37 results about "Semipermeable membrane" patented technology

The invention provides a core-shell microsphere for feed detoxification and a preparation method and application thereof.The core-shell microsphere comprises a sclerotium layer, a magnetic shell layer and a catalytic layer from inside to outside, and the sclerotium layer is composed of bacillus licheniformis and lactobacillus rhamnosus composite flora and a chitosan-sodium tripolyphosphate semipermeable membrane wrapping thalli; the magnetic shell layer is a Fe3O4 nano-particle coating, and the catalytic layer is a porous Mn-Ce-O shell. The microspheres have the double functions of biodegradation and chemical catalysis, the internal flora can degrade various toxins, the external catalytic layer efficiently decomposes stubborn toxins, the magnetic layer realizes rapid magnetic separation and recovery, and the microspheres are suitable for removing mycotoxins from feed raw materials such as corn and soybean meal.

This invention belongs to the field of membrane cleaning technology and discloses a semi-permeable membrane cleaning device and its process. The device includes a first cleaning unit, which includes a cleaning water tank and a cleaning water pump. The cleaning water tank is connected to a cleaning pipe, and the cleaning water pump is connected in series on the cleaning pipe. The free end of the cleaning pipe is used to connect to the fluid inlet of the finished semi-permeable membrane. The first cleaning unit also includes a reagent tank and a reagent pump. The reagent tank is connected to a reagent pipe and a return pipe. The reagent pump is connected in series on the reagent pipe. The free end of the reagent pipe is used to connect to the fluid inlet of the finished semi-permeable membrane, and the free end of the return pipe is used to connect to the fluid outlet of the finished semi-permeable membrane. In this solution, the semi-permeable membrane is first cleaned of contaminants by circulating alcohol in the reagent tank, and then the semi-permeable membrane is rinsed and replaced with water. This invention solves the problem that pure water flushing is insufficient for removing organic pollutants and avoids the problem that acid and alkali washing can easily damage the membrane material.

The invention discloses a dust and poison synergistic efficient treatment purifier and a use method thereof. The dust and poison synergistic efficient treatment purifier comprises an axial flow fan, a gravity settling chamber, a wet metal-based filter screen dust removal device, a novel dust suppressant, a sewage treatment device, a novel semi-permeable membrane, a dual-purpose suction blowing pump, a dust suppressant adding system, a demister, a sludge pressing and conveying device and an automatic console. The axial flow fan, the gravity settling chamber, the wet metal-based filter screen dust removal device and the demister are connected in sequence; the sewage treatment device is mounted at the lower part of the wet metal-based filter screen dust removal device; the sludge pressing and conveying device, the sewage tank, the dual-purpose suction and blowing pump and the dust suppressant adding system are connected in sequence; a dust suppressant is added into the wet-type metal-based filter screen dust removal device through the dust suppressant adding device. According to the invention, various poisonous and harmful gases and dust generated under the mine can be effectively removed, underground pollution is reduced, and the body health of underground operators is protected.

The application discloses a fermentation preparation method of Lactobacillus hilakii with high GABA yield, and the method comprises the following steps: two-stage fermentation is carried out by using Lactobacillus hilakii, acid stress and intermittent substrate feeding are used to induce and maintain high activity of GAD enzyme in the GABA synthesis stage; when GABA accumulates to a certain concentration, a semi-permeable membrane filtration system connected with a fermentation tank is started, the product is removed on line, and the circulating bacteria are intercepted, so that the product inhibition is released, and the substrate concentration is controlled; the permeate is collected, and high-purity food-grade gamma-aminobutyric acid is obtained through the steps of ultrafiltration, decolorization, ion purification, concentration, crystallization and drying. The application innovatively couples fermentation with on-line membrane separation, breaks through the bottleneck of the traditional process, realizes super-high yield (>360 g / L) and super-high efficiency production of GABA accumulation, significantly shortens the production cycle, reduces the cost, and the obtained product meets the new resource food standard.

The utility model belongs to the technical field of waste treatment, and discloses a demisting device for an absorption tower, the demisting device comprises a demisting assembly I and a demisting assembly II, the demisting assembly I is coaxially mounted in an air inducing pipeline, a backflow cavity I is positioned between the side wall of a reaction cavity and the inner side wall of the absorption tower, the top end of the backflow cavity I is open, and the air inducing pipeline is communicated with the backflow cavity I; a second backflow cavity is formed between the outer side wall of the air inducing pipeline and the outer cavity wall of the top end of the reaction cavity, the second backflow cavity is communicated with the air inducing pipeline, a hydrophilic semi-permeable membrane is arranged at the communication position, and the side end of the second backflow cavity is communicated with the first backflow cavity; the bottom of the exhaust cavity communicates with an air inlet pipeline, and the lower end of the air inlet pipeline communicates with the air inducing pipeline and the first backflow cavity. The second demisting assembly is installed in the air inlet pipeline, and an exhaust port communicating with the outside is formed in the top of the exhaust cavity. According to the demisting device, the flowing path of liquid is changed, the situation that the liquid and gas are repeatedly mixed to generate mist again can be reduced, secondary demisting is conducted through the second demisting assembly, and the demisting effect is improved.

