426 results about "Natamycin" patented technology

The invention discloses a lichee natural coating antistaling agent which is characterized in that the coating antistaling agent comprises an antistaling agent A and an antistaling agent B. The antistaling agent employs fresh-keeping components of chitosan, citric acid, natamycin, tea polyphenol, ascorbic acid and the like. In the fresh-keeping process, the antistaling agent is coated on lichee twice for keeping fresh, each fresh-keeping component can be effectively kept on the fruit rough surface of whole lichee, the condition of uneven thickness caused by downward fresh-keeping liquid in thesubsequent treatment and operation processes of placing, air drying and the like can be avoided, the uniform thickness of the film can be effectively controlled, simultaneously, the fresh-keeping effect of each fresh-keeping component is fully performed, and the antistaling agent has good fresh-keeping effect and long fresh-keeping time. In addition, the antistaling agent has the advantages of safety, no toxicity, simple scheme and easy operation, and is convenient for industrial production.

A substrate for mushroom cultivation comprises a polyene fungicide, in particular, natamycin. Mushrooms cultivated in such substrates can be harvested earlier than mushrooms cultivated in substrates which do not include polyene fungicides. Alternatively, mushrooms grown in a substrate comprising a polyene fungicide achieve a greater size than mushrooms grown for the same amount of time in a substrate which does not include a polyene fungicide.

The invention discloses a strain of Streptomyces lydidii and its application. The strain is Streptomyces lydicus A01 CGMCC No.1653. The bacterial strain can produce natamycin and will be widely used in the preparation of inhibitors of natamycin-sensitive bacteria.

The invention relates to the technical field of litchi preservation, and particularly discloses a room-temperature litchi storage preservative, and a preparation method and an application of the preservative. The preservative mainly comprises carboxymethyl-chitosan, nisin, natamycin, tea polyphenol, epsilon-polylysine, citric acid and phytic acid; litchi fruit is soaked in a preservation solution, and then aired, so that the litchi fruit can be stored at a room temperature; the quality and low level browning of the litchi fruit can be kept for a long time at the room temperature. Litchi treated by the preservative has the characteristics that the preservative is good in preservation effect, safe, environment-friendly, simple to operate and convenient to use; the preservative is extensive in source, low in cost, edible, and easy to degrade; no pesticide residue risk exists; short-term preservation during room-temperature storage and room-temperature logistics can be achieved; the preservative is a novel preservation material with a great development potential.

The invention relates to a compound rice cake antistaling agent and a fresh keeping method. The compound antistaling agent comprises 0.03-0.1wt% of nisin, 0-0.1wt% of lysozyme, 0.03-0.1wt% of natamycin and a film forming agent; and the film forming agent comprises chitosan, acid and water, the specific proportions are 1-3wt% of the chitosan, 0.5-1wt% of the acid and the water, and a pH value of the film forming agent is controlled at 3.0-5.0, wherein, the acid is selected from lactic acid, citric acid or glacial acetic acid. The rice cake is soaked into 3-4 folds of the compound antistaling agent by volume for 1-5minutes, and then the rice cake is packaged in vacuum. The fresh keeping method can help better preserve the quality of the rice cake, inhibit external microbe invasion, sterilize the rice cake inside, and effectively solve the problem of relatively hard texture of the rice cake.

The invention discloses to a preparation method of R-polysaccharide fermentation liquor and a preparation method of a composite preservative of the R-polysaccharide fermentation liquor, relating to a preparation of fermentation liquor and a preparation method of a composite preservative of the fermentation liquor, which solves the problems of complex preparation technology of the traditional R-polysaccharide preparation, and high production cost and low yield of the preparation of a preservative of the traditional R-polysaccharide preparation. The preparation method of the R-polysaccharide fermentation liquor comprises the following steps of activating bacillus subtilis, streptococcus thermophilus and brewers' yeast; collecting and washing after being centrifuged; fermenting and cultivating the thalluses after mixing; and purifying the fermentation liquor. The preparation method of the preservative is as follows: mixing nisin, natamycin, propionic acid, antioxidant of bamboo-leaf, chitosan, ethylene diamine tetraacetic acid (EDTA), cellulose, ethanol, sorbitol and oxygen-enriched active water; and mixing the mixed liquor and the R-polysaccharide fermentation liquor to be reacted. The preparation of the R-polysaccharide fermentation liquor has the advantages of simple technology, no three-waste generation, no pollution discharge and no peculiar smell. The R-polysaccharide fermentation liquor is prepared into a composite preservative, the production cost is ** yuan/ton, and the yield is high.

