63results about How to "Unique in nature" patented technology

The invention discloses a preparation method of sericin hydrogel, the method is as follows: first, weighting domestic silkworm fibroin deletion form mutation variety silkworm cocoon for LiBr or LiCl extraction and dialysis and purification to obtain a non-degradable sericin water solution with a mass percentage concentration of 0.1-4%; concentrating the sericin water solution to 1.5-10%, adding a cross-linking agent to the concentrated sericin water solution (wherein 2-500muL of the cross-linking agent is added into each L of the sericin water solution), fully mixing, and placing at 4-45 DEG C for 5 seconds to 36 hours to obtain the sericin hydrogel. The sericin hydrogel has biological activity and multiple functions, can be used as carrying growth factors, drugs and cell carriers treatment, and can be applied in repair of a variety of soft tissue injuries, including but not limited to skin damages, muscle damages, injuries of blood vessel, nerve injuries, myocardial damages, and the like, and treatment of diseases.

The invention discloses a preparation method of a graphene oxide / bacterial cellulose antibacterial compound material. The preparation method comprises the following steps: (1) inoculating activated bacterial cellulose into a seed medium to culture, then, inoculating the activated bacterial cellulose into a fermentation medium according to an inoculum size of 5-10%, and after fully and uniformly mixing, putting in a constant-temperature culture box at 30+ / -2 DEG C, standing and fermenting for 1-2 weeks to obtain a bacterial cellulose wet film; (2) after alkali-washing the bacterial cellulose wet film, pulping to a homogeneous phase suspension liquid by virtue of a mechanical method; (3) mixing a graphene oxide solution with the bacterial cellulose homogeneous phase suspension liquid, and carrying out ultrasonic dispersion to prepare a homogeneous phase mixed liquid; (4) decompressing and filtering the homogeneous phase mixed liquid, and freezing and drying to separate the graphene oxide / bacterial cellulose antibacterial compound material. The preparation method of the graphene oxide / bacterial cellulose antibacterial compound material disclosed by the invention is simple, few in step and easy to operate, and the prepared graphene oxide / bacterial cellulose antibacterial compound material has excellent antibacterial performance and can be widely applied to the fields such as medical dressing and artificial skins.

The invention discloses Agrobacterium ZX09, water-soluble beta-glucan prepared from the Agrobacterium ZX09 and the preparation method thereof and the application on reducing blood sugar, wherein the bacterial strain of the Agrobacterium ZX09 is obtained by separating saline soil from Dongying city in Shandong province; the bacterial strain is Agrobacterium sp. and is collected in China Center for Type Culture Collection (CCTCC) on January 21st, 2010; and the collection number is CCTCC NO:M2010020. The structure general formula of the water-soluble beta-glucan prepared from the Agrobacterium ZX09 is as follows: ->(3)-beta-D-Glup-(1->3)-[beta-D-Glup-(1->3)-beta-D-Glup-]3-alpha-D-Glup-(1->3)-alpha-D-Glup-(1)n->, and n in the structural formula is from 100 to 200. The bacterial strain has the advantages of novelty, special properties, salt resistant growth, no pigment secretion in the process of growth, simple and convenient cultivation operation, simple technology, total synthetic media, definite components and low cost, and is suitable for industrial production.

The present invention relates to a method to fabricate a full edible insect powder, with the main raw material as the edible insects with the represent of the flour weevil, the cicada, the cryptympana atrata, the locust and the silkworm pupa. The exploited products in both domestic and international markets at present include the specific animal feeds and the dishes of edible insects, as well as the animal feed made from a certain amount of raw materials of insects. The present invention aims to exploit a full edible insect powder as well as the fabrication method and application thereof to accomplish the industrialized production with a large scale. The technical proposal is that the insects which undergoes both elimination of foreign bodies, toxins and cleaning up in the latter phase of cultivation are killed, dehydrated, roasted, (or dried through refrigeration) dried and refrigerated in vacuum, and then smashed and filtrateed to be the final product. The effect of the present invention is that the full insect powder contains all nutritious elements thereof, including proteins, lipids, vitamins and various trace elements. The present invention has unique characteristic, safety without toxins, wide application fields, feasibility to be the nutrition of serious snacks, and feasibility to be the stuffing of food of various cakes and candies.

