Search Results - "These, Anja"

In vitro biotransformation of pyrrolizidine alkaloids in different species: part II—identification and quantitative assessment of the metabolite profile of six structurally different pyrrolizidine alkaloids by Geburek, Ina, Schrenk, Dieter, These, Anja

“…Pyrrolizidine alkaloids (PA) exert their toxic effects only after bioactivation. Although their toxicity has already been studied and metabolic pathways…”
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Occurrence of pyrrolizidine alkaloids in animal- and plant-derived food: results of a survey across Europe by Mulder, Patrick P.J., López, Patricia, Castelari, Massimo, Bodi, Dorina, Ronczka, Stefan, Preiss-Weigert, Angelika, These, Anja

“…Pyrrolizidine alkaloids (PAs) are secondary metabolites of plant families such as Asteraceae or Boraginaceae and are suspected to be genotoxic carcinogens…”
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Metabolic Pattern of Hepatotoxic Pyrrolizidine Alkaloids in Liver Cells by Geburek, Ina, Rutz, Lukas, Gao, Lan, Küpper, Jan-Heiner, These, Anja, Schrenk, Dieter

“…Contamination with 1,2-unsaturated pyrrolizidine alkaloids (PAs) is a serious problem for certain phytomedicines, foods, and animal feeds. Several of these PAs…”
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Sensitive method for the determination of lipophilic marine biotoxins in extracts of mussels and processed shellfish by high-performance liquid chromatography–tandem mass spectrometry based on enrichment by solid-phase extraction by These, Anja, Scholz, Jana, Preiss-Weigert, Angelika

“…A solid-phase extraction (SPE) method for the enrichment and clean-up of lipophilic marine biotoxins from extracts of different species of bivalve molluscs and…”
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Correction to: Horses' rejection behaviour towards the presence of Senecio jacobaea L. in hay by Sroka, Louisa, Müller, Clara, Hass, Marie-Lena, These, Anja, Aboling, Sabine, Vervuert, Ingrid

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Horses' rejection behaviour towards the presence of Senecio jacobaea L. in hay by Sroka, Louisa, Müller, Clara, Hass, Marie-Lena, These, Anja, Aboling, Sabine, Vervuert, Ingrid

“…Senecio jacobaea contains pyrrolizidine alkaloids that can induce severe hepatic intoxication in horses, either acute when ingested in high amounts or chronic…”
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Results of a European interlaboratory method validation study for the quantitative determination of lipophilic marine biotoxins in raw and cooked shellfish based on high-performance liquid chromatography-tandem mass spectrometry. Part I: collaborative study by These, Anja, Klemm, Christine, Nausch, Ingo, Uhlig, Steffen

“…A European interlaboratory collaborative study was conducted to validate a method for the quantitative determination of lipophilic marine biotoxins based on…”
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Fulvic Acids as Transition State of Organic Matter:  Indications from High Resolution Mass Spectrometry by Reemtsma, Thorsten, These, Anja, Springer, Andreas, Linscheid, Michael

“…Fulvic acids are one of the largest classes of dissolved organic matter, but they are poorly defined and of unclear origin. Three fulvic acid isolates of…”
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Differences in the molecular composition of fulvic acid size fractions detected by size-exclusion chromatography–on line Fourier transform ion cyclotron resonance (FTICR–) mass spectrometry by Reemtsma, Thorsten, These, Anja, Springer, Andreas, Linscheid, Michael

“…Size-exclusion chromatography was coupled to electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (SEC–FTICR–MS) to separate a…”
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Risiken von Pyrrolizidinalkaloiden in Tee und Kräutertee by Benjamin Sachse, Anja These, Matthias Gehling, Stephanie Taube, Christine Sommerfeld, Oliver Lindtner, Bernd Schäfer

“…Pyrrolizidinalkaloide (PA) sind sekundäre Pflanzeninhaltsstoffe, die von einer Vielzahl von Pflanzen gebildet werden und u. a. zur Abwehr von Fraßfeinden…”
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Rumen Metabolism of Senecio Pyrrolizidine Alkaloids May Explain Why Cattle Tolerate Higher Doses Than Monogastric Species by Taenzer, Julian, Gehling, Matthias, Klevenhusen, Fenja, Saltzmann, Janine, Dänicke, Sven, These, Anja

