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Pyrrolizidine alkaloids in honey: risk analysis by gas chromatography-mass spectrometry.
Recently, contamination of honey with pyrrolizidine alkaloids (PA) has been reported as potential health risk. Therefore, it was of interest to develop a reliable tool for selective and quantitativeExpand
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Polyphenols are intensively metabolized in the human gastrointestinal tract after apple juice consumption.
Polyphenols are secondary plant compounds showing anticarcinogenic effects both in vitro and in animal experiments and may thus reduce the risk of colorectal cancer in man. The identification ofExpand
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Pyrrolizidine alkaloids in pollen and pollen products.
Recently, 1,2-dehydropyrrolizidine alkaloid (PA) ester alkaloids, found predominantly as their N-oxides (PANOs, pyrrolizidine N-oxides), have been reported in both honey and in pollen obtainedExpand
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Pyrrolizidine alkaloids in honey: comparison of analytical methods
Pyrrolizidine alkaloids (PAs) are a structurally diverse group of toxicologically relevant secondary plant metabolites. Currently, two analytical methods are used to determine PA content in honey. ToExpand
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Pyrrolizidine alkaloids (PAs) in honey and pollen-legal regulation of PA levels in food and animal feed required.
Pyrrolizidine alkaloids (PAs) are secondary plant constituents that comprise about 400 different structures and occur in two major forms, a tertiary form and the corresponding N-oxide. PAs containingExpand
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Intestinal transit and systemic metabolism of apple polyphenols
BackgroundApples are the most widely consumed fruits in Germany and various other countries. Positive health effects of apple-derived polyphenols in vivo depend on their absorption, metabolism,Expand
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Pyrrolizidine alkaloids in food: downstream contamination in the food chain caused by honey and pollen
In recent years, there has been a steadily growing number of published data on pyrrolizidine alkaloids (PAs) in honey and pollen. This raises the question whether honey and/or pollen used asExpand
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Pyrrolizidinalkaloide in Honig und Pollen
ZusammenfassungPyrrolizidinalkaloide (PA) sind eine Gruppe sekundärer Pflanzeninhaltsstoffe, die über 370 bekannte Strukturen umfasst und meist in zwei Formen, als tertiäres PA und als dessenExpand
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Occurrence of 2,2,4-trimethyl–1,3-pentanediol monoisobutyrate (Texanol®) in foods packed in polystyrene and polypropylene cups
After simultaneous distillation–extraction (SDE) of foods packed in polystyrene (n = 77) and polypropylene cups (n = 42) from 61 different suppliers, coupled capillary gas chromatography–massExpand
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Degradation processes modelled with Dynamic Bayesian Networks
In this paper a generic degradation model based on Dynamic Bayesian Networks (DBN) which predicts the condition of technical systems is presented. Besides handling bi-directional reasoning, a majorExpand
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