A media discovery module (MDM) is described that facilitates a user's access to desired media items. The MDM presents a series of arrays of media items to the user. The user's selection within any array governs the composition of media items that are presented in a subsequent array. Different linking criteria can define the relationship among arrays. In one case, the MDM uses a time-based linking criterion, allowing a user to examine a media item at increasing levels of temporal granularity. In another case, the MDM uses a subject matter-based criterion, allowing a user to examine one or more media items at increasing levels of detail with respect to a subject matter index. The MDM can employ various tools to establish the relationship among media items, including image analysis tools, audio analysis tools, metadata analysis tools, and so on.

The invention discloses a super-hydrophobic anticorrosive coating used for power transmission and transformation devices. The coating comprises, by weight, 10-18 parts of modified nanometer zirconium dioxide, 6-16 parts of modified nano-silica, 20-40 parts of polyurethane resin, 3-7 parts of a curing agent, 2-10 parts of a coupling agent, 0.5-1 part of a leveling agent, 0.5-1.5 parts of an antifoaming agent, 0.5-1 part of a dispersant, 0.2-0.6 parts of a drier, 0.3-1.2 parts of an antioxidant, 0.2-0.6 parts of an ultraviolet absorber, and 30-50 parts of a solvent. The static contact angle of the super-hydrophobic anticorrosive coating used for power transmission and transformation devices reaches up to 160-167 DEG, and the roll angle reaches 2-4 DEG, so the coating has excellent hydrophobic performance; and the super-hydrophobic anticorrosive coating used for power transmission and transformation devices also has the advantages of very good anticorrosive performance, environmental protection and energy saving, environment pollution reduction, and meeting of current green production principles.

The invention discloses a technology for preparing an agricultural drought-resistant water retaining agent, which belongs to the field of one of the agricultural drought-resistant water retaining technologies. The technology is mainly characterized by comprising the following steps of: initiating the polymerization of acrylic acid and acrylamide monomers by using a nanometer silicon dioxide-ammonium persulfate compound system under a low-pressure heating condition. The water retaining agent prepared by using the technology is quite strong in salt resistance (70-120 times in absorbing normal saline), and proper in water absorbency (300-500 times), can resist drought and retain water in soil, simultaneously does not compete for water with plants, does not harden, and therefore can be widely applied to the fields of agriculture and desertification control for drought resistance and water retaining.

The invention relates to novel antibacterial restorative functional dressing and a preparation method thereof. The novel antibacterial restorative functional dressing is formed by crosslinking and compounding chitosan and collagen on a bacterial cellulose membrane through a cross-linking agent, wherein a mass ratio of the chitosan to the bacterial cellulose membrane is (0.001-5) to 100; a mass ratio of collagen to the bacterial cellulose membrane is (0.5-20) to 100; a mass ratio of the chitosan to the collagen is (0.001-5) to (20-0.5); and the collagen is a mixture of collagen with small molecular weight and collagen with large molecular weight according to a ratio of 1 to 1. The antibacterial restorative functional dressing has very good biocompatibility, cellular affinity and mechanical property, has excellent water-permeable, gas-permeable or drainage and moisture absorption effect, has the effects of realizing antisepsis and anti-inflammation, reducing wound infection and quickly relieving pain of the wound, and has the effects of relieving chromatosis and promoting the wound to heal during a wound healing period. Meanwhile, the dressing can naturally drop along with epithelial regeneration, so that the treatment time and cost is reduced, and the wound infection probability is reduced.

The invention relates to a bisamide chain organosilicon quaternary ammonium salt compound and preparation and application of the bisamide chain organosilicon quaternary ammonium salt compound and. The chemical structural formula (please see the formula in the specification) is provided, wherein X- is C1- or Br- or I-, m is any integer ranging from one to eighteen, and n is any integer ranging from one to five; the preparation comprises the steps of firstly, mixing N, N-double methylamine (3- aminopropyl) and fatty acid; secondly, adding solvent and performing temperature reaction to obtain a tertiary amine intermediate; finally, mixing the tertiary amine intermediate and halogen alkyl trimethoxysilane and performing temperature reaction; thirdly, the double amide chain organosilicon quaternary ammonium salt compound is obtained. The bisamide chain organosilicon quaternary ammonium salt compound can be applied to the preparation of hierarchical zeolite. The hierarchical zeolite prepared by the bisamide chain organosilicon quaternary ammonium salt compound can improve the pore volume and specific surface area of zeolite molecular sieve, effectively regulate the pore diameter and pore volume of hierarchical porous molecular sieve through changing the number of carbon atoms of double amide group chain, and further regulate and control the morphology of the hierarchical zeolite through the molar ratio of silicon dioxide in mother-liquid of quaternary ammonium cation surface active agents and the zeolite molecular sieve.

