44 results about "Lentinan" patented technology

The invention provides an influenza vaccine adjuvant based on lentinan as well as a preparation method and application thereof. The active ingredient of the vaccine adjuvant is lentinan, the lentinan is extracted from fresh lentinus edodes through a water extraction and alcohol precipitation method, no additional chemical modification is needed, the vaccine adjuvant can be used for preparing the influenza virus vaccine, and the influenza virus vaccine at least contains one of three inactivated influenza virus antigens, namely H1N1 A, H3N2 A and Victoria B. The invention also provides a vaccine preparation and a preparation method thereof, the vaccine preparation comprises the vaccine adjuvant and an influenza virus vaccine, the content of lentinan in the vaccine preparation is 4 mg / mL, and the vaccine preparation has an immunological enhancement effect.

The invention discloses an insect antibacterial peptide nutrient solution as well as a preparation method and application thereof, and belongs to the technical field of biology. Insect protein (fly maggot powder / hermetia illucens) and plant fiber (bran) are subjected to enzymolysis and then subjected to a pH gradient chelation process (5.0-7.0-8.5), metal ions (Fe < 2 + > / Mn < 2 + > / Zn < 2 + >) are added in stages for chelation, the chelation degree is larger than or equal to 91.4%, lentinan and alginate oligosaccharide are added for synergistic interaction, and finally the insect antibacterial peptide nutrient solution is obtained. Experiments prove that after the insect antibacterial peptide nutrient solution prepared by the invention is used for carrying out root irrigation treatment on plants, tomato yellow leaf curl virus or tomato spotted wilt virus can be remarkably prevented and treated, and the insect antibacterial peptide nutrient solution has high efficiency and persistence and conforms to the development direction of green plant protection.

The invention discloses a porcine circovirus type 2 and haemophilus parasuis bivalent inactivated vaccine and a preparation method thereof. According to the invention, a porcine circovirus strain, a haemophilus parasuis serum type 4 strain and a haemophilus parasuis serum type 5 strain which are epidemic in situ are respectively separated and obtained, and the microbial preservation numbers of the porcine circovirus strain, the haemophilus parasuis serum type 4 strain and the haemophilus parasuis serum type 5 strain are respectively CGMCC (China General Microbiological Culture Collection Center) No.47094, CGMCC No.46698 and The separated strain or bacterial strain is prepared into a bivalent inactivated vaccine, and lentinan is added in the vaccine preparation process to enhance the immune effect; a safety evaluation result shows that local or whole-body adverse reaction caused by the bivalent vaccine does not occur, so that the safety of the bivalent vaccine is good; the immune efficacy evaluation result of the bivalent vaccine shows that the bivalent vaccine can provide complete protection for animals aiming at the in-situ epidemic porcine circovirus, haemophilus parasuis serotype 4 and haemophilus parasuis serotype 5, and has good immune protection efficacy.

The invention provides lactobacillus delbrueckii subsp. Bulgaricus LB047 and application thereof in promoting calcium absorption and enhancing immunity, and belongs to the technical field of microorganisms. The invention provides lactobacillus delbrueckii subsp. Bulgaricus LB047, and the preservation number of the lactobacillus delbrueckii subsp. Bulgaricus LB047 is CGMCC No.30725. The invention further provides a preparation method for preparing mushroom peptide fermentation liquor by utilizing the lactobacillus delbrueckii subsp. Bulgaricus LB047, and application of the prepared mushroom peptide fermentation liquor in promoting calcium absorption and enhancing immunity.

This invention discloses a compound traditional Chinese medicine powder inhaler for respiratory tract infections and its preparation method, relating to the field of pharmaceutical formulation technology. The compound traditional Chinese medicine powder inhaler for respiratory tract infections is composed of polysaccharide composite gel microspheres, forsythia, scutellaria, honeysuckle, and isatis root. The polysaccharide composite gel microspheres are composed of seaweed sulfated polysaccharide, lentinan, calcium chloride, and curcumin. Seaweed sulfated polysaccharide, lentinan, curcumin, and calcium chloride cross-link to form a three-dimensional network spherical structure, improving the particle morphology and flowability of the micropowder. Furthermore, due to its good hygroscopic and moisturizing properties, it competitively reduces the moisture absorption of the micropowder, preventing aggregation and further improving flowability. In addition, the gel microspheres have excellent adhesion, adhering to the infection site after entering the respiratory tract, reducing expulsion losses due to respiration, maintaining an effective drug concentration at the infection site, and improving therapeutic efficacy.

