3451 results about "Sodium alginate" patented technology

The invention provides a special charcoal-based slow-release fertilizer for sandy soil as well as a preparation method and application thereof, and belongs to the technical field of fertilizers. The special charcoal-based slow-release fertilizer for the sandy soil is prepared from amino modified biomass charcoal, urea, urea formaldehyde, monoammonium phosphate, potassium sulfate, polyglutamic acid, fulvic acid, clay, attapulgite, a compound microbial agent and sodium alginate. The compound microbial agent is prepared from halomonas (ACCC 11681), bacillus subtilis (ACCC 60429) and bacillus mucilaginosus (ACCC 10094), and the compound microbial agent is prepared from bacillus subtilis (ACCC 60429) and bacillus mucilaginosus (ACCC 10094). The invention further provides a preparation method and application of the special charcoal-based slow-release fertilizer for the sandy soil. The special charcoal-based slow-release fertilizer for the sandy soil can remarkably improve the water and fertilizer retention capacity of the sandy soil, improve the farmland productivity of the sandy soil, save fertilizer and water input and improve the yield and quality of crops.

The invention discloses bone cement for orthopedic repair and a preparation method thereof, and relates to the technical field of bone cement. The bone cement for orthopedic repair comprises solid-phase powder and a liquid-phase component, the solid-phase powder comprises the following components in parts by weight: 55-65 parts of composite calcium phosphate, 10-15 parts of bioactive glass, 2-3 parts of a developing agent, 1-2 parts of hydroxyapatite, 8-12 parts of a modified toughening agent and 2-3 parts of nano cellulose fibers; the liquid phase component is prepared from the following components in parts by weight: 40 to 50 parts of a sodium alginate solution, 10 to 20 parts of methacrylated gelatin, 0.5 to 1 part of transglutaminase, 30 to 60 parts of a citric acid buffer solution and 1 to 2 parts of an antibacterial agent. The preparation method comprises the following steps: reacting pentaerythritol with 12-oxododecanoic acid to obtain an intermediate 1, and reacting the intermediate 1 with dopamine to prepare the modified toughening agent. The bone cement for orthopedic repair prepared by the invention has good mechanical, self-repairing and antibacterial properties.

The invention discloses a vitamin K2 composite micro-capsule system with stomach protection and intestine slow release functions and a preparation method and application thereof, the vitamin K2 composite micro-capsule system with stomach protection and intestine slow release functions comprises three layers, namely a core layer, a middle layer and an outer layer from inside to outside in sequence; the core layer is formed by coating vitamin K2 with a zein-lac hydrophobic core, the middle layer is a pea protein-pectin electrostatic compound, and the outer layer is sodium alginate and chitosan double-network gel. The micro-capsule system provided by the invention can be tightly combined in a gastric acid environment after being orally taken, the release of active ingredients in the stomach is reduced, and then the micro-capsule system stays at intestinal mucosa for a long time and slowly releases contents, so that the functions of the micro-capsule system are slowly presented outside, the half-life period is prolonged, and the action effect is improved. Vitamin K2 directly or indirectly participates in and regulates various physiological processes related to health, and plays an important role in the aspects of maintaining bone health, preventing cardiovascular diseases, protecting nerves, improving metabolism and the like.

The invention relates to the field of agricultural microbial preparations, in particular to a complex microbial inoculant sustained-release granule for preventing and treating sweet potato stem nematode disease and a preparation method of the complex microbial inoculant sustained-release granule. Comprising the following components in parts by weight: 15-25 parts of paecilomyces lilacinus viable bacterium powder, 10-20 parts of bacillus thuringiensis viable bacterium powder, 10-20 parts of streptomyces viable bacterium powder, 5-15 parts of bacillus subtilis viable bacterium powder, 15-25 parts of charcoal, 5-15 parts of sodium alginate, 5-15 parts of humic acid, 5-10 parts of chitosan, 3-8 parts of calcium silicate, 1-5 parts of mannitol and 1-5 parts of sodium lignin sulfonate. Four microorganisms with complementary functions, namely paecilomyces lilacinus, bacillus thuringiensis, streptomycete and bacillus subtilis, are adopted, the sweet potato stem nematode disease is synergistically controlled through multiple action mechanisms, and the control effect and the stability are remarkably improved.