The invention discloses soil paenibacillus and application thereof. The soil paenibacillus is soil paenibacillus NUST16, and the preservation number is CCTCC No.M2016542. According to the soil paenibacillus, the strain is unique in property, exopolysaccharide can be produced, the yield can reach 15 g / L, and the produced exopolysaccharide is easy to separate and purify and unique in property, can be directly dissolved in cold water and regulate the rheological property of an aqueous solution, has the significant effect of increasing the viscosity of the solution, can resist high-concentration Na<+>, K<+>, Ca<2+> and Mg<2+> in the solution and increase the viscosity of the solution by multiple times through simple heating-cooling treatment, is stable in property and can form thermo reversible gel.

The invention relates to a preparation method of a pH value-sensitive curcumin-loading micelle (single chain) precursor. The chemical formula of the pH avid-sensitive curcumin micelle (single chain) precursor is MPEG-PLA-N=Cur. The preparation method comprises the following steps: dissolving modified methoxy poly(ethylene glycol)-poly(lactic acid) of which the terminal contains hydrazino and single-terminal phenolic hydroxyl carbonylated curcumin serving as reaction raw materials in a proper feeding ratio under the action of a certain solvent; carrying out a bonding reaction to form a pH avid-sensitive curcumin micelle monomer. Compared with the prior art, the preparation method has the advantages that a hydrazone bond is introduced into the conventional diblock copolymer (MPEG-PLA) structure and is bonded with curcumin which is a hydrophobic medicament, and a formed amphiphilic polymer is self-assembled into a micelle in an aqueous solution.

The present invention relates to an ostrich oil and Chinese Tibetan medicine ointment for effectively using wound, burn and scald and its preparation method. Said invention includes the following components: 81g of dried rhizome of paris polyphylla, 81g of rubia root, 81g of Chinese angelica root, 100g of sanguisorba root, 150g of flavescent sophora root, 85g of rhubarb, 100g of phellodendron bark, 90g of giant knotweed rhizome and ostrich oil, the weight ratio of ostrich oil and above-mentioned all the Chinese Tibetan medicines extract is 2.5:1. Its preparation method includes the following steps: dissolving ostrich oil at 80deg.C, progressively adding the Chinese Tibetan medicines extract broken to 120 meshes into the dissolved ostrich oil according to the mixing ratio of 2.5:1, then adding small quantity of paraffin wax, quickly stirring them, uniformly mixing them, disinfecting and filling so as to obtain the invented finished product.

The invention discloses water-soluble inlaid thorium fullerene and a preparation method and application thereof. Specifically, the method includes first vacuating a reaction chamber provided with an electrode, filling the reaction chamber with a He atmosphere having a pressure of (2.5-3.5) *10<4> Pa, using a spectral pure graphite rod as a cathode, taking a hollow graphite rod filled with a ThO2 / graphite powder mixture as an anode, and causing the cathode and the anode to undergo arc discharge at a current intensity of 90 to 100 A in the above mixed atmosphere to prepare inlaid fullerene Th@C82; after chromatographic purification, adding a mixed solvent of hydrogen peroxide and ammonia water (at a ratio of 7:3), and heating the mixture at 50 DEG C to perform stirring for 3 h, to prepare the water-soluble inlaid thorium fullerene. The surface of Th@C82 can be modified with hydrophilic groups, at the same time the surface amino groups also facilitate the further coupling with other bioactive molecules to enhance the targeting, the effect of target diagnosis and treatment is achieved, and a broad selection space is provided for subsequent development.