The invention relates to application of lentinan in preparation of a medicine for enhancing Kukuzhou cell immune function, and belongs to the technical field of immunopharmacology. The invention discloses a mechanism and application of lentinan LNT (Lentinan) based on a TLR2 (Toll-Liver Receptor 2) signal channel for enhancing the immune function of liver cumness cells and promoting lysosome maturation. By constructing an LNT fluorescence labeling system, a Kuptake cell in-vivo tracing model and a TLR2 function intervention model, it is proved that LNT can be directly combined with TLR2 and activate a TLR2 / MyD88 / NF-kappa B signal axis, and therefore the phagocytosis and immune response capacity of Kuptake cells is enhanced. Meanwhile, TLR2 signal-induced reactive oxygen species (ROS) up-regulation can promote TFEB dephosphorylation and nuclear translocation, lysosome maturation is driven, and degradation metabolism of LNT is accelerated. The invention provides a TLR2-based immune enhancement mechanism of the LNT, and provides a theoretical basis and an application basis for developing immunomodulatory targeted drugs.

This invention provides a drug for antagonizing bacterial endotoxins, its preparation method, and its application, belonging to the biomedical field. The composition consists of 25-55 parts of dried powdered traditional Chinese medicine extract, 25-70 parts of mixed essential oil powder, and 40-90 parts of lentinan powder. The traditional Chinese medicine extract is prepared by decoction of Scutellaria baicalensis, Lonicera japonica, Forsythia suspensa, and Isatis indigotica under reduced pressure at low temperature and spray drying. The mixed essential oil powder is prepared by encapsulating peppermint oil and eucalyptus oil with gelatin and hydroxypropyl cellulose and then spray drying under high pressure. This invention, through specific formulation and processing, significantly enhances the synergistic antagonistic effect of each component against endotoxins. Experiments show that this composition exhibits antagonistic activity far superior to ibuprofen in vitro; in vivo, it significantly reduces the endotoxin content in the plasma of 817 broiler chickens, rapidly alleviates LPS-induced fever and diarrhea, and improves decreased growth performance. Therefore, this invention is of great significance for reducing antibiotic dependence and improving the efficiency of livestock and poultry farming.

The application provides a lactobacillus delbrueckii subsp bulgaricus LB047 and application thereof in promoting calcium absorption and enhancing immunity, and belongs to the technical field of microorganisms.The application provides the lactobacillus delbrueckii subsp bulgaricus LB047, and the preservation number is CGMCC No.30725.The application further provides a preparation method of a lentinan peptide fermentation liquor prepared by using the lactobacillus delbrueckii subsp bulgaricus LB047, and application of the prepared lentinan peptide fermentation liquor in promoting calcium absorption and enhancing immunity.

The invention provides a method for improving tobacco leaf quality in a tobacco leaf mature period, which comprises the following steps: (1) topping in a tobacco plant squaring period, smearing a regulation and control liquid on main veins of upper tobacco leaves 2-3 days after topping, and smearing a regulation and control liquid on one end, close to stalks, of main veins of lower tobacco leaves, the regulation and control liquid at least comprising ferulic acid with the concentration of 10-30 ppm; (2) after the regulation and control liquid is smeared, promoting liquid is sprayed to the whole tobacco plant 2-3 days later, and the promoting liquid is composed of soybean peptides, algal polysaccharides and lentinan. By regulating and controlling the content of chlorogenic acid in the mature period of the tobacco leaves, the irritation of the tobacco leaves to sense organs is reduced, and therefore the quality of the tobacco leaves is improved.

The invention relates to lentinan as well as a preparation method and application thereof, monosaccharide of the lentinan comprises glucose, galactose, mannose, fucose and glucosamine, and the molar ratio of the glucose to the galactose to the mannose to the fucose to the glucosamine is (85.0 to 88.0) to (5.5 to 6.5) to (3.5 to 4.1) to (1.8 to 2.2) to (1.0 to 1.2). According to the preparation method disclosed by the invention, a composite filler consisting of AB-8 macroporous resin and acidic aluminum oxide is adopted, static adsorption decoloration is carried out when the optimal mass ratio is 2: 3, an extraction process of combining graded hot water extraction with negative pressure concentration is optimized, and on the premise of avoiding using an organic solvent, efficient purification of lentinan is realized, so that the retention rate of the lentinan reaches 22.38%, and the yield of the lentinan is improved. And the beta-triple helix active structure can be well reserved.

