The use of alpha particles irradiation in clinical practice has gained interest in the past years, for example with the advance of radionuclide therapy. The lack of affordable and easily accessible irradiation systems to study the cell biological impact of alpha particles hampers broad investigation. Here we present a novel alpha particle irradiation set-up for uniform irradiation of cell cultures. By combining a small alpha emitting source and a computer-directed movement stage, we established a new alpha particle irradiation method allowing more advanced biological assays, including large-field local alpha particle irradiation and cell survival assays. In addition, this protocol uses cell culture on glass cover-slips which allows more advanced microscopy, such as super-resolution imaging, for in-depth analysis of the DNA damage caused by alpha particles. This novel irradiation set-up provides the possibility to perform reproducible, uniform and directed alpha particle irradiation to investigate the impact of alpha radiation on the cellular level.
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http://dx.doi.org/10.3390/mps2030075 | DOI Listing |
Foods
January 2025
Laboratory of Chemistry of Foods and Bioactives, Department of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa 320001, Israel.
Consumer sex influences phenotypic differences in digestive functions that may underlie variations in food disintegration. This study used an in vitro digestion model to test the hypothesis that emulsions follow distinct digestive pathways in men and women. Model emulsions were prepared using medium-chain triglycerides stabilized by beta-lactoglobulin, alpha-lactalbumin, or lactoferrin, and by three non-protein emulsifiers: Tween 80, lecithin, and sucrose esters.
View Article and Find Full Text PDFMaterials (Basel)
January 2025
Jinduicheng Molybdenum Co., Ltd., Xi'an 710077, China.
The ultrafine MoO powders were prepared by the combination of centrifugal spray drying and calcination in this work. The thermal decomposition behavior of the spherical precursor was studied. The phase constituents, morphologies, particle size, and specific surface areas of MoO powders were characterized at different temperatures.
View Article and Find Full Text PDFMolecules
January 2025
Department of Physical Chemistry, Faculty of Chemical Technology, University of Pardubice, nam. Cs Legii 565, 532 10 Pardubice, Czech Republic.
The particle size-dependent processes of structural relaxation and crystal growth in amorphous nifedipine were studied by means of non-isothermal differential scanning calorimetry (DSC) and Raman microscopy. The enthalpy relaxation was described in terms of the Tool-Narayanaswamy-Moynihan model, with the relaxation motions exhibiting the activation energy of 279 kJ·mol for the temperature shift, but with a significantly higher value of ~500 kJ·mol being obtained for the rapid transition from the glassy to the undercooled liquid state (the latter is in agreement with the activation energy of the viscous flow). This may suggest different types of relaxation kinetics manifesting during slow and rapid heating, with only a certain portion of the relaxation motions occurring that are dependent on the parameters of a given temperature range and time frame.
View Article and Find Full Text PDFInt J Pharm
January 2025
Department of Pharmaceutics, Faculty of Pharmacy, Damanhour University, Damanhour 22511, Egypt. Electronic address:
Parkinson's disease (PD) is a debilitating neurodegenerative disorder characterized by motor and non-motor symptoms, with limited effective treatment options. This study proposes a novel approach utilizing intranasal delivery of carbenoxolone (CBX) via chitosan-coated solid lipid nanoparticles (CS-coated SLNs) to manage PD symptoms by enhancing CBX delivery and brain targeting. Formulated CS-coated SLNs exhibited favorable quality attributes including particle size (164 ± 0.
View Article and Find Full Text PDFInhalation of crystalline silica particles causes silicosis, which is a severe inflammatory lung disease that is associated with granulomatous and fibrotic responses. We investigated whether silica-induced silicosis might promote airway hyperreactivity (AHR) and the role of TNF-α and thalidomide in this process. Mice received an intranasal instillation of silica particles (1.
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