63results about How to "Passivation activity" patented technology

The invention provides a broad spectrum heavy metal activity deactivator preparation method. The present invention relates to a soil conditioning agent preparation method, which comprises the following steps: (A) taking humic acid-rich peat, digest compost or a forest soil humus layer, and carrying out screening to provide a spare use; (B) adding the humic acid-rich material to HCl or HNO3 to soak, and stirring 2-3 times; (C) filtering the soaked material with a bamboo drying pad, washing 2-3 times with clear water, and carrying out air drying to a moisture content of less than 5%; (D) sequentially adding ZnSO4.7H2O, sodium silicate and sodium selenite to the material obtained from the step (C), carrying out aging on the mixed material for 2-3 days and uniformly mixing; and (E) adding limestone powder to the material obtained from the step (D), and completely and uniformly mixing to prepare the broad spectrum heavy metal deactivator. With the combination inhibitor prepared by the preparation method, activities of soil heavy metals can be significantly inactivated, the heavy metals can be inhibited from entering the food chain, and risks on human health by the heavy metals can be reduced.

The invention discloses a preparation method for a tea extract, belonging to the technical field of extraction of effective components of tea leaves. The preparation method comprises the following steps: firstly, carrying out low-temperature rapid freezing treatment on high-quality commercial tea leaves; then immediately crushing; then combining a high-voltage pulsed electric field (PEF for short) technology, an ultrasonic treatment technology and a low-temperature enzymolysis technology; and carrying out low-temperature extraction in a whole process. According to the preparation method for the tea extract, the loss of effective components, caused by high-temperature processing, is avoided, and the extraction rate of the effective components of the tea leaves is also improved. The process is simple and low in cost; the introduction amount of extraneous food additives, processing auxiliary agents and chemical substances is reduced; the natural nutritional ingredient and the flavor of the tea leaves are kept to the greatest extent, the low-carbon production is realized and the environment is protected.

The invention discloses a method for stabilizing the wheat bran specially used for the whole wheat flour, which is mainly characterized in that: the wheat bran is treated by steam and dried by the ultraviolet microwave so that the wheat bran is stabilized. Due to the adoption of the method, the activity of the lipase and the lipoxygenase in the wheat bran can be reduced significantly, and the storage stability of the wheat bran can be improved significantly. In addition, the treated wheat bran has little difference from the non-stabilized wheat bran in colour and organoleptic quality, the content of total phenols in the treated wheat bran is increased slightly, and the antioxidant activity of the treated wheat bran is improved obviously. The method is simple and practical, has an obvious effect and effectively solves a series of problems of the existing method for stabilizing the wheat bran that the equipment has high cost, the operation process is burdensome and complicated, the wheat bran has poor storage stability, the colour of the stabilized wheat bran is dark, the efficacy and the activity are lost, and the stabilized wheat bran is not suitable for producing the whole wheat flour, thereby creating the conditions for producing the high-quality whole wheat flour with long shelf life.

The invention relates to a bean dregs dietary fiber superfine powder and a preparation method thereof. The present invention uses wet ultrafine grinding and extrusion technology to process fresh bean dregs in time and process soybean dietary fiber powder in one step, that is, to obtain bean dregs meal by heating bean dregs to eliminate enzymes, remove fishy smell, grind, homogenize, extrude, and dry. Fiber micropowder. The present invention integrates the preparation of bean dregs dietary fiber and the modification of dietary fiber into one process, which simplifies the process; the process adopts all physical treatment methods, which avoids the safety caused by residues of additives or the impact on product composition. Negative effects and other issues, and no by-products, can realize the simultaneous completion of resource utilization and environmental protection. Compared with ordinary soybean dregs dietary fiber powder, the product of the present invention has enhanced function, improved taste and color, and passivated factors causing bad flavor, and is widely used in the fields of food and health food.

The invention discloses a planting method of jute in heavy-metal contaminated soil. The method comprises the following steps of: A, preparing soil and building a field, and applying passivator to reduce activity of heavy metal in the soil; B, selecting a specific jute variety with strong heavy metal contamination resistance, sowing in an enough amount at proper time to guarantee full seedlings; C, determining appropriate close planting, thinning/finally singlings in good time, and reserving enough basic seedlings; and D, intertilling/weeding in time, rationally topdressing/irrigating to culture effective strong plants; E, reinforcing prevention and control of diseases and insect pests to realize high yield of jute. By the jute planting method, the average yields of raw stems in light, medium and heavy contaminated jute fields are respectively 181.0+/-16.4, 174.9+/-15.7 and 158.5+/-15.3kg/mu, which reaches the high-yield level of the jute growing area in South China; and the content of heavy metal in raw jute can be controlled in a range of related standard limit, so that agricultural safety and effective utilization of heavy metal contaminated soil can be realized. The method is simple in technology and practical, and has wide application prospect in broad heavy metal contaminated areas.