The application discloses a bacillus zoogleoides BZ-32 and application of metabolites of the bacillus zoogleoides BZ-32 in vegetable stress resistance, and an effective component of the application is composed of bacillus zoogleoides fermentation liquor or metabolites, choline chloride and lentinan, wherein the weight percentage of the bacillus zoogleoides, choline chloride and lentinan is respectively 5-30% of bacillus zoogleoides metabolites, 5-30% of choline chloride and 0.2-5.0% of lentinan. The plant stress resistance composition can prevent and treat diseases such as root rot, anthracnose and powdery mildew of vegetables, and can prevent stress caused by excessively low temperature in winter and spring frost, and improve disease resistance and stress resistance of crops. The application can also be used for preventing and treating various corn diseases and strawberry diseases, and promoting growth and improving stress resistance.

The invention relates to the technical field of seed treatment, and particularly discloses a seed treatment suspending agent containing prothioconazole, fludioxonil and chlorantraniliprole and a preparation method of the seed treatment suspending agent. The invention discloses a seed treatment suspending agent containing prothioconazole, fludioxonil and chlorantraniliprole. The suspending agent is prepared from the following raw material components in percentage by mass: 5 to 10 percent of prothioconazole microcapsules, 1 to 5 percent of silicon carrier loaded fludioxonil, 1 to 3 percent of chlorantraniliprole, 0.3 to 0.7 percent of lentinan, 0.3 to 0.7 percent of humic acid, 0.3 to 0.7 percent of chelated zinc, 10 to 15 percent of ethylene glycol, 3 to 5 percent of filler, 0.5 to 1.5 percent of dispersing agent, 0.05 to 0.15 percent of thickening agent, 2 to 3 percent of film-forming agent, 10 to 15 percent of oil and the balance of deionized water. The suspending agent disclosed by the invention not only has a relatively good prevention and treatment effect on wheat root rot, but also has a relatively high germination rate of treated wheat seeds.

The invention relates to the technical field of biological medicines, in particular to an injection for treating AIDS and a preparation method thereof. The extraction method of the sulfate algae polysaccharide comprises the following steps: mixing seaweed meal, cellulase and water, carrying out enzymolysis, and extracting for 10-12 hours to obtain an extract; filtering, adding magnesium chloride hexahydrate into filtrate, standing for 20-30 minutes, centrifuging, taking supernatant, removing impurities, adding absolute ethyl alcohol until the final concentration is 55-65%, and precipitating polysaccharide; and purifying the precipitated crude polysaccharide, and freeze-drying to obtain the sulfate algae polysaccharide. The purity of the sulfate algae polysaccharide is greater than or equal to 95%, and the sulfate algae polysaccharide is cooperated with lentinan to obtain a safe and stable injection with an excellent treatment effect on AIDS (Acquired Immune Deficiency Syndrome). And a new scheme is provided for treatment of AIDS.

The invention discloses a fertilizer for improving waterlogging tolerance of plants and application of the fertilizer, and belongs to the technical field of agricultural fertilizers. Comprising the following components in parts by weight: 20-40 parts of ground phosphate rock, 20-30 parts of oyster shell powder, 20-30 parts of urea, 15-20 parts of potassium chloride, 10-20 parts of illite powder and 8-12 parts of lentinan. The phosphorite powder, the oyster shell powder, the potassium chloride, the illite powder and the lentinan are compounded for the first time, and a'mineral nutrition regulation-soil physical improvement-plant immune activation 'three-in-one synergistic anti-waterlogging technical system is constructed. All the components complement each other and have synergistic interaction, and the anti-waterlogging effect is far better than that of a single component or conventional fertilizer. The functional anti-waterlogging fertilizer fills the technical blank of functional anti-waterlogging fertilizers, provides an innovative solution for stress resistance and stable yield of crops with the comprehensive advantages of low cost, high efficiency and environmental protection, and has remarkable economic benefits and social benefits.

The invention discloses a botanical antiviral agricultural composition and application thereof, and belongs to the field of pesticides. The invention provides a botanical antiviral agricultural composition, the effective components of which are formed by binary compounding of sterol and lentinan, and the mass ratio of the sterol to the lentinan is (1: 5)-(1: 160). The composition provided by the invention shows a synergistic interaction effect on the tomato yellow leaf curl virus (TYLCV) in a specific ratio range.