The invention relates to a device and a method for eluting, purifying and recovering oversized DNA (deoxyribonucleic acid) based on pulsed field gel electrophoresis, which are used for efficiently recovering complete DNA molecules from hundred kb level to Mb level. The device comprises an electrophoresis protection chamber with a polygonal container structure and a sample recovery chamber, the side edge of the protection chamber is provided with a semi-permeable membrane for current to pass through, and the recovery chamber is detachably placed in the center and comprises the semi-permeable membrane; the detachable and replaceable magnesium sheet is arranged in the protection chamber and is used for ionizing magnesium ions to promote DNA (Deoxyribose Nucleic Acid) compression; the method comprises the following steps: preparing a biological sample into an agarose gel block, cracking and cleaning the agarose gel block, placing the agarose gel block in a device, and adding a recovery protection solution containing PEG; under the condition of pulsed field gel electrophoresis, DNA migrates out of a gel block and is combined with magnesium ions to be compressed into spheres, and the spheres are collected in a recovery chamber after charges are neutralized. Compared with the prior art, the method provided by the invention overcomes the defects of low product purity and tedious steps of a traditional recovery method, realizes high-purity and high-efficiency integrated recovery, and is suitable for genomics research and biotechnology application.

A system and method for the removal of poly- and / or perfluoroalkyl fluorinated materials contaminants from an aqueous mass uses a system which includes:a) a first chamber for holding the aqueous mass containing a detectable amount of poly- and / or perfluoroalkyl fluorinated materials;b) an anode and a cathode in electronic connection with the aqueous mass in the first chamber; andc) an anionic semipermeable membrane or porous structure between the aqueous mass and the anode.The anionic semipermeable membrane comprises at least 0.0001% by total weight of the anionic semipermeable membrane of a cationic compound adhered to the anionic semipermeable membrane.

The utility model relates to the technical field of road construction, in particular to an anti-freezing and anti-thawing device for a roadbed. Comprising a road surface layer, a base layer arranged below the road surface layer and drainage ditches arranged on the two sides of the road surface layer, a salt-containing layer is arranged between the base layer and the road surface layer, a semi-permeable membrane layer is arranged between the salt-containing layer and the road surface layer, a waterproof layer is arranged between the salt-containing layer and the base layer, and a liquid storage tank is arranged on the side face of the salt-containing layer. And the liquid storage tank is connected with the drainage ditch through a channel with a valve. The salt-containing layer in the anti-freezing and anti-thawing device can absorb residual moisture in the roadbed, the moisture content of the roadbed is reduced, the anti-freezing and anti-thawing effect is improved, and meanwhile the high anti-freezing and anti-thawing effect can be kept by adding a salt solution; the salt-containing layer is in a closed state, so that the salt cannot diffuse to the outside, and the environment-friendly effect is achieved.

The application discloses a fermentation preparation method of Lactobacillus hilakii with high GABA yield, and the method comprises the following steps: two-stage fermentation is carried out by using Lactobacillus hilakii, acid stress and intermittent substrate feeding are used to induce and maintain high activity of GAD enzyme in the GABA synthesis stage; when GABA accumulates to a certain concentration, a semi-permeable membrane filtration system connected with a fermentation tank is started, the product is removed on line, and the circulating bacteria are intercepted, so that the product inhibition is released, and the substrate concentration is controlled; the permeate is collected, and high-purity food-grade gamma-aminobutyric acid is obtained through the steps of ultrafiltration, decolorization, ion purification, concentration, crystallization and drying. The application innovatively couples fermentation with on-line membrane separation, breaks through the bottleneck of the traditional process, realizes super-high yield (>360 g / L) and super-high efficiency production of GABA accumulation, significantly shortens the production cycle, reduces the cost, and the obtained product meets the new resource food standard.

This application provides a nano-silicone emulsion, its preparation method, and its application. The nano-silicone emulsion provided in this application comprises: 5-15 parts by weight of polyol; 1-10 parts by weight of nano-SiO2; 1-10 parts by weight of silane coupling agent; 5-20 parts by weight of silicate; and 100 parts by weight of water. Using polyol, silane coupling agent, nano-SiO2, silicate, and water as raw materials, this application obtains the nano-silicone emulsion through physical blending and chemical grafting modification. It can effectively inhibit bentonite hydration and dispersion, seal formation micro-fractures, and simultaneously form a strongly adsorbed hydrophobic semi-permeable membrane on the wellbore, achieving both physical sealing and chemical wellbore strengthening. For formations with well-developed bedding or fractures, the nano-silicone emulsion provided in this application can enhance the drilling fluid's ability to inhibit collapse and seal wellbore, reduce hydration stress, decrease the interaction between water-based filtrate and formation rocks, and improve mud cake quality, thereby achieving wellbore strengthening.

