Abstract: A drug-loaded medical device, a preparation method therefor, a drug balloon and a method of preparing a drug coating are disclosed. The medical device or the drug balloon is provided on a surface thereof with a drug coating including a stabilizer and a drug. The stabilizer includes an amphiphilic triblock polymer with hydrophilic segments at both terminals, and the drug coating forms a nano-drug particle suspension in a water-soluble environment. In this way, the prepared nano-drug coating has high drug loading and can deliver the drug in a desirable way. In particular, when it comes into contact with water, the drug can be restored to the original nano size, almost without any particle size increase. This not only avoids the risk of embolism caused by granules, but also enables higher device safety, increased drug uptake and improved therapeutic effects.

Abstract: Provided are a drug-loaded implantable medical instrument and a manufacturing method therefor. The drug-loaded implantable medical instrument (10) comprises an instrument body (100), a microporous membrane (200) fixed on the instrument body (100), and a nanocrystal medicament (300) loaded on the microporous membrane (200). A method for preparing a drug-loaded implantable medical device includes: providing a microporous membrane; loading a nanocrystalline drug on the microporous membrane; and fixing the microporous membrane loaded with the nanocrystalline drug to the device body.

Abstract: A drug-loaded implanted medical device (10) and a preparation method therefor. The drug-loaded implanted medical device (10) comprises a device body (100), a hydrophilic coating layer (200) loaded on the device body (100), and crystalline drug particles (300) loaded on the hydrophilic coating layer (200). The hydrophilic coating layer (200) comprises a graft polymer containing a photo-crosslinked group. The medical device (10) uses a hydrophilic coating layer (200) as a carrier, effectively avoiding the risk of embolism, encouraging the crystalline drug particles to fall off, and helping to achieve a target tissue concentration. The invention can also effectively increase the anchoring effect between the carrier and the device, and reduce toxicity.

Abstract: Disclosed are a cationic nanodrug, a preparation method therefor, and a drug-loaded implantable medical device, wherein the cationic nanodrug comprises a vector and a drug loaded on the vector, and the vector comprises one or more of a cationic amphipathic compound and a cationic modifier; the cationic amphipathic compound is a cationic amphipathic compound containing amino and/or acyl; and the cationic modifier is a cationic modifier containing amino and/or acyl. The cationic nanodrug greatly improves the uptake of a drug by cells and has a good slow-release effect.

Abstract: An onboard multi-functional thermal-insulation and explosion-proof pressure steamer, relating to the technical field of heating cooking appliances, and in particular, to the field of cooking appliances mounted on a travelling apparatus, comprising a steamer body and a steamer outer cover covering the top of the steamer body, a steam pot being provided in the steamer body. The steam pot is provided in the steamer body to seal a steam container in the steam pot, and the steam pot is heated by means of the onboard heat energy, heat exchange is performed by means of a heat exchange device to generate high-temperature steam to heat the food material in the steam pot of the steam or to heat the water in a water tank.

Abstract: A parallel feed-forward compensation type three-phase power factor correction circuit for a three-phase power supply comprises a primary rectifying circuit I, and a feed-forward compensation circuit II which is in parallel with the primary rectifying circuit I. The primary bridge rectifier circuit I comprises a three-phase bridge and a filter capacitor. The feed-forward compensation circuit II comprises a plurality of bi-direction switches, a rectifying circuit, a boost converter, an output current sampler and a control circuit. In the corresponding phase interval the feed-forward compensation circuit sequentially closes the phase of that whose absolute value of the voltage is the higher one of the two phases at same polarity. The other two phases are rectified by bridge rectifying circuit and forced to export a compulsive current waveform. In this configuration, it can amend the current waveform of each phase, reduce harmonic distortion and improve the efficiency of the power supply with very little power.

Abstract: A parallel feed-forward compensation type three-phase power factor correction circuit for a three-phase power supply comprises a primary rectifying circuit I, and a feed-forward compensation circuit II which is in parallel with the primary rectifying circuit I. The primary bridge rectifier circuit I comprises a three-phase bridge and a filter capacitor. The feed-forward compensation circuit II comprises a plurality of bi-direction switches, a rectifying circuit, a boost converter, an output current sampler and a control circuit. In the corresponding phase interval the feed-forward compensation circuit sequentially closes the phase of that whose absolute value of the voltage is the higher one of the two phases at same polarity. The other two phases are rectified by bridge rectifying circuit and forced to export a compulsive current waveform. In this configuration, it can amend the current waveform of each phase, reduce harmonic distortion and improve the efficiency of the power supply with very little power.