The invention relates to the technical field of biology, and particularly discloses a recombinant collagen III and application thereof in preparation of gel. The recombinant collagen III is designed by optimizing functional area sequences of human I-type and III-type collagen, the amino acid sequence is shown as SEQ ID No.2, and the recombinant collagen III has the characteristics of high stability, good hydrophilicity and low immunogenicity. The preparation method comprises the steps of expression vector construction, escherichia coli induced expression, affinity chromatography purification and renaturation. The recombinant collagen III can be prepared into a gel dressing and comprises sodium alginate, methylparaben and other components. Experiments show that the gel can effectively promote cell proliferation and has no cytotoxicity; in a mouse skin injury model, the collagen can relieve inflammation, accelerate wound healing and inhibit scar formation, and the effect of the collagen is superior to that of natural human III-type collagen. The invention provides a safe and efficient novel material for wound repair, and is suitable for medical dressings and tissue engineering.

The invention relates to the technical field of environmental restoration, in particular to a slow-release material for synergistically restoring heavy metal and organic compound contaminated soil based on modified biochar and microorganisms and an application method thereof.The slow-release material is prepared from, by weight, 50-80 parts of modified biochar, 30-40 parts of sodium alginate, 10-20 parts of gelatin, 5-10 parts of glycerin and 3-5 parts of calcium carbonate. The multi-modified biochar is prepared from, by weight, 300-400 parts of a functional flora mixed solution and 5-10 parts of mixed nutrient elements of glucose, yeast extract and KHPO, and through the synergistic effect of the multi-modified biochar and the functional flora, efficient immobilization (the immobilization rate gt is 60%) of heavy metal (lead, cadmium and chromium) and efficient degradation (the degradation rate gt is 70%) of organic pollutants (polycyclic aromatic hydrocarbon and petroleum hydrocarbon) are achieved.

The invention discloses latex skeleton aerobic granular sludge and a preparation method thereof, and belongs to the technical field of sewage treatment. The aerobic granular sludge takes a porous natural latex carrier as a core skeleton, anaerobic sludge is fixed on the carrier, and after being mixed and wrapped with a sodium alginate solution, the mixture is dropwise added into a calcium chloride solution to be cured to form gel particles. The preparation method comprises the following steps: crushing the natural latex, screening to obtain particles with the particle size of 0.4-1.2 mm, and soaking the particles in alkali liquor with the pH value of 10-12; the method comprises the following steps: centrifugally concentrating anaerobic sludge to 10000 to 20000 mg / L; mixing the treated latex carrier, anaerobic sludge and a 1%-5% sodium alginate solution according to a volume ratio of 5: (2-5): (2-5); dropwise adding the mixture into a calcium chloride solution with the concentration of 3-7%, and curing to form gel particles; and putting the gel particles into a sewage treatment aerobic tank, injecting domestic sewage, and carrying out aeration domestication for 3-6 days until the particles become earthy yellow. The granular sludge prepared by the invention has the advantages of stable structure, good settling performance and high pollutant removal efficiency.

