Publications by authors named "R Bernat"
A photoinduced reversible addition-fragmentation chain-transfer (photo-RAFT) polymerization technique in the presence of sodium pyruvate (SP) and pyruvic acid derivatives was developed. Depending on the wavelength of light used, SP acted as a biocompatible photoinitiator or promoter for polymerization, allowing rapid open-to-air polymerization in aqueous media. Under UV irradiation (370 nm), SP decomposes to generate CO and radicals, initiating polymerization.
View Article and Find Full Text PDFThis study presents a novel approach by utilizing poly(vinylpyrrolidone)s (PVPs) with various topologies as potential matrices for the liquid crystalline (LC) active pharmaceutical ingredient itraconazole (ITZ). We examined amorphous solid dispersions (ASDs) composed of ITZ and () self-synthesized linear PVP, () self-synthesized star-shaped PVP, and () commercial linear PVP K30. Differential scanning calorimetry, X-ray diffraction, and broad-band dielectric spectroscopy were employed to get a comprehensive insight into the thermal and structural properties, as well as global and local molecular dynamics of ITZ-PVP systems.
View Article and Find Full Text PDFIn this study, a high-pressure-assisted photoinduced atom transfer radical polymerization ( ≤ 250 MPa) enabled the synthesis of ultra-high-molecular-weight polymers (UHMWPs) of up to 9 350 000 and low/moderate dispersity (1.10 < < 1.46) in a co-solvent system (water/DMSO), without reaction mixture deoxygenation.
View Article and Find Full Text PDFArticle Synopsis
- Individual monitoring of external radiation is regulated by national bodies, ensuring that services meet specific technical standards for accurate dosimetry results.
- Accreditation to the ISO/IEC 17025 standard is increasingly common among European individual monitoring services, enhancing the reliability of their measurements and facilitating international acceptance of results.
- A guide has been developed by EURADOS to help these services navigate the accreditation process, detailing how to meet ISO/IEC 17025 requirements with practical examples and assistance for audits.
Article Synopsis
- The study examines how large-area 4H-SiC Schottky barrier diodes respond to radiation from ionizing particles, focusing on two diode sizes: 1 mm² and 25 mm².
- Thermal neutron converters, specifically LiF and BC films, were employed on top of the diodes, achieving a notable thermal neutron efficiency of 5.02% with the LiF converter, which is among the highest reported.
- The research also explores the temperature-dependent response of the diodes to alpha particles, with irradiations conducted using a JSI TRIGA dry chamber and an Am-241 alpha source for testing.