The invention discloses a Nisin composite biological preservative and a preparation method thereof. The preservative comprises the fermentation broth of lactic streptococci and components consisting of, on the basis of the weight of the fermentation broth of lactic streptococci, 0.2 to 0.6% of chitosan, 0.1 to 0.2% of antioxidant bamboo leaves, 1 to 5% of sodium hexametaphosphate, 0.5 to 1% of natamycin, 0.1 to 0.2% of garlicin, 0.05 to 0.1% of sodium ascorbate, 1 to 3% of maltodextrin and 0.5 to 2% of NaCl. The preservative provided by the invention does not contain any chemical preservative, overcomes the defects of a narrow antibacterial spectrum and low dependence on a pH value of pure Nisin, has the characteristics of high efficiency, a wide spectrum, good stability and high security, greatly improves the preservative effect and the application range of Nisin and produces high economic benefits and social benefits.

The preparation method of natamycin belongs to a technique for producing and extracting natamycin by using luteofuscus spore streptomycete as strain and adopting fermentation process. It includes the following steps: adopting luteofuscus spore streptomycete, preparing spore suspension liquor, culturing seed, making femrentation, extracting, controlling pH value and dissolved oxygen level, and adopting glucose-feeding mode in batches in the period of fermentation to prepare natamycin. In order to raise its yield, adopting low-temp. evaporation methanol-removing process to extract natamycin.

The invention relates to a composite natural fresh-keeping agent for cold fresh meat and application of composite natural fresh-keeping agent. The composite natural fresh-keeping agent for the cold fresh meat is characterized by comprising tea polyphenol, chitosan, nisin, natamycin, lysozyme, oregano essential oil, vitamin C, vitamin E, erythorbic acid, a spice extract and water in certain proportions by weight, wherein the spice extract is obtained by extracting ginger, garlic, cinnamon, cardamom, clove and rosemary in certain proportions by weight through ethanol extraction. The composite natural fresh-keeping agent for the cold fresh meat is prepared from biological-source raw materials by a simple preparation method, has the advantages of non-toxicity, safety, broad antibacterial spectrum and the like, is convenient to operate during using and prominent in fresh-keeping effect, and has an important industrial value.

The present invention describes a process to preserve a water-containing product such as a foodstuff, which comprises adding natamycin and nisin to the product, whereby at least 90% (w/v) of natamycin is dissolved and/or less than 10% (w/v) of natamycin is present in crystal form.

The invention relates to a method for improving the natamycin action efficiency. The method comprises the following steps: taking cyclodextrin and derivatives as the supermolecule host compounds to prepare a natamycin/cyclodextrin supermolecule clathrate; and keeping the bacteriostatic activity of natamycin and improving the water solubility and stability of natamycin. The preparation method for the natamycin/cyclodextrin supermolecule clathrate comprises the following steps: preparing an aqueous solution of the cyclodextrin and the derivatives through ultra pure water to reach certain solubility; adding a certain amount of natamycin into the aqueous solution of the cyclodextrin and the derivatives, and carrying out ultrasonic treatment for 5 minutes to improve the complexation efficiency; and covering a layer of aluminum-foil paper on the container of the suspension, placing the container on a shaking table at a room temperature for reaction, and obtaining the homogenous solution of the natamycin/cyclodextrin supermolecule clathrate after reaching the balance. The method has the advantages of improving the solubility and stability of natamycin in the aqueous solution, improving the natamycin bioavailability, solving the problem of poor water solubility of natamycin, and improving the action efficiency of the biological bacteriocide natamycin.

