A self-heating sealant or adhesive may be formed using multi-compartment microcapsules dispersed within a sealant or adhesive. The multi-compartment microcapsules produce heat when subjected to a stimulus (e.g., a compressive force, a magnetic field, or combinations thereof). In some embodiments, the multi-compartment microcapsules have first and second compartments separated by an isolating structure adapted to rupture in response to the stimulus, wherein the first and second compartments contain reactants that come in contact and react to produce heat when the isolating structure ruptures. In some embodiments, the multi-compartment microcapsules are shell-in-shell microcapsules each having an inner shell contained within an outer shell, wherein the inner shell defines the isolating structure and the outer shell does not allow the heat-generating chemistry to escape the microcapsule upon rupture of the inner shell.

A magnetic nanoparticle including a TRPV1 agonist, as well as methods of preparation and use, are described herein. A magnetically responsive pharmaceutical can include a core region having a magnetic nanoparticle (MNPs) and a TRPV1 protein agonist. Further, an exterior coating comprising a polymer can be formed around the core region. The magnetically responsive pharmaceutical can be administered to a recipient and directed to a target region using an external magnetic field.

A preparation method of Bacillus subtilis biological composite material loaded with Fe.sub.3O.sub.4 magnetic nanoparticles with core-shell structure includes the following steps: 1) preparation of Fe.sub.3O.sub.4 nanoparticles, 2) preparation of Fe.sub.3O.sub.4@mSiO.sub.2 nanoparticles, 3) preparation of Fe.sub.3O.sub.4@mSiO.sub.2@MANHE nanoparticles; and 4) preparation of Bacillus subtilis@Fe.sub.3O.sub.4@mSiO.sub.2@MANHE composite.

A magnetic nanoparticle includes a magnetic core and a superparamagnetic outer shell, in which the outer shell enhances magnetic properties of the nanoparticle. The enhanced magnetic properties of the magnetic nanoparticle allow for highly sensitive detection as well as diminished non-specific aggregation of nanoparticles.

The present invention provides a method of treating a condition affecting a tooth or periodontium in a subject, comprising administering to the subject's tooth or periodontium a composition comprising biocompatible magnetic, magnetizable, or magnetically responsive agents; and applying an external magnetic field, wherein the magnetic, magnetizable, or magnetically responsive agents migrate to a desired location in response to the externally applied magnetic field, thereby treating a condition affecting the tooth or periodontium in the subject.

A magnetic particle comprises a polysaccharide matrix and a plurality of magnetic crystals dispersed in the matrix. A method for making magnetic particles comprises combining a basic solution with a metal ion solution and allowing the metal ions to oxidize to form magnetic crystals, and combining the magnetic crystals with a polysaccharide solution to form the magnetic particles.

A preparation method of Bacillus subtilis biological composite material loaded with Fe.sub.3O.sub.4 magnetic nanoparticles with core-shell structure includes the following steps: 1) preparation of Fe.sub.3O.sub.4 nanoparticles, 2) preparation of Fe.sub.3O.sub.4@mSiO.sub.2 nanoparticles, 3) preparation of Fe.sub.3O.sub.4@mSiO.sub.2@MANHE nanoparticles; and 4) preparation of Bacillus subtilis@Fe.sub.3O.sub.4@mSiO.sub.2@MANHE composite.

Living cells, such as red blood cells (RBCs) modified with functional micromotors with the aid of ultrasound propulsion and magnetic guidance. Iron oxide nanoparticles are loaded into the RBCs, where their asymmetric distribution within the cells results in a net magnetization, thus enabling magnetic alignment and guidance under acoustic propulsion. The RBC motors display efficient guided and prolonged propulsion in various biological fluids, including undiluted whole blood.

Provided are a SAMiRNA-magnetic nanoparticle complex capable of effectively delivering a double-stranded oligo RNA and magnetic nanoparticles into a cell and a composition capable of simultaneously performing diagnosis and therapy of diseases such as cancer, and the like, containing the same. More specifically, provided is the SAMiRNA-magnetic nanoparticle complex consisting of double-stranded oligo RNA-polymer structures in which a hydrophilic material and a second hydrophobic material are bound to the double-stranded oligo RNA by a simple covalent bond or a linker-mediated covalent bond, and the magnetic nanoparticles in which a first hydrophobic material is bound onto a surface of the magnetic material, as a core. The SAMiRNA-magnetic nanoparticle complex may have a homogeneous size by a hydrophobic interaction between the first hydrophobic material of the present invention and the second hydrophobic material of the double-stranded oligo RNA structure. In addition, the hydrophilic material and the second hydrophobic material bound to the double-stranded oligo RNA structure may improve in vivo stability of the double-stranded oligo RNA, an additionally bound ligand may deliver the SAMiRNA-magnetic nanoparticle complex into a target cell even at a relative low concentration of dosage, and the magnetic materials of the magnetic nanoparticles may be used as an imaging agent for diagnosis.

A self-heating sealant or adhesive may be formed using multi-compartment microcapsules dispersed within a sealant or adhesive. The multi-compartment microcapsules produce heat when subjected to a stimulus (e.g., a compressive force, a magnetic field, or combinations thereof). In some embodiments, the multi-compartment microcapsules have first and second compartments separated by an isolating structure adapted to rupture in response to the stimulus, wherein the first and second compartments contain reactants that come in contact and react to produce heat when the isolating structure ruptures. In some embodiments, the multi-compartment microcapsules are shell-in-shell microcapsules each having an inner shell contained within an outer shell, wherein the inner shell defines the isolating structure and the outer shell does not allow the heat-generating chemistry to escape the microcapsule upon rupture of the inner shell.