This invention discloses a brewed vinegar rich in lentinan and its preparation method. Using the lentinan variety "Shenxiang 1513" as raw material, the invention obtains a lentinan extract through water extraction and concentration, wherein the lentinan content is ≥0.5%. The obtained lentinan extract is then compounded with solid-state fermented vinegar at a mass ratio of 1:50-100, aged at 20-30℃ for 15-30 days, and then filtered and sterilized to obtain the finished product. The lentinan vinegar prepared by this invention does not contain any preservatives, umami agents, or sweeteners. The final product contains lentinan ≥50 mg / 100 mL, total acid ≥5.00 g / 100 mL, exhibits a harmonious flavor, stable quality, and clearly defined functional components and excellent flavoring properties.

This invention belongs to the field of pharmaceutical formulation, drug delivery, and vaccine technology, and relates to a method for preparing alkylated lentinan and its application in lipid nanoparticle (LNP) vaccines. This invention modifies lentinan by alkylation, enabling it to dissolve efficiently in lipid nanoparticles (LNPs), making it suitable for the preparation of LNP mRNA vaccines. Using the alkylated lentinan of this invention to prepare mRNA vaccines allows for the co-loading / assembly of alkylated lentinan and mRNA into the same lipid nanoparticle delivery system, creating an integrated antigen and adjuvant vaccine system. This solves the problems in existing technologies, significantly enhances the strength and breadth of anti-tumor immune responses, and features high safety, efficient immune activation, and strong targeting, making it widely applicable for tumor prevention and treatment.

The invention provides lentinan as well as a preparation method and application thereof, and belongs to the technical field of plant protection. According to the preparation method, a ZTC 1 + 1 II type clarifying agent is used, and step-by-step flocculation purification is carried out at 50 DEG C according to a sequence of firstly adding a component B and then adding a component A and specific stirring parameters. According to the process, impurities such as protein are efficiently removed, the active conformation of lentinan is well reserved, and the antiviral activity of the product is remarkably improved. Meanwhile, the invention finds that when the lentinan obtained by the invention is mixed with oligosaccharin.chain protein in a mass ratio of 7: 3 or 9: 1, the lentinan shows a remarkable specific synergistic effect. The invention solves the problems of poor product stability and large activity loss in the prior art, and is especially suitable for prevention and treatment of plant virus diseases such as tomato mosaic virus diseases.

The invention belongs to the technical field of pharmaceutical preparations, drug delivery and vaccines, and relates to a preparation method of alkylated lentinan and application of the alkylated lentinan in LNP vaccines. The lentinan is subjected to alkylation modification, so that the lentinan can be efficiently dissolved in LNP, and the preparation method is suitable for preparing the LNP mRNA vaccine. When the alkylated lentinan is used for preparing the mRNA vaccine, the alkylated lentinan and mRNA can be synergistically loaded / assembled in the same lipid nano delivery system to prepare an antigen and adjuvant integrated vaccine system, so that the problems in the prior art are solved, the strength and breadth of anti-tumor immune response are remarkably improved, and the method has the advantages of high safety, low cost and the like. The polypeptide has the characteristics of efficient immune activation and strong targeting, and can be widely applied to tumor prevention / treatment.

The invention relates to the technical field of biomedical engineering, in particular to Pickering emulsion as well as a preparation method and application thereof. According to the invention, lentinan is selected as an immune agonist and is combined with PLGA, so that the immunocompetence of PLGA as an adjuvant is enhanced; the PLGA-coated lentinan can prevent the antigen from being directly exposed in an organic solvent to influence the activity of the antigen; compared with PLGA nanoparticles, the Pickering emulsion has a larger specific surface area and can adsorb more antigens; the Pickering emulsion has good fluidity and can increase the interaction between the PLGA nanoparticles and cell membranes, when the PLGA nanoparticles are in contact with antigen presenting cells (APCs), a large number of antigens are absorbed by the APCs, and the activated APCs can carry a large number of nanoparticles to enter lymph nodes, so that the Pickering emulsion has good lymph node targeting property. Upon uptake of a large number of antigens, the immune cells induce strong cellular or humoral immune responses in various ways.