The invention discloses a preparation method of a composite photocatalytic material of porous nano Fe3O4-N doped with Ni / Zn-MOFs / g-C3N4. The method comprises the steps that firstly, urea is calcined to prepare a graphite-phase carbon nitride (g-C3N4) material; then, by adopting ferric chloride, sodium acetate and ethanediamine as raw materials and ethylene glycol as a solvent, a constant-temperature reaction is conducted at 180-220 DEG C for 5-7 h, centrifugal separation is conducted to form solids, and Fe3O4 nano particles with porous structures are obtained; then, zinc nitrate hexahydrate, nickel nitrate hexahydrate, the g-C3N4 material and the Fe3O4 nano particles are added to a mixed solution of N,N-dimethylformamide and ethylene glycol, and a mixed reaction solution is obtained; the mixed reaction solution is transferred to a stainless steel reaction kettle with a polytetrafluoroethylene lining, the temperature is increased to 140-160 DEG C, a constant-temperature reaction is conducted for 5-7 h, centrifugal separation is conducted to form solids, and the composite photocatalytic material of Fe3O4-N doped with Ni / Zn-MOFs / g-C3N4 is obtained. The composite photocatalytic material is of a core-shell structure, g-C3N4 is used as a core, porous nano Fe3O4-N is dispersed on a shell of Ni / Zn-MOFs doped with N, and the material has obvious photocatalytic activity.

The invention belongs to the technical field of food deep processing, in particular relates to an edible mushroom enzymolysis process and further discloses application of the edible mushroom enzymolysis process for preparing edible mushroom flour. The edible mushroom enzymolysis process comprises the following steps: immobilizing cellulase and protease onto a magnetic inorganic material carrier so as to prepare an immobilized complex enzyme, and further performing enzymatic hydrolysis. As an edible mushroom cell wall mainly comprises cellulose, glucan and chitin which are interwoven into a compact reticulate structure which is different from those of other plants, and if edible mushroom is subjected to direct enzymolysis of protease, nutrient substances such as amino acid and nucleotide in cells cannot be completely released. Under the action of synergic effects of the cellulase and the protease for enzymolysis, decomposition and crushing of cell walls are accelerated, the enzymolysis time is shortened, the enzymolysis efficiency is improved, nutrient substances, flavor substances and the like in the edible mushroom can be sufficiently released, and nutrition and feature flavor can be further enriched.

The invention relates to a silver nano-cluster fluorescent nanorod, a preparation method thereof, and an application of the nanorod in white LED. The fluorescent nanorod is formed by self-assembling Ag9 and hydrochloric acid in an aqueous solution. The Ag9 fluorescent nanorod prepared in the invention has outstanding optical properties, still maintains excellent fluorescent performances after being freeze-dried into a powder, can be used to prepare orange red light-emitting LED with a good stability, and can be mixed with a commercial blue phosphor and a commercial green phosphor according toa mass ratio of 10:5:1 to prepare the white light-emitting LED. The luminescent silver cluster can successfully replace the light conversion material of traditional materials in order to provide possibility for producing environmentally-friendly LEDs. The preparation method of the silver nano-cluster fluorescent nanorod of the invention has the advantages of simplicity and low cost; and the prepared LED has an excellent luminous intensity, and meets environmental protection requirements.

The invention discloses a preparation method of a PbSe quantum dot near-infrared light-emitting diode. The preparation method comprises the following steps: adding OA, ODE and PbO powder into a three-necked flask, then injecting nitrogen into the three-necked flask, and thoroughly removing air; heating the three-necked flask until the PbO powder completely disappears, and a mixed solution becomescolorless; adding an Se-TOP solution containing Se powder into the three-necked flask, and heating the three-necked flask to obtain PbSe QDs particles; adding methylbenzene into the three-necked flask, and immersing the three-necked flask in a room-temperature water bath to perform a complete quenching reaction; precipitating and dispersing a PbSe QDs sample by using methanol and ethane, purifyingthe PbSe QDs sample, then dispersing the purified PbSe QDs sample into tetrachloroethylene; and injecting a PbSe QDs solution into a hollow hemisphere through an injector, sealing the hollow hemisphere, and placing the hollow hemisphere containing the PbSe QDs solution on a GaN chip. The near-infrared light-emitting diode prepared by the method has the characteristics of simplicity in manufacturing, narrow band, small size and easiness in tuning.

The invention relates to a nano-silicon dioxide composite hydrogel for 3D printing and wound repair, and belongs to a polymeric biomaterial. Nano-silicon dioxide of which the tail end is connected with a beta-dihydroxy compound serves as an initiating agent and a cross-linking agent, gelatin of which the tail end is connected with a double bond serves as a monomer, nano-silicon dioxide and the gelatin are uniformly dispersed in an aqueous solution, and the nano-silicon dioxide composite hydrogel is prepared through enzymatic-catalysis free radical polymerization under the action of glucose and glucose oxidase. The hydrogel can be prepared at room temperature within 6 min to 30 min by adjusting the concentrations of nano-silicon dioxide with the beta-dihydroxy compound, glucose and glucose oxidase. The hydrogel has the advantages of being mild, efficient, good in mechanical property and high in biocompatibility, therefore, the hydrogel can be used for 3D printing and cell culture, and the hydrogel can be used for tissue engineering of wound repair and the like after being loaded with fibroblast growth factors.