The invention discloses a rapid restoration method for degraded grassland based on a microbial agent. The microbial agent is formed by compounding 15-30 parts of a nitrogen-fixing microbial agent, 10-20 parts of a phosphate-solubilizing microbial agent, 8-15 parts of a plant growth-promoting microbial agent, 25-40 parts of a humic acid carrier, 3-8 parts of an embedding agent sodium alginate and 5-12 parts of a nutritional agent molasses. Wherein the nitrogen-fixing bacteria are azotobacter chroococcum and alfalfa rhizobium (the viable count is greater than or equal to 5 * 10 < 9 > CFU / g), the phosphate solubilizing bacteria are bacillus megatherium (the viable count is greater than or equal to 1 * 10 < 10 > CFU / g), and the growth-promoting bacteria are bacillus subtilis and pseudomonas fluorescens (the viable count is greater than or equal to 2 * 10 < 10 > CFU / g). The microbial inoculum is subjected to activation, carrier adsorption, sodium alginate embedding granulation and CaCl2 cross-linking processes to be prepared into slow-release particles of 1-3 mm. 200-250 kg of organic fertilizer is applied to each hectare in a mild area, 300-400 kg of organic fertilizer is applied to each hectare in a moderate and severe area, and leymus chinensis and wheatgrass are sown in a mixed mode. After 90 days of application, the vegetation coverage is improved by 40% or above, the soil organic matter is increased by 25-40%, the microbial diversity index is larger than or equal to 3.5, and the comprehensive remediation cost is reduced by 53%.

According to the high-gel-quality minced fillet gel and the preparation method thereof, frozen minced silver carp is unfrozen and then subjected to ice-temperature vacuum dehydration and ultrahigh-pressure homogenization treatment, a myofibrillar protein molecular chain is promoted to stretch through mild shearing force, and a TG enzyme acting site is fully exposed; then chopping and mixing with table salt, starch, TG enzyme coated porous starch-curdlan / sodium alginate oligosaccharide nanosphere dispersion liquid and ice water at low temperature, shielding TG enzyme by nanospheres through a core-shell structure at low temperature so as to avoid advanced activation, and accurately releasing during heating so as to catalyze crosslinking; finally, step-by-step heating gelation is performed, so that the strength and uniformity of minced fillet gel are remarkably improved, the flavor is improved, and the method is suitable for industrial production.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a composite material as well as a preparation method and application thereof. According to the composite material, blended hydrogel of sodium alginate and polyvinyl alcohol is used as a matrix, zeolite molecular sieves, activated charcoal and zero-valent iron particles are embedded into the matrix to form microspheres, sulfate reducing bacteria are immobilized on the surfaces of the microspheres, the composite material is directly added into a mine water anaerobic reactor, the sulfate radical removal rate exceeds 92%, and the sulfate radical removal rate exceeds 92%. Heavy metals such as Cu, Pb and Cr in the mine water can be synchronously precipitated, and the treatment efficiency and stability of the anaerobic system are remarkably improved.

The application relates to an organic-inorganic compound fertilizer containing functional microorganisms and a production method thereof, and relates to the technical field of fertilizers. The fertilizer comprises an inorganic core layer, an organic coating layer and a functional microorganism outer layer. The functional microorganism outer layer comprises the following components in mass fractions: 10-15 parts of compound functional microorganisms, 5-10 parts of synergistic growth-promoting microorganisms, 2-3 parts of trehalose, 1-2 parts of mannitol, 10-15 parts of sodium alginate, 8-10 parts of chitosan, 2-4 parts of yeast extract and 30-40 parts of modified active carbon carriers. The production method comprises the following steps: preparing the inorganic core layer, preheating the inorganic core layer, spraying the organic coating layer material to coat the surface, and obtaining a preliminary product with the organic coating layer; coating the functional microorganism outer layer material on the surface of the organic coating layer of the preliminary product, low-temperature drying and screening, and obtaining the organic-inorganic compound fertilizer containing the functional microorganisms. The application has the effects of improving the slow-release effect of the fertilizer and the survival rate of the microorganisms.

