208 results about "Sodium ascorbate" patented technology

The invention discloses a melogabalin besylate tablet and a preparation method thereof, a tablet core of the melogabalin besylate tablet comprises melogabalin besylate, a filler, a disintegrating agent, a lubricant and an antioxidant, and the antioxidant comprises sodium ascorbate. Compared with an antioxidant disclosed in the prior art, sodium ascorbate is selected as the antioxidant, so that the content of related substances in the melogabalin besylate preparation can be effectively improved, the growth of main degradation impurities and oxidation impurities is effectively controlled, the stability of the product is improved, and the product is enabled to be quickly dissolved out and good in dissolution uniformity.

The invention relates to the technical field of fused salt phase change materials, and discloses a fused salt phase change energy storage material and a preparation method and application thereof. The preparation method of the fused salt phase change energy storage material comprises the following steps: mixing NaNO3 and KNO3 according to a mass ratio of 6: 4, grinding, heating to 400 DEG C, melting, cooling, and grinding again to obtain eutectic salt; the preparation method comprises the following steps: dispersing few-layer graphene oxide and sodium ascorbate in water, and uniformly mixing to obtain slurry; performing hydro-thermal treatment on the slurry, and performing freeze drying to obtain graphene aerogel; dissolving the eutectic salt in water to prepare a saturated solution, and carrying out dipping treatment on the graphene aerogel in the saturated solution under vacuum; and freeze-drying a product subjected to dipping treatment to obtain the fused salt phase change energy storage material. According to the preparation method, the molten salt uniformly permeates pores of the graphene aerogel by adopting a vacuum impregnation method, and the infiltration angle of graphene and the molten salt is large, so that the molten salt is not easy to leak, the heat conductivity is further improved, and the heat conduction efficiency and the phase change stability are remarkably improved.

The invention relates to the technical field of pharmaceutical preparations, and particularly discloses a synthetic nicotine composition and a preparation method thereof. The nicotine buccal film agent disclosed by the invention is prepared from the following components in parts by weight: 2 to 4 parts of nicotine clathrate compound powder, 0.2 to 0.6 part of phosphatidic acid, 0.1 to 0.3 part of tannic acid, 0.1 to 0.2 part of sodium ascorbate, 0.04 to 0.06 part of tocopherol, 0.01 to 0.02 part of ethylene diamine tetraacetic acid, 2 to 4 parts of povidone and 40 to 80 parts of absolute ethyl alcohol. The synthesized nicotine composition prepared by the invention can effectively relieve the phenomenon that the faster the nicotine is released, the stronger the bitter taste is. Meanwhile, in a high-temperature and high-humidity environment, the stability of nicotine can be effectively maintained, and the oxidation half-life period of nicotine is prolonged.

The invention provides a carbon nanotube modified polypropylene composite material and a preparation method thereof, and belongs to the technical field of antibacterial materials. According to the method, plant fibers are used as precursors, carbon nanotubes are prepared through high-temperature calcination, and the carbon nanotubes are subjected to surface activation treatment by using aids such as L-cysteine hydrochloride, sodium ascorbate and ethylenediamine, so that the dispersity and interface bonding force of the carbon nanotubes in a polypropylene matrix are remarkably improved. And then, mixing the modified carbon nano tube with polypropylene, polyhydric alcohol and a catalyst, reacting, and granulating through a double-screw extruder to prepare the composite material with excellent performance. The composite material disclosed by the invention has excellent mechanical properties, thermal stability, antibacterial property and conductivity, and is suitable for the fields of automobile parts, electronic device shells, building materials, medical apparatuses and instruments and the like. The method is simple in process, environment-friendly and efficient, renewable resources are fully utilized, and the method has a wide industrial application prospect.

