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288results about How to "Lower protein content" patented technology

Low-protein low-fish meal feed for Litopenaeus vannamei

The invention discloses a low-protein low-fish meal feed for Litopenaeus vannamei. The content of proteins in a Litopenaeus vannamei feed is reduced by supplementing exogenous methionine, the content of fish meal in the feed is reduced by utilizing bean pulp with plant protein sources and peanut meal, and then the exogenous methionine, the bean pulp and plant protein sources and other raw materials are mixed according to a reasonable proportion to form the low-protein low-fish meal feed for the Litopenaeus vannamei. The using amount of the fish meal in the feed is reduced to be less than 10 percent to the maximum extent, and the problem that amino acid is unbalanced in a single protein source is solved by adding a plurality of kinds of plant protein sources. The content of the fish meal and the content of the proteins in the Litopenaeus vannamei feed are remarkably reduced, and the feed is favorable for reducing the cost, improves the utilization rate of the feed, and reduces the discharge of nitrogen and phosphorus in the aquaculture process so as to reduce environmental pollution. Through feeding experiments for a long time, the results show that when the Litopenaeus vannamei is fed by using the low-protein low-fish meal feed for the Litopenaeus vannamei, the feed has no adverse effect on the growth performance and feed coefficient of the Litopenaeus vannamei, and the discharge amount of nitrogen and phosphorus in water bodies can also be reduced.
Owner:广东省农业科学院畜牧研究所 +1

Auxiliary extraction method of biological enzyme for improving dissolution rate of dendrobe bioactive polysaccharide

The invention discloses an auxiliary extraction method of biological enzyme for improving the dissolution rate of dendrobe bioactive polysaccharide, which is used for auxiliary extracting of the dendrobe polysaccharide by various biological enzymes of which the most proper pH is close to be neutral in a compounding way step by step. The auxiliary extraction method comprises the following steps of: firstly selecting cellulose, xylanase and pectinase to decompose substances of dendrobe cell wall, i.e. cellulose, hemicellulose, pectin substance, decomposing protein and polypeptide in cells by proteasem, so that the polysaccharide can be sufficiently dissolved in water, and carrying out HPSEC (high performance size exclusion chromatography) separation, parallax and refraction detector detection, and a phenol-sulfuric acid method on a final product to detect the content of reducing sugar. According to the auxiliary extraction method, the dissolution rate of dendrobe bioactive polysaccharide can be effectively improved, the protein content can be obviously reduced, the product quality and the yield can be greatly improved, and the use and the discharge of the acid-base solution and the toxic organic reagent and the generation of the microwave radiation can be avoided in the production technology, so that the auxiliary extraction method is more energy-saving and environment-friendly.
Owner:安徽同济生生物科技有限公司

Low-salt salted duck egg dynamic sousing salinity regulation and control method

The invention relates to a low-salt salted duck egg dynamic sousing salinity regulation and control method and belongs to the technical field of deep processing of animal products. The method comprises the steps as follows: firstly, dynamically sousing egg stuff in a high-salt sousing liquid for 2-3 hours by cooperating ultrasound with bubbles; secondly, continuously dynamically sousing the egg stuff in the high-slat sousing liquid under the condition of bubbling of a gas pump for 25-35 days; lastly, transferring the egg stuff to a low-salt sousing liquid for dynamic sousing under the condition of bubbling for 4.5-13.5 days, taking out the egg stuff from a tank, and cleaning, drying and packing the egg stuff to obtain the finished product. According to the invention, salt in the sousing liquid can be uniformly distributed by cooperating the ultrasound with the bubbles for dynamic souring; with the adoption of bubbling dynamic souring, the souring liquid and the egg stuff can be agitated, the salt more quickly infiltrates into egg whites and yolks from the sousing liquid, so as to shorten the processing cycle; the high-salt reverse infiltration of the egg whites can be achieved by adopting low-salt bubbling dynamic souring, the salinity of the egg whites of the finished product of the salted duck eggs is effectively lowered, and the moisture is improved, as a result, the product quality is improved, and a modern processing method for mass production of low-salt salted duck eggs is supplied.
Owner:NANJING AGRICULTURAL UNIVERSITY

Bletilla striata polysaccharide extract and preparation method thereof

The invention relates to the field of pharmacy, and discloses a Bletilla striata polysaccharide extract and a preparation method thereof. The preparation method comprises the following steps: crushingand sieving a Bletilla striata medicinal material to prepare Bletilla striata powder; adding the Bletilla striata powder to water, and carrying out ultrasonic extraction, centrifuging and filtering to prepare Bletilla striata water extract; concentrating the Bletilla striata water extract, adding ethanol to precipitate, taking the obtained precipitate, and washing and drying the precipitate to obtain crude Bletilla striata polysaccharides; and adding distilled water to dissolve the crude Bletilla striata polysaccharides, centrifuging the obtained solution, taking the obtained supernatant, sequentially carrying out microfiltration and ultrafiltration, concentrating the filtered supernatant, precipitating the obtained concentrate with alcohol, and taking, washing and drying the obtained precipitate in order to obtain the Bletilla striata polysaccharide extract. The ultrasonic extraction process used to destroy cell walls of the Bletilla striata powder facilitates the full dissolving ofthe Bletilla striata polysaccharides, and microfiltration-ultrafiltration combined purification is carried out based on the preparation of the crude Bletilla striata polysaccharides through an ultrasonic water extraction and alcohol precipitation technology to prepare the Bletilla striata polysaccharide extract, so the method can effectively remove proteins, starch and other impurities, and the prepared Bletilla striata polysaccharide extract has a high purity and a low protein content, and is free from starch and inactive polysaccharides.
Owner:ZHEJIANG CHINESE MEDICAL UNIVERSITY

