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Vitamin C als potenzieller Modulator inflammatorischer Prozesse bei Endometriose (2025)
Dapprich, Janina ; Markant, Anja ; Fischer, Tobias
Nature-Based Interventions Promoting the Well-Being of Finnish Youth Outside Education or Employment (2025)
Kutu Obeng, James ; Kangas, Katja ; Manninen, Outi ; Stamm, Ingo ; Tolvanen, Anne
Nature-based interventions have a potential to activate and rehabilitate youth facing challenges with social, mental, or physical functioning. In Finland, nature-based interventions have been integrated into youth workshops to foster sustainable well-being. Using an exploratory mixed-methods design, this study explores the value of nature-based interventions for the well-being of Finnish youth outside education or employment. Participants (N = 18, aged 20-26) were drawn from three nature-based youth workshops. Sixteen participants completed survey questionnaires assessing the cognitive and social outcomes of the interventions and the key elements contributing to their effectiveness. Nine participants took part in qualitative interviews. Thematic analysis of the interview data revealed that the interventions promoted factors supporting well-being, including physical activity, structure and routine, skill development, social belonging, and meaningful participation. Participants also reported enhanced connections with nature and sustainable lifestyles. Central to these well-being experiences were the therapeutic benefits of nature, meaningful nature-related activities, and supportive social contexts. This study provides valuable insights for social workers and social service professionals to leverage nature for health and social outcomes among marginalized youth. Future research should investigate young people’s preferred environments and activities toward developing tailored nature-based interventions that promote positive well-being experiences.
Die Bedeutung ökologischer Gerechtigkeit für die Menschenrechtsprofession Soziale Arbeit: Impulse für eine Erweiterung ihrer Ethik (2025)
Kieslinger, Kristina ; Schmelz, Andrea ; Schramkowski, Barbara ; Stamm, Ingo ; Dörfler, Lisa
Social work practitioners’ views of ecosocial work (2025)
Närhi, Kati ; Matthies, Aila-Leena ; Stamm, Ingo ; Hirvilammi, Tuuli
Nachhaltigkeit im Bauwesen – Kreislaufschließung bei Geokunststoffen (2022)
Flamme, Sabine ; Depenbrock, Niclas ; Heimbecher, Frank ; Walter, Gotthard
Influencing Factors of Unsteady Room Ventilation on the Room Airflow: Overview of Results - Part I: A Comparative Study between Steady and Unsteady Ventilation Strategies (2025)
Mesenhöller, Eva
Advanced atmospheric pressure CVD of a-Si:H using pure and cyclooctane-diluted trisilane as precursors (2024)
Fischer, Benedikt ; Nuys, Maurice René ; Astakhov, Oleksandr ; Haas, Stefan ; Schaaf, Michael ; Besmehn, Astrid ; Jakes, Peter ; Eichel, Rüder-A. ; Rau, Uwe
Liquid silanes can be used for low-cost, fast deposition of hydrogenated amorphous silicon (a-Si:H) as an alternative to state-of-the-art deposition processes such as plasma enhanced chemical vapor deposition or electron beam evaporation. However, liquid silane deposition techniques are still in their infancy. In this paper, we present a new version of the atmospheric pressure chemical vapor deposition technique designed to improve the reproducibility of a-Si:H deposition. With this new tool, we explore ways to improve the quality of the material. The films can be prepared using pure trisilane as a precursor; frequently, however, trisilane is diluted with cyclooctane for better handling and process control. Currently, the influence of this dilution on the film quality is not well understood. In our work, we investigate and compare both precursor strategies. This paper presents a comprehensive analysis of the effects of cyclooctane dilution, deposition temperature, process duration, and precursor amount on the structure stoichiometry and electronic properties of the resulting films. The analysis was performed using a range of techniques, including Fourier transform infrared spectroscopy, electronic spin resonance spectroscopy, Raman spectroscopy, ellipsometry, secondary ion mass spectrometry, and conductivity measurements. For films deposited with pure silane, we found a low oxygen (O) and carbon (C) impurity incorporation and an adjustable H content up to 10%, resulting in a photosensitivity of up to 104. Dependent on the dilution and deposition temperature, the films deposited with cyclooctane dilution showed various amounts of C incorporation, culminating in an a-Si:H/a-SiC:H structure for high temperatures and dilutions. High purity a-Si:H films as a-Si:C:H films are promising for application in solar cells and transistors either as an amorphous functional layer or as a precursor for recrystallization processes, e.g., in TOPCon solar cell technology.
Synthesis and Characterization of Nitrogen-Doped Crystallized SiC Films from Liquid Precursors (2025)
Fischer, Benedikt ; Nuys, Maurice René ; Haas, Stefan ; Thimm, Oliver ; Schöpe, Gunnar ; Foucart, Pascal ; Besmehn, Atrid ; Rau, Uwe
Silicon carbide (SiC) is an established material for photovoltaics and other semiconductor devices due to its wide band gap and high thermal stability. Traditional deposition systems for thin, doped SiC layers are often costly and complex. This study investigates the use of 1,4-disilabutane as a low-cost liquid precursor with a rather low decomposition temperature for the deposition of hydrogenated amorphous silicon carbide (a-SiC:H) films at atmospheric pressure. Nitrogen doping was achieved using 1,1,3,3-tetramethyldisilazane. The films were characterized by Fourier-transform infrared spectroscopy, Raman spectroscopy, secondary ion mass spectrometry, and conductivity measurements. Optimizing the deposition temperature maximized the Si–C bond density. Crystallization was induced by annealing at temperatures between 800 and 1100 °C, resulting in a three-order-of-magnitude increase in conductivity. The highest conductivity achieved was 0.03 S cm–1 for crystalline, N-doped SiC films. This cost-effective method for producing highly conductive, crystalline SiC films offers significant potential for industrial applications.
Recycling Strategies for Spent Consumer Lithium-Ion Batteries (2024)
Flamme, Sabine ; Petzold, Moritz
More resource efficient recycling of copper and copper alloys by using X-ray fluorescence sorting systems: An investigation on the metallic fraction of mixed foundry residues (2024)
Flamme, Sabine ; Kölking, Max ; Schmalbein, Nico ; Heinrichs, Stefan ; Jacob, Martin
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