The invention discloses ice glazing liquid for ice glazing of mussels. The ice glazing liquid is prepared from the following components in percentage by mass: 0.1 to 0.12 percent of sodium polyacrylate, 0.05 to 0.07 percent of sodium erythorbate, 0.01 to 0.03 percent of citric acid, 1 to 1.2 percent of sodium lactate, 0.4 to 0.6 percent of alginate oligosaccharide, 0.1 to 0.12 percent of xanthan gum, 7 to 9 percent of propylene glycol and the balance of water. The ice glaze liquid for ice glaze plating of the mussels is reasonable in compatibility, simple and easily available in components and good in adhesiveness, the formed ice glaze is not easy to crack, the dry loss rate can be reduced, and the quality of the thawed mussels can be ensured. The invention further provides a preparation method of the ice glaze liquid for ice glaze plating of the mussels. The preparation method is simple in process step, high in operability and uniform in component dispersion.

The invention discloses a bifidobacterium pseudocatenum freeze-drying protective additive and application, and the bifidobacterium pseudocatenum freeze-drying protective additive is prepared from the following raw materials in percentage by weight: 2%-10% of dried skim milk, 5%-20% of cane sugar, 1%-6% of fructo-oligosaccharide, 0.5%-3% of sodium glutamate, 0.5%-2% of sodium ascorbate, 3%-15% of betaine and the balance of distilled water. The freeze-drying protective agent is simple in component composition, the survival rate of the bifidobacterium pseudocatenum in the freeze-drying process can be increased by using the freeze-drying protective agent, the freeze-drying survival rate of the bifidobacterium pseudocatenum reaches 76.3% or above, the stability of the freeze-drying preparation is guaranteed, and meanwhile the obtained freeze-drying preparation has the advantages of being easy to operate and the like, and has good application prospects. The preparation method of the freeze-dried preparation is simple and feasible, mild in condition, good in reproducibility, strong in controllability, suitable for large-scale production, and more convenient for clinical use and storage.

The invention relates to the technical field of separation and purification, in particular to a purification method of eugenol, which comprises the following steps: (a) dissolving crude eugenol in an ethanol aqueous solution to prepare a solution with eugenol mass concentration of 20-30%; (b) adding a composite protective agent into the solution, uniformly stirring and standing to obtain a mixed solution, the composite protective agent comprising modified chitosan, sodium ascorbate and nano-silica; (c) carrying out reduced pressure evaporation on the mixed solution, and recovering the solvent to obtain a concentrated solution; (d) adding the concentrated solution into a glycine aqueous solution with the mass concentration of 1-2%, uniformly stirring and standing; and (e) carrying out segmented temperature control rectification on the concentrated solution treated in the step (d), and collecting a target fraction to obtain the high-purity eugenol. By introducing a novel protective agent system and a staged temperature control rectification technology, the occurrence rate of thermal decomposition and oxidation reaction is remarkably reduced, and the product purity and the production efficiency are improved.

The present application relates to a glass mildew-proof isolation powder and a preparation method thereof. The components of the glass mildew-proof isolation powder include: soluble starch, potassium sorbate, sodium ascorbate and an antiseptic water absorbent; the antiseptic water absorbent includes at least one of boric acid, polybasic organic acid and polybasic organic acid salt. Soluble starch can isolate and protect the glass surface, potassium sorbate can play a role in inhibiting bacteria and mildew, sodium ascorbate can inhibit the weathering of the glass surface, and the addition of an antiseptic water absorbent composed of at least one of boric acid, polybasic organic acid and polybasic organic acid salt can play a role in preventing corrosion of the glass surface, which is conducive to absorbing moisture in the air and preventing moisture from weathering the glass surface. Furthermore, it can also form a synergistic effect with sodium ascorbate to enhance the effects of anti-oxidation, inhibiting mold growth, and preventing oxidation and weathering of the glass surface.

