13results about How to "Prevent browning" patented technology

This invention relates to the field of food preservation technology and discloses a liquid preservative for preserving fresh walnut kernels. The preservative comprises a natural preservative, a solubilizing and stabilizing agent, and a solvent. This liquid preservative uses natural phloretin as the preservative component, combined with Tween 80 as a solubilizing and stabilizing agent and ethanol as a solvent. This effectively solves the problems of poor water and oil solubility and inadequate stability of phloretin, allowing it to be stably dispersed in the preservative system and fully exert its antioxidant and antimicrobial effects. Furthermore, the preparation method is simple and easy to implement, and the production process is safe and controllable. It is convenient to use; the preservation of fresh walnut kernels can be achieved through dilution and soaking. The diluted solution can be reused, reducing usage costs. Simultaneously, it can inhibit bacterial growth during the storage of fresh walnut kernels, delay oxidative deterioration, maintain their good appearance and quality, extend shelf life, and meet the market demand for high-quality fresh walnut kernels.

The utility model relates to the technical field of sweet potato peeling, and discloses a sweet potato selecting and peeling device which comprises a peeling box, the top of the peeling box is connected with a box cover through a hinge, a motor is installed at the bottom of the peeling box, and the output end of the motor is fixedly connected with a rotating shaft. The other end of the rotating shaft extends into the peeling box and is fixedly connected with a centrifugal disc, the top of the centrifugal disc is fixedly connected with a frosted plate through a mortise lock mechanism, a spraying box is installed at the position, located above the frosted plate, in the peeling box, and water tanks are fixedly connected to the outer surfaces of the two sides of the peeling box correspondingly; according to the device, spraying water can be continuously added into the spraying box through the pumping and pressing mechanism while the motor drives the centrifugal disc and the frosted plate to rotate and peel, so that the surfaces of sweet potatoes can be isolated from air by utilizing the spraying water, and the surfaces of the peeled sweet potatoes can be prevented from generating browning and breeding bacteria; therefore, the peeling quality of the device is greatly improved.

The invention relates to the technical field of microorganisms and the field of food, in particular to lactobacillus plantarum for inhibiting brown stain of soybean paste and application of lactobacillus plantarum. The lactobacillus plantarum is screened from traditional naturally-fermented peasant soybean paste in northeast China, and is preserved in China General Microbiological Culture Collection Center (CGMCC) on June 30, 2025, and the preservation number is CGMCC No.35048. The lactobacillus plantarum has an obvious browning inhibition effect and can be widely applied to fermented food production.

The application discloses a method for reducing the browning rate of Zanthoxylum bungeanum in tissue culture, and belongs to the technical field of Zanthoxylum bungeanum tissue culture. The method is characterized by adopting polyvinylpyrrolidone and modified chitosan as raw materials to prepare a prevention and control agent, coating the tissue culture material with the prevention and control agent, inoculating the coated tissue culture material into a culture medium, and then carrying out tissue culture, so that the phenolic substances released by the tissue culture material and the quinone products formed by oxidation are adsorbed and fixed and covalently combined, the damage to the tissue culture material is reduced, the browning rate of Zanthoxylum bungeanum in tissue culture is effectively reduced, the propagation efficiency of Zanthoxylum bungeanum in tissue culture is ensured, and the method has a good application prospect in the field of Zanthoxylum bungeanum tissue culture.

The invention relates to the technical field of microorganisms, and particularly discloses bacillus subtilis KG25 and application thereof. The bacillus subtilis KG25 is preserved in the China Center for Type Culture Collection on September 1, 2025, the classification name of the bacillus subtilis KG25 is bacillus subtilis KG25, and the preservation number of the bacillus subtilis KG25 is CCTCC (China Center for Type Culture Collection) NO: M 20251927. The bacillus subtilis KG25 provided by the invention can be used for synthesizing surfactin with relatively high content, has a function of inhibiting enzymatic browning, and has a very remarkable fresh-keeping function on fresh-cut fruits and vegetables. The composite preservative containing the bacillus subtilis KG25 fermentation liquor provided by the invention is used for soaking fresh-cut fruits and vegetables, so that the normal-temperature storage period can be prolonged to 7 days, and the composite preservative has a wide application prospect in the field of fruit and vegetable preservation.

The invention belongs to the technical field of plant tissue culture, and discloses a Paeonia fulva tissue culture and rapid propagation method for inducing cluster buds by using immature embryos, which comprises the following steps: collecting fresh seeds at a specific development stage, sterilizing, and stripping embryos aseptically; inoculating the embryos into a germination culture medium containing 6-BA, IAA and GA3 to start culture; after radicle tail ends of the germinating embryos are cut off, the embryos are directionally inoculated to a subculture medium according to the original polarity, and sterile seedlings are obtained; transferring the seedlings into an induction culture medium containing 6-BA, IAA and charcoal to induce cluster buds, and further proliferating; cutting robust tender shoots, removing cotyledons, and inoculating into a rooting culture medium containing IBA (indolebutyric acid), NAA (naphthylacetic acid) and charcoal to induce rooting; and finally, carrying out strong seedling culture and domestication transplanting to obtain a survived plant. According to the method, the deep dormancy obstacle of the seeds is broken through, efficient and stable regeneration from embryos to seedlings is achieved, the breeding cycle is short, the rooting and transplanting survival rate is high, and the method is suitable for large-scale protection and production of rare resources.