The application discloses a kind of biological source pesticides for preventing and treating aigan's root rot, it includes one or more than two combinations of berberine, ningnanmycin, Sophora flavescens extract, zhongshengmycin, allicin, polyoxin, matrine, osthol, lentinan.The application takes aigan's root and rhizome infected with root rot as research object, obtains a strain of pathogenic bacteria from disease-healthy boundary by separation, purification and pathogenicity determination, and is identified as bean shell ball spores by morphological observation, rDNA-ITS sequence analysis Macrophomina phaseolina Comprehensive indoor and field screening results, the most effective pesticide screened includes 3% zhongshengmycin, 0.5% berberine, 3.5% Sophora flavescens extract and 8% ningnanmycin, and all does not show plant adverse effect and phytotoxicity to aigan growth.Especially, it can significantly reduce malondialdehyde level, while increasing the activity of superoxide dismutase, catalase and peroxidase, so as to improve the disease resistance of aigan.

The invention discloses a method for enhancing lentinan extraction through natural sour juice, and belongs to the field of polysaccharide extraction. The method comprises the following steps: taking natural sour juice as an extraction solvent, extracting lentinan through mechanochemistry assistance, recovering the lentinan through an alcohol precipitation method, and purifying the lentinan through a sevag method. According to the method, lentinan is extracted through natural sour juice, the yield and antioxidant activity of the lentinan are higher than those of a traditional water extraction method, the lentinan is more environmentally friendly, and meanwhile reutilization of sour juice by-products in the fruit juice processing process is achieved.

The present application relates to the technical field of pharmaceutical compositions, and discloses a kind of pharmaceutical compositions for improving immunity and preparation method thereof, comprising: echinacea extract, lactoferrin peptide, seleniumized carrageenan, yeast beta-glucan, glutathione, lentinan, natural cordyceps militaris fruit body powder, fructooligosaccharide or galactooligosaccharide, vitamin D3, zinc citric acid, pretreatment, mixing, intermittent ultrasonic dispersion, low-temperature forming and spray drying are made into, wherein with the amount of echinacea extension, other synergistic components are adjusted in proportion, maintain the balance of immune activation-antioxidation-mucosa protection.The pharmaceutical composition disclosed in the present application is flexible in dosage, has synergistic effect of multiple components, has significant immunoregulatory effect, is high in safety and stable in process.

The invention discloses a preparation method and application of mushroom soluble dietary fiber combined phenol. Comprising the following steps: sieving shiitake mushrooms, and dissolving the sieved shiitake mushrooms in water; adding high-temperature-resistant alpha-amylase to carry out amylase reaction; after the amylase reaction is finished, protease is added for a protease reaction; after the protease reaction is finished, adding saccharifying enzyme to carry out saccharifying enzyme reaction; and after the saccharifying enzyme reaction is finished, centrifuging to take a supernatant, precipitating the supernatant in an ethanol solution, centrifuging to take a precipitate, and sequentially washing and freeze-drying the precipitate to obtain the shiitake mushroom soluble dietary fiber bound phenol. Animal experiments prove that the shiitake mushroom soluble dietary fiber combined phenol has a remarkable effect of relieving colitis, is derived from medicinal and edible shiitake mushrooms, is simple and convenient in process and easy to industrialize, realizes high-value utilization of shiitake mushroom resources, and can be used for preparing functional foods, health-care foods or biological medicine products for adjuvant therapy for relieving colitis.

This invention belongs to the field of modified protein technology, and provides a shiitake mushroom protein crude extract-β-glucan complex and its application. The shiitake mushroom variety includes Shenxiang 1513, and the origin of Shenxiang 1513 includes Hubei or Zhejiang. The β-glucan includes at least one of barley β-glucan, oat β-glucan, and yeast β-glucan. This invention found that, compared with shiitake mushroom protein crude extract alone, the shiitake mushroom protein crude extract-β-glucan complex significantly increased the production of short-chain fatty acids and promoted the proliferation of beneficial bacteria. Simultaneously, this invention, through microbiome and metabolomics analysis, identified Bacillus phylum as a key positive regulator and confirmed its association with the upregulation of metabolic pathways such as purines, lipids, bile acids, and amino acids. These findings indicate that the shiitake mushroom protein crude extract-β-glucan complex of this invention has superior prebiotic potential, providing a theoretical basis for the development of functional food ingredients.