“…Rumen metabolism of Senecio pyrrolizidine alkaloids (PAs) and their N-oxide forms was studied by mass spectrometry in in vitro batch culture incubates and…”
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In vitro metabolism of pyrrolizidine alkaloids – Metabolic degradation and GSH conjugate formation of different structure types by Geburek, Ina, Preiss-Weigert, Angelika, Lahrssen-Wiederholt, Monika, Schrenk, Dieter, These, Anja

“…Pyrrolizidine alkaloid (PA) forming plants are found worldwide and may contaminate food products at levels being of concern for human health. Due to the high…”
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Cannabinoid contents in hemp teas and estimation of their transfer into tea infusions by Triesch, Nadja, Vijayakumar, Nansiya, Weigel, Stefan, These, Anja

“…This study focused on the investigation of cannabinoid profiles and contents of 23 different hemp teas and on the individual transfer of 16 cannabinoids from…”
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Human CYP3A4-mediated toxification of the pyrrolizidine alkaloid lasiocarpine by Ebmeyer, Johanna, Braeuning, Albert, Glatt, Hansruedi, These, Anja, Hessel-Pras, Stefanie, Lampen, Alfonso

“…Pyrrolizidine alkaloids (PA) are widely distributed phytotoxins contaminating food and feed. Hepatic enzymes are considered to bioactivate PA. Previous studies…”
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Pyrrolizidine alkaloid profiling of four Boraginaceae species from Northern Germany and implications for the analytical scope proposed for monitoring of maximum levels by Mädge, Inga, Gehling, Matthias, Schöne, Cindy, Winterhalter, Peter, These, Anja

“…Pyrrolizidine alkaloids (PAs) and their corresponding N-oxides (PANOs) have been determined in food and feed at levels relevant for consumer health. More than…”
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Genetic and chemical diversity of the toxic herb Jacobaea vulgaris Gaertn. (syn. Senecio jacobaea L.) in Northern Germany by Jung, Stefanie, Lauter, Jan, Hartung, Nicole M., These, Anja, Hamscher, Gerd, Wissemann, Volker

“…Tansy ragwort, Jacobaea vulgaris Gaertn. (syn. Senecio jacobaea L.), is a common Asteraceae in Europe and Asia and known to be an invasive pest in several…”
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Determination of pyrrolizidine alkaloids in tea, herbal drugs and honey by Bodi, Dorina, Ronczka, Stefan, Gottschalk, Christoph, Behr, Nastassja, Skibba, Anne, Wagner, Matthias, Lahrssen-Wiederholt, Monika, Preiss-Weigert, Angelika, These, Anja

“…Honey was previously considered to be one of the main food sources of human pyrrolizidine alkaloid (PA) exposure in Europe. However, comprehensive analyses of…”
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Selective and low transfer of pyrrolizidine alkaloids from Jacobaea vulgaris Gaertn. into muscle and liver of dairy cattle, goat and sheep by Taenzer, Julian, These, Anja, Knappstein, Karin, Lamp, Julika, Dänicke, Sven, Saltzmann, Janine, Gottschalk, Christoph, Fedotenko, Illya, Jira, Wolfgang

“…1,2-unsaturated pyrrolizidine alkaloids and their N-oxides (PA/PANO) are plant toxins that are produced by several hundreds of plant species. Due to the…”
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Pyrrolizidine alkaloids in food and phytomedicine: Occurrence, exposure, toxicity, mechanisms, and risk assessment - A review by Schrenk, Dieter, Gao, Lan, Lin, Ge, Mahony, Catherine, Mulder, Patrick P.J., Peijnenburg, Ad, Pfuhler, Stefan, Rietjens, Ivonne M.C.M., Rutz, Lukas, Steinhoff, Barbara, These, Anja

“…Among naturally occurring plant constituents, the 1,2-unsaturated pyrrolizidine alkaloids (in the following termed ‘PAs’) play a distinct role because of the…”
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Structural screening by multiple reaction monitoring as a new approach for tandem mass spectrometry: presented for the determination of pyrrolizidine alkaloids in plants by These, Anja, Bodi, Dorina, Ronczka, Stefan, Lahrssen-Wiederholt, Monika, Preiss-Weigert, Angelika

“…In tandem mass spectrometry the multiple reaction monitoring (MRM) mode is normally used for targeted analysis but this mode also has the potential to screen…”
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