The invention discloses a vitamin D3 clathrate compound and a preparation method thereof, and further discloses a calcium carbonate D3 tablet containing the vitamin D3 clathrate compound and a preparation method of the calcium carbonate D3 tablet. The vitamin D3 inclusion compound disclosed by the invention comprises the following components in percentage by mass: 0.05-0.75% of vitamin D3; 80.00 to 99.5 percent of hydroxypropyl-beta-cyclodextrin, and the balance of water; 1.00% to 10.00% of an antioxidant; 0.00 to 5.00% of an anti-sticking agent; wherein the antioxidant is butylated hydroxytoluene (BHT), vitamin E and sodium ascorbate. The invention also provides a preparation method of the vitamin D3 clathrate compound. The preparation method comprises the following steps: dissolving the vitamin D3 and the antioxidant in ethanol; the preparation method comprises the following steps: dissolving hydroxypropyl-beta-cyclodextrin in purified water, and then adding an anti-sticking agent; mixing the two solutions; and drying by using a spray dryer to prepare the vitamin D3 inclusion compound. The vitamin D3 inclusion compound prepared by the invention is high in inclusion rate and yield and can be stably stored for a long time, and a preparation (such as a calcium carbonate D3 tablet) prepared from the inclusion compound meets medicinal requirements, and is good in long-term stability, high in uniformity, simple to prepare and relatively low in cost.

The invention belongs to the technical field of food and medicine, and relates to application of corn germ concentrated powder in improvement of osteoarthritis. The invention particularly relates to application of corn germ concentrated powder, namely corn antioxidant multienzyme, in preparation of medicines or health-care foods for treating rheumatoid arthritis and osteoporosis. In the corn germ concentrated powder, superoxide dismutase / (U / g) is greater than or equal to 8500, glutathione peroxidase / (U / g) is greater than or equal to 5000, and catalase / (U / g) is greater than or equal to 750. The corn germ concentrated powder can also be prepared by the following method: cleaning corn, germinating, adding water into the germinated corn, grinding and pulping, adding a settling agent into the corn steep liquor, standing, taking supernate, adding part of sodium ascorbate, performing temperature-controlled concentration, adding the rest sodium ascorbate and a stabilizer into the concentrated solution, and uniformly mixing to obtain the corn germ concentrated powder. And drying at controlled temperature, crushing, and mixing with a proper amount of silicon dioxide. The prepared corn germ concentrated powder has the effect of resisting rheumatoid arthritis.

The present disclosure provides a high-energy, low toxicity radiopharmaceutical composition comprising actinium that performs as an anti-tumor agent for targeted radionuclide therapy and has improved shelf-life stability. Specifically, the radiopharmaceutical composition may include 225Ac-PSMA I&T, sodium ascorbate, and optionally hydrochloric acid. The radiopharmaceutical composition may be suitable for administration to a patient in need thereof, such as for the purpose of treating prostate cancer.

Topical compositions comprise at least one hydrophilic antioxidant, wherein the at least one hydrophilic antioxidant comprises sodium ascorbate; a hydrophobic antioxidant; and an enzymatic antioxidant. Topical compositions according to the present disclosure may be used to treat skin (e.g, by reducing the effects of UV exposure or aging on skin), to stimulate or preserve elastogenesis in skin, to stimulate or preserve collagenesis in skin, to stimulate or preserve production of elastin and collagen in skin, to reduce the amount of ROS in skin, to improve the appearance of skin, or to reduce the appearance of fine lines, wrinkles, or crepiness in skin. Topical compositions comprising sodium ascorbate and lactoferrin synergistically enhance elastogenesis in skin, while preserving CD44 expression in skin, relative to compositions comprising sodium ascorbate without lactoferrin.

The invention discloses food-grade metal surface blackening liquid as well as a blackening process and application. The blackening liquid comprises a basic blackening component and a modified graphene solution, wherein the basic blackening liquid comprises 15-25 g / L of sodium pyrophosphate, 8-12 g / L of sodium molybdate, 20-30 g / L of sodium gluconate, 2-5 g / L of sodium erythorbate, a citric acid / sodium citrate buffer solution, 10-15 ml / L of polyethylene glycol and 0.5-1 ml / L of polysorbate 80; the modified graphene is PEI modified graphene oxide. According to the method, stubborn dirt is cleaned and peeled off through ultrasonic waves, and grease is degraded through photocatalysis of nano TiO2, so that the surface hydrophilicity is improved, and the adsorption uniformity of blackening liquid is enhanced; according to the method, Si-O-Si network crosslinking is optimized through staged heating (80 DEG C to 120 DEG C to 140 DEG C), the hardness and the adhesive force are improved, thermal stress concentration in a traditional process is avoided, meanwhile, raw material decomposition can be avoided at the temperature, and the safety of blackening liquid is further guaranteed.