Method for improving quality of tobacco leaves by adding enzyme preparation, glucose and citric acid

The invention provides a method for improving quality of tobacco leaves by adding enzyme preparation, glucose and citric acid and belongs to the field of tobacco processing. The method includes: spraying, by weight of that of treated tobacco leaves, 0.05%-0.1% of xylanase solution (pH=8.0) onto surfaces of the tobacco leaves prior to placing the tobacco leaves at the temperature ranging from 55 DEG C to 60 DEG C and the humidity of 50-60% in an enclosed environment for 4-10 hours; then spraying, by weight of that of the treated tobacco leaves, 0.1%-0.4% of acid protease solution (pH=3.5) onto the surfaces of the tobacco leaves and subjecting the tobacco leaves to stored-leaves enzymolysis for 3-6 hours at the temperature ranging from 20 DEG C to 30 DEG C and the humidity of 50-60%; adding, by weight of that of the treated tobacco leaves, 2.0%-4.0% of the glucose and 0.5%-1.0% of the citric acid for leaves storage for 5-8 hours in an environment at the temperature ranging from 20 DEG C to 30 DEG C and the humidity of 50-60%, drying the tobacco leaves for 3-10 minutes at the temperature ranging from 110 DEG C to 150 DEG C, and keeping flowing of air and turning of the tobacco leaves to further remove offensive odor and stimulus in the low-grade raw tobacco leaves; placing the well-treated tobacco leaves in an environment of a constant temperature and humidity chamber 22 DEG C in temperature and 60% in humidity for balancing for more than 48 hours till moisture content is equilibrium to 12%, and shredding prior to packing the tobacco leaves. By the method, tobacco smoke strength, the stimulus and the offensive odor can be lowered, pureness and mildness can be enhanced, and aroma can be harmonized.
Owner:CHINA TOBACCO GUANGXI IND

Process for improving quality and yield of collagen peptide coproduced from sodium chondroitin sulfate

A process for improving quality and yield of collagen peptide coproduced from sodium chondroitin sulfate comprises the following steps: (1) degreasing bovine cartilage by supercritical/subcritical extraction; (2) hydrolyzing, flocculating and separating endonuclease; (3) carrying out ultrafiltration to separate chondroitin sulfate sodium and collagen peptide; (4) refining the sodium chondroitin sulfate; and (5) refining the collagen peptide. The process is used for extracting the dried bovine cartilage chondroitin sulfate sodium and collagen peptide, meanwhile, the product yield and quality are improved, and the obtained product is white in color and luster and free of beef tallow smell. According to the process, the dried bovine bones are adopted, so that the problems that domestic bovinefeeding and slaughtering are scattered, and fresh bovine cartilage is high in storage, collection and transportation cost and high in difficulty are solved; and the process is simple in technologicalprocess, easy to filter, short in production time, capable of saving energy and reducing emission, low in production cost and remarkable in economic benefit and social benefit, and processes such asresin decoloration and ion exchange are not needed.
Owner:HUNAN WUXING BIOLOGICAL TECH CO LTD

Processing method for preventing secondary muddying of wild blueberry clear juice

The invention relates to a processing method for preventing secondary muddying of wild blueberry clear juice. The processing method comprises the following steps of adding vitamin C (VC) into pulped and broken fresh blueberries, adding pectinase to carry out enzymolysis, squeezing blueberry pulp, after being subjected to the enzymolysis, in a squeezing machine to obtain blueberry juice, carrying out high-temperature enzyme deactivation on the blueberry juice, adding the pectinase and amylase to carry out secondary enzymolysis, adding acid proteinase to carry out the enzymolysis, filtering by utilizing a diatomite filtering machine to obtain blueberry clear juice after the enzymolysis, preserving the blueberry clear juice at a low temperature after carrying out high-temperature sterilization on the blueberry clear juice, carrying out chill filtering by utilizing a paperboard filtering machine, and carrying out filling so as to obtain the blueberry clear juice product. According to the blueberry clear juice prepared by utilizing the processing method, a secondary muddying phenomenon of the blueberry clear juice is effectively avoided, and the appearance quality of the product is improved, the processing method is simple, the preparation cost is low, the taste of the product is good, the nutrition is rich, and the blueberry clear juice is beneficial to human bodies.
Owner:江苏伊云贝尔饮料股份有限公司
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