The invention relates to a preparing method for mildew inhibitor for feed. The proportioning by weight of the mildew inhibitor for feed is 10-25 clove oil, 10-20 oil of chinese cinnamon, 5-15 natamycin, 5-15 acetic acid or ethylformic acid and 35-60 transporting species. The preparing method is throwing clove oil, oil of chinese cinnamon and acetic acid or ethylformic acid into the reactor by proportion, heating to 50-60degrees at the condition of mixing round, adding matching weight natamycin to total solubilization, mixing the above material and matching weighttransporting species in mixing machines, and then comminuting, siftting out, checking up and packaging after cooling down the above material. The product is more conform to environmental-protection with its less irritation and more security, and has good effect on mildew resistance, strong bacteriostatic effect and palatability as its principal raw material is clove oil and oil of chinese cinnamon with matching some natural bacteriostatics natamycin.

The invention provides a high-efficiency broad-spectrum food composite preservative and aims to solve the technical problem that most of the food preservatives now used in food processing are potassium sorbate and sodium benzoate, cannot achieve ideal preservation effect when use alone due to certain limitation to antibacterial spectrum and suffers certain limitation on use. The key point of the preservative lies in that the preservative contains nisin, natamycin, potassium sorbate, sodium diacetate and sodium dehydroacetate or also one or all of d-sodium erythorbate and d-glucono-delta-lactone. The use of the preservative is to be added in various foods.

The present invention relates to a bakery product, which is protected by natamycin against spoilage, as well as to a process for preventing mould spoilage of bakery products. The viscosity of the natamycin suspension is increased by a thickener before it is sprayed onto the bakery product. The thickener ensures that the natamycin is evenly distributed on the surface of the bakery product.

The invention discloses a compound biological preservative. The compound biological preservative comprises the components as follows: 0.1-5 g of component B is added in each 1L of component A, the component A is fermentation liquor of Bacillusamyloliquefacienssubsp.plantarum BGP20 strains, and the component B is natamycin. The compound biological preservative is used for preventing and controlling diseases of fruits and vegetables in a storage period and particularly can be used for simultaneously preventing and treating bacterial soft rot and various fungal diseases (for example, phytophthora capsici, rhizopus soft rot, pythium blight and the like) of fruits and vegetables in the storage period, avoiding or reducing residual chemical pesticides and agricultural antibiotics and maintaining the quality of the fruits and vegetables in the storage period, so that the compound biological preservative has good economic and social benefits.

The invention discloses a making method of hand tear bread. The method comprises the following steps that 1, 100 parts of high gluten flour, 20-27 parts of low gluten flour, 60-70 parts of butter, 18-25 parts of granulated sugar, 1-2.5 parts of salt, 2-3 parts of yeast, 10-15 parts of eggs and 65-80 parts of milk are weighed and prepared; 2, all the food materials except the butter are poured into a stirrer for stirring, and dough is formed; 3, the dough is subjected to flattening and put into a refrigerator for refrigeration; 4, the butter is wrapped by the dough subjected to refrigeration, and the dough is folded multiple times; 5, the treated dough is put into the refrigerator for refrigeration; 6, the dough subjected to refrigeration is folded multiple times and then compacted; 7, shaping treatment is conducted on the dough; 8, the dough subjected to shaping is put at room temperature for fermentation; 9, natamycin is sprayed on the surface of the dough; 10, the dough is put into an oven finally. The hand tear bread made through the method is soft and delicious, making is easy and convenient, and the refreshing time of the hand tear bread is long.

The invention discloses a method for preparing natamycin by using natamycin fermentation liquor. The crystals of natamycin can be obtained by extracting, decoloring, absorbing, crystallizing and the like in the presence of a filter aid. The method has the advantages of environment-friendly preparation process and the obtainment of high-purity natamycin.

