A Novel Cellular Imaging Method Using Hemagglutinating Virus of Japan-Envelope (HVJ-E) Vector and Magnetic Particle Imaging.

The purpose of this study was to develop a novel cellular imaging method using the hemagglutinating virus of Japan-envelope (HVJ-E) vector and magnetic particle imaging (MPI). First, we determined the concentration of magnetic nanoparticles (MNPs) suitable for encapsulation into the HVJ-E vector (HVJ-MNPs). Colon-26 cells were labeled with HVJ-MNPs, MNPs conjugated with protamine (Pro-MNPs) or MNPs alone (Res-MNPs), and their labeling efficiencies were evaluated.

Magnetic Nanoparticles in Macrophages and Cancer Cells Exhibit Different Signal Behavior on Magnetic Particle Imaging.

Cell labeling with magnetic nanoparticles (MNPs) is a promising method of cell tracking. In particular, a novel quantitative tomography method called magnetic particle imaging (MPI) has the potential to estimate the number of successfully transplanted MNP-labeled cells, thereby helping predict clinical outcomes. However, the biological factors that shape the MPI signals of MNPs during cell labeling are not well understood.

Hyperfine structure of the electron spin resonance of phosphorus-doped Si nanocrystals.

Electronic states of P donors in Si nanocrystals (nc-Si) embedded in insulating glass matrices have been studied by electron spin resonance. Doping of P donors into nc-Si was demonstrated by the observation of optical absorption in the infrared region due to intraconduction band transitions. P hyperfine structure (hfs) was successfully observed at low temperatures.