The invention provides a photo-thermal evaporation material based on black titanium dioxide as well as a preparation method and application of the photo-thermal evaporation material. The preparation method comprises the following steps: mixing urea, absolute ethyl alcohol and tetrabutyl titanate into a solution A, mixing absolute ethyl alcohol, ultrapure water and hydrochloric acid into a solution B, dropwise adding the solution B into the solution A, mixing to form a white colloid, heating in a water bath, drying, and calcining in a nitrogen atmosphere to obtain black titanium dioxide powder; the preparation method comprises the following steps: fully mixing a certain amount of black titanium dioxide, sodium alginate and ultrapure water to form a uniform dispersion liquid, dipping the pretreated polyurethane sponge in the dispersion liquid, and crosslinking with a calcium chloride solution to prepare the photo-thermal evaporation material of the black titanium dioxide-calcium alginate composite hydrogel. The photo-thermal evaporation material breaks through the photo-thermal application bottleneck of traditional titanium dioxide, has excellent evaporation rate and seawater desalination performance, and can effectively remove various printing and dyeing wastewater to obtain clean water.

The invention belongs to the technical field of adhesives, and particularly relates to a preparation method of a polysaccharide-based reversible bonding adhesive for constructing a dynamic covalent bond network. The preparation method comprises the following steps: by taking lipoic acid and sodium alginate as reactants and ferric chloride as a cross-linking agent, carrying out cross-linking reaction under a stirring condition to obtain a lipoic acid adhesive, namely the polysaccharide-based reversible bonding adhesive. According to the invention, renewable biomass resources such as sodium alginate, hyaluronic acid, chitosan and the like are used as main raw materials, so that the adhesive is expected to replace a traditional synthetic adhesive depending on a petroleum base, accords with a sustainable development strategy, contributes to reducing consumption of fossil resources, avoids release of toxic substances such as formaldehyde and the like in the synthesis and use processes, and has a good application prospect. And the method is more environment-friendly. The bio-based polysaccharide raw material has good biocompatibility and degradability, and an ideal base material is provided for developing a green and safe biomedical adhesive.

The invention relates to the technical field of food fresh-keeping materials, in particular to a chitosan-curcumin nano-composite fresh-keeping agent and a preparation method thereof.The chitosan-curcumin nano-composite fresh-keeping agent comprises nano-particles of a chitosan-sodium alginate-oxidized sodium alginate interpenetrating network structure, according to the nanoparticles, protonated amino groups of chitosan and carboxyl groups of sodium alginate form a polyelectrolyte compound core, aldehyde groups of oxidized sodium alginate and amino groups of chitosan are subjected to a Schiff base reaction to form a chemical cross-linked network, and zinc ions, amino groups of chitosan, carboxyl groups of sodium alginate and carboxyl groups of oxidized sodium alginate form coordination cross-linking; curcumin and epigallocatechin gallate form a compound through a hydrogen bond and a hydrophobic effect, the compound is embedded in an interpenetrating network structure, beta-diketone groups of curcumin and zinc ions form chelating coordination, a chitosan-sodium alginate-oxidized sodium alginate ternary interpenetrating network is constructed, and the chitosan-sodium alginate-oxidized sodium alginate ternary interpenetrating network structure is formed. The stability is improved by utilizing the synergistic effect of triple mechanisms of electrostatic interaction, Schiff base chemical bonds and zinc ion coordination.

The invention relates to the technical field of biological medicine, and particularly discloses an atopic dermatitis treatment medicine and a preparation method and application thereof.The preparation method comprises the steps that sodium alginate, sodium polyacrylate and water are mixed and then subjected to a swelling reaction, and a colloidal solution with the viscosity larger than or equal to 5000 cP is formed; mixing upatinib, a preservative, glycerol and azone to obtain a raw material phase; and mixing the colloidal solution with the raw materials, and homogenizing to obtain the atopic dermatitis treatment medicine. Through swelling reaction of sodium alginate and sodium polyacrylate, the viscosity of a colloidal solution is remarkably improved through molecular chain entanglement, charge repulsion and water absorption synergistic effects of sodium alginate and sodium polyacrylate; through compounding of all the components, the transdermal efficiency of the medicine is improved, the irritation of the medicine is reduced, and meanwhile, the inhibition efficiency on atopic dermatitis inflammatory factors is also improved.

