68results about How to "Adapt to the needs of industrial production" patented technology

The invention relates to a preparation and quality detection method of traditional Chinese medicine extract, in particular to a preparation and quality detection method of amomum para-tsaoko total flavonoids extract. The method comprises the following steps: crushing and alcohol extracting dry fruits of amomum para-tsaoko, performing reflux extraction with methanol or ethanol, concentrating, adding water, mixing, suspending, eluting by using a macroporous adsorption resin column chromatograph (ethanol-water system), concentrating, vacuum drying, and obtaining the amomum para-tsaoko total flavonoids extract. The preparation method of the amomum para-tsaoko total flavonoids extract is reasonable, stable, short in production period, and suitable for industrialized production. The invention adopts an ultraviolet-visible light spectrophotometry, a high-performance liquid-phase chromatographic one-measuring multi-evaluation method and an area normalization method to determine the content of amomum para-tsaoko total flavonoids in the amomum para-tsaoko total flavonoids extract. The method is accurate, stable, and simple in operation. The amomum para-tsaoko total flavonoids extract prepared by the invention has pharmacologic actions such as inflammation resistance, bacterial resistance and the like.

The invention discloses a preparation method of 7-hydroxy-4-methylcoumarin, comprising the following steps of: adding a certain amount of resorcinol, ethyl acetoacetate and catalyst in a flask, heat in the stirring state, filtering and removing the catalyst after the reaction is finished to obtain filtrate, evaporating and removing solvent and the excessive ethyl acetoacetate from the filtrate by using a rotary evaporator, dissolving crystals out to obtain a crude product, and recrystallizing the crude product by using 95 percent of ethanol to obtain white crystals. The process has the advantages of simple process and high efficiency and is suitable for actual production.

The invention discloses a hydrophilic modified polymer membrane. The hydrophilic modified polymer membrane is a flat sheet membrane with a porous structure and is mainly prepared through crosslinking from a polymer matrix and an amphiphilic ionizing and post-crosslinking hydrophilic copolymer, and the diameter of pores in the porous structure is in a range from nanoscale to micro scale. The invention further discloses a preparation method of the hydrophilic modified polymer membrane and an application of the hydrophilic modified polymer membrane as an oil-water separation membrane. Compared with a conventional oil-water separation membrane, the hydrophilic modified polymer membrane has the advantage that the oil-water separation flux and the antipollution property are greatly improved while excellent characteristics of the conventional oil-water separation polymer membrane are maintained; furthermore, the hydrophilic modified polymer membrane has the benefits that a preparation process is simple and controllable, preparation of a uniform and large-area amphiphilic ionic type polyelectrolyte modified porous polymer filter membrane with hydrophilicity, pollution resistance and oil-water separation capacity can be realized, the cost is low, and the hydrophilic modified polymer membrane meets the requirement of industrial production.

The invention relates to a nitrilase mutant and in particular relates to a nitrilase mutant and a coding gene thereof as well as application of the nitrilase mutant to preparation of optical activity 2-aryl propionic acid (2-APA). The mutant comprises an amino acid substitution on any one or more amino acid sites in an amino acid sequence shown as SEQ ID NO: 1, and the sites are 135, 41, 192 and 120. Compared with wild type nitrilase, the mutant has relatively high enzyme activity and/or stereoselectivity; according to the application of the nitrilase mutant to preparation of the optical activity 2-APA, the production cost can be reduced and the production efficiency can be improved when being compared with those of a chemical synthesis method; the requirements of industrial production are met.

The invention discloses a device for controlling the temperature of a mold. The mold is provided with a mold cavity and a mold frame. The device for controlling the temperature of the mold comprises an electric heating sheet, a temperature measurement element and a temperature controller, wherein the electric heating sheet is arranged in the mold cavity; the temperature measurement element is arranged in the mold cavity and used for measuring the temperature of the mold cavity; and the temperature controller is respectively connected with the electric heating sheet and the temperature measurement element to control heating of the electric heating sheet according to the temperature which is measured by the temperature measurement element. According to the device for controlling the temperature of the mold, the local quick temperature rising of a molding part of the mold can be realized, and the temperature range for operation of the mold is greatly expanded. The invention further discloses the mold having the device for controlling the temperature of the mold.

A hydrothermal synthesis of gadolinium-diethylentriaminepentaacetic acid is carried out by using gadolinium oxide and diethylentriaminepentaacetic acid, hydrothermal synthesizing, and obtaining gadolinium- diethylentriaminepentaacetic. It is an inorganic complex chemical synthetic technology. Its advantages include less impurities, high reacting speed and output efficiency.