The application discloses a kind of selenium-rich edible mushroom coarse grain meal replacement powder and preparation method thereof, belong to food technology field, the meal replacement powder is by selenium-rich lentinan, oat, millet, white brown rice, red bean, yam according to specific weight percentage Composition, by raw material selection pretreatment, differentiation ripening, grading crushing sieving, step-by-step mixing, sub-packaging packaging is obtained;The application adopts differentiation ripening process, and different raw material characteristics are baked and cooked respectively, selenium element, lentinan and dietary fiber are retained to the maximum extent;By grading crushing and step-by-step mixing, the uniformity of taste and the solubility are improved, no additive, high safety, with selenium supplementation, spleen and stomach nourishing, enhance immunity function, suitable for sub-health and sugar control crowd long-term consumption, simple process easy industrialization production.

The present application provides a kind of lentinan and its preparation method and application, lentinan preparation method includes: preparation method includes: after crushing lentinan raw material, auxiliary extraction is carried out by adding composite enzyme, decoction 3-5h, filter to obtain lentinan intermediate, then add alpha-glucosidase and beta-glucosidase to obtain reaction liquid, stir to 40-45 ℃, dry to obtain lentinan.The lentinan prepared by the lentinan preparation method of the present application has high activity and meets the quality requirements of lentinan characteristic atlas, the method does not remove protein and alcohol precipitation, can be mass-produced and reduces production cost.The lentinan is modified by using composite enzyme assisted extraction and alpha-glucosidase and beta-glucosidase, which improves the extraction efficiency, and the lentinan obtained has higher activity than ordinary lentinan, which can be used for the treatment of skin disease in pigs, reduces the use amount of hormone drugs, and reduces the drug residue in the body of pig.

The invention discloses a mushroom selenium polysaccharide extraction device and method, and relates to the field of mushroom selenium polysaccharide extraction.The mushroom selenium polysaccharide extraction device comprises a liquid supply unit, an extraction tank and a differentiation and concentration unit; the feeding unit is arranged on a top plate of the bracket pipe; the extraction unit is arranged in the bracket pipe and is connected with a top plate of the bracket pipe; the discharging unit is rotationally arranged at the bottom of the extraction unit; the screw rod is rotationally arranged in the bracket pipe and sequentially penetrates through the feeding unit, the extraction unit and the discharging unit; on the premise of ensuring the biological activity, the lentinus edodes selenium polysaccharide is efficiently extracted from the selenium-rich lentinus edodes.

The invention belongs to the technical field of tremella fuciformis deep processing and biological fermentation, and particularly relates to tremella fuciformis fermentation liquor as well as a preparation method and application thereof. The tremella fuciformis fermentation liquor is supernate obtained after a complex microbial inoculant is subjected to fermentation culture through a tremella fuciformis culture medium. The complex microbial inoculant comprises lactobacillus and saccharomycetes, and the tremella culture medium comprises tremella colloidal liquid, angelica polysaccharide and lentinan. The preparation method comprises the following steps: firstly, carrying out aerobic fermentation on the tremella culture medium by using Kluyveromyces marxianus, then inoculating the lactobacillus plantarum for anaerobic fermentation, centrifuging the obtained fermentation product, and taking the supernate. According to the fermentation liquor, the antioxidant activity is remarkably improved through the synergistic effect of the compound strain and a special tremella culture medium, and the fermentation liquor can be applied to intestine moistening, bowel relaxing and anti-fatigue product development.

This invention discloses a magnetic adsorbent for separating proteins and pigments, its preparation method, and its application. First, ferrous and ferric salts are dissolved in a mixed solvent of water and alcohol, heated to 60–80°C, and an alkaline precipitant is added while stirring until a black precipitate is completely formed, yielding ferric oxide (Fe3O4). Next, the obtained ferric oxide is dispersed in an alcohol-water mixture, and ammonia and tetraethyl silicate are added. The mixture is stirred at room temperature for 2–5 hours to obtain silica-coated ferric oxide. Finally, ε-polylysine is dissolved in water, and the silica-coated ferric oxide is added. After ultrasonic dispersion, the mixture is stirred at 20–30°C for 10–24 hours. After washing and drying, an ε-polylysine-modified magnetic adsorbent is obtained. This invention is used for the purification of lentinan extract, specifically adsorbing proteins and pigments, and can be rapidly separated by an external magnetic field. It has the advantages of simple operation and high adsorption efficiency.