Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Jan, Teipel"'
Publikováno v:
Foods, Vol 13, Iss 5, p 720 (2024)
Isoeugenol (2-methoxy-4-(1-propenyl)phenol) has been recently classified as possibly carcinogenic to humans (Group 2B) by the International Agency for Research on Cancer (IARC). This study conducted an analysis of isoeugenol in common herbs and spice
Externí odkaz:
https://doaj.org/article/cb3699c835114569873a6f7e02816fd3
Autor:
Jan Teipel, Vera Gottstein, Eva Hölzle, Katja Kaltenbach, Dirk W. Lachenmeier, Thomas Kuballa
Publikováno v:
Chemistry, Vol 4, Iss 3, Pp 776-785 (2022)
Highly reactive decomposition products of deuterated chloroform can deteriorate samples dissolved in this commonly used solvent for nuclear magnetic resonance (NMR) spectroscopy. Samples for metabolomics studies often contain a complex mixture of sen
Externí odkaz:
https://doaj.org/article/9197fc03d68b4b30ad34b0693a2c906e
Publikováno v:
Separations, Vol 10, Iss 11, p 572 (2023)
As early as 1946, Felix Bloch and Edward Mills Purcell detected nuclear magnetic resonance signals, earning themselves the Nobel Prize in 1952. The same year saw the launch of the first commercial nuclear magnetic resonance (NMR) spectrometer. Since
Externí odkaz:
https://doaj.org/article/dbd9943de17f4015a21bab3c99697b7a
Autor:
Jan Teipel
Publikováno v:
Proceedings, Vol 89, Iss 1, p 28 (2023)
Food authenticity is becoming increasingly important to consumers, producers, and retailers. Furthermore, more and more food properties considered to be value-relevant are advertised. Food fraud, which is the intentional misrepresentation of a food
Externí odkaz:
https://doaj.org/article/0acd53be08874b879e426654e7c20f09
Autor:
Henri Lösel, Johannes Brockelt, Florian Gärber, Jan Teipel, Thomas Kuballa, Stephan Seifert, Markus Fischer
Publikováno v:
Metabolites, Vol 13, Iss 8, p 882 (2023)
The importance of animal welfare and the organic production of chicken eggs has increased in the European Union in recent years. Legal regulation for organic husbandry makes the production of organic chicken eggs more expensive compared to convention
Externí odkaz:
https://doaj.org/article/0f7f7c8702344e5ebcf0dcd776426ad1
Publikováno v:
Molecules, Vol 26, Iss 15, p 4656 (2021)
Phenolic structures are of great interest due to their antioxidant properties and various postulated benefits on human health. However, the quantification of these structures in fruits and vegetables, as well as in vivo or in vitro experiments, is de
Externí odkaz:
https://doaj.org/article/c5f44c0ad9b84ab29ceb5767bd50cae5
Autor:
Marwa Scharinger, Marcel Kuntz, Andreas Scharinger, Jan Teipel, Thomas Kuballa, Stephan G. Walch, Dirk W. Lachenmeier
Publikováno v:
Foods, Vol 10, Iss 3, p 526 (2021)
The food additive sorbic acid is considered as an effective preservative for certain cereal products, and propionic acid is commonly added in bakery wares, e.g., bread and fine bakery wares. The aim of this study was to develop and validate a new nuc
Externí odkaz:
https://doaj.org/article/bc0bcb12b48e41c3ae57d1e7ce180522
Autor:
Alex O. Okaru, Andreas Scharinger, Tabata Rajcic de Rezende, Jan Teipel, Thomas Kuballa, Stephan G. Walch, Dirk W. Lachenmeier
Publikováno v:
Foods, Vol 9, Iss 1, p 47 (2020)
Monitoring coffee quality as a means of detecting and preventing economically motivated fraud is an important aspect of international commerce today. Therefore, there is a compelling need for rapid high throughput validated analytical techniques such
Externí odkaz:
https://doaj.org/article/98a8fd25d78e48189a349d05681dcbc4
Autor:
Jan Teipel, Vera Gottstein, Eva Hölzle, Katja Kaltenbach, Dirk W. Lachenmeier, Thomas Kuballa
Highly reactive decomposition products of (deuterated) chloroform can deteriorate samples dissolved in this commonly used NMR solvent. For sensitive samples (such as peptides, unsaturated fatty acids, vitamins), this can lead to abnormal NMR spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a960072a5ceab92834aa58eab8ecc90
https://doi.org/10.20944/preprints202207.0055.v1
https://doi.org/10.20944/preprints202207.0055.v1
Autor:
Dirk W. Lachenmeier, Steffen Schwarz, Jan Teipel, Maren Hegmanns, Thomas Kuballa, Stephan G. Walch, Carmen M. Breitling-Utzmann
Publikováno v:
Toxics, Vol 7, Iss 1, p 1 (2018)
The four heat-induced coffee contaminants—acrylamide, furfuryl alcohol (FA), furan and 5-hydroxymethylfurfural (HMF)—were analyzed in a collective of commercial samples as well as in Coffea arabica seeds roasted under controlled conditions from v
Externí odkaz:
https://doaj.org/article/8cdf7e2c3a3f484a9eb66887ea6df084