The invention discloses a preparation method of a capsanthin feed additive with low dioxin content. According to the preparation method, commercially available capsanthin factice is further saponified, and then an acetone solvent is used for extracting, so that the dioxin content in the capsanthin factice is effectively reduced; and then the capsanthin factice and a feeding carrier are mixed uniformly, thus obtaining the capsanthin feed additive with low dioxin content. Therefore, the feeding safety of capsanthin can be improved. The preparation method fills up the research blank of the capsanthin feed additive with low dioxin content, is simple and effective and can adapt to demands of industrial production.

The invention discloses a preparation method for fermented rice row noodles and the fermented rice row noodles. The method comprises the following steps: mixing rice and water in a mass ratio of the rice to the water of 1:(1-1.5) to obtain a mixture of rice and water, performing heat preservation treatment at 25-30 DEG C for 3-5 h, performing heat preservation treatment at 35-40 DEG C for 3-5 h, and performing heat preservation treatment at 45-50 DEG C for 3-5 h to prepare a mixture of rice and water after heat preservation treatment; adding lactic acid into the mixture of rice and water afterheat preservation, adjusting the pH to 4.5-5.0, adding lactic acid bacteria, performing fermentation at 45-50 DEG C, washing rice, performing grinding to obtain pulp, performing plate-frame pressurefiltration on the obtained rice pulp, performing water washing for 2-3 times to obtain a filter cake, and performing drying to obtain special flour for the fermented rice row noodles; and adding waterinto the special flour for the fermented rice row noodles, corn starch and wheat starch, performing mixing, and performing processing to prepare the fermented rice row noodle product. The rice row noodle product has the advantages of good water reconstitution properties, a good appearance, rich elasticity, low cooking loss and a low breaking rate, has a special flavor of rice fermentation, and issuitable for industrial production.

The invention provides a method for determining a content of taurine in a solution and a method for purifying the taurine. The method comprises the steps of determining the refractive index of a to-be-detected solution, wherein the to-be-detected solution contains taurine or salt thereof and impurities, and the impurities comprise at least one of ethylene glycol, sodium isethionate, sodium sulfate and polyethylene glycol; establishing a standard curve of the taurine concentration in the taurine solution based on the refractive index; and performing optical detection on the to-be-detected solution, and determining the content of the taurine or the salt thereof in the to-be-detected solution according to the position of the obtained optical detection value in the standard curve. Through the method, the content of taurine in various taurine solutions with complex components can be effectively detected.

The invention relates to an esterase mutant and application thereof to preparation of optical active 2-aryl propionic acid (APA). The esterase mutant is obtained by carrying out amino acid mutation onone or more sites on the basis of SEQ ID NO:1; a mutation site is a 138th site and/or a 200th site. Compared with wild type esterase, the mutant has higher stereoselectivity on the basis of keeping thermal stability; compared with a chemical synthesis method, the application of the esterase mutant to the preparation of the optical active 2-APA has the advantages that the production cost can be reduced and the production efficiency is improved; the esterase mutant is adaptive to the requirements of industrial production.

The invention discloses a method for reducing the content of dioxin in capsanthin ointment. According to the method, the saponification and the solvent extraction are carried out on the commercially available capsanthin ointment to ensure that the dioxin content in capsanthin ointment products is effectively reduced and the content of capsanthin in the ointment basically remains unchanged at the same time, and therefore, the food safety is increased. The method disclosed by the invention is simple and effective and can be adapted to the requirements of industrial production.

A process for reclaiming high-temp liquid slag includes such steps as feeding the high-temp liquid slag in heater, serially connecting two plate electrodes by external water cable, electrically heating the slag to 1400-1700 deg.C and removing the water cable after the charge in heater becomes electric conductive. Its apparatus is composed of external liner, refractory corundum layer, cooling medium inlet and outlet, and plate electrodes.

The invention relates to the field of molecular biology, and particularly relates to a chimeric enzyme, application thereof in-vitro one-step reaction synthesis of Cap0mRNA and a method. The method comprises the steps that the chimeric enzyme and an in-vitro transcription template are mixed and then subjected to a co-reaction, and a capped and tailed mRNA product is obtained through a one-step reaction, wherein the chimeric enzyme comprises an RNA polymerase structural domain and a capping enzyme catalytic structural domain, and the chimeric enzyme has the dual functions of in-vitro transcription and capping through chimeric design. The method for in-vitro one-step reaction synthesis of the mRNA is developed, and the synthesis efficiency and the mRNA yield are improved.