9 results about "Reactive nitrogen" patented technology

The application belongs to the technical field of low-temperature plasma nitrogen fixation, and particularly relates to a circulating plasma nitrogen fixation method and device of double dielectric barrier discharge, which comprises the following steps: introducing air into a spatial dielectric barrier discharge system to perform first discharge activation, generating plasma activation gas containing active nitrogen-oxygen species, introducing the gas into a liquid container to perform gas-liquid reaction in the form of bubbling with the liquid, and setting a surface dielectric barrier discharge area above the liquid to perform secondary discharge activation on residual gas. Through a gas circulation channel, the residual gas reenters the spatial dielectric barrier discharge system, realizing the circulation utilization of the same gas in the system through multiple discharges and multiple gas-liquid reactions. Through the above two-electrode discharge and gas reflux mechanism, the generation amount of active nitrogen-oxygen species and the conversion efficiency thereof into the liquid phase can be significantly improved, direct discharge of residual gas is reduced, the gas utilization rate is improved, and the application is suitable for the field of plasma nitrogen fixation.

This invention discloses a solution for inhibiting keloids and its preparation method. Physiological saline is treated with low-temperature atmospheric pressure plasma (CAP) to become activated saline. The activated saline contains a large amount of reactive oxygen species and reactive nitrogen species. After injection into the body, its active ingredients induce disulfide death in fibroblasts derived from keloids, thereby inhibiting keloid formation. Compared with existing methods for inhibiting keloids, this application has several unique advantages. First, the effect and degree of CAP activation on fibroblast life and death are dose-dependent, allowing for precise control of the effect. Second, the full spectrum of active species generated by CAP can synergistically act on multiple biological targets, reducing the risk of recurrence. Third, CAP is administered through the process of generating an activated solution from a liquid medium, enabling non-invasive or minimally invasive drug delivery and greatly reducing the risk of systemic toxicity. Finally, CAP technology avoids complex biological agent preparation processes, making it simpler to operate and lower in cost. This invention fills the gap in research on low-temperature atmospheric pressure plasma inhibition of keloids.

The application belongs to the technical field of nanobubble hydrate preparation, and discloses a multi-field coupling ozone and active particle hydrate generating device, which comprises: a main machine, an inner cavity of which comprises an electrolysis area and an ionization area; an ultrasonic generator, which is installed to the main machine and acts on the inner cavity; a venturi pipe, an outlet of which is connected to the electrolysis area of the main machine to feed the micro-nanobubble water formed by mixing air and water into the electrolysis area; and a water outlet pipe, an inlet of which is connected to the ionization area of the main machine. The electrolysis area and the ionization area are horizontally arranged and are separated by an electrode partition. In summary, the device generates hydrates containing strong oxidizing substances such as ozone, active oxygen, active nitrogen and free radicals through the multi-field coupling effects of venturi gas-liquid mixing, electrolytic air floatation pretreatment, ultrasonic enhanced bubble splitting and triggered ionization electric field plasma waterfall, and can also effectively improve the number and stability of ozone nanobubbles in the hydrates.

This invention relates to the field of biomedical antibacterial nanomaterials technology, specifically to an L-arginine-functionalized TiO2. 2‑x Preparation method and application of MXene composite nanomaterials. The preparation method of this invention includes: preparing Ti3C2T using the LiF / HCl in-situ etching method. x MXene dispersion; Ti3C2T x MXene is mixed with glycerol and then subjected to a hydrothermal reaction, forming TiO2 in situ on the MXene surface. 2‑x TiO 2‑x -MXene; further functionalization with L-arginine yields LA@TiO 2‑x -MXene composite nanomaterials. The materials of this invention exhibit excellent near-infrared photothermal response and ultrasonic response acoustic dynamic activity, and can generate NO and ONOO under ultrasonic stimulation. ‑ The materials of this invention can be used to prepare anti-MRSA antibacterial materials, anti-biofilm materials, antibacterial dressings, or antibacterial coatings for medical device surfaces, exhibiting synergistic antibacterial effects of photothermal, acoustic dynamic, and active nitrogen species.

