21 results about "Sodium dehydroacetate" patented technology

The invention provides application of a bacteriostatic agent in open type tissue culture and rapid propagation of polyploidy bamboo reeds, and relates to the technical field of tissue culture and rapid propagation of plants, the bacteriostatic agent is applied to the open type tissue culture and rapid propagation process of the polyploidy bamboo reeds, and the use method is that the bacteriostatic agent is added into a culture medium for use or sprayed or oscillated and flushed for use, and the bacteriostatic agent is applied to the open type tissue culture and rapid propagation process of the polyploidy bamboo reeds. The bacteriostatic agent is formed by mixing isothiazolinone and sodium dehydroacetate, the mass addition ratio of the isothiazolinone to the sodium dehydroacetate is (8-5): (2-5), and the method comprises the following steps: S1, primary culture of explants; s2, multiplication culture of seedlings; s3, rooting culture, wherein each liter of the culture medium contains 0.05-1g of the bacteriostatic agent in the above steps. The method has the beneficial effects that under the condition that the method does not need to be controlled in a sterile environment and does not depend on the quality of an inoculator, a large amount of propagation of the polyploidy bamboo reed tissue culture seedlings is realized by adopting an open tissue culture technical mode, the productivity speed of a tissue culture center is improved, and the construction threshold and cost of the tissue culture center are reduced.

The invention discloses a ratio-type fluorescence analysis method for determining sodium dehydroacetate, which comprises the following steps: under an alkaline condition, synthesizing tetrafluoroterephthalic acid oxide, namely a fluorescent substance TFAox, by oxidizing tetrafluoroterephthalic acid with hydrogen peroxide, and forming a ratio-type fluorescence probe by the fluorescent substance and rhodamine B, a ratio-type fluorescence analysis method of sodium dehydroacetate is constructed based on the ratio-type fluorescence probe, and the method can be successfully applied to determination of sodium dehydroacetate in a water sample and a bread sample. The ratio-dependent fluorescence detection method for determining sodium dehydroacetate provided by the invention has the characteristics of wide linear range, high detection sensitivity, no interference of coexisting substances on determination, good selectivity and the like.

The invention discloses fresh and wet sweet potato vermicelli and a preparation method thereof, the fresh and wet sweet potato vermicelli comprises the processing raw materials of sweet potato starch, domestic drinking water, an acidity regulator and a fresh-keeping preservative, the usage amount of the fresh-keeping preservative is 0.05-0.6% of the weight of the starch raw material, and the preparation method comprises the following steps: weighing the raw materials of the fresh and wet vermicelli, preparing starchy sauce, preparing dough, mixing slurry, curing and forming, and the like, thereby obtaining the fresh and wet sweet potato vermicelli. Aging the cured vermicelli for 1-2.5 hours in an environment of 10-1 DEG C, so as to obtain aged vermicelli; and cutting the aged vermicelli into strips, performing vacuum packaging, and performing pasteurization to obtain the product. In the preparation process of the fresh and wet sweet potato vermicelli, potassium cinnamate, thymol and aloe extract are added as fresh-keeping preservatives. The method overcomes the problem that chemical preservatives such as sodium dehydroacetate cannot be added into the fresh and wet sweet potato vermicelli, and prolongs the shelf life of the fresh and wet sweet potato vermicelli.

The invention discloses organic zinc antibacterial gel and a preparation method thereof. The organic zinc antibacterial gel consists of water, chitosan and a zinc antibacterial agent, wherein the zinc antibacterial agent is zinc dehydroacetate as shown in the following formula. The preparation method of the organic zinc antibacterial gel comprises the following steps: uniformly stirring and mixing chitosan, water, organic acid and sodium dehydroacetate for reaction, then adding a salt solution of zinc ions, fully stirring, and finally cooling to obtain the organic zinc antibacterial hydrogel. The antibacterial property of the hydrogel can be remarkably improved, and the hydrogel is beneficial to promoting skin wound healing. # imgabs0 #

The invention relates to the technical field of biology, in particular to a virus preservative based on sodium dehydroacetate and a preparation method and application of the virus preservative. The virus preservative based on sodium dehydroacetate is prepared from the following components in percentage by weight: 1% of sodium dehydroacetate, 1% of potassium sorbate, 0.4% of trehalose, 0.008% of thiomersalate sodium salt and the balance of deionized water. By adopting the liquid preservative, the production standard of the virus preparation is reduced, and the production cost and the technical complexity are reduced; through suitability comparison, it is found that the preservative does not affect the activity of the virus strain, and the virus titer is not reduced after 100 h. Compared with a single preservative, the preservative disclosed by the invention has the advantages that the bacteriostatic ability is stronger, microorganisms in the preparation are obviously inhibited under the room temperature condition, and the detected microbial biomass is the lowest in each group, so that the preservative disclosed by the invention has a good continuous preservative effect on viruses, and the activity of the viruses can be maintained for a longer time.

