Publications by authors named "M Koprowski"
Core-collapse supernovae are explosions of massive stars at the end of their evolution. They are responsible for metal production and for halting star formation, having a significant impact on galaxy evolution. The details of these processes depend on the nature of supernova progenitors, but it is unclear if Type Ic supernovae (without hydrogen or helium lines in their spectra) originate from core-collapses of very massive stars (>30 M) or from less massive stars in binary systems.
View Article and Find Full Text PDFThe reaction of (acetalaryl)arylmethanols with various phosphines PRRR (R = R = R = Ph; R = R = Ph, R = Me and R = R = Me, R = Ph) under acidic conditions (e.g., HCl, HBF, TsOH) unexpectedly led to the formation of (10-hydroxy-9,10-dihydroanthr-9-yl)phosphonium salts instead of the corresponding anthryl phosphonium salts.
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- - The study emphasizes the importance of high-resolution annual forest growth maps, using tree-ring width (TRW) data, to better understand forest carbon sequestration and the impact of climate change and drought on forest ecosystems.
- - By integrating high-resolution Earth observation data with climate and topography information, the researchers found that species-specific models could explain over 52% of variance in tree growth, enhancing the accuracy of growth predictions compared to using just climate and elevation data.
- - The research successfully generated a map of annual TRW for 2021, demonstrating that combining different data sources can lead to more effective models for forest growth, while also identifying areas where predictions may be less reliable, particularly in climate marginal zones.
The ecotoxicological impact of pharmaceuticals has received considerable attention, primarily focusing on active pharmaceutical ingredients (APIs) while largely neglecting the potential hazards posed by pharmaceutical excipients. Therefore, we analyzed the ecotoxicity of 16 commonly used pharmaceutical excipients, as well as 26 API-excipient and excipient-excipient mixtures utilizing the Microtox test. In this way, we assessed the potential risks that pharmaceutical excipients, generally considered safe, might pose to the aquatic environment.
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- The study investigates how modifying the chemical structure of acene molecules can enhance their electrical properties in organic thin films.
- It focuses on five specific 10-RO-acenes, which show varying electronic characteristics, and analyzes their hole mobility using experimental methods like SCLC and TOF.
- The results demonstrate a strong alignment between theoretical predictions and experimental data, suggesting that hole transport occurs through a hopping mechanism influenced by reorganization energy in these amorphous layers.