The application discloses a nitrogen oxide treatment agent and a preparation process thereof, and relates to the technical field of air pollution treatment and environmental protection. The composite alkaline component is composed of a sodium-based compound and an activator; the nitrogen-containing reducing agent is a pyrolytic nitrogen-containing organic matter; the stabilizer system is composed of a thickening agent and a chelating agent; and the solvent is deionized water. The composite alkaline component is used for providing an alkaline environment, assisting in oxidizing low-valence nitrogen oxides, and accelerating the decomposition of nitrogen oxides. x The nitrogen-containing reducing agent generates active nitrogen species under alkaline conditions, and the active nitrogen species and NO x react to generate nitrogen and water through a reduction reaction. In the application, the sodium-based compound, the activator and the pyrolytic nitrogen-containing organic matter realize the efficient removal of NO The application solves the technical problems of high treatment cost and low efficiency in current environmental pollution, and does not need to be catalyzed by an expensive catalyst.

The present invention relates to a plasma filter for purifying contaminated air in the atmosphere, comprising a housing having a fluid flow path formed in the direction of air flow, a charging section disposed at the inlet side of the fluid flow path, a dust collection section including at least one dust collection electrode disposed spaced apart from the charging section and extending to the outlet side of the housing while being disposed in a direction parallel to the fluid flow path, and at least one surface dielectric barrier discharge source, wherein pathogens are charged in the charging section, a DC high voltage is applied to at least one collecting electrode to induce the charged pathogens to the surface dielectric barrier discharge source or the surface of the collecting electrode, an AC or pulse voltage is applied to the surface of the surface dielectric barrier discharge source to generate a surface dielectric barrier discharge plasma, and pathogens are disinfected by the generated plasma and / or active oxygen species or active nitrogen species generated by the plasma.

The application discloses a kind of preparation methods of plasma activated water based on three-chamber coupling and intelligent regulation and control.The method includes electrolytic unit, discharge unit, mixing unit and intelligent control unit, wherein the electrolytic unit includes cathode chamber and anode chamber, ion exchange membrane is arranged between the two, and corresponding anode effluent and cathode effluent are generated through cathode oxygen reduction path or anode water oxidation path;Discharge unit generates discharge effluent containing active nitrogen species by plasma discharge method.Through mixing and intelligent control unit, the mixing ratio and mixing order of discharge effluent, cathode effluent and anode effluent generated by different paths are intelligently controlled, so as to obtain plasma activated water with precisely customized physicochemical properties, to be suitable for sterilization and disinfection, agricultural application and use scenarios with higher environmental compatibility requirements.

The invention discloses network enhanced fluorescent composite fireproof glass and a preparation method thereof. The preparation method comprises the following steps: S1, preparing reactive nitrogen-doped fluorescent carbon dot dispersion liquid of which the surface is simultaneously bonded with amino and silicon hydroxyl from a carbon source, a nitrogen source and a silane coupling agent through a hydrothermal reaction; s2, mixing and concentrating alkaline silica sol and polyol, adding the carbon dot dispersion liquid and an alkaline activator for reaction, and performing vacuum defoaming to obtain groutable intermediate liquid; s3, grouting and curing to obtain the network enhanced fluorescent composite fireproof glass. Through in-situ synergistic reaction of a carbon source, a nitrogen source and a silane coupling agent, amino and silicon hydroxyl are bonded to the surfaces of the carbon dots at the same time, and the carbon dots are embedded into a silicon-oxygen network skeleton in a covalent bond mode through copolycondensation in the curing process to become a network structure constituent part. Experiments prove that the anti-counterfeiting function and network enhancement are coordinated, the DTG main peak temperature is increased by 30 DEG C, the fire endurance is improved, and the light transmittance is kept at 88% or above.

This invention provides a magnesium alloy, its preparation method, and its applications. The magnesium alloy comprises a magnesium alloy body and a peroxide coating covering the surface of the magnesium alloy body. A protein carrier is adsorbed on the surface of the peroxide coating, and a NO donor is loaded onto the surface of the protein carrier. The magnesium alloy body can generate hydrogen gas in situ within the acidic tumor microenvironment, downregulating the expression of heat shock proteins in tumor cells, making tumor cells sensitive to temperature, and killing tumor cells under a low-intensity alternating magnetic field. Simultaneously, the peroxide coating stimulates the release of NO from the NO donor in the acidic tumor microenvironment, while the magnesium alloy body promotes the production of heat-activated oxygen substances inside cancer cells, which further react with NO to produce more toxic reactive nitrogen substances, achieving further killing of tumor cells.