The invention discloses toy mud. The toy mud is prepared from the following components in parts by mass: 2 to 6 parts of hydroxyl guar gum, 0.5 to 2 parts of guar gum, 0.2 to 0.8 part of sodium lauryl sulfate, 0.2 to 0.8 part of phenoxyethanol, 0.2 to 0.6 part of potassium sorbate, 0.04 to 0.12 part of sodium dehydroacetate, 1 to 3 parts of silicon dioxide, 0.1 to 0.5 part of titanium dioxide, 7 to 10 parts of glycerol and 80 to 90 parts of ionized water. Compared with an existing toy mud product, the toy mud has the advantages that the hydroxyl guar gum and the guar gum are compounded for thickening, and borax crosslinking is not needed, so that the safety of the toy mud is improved; phenoxyethanol, potassium sorbate and sodium dehydroacetate are adopted for synergic preservation, and compared with a single preservative system, the shelf life of the product can be effectively prolonged; meanwhile, by doping silicon dioxide and sodium lauryl sulfate, the viscosity can be effectively reduced, and the elasticity is improved, so that the use and playing experience is improved; in addition, the working range of the toy mud can be effectively expanded by compounding the modified guar gum with the glycerol, so that the toy mud can be normally used in various temperature environments.

The invention provides a refrigerating fluid and a preparation method thereof, and a freezing method of meat products, and relates to the technical field of preservation methods of meat products, the refrigerating fluid comprises 10% (w / v) of food-grade sodium acetate, 4% (w / v) of food-grade sodium lactate, 5% (w / v) of pharmaceutical-grade propylene glycol, 2% (w / v) of sodium dehydroacetate, 1% (w / v) of sodium tin citrate, 0.5% (w / v) of natural bioactive antibacterial peptide, 3% (w / v) of food-grade potassium acetate, and RO ultrapure water: 100%. Comprising the following steps: S1, adding RO ultrapure water into a container, and gradually adding required components under a stirring condition; and S2, adjusting the pH value of the solution to 4.0-5.5. According to the refrigerating fluid, the preparation method thereof and the refrigerating method of the meat product, refrigerating fluid particles are uniformly distributed and cover the surface of the meat product without dead angles; and in cooperation with multiple innovative means such as ultralow-temperature quick freezing and layered freezing, ice crystal control and microcapsule inhibitor release, the cooling rate can be accurately controlled in each freezing stage.

The invention discloses hydrophilic polysaccharide colloid modified cold noodles and a preparation method of fresh-keeping cold noodles, and relates to the technical field of cold noodle processing. According to the method for preparing the hydrophilic polysaccharide colloid modified cold noodles, wheat flour is used as a raw material, hydrophilic colloids of different types and concentrations are added, the concentration of starch slurry is adjusted, and the cooking time of the wrappers is controlled, so that the wrappers are prepared. According to the preparation method of the fresh-keeping cold noodles, wheat flour is used as a raw material, D-sodium erythorbate with different addition amounts is added to prepare the wrappers, hydrophilic colloid is used for modifying the steamed wrappers, the hardness of the wrappers is reduced, the elasticity of the wrappers is improved, and the edible quality and the water binding capacity of the wrappers are greatly improved. D-sodium erythorbate is adopted to replace a traditional preservative (such as sodium dehydroacetate) to prepare the wrapper, and the growth of microorganisms is inhibited by using the double functions of oxidation resistance and bacteriostasis of D-sodium erythorbate. The method not only effectively prolongs the shelf life of the wrappers, but also meets the requirements of consumers on label cleaning food.

