1,721,172 research outputs found
Traceability of pasture milk using alkaloid profile
No full textAlkaloids are basic nitrogen-containing organic compounds widespread in nature. The study evaluated the possibility to use them for trace pasture mil
Mepiquat natural formation in cocoa commercial products
No full textMepiquat (MQ) is well-known products commonly used in agriculture as inhibitor of gibberellin biosynthesis. Several studies reported the natural formation of MQ in food heated under dry conditions. In this study cocoa products were analysed with IC-HQOMS to evaluate the presence of MQ
New methods for quat pesticides analysis using cationic chromatography coupled with High Resolution Mass Spectrometry
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Suspect screening of glycoalkaloids in plant extracts using neutral loss: high resolution mass spectrometry
No full textAlkaloids represent a very large and chemically inhomogeneous group of nitrogen compounds isolated from different natural sources. They have long been studied due to their specific toxicological characteristics, as some of them are suspected of having very dangerous properties, but there has still been little investigation of the existence of possible glycoside precursors in plant products. An analytical method based on a suspect screening approach using liquid chromatography coupled with high resolution tandem mass spectrometry in neutral loss (NL) mode was used for the tentative identification of alkaloid precursors. This NL approach applied to 15 plant extracts made it possible to tentatively identify 41 glycosidic precursors (4 monopentosides, 3 monodeoxyhexosides, 24 monohexosides, 1 pentoside-hexoside and 9 dihexosides) in 6 of them, belonging to the piperidine (21), pyrrolizidine (9), isoquinoline (7), indole (3) and tropane (1) alkaloid groups. This work confirms the promising investigative ability of a suspect screening approach in this complex field of stud
APCI and HESI source evaluation to investigate nitrosamine formation in meat
No full textMeat is a very complex matrix and the legal limits for some nitrosamines are extremely low (2 ug/kg). A method with adequate cleaning of the matrix and maximum sensitivity in ionization was then evaluated using an APCI – HESI source couple with a HQOM
Gum arabic characterisation and its detection in wine using High Resolution Mass Spectrometry
No full textL’efficacia dei chitosani varia con le specie microbiche
Full text linkI meccanismi dell’azione antimicrobica dei chitosani sono noti, ma come interagiscono con la microflora enologica? Test della FEM hanno rilevato che S. bayanus e T. delbruekii sono risultati incapaci
di completare il consumo di zucchero in presenza di chitosan
Evidence of the correlation between the oxygen radical absorbance capacity (ORAC) and the potential development of atypical aging (ATA) in white wines
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