1972
DOI: 10.1111/j.1365-2621.1972.tb02726.x
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CHEMISTRY OF THIAMINE DEGRADATION: 4‐Methyl‐5‐(β‐Hydroxyethyl) Thiazole from Thermally Degraded Thiamine

Abstract: A compound isolated from thiamine solutions brought to pH 5.0, 6.0 and 7.0 with IN NaOH or with O.1M phosphate buffer and heated in a boiling water bath open to air or in sealed tubes, or autoclaved at 121°C for 30 min, has been identified as 4‐methyl‐5‐(β‐hydroxyethyl) thiazole. Infrared, NMR and mass spectral data of this compound are presented and discussed.

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Cited by 23 publications
(10 citation statements)
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“…During storage of the samples further increase of lipid oxidation and thiamine losses were recorded. Thiamine losses in the meat samples with highoxidised fats resulted from the thiamine sensibility to oxidation and reduction factors [Dwivedi and Arnold 1972]. Similar results were obtained during pork sterilization [Szymandera-Buszka 2003].…”
Section: Discussionsupporting
confidence: 63%
“…During storage of the samples further increase of lipid oxidation and thiamine losses were recorded. Thiamine losses in the meat samples with highoxidised fats resulted from the thiamine sensibility to oxidation and reduction factors [Dwivedi and Arnold 1972]. Similar results were obtained during pork sterilization [Szymandera-Buszka 2003].…”
Section: Discussionsupporting
confidence: 63%
“…This loss in thiamine was most probably due to it being quite heat labile and easily degraded under these conditions (66,67,(72)(73)(74). This degradation has been reported to produce hydrogen sulphide and other unwanted sulphur compounds (72,(75)(76)(77).…”
Section: Effect Of Wort Boiling (Kettle) On the Thiamine And Riboflavmentioning
confidence: 99%
“…Wyższe wartości współczynników korelacji stwierdzono pomiędzy zawartością tiaminy a wtórnymi produktami utlenienia, co może wskazywać na większą wrażliwość chlorowodorku tiaminy na ich obecność. Straty chlorowodorku tiaminy spowodowane działaniem produktów utlenienia tłuszczów wynikają z dużej wrażliwości tej witaminy na czynniki oksydo-redukcyjne [3,10]. Podobne wnioski uzyskano podczas analizy stabilności tiaminy zawartej w mięsie sterylizowanym z dodatkiem utlenionego smalcu [19].…”
Section: Rodzaj Tłuszczuunclassified
“…Wiadomo jednak, że ich przemiany oksydacyjne przyczyniają się do pogorszenia właściwości sensorycznych tłuszczów oraz obniżenia ich wartości odżywczej i zdrowotnej [1,9,17,20]. Określono związek pomiędzy powstawaniem produktów utlenienia tłuszczów a stratami witamin, w tym tiaminy [2,3,5,18,19]. Wcześniejsze badania dowodzą wpływu produktów utlenienia tłuszczów na zmiany ilościowe tiaminy, głównie w powiązaniu z działaniem wysokiej temperatury.…”
unclassified