The invention provides a microalgae culture method and application thereof, in the microalgae culture method, a nitrogen source comprises industrial ammonium sulfate; the nitrogen source is continuously added into the culture medium at a fixed rate; alkali liquor wrapped by a semipermeable membrane is arranged in the culture medium. According to the method provided by the invention, industrial ammonium sulfate is adopted as a nitrogen source, so that the culture cost is remarkably reduced, and the problems of culture medium acidification and excessive heavy metal caused by one-time feeding of ammonium sulfate are relieved while sufficient nitrogen source is ensured by adopting a specific adding mode; the semi-permeable membrane coated alkali liquor dynamically responds to H < + > release caused by microalgae ammonium sulfate assimilation, so that the process steps are simplified, the process automation level is improved, the yield of microalgae carbon sequestration biomass is improved by 30% compared with sodium nitrate culture, the nutritive salt cost is reduced by 70%, and the quality of algae powder, including protein content, heavy metal components and the like, meets the standard; the operation cost of the microalgae carbon sequestration industry is greatly reduced, and the development of the microalgae carbon sequestration industry is promoted.

This invention relates to the field of fruit preservation technology and discloses a method for preserving mangoes containing chitosan, a eutectic solvent, and EGC. The method includes the following steps: adding chitosan to an acetic acid solution and heating and stirring in a water bath to obtain a chitosan film solution; pre-dispersing and wetting epigallocatechin in a eutectic solvent, then adding it to the aforementioned chitosan film solution and stirring at room temperature to obtain a modified chitosan composite film solution; selecting undamaged mangoes, washing and air-drying their surface moisture, immersing them in the modified chitosan composite film solution to evenly coat the surface with the film solution, removing them and air-drying them naturally, repeating the aforementioned immersion and air-drying process, and finally storing the dried mangoes in an indoor environment for preservation. This invention utilizes a eutectic solvent to solve the problem of easy aggregation of polyphenolic active substances, forming a uniform and continuous semi-permeable membrane on the mango peel, limiting moisture loss, achieving slow release of antioxidant components, and significantly extending the mango's shelf life.

The invention relates to a nicotine osmotic pump tablet for oral cavity and a preparation method thereof. The nicotine osmotic pump tablet for the oral cavity comprises a tablet core, the tablet core comprises a medicine layer and a boosting layer, the medicine layer comprises nicotine and a hydrophilic polymer, and the boosting layer comprises an osmotic pressure accelerant, an insoluble expanding agent and a hydrophilic polymer; the semipermeable membrane covers the tablet core, the weight of the semipermeable membrane accounts for less than 10% of the weight of the tablet core, the semipermeable membrane comprises a base material and a pore-foaming agent, and the weight of the pore-foaming agent accounts for 10%-20% of the weight of the semipermeable membrane; and the release hole can release the nicotine after the semipermeable membrane permeates into the liquid. The nicotine osmotic pump tablet for the oral cavity can adapt to the oral cavity environment, meets the core requirement of applying nicotine to the oral cavity, has no rupture condition in the nicotine dissolution process, is better in mechanical property, and can be accurately, rapidly and completely released in the oral cavity environment in a short time in a staged manner.

The invention discloses a probiotic and propionibacterium acnes co-culture system and application thereof. The semi-permeable membrane is arranged between the upper cavity and the lower cavity; the aperture of the semi-permeable membrane is 0.4 mu m; the upper cavity and the lower cavity comprise a liquid culture medium; the probiotics are lactobacillus plantarum and / or streptococcus thermophilus, the upper cavity is inoculated with the lactobacillus plantarum and / or streptococcus thermophilus, and the lower cavity is inoculated with propionibacterium acnes. Through culture medium, anaerobic conditions and strain proportion gradient design, stable co-culture of the three bacteria is realized, and a systematic function evaluation platform is constructed and used for probiotic screening, acne skin micro-ecological mechanism research and cosmetic functional raw material evaluation.

The present application relates to stress-dry-wet-freeze coupling effect of unsaturated soil testing device, including pressure chamber, the bottom is equipped with in pressure chamber, the bottom is equipped with vertical loading mechanism above to realize to the sample load, still include for placing in the sample cap of sample top surface, the sample cap and the bottom are used for the surface for the experiment is equipped with liquid tank to cover with semi-permeable membrane, the liquid tank of sample cap and the bottom is connected in dry-wet circulation system to realize the dry-wet circulation of sample, the internal space of pressure chamber is connected in freeze-thaw circulation system to realize the freeze-thaw circulation of sample, the present application realizes the test under stress-dry-wet-freeze coupling effect.

