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355 results on '"Baldermann, Susanne"'

13. Uptake and translocation of nanoplastics in mono and dicot vegetables.

Author

Zytowski, Eric, Mollavali, Mohanna, and Baldermann, Susanne

Abstract

The excessive production and use of plastics increase the release of micro‐ and nanoplastics (MNPs) into the environment. In recent years, research has focused on the occurrence of MNPs in air, soil and water. Nevertheless, there is still a lack of knowledge regarding MNPs in plants. To determine the load, translocation of MNPs and their effects on metabolism, pak choi, tomato, radish and asparagus have been exposed with fluorescent‐labelled poly(methyl methacrylate) or polystyrene (PS) MNPs. The entry of nanoparticles (NPs) of various sizes (100–500 nm) and surface modifications (unmodified, COOH or NH2) into plants has been demonstrated using confocal laser scanning microscopy (CLSM). The translocalization from root to shoot and the accumulation of NP in the intercellular spaces were regardless of the surface modification. In addition, metabolomics was used to evaluate metabolic changes induced by MNPs in pak choi. Changes in phenolic compounds, phytohormone derivatives and other classes of compounds known to be triggered by various environmental stresses have been identified. The present study demonstrates the uptake and translocalization of MNPs in edible parts of vegetables and may pose a hazard for humans. Summary statement: The uptake of poly(methyl methacrylate) and polystyrene micro‐ and nanoplastic particles, independent of surface modification, through the root and leaf surface and subsequent transport to the edible parts of vegetables (pak choi, tomato, radish and asparagus) was demonstrated using confocal laser scanning microscopy. Furthermore, a metabolomics study enabled the identification of abiotic stress markers in pak choi. [ABSTRACT FROM AUTHOR]

Published
2025
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22. Urinary Excretion of Mercapturic Acids of the Rodent Carcinogen Methyleugenol after a Single Meal of Basil Pesto: A Controlled Exposure Study in Humans

Author

Nieschalke, Kai, primary, Bergau, Nick, additional, Jessel, Sönke, additional, Seidel, Albrecht, additional, Baldermann, Susanne, additional, Schreiner, Monika, additional, Abraham, Klaus, additional, Lampen, Alfonso, additional, Monien, Bernhard H., additional, Kleuser, Burkhard, additional, Glatt, Hansruedi, additional, and Schumacher, Fabian, additional

Published
2023
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30. Postprandial Micronutrient Variability and Bioavailability: An Interventional Meal Study in Young vs. Old Participants.

Author

Pellowski, Denny, Kusch, Paula, Henning, Thorsten, Kochlik, Bastian, Maares, Maria, Schmiedeskamp, Amy, Pohl, Gabriele, Schreiner, Monika, Baldermann, Susanne, Haase, Hajo, Schwerdtle, Tanja, Grune, Tilman, and Weber, Daniela

Abstract

This study explores age- and time-dependent variations in postprandial micronutrient absorption after a micronutrient-rich intervention meal within the Biomiel (bioavailability of micronutrients in elderly) study. Comprising 43 healthy participants, the study compares young (n = 21; mean age 26.90 years) and old (n = 22; mean age 66.77 years) men and women, analyzing baseline concentrations and six-hour postprandial dynamics of iron (Fe), copper (Cu), zinc (Zn), selenium (Se), iodine (I), free zinc (fZn), vitamin C, retinol, lycopene, β-carotene, α-tocopherol, and γ-tocopherol, along with 25(OH) vitamin D (quantified only at baseline). Methodologically, quantifications in serum or plasma were performed at baseline and also at 90, 180, 270, and 360 min postprandially. Results reveal higher baseline serum Zn and plasma lycopene concentrations in the young group, whereas Cu, Se, Cu/Zn ratio, 25(OH) vitamin D, α-tocopherol, and γ-tocopherol were higher in old participants. Postprandial variability of Zn, vitamin C, and lycopene showed a strong time-dependency. Age-related differences in postprandial metabolism were observed for Se, Cu, and I. Nevertheless, most of the variance was explained by individuality. Despite some limitations, this study provides insights into postprandial micronutrient metabolism (in serum/plasma), emphasizing the need for further research for a comprehensive understanding of this complex field. Our discoveries offer valuable insights for designing targeted interventions to address and mitigate micronutrient deficiencies in older adults, fostering optimal health and well-being across the lifespan. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Antifogging additives for greenhouse covers - effects on phytochemicals and nutritional quality of lettuce

