10 results about "Sodium erythorbate" patented technology

This invention relates to the field of food processing technology, specifically to a deep-processing material for hollow fruits and vegetables and its application method. The deep-processing material for hollow fruits and vegetables is characterized by comprising a pretreatment solution, a color-protecting, hardening, and antioxidant solution, and a filling material; the pretreatment solution is a citric acid solution with a mass concentration of 0.1%-0.3%; the color-protecting, hardening, and antioxidant solution contains 0.01%-0.5% sodium hexametaphosphate, 0.1%-0.3% citric acid, 0.01%-0.1% sodium isoascorbate, and 0.1%-0.5% calcium salt, wherein the calcium salt is calcium chloride or calcium lactate. The beneficial effects of this invention are: the deep-processing material has a reasonable composition; the pretreatment solution can initially protect fruits and vegetables; the color-protecting, hardening, and antioxidant solution can effectively improve the color and hardness of processed fruits and vegetables and delay oxidation; and the filling material can flexibly adjust flavor and nutrition to achieve diversified combinations. The resulting hollowed-out fruit and vegetable products have a great taste and an appealing appearance, and can achieve a combination of various fruit and vegetable flavors, enriching the variety of fruit and vegetable products and meeting different consumer needs.

The application discloses a kind of for nuclear power plant two loop systems chemical cleaning agent and cleaning method, belong to nuclear power plant equipment chemical cleaning technical field.The cleaning agent is by cleaning main agent ethylenediaminetetraacetic acid, cleaning auxiliary agent (citric acid and / or glycollic acid), corrosion inhibitor N-108, pH regulator ammonia water, reducing agent (hydrazine hydrate or D-sodium isoascorbate), organic silicon defoaming agent and solvent (deionized water or desalted water) compound is formed.The cleaning agent cleaning stage is carried out at pH 5.5~6.5, temperature 110~130 DEG C;Passivation stage is completed by supplementing ammonia water at pH 8.5~9.5, temperature 80~95 DEG C.The cleaning agent of the application has high dissolution rate (up to 96.5%) to common scale type such as Fe3O4, has very low corrosion rate (<0.005 g / m 2 ·h) to austenitic stainless steel and nickel-based alloy, and seamless conversion of cleaning and passivation can be realized by pH adjustment, the operation process is simple, the waste liquid amount is less, the environmental protection is good, and the safety, efficient operation of nuclear power unit two loop system can be effectively guaranteed.

The present application relates to the technical field of food processing, and particularly refers to a fruit pulp color protection formula and a processing method thereof. The color protection liquid formula provided by the present application comprises the following components in percentage by mass: 0.05%-0.25% of citric acid, which is used to adjust the pH value of the color protection liquid and create a suitable color protection environment; 0.01%-0.1% of sodium erythorbate, which is used to play an antioxidant role and reduce the oxidation and browning of fruit pulp; and 0.05%-0.5% of calcium chloride, which is used to enhance the stability of the cell wall structure of fruit pulp and reduce the loss of color and luster. The present application has the following beneficial effects: excellent color protection effect: the components in the color protection liquid formula of the present application can synergistically inhibit the oxidation and enzymatic browning of fruit pulp, significantly improve the color stability of fruit pulp, and prolong the shelf life of products; convenient operation: the processing method has clear steps and does not require complex equipment, which is convenient for large-scale production and promotion and reduces the production cost of enterprises; wide applicability: the present application is suitable for various fresh fruit pulp and thawed frozen fruit pulp, and can meet the processing needs of different foods such as fruit jelly and fruit beverage, and has high practical value.

The application provides an alcohol-free and proteinase K-free nucleic acid extraction reagent and a nucleic acid rapid extraction method, and relates to the technical field of molecules.The extraction reagent comprises a lysis solution, and the lysis solution comprises guanidine isothiocyanate with a molar concentration of 2-4 M, a thiol reducing agent with a volume fraction of 1%-5% v / v, sodium erythorbate with a mass fraction of 0.02%-0.5% w / v and a surfactant with a mass fraction of 1%-10% w / v; and the lysis solution has a pH of 7-8.5.The lysis solution can be stably stored at room temperature for a long time; in application, only one washing solution is matched, one-step washing is performed, the complexity of nucleic acid extraction can be reduced, and the extraction time is shortened; and the lysis solution does not contain alcohol reagents, and there is no need to dry before nucleic acid elution.The technical problems that, in the prior art, the lysis solution has complex components, proteinase K needs to be matched, many impurities are introduced, multiple washing is needed, the steps are complicated, and a long time is consumed are solved.

The application belongs to the technical field of anti-swelling agent preparation, and particularly relates to a fracturing anti-swelling agent and a preparation method thereof. The fracturing anti-swelling agent is prepared by taking cationic quaternary ammonium salt, hexadecyl dimethyl benzyl ammonium chloride and dimethyl octadecyl [3-(trimethoxysilyl) propyl] ammonium chloride as main anti-swelling components, adding tetrasodium iminodisuccinate to complex metal ions in formation water, taking isomeric tridecanol polyoxyethylene ether as a penetrating component, taking perfluorohexyl ethanol polyoxyethylene ether as a cleanup component, taking sodium D-erythorbate as an antioxidant component, and adding triethanolamine to adjust the alkalinity of the system, so that the raw materials synergize with each other, and the prepared fracturing anti-swelling agent has good anti-swelling rate and water washing resistance.

