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101results about How to "Destructive activity" patented technology

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

Drying method capable of keeping bright-colored color, bloom form and inherent flavor of camellia chrysantha

The invention discloses a drying method capable of keeping bright-colored color, bloom form and inherent flavor of camellia chrysantha. The method comprises the steps of pre-freezing the picked fresh camellia chrysantha at the temperature of -18DEG C to enable the fresh camellia chrysantha to be iced and hardened; and putting into a low-temperature vacuum refrigerating machine, and drying for 8-12h under the condition that the vacuum degree is 80+/-20Pa and the temperature is 45-70DEG C. The drying method has the advantages that the appearance of the fresh camellia chrysantha can be fixed after the camellia chrysantha is pre-frozen; the cells of the fresh camellia chrysantha can be broken, so that the drying speed can be accelerated, and the drying time can be reduced; the activity of the fresh camellia chrysantha can be broken, so that the browning of the color in the process of heating can be avoided; and a certain vacuum degree can be kept by means of low-temperature vacuum freeze drying, so that the participation of oxygen can be completely eradicated, the oxidation reaction can be avoided, and the color of the fresh camellia chrysantha can be protected; and the evaporation temperature of moisture in the fresh camellia chrysantha can be reduced, and the evaporation speed of the moisture can be accelerated. A certain temperature in the machine can be kept, the drying speed can be accelerated, and the drying time can be reduced.
Owner:GUANGXI GUILIN TEA RES INST

Instant green tea and preparation method thereof

The invention specifically discloses instant green tea and a preparation method thereof. The instant green tea is prepared from fresh tea leaves, and the preparation method comprises processing steps of breaking, extracting, filtering, concentrating, forming and drying, wherein the step of concentrating is realized by concentrating through a reverse osmosis membrane and implementing low-temperature vacuum concentration to obtain a concentrated solution which has 30-50% of solid content; in the step of forming, a blow molding process is adopted, and carbon dioxide gas is filled under high pressure to be coated in the tea concentrated solution; the step of drying adopts supercritical carbon dioxide drying; before breaking, the preparation method further comprises steps of high-temperature and high-pressure steam treatment and quick freezing, so that enzymes in the tea leaves are deactivated and GCG is generated, and therefore, oxidation resistance of the tea leaves is enhanced. Through the method disclosed by the invention, active ingredients in the tea leaves are completely extracted and preserved, and the active ingredients are prevented from being oxidized in the preparation process; meanwhile, the granulated green tea or sliced green tea is filled with carbon dioxide, so that taste and aroma in drinking of the instant green tea are improved.
Owner:林志铭

Preserving method of pickled chili peppers

The invention mainly relates to the technical field of food processing, and discloses a preserving method of pickled chili peppers. The preserving method comprises the following steps of preparing rawmaterials; performing fermentation for the first time; performing fermentation for the second time; and performing packing. The method is simple, and the obtained pickled chili peppers are low in salinity, rich in fragrance, moderate in sour and hot degree, soft and crisp in mouth feel, free from any additive, safe and healthy. The species of the pickled chili peppers in the market are increased,and nutrient and health requirements of consumers are met. Fresh chili peppers are thoroughly cleaned, then staged drying is performed, cutting up is performed, and then preserving is performed, so that the moisture of the chili peppers is reduced, and the tissue of the chili peppers is softened; and therefore, the pickled chili peppers are soft and crisp in mouth feel. Soft and mashed mouth feelof conventional pickled chili peppers is changed, the condition that the pickled chili peppers are cut when being eaten is avoided, and the pickled chili peppers are convenient to eat. The chili peppers are cut up, soybean oligosaccharides are added, and then fermentation is performed with lactic acid bacteria, so that the pH is reduced, micromolecular fragrance and nutrient components are increased, and the bright color and the soft and crisp mouth feel of the chili peppers are maintained. Seasoning is added, and then fermentation is performed, so that the pickled chili peppers are rich in mouth feel, the appetite is promoted, and the pickled chili peppers are moderate in sweet and salty degree.
Owner:马鞍山市黄池恒香食品有限公司

Pulse control method and device thereof, ablation equipment, system and storage medium

The provides a pulse control method and a device thereof, ablation equipment, a system and a storage medium. The pulse control method comprises the following steps: outputting a nanosecond pulse sequence and a millisecond pulse sequence to a target biological tissue; the amplitude of the nanosecond pulse sequence is larger than the threshold voltage, and the amplitude of the millisecond pulse sequence is smaller than the threshold voltage. According to the embodiment of the invention, the nanosecond pulse sequence with the amplitude greater than the threshold voltage cooperates with the millisecond pulse sequence with the amplitude less than the threshold voltage, such as the synergistic effect of the high-voltage nanosecond pulse sequence and the low-voltage millisecond pulse sequence, so that the effective ablation range can be enlarged, the ablation is more thorough, the muscle contraction amplitude can be effectively reduced, or the muscle contraction probability is reduced, even the muscle contraction phenomenon is avoided, the treatment experience feeling of a patient can be improved, and the use of anesthetics can be reduced or even not needed, so that the treatment cost is effectively reduced, and side effects are reduced.
Owner:HANGZHOU WKNIFE MEDICAL TECH CO LTD