The invention belongs to the technical field of metallurgy, and relates to a comprehensive recovery method for antimony-containing gold concentrate, which comprises the following steps: S1, mixing antimony-containing gold concentrate and an antioxidant, carrying out size mixing, then adding sodium sulfide and sodium hydroxide to obtain a size, and reacting to obtain a leaching solution and leaching residues; s2, the leachate obtained in the step S1 is subjected to electrodeposition, and crude antimony and barren liquor are obtained; wherein in the step S1, the antioxidant is a mixture of sodium ascorbate and ethylenediamine tetraacetic acid disodium salt. According to the method, the antimony-containing gold concentrate is subjected to antimony leaching through Na2S under the alkaline condition, in order to avoid gold loss caused by the fact that S < 2-> is oxidized into S < x > < 2-> and then the S < x > < 2-> and Au generate AuSx dissolved in an alkaline solution in the leaching process, an antioxidant is added in the leaching process, leaching of gold in the antimony-containing gold concentrate can be remarkably reduced, and the recovery rate of gold is increased.

The invention relates to the technical field of preparation of composite pigments, in particular to a preparation method of a high-temperature-resistant photolysis-resistant composite pigment and application of the high-temperature-resistant photolysis-resistant composite pigment in meat products. According to the technical scheme, the method comprises the following steps: preparing the following raw materials in parts by weight: pigment base materials: 5-18 parts of monascus red pigment, 4-12 parts of high-color-value capsanthin and 3-8 parts of beta-cyclodextrin embedded curcumin; the component A comprises the following components in parts by weight: 1-5 parts of ascorbyl palmitate, 2-8 parts of polyglycerol fatty acid ester, 0.5-3 parts of L-sodium ascorbate and 0.1-1.5 parts of nano titanium dioxide; and 1 to 4 parts of N-acetyl-L-cysteine. The ultra-high stability of the natural pigment under the conditions of high-temperature processing and strong light irradiation is realized, the processing tolerance and the final color development effect are balanced, the problem of uneven dyeing caused by early release of the traditional pigment is solved, the product quality and the application convenience are improved, and the unification of safety and efficacy is realized.

The invention discloses a preparation method of a modified MXene / epoxy resin composite anticorrosive coating, and belongs to the technical field of anticorrosive coating materials. The preparation method disclosed by the invention comprises the following steps: (1) mixing an L-sodium erythorbate solution with an MXene dispersion liquid to obtain L-sodium erythorbate / MXene powder; (2) adding acetone into epoxy resin for dilution to obtain an epoxy resin solution; the preparation method comprises the following steps: adding L-sodium erythorbate / MXene powder into DMF (Dimethyl Formamide) to obtain an L-sodium erythorbate / MXene dispersion liquid; and adding glycidyl methacrylate, a flatting agent and 650 low-molecular polyamide to obtain the composite anticorrosive paint. MXene is modified by L-sodium ascorbate, so that the dispersity of MXene in epoxy resin is improved, a layer-by-layer stacked densified structure is formed in the epoxy anticorrosive coating, holes formed after solvent volatilization are reduced, the transmission path of a corrosive medium is increased, the shielding effect is effectively formed, and the anticorrosive performance is improved.

The invention relates to the technical field of grease powder preparation, and provides a preparation method of functional vegetable grease powder, which comprises the following steps: carrying out micro-capsule embedding on plant seed oil by taking sodium caseinate, octenyl succinic acid modified starch and isomaltooligosacharide as wall materials, and adding sodium ascorbate to improve the oxidation resistance. Finally, micro-capsule oil powder is obtained through spray drying, the embedding rate of the vegetable oil capsule powder is greatly improved through the obtained product, and therefore the storage time of the vegetable oil capsule powder is greatly prolonged.