The utility model discloses a sodium dehydroacetate mother liquor recovery device which comprises a recovery box, a storage groove is formed in the bottom of the interior of the recovery box, a C-shaped table is arranged on the top of one side of the interior of the recovery box, a motor is arranged in the middle of the top of the recovery box, and a rotating rod is arranged at the output end of the motor. A rotary table is arranged at the top of the outer side of the rotary rod, and an annular filter screen is arranged at the bottom of the outer side of the rotary table; through mutual cooperation of the annular filter screen, the C-shaped table, the motor, the gear A, the gear B, the transmission assembly, the sleeve rod, the scraping rod and the transmission rod, when the device filters the sodium dehydroacetate mother liquor, the mother liquor can be filtered by continuously rotating the annular filter screen, filtered impurities can be continuously conveyed to the other side, and meanwhile, the annular filter screen is controlled to rotate, so that the impurities can be continuously conveyed to the other side. When the mother liquor is filtered, the scraping rod can be driven to rotate in the opposite direction, so that filtered crystals can be swept away, continuous filtration of the mother liquor is realized, and the recovery efficiency of the mother liquor is improved.

The invention provides a tea flower active ingredient scalp micro-ecological balance regulator and a preparation method thereof. The shampoo comprises water, sodium methyl cocoyl taurate, cocamidopropyl hydroxy sulfobetaine, octyl / decyl glucoside, sodium chloride, glycerol, phenoxyethanol, essence, PPG-3 octyl ether, cocoyl glutamic acid, sodium lauroamphoacetate, piroctone olamine salt, PEG-150 distearate, frankincense oil, panthenol, guar gum hydroxypropyl trimethyl ammonium chloride and a camellia extract. The preservative is prepared from citric acid, EDTA (Ethylene Diamine Tetraacetic Acid) disodium, benzoic acid, butanediol, tetrasodium glutamate diacetate, glycerol caprylate, dehydroacetic acid, sodium dehydroacetate, guava fruit extract and sodium surfactin. The preparation method comprises the following steps: uniformly mixing part of the components to obtain a mixed solution A, adding the camellia extract and other components, uniformly stirring to obtain a mixed solution B, and finally adding the essence, and uniformly stirring to obtain the regulator. The scalp micro-ecological balance can be adjusted, and the scalp environment can be improved.

The application discloses a kind of peroxidase / laccase-like nanoscale enzyme colorimetric / fluorescence dual-mode rapid detection sodium dehydroacetate method, the method with 1-hydroxybenzotriazole (HOBT) as organic ligand, select Cu and Zn two transition metals as central ion, Cu / Zn-MOF material is synthesized.The linear range of colorimetric mode is 0.067-12 μg / mL, and the detection limit is 0.020 μg / mL;The linear range of fluorescence mode is 0.01-22 μg / mL, and the detection limit is 0.041 μg / mL, the sensor is applied to the recovery experiment of DHA in food sample, the recovery rate is between 92.1%~106.4%, and RSD is not more than 5%, verify that the analysis method has good stability, reliability and reproducibility.

The invention belongs to the technical field of corrosion prevention and mildew removal of cigar leaves, and particularly relates to a mildew-proof solvent for cigar tobacco leaves and a fermentation mildew prevention method. The invention relates to a mildew-proof solvent for cigar tobacco leaves. The mildew-proof solvent comprises an aqueous solution; sodium dehydroacetate and / or linalool; wherein the mildew-proof solvent is used for being sprayed on the surfaces of cigar tobacco leaves; sodium dehydroacetate and linalool have a strong inhibition effect on mould, and can quickly block spore germination and hypha expansion in the early stage of mildew of tobacco leaves and reduce the formation of mildew spots; the chemical stability is high, the activity can still be kept under the conditions of high temperature and high humidity of fermentation, and the method is suitable for a long-period fermentation process; spoilage mould can be inhibited without significantly influencing the growth of dominant flora, and the synthesis of aromatic substances is prevented from being blocked.

The invention discloses a peroxidase-like / laccase nano-enzyme colorimetric / fluorescent dual-mode rapid sodium dehydroacetate detection method, which comprises the following steps: synthesizing a Cu / Zn-MOF material by taking 1-hydroxybenzotriazole (HOBT) as an organic ligand and selecting two transition metals Cu and Zn as central ions; the linear range of the colorimetric mode is 0.067-12 [mu] g / mL, and the detection limit is 0.020 [mu] g / mL; the linear range of a fluorescence mode is 0.01-22 [mu] g / mL, the detection limit is 0.041 [mu] g / mL, the sensor is applied to a standard recovery experiment of DHA in a food sample, the recovery rate is 92.1-106.4%, the RSD does not exceed 5%, and it is verified that the analysis method has good stability, reliability and reproducibility.

