油画笔

LINEAR MOTOR AND ELECTRONIC DEVICE

The present application provides a linear motor and an electronic device. The linear motor comprises a drive assembly, an oscillator assembly, an elastic support member for supporting the oscillator assembly, and a housing having an accommodation space. The oscillator assembly comprises a mass block provided with a mounting cavity and a magnetic steel group provided in the mounting cavity; the mounting cavity comprises a first mounting recess and a second mounting recess; the magnetic steel group comprises a first magnetic steel and a second magnetic steel; the first magnetic steel matches the first mounting recess, and the second magnetic steel matches the second mounting recess; the orthographic projection of the second magnetic steel on the first magnetic steel in a vibration direction is at least partially located outside the first magnetic steel. According to the linear motor in the present embodiment, the first mounting recess and the second mounting recess staggered with each other ...

Cross-linked anion exchange membrane and preparation method thereof

The invention discloses a cross-linked anion exchange membrane and a preparation method thereof, the preparation method comprises the following steps: (1) dissolving 2, 3-epoxypropyltrimethylammonium chloride in a first organic solvent, adding a dimethylamine solution, and reacting to obtain a compound as shown in a formula I; (2) carrying out reaction on polyphenyl ether and N-bromosuccinimide to obtain brominated polyphenyl ether; (3) carrying out a reaction on the brominated polyphenyl ether and 2-hydroxy-3-dimethylamino-propyl trimethyl ammonium chloride; adding a polyvinyl alcohol solution, and continuously reacting; adding a cross-linking agent and a pH regulator, and reacting to obtain a reaction solution; pouring the reaction liquid into a mold, and drying to obtain the halogen type cross-linked anion exchange membrane; carrying out ion exchange on the halogen type cross-linked anion exchange membrane and an alkali solution to obtain a cross-linked anion exchange membrane of which ...

Method for recovering silver from silver-containing waste

The invention relates to a method for recovering silver from a silver-containing waste material, which comprises the following steps: preparing an electrolyte from sodium thiosulfate pentahydrate, potassium citrate, sodium acetate, sodium hydroxide and sodium trithiosulfuric acid silver (I) acid (Na5 [Ag (S2O3) 3]) and H2O, regulating the electrolytic voltage to 0.01-0.10 V/cm < 2 > in the electrolyte, and electrolyzing for 5-60 minutes until silver and a silver alloy layer in the waste material are completely electrolyzed, and washing the electrolyzed silver powder with deionized water, filtering and drying to obtain the silver powder. According to the method, the silver recovery rate can reach 99%, the problems that electrolysis equipment in strong acid and strong alkali solutions is prone to corrosion, environment pollution, staff injury and the like are solved, and the method has the advantages of being easy and controllable to operate and capable of being repeatedly used and has good ...

Anion exchange membrane synthesized in water phase and preparation method thereof

The invention discloses a water-phase synthesized anion exchange membrane and a preparation method thereof, and the preparation method comprises the following steps: (1) dissolving chitosan in a first water-based solvent to obtain a chitosan solution; (2) uniformly mixing a chitosan solution and a polydiene dimethyl ammonium chloride aqueous solution, and centrifugally defoaming; separating out a gel film in a second aqueous solvent; (3) desalting and dehydrating the gel membrane to obtain a chloride ion type anion exchange membrane; and carrying out ion exchange on the chloride ion type anion exchange membrane to obtain the oxyhydrogen type anion exchange membrane. The preparation method of the anion exchange membrane is simple, green and environment-friendly. The obtained anion exchange membrane has the characteristics of uniform membrane formation, low swelling, relatively high water content and ionic conductivity and excellent chemical stability.

Method for correcting lung cancer immunotherapy drug resistance by inhibiting TMPRSS4

The invention provides a method for correcting lung cancer immunotherapy drug resistance by inhibiting TMPRSS4, and relates to the technical field of biomedicine, in particular to application of a TMPRSS4 inhibitor in drugs for enhancing anti-tumor immunity. The invention mainly aims at providing an optimized macrophage-tumor cell co-culture system, and knocking out TMPRSS4 gene expression of tumor cells by using a CRISPR (clustered regularly interspaced short palindromic repeats) technology to achieve the effect of promoting the function of phagocytizing the tumor cells by the macrophages. And secondly, by inhibiting the expression of the TMPRSS4 gene and combining the TMPRSS4 gene with an immune checkpoint inhibitor, the anti-tumor immunotherapy effect is remarkably enhanced.

Room-temperature antiferromagnetic memory device and preparation method thereof

The invention provides a room-temperature antiferromagnetic memory device and a preparation method thereof. The room-temperature antiferromagnetic memory device comprises a substrate and an antiferromagnetic oxide functional layer located on one side of the substrate. The anti-ferromagnetic oxide functional layer in the room-temperature anti-ferromagnetic memory device provided by the invention utilizes the characteristics that the spin kinetic characteristic frequency of an anti-ferromagnetic oxide material is THz and the anti-ferromagnetic oxide material is insensitive to an external magnetic field, so that the room-temperature anti-ferromagnetic memory device has the advantages of high response speed and high-intensity magnetic field interference resistance; secondly, an external electric field is used for replacing a magnetic field or current to be applied to the substrate to generate piezoelectric stress, the antiferromagnetic oxide functional layer changes the orientation of an antiferromagnetic ...