8results about How to "Scavenging active oxygen" patented technology

The invention discloses a preparation method and application of monatomic iron-doped carbon quantum dot nano enzyme, and the preparation method comprises the following steps: fully dispersing citric acid, urea and iron salt, and fully reacting in a closed container; the ferric salt is any one of ferric citrate, iron methionine or ferrous lactate. The monatomic iron-doped carbon quantum dot nano-enzyme provided by the invention is good in dispersity, excellent in water solubility and uniform and stable in structure, has efficient antioxidant enzyme activity, can be easily absorbed by plants, can remarkably improve the antioxidant capacity and stress resistance of the plants after being applied, can remove excessively accumulated active oxygen of the plants, and also can effectively inhibit the growth of the plants. The soil heavy metal pollution control agent can control soil heavy metal pollution, also can improve the removal efficiency of antioxidant enzymes in plants, reduce heavy metal absorption and increase the plant yield, has the characteristics of small dosage, low cost, high efficiency, high environmental safety and easy use, and provides a new technology and product choice with practical application value for treatment of soil heavy metal pollution.

The invention relates to the technical field of biomedical materials, and discloses an active oxygen responsive hydrogel coating for resisting vascular restenosis as well as a preparation method and application thereof, the active oxygen responsive hydrogel coating is a hydrogel coating obtained by crosslinking an active oxygen responsive-scavenging polymer prodrug and dopamine modified oxidized dextran; the hydrogel coating is transferred to the inner wall of a blood vessel along with high-pressure expansion of the balloon, responsively degrades under the stimulation of excessive active oxygen in lesion tissues, releases antioxidant drugs, effectively removes local excessive active oxygen, improves the inflammatory microenvironment and inhibits restenosis of the blood vessel.

The present invention provides an inhalable bionic nanomaterial for treating bacterial pneumonia of the lungs, and a preparation method and application thereof, belonging to the technical field of drug preparation. Mesoporous polydopamine nanoparticles A are prepared by a one-pot synthesis method using block polyether and 3,3',5,5'-tetramethylbenzidine as templates; levofloxacin is added to A, stirred and centrifuged, and freeze-dried to obtain nanoparticles B; RAW264.7 cells are resuspended after centrifugation, homogenized and centrifuged again to collect the supernatant, and the supernatant centrifugal precipitation is the prepared macrophage membrane C; the configured B solution and C are mixed, and a bionic nanomaterial D wrapped in a macrophage membrane coating is prepared by a direct extrusion method. The inhalable bionic nanomaterial prepared by the present invention can cross the complex lung barrier to target the inflammatory site to respond to the release of drugs, and can remove reactive oxygen to relieve lung inflammation, which is of great significance for the treatment of lung infection and has promotion and application value.

This invention discloses a strain of *Bosea vestrisii* and its application in promoting plant growth and improving salt tolerance. This strain is deposited at the China Center for Type Culture Collection (CCTCC) under accession number CCTCC M 2026307. *Bosea vestrisii* exhibits strong salt tolerance and possesses multiple growth-promoting functions, including secreting indoleacetic acid (IAA), synthesizing extracellular polysaccharides, and biological nitrogen fixation. Experiments show that applying this strain to wheat roots significantly increases plant height, root length, and biomass under salt stress, and enhances the activity of antioxidant enzymes (such as catalase, peroxidase, and superoxide dismutase) in the plant, effectively alleviating oxidative damage caused by salt stress. This invention provides a highly efficient and environmentally friendly microbial resource for improving saline-alkali soils, enhancing crop stress tolerance, and achieving sustainable agriculture.

The invention discloses an amino acid liquid fertilizer capable of enhancing crop stress resistance and a preparation method thereof, and belongs to the technical field of compound fertilizer preparation. The amino acid liquid fertilizer capable of enhancing crop stress resistance is prepared from the following components in parts by weight: 62 to 84 parts of xylitol, 30 to 43 parts of glucose, 30 to 42 parts of polypeptide, 8 to 12 parts of chelated trace elements, 10 to 15 parts of urea, 10 to 18 parts of composite fiber composite bacteria, 6 to 12 parts of amino acid derivatives and 80 to 100 parts of deionized water, the composite fiber composite bacteria are prepared from polyacrylonitrile, polyvinylpyrrolidone, polyvinylidene fluoride and beneficial bacteria, and the amino acid derivative is prepared from cassia twig, L-alanine and potassium hydroxide. The liquid fertilizer prepared by the method has the effects of promoting plant growth, increasing crop stress resistance and improving the water-retaining property of soil.

The application discloses an organic fertilizer based on smoldering fire soil ash and a biochar loading process and a preparation method thereof, and components are as follows in terms of weight parts: 40-50 parts of rotten crop straw, 30-40 parts of fire soil ash, 3-6 parts of humic acid and 3-5 parts of water-retaining agent. The application has the beneficial effect that the physical skeleton of soil aggregates is reconstructed at the micro level by introducing a nano-mineral skeleton construction agent and modified porous biochar. In combination with the electronic shuttling effect of the shuttling repair agent, not only is the activity of soil heavy metals effectively passivated, but also the migration risk of heavy metals to the above-ground part of tobacco plants is reduced, and the gradient release characteristics of the microencapsulated active core material are utilized to solve the nutrient loss problem of traditional organic fertilizers in the environment with large mountain slope and strong rainwater erosion. The structure can make the soil aggregate structure be improved by nearly 78% (up to 68.7%), and effectively lock soil moisture and nutrients.

The application discloses a traditional Chinese medicine microemulsion eye drop as well as a preparation method and application thereof, and comprises the following components in percentage by weight: 0.001% to 2.0% of baicalein, 0.001% to 2.0% of borneol, 0.1% to 20% of oil for injection, 0.1% to 10% of a surfactant, 0.1% to 10% of a phospholipid, 0.1% to 5% of an osmotic pressure regulator, and the balance of water. The baicalein and borneol are combined to prepare an oil-in-water emulsion containing borneol and baicalein, so that the mutual synergistic effect is achieved, the opportunity of the medicine entering the cornea and the inflammatory site of the eye is increased, the medicine is rapidly introduced into the eye tissue, the curative effect is enhanced, the in-eye retention time is obviously prolonged, the corneal permeability of the medicine is increased, the non-invasive drug administration mode treatment for AMD patients and the treatment for various types of eye fatigue are realized.

The invention discloses a platinum nano-enzyme alopecia prevention and treatment agent and application thereof, and belongs to the technical field of biomedical nano-materials, the platinum nano-enzyme alopecia prevention and treatment agent comprises platinum nano-enzyme, and a preparation method of the platinum nano-enzyme comprises the following steps: adding a hydrophilic polymer into a chloroplatinic acid hexahydrate solution, stirring for 10-20 minutes at room temperature, then adding a sodium borohydride solution into the solution, stirring for 10-20 minutes at room temperature, and then adding a sodium borohydride solution into the solution to obtain the platinum nano-enzyme alopecia prevention and treatment agent. Stirring at room temperature for 6 to 20 hours, adding a poor solvent, precipitating, and centrifuging, so as to obtain the platinum nano-enzyme. The method for preparing the platinum nano-enzyme is simple in step and mild in reaction condition, the prepared platinum nano-enzyme has good and stable morphology and uniform particle size, meanwhile, the platinum nano-enzyme further has the activity of multiple antioxidant mimic enzymes including catalase and superoxide dismutase, the content of active oxygen can be effectively reduced, oxidative stress can be relieved, and the platinum nano-enzyme can be used for preparing the antioxidant mimic enzyme. The microenvironment of damaged hair follicles is improved, the hair follicles are repaired, and alopecia is treated.