The invention relates to the field of medicines, and discloses slow-release composite powder for removing nitrite and a preparation method thereof, and the slow-release composite powder comprises the following raw materials: bovine bone collagen peptide, sorbitol, L-sodium ascorbate, L-alanine composite powder, vitamin E, earthworm protein, natto powder, cranberry powder and magnesium stearate. Wherein the L-alanine composite powder is prepared from L-alanine, y-aminobutyric acid and L-glutamic acid; according to the present invention, the L-alanine composite powder and the active substance can chemically react with the nitrite in the body so as to convert the nitrite into the safe substance to be discharged out of the body, such that the absorption and the adsorption of the nitrite can be easily reduced, and the formation of the nitrite in the digestive tract can be reduced so as to reduce the concentration of the nitrite in the body; and nitrite is directly prevented from being accumulated to the level of potential health hazards.

The invention belongs to the technical field of seasoning processing, and particularly discloses salad dressing capable of improving the stability of natural pigments and a preparation method of the salad dressing. The salad dressing capable of improving the stability of the natural pigment comprises the following raw materials: high fructose corn syrup, yolk liquid, white granulated sugar, potassium sorbate, lemon concentrated juice, table vinegar, water, glycerol, the natural pigment, titanium dioxide, sucrose fatty acid ester, edible salt, xanthan gum, soybean oil, acetylated distarch adipate, sodium ascorbate, mustard powder and a rosemary extract. The HLB (Hydrophile Lipophile Balance) value of the sucrose fatty acid ester is The synergistic effect of all the components is remarkable, multiple defense lines of oxidation resistance, system stability, corrosion prevention and the like are constructed, and the probability of natural pigment fading in the salad dressing storage process is reduced.

The invention relates to a making method of a daylily instant vegetable bag, and belongs to the technical field of food processing. The convenient vegetable bag is prepared by taking dried daylily as a raw material and supplementing with seasonings in an accurate ratio through a series of processing steps. The nutritional ingredients of the day lily are reserved, the flavor is improved through careful seasoning, and vacuum packaging is adopted, so that the day lily is convenient to store and eat. The product can be eaten after the bag is opened and can also be eaten after being heated, and the requirement for convenient and healthy food in the modern fast-paced life is met. Based on the dry weight of the day lily, the condiment comprises the following components in percentage by weight: 1 to 3 percent of white sugar, 2 to 3 percent of monosodium glutamate, 0.01 to 0.1 percent of disodium 5 '-ribonucleotide (I + G), 0.050.1 percent of D-sodium erythorbate, 1 to 2.5 percent of table salt, 0.04 to 0.08 percent of citric acid, 0.01 to 0.03 percent of glacial acetic acid, 0.05 to 0.012 percent of lactic acid, 0.005 to 0.01 percent of potassium sorbate, 0.001 to 0.01 percent of sodium pyrosulfite, 0.1 to 0.3 percent of garlic flavor powder, 0.5 to 1 percent of spicy flavor powder and 0.5 to 1 percent of beef flavor powder. The seasoning is prepared from the following raw materials in percentage by weight: 0.5 to 1 percent of strong-fragrance spicy oil, 1 to 3 percent of red oil, 0.001 to 0.015 percent of 10 percent chilli extract, 0.001 to 0.15 percent of capsanthin, 0.05 to 1 percent of beef-flavor essence paste and 2 to 2.5 percent of spicy essence paste.

The invention relates to the field of functional food engineering, in particular to low-protein and high-energy baked food as well as a preparation method and application thereof. The low-protein and high-energy baked food is prepared from the following raw materials by mass: 15 to 25 g of sweet potato starch, 15 to 25 g of corn starch, 15 to 25 g of potato starch, 15 to 25 g of pea starch, 35 to 45 g of eggs, 4 to 6 g of corn oil, 8 to 12 g of linseed oil, 0.5 to 1.2 g of haematococcus pluvialis powder, 0.1 to 0.3 g of sodium ascorbate, 15 to 25 g of milk, 10 to 14 g of carrot juice, 18 to 24 g of tomato juice, 5 to 8 g of cane sugar and 5 to 8 g of a flavoring agent. The product disclosed by the invention is relatively low in cost, low in protein and high in energy, adopts different fillings to improve the taste, and has a health-care effect aiming at patients with nephropathy.