Author

Harbart, Vanessa, Kläring, Hans-Peter, and Baldermann, Susanne

Abstract

Antifogging additives are commercially used in greenhouse films to prevent water droplet formation on these films. This can increase light transmission, and thus, improve crop yield. However, the effect of polytunnels with antifogging additives on phytochemical content in lettuce (Lactuca sativa var. capitata ) is currently unclear. Here, polytunnels were chosen as a model to investigate the impact of antifogging additives in a completely randomized setting. Analysis by means of chromatographic methods coupled with mass spectrometry revealed a general influence of polytunnel cultivation compared to lettuces grown without a polytunnel on the content of phenolic compounds, photosynthetic pigments and fatty acids. The use of antifogging additives does not lead to significant differences in phenolic compounds and fatty acids. However, significant differences were observed for carotenoids and chlorophylls by both polytunnel cultivation and the use of antifogging additives. These differences probably occurred predominantly due to differences in light and temperature regimes related to polytunnel cultivation. Thus, due to polytunnels in general and the use of antifogging additives in particular, environmental conditions are created that impact valuable compounds and alter nutritional quality of crops., Journal of Applied Botany and Food Quality, Vol. 95 (2022): Journal of Applied Botany and Food Quality

Published
2022
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43. Influence of dietary proteins on relevant aspects of carotenoid bioavailability

Author

UCL - SST/LIBST - Louvain Institute of Biomolecular Science and Technology, UCL - Faculté des Sciences, Bohn, Torsten, Larondelle, Yvan, Donnay , Isabelle, Debier , Cathy, Guignard, Cédric, Cilla , Antonio, Baldermann , Susanne, Iddir, Mohammed, UCL - SST/LIBST - Louvain Institute of Biomolecular Science and Technology, UCL - Faculté des Sciences, Bohn, Torsten, Larondelle, Yvan, Donnay , Isabelle, Debier , Cathy, Guignard, Cédric, Cilla , Antonio, Baldermann , Susanne, and Iddir, Mohammed

Abstract

Carotenoids are secondary plant metabolites with antioxidant and anti-inflammatory properties. Some can be converted into vitamin-A. Their dietary intake and tissue concentrations have been related to the reduced incidence of several chronic diseases. Due to their low water solubility requiring emulsification prior to absorption, carotenoids are of low and varying bioavailability. While dietary fiber, lipids, and minerals were shown to influence the solubilization of carotenoids, a prerequisite for their bioavailability, the interactions between proteins and carotenoids during gastro-intestinal (GI) digestion have, to our knowledge, never been studied systematically. The purpose of the PhD thesis was thus to study interactions of carotenoids and frequently consumed proteins during digestion that could impact aspects of carotenoid bioavailability. Preceding a confirmatory human trial, in vitro studies were conducted, by means of GI digestion coupled to Caco-2 cellular uptake models to investigate bioaccessibility and cellular uptake, respectively. When investigating effects of whey and soy protein isolate (WPI, SPI), gelatin and sodium caseinate on individual carotenoids, carotene bioaccessibility increased by almost 2-fold, while xanthophylls were reduced in their bioaccessibility to about half. Similarly, for real food matrices, bioaccessibility and uptake were more enhanced for apolar carotenes vs. xanthophylls. In the human trial, WPI improved by about 1/3 the bioavailability of carotenoids from the tomato/carrot juice, while SPI had a borderline negative effect, confirming in vitro results. These findings may aid consumers in choosing meal compositions, especially persons relying on carotenoids for meeting vitamin A requirements, such as vegetarians, or those living in areas with low available pre-formed vitamin A. The results may also be interesting for food/supplement producers, offering insights into formulations that assure high carotenoid bioavailability., (AGRO - Sciences agronomiques et ingénierie biologique) -- UCL, 2022

Published
2022

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