The application relates to the technical field of food safety detection, and particularly discloses a preparation method and a detection method of a polymer film for detecting sodium dehydroacetate. In the preparation method, ferric ammonium sulfate is used as a colorimetric agent and is encapsulated in a polymer film to prepare a polymer film doped with ferric ammonium sulfate. The detection method comprises the following steps: S1, preparing the polymer film doped with ferric ammonium sulfate; S2, cutting the prepared polymer film doped with ferric ammonium sulfate into a proper size and placing the polymer film into a centrifugal tube; S3, adding a to-be-detected solution containing unknown-concentration sodium dehydroacetate into the centrifugal tube to perform a color reaction; and S4, obtaining the concentration of the sodium dehydroacetate according to the color change caused by the color reaction in the centrifugal tube after the sodium dehydroacetate is added. When the sodium dehydroacetate content is detected, the application has the advantages of simple operation, no need of complex instruments, fast reaction time, visual observation by naked eyes and rapid detection results.

The invention belongs to the technical field of oil and gas field fracturing fluid gel breaking, and relates to a gel breaking activator, a fracturing fluid containing the gel breaking activator, and a preparation method and application of the gel breaking activator. The gel breaking activating agent is prepared from the following components in percentage by mass: 3.3 percent to 7.13 percent of triethanolamine, 6.7 percent to 8.58 percent of D-sodium erythorbate, 3.3 percent to 7.13 percent of tea polyphenol, 6.7 percent to 8.58 percent of sodium dehydroacetate, 8.58 percent to 20 percent of ethylene glycol and the balance of water. The invention also discloses a preparation method of the gel breaking activator, the raw materials are physically blended, the preparation process is simple, and the gel breaking activator can be prepared on site and is convenient to use. The invention further discloses fracturing fluid containing the gel breaking activator and application, the dosage of the gel breaking activator is small and only needs 1%-3%, and the gel breaking performance at the temperature of 20-50 DEG C is good. The problem that gel breaking of fracturing fluid is difficult when the formation temperature is lower than 50 DEG C can be solved.

The invention discloses a degradable starch-based plastic bag and a preparation method thereof, and relates to the technical field of plastic bags. The degradable starch-based plastic bag is prepared from the following raw materials in parts by mass: 40 to 60 parts of modified starch gel, 20 to 40 parts of a polylactic acid composite material, 15 to 20 parts of chitosan composite particles, 10 to 20 parts of poly (butylene adipate-co-terephthalate), 0.3 to 0.6 part of sodium dehydroacetate, 1 to 2 parts of stearic acid and 4 to 8 parts of a synergist. By introducing the modified starch gel, the polylactic acid composite material and other components, the moisture resistance and degradability of the degradable starch-based plastic bag are effectively improved; due to the introduction of the synergist prepared from the lycium ruthenicum extract, the nano montmorillonite and the chitosan quaternary ammonium salt, the moisture-proof capability, the mildew-proof capability, the mechanical property and the degradability of the degradable starch-based plastic bag are further improved. Therefore, the method has a wider application prospect.

The invention belongs to the technical field of plant protection, and particularly relates to a natural enemy insect colonic fertilizer chisodochidae granular artificial feed which comprises the following components: 150-180 parts of cereal powder, 15-20 parts of insect powder, 15-18 parts of yeast, 5-8 parts of agar, 4-6 parts of yolk, 2-5 parts of gelatin and 2-3 parts of fish meal. The feed additive is prepared from the following raw materials in parts by weight: 1-2 parts of ascorbic acid, 0.4-0.6 part of hydrochloric acid, 0.4-0.6 part of sodium dehydroacetate, 0.8-1.2 parts of riboflavin, 0.8-1.2 parts of folic acid, 0.8-1.2 parts of multivitamins, 1-3 parts of sorbic acid and 1-3 parts of benzoic acid. Various raw materials are added into the feed, so that the comprehensiveness of nutrients required by the photosynthetic fertilizer chisodochidae is ensured, the limitation of the conventional water-containing feed is broken through, and the feed is long in shelf life, resistant to storage and transportation and easy to package. The photosynthetic fertilizer chelisodochidae artificially fed by the feed disclosed by the invention has strong predation capability on noctuid pests such as spodoptera frugiperda and cotton bollworm and root maggot pests, and can be used as a natural enemy insect to prevent and control the pests.