The invention discloses a processing method of green tea, belonging to the technical field of tea processing. The method comprises the steps of withering, rocking, fixation, rolling and baking and concretely comprises the steps of naturally withering picked tea leaves in the open air; then, withering by blowing the tea leaves by an air blower in a room for 2-3 hours; putting the withered tea leaves into a rocking machine, and carrying out rocking for three times; and after that, performing fixation on the tea leaves, rolling, baking, and packaging to obtain the green tea. The green tea has the characteristics of having green leaves with red edges, and being golden in liquor color, fragrant, mellow in taste as well as sweet and fresh in aftertaste after being drunk.

The present invention provides a preparation method of needle tea. Said preparation method includes the following steps: steaming, dehydration, primary rolling, hot air drying, further rolling, forming and drying so as to obtain the invented finished product.

The invention belongs to the food processing field of staple food and relates to buckwheat steamed bread with a high flavone content and a preparation method of the buckwheat steamed bread. The buckwheat steamed bread is prepared from the following components: high gluten wheat flour, tartary buckwheat powder, sweet buckwheat powder, alpha-amylase, pentosanase, water and yeast. The preparation method of the buckwheat steamed bread comprises the following steps of: firstly, carrying out vacuum freeze drying and ultrafine grinding treatment on the tartary buckwheat powder and the sweet buckwheat powder, respectively; then, uniformly mixing the high gluten wheat flour, the tartary buckwheat powder, the sweet buckwheat powder, the alpha-amylase, the pentosanase and the yeast and then adding water to the mixture; and finally, mixing, tabletting, dividing and forming, fermenting, cooking, cooling and packaging to obtain the buckwheat steamed bread with the high flavone content. According to the buckwheat steamed bread with the high flavone content and the preparation method of the buckwheat steamed bread, the content of the favone in the buckwheat is improved, processing performances, such as elasticity and viscosity, of buckwheat dough are improved, and the rough mouthfeel of the product is improved by applying advanced technologies such as vacuum freeze drying, ultrafine grinding and bio-enzyme treating. The buckwheat streamed bead produced by the preparation method disclosed by the invention is fine in mouthfeel, can be used as staple food for long-term consumption, higher in flavone content, and is provided with a healthcare function of regulating lipid and reducing blood glucose by buckwheat.

The invention discloses a calcium-iron-silicon-based composite material for restoring heavy metal polluted acid soil and application thereof. The mass ratio of component elements of the composite material is calcium:iron:silicon:manganese:magnesium:phosphorus:aluminum= 30-40:19-25:8-12:1-3:5-6:1-3:2-5, the composite material is particularly prepared from, by volume, 55-70% of calcium silicate, 20-30% of calcium ferrite and 5-15% of compound mixture, and the compound mixture is a mixture of calcium-iron-aluminum oxides, calcium iron silicate, calcium aluminate, calcium-aluminum oxides, calcium-manganese-iron oxides, hydroxyl aluminium phosphate and hydroxyl manganese phosphate. The composite material is used for improving and restoring the heavy metal polluted acid soil, the pH value of the soil can be increased by 0.5-2.5 units, the content of effective state heavy metal in the soil is reduced by 64-98%, the content of heavy metal in agricultural products is reduced by 33-94% compared with a control group, and the yield of the agricultural products is increased by 16-1412% compared with the control group.

The invention discloses an alkaline organic fertilizer for restoring soil polluted by heavy metals and a preparation method of the alkaline organic fertilizer, and relates to the technical field of agricultural fertilizers. The alkaline organic fertilizer is prepared from, by weight, 1-3 parts of urea, 1-3 parts of potassium sulphate, 2-6 parts of diammonium phosphate, 10-30 parts of tobacco straw, 30-40 parts of alkaline ash, 15-35 parts of livestock manure, 10-30 parts of bean stalks, 10-30 parts of purple soil, 1-3 parts of microelements, 0.5-1.5 parts of biological bacteria, 3-5 parts of lime nitrogen and 0.02-0.04 part of nitragin. The alkaline organic fertilizer has a good restoring effect on the soil polluted by the heavy metals, is suitable for being used in acidic soil, can be used for farmland soil heavy metal pollution restoration and ecological improvement in southern paddy fields in China, and can also be used for dry farmland soil heavy metal pollution restoration and ecological improvement in the south.

The invention relates to an aralia mandshurica green-protecting compounded agent and belongs to the field of agricultural product processing. The invention develops a food-grade compounded green-protecting agent specially used for aralia mandshurica and aims at solving the problem that the aralia mandshurica can get yellow easily and is not applicable to long-term storage and the current situation that a green-protecting agent containing heavy metal ions is mainly adopted for green protecting in the fruit and vegetable fresh-keeping industry. The aralia mandshurica blanched by virtue of the aralia mandshurica green-protecting compounded agent is emerald green in overall, full in appearance and long in preservation time. The green-protecting compounded agent provided by the invention has the advantages that on the basis that three green-protecting agents, namely vitamin C, cysteine and sodium sulfite, respectively fully play roles, citric acid and calcium chloride are added to enhance the synergistic green-protecting effect, so that chlorophyll of the aralia mandshurica is effectively protected, and the chlorophyll loss ratio is reduced; and no heavy metal ion is added, so that the green-protecting compounded agent serves as a green, safe and efficient green-protecting method, and a basis can be provided for development of the industries such as aralia mandshurica green-protecting and fresh-keeping, green processing of aralia mandshurica and development of related green foods.