The invention relates to a bisamide bond long carbon chain organosilane quaternary ammonium compound and preparation and application thereof. A structural formula of the compound is shown in the specification, wherein m is any integer from 1-18, n is any integer from 1-5, X is one of Cl<->, Br<-> and I<->. The preparation is as follows: adding N-methylimino diacetic acid, aliphatic amine, 1-hydroxy benzotriazole HOBT, carbodiimide EDCI and triethylamine in a solvent, stirring at room temperature to stay overnight, and purifying to obtain a bisamide chain intermediate; mixing the bisamide chain intermediate and haloalkyl trimethoxy silane, reacting, cooling, and washing to obtain the compound. The compound is applied to the preparation of a mesoporous ZSM-5 molecular sieve. A hierarchical porous zeolite molecular sieve prepared by the invention is capable of obviously improving the pore volume and specific surface area of the zeolite molecular sieve, and the aperture and pore volume of the hierarchical pores of the molecular sieve can be effectively regulated through the changing of carbon atom number of the diacyl aliphatic chain.

The invention discloses a zinc molybdate nanotube and a preparation method thereof. The preparation method comprises the following steps: adding a zinc salt, a molybdenum salt and citric acid as raw materials into deionized water to prepare an inorganic salt solution; using PVP as a polymer template, uniformly mixing the inorganic salt solution and a PVP solution, and then performing electro-spinning; and finally performing calcination treatment on an obtained sample at 400-800 DEG C to obtain the zinc molybdate nanotube. The prepared zinc molybdate nanotube exhibits nanotube morphology, the size of the nanotube is uniform, the nanotube is prepared by piling up zinc molybdate particles with an extremely small size, and exhibits a hollow porous structure, the diameter is 0.1-1 [mu]m, the size of the zinc molybdate particles is 10-200 nm, the specific surface area is relatively large, and the surface is porous. The invention also discloses that the prepared zinc molybdate nanotube can beused as a negative electrode material of a lithium battery to be applied to prepare a battery.

The invention discloses a method for repairing heavy metal-contaminated soil. The method comprises: using acrylic acid modified chitosan as a repairing agent, placing the polluted soil in an aqueous repairing agent solution for stirring and eluting, or applying the aqueous repairing agent to Plow and harrow the paddy fields to be plowed to transfer the heavy metals from the contaminated soil to the eluate, so as to realize the remediation of heavy metal (Pb, Cr, Cu) contaminated soil. Acrylic acid-modified chitosan, a repairing agent, is prepared by Michael reaction between chitosan and acrylic acid. It has the advantages of environmental protection, non-toxic, harmless, biodegradable, no secondary pollution, and rich sources of raw materials. The remediation agent has a good remediation effect on soil polluted by heavy metals, and the heavy metal content of the remediation soil reaches the first-class standard of farmland land. The chitosan derivative restoration agent adopted in the method is environmentally friendly, has good water solubility, and has a strong ability to chelate heavy metals.

The invention relates to chitosan for edible insects like cicada and river shrimp and grasshopper and silkworm chrysalis, as representatives. Nowadays, the developed product in the market at home and abroad mainly includes special animal feed and edible insect food, and a quantity of insect raw material is exported as pet feed. The objective of the invention is treating the redundant insect skin filter off during edible insect treating process. The production method and application of the chitosan for edible insect realizes the commercial process and mass production. Technology is as follows: crushing and beating, separating, degreasing, decalcifying, deacetyling, decolouring, vacuum freeze drying, and meshing the edible insect skin to get the finished product. Effects are as follows: the chitosan, as the polymer material, is of unique property, safety and innocuity, well applied range, and becomes the industry raw material for making high added value byproduct in many fields like food field, medical field, cosmetic field, agriculture field, chemical industry and environmental protection field.