Grain storage equipment

The invention discloses grain storage equipment. The grain storage equipment comprises a cabinet body, a refrigerating compressor, an electric heating device and a sterilizing device are arranged in the cabinet body, an emptying device communicated with the outside is arranged on the cabinet body, and the refrigerating compressor, the electric heating device and the sterilizing device are electrically connected with a main control device. As the refrigerating compressor, the electric heating device and the sterilizing device are arranged in the cabinet body, heating and dehumidifying can be achieved to prevent mildewing and bacteria, then the sterilizing device is adopted for sterilization, and the refrigerating compressor is adopted to reduce the temperature in the cabinet body to keep the temperature in the cabinet body to be low so that the storage time of grain can be prolonged; as the electric heating device is arranged, after the grain is heated, moisture drained from the grain is exhausted in the form of steam, dryness and low humidity in the cabinet body are effectively ensured, the possibility of bacterium breeding and mildewing is reduced, and it is unnecessary to store the grain at too-low temperature, so that the freshness of the grain is ensured, and it is prevented that nutrition and activity of the grain are destroyed due to too-low temperature.
Owner:杨秀文

Preparation method of high sulphate group fucoidan polysaccharide

The invention provides a preparation method of high sulphate group fucoidan polysaccharide, and belongs to the technical field of active polysaccharides. The method solves the problems that in the process of extracting the fucoidan polysaccharide in the prior art, extraction liquid has many impurities; the polysaccharide leaching efficiency is low; the product purity is not high; the polysaccharide decomposing is caused by high temperature, strong acid or strong alkalinity environment in the preparation process; active groups such as sulphate groups are lost, and the like. According to the method, algal is used as a raw material; firstly, the algal is subjected to ultrafine crushing treatment, so that the algal cells are subjected to wall breaking; the polysaccharide leaching rate is increased; the extraction time is reduced; then, a water extraction method is used for extracting the fucoidan polysaccharide; the polysaccharide decomposing and the sulphate group activity loss can be reduced; the natural ingredients and activity of the fucoidan polysaccharide can be greatly remained; finally, the extraction liquid is subjected to protein removal by trichloroacetic acid, sodium alginate impurity removal through ethanol precipitation, and polysaccharide precipitation by ethanol, so that the high-purity and high sulphate group algal polysaccharide is obtained. The purity of the fucoidan polysaccharide prepared by the method can reach 60 to 70 percent; the organic sulfate radical content reaches 20 to 30 percent.
Owner:DALIAN SHENLAN PEPTIDE TECH R & D CO LTD

Tea enzyme-deactivating and baking streamline system utilizing microwave to heat and dry

The invention discloses a tea enzyme-deactivating and baking streamline system utilizing microwave to heat and dry. The system is composed of a material feeding hopper, a material feeding mouth, a gas outlet pipe, a microwave chamber, a microwave magnetron generator, an aspiration channel, an exhaust inlet, an attenuation chamber, a conveyor belt, a transmission auxiliary shaft, a finished-product vehicle, a control cabinet, an outer control disc, a transmission platform, a support, an enzyme-deactivating and baking cavity, a material feeding attenuation chamber, a motor, an electric chamber, a decelerator, a driving belt, a transmission main shaft, and a device machine body. The system fully utilizes the penetrating performance and non-thermal effect of microwave to rapidly heat the tea to a required temperature for enzyme-deactivating and drying to destroy the activity of the enzyme in fresh tea leaves to inhibit the enzymatic reactions; the microwave makes the inner molecules in tea to collide with each other in a high speed, thus a great amount of friction heat is generated, the temperature of the tea is rapidly increased, the surface and inner of the tea are simultaneously heated in a short time, thus a great amount of water molecules are rapidly evaporated from the tea, and the effects of rapid enzyme-deactivating, drying, sterilizing, and improving tea quality are achieved.
Owner:刘方旭

Multilayer enzyme deactivating and rolling machine

The invention relates to the technical field of agricultural machines, and concretely relates to a multilayer enzyme deactivating and rolling machine. The machine comprises a pedestal, a feeding device, a leaf separation device, an enzyme deactivating device, a driving device and a rolling device, and the pedestal includes a heating furnace, a leaf receiving box and a base plate; the feeding device comprises first supports, a feeding box, a first slide way, a second slide way and a third slide way; the leaf separation device comprises a sliding leaf separation plate and a fixed leaf separation plate; the enzyme deactivating device comprises a first rotating cylinder, a second rotating cylinder, a third rotating cylinder, a first sprocket wheel, second supports, a fixed cylinder and fixed rods; the driving device comprises a second side plate, third supports, a second motor, a second sprocket wheel and a chain; and the rolling device comprises fourth supports, a third motor, a rotating disc and rolling plates. A plurality of the rotating cylinders are arranged on the machine, so the enzyme deactivating area is increased, and the folding problem of tea leaves is solved; and direct rolling is carried out after the enzyme deactivation, so damaging of the tea leaves, easily caused by long-time drying of the tea leaves, is avoided, and the processing quality is increased.
Owner:ANHUI LVYUE TEA

Preparation method of long-circulation multifunctional metal organic framework nano preparation

The invention relates to a preparation method of a long-circulation multifunctional metal organic framework nano-preparation, which comprises the following steps: preparing a GA/Fe nano-composite with moderate particle size by taking PVP (Polyvinyl Pyrrolidone) as a mineralizer, and then obtaining white nano-particles; white nano-particles are dissolved and soaked in a hyaluronic acid solution for incubation, and the multifunctional metal organic framework nano-preparation is prepared; the preparation has excellent biocompatibility, tumor targeting ability, bimodal imaging function and combined CDT/hunger therapy/chemotherapy ability, in-situ imaging and treatment of tumors can be realized at the same time, stealth can be realized in vivo due to doping of polyethylene glycol, long circulation is realized, the preparation has good targeting ability, and the preparation has good application prospects. A PVA/Fe nano-composite based on polyvinylpyrrolidone is packaged, so that the preparation simultaneously realizes a T2 imaging effect based on Fe < 3 + >, the spatial position of a tumor can be accurately obtained, and gallic acid can reduce Fe < 3 + > generated by a Fenton reaction and accelerate the Fenton reaction to generate. OH to effectively kill tumor cells; good application prospects are realized in tumor treatment.
Owner:SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI
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