Enzymatic oxidation of neobetanin leads to a formation of new decarboxy- and dehydro-derivatives. The main identified oxidation product is 2-decarboxy-2,3-dehydroneobetanin. Searching for all formed oxidation products is extremely important for elucidation of the betalains oxidation mechanism.
Źródło:
Challenges of Modern Technology; 2016, 7, 1; 29-31
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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