Results of these studies demonstrate that the blue crab was readily able to take up and discharge labeled n-alkanes, but it was not able to metabolize them. In contrast, it appears that n-alkanes taken up via the digestive tract in mullet are readily metabolized, probably via microorganisms in the gut. More limited metabolism was observed in mullet when n-alkanes were taken up via the gills.
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http://dx.doi.org/10.1007/BF01685939 | DOI Listing |
Anal Bioanal Chem
September 2024
Faculty of Production Engineering, Chemical Process Engineering, University of Bremen, Leobener Strasse 6, 28359, Bremen, Germany.
In atmospheric pressure chemical ionization mass spectrometry (APCI-MS), [M-3H+HO] ions can deliver analyte-specific signals that enable direct analysis of volatile n-alkane mixtures. The underlying ionization mechanisms have been the subject of open debate, and in particular the role of water is insufficiently clarified to allow for reliable process analytics when the humidity level changes over time. This can be a problem, particularly in online monitoring, where analyte accumulation in the ion source can also occur.
View Article and Find Full Text PDFArch Anim Nutr
April 2023
Department Safety in the Food Chain, German Federal Institute for Risk Assessment, Berlin, Germany.
The use of enrichment and bedding materials in pig husbandry intends to comply with the animals' behavioural needs to perform natural exploratory behaviour, which is strongly connected to foraging behaviour. It can thus be assumed that pigs will ingest a certain material quantity possibly posing a risk to animal health and food safety as previous studies identified contaminants in enrichment and bedding materials. However, risk assessment requires knowledge about the effective amount of ingested material.
View Article and Find Full Text PDFFront Plant Sci
January 2023
Department of Geography, University of Zurich, Zurich, Switzerland.
Leaf cuticular waxes play an important role in reducing evapotranspiration diffusion. However, the ability of mature trees to regulate the biosynthesis of waxes to changing conditions (e.g.
View Article and Find Full Text PDFAnimal
July 2022
Centre for the Research and Technology of Agro-Environmental and Biological Sciences, University of Trás-os-Montes and Alto Douro (UTAD-CITAB)/Inov4Agro (Institute for Innovation, Capacity Building and Sustainability of Agri-Food Production), Vila Real, Portugal. Electronic address:
The assessment of feed intake in stabled horses is a difficult task to accomplish. Faecal markers, namely n-alkanes, have been used successfully for the estimation of this important nutritional parameter. This usually involves the dosing of synthetic n-alkanes via different matrices, a laborious task that may also influence the animal normal foraging behaviour.
View Article and Find Full Text PDFJ Am Soc Mass Spectrom
July 2021
Department of Analytical Chemistry and Water Chemistry, Technical University of Munich, 81377 Munich, Germany.
Soft ionization by a chemical reaction in transfer (SICRIT) is applied to couple gas chromatography (GC) to a high-resolution atmospheric pressure inlet mass spectrometer. These instruments are generally used in combination with liquid chromatography systems (LC-MS). Ionization of alkanes is not possible here with conventional electrospray ionization.
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