The invention belongs to the field of pharmaceutical preparations, and relates to a recombinant protein vaccine alpha 1,3-fucosyltransferase nanoparticle and a preparation method thereof. The recombinant protein vaccine alpha 1,3-fucosyltransferase nanoparticles prepared by the invention not only can improve the absorption of alpha 1,3-fucosyltransferase in body intestines, but also can improve the ability of macrophages to take in alpha 1,3-fucosyltransferase, and can be used for preventing and treating infection caused by helicobacter pylori.

The invention discloses Agrobacterium ZX09, water-soluble beta-glucan prepared from the Agrobacterium ZX09 and the preparation method thereof and the application on reducing blood sugar, wherein the bacterial strain of the Agrobacterium ZX09 is obtained by separating saline soil from Dongying city in Shandong province; the bacterial strain is Agrobacterium sp. and is collected in China Center for Type Culture Collection (CCTCC) on January 21st, 2010; and the collection number is CCTCC NO:M2010020. The structure general formula of the water-soluble beta-glucan prepared from the Agrobacterium ZX09 is as follows: ->(3)-beta-D-Glup-(1->3)-[beta-D-Glup-(1->3)-beta-D-Glup-]3-alpha-D-Glup-(1->3)-alpha-D-Glup-(1)n->, and n in the structural formula is from 100 to 200. The bacterial strain has the advantages of novelty, special properties, salt resistant growth, no pigment secretion in the process of growth, simple and convenient cultivation operation, simple technology, total synthetic media, definite components and low cost, and is suitable for industrial production.

The invention discloses a photocatalytic material capable of rapidly capturing carbon dioxide and releasing oxygen. According to the invention, a thylakoid / manganese-based light-capturing oxygen-releasing composite material is prepared by utilizing photocatalytic oxygen-releasing properties of extracted in-vitro thylakoid and manganese dioxide through a material compounding preparation method, sothat the photosynthesis efficiency of the thylakoid is further improved; and the material has advantages of easy obtaining, simple preparation method, mild preparation condition, environmental protection, no pollution, biodegradability and the like, and has potential application prospects in the field of environmental protection, especially air purification.

The invention relates to a method for determining the position that a magnet has at a time of measurement relative to a row of sensors extending in a row direction, wherein the position of the magnet relative to the row of sensors can be changed in the direction of the row direction or in the direction parallel to the row direction, wherein the row of sensors has a first magnetic-field-sensitive sensor and a second magnetic-field-sensitive sensor, which is arranged spaced apart from the first sensor in the row direction, wherein a first sensor signal is generated by the first sensor, the value of which, at the time of measurement, depends on the position of the magnet relative to the first sensor at the time of measurement, and a second sensor signal is generated by the second sensor, the value of which, at a time of measurement, depends on the position of the magnet relative to the second sensor at the time of measurement, wherein, in a first examination, the value that the first sensor signal has generated at the time of measurement is compared with a first reference value and / or is checked as to whether it belongs to a first value range, in a second examination, the value that the second sensor signal has generated at the time of measurement is compared with a second reference value and / or is checked as to whether it belongs to a second value range, a relative value is formed from the value that the first sensor signal has generated at the time of measurement and the value that the second sensor signal has generated at the time of measurement, and, in a third examination, this relative value is compared with a third reference value and / or is checked as to whether it belongs to a third value range, and from the result of the first examination and the result of the second examination and the result of the third examination, a determination is carried out as to which of the sensor signals should be regarded as the leading signal for the time of measurement, wherein the position of the magnet relative to the row of sensors at the time of measurement is determined by evaluating the leading signal determined in this manner.

The invention relates to a 4-carboxylphenyl retinamide ethanol compound, a preparation method thereof, and a medicinal composition and application thereof. The structural formula is shown as the specifications.

A frozen ready-made polenta in the form of frozen granules or flakes with a greater dimension of 1-60 mm and an average weight ≦6.0 g, homogeneous in size and able to be thawed and / or heated rapidly to produce polenta having texture and organoleptic characteristics of freshly cooked polenta; a process for producing a frozen ready-made polenta in the form of granules or flakes, comprising steps of: providing a traditional polenta at a temperature ≧40° C.; dividing it into semifinished products in the form of granules or flakes; deep-freezing the semifinished products by keeping them into a bath of a liquid at a temperature of ≦−30° C. for a first time interval, thus obtaining partially deep-frozen granules or flakes of polenta; subjecting such granules or flakes for a second time interval to a second deep-freezing step at a temperature between −90° C. and −30° C., thus obtaining deep-frozen granules or flakes of polenta.