The invention relates to an adsorbent and a preparation method and application thereof, the adsorbent comprises a polymer matrix and a nanofiller uniformly embedded in the polymer matrix, the polymer matrix comprises a calcium / boron cross-linked polyvinyl alcohol-sodium alginate blend, and the nanofiller is sulfonic acid / carboxylic acid functionalized graphene oxide; the mass fraction of the nano filler in the adsorbent is 0.05%-0.60%; wrinkles and irregular hole structures are distributed on the surface of the adsorbent. The adsorbent is used for removing tritium in water and is high in adsorption capacity, stable in structure and good in recycling performance. The removal rate of tritium in the single-stage adsorption process is greater than 8.5%, and the removal rate of tritium in the third-stage adsorption process is 19.4-57.7%.

A preparation method of a bacteriostatic and antioxidant zein / hyaluronic acid degradable preservative film relates to the field of foods.The method comprises the steps that a zein-hyaluronic acid solution and a citrus polyphenol solution are mixed, distilled water is dropwise added, vacuum concentration is performed, the mixture is mixed with a laminarin solution, auxiliary materials are added, uniform mixing, bubble removing and film preparing are performed, and the preservative film is obtained. After drying, obtaining a zein-HA film of laminarin and citrus polyphenol; or mixing the zein-hyaluronic acid solution with the moringa oleifera leaf extract powder, dropwise adding distilled water, concentrating under reduced pressure, mixing with the laminarin solution, adding the sodium alginate solution and auxiliary materials, defoaming, pouring to form a film, and drying to obtain the zein-HA film of the laminarin and the moringa oleifera leaf extract. The synergistic effect among the substances of the protein film can effectively improve the fresh-keeping effect of the composite film, and the release property of the composite film can further improve the fresh-keeping effect on fresh-cut food.

The invention relates to the technical field of soil remediation, in particular to a biochar-humic acid-calcium alginic acid composite saline-alkali soil modifier and a preparation and application method thereof. The modifier adopts a multi-layer structure design: biochar is pre-adsorbed by calcium chloride, compounded with sodium humate, and then crosslinked with sodium alginate to form a gel to form a composite inner core; secondly, sulfobetaine methacrylate and vinyl phosphonic acid are introduced into a sodium alginate molecular chain through graft polymerization, and modified sodium alginate is obtained to serve as an outer layer coating material; and finally, dipping the composite inner core into the outer layer solution, and carrying out graded recalcification by calcium chloride and short-time treatment by sodium sulfate to obtain a final product. Through the synergistic effect of calcium ion slow release of the inner core and zwitterionic characteristics of the outer layer, efficient replacement and long-term stable regulation and control of soil sodium ions are achieved, the pH value, the conductivity and the alkalization degree of soil are remarkably reduced, the water holding capacity is effectively improved, and the soil conditioner is suitable for sustainable improvement of moderate and severe saline-alkali soil.

The invention discloses a normal-temperature bacteria liquid enteric-coated targeted colonization microcapsule and a preparation method thereof. The invention belongs to the technical field of biological medicine. The structure of the room-temperature bacterial liquid protection microcapsule is as follows: an inner layer is an activity maintaining layer and mainly consists of a sodium alginate-calcium chloride polyelectrolyte compound (the thickness is 50-100 microns); the middle layer is a pH response release layer and is mainly composed of hydroxypropyl methyl cellulose phthalate (HPMCP, dissolved at pH of 6.8 or above) and nano calcium carbonate particles (the particle size is 50nm, and the proportion is 10% w / w); the outer layer is a mucous membrane adhesion layer, and the main components of the mucous membrane adhesion layer comprise fucose modified chitosan (Fuc-CS, targeted colonic mucous membrane lectin protein) and carbomer 940 (pH sensitive adhesion polymer); the method is a microcapsule capable of preserving the bacterial liquid at normal temperature and accurately targeting colon release and adhesion colonization and a process thereof, the problem of flora activity loss caused by a freeze-drying process can be solved, in addition, the process does not need freeze-drying equipment, and the production cost is reduced.