The invention relates to the technical field of preparation of health-care products, in particular to a fat-soluble component nano-emulsion and a preparation method thereof. The preparation method comprises the following steps: stirring and dissolving the antioxidant and the caprylic / capric triglyceride, adding the vitamin D3 and the retinyl palmitate, and stirring and dissolving to obtain an oil phase; stirring the starch sodium octenylsuccinate in purified water until the starch sodium octenylsuccinate is dissolved, adding glycerol, and uniformly stirring and mixing to obtain a water phase; adding a small amount of water phase into the oil phase, and stirring at high speed to obtain primary emulsion; adding the primary emulsion into the residual water phase, stirring at a high speed, shearing and homogenizing to obtain a nano embedding emulsion; adding citric acid, cane sugar and sodium ascorbate into purified water, adding the nano embedding emulsion, and uniformly stirring to obtain a concentrated solution; and diluting the concentrated solution and adjusting the pH value to obtain the fat-soluble component nano-emulsion. The fat-soluble component nano-emulsion provided by the invention has good safety; the product can be easily absorbed and utilized by a human body, and is convenient for people to quickly supplement vitamin A and vitamin D3 required by the body.

This invention belongs to the field of crop cultivation technology, specifically relating to a rice nano-flavor enhancer and its application in rice cultivation. The rice nano-flavor enhancer of this invention is prepared from raw materials such as sodium octenyl succinate starch, sodium ascorbate, and sodium selenite. The prepared octenyl succinate starch-nano-selenium has advantages such as small nanoparticle size and system stability. This flavor enhancer can not only significantly improve the overall aroma of fragrant rice, but also enhance the aroma of non-fragrant rice. Specifically, it can significantly increase the content of volatile aroma compounds such as 2-acetyl-1-pyrroline (2-AP) in fragrant rice grains, and significantly increase the content of volatile aroma compounds such as vanillin, benzaldehyde, and geranylacetone in non-fragrant rice grains. Unlike traditional rice flavor enhancers, the rice nano-flavor enhancer of this invention has better applicability and a wider range of applications, helping to meet the growing market demand for high-quality rice.

The invention provides a method for detecting fusion of extracellular vesicles by adopting fluorescence resonance energy transfer, and belongs to the technical field of extracellular vesicles. A dynamic fluorescence monitoring system is established, low-power laser excitation is adopted, dual-wavelength fluorescence signals are monitored at the same time, fluorescence signal data are collected, graded gain regulation and control processing is carried out through five threshold values, and a fluorescence signal super-sparse matrix is constructed; establishing a fluorescence signal processing matrix model, converting the super-sparse matrix into a dense matrix, constructing a gain matrix for signal correction, calculating a fluorescence resonance energy transfer efficiency parameter, obtaining a standardized efficiency value through matrix operation, outputting an extracellular vesicle fusion kinetic analysis result, and establishing a quantitative evaluation system. The technical problems of poor signal stability and low detection precision in the process of fluorescence resonance energy transfer detection of extracellular vesicle fusion are solved.

The invention discloses a composite water-soluble immunologic adjuvant and a preparation method thereof. The composite water-soluble immunologic adjuvant is prepared from the following components in parts by weight: 18-22 parts of phosphate buffer salt solution dry powder, 1-3 parts of sodium ascorbate, 8-12 parts of beta-glucan, 4-8 parts of xanthan gum and carrageenan mixture, 8-14 parts of plant extract, 2-5 parts of plant polysaccharide and 1930-1960 parts of ultrapure water. According to the adjuvant, the problem that a specific antibody is generated for the adjuvant is effectively avoided, the detection rate of positive clone is remarkably increased, and the possibility of obtaining a high-quality paired antibody is increased. The mixing process of the adjuvant and the water-soluble antigen is simple and does not need emulsification. The native conformation of the antigen is retained, and the generation of antibodies aiming at conformation-dependent epitopes is facilitated. Compared with traditional Freund's adjuvants and incomplete Freund's adjuvants, the composite water-soluble adjuvant has the advantages that the use amount of antigens is small, the immune cycle is shortened, efficient immune response and antibody generation can be quickly stimulated, and the composite water-soluble adjuvant has remarkable competitive advantages.