The invention discloses an agrobacterium tumefaciens-mediated bottle gourd stable genetic transformation method. The invention provides a bottle gourd stable genetic transformation system mediated by agrobacterium tumefaciens. The system provides a key technical platform for gene function research and molecular breeding of bottle gourds. An agrobacterium tumefaciens-mediated genetic transformation method is adopted, and the principle is that a target gene is inserted into a modified T-DNA region, an agrobacterium tumefaciens infection mechanism is utilized to realize transfer and integration of an exogenous gene to a plant cell, and a transgenic plant is obtained by combining a tissue culture technology. According to the method, screening culture is not carried out, after co-culture is carried out for two days, a fluorescence microscope is used for observing the fluorescence area of a groove part of a seed notch, the agrobacterium infection efficiency is judged, screening is carried out, and detection is carried out again after seedlings are obtained, so that the time is saved by 30-40 days compared with genetic transformation of plants needing screening culture; the method has the advantages of good hereditary stability and simple operation.

The application provides a preparation and application of an anti-aging starch-based emulsifier, wherein the preparation method comprises five steps of amorphization, oxygen-free pyrolysis, low-temperature gelatinization, centrifugal separation and spray drying; the amorphization and overheated steam treatment are combined, the pyrolysis efficiency and solubility of starch are improved, and browning and peculiar smell are prevented; the starch granules after pyrolysis are subjected to low-temperature gelatinization and centrifugal separation to obtain a soluble starch solution with suitable molecular weight and chain length distribution, and the starch granules form granular molecular clusters in water, adsorb and stabilize the oil-water interface; due to strong adsorption force, the starch molecular clusters are difficult to be widely crosslinked, and the aging of the starch emulsifier is effectively inhibited; the starch-based emulsifier provided by the application has the characteristics of anti-aging and pure naturalness, and is suitable for food, pharmaceutical and other industries.

The present application relates to a kind of monocotyledon green wisteria rapid propagation method, using the characteristics of green wisteria specific tissue cell totipotency, under open condition, using liquid medium to induce green wisteria specific site of in vitro leaf split differentiation, produce regenerative root and regenerative bud, finally form plant.The present application aims at the rapid propagation method of green wisteria leaf, without sterile environment, convenient to take material, easy to operate, low in cost, short in period, high in survival rate, with the advantages of high efficiency, economy, easy to scale, factory, etc., in green wisteria rapid seedling, specific material preservation and propagation has greater application value.

The invention relates to the technical field of beverage processing, and particularly discloses selenium-enriched apricot kernel juice and a preparation method thereof. According to the preparation method provided by the invention, almonds are taken as a base material, xylitol is adopted to completely replace cane sugar, a Maillard reaction is blocked, a delta E color difference value is less than or equal to 1.2, and bitter taste is eliminated; constructing a mono-and diglycerol fatty acid ester compound emulsifier, and cooperating with limited xanthan gum to form an emulsification system, so as to realize the fat globule particle size lt; the viscosity of the system is 120 + / -10 mPa.s; sodium bicarbonate is added to adjust the pH value to 7.8-8.0, and a selenium-rich wheat aleurone layer and an emulsification system are utilized for co-embedding, so that the selenium recovery rate is gt; the prepared selenium-rich apricot kernel juice has the characteristics of stable color, smooth taste and efficient selenium enrichment, and is suitable for industrial production.

The application provides a Monascus and protease synergistic treatment method and a Monascus and protease treatment product and application, and relates to the technical field of microbial fermentation. The Monascus and protease synergistic treatment method provided by the application comprises the following steps: in a fermentation environment, Monascus 30192 performs solid-state fermentation on a fermentation substrate to obtain a fermentation product; and in an enzymolysis environment, alkaline protease performs enzymolysis on the fermentation product, and then enzyme inactivation is performed to obtain a Monascus and protease treatment product. The Monascus 30192 which does not produce citrinin is used to perform solid-state fermentation first, and then enzymolysis under the action of alkaline protease, so that the Maillard reaction can be effectively avoided, the removal efficiency of anti-nutritional factors can be significantly improved, active functional components can be enriched in the Monascus and protease treatment product, the protein content and antioxidant activity in the Monascus and protease treatment product are improved, the Monascus and protease treatment product is suitable for the fields of food and animal feed, and the method provided by the application has high adaptability to the existing production line, and is beneficial to industrialization amplification.

The invention relates to the field of functional microorganism application and food production, in particular to antioxidant peptide separated from fermented soybean paste and application of the antioxidant peptide. The amino acid sequence of the antioxidant peptide is any one of the following sequences: PGPIGPR, WNPQGPR, HLPDPL, KPFANP, and RADFYNPK. After solid-phase synthesis, the antioxidant peptide shows good antioxidant capacity equivalent to that of vitamin C, can be widely applied to the field of fermented food production, and is beneficial to promoting the industries such as soybean paste to develop towards a deep and efficient processing direction.

This invention discloses a method for tissue culture of *Anoectochilus pingbianense*, comprising: selecting wild *Anoectochilus pingbianense*, removing leaves and roots, rinsing, cutting stem segments, soaking in alcohol and rinsing with sterile water, soaking in sodium hypochlorite and rinsing with sterile water again to obtain treated stem segments; inoculating the treated stem segments into an induction medium for culture; inoculating the obtained stem segments into a rooting medium for culture; and inoculating the obtained stem segments into a tissue culture seedling medium for culture to obtain tissue culture seedlings with complete roots, stems and leaves. This invention solves the problems of severe browning and long propagation cycle in existing *Anoectochilus pingbianense* tissue culture, which cannot meet production needs, greatly reduces possible contamination during tissue culture, reduces the browning rate of explants, and shortens the growth cycle of tissue culture seedlings.