No abstract

P–T–X phase diagrams of the ternary tetrabutylammonium bromide (TBAB)–methane–water systems have been studied by differential thermal analysis under pressure up to 40 MPa and 1.2, 2.6, and 4.1 mol % TBAB. It was shown by X-ray powder diffraction that a double hydrate of TBAB + methane of hexagonal structure I (HS-I) was formed in the TBAB–methane–water system under the studied conditions. The methane capacity of the double hydrates has been measured by volumetric analysis. It was concluded that substitutional solid solution with any significant displacement of the TBA cation by methane molecules was not formed.

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Magnetic nanoparticles have been widely used in nanobiomedicine for diagnostics and the treatment of diseases, and as carriers for various drugs. The unique magnetic properties of “magnetic” drugs allow their delivery in a targeted tumor or tissue upon application of a magnetic field. The approach of combining magnetic drug targeting and gene delivery is called magnetofection, and it is very promising. This method is simple and efficient for the delivery of genetic material to cells using magnetic nanoparticles controlled by an external magnetic field. However, magnetofection in vivo has been studied insufficiently both for local and systemic routes of magnetic vector injection, and the relevant data available in the literature are often merely descriptive and contradictory. In this review, we collected and systematized the data on the efficiency of the local injections of magnetic nanoparticles that carry genetic information upon application of external magnetic fields. We also investigated the efficiency of magnetofection in vivo, depending on the structure and coverage of magnetic vectors. The perspectives of the development of the method were also considered.