The invention relates to the field of food production processes, and discloses a raw luncheon meat packaging production method which comprises the following steps: uniformly mixing table salt, phosphate, vegetable protein, sugar, white pepper, isomeric sodium ascorbate, fresh-increasing seasoning and part of water, pouring the mixture and lean meat into a vacuum tumbling machine, performing forward tumbling for 10-10 minutes at the rotating speed of 18 revolutions per minute, controlling the temperature to be 5 DEG C, and performing vacuum tumbling for 10-20 minutes at the rotating speed of 18 revolutions per minute; the vacuum degree is more than 95%; then adding the fat meat, the modified starch and the rest water into a vacuum tumbling machine, reversely tumbling for 15 minutes at the rotating speed of 18 revolutions per minute, controlling the temperature to be 5 DEG C and the vacuum degree to be more than 95%; starting a beating mode of the vacuum tumbling machine after two times of tumbling is completed, performing forward rotation for 1-10 minutes, then performing reverse rotation for 1-2 minutes, and ending after 10-60 minutes; a step-by-step dynamic rolling process is adopted, a protein step-by-step activation technology is initiated, and the technical problems that in the prior art, a raw loading process is poor in forming effect, the meat is loose, and the taste is not compact enough are solved.

The invention relates to the technical field of thin-layer chromatography detection, and discloses a thin-layer chromatography separation method for amino polyether and a matrix in a fluorine-18 labeled radiopharmaceutical, and the adopted developing solvent is acetonitrile and ammonia water, and the volume ratio of the acetonitrile to the ammonia water is 90: 10-85: 15. According to the method, amino polyether and matrix components are separated by adopting a developing solvent with a specific volume ratio, and particularly, sodium ascorbate in the amino polyether and the matrix is separated.

The present disclosure provides a high-energy, low toxicity radiopharmaceutical composition comprising actinium that performs as an anti-tumor agent for targeted radionuclide therapy and has improved shelf-life stability. Specifically, the radiopharmaceutical composition may include 225Ac-PSMA I&T, sodium ascorbate, and optionally hydrochloric acid. The radiopharmaceutical composition may be suitable for administration to a patient in need thereof, such as for the purpose of treating prostate cancer.

The invention discloses a vacuum color protection method of preserved apples, which comprises the following steps: peeling apples, removing kernels, and cutting the apples into apple slices; soaking the apple slices in a composite color-protecting solution, performing vacuum-pumping treatment, and continuing soaking to obtain the preserved apples subjected to color-protecting treatment; the composite color protection liquid is composed of citric acid, sodium erythorbate, sodium chloride, calcium chloride and water, the concentration of the citric acid is 3-6%, the concentration of the sodium erythorbate is 0.3-0.5%, and the concentration of the sodium chloride is 0.3-0.5%. The color fixative disclosed by the invention is combined with a vacuum mode, so that a greater benefit effect is exerted, and the color protection effect is improved under the condition that the water activity is not influenced. The method is simple in process and convenient to operate, toxic and harmful chemicals are not added, and the method has wide application and popularization prospects.

The utility model belongs to the technical field of dosing devices, and particularly relates to an automatic preparing and dosing system for a sodium erythorbate deoxidant. Comprising a sodium erythorbate storage tank, a preparation tank, a dosing pump, a deaerator and a water feeding pump which are connected in sequence, a top outlet of the sodium erythorbate storage tank is connected with a pressure relief pipeline, the pressure relief pipeline is provided with a back flushing type filter, a bottom outlet of the sodium erythorbate storage tank is connected with an electric rotary feeding valve and a weighing sensor, and the weighing sensor is connected with the sodium erythorbate storage tank. The preparation tank is connected with a desalted water pipeline; an online dissolved oxygen analyzer is arranged at an outlet of the deaerator; an outlet of the nitrogen pipeline is respectively connected with inlet pipelines of the back flushing type filter, the sodium erythorbate storage tank and the preparation tank through pipelines; a control system is further included. And through precise control, the deoxygenation requirement is met. On-line monitoring and automatic adjustment are combined, the dissolved oxygen index is stabilized within the preset range, fluctuation caused by manual adjustment is effectively avoided, the running stability of a downstream boiler is remarkably improved, and meanwhile the working efficiency is improved.