The invention relates to the field of fermentation compounds, in particular to a compound for promoting GLP-1 secretion, a fermentation preparation method and application of the compound. According to the compound, fermented mulberry leaf powder is used as a main material, soybean oligosaccharide and rhizoma kaempferiae rhizome extract are used as synergistic materials, white birch juice concentrate and white kidney bean extract are used as auxiliary materials, the mulberry leaf powder is subjected to compound probiotic fermentation and multi-stage directional enzymolysis to enrich active components, and meanwhile, the soybean oligosaccharide is extracted and purified by adopting ultrasonic-assisted extraction in combination with a gradient alcohol precipitation method. Supercritical CO2 extraction is assisted to obtain a high-purity rhizoma kaempferiae rhizome active extract; finally, all the extracts are compounded in proportion and embedded through sodium alginate-chitosan wall material microcapsules, and the stability is improved with the assistance of a vitrification carrier and an antioxidant; the composition provided by the invention has a multi-target synergistic effect, and can significantly promote the secretion of GLP-1.

The invention discloses a multi-hydrogen bond enhanced fluorine-containing core-shell water-based binder as well as a preparation method and application thereof, and relates to the technical field of lithium ion silicon-based negative electrode binders. The preparation method comprises the following steps: dissolving methyl methacrylate, acrylonitrile and an emulsifier in water, carrying out a polymerization reaction to obtain a rigid core emulsion, adding acrylic acid long-chain ester, a fluorine-containing monomer and acrylamide, carrying out a mixing reaction to obtain a core-shell structure emulsion, mixing the core-shell structure emulsion with a sodium alginate solution, adding nano SiO2, and carrying out a polymerization reaction to obtain the high-temperature-resistant water-based acrylic emulsion. And after the reaction is finished, obtaining the multi-hydrogen bond enhanced fluorine-containing core-shell water-based adhesive. Through core-shell structure design and introduction of a multiple hydrogen bond network, the problem of bonding caused by volume expansion of the silicon negative electrode material in the charging and discharging process is successfully solved, the cycle life and stability of the battery are remarkably prolonged, meanwhile, the environment-friendly characteristic and the process simplicity are considered, and the preparation method is simple and convenient. And an efficient and sustainable development solution is provided for the field of lithium ion batteries.

The invention belongs to the field of medical instrument coloring agents, and provides a natural anthocyanin endoscope coloring agent. According to the invention, the innovative design of combining a ternary color-stabilizing compound formed by anthocyanin, a co-chromophore and hydroxypropyl beta cyclodextrin with a chitosan sodium alginate polysaccharide system and a composite buffer system is adopted, and the viscosity is controlled to be 200-320 millisecond, the particle size of spray droplets is 40-60 microns, and the thickness of a thin film is 10-30 microns through specific molar ratio compatibility and a genipin crosslinking technology. Through accurate regulation and control, the excellent performance that a double-network thin layer is formed under the calcium ion environment that the absorbance retention rate at 520 nanometers is not lower than 90% and the elution rate is not lower than 90% under the irradiation of hundred thousand lux white light is achieved, the technical problems that a traditional endoscope coloring agent is poor in safety, low in stability and insufficient in mucous membrane contrast ratio are solved, and the wide clinical application value is achieved.

The invention relates to the technical field of polyurethane impermeable materials, and particularly discloses a high-molecular impermeable material with oil resistance and impermeability as well as a preparation method and application thereof, and the high-molecular impermeable material comprises the following components in parts by weight: 120 parts of a polyurethane prepolymer, 20-45 parts of a diluent, 10-30 parts of an auxiliary agent, 15-20 parts of a micro-powder filler, 10-15 parts of carboxymethyl cellulose and 3-8 parts of dibasic hydrogen phosphate; wherein the polyurethane prepolymer is prepared from a diisocyanate compound and polyether polyol through a reaction; wherein the micro powder filler is a mixture of sodium acrylate hydrogel micro powder and sodium alginate hydrogel micro powder; wherein the dibasic hydrogen phosphate is monovalent ion salt. The high-molecular anti-seepage material has excellent anti-seepage performance in an oil storage environment, has relatively high adhesive force, and can be suitable for grouting in a humid environment; and water resistance and oil resistance of an underground water-sealed stone cavern oil depot environment can be better realized.