This invention relates to a method for improving the histamine degradation efficiency of Pichia gondii based on redox potential regulation. The method includes the following steps: (1) culturing Pichia gondii into a seed culture; (2) constructing the fermentation system: adding glucose, polyether defoaming agent, sodium isoascorbate, and histamine to 1×PBS; the liquid volume is 1L / 2L, the fermentation temperature is 37℃, and the rotor speed is 600rpm; (3) inoculating the seed culture into the constructed fermentation system and controlling the OD of the fermentation system. 600 =0.1; (4) Use a depolarization ORP detector to monitor the ORP signal of the fermentation system in real time, introduce sterile air into the fermentation system, and adjust the air volume to maintain the ORP at 420 mV until the histamine content in the fermentation system is reduced to the target value or below. This method is simple to operate, does not require gene editing of the strain, and does not introduce other reagents, and has a very broad application prospect.

The present application relates to water treatment agent preparation technical field, disclose a kind of river and lake water spongy target killing composite microbial growth-promoting agent preparation method, the method includes: preparation includes sodium percarbonate, L-glutamic acid-N,N-diacetic acid tetrasodium and polyaspartic acid granule A;Preparation includes humic acid sodium, adipic acid, sodium erythorbic acid and ferric citrate granule B;Granule A and granule B are jointly put into mixing machine and mixed uniformly, after discharging, vacuum sealing packaging is carried out.The present application realizes the physical isolation of oxidizing agent and reducing agent by extruding granulation respectively, to avoid the early failure of agent during storage period.After input into water body, the difference in physical strength of two types of granules is used to realize time sequence disintegration, granule A disintegrates first to build alkaline de-crosslinking environment to strip water spongy defense layer, and granule B disintegrates subsequently to make microenvironment drift to weak acidity, trigger fenton-like reaction to release hydroxyl radical to complete targeted killing, and oxygen release and carbon and nitrogen source dissolution can promote water bottom micro-ecosystem reconstruction.

This invention provides a compound ice coating liquid for frozen preservation of mussels and its preparation method. The preparation method of the compound ice coating liquid for frozen preservation of mussels includes the following steps: mixing sodium isoascorbate, alginate oligosaccharide, and a positively charged wall material in a solvent, followed by high-pressure homogenization to obtain an inner active emulsion with droplet size distribution between 120 nm and 180 nm and a Zeta potential of +15 mV to +30 mV; wherein the positively charged wall material is a compound of soy protein isolate and chitosan, with a mass ratio of soy protein isolate to chitosan of 9:1; and mixing sodium polyacrylate and citric acid in a solvent to obtain an outer shielding gel. This invention achieves high crack resistance in the ice coating for frozen preservation of mussels, deep penetration of preservative components, and high stability of the emulsion.

This application relates to the technical field of metal surface treatment technology, specifically disclosing a phosphorus-free, highly efficient, and biodegradable neutral rust remover and its preparation method. The phosphorus-free, highly efficient, and biodegradable neutral rust remover comprises the following components by weight percentage: 15-30% phosphorus-free complexing agent; 1-3% organic acid; 3-5% sodium isoascorbate; 5-10% flash rust inhibitor; 2-5% corrosion inhibitor; 1-3% surfactant; and water. Through a multi-mechanism synergistic effect of "reduction-complexation-stripping," sodium isoascorbate is used to remove sparingly soluble Fe... 3+ Reduced to readily soluble Fe 2+ It creates dissolution channels, and then the complexing agent strongly chelates and dissolves the rust, achieving highly efficient rust removal without using any phosphorus / fluorine-containing substances. The rust removal rate is increased by 2-3 times, and it can effectively prevent rust from returning. At the same time, by compounding special corrosion inhibitors, it can protect multiple metals such as steel, iron, aluminum, and copper without corrosion.

The application discloses an alcohol-resistant and antioxidant double-shell fresh-keeping microcapsule, which is composed of a core material, a double-layer wall material, a pH buffer and a composite antioxidant; the double-layer wall material comprises an inner alcohol-resistant wall material and an outer acid-resistant wall material; the inner compact embedding wall material is composed of OSA modified starch, gum arabic, beta-cyclodextrin and separated whey protein; the outer alcohol-resistant and acid-resistant protective wall material is composed of HPMC, sodium alginate, a compound stabilizer and maltodextrin; the pH buffer is formed by compounding sodium citrate and sodium phytate at a mass ratio of 2:1; and the composite antioxidant is formed by compounding vitamin C and sodium erythorbate at a mass ratio of 1:1. Compared with the prior art, the application has the advantages that a multi-scene universal alcohol-resistant and antioxidant double-shell fresh-keeping microcapsule, a preparation method and application thereof are provided.