The invention relates to a compound biological preservative, a preparation method thereof and an application thereof. Each 100g of compound biological preservative comprises 20 to 80g of epsilon-polylysine, 1 to 30g of nisin, 1 to 20g of natamycin, 1 to 20g of nipagin ester, 1 to 10g of sodium propionate, 0.01 to 0.5g of ascorbic acid, 5 to 20g of malic acid and 0.1 to 1g of trimeric sodium phosphate. The compound biological preservative is used in Guang type seasoned sausage products, and the addition amount is 5 to 15g per 50 kg. The compound biological preservative prepared mainly from the epsilon-polylysine can effectively reduce the use amount of salt and white granulated sugar in Guang type seasoned sausages, and has the characteristics of low toxicity, high efficiency and less addition amount. With the advantages of wide antimicrobial spectrum and high bacteriostasis, the compound biological preservative has favorable effect for inhibiting Gram-negative escherichia coli and salmonella which are not easy to inhibit by other natural preservative, and also has inhibiting effect on heat-resist bacillus and some viruses.

A cationic adhesive-type natamycin nanometer eye drop comprises natamycin, a proper amount of osmoregulator and pH regulator. The eye drop is characterized by further comprising chitosan, pluronic F-68 and phospholipid, wherein, the mass percent concentration of the phospholipid in the eye drop is 0.01-2%, the mass percent concentration of the pluronic F-68 in the eye drop is 0.1-20%, and the mass percent concentration of the chitosan in the eye drop is 0.01-4%. The molecular weight of the chitosan is 5000-300000, and the deacetylation degree of the chitosan is greater than 85%. The natamycin nanometer eye drop is characterized by making a common natamycin suspension into suspension particles with the diameter ranging from 10nm to 1000nm, thus increasing solubility of the eye drop and enhancing safety and effectiveness. The natamycin particles of the common suspension are modified by the phospholipid and the chitosan to cause the particles to be positively charged, which is helpful to improve absorption of the eye drop by cornea, enhances drug effect and prolongs the action time of the eye drop. And the chitosan has bioadhesion function, which enhances the adhesiveness between medicinal particles and the cornea.

The invention discloses a high-efficiency mould-proof preservative special for preserving garlic stems, which consists of the following components in percentage by weight: 1 to 5 percent of chitosan, 0.05 to 0.1 percent of nipagin ester, 0.001 to 0.01 percent of natamycin, 0.05 to 0.1 percent of thiabendazole and the balance of water. The garlic stem preservative has low cost and is convenient to apply and high-efficiency and safe; by combining measures and technology such as low temperature, spontaneous modified atmosphere packaging and the like, the garlic stems treated by the preservative are bright green, have tender tissues and are still fresh after being stored for 6 to 8 months, and mould does not grow in garlic involucre and strips; the commodity rate reaches 95 percent; and the preservation effect is good.

The invention discloses an environment friendly biological preservative film. The environment friendly biological preservative film comprises polylactic acid, straw fiber, glycerol, polydiphenylmethane diisocyanate, lactic streptococci peptide, dichloromethane and natamycin. The preparation method comprises the steps of: preparing a synthetic fabric component by using straw fiber, oat fiber, glycerol, distilled water and polydiphenylmethane diisocyanate; preparing an antibacterial preservative by polylactic acid, dichloromethane, lactic streptococci peptide and natamycin; then mixing the synthetic fabric component with particles of polylactic acid, carrying out melt extrusion, blow molding and cooling to prepare a biological film; and uniformly coating the antibacterial preservative. With the adoption of the biological preservative film provided by the invention, high strength of the thin film can be maintained while the production cost of the polylactic acid thin film is greatly reduced, so that the tensile strength, the elongation at break, the frictional coefficient and the light transmittance of the environment friendly biological preservative film meet the national state, and the environment friendly biological preservative film further has good antibacterial preservative performance of food package.

The invention relates to a method for preparing natamycin, which carries out fermentation to Streptomyces lydicus so as to obtain the natamycin. The method initiatively uses the fermentation of the Streptomyces lydicus for producing the natamycin, thus providing a new way for producing the natamycin. The natamycin produced by the method has high purity. The method can be widely applied to the production of the high-purity natamycin.