The dipping type eyeliner pen comprises the following components in percentage by weight: 40-70% of water, 0-5% of xanthan gum, 0-5% of 1, 2, 4-trimethyl-1, 3-pentanediol monoisobutyrate, 0-5% of sodium dodecyl benzene sulfonate, 0-5% of sodium dodecyl benzene sulfonate, 0-5% of sodium dodecyl benzene sulfonate, 0 The formula comprises the following components in percentage by weight: 2%-7% of 1, 3-propylene glycol, 1%-5% of magnesium aluminum silicate, 0%-3% of aminomethyl propylene glycol, 1%-6% of acrylic acid (ester) / octyl acrylamide copolymer, 0%-3% of glycerol, 0%-3% of bis-PEG / PPG-20 / 5 PEG / PPG-20 / 5 polydimethylsiloxane, 0%-3% of methoxy PEG / PPG-25 / 4 polydimethylsiloxane, 0%-3% of caprylic acid / capric triglyceride, 0%-1% of pentaerythritol tetra (bis-tert-butyl hydroxy hydrocinnamate) ester and 10%-15% of ferric oxide toner. The adhesive comprises, by weight, 8-18% of styrene / acrylic acid (ester) copolymer, 0-1% of sodium dehydroacetate, 0-1% of phenoxyethanol and 0-1% of caprylyl glycol. The film-forming agents of the acrylic acid (ester) / octyl acrylamide copolymer and the styrene / acrylic acid (ester) copolymer are used, so that the retention capability of active ingredients on the skin can be improved, the waterproof and anti-rubbing functions are improved, and meanwhile, a super-strong and lasting effect can be formed.

The invention discloses a compounding agent for inhibiting film-forming pollution deterioration of pickled vegetables and a preparation method and application thereof.The compounding agent comprises a component A and a component B which are prepared separately, the component A is cinnamyl aldehyde nano-emulsion, and the component B is a combination of potassium sorbate and sodium dehydroacetate. The compounding agent for inhibiting the film-forming pollution deterioration of the pickled vegetables can effectively reduce the conditions of film uncut formation in the later period of fermentation of the pickled vegetables, bag expansion, deterioration and the like in the storage process, and can prolong the storage period of the pickled vegetables by 3-5 months; moreover, the use of chemical preservatives can be further reduced due to the use of the compound agent, and the compound agent has a wide application prospect.

The invention discloses a method for preparing dehydroacetic acid and sodium salt thereof through melt crystallization, and belongs to the field of chemical engineering. The method comprises the following steps: 1, preparation of a crude dehydroacetic acid product: mixing crude ketene dimer, toluene, a catalyst and a polymerization inhibitor, reacting to prepare dehydroacetic acid, and cooling and crystallizing to obtain the dehydroacetic acid crude product; 2, melting, crystallizing and purifying a crude dehydroacetic acid product, namely heating and dissolving the prepared crude dehydroacetic acid product, conveying the crude dehydroacetic acid product into a melting crystallizer, carrying out gradient cooling crystallization, heating to dissolve most crystals, and heating to 109-115 DEG C to dissolve the product, so as to obtain a dehydroacetic acid crystal; and 3, neutralizing and crystallizing to prepare sodium dehydroacetate, namely feeding the obtained dehydroacetic acid crystals into a neutralization kettle, neutralizing with a 5% sodium hydroxide solution until the pH value is 8-12, then concentrating and crystallizing, and centrifuging to obtain a sodium dehydroacetate finished product.

The invention discloses an oral medicine containing sodium dehydroacetate, which is used for treating helicobacter pylori infection. In order to solve the problems of antibiotic resistance and gastrointestinal tract microecological disorder caused by the existing quadruple therapy, free molecules of the medicine disclosed by the invention under the gastric acid condition have strong lipophilicity, can efficiently penetrate through a gastric mucous layer and bacterial cell membranes, and can cause bacterial energy depletion death by blocking tricarboxylic acid cycle and energy metabolic centers such as succinate dehydrogenase. Animal experiments prove that the curative effect of reducing Hp colonization is equivalent to or even better than that of quadruple therapy. As a non-antibiotic bacteriostatic agent, the product has the advantages that drug resistance is not easy to generate due to multi-target action, normal intestinal flora is not damaged, flora imbalance and secondary infection are effectively avoided, and the safety is obviously improved.