The invention discloses a hydrogel-based water-energy-resource co-production solar evaporator and application thereof, and belongs to the technical field of chemistry and environment, the hydrogel-based water-energy-resource co-production solar evaporator is prepared by taking sodium alginate hydrogel as a matrix, adding carbon nanotubes and a titanium-based lithium ion sieve or a metal-doped titanium-based lithium ion sieve into a solution of the sodium alginate hydrogel, taking polyurethane sponge as a carrier frame, and preparing the hydrogel-based water-energy-resource co-production solar evaporator. Ca2 + is adopted as a cross-linking agent to construct a solar evaporator with a flexible size (centimeter-level to meter-level components can be prepared according to application scenes), the solar evaporator is used for the solar driven evaporation process of lithium-containing water resources such as salt lake seawater, and Li + selective enrichment, fresh water collection and waste heat power generation are synchronously achieved. Moreover, the evaporator has the characteristics of simple preparation process, low cost and excellent environmental compatibility, also has a good removal effect on salt ions, and keeps stable fresh water collection performance in a long-time operation process.

The invention relates to a composite hydroxypropyl methylcellulose skeleton sustained-release material and a preparation method thereof, and belongs to the technical field of drug sustained release. The sustained-release material is prepared from 70 to 90 parts of hydroxypropyl methylcellulose (HPMC), 10 to 20 parts of sodium alginate, 8 to 15 parts of chitosan, 0.1 to 0.2 part of Omega-3 fatty acid, 0.05 to 0.06 part of vitamin D, 2.5 to 5 parts of soluble calcium salt-zinc salt composite cross-linking agent, 0.5 to 1.5 parts of hydrolyzable cross-linking agent, 3 to 10 parts of enzyme sensitive auxiliary material, 1 to 5 parts of pore-foaming agent and 2 to 8 parts of hydrophobic blocking agent. The preparation method comprises the steps of raw material pretreatment and dry mixing, active component dispersion liquid preparation, wet granulation and primary cross-linking, secondary cross-linking and drying, vacuum drying and size stabilization, curing and packaging and the like. The sustained-release material provided by the invention has the advantages of controllable drug release rate, good mechanical strength and biodegradability, is suitable for sustained-release delivery of Omega-3 fatty acid, vitamin D and other active components, and can improve the bioavailability and stability of drugs.

The invention belongs to the technical field of deep eutectic gel wave-absorbing materials, and particularly relates to a preparation method of sodium alginate modified deep eutectic gel with wave-absorbing and strain-sensing functions, which comprises the following steps: mixing sodium alginate with deionized water, mechanically stirring for the first time to form gel A, adding a certain amount of acrylamide, mechanically stirring for the second time to form gel B, and stirring for the second time to form gel B; adding a certain amount of deep eutectic solution, mechanically stirring for the third time, performing ultrasonic vibration, vacuumizing to form gel C, and finally performing ultraviolet curing treatment on the gel C to obtain sodium alginate modified deep eutectic gel; according to the preparation method, complex equipment is not needed, the preparation period is short, the sodium alginate modified deep eutectic gel is added into deep eutectic solutions with different contents, the real part and imaginary part of the dielectric constant of the material are accurately controlled, the characteristic impedance is close to the free space impedance, meanwhile, the ion conduction efficiency is guaranteed, and optimization of wave absorption and sensing is achieved.

