Research on the Structure and Performance of Bacterial Magnetic Nanoparticles

Abstract

Magnetite nanocrystals have been widely used in many fields. Recently, a new magnetite nanocrystals, called magnetosome, has been found in magnetotactic bacteria. In this article, we researched on the properties of magnetosomes in detail, such as crystalline, morphology, crystal-size distributions, vitro cytotoxicity, and magnetic properties and quantified primary amino groups on the magnetosomes membrane surface by fluorescamine assay for the first time. From the results, it was clear that magnetosomes have more potential in the biomedical applications than synthetic magnetite.

Magnetotactic Bacteria as Potential Sources of Bioproducts

“…Magnetosome cytotoxicity is apparently low as the viability of cells incubated with magnetosomes after 72 h was 90%. The MM of the magnetosome seems to provide better biocompatibility than synthetic magnetite [ 148 ].…”

Morphological Adjustments on Cable-Net Supporting the Reflector Panels of FAST Based on Rotation Axis Matrices and Geodesic Tracing Algorithm

“…In the process of FAST observation, any area of the spherical cable network will be adjusted to the specified paraboloid, so it is hoped that the mesh division of the spherical cable-net will be more uniform, and there is no obvious primary and secondary force of the main cable-net [4][5][6]. At the same time, the fewer types and quantities of spherical mesh, the more conducive to the dynamic adjustment of the reflecting surface structure.…”

“…Step 2: According to the projection coordinates of the three cable-net endpoints of the selected triangular panel on the plane, determine the center of gravity of the triangle: (6) According to the knowledge of computer graphics [10], the coordinates of triangular cable-nets on the surface are expanded on the reference plane: (7) Assuming that there are panels between the triangular strips of the surface, then perform iterations to expand the spatial triangular panels into planar triangular strips until all triangular panels are projected onto the plane (As is shown in figure 5).…”

Hierarchical lichee-like Fe3O4 assemblies and their high heating efficiency in magnetic hyperthermia*

“…Owing to their unique properties, 3D nanostructures, typically formed using nanoparticles (0D), nanorods (1D), and nanoplates (2D) as building blocks, have attracted extensive attention. [19][20][21][22][23] Meanwhile, although the magnetic properties of Fe 3 O 4 NPs have been investigated, [24] and Fe 3 O 4 NPs have been established as good materials for applications in MFH treatment, [25] the performance of hierarchical Fe 3 O 4 hollow assemblies and solid assemblies in hyperthermia has been rarely compared in the existing literature. Further, it is noteworthy that the research on magnetothermal effect is essentially at a nascent stage based on the simple analysis of experimental results, and the heat generation mechanism of magnetic NPs with hierarchical structure has not been described yet.…”