Photo- and X-ray Induced Cytotoxicity of CeF-YF-TbF Nanoparticle-Polyvinylpyrrolidone-"Radachlorin" Composites for Combined Photodynamic Therapy.

The CeYTbF nanoparticles with a CeF hexagonal structure were synthesized using the co-precipitation technique. The average nanoparticle diameter was 14 ± 1 nm. The luminescence decay curves of the CeYTbF nanoparticles (λ = 541 nm, D-F transition of Tb) conjugated with Radachlorin using polyvinylpyrrolidone coating as well as without Radachlorin were detected.

Single-Stage Microfluidic Synthesis Route for BaGdF:Tb-Based Nanocomposite Materials: Synthesis, Characterization and Biodistribution.

Rare-earth-doped nanoscaled BaGdF is known as an efficient contrasting agent for X-ray micro-CT and NMR as well as a promising candidate for X-ray photodynamic therapy, thereby opening an opportunity for theragnostic applications. Conventional synthesis of Ln-doped BaGdF consider a long-lasting batch procedure, while a conjugation with photosensitizer usually implies a separate stage requiring active mixing. To the best of our knowledge, in this work, we for the first time obtain BaGdF:Tb nanophosphors in a microfluidic route at temperatures as low as 100 °C while decreasing the time of thermal treatment down to 6 min.

[Status of oral mucosa and periodontal tissue in children with gastroduodenal diseases associated with Helicobacter pylori].

General and dental status was evaluated in 64 children aged 5-14 years with active chronic gastroduodenitis and gastroduodenal ulcer. Helicobacter pylori was detected by the urease test and morphological analysis of gastric biopsy specimens with subsequent Giemsa or toluidine blue staining. The presence of Helicobacter pylori was confirmed by immunohistochemical analysis with monoclonal antibodies to this bacterium using DAKO kits.