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Three-Layered Composite Scintillator Based on the Epitaxial Structures of YAG and LuAG Garnets Doped with Ce and Sc Impurities.
Materials (Basel)
August 2024
Faculty of Physics, Kazimierz Wielki University in Bydgoszcz, Powstańców Wielkopolskich Street 2, 85-090 Bydgoszcz, Poland.
In this study, we propose novel three-layer composite scintillators designed for the simultaneous detection of different ionizing radiation components. These scintillators are based on epitaxial structures of LuAG and YAG garnets, doped with Ce and Sc ions. Samples of these composite scintillators, containing YAG:Ce and LuAG:Ce single crystalline films with different thicknesses and LuAG:Sc single crystal substrates, were grown using the liquid phase epitaxy method from melt solutions based on PbO-BO fluxes.
View Article and Find Full Text PDFInvestigation of X-rays Beams Uniformity in Radiotherapeutic Tumor Treatment Procedure Using LuAG:Ce Crystal Detectors.
Materials (Basel)
August 2024
Faculty of Physics, Kazimierz Wielki University in Bydgoszcz, Powstańców Wielkopolskich Street 2, 85-090 Bydgoszcz, Poland.
In this study, Ce-doped LuAlO garnet (LuAG) crystal detectors, with a density of ρ = 6 g/cm and an effective atomic number Z = 62, are proposed as promising materials for radiotherapy applications. This type of detector demonstrates excellent uniformity of structural and optical properties, high thermoluminescence (TL) light yield, optimal position of main TL glow peaks at temperatures around 245-295 °C, and high radiation stability. The set of TL detectors made from LuAG:Ce single crystal was used to evaluate the uniformity of dose and energy spectra of X-ray radiation from a clinical accelerator with 6 MV and 15 MV beams at the Department of Medical Physics, Oncology Center in Bydgoszcz, Poland, and γ-rays from a Co source at the National Institute of Oncology in Warsaw.
View Article and Find Full Text PDFKazimierz Funk: Polish vitamins' discoverer.
Przegl Epidemiol
June 2024
Katedra i Zakład Anatomii Prawidłowej, Wydział Nauk Medycznych w Katowicach, Śląski Uniwersytet Medyczny w Katowicach, Polska.
Kazimierz Funk, born on February 23, 1884, in Warsaw, demonstrated an early inclination toward the field of human physiology. He charted his scientific trajectory within esteemed European scientific institutions, commencing at the age of 16 in Geneva, where he pursued studies in natural sciences. Subsequently, he continued his academic endeavors in Bern, culminating in the attainment of his doctorate in 1904.
View Article and Find Full Text PDFRole of antioxidants in the neurobiology of drug addiction: An update.
Biomed Pharmacother
June 2024
Pomeranian University in Słupsk, Institute of Biology, Arciszewski St. 22 B, Słupsk PL 76-200, Poland.
Relationships between protective enzymatic and non-enzymatic pro-antioxidant mechanisms and addictive substances use disorders (SUDs) are analyzed here, based on the results of previous research, as well as on the basis of our current own studies. This review introduces new aspects of comparative analysis of associations of pro-antixidant and neurobiological effects in patients taking psychoactive substances and complements very limited knowledge about relationships with SUDs from different regions, mainly Europe. In view of the few studies on relations between antioxidants and neurobiological processes acting in patients taking psychoactive substances, this review is important from the point of view of showing the state of knowledge, directions of diagnosis and treatment, and further research needed explanation.
View Article and Find Full Text PDFAssessment of Portuguese fitness centers: Bridging the knowledge gap on harmful microbial contamination with focus on fungi.
Environ Pollut
June 2024
H&TRC-Health & Technology Research Center, ESTeSL - Escola Superior de Tecnologia e Saúde, Instituto Politécnico de Lisboa, 1990-096, Lisbon, Portugal; Research Institute for Medicines (iMed.uLisboa), Faculty of Pharmacy, University of Lisbon, 1649-003, Lisbon, Portugal.
The lack of knowledge regarding the extent of microbial contamination in Portuguese fitness centers (FC) puts attendees and athletes at risk for bioaerosol exposure. This study intends to characterize microbial contamination in Portuguese FC by passive sampling methods: electrostatic dust collectors (EDC) (N = 39), settled dust (N = 8), vacuum filters (N = 8), and used cleaning mops (N = 12). The obtained extracts were plated in selective culture media for fungi and bacteria.
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