The invention provides a wormwood planting fertilizer and application thereof, and belongs to the technical field of agricultural planting. The wormwood planting fertilizer is prepared from the following components in parts by weight: 10 to 15 parts of humic acid, 5 to 8 parts of amino acid, 2 to 3 parts of wormwood extract A, 3 to 5 parts of wormwood extract B, 15 to 20 parts of nitrogen-phosphorus-potassium compound fertilizer, 0.01 to 0.03 part of sodium selenite, 0.02 to 0.05 part of zinc sulfate, 0.3 to 0.5 part of cellulose nanocrystal, 0.01 to 0.03 part of malic acid and 0.1 to 0.2 part of sodium alginate. By means of the two-dimensional design that components synergistically enhance absorption and the planting process is matched with the growth rhythm, the problems that in traditional fertilization, nutrients are unbalanced, the selenium and zinc utilization rate is low, and pest and disease damage prevention and control are difficult are solved, efficient absorption of wormwood on microelements, accurate supply of nutrients and reduction of the pesticide use amount are achieved, and the yield of the wormwood is increased. The yield and the medicinal quality are synergistically improved.

The invention discloses bioactive macroporous hydrogel as well as a preparation method and application thereof. The bioactive macroporous hydrogel comprises hydrogel particles and a bioactive load loaded on the hydrogel particles, the hydrogel particles are obtained by mechanically extruding a hydrogel matrix, and the hydrogel matrix is formed by compounding sodium alginate, agarose and methacrylated hyaluronic acid through hydrogen bond crosslinking and photo-crosslinking; the bioactive load comprises: a) small extracellular vesicles of which the surfaces are modified with macrophage targeted CRV peptides; and b) a PLGA (poly (lactic-co-glycolic acid)) microsphere loaded with a cartilage inducer Kartogenin. The bioactive macroporous hydrogel disclosed by the invention has an internally communicated macroporous network, is beneficial to cell infiltration, blood vessel ingrowth and nutrient substance diffusion, and overcomes the defects that the traditional hydrogel is small in pore size and limits cell behaviors. According to the bioactive macroporous hydrogel disclosed by the invention, dual bioactive loads are adopted to synergistically promote tendon-bone healing, so that the treatment effect is better.

The invention relates to the technical field of agriculture, provides a red soil hardening reduction conditioner based on modified straw adsorption carbon as well as a preparation method and application thereof, and solves the problems that an existing red soil hardening conditioner is poor in soil improvement effect and does not have a slow release function. Comprising the following steps: (1) preparing oyster shell-biochar composite powder; (2) loading functional components; (3) directional immobilization of microorganisms; (4) coating a slow-release layer; (5) activating treatment; the red soil hardening reduction conditioner is prepared from the following raw materials in parts by weight: 80 to 100 parts of oyster shell powder, 100 to 200 parts of modified straw adsorption carbon, 10 to 30 parts of rice hull powder, 30 to 50 parts of nano dihydrate gypsum, 100 to 200 parts of a polyglutamic acid solution, 10 to 50 parts of acid-resistant bacillus, 15 to 30 parts of sodium alginate, 30 to 60 parts of humic acid, 10 to 30 parts of carbide slag and 30 to 60 parts of attapulgite.

The invention provides a wound dressing for diminishing inflammation, easing pain and promoting wound healing and a preparation method thereof. The wound dressing capable of diminishing inflammation, easing pain and promoting wound healing is prepared from the following components in parts by mass: 6 to 10 parts of oxidized sodium alginate, 7 to 9 parts of hydrazide gelatin, 1 to 1.5 parts of tannic acid, 8 to 12 parts of polyethylene glycol, 0.05 to 0.1 part of cannabidiol, 0.05 to 0.1 part of neomycin sulfate, 0.2 to 0.3 part of 2-roots alcohol, 0.02 to 0.04 part of vitamin C palmitate and 0.03 to 0.1 part of epsilon-polylysine. The dressing can achieve excellent effects of diminishing inflammation, easing pain and promoting wound healing through synergistic cooperation of all the components.