The invention provides a making method of canned olea europaea fruits. The making method comprises the following steps of selecting fruits, performing cleaning, performing soaking in an aqueous alkaline solution, performing pickling, sealing cans and performing sterilization. The making method is characterized by comprising the specific steps of putting acid-pickled and hardened olea europaea fruits into boiling water, performing stirring for 2-5 minutes, fishing out the stirred olea europaea fruits, and performing cooling with cold water; pricking or carving the acid-pickled, hardened and cooled olea europaea fruits; adding an appropriate quantity of food additives to the pricked or carved olea europaea fruits at twice, putting the olea europaea fruits with the food additives into water, boiling over the olea europaea fruits, and pouring the boiled olea europaea fruits into a vat for standing for 20-26 hours; fishing out the olea europaea fruits in which materials are permeated, adding an appropriate quantity of food additives, putting the processed olea europaea fruits into the water, boiling over the olea europaea fruits, fishing out the boiled olea europaea fruits, and performing rinsing to remove the food additives on the surface of the peel of the olea europaea fruits; and sealing the cans, loading the olea europaea fruits after surface treatment, adding a food additive aqueous solution, performing sealing, and performing covering. The canned olea europaea fruits made by the making method disclosed by the invention are free from bitter taste, the olea europaea fruits are consistent in surface color and uniform in hardness, permeated materials in the olea europaea fruits are uniform, and canned olea europaea fruits are consistent in taste.

The present invention discloses high-quality and low-temperature instant black tea powder and a preparation technology thereof. The high-quality and low-temperature instant black tea powder is prepared by the following steps: material selecting, withering, rolling, stacking and placing, first fermentation treating, hot water soaking, filtering, mixed microwave treating of a first filtering residue and a part of a first filtrate, second fermenting, ultrasonic treating after mixing of the remaining part of the first filtrate and fermentation liquid, drying, etc. A ratio of theaflavins, thearubigins and theabrownins is appropriate. The preparation technology improves drinking flavor of the brewed black tea powder and is also good in low-temperature instant dissolution effects.

The invention discloses a method for passivating the activity of dissolved polyphenol oxidase and membrane-bound polyphenol oxidase. The method comprises the following steps: step 1, taking fruit andvegetable materials, and carrying out first ultrahigh pressure treatment; step 2, performing ultrahigh-pressure homogenization treatment on the fruit and vegetable materials for 1-3 times at room temperature under a pressure value of 100-400MPa and an inlet temperature of 35-55 DEG C; and step 3, after a citric acid solution or a tartaric acid solution is added, performing secondary ultrahigh-pressure treatment at a room temperature under a pressure value of 150-600 MPa for a pressure maintaining time of 10-30 min. According to the invention, the activity of PPO in the juice can be effectivelypassivated, the sPPO activity inhibition rate is 98%, and the mPPO activity inhibition rate is 95%. Compared with traditional heat treatment, the method not only has a good passivation effect and maintains the flavor of the fruit juice, but also facilitates the improvement of the sensory quality of the fruit juice by an ultrahigh-pressure homogenization technology.

The invention relates to a preparation method for high-yield bean cured without beany flavour. The method comprises a bean curd drying and crushing step, a softening step, a flaking step, a step of grinding blank pieces into slurry, cooking the slurry, pouring brine, and pressing and forming, wherein the softening step refers to adopting indirect steam to perform step type softening on the crushedsoy beans. The preparation method greatly reduces the amount of bean dregs, so that the total amount of proteins adsorbed by the bean dregs is also reduced, the product yield is increased, activity of lipoxygenase is passivated, and therefore, the bean curd is free of beany flavour, and bitter taste is eliminated. The conventional method generates a great deal of bean dregs through a process of soaking, grinding into slurry, cooking the slurry, pouring brine, forming and pressing, so that a great amount of proteins lose, and the product yield is low; and meanwhile, the process directly adoptssoy beans as a raw material, and passivating treatment is not performed on lipoxidase, so that the beany flavour of bean curd is severe, and bitter taste is generated.

The invention discloses freeze-dried siraitia grosvenorii slices and a preparation method thereof and belongs to the technical field of food processing. The freeze-dried fructus siraitiae slices are prepared through processes of selecting, slicing, carrying out fixation, naturally drying by air, pre-freezing, carrying out secondary freezing, deeply freezing and the like. Compared with the prior art, the method has a simple and easily-controlled process, short freezing and drying time, low energy consumption and high production efficiency; a hot water fixation technology is adopted so that the activity of enzymes including polyphenol oxidase and the like in siraitia grosvenorii peels is deactivated; three times of freezing processes are adopted so that moisture in siraitia grosvenorii is volatilized in sequence and the separation of peels and pulp, caused by moisture drying, is avoided; meanwhile, the color and luster, aroma, taste, nutrient components and the like of the siraitia grosvenorii are kept very well.