The invention discloses a large volume parenteral production sterile area drainage floor drain which comprises a shell, a mounting ring is fixedly mounted on the outer surface of the shell, a first filter screen is movably mounted at the top of the shell, a second filter screen is slidably mounted on the inner wall of the shell, and a sleeve is fixedly mounted at the bottom of the second filter screen. A one-way semi-permeable membrane is rotatably mounted on the inner surface of the sleeve, a water retaining block is fixedly mounted on the inner wall of the shell, and a U-shaped water pipe is fixedly mounted at the top of the shell; during drainage, sewage flaps the one-way semi-permeable membrane, the one-way semi-permeable membrane is promoted to rotate, the drainage amount of the floor drain is increased, the situation that the sewage is gathered and cannot be rapidly drained is avoided, drainage is not affected even if the one-way semi-permeable membrane does not rotate when the drainage amount is small, meanwhile, the rotating difficulty of the one-way semi-permeable membrane can be increased through cooperation with the four balancing weights, and the drainage efficiency is improved. The insect prevention function of the floor drain is further increased, and meanwhile, due to the characteristics of the one-way semi-permeable membrane, the effect of preventing odor from diffusing to the top of the shell can be achieved.

Described herein are methods of recovering lithium from dilute lithium sources. The methods include extracting lithium from an extraction feed using direct lithium extraction in an extraction stage to yield a lithium intermediate, performing one or more concentration operations, each concentration operation concentrating an input stream to yield an output feed, wherein the input stream is obtained from the lithium intermediate and / or the extraction feed is obtained from the output feed. At least one of the concentration operations includes a membrane separation operation having a plurality of reactors in series each having a semi-permeable membrane, such as a counter-flow reverse osmosis operation. Methods may also include generating a low TDS stream as a permeate from any of the one or more concentration operations, wherein the low TDS stream is recycled or used as fresh water.

A mass production system for deep sea water desalination livelihood water comprises a sea water storage pool (3), at least two high-pressure gravity sedimentation pools (4), a plurality of first salt water separators (5A), a fresh water storage pool (6) and a brine storage pool (7), the high-pressure gravity sedimentation pools (4) are 30 meters high, and a semi-permeable membrane isolation plate (46) is arranged at the position 20 meters high and divides the high-pressure gravity sedimentation pools (4) into an upper pool and a lower pool; the seawater storage pool (3) inputs seawater into the lower pool; the water depth of the lower tank is 10-30 meters, and impurities such as heavy metals and the like are quickly precipitated in a high-pressure gravity environment and cannot climb upwards to penetrate through the pore diameter of a nanoscale semi-permeable membrane isolation plate (46) to enter the upper tank; in the upper tank, a semi-permeable membrane isolation pipe (44) is arranged, clean seawater is input into a first brine separator (5A) after being filtered again by the semi-permeable membrane isolation pipe (44), and after brine is separated by a freezing method, fresh water is sent to a fresh water storage tank (6), and brine is sent to a brine storage tank (7).

The application discloses a drip tube assembly, a shower nozzle device and a developing machine, the drip tube assembly comprising a drip tube body connected with a driving assembly; the top end of the drip tube body and the driving assembly are hingedly connected; the drip tube body comprises a columnar tube for containing liquid material; the top end of the columnar tube is communicated with a conveying pipeline, and the bottom end is connected with a drip nozzle; an exhaust port is arranged on the upper section of the columnar tube, and a semi-permeable membrane is arranged on the exhaust port; the semi-permeable membrane is air-permeable and blocks the liquid material; the driving assembly is used for driving the columnar tube to rotate around a vertical axis; when the driving assembly drives the columnar tube to rotate, the bottom end of the columnar tube swings in a vertical plane with the connecting point of the columnar tube and the driving assembly as a fulcrum. In the application, the driving assembly and the columnar tube jointly form a structure similar to a centrifuge, and the upper section of the columnar tube is provided with an air-exhaustable semi-permeable membrane, so that the air bubbles in the liquid material in the columnar tube are well exhausted, and the precision and processing effect of a semiconductor processing process are improved.

The invention relates to an extraction method and application of orchid root polysaccharide, which can effectively extract orchid root polysaccharide GLHG0 from orchid roots and realize application in preparation of medicines for treating lung injury. The method comprises the following steps: cutting orchid roots into sections, performing reflux extraction, and concentrating; centrifuging to obtain a precipitate, adding water for suspension after deproteinization treatment, adding a sevage reagent, magnetically stirring, standing, layering, taking an upper-layer solution, concentrating under reduced pressure, adding H2O2, adjusting the pH value of a reaction system by using a NaOH solution, decolorizing, dialyzing by using a semipermeable membrane, and freeze-drying to obtain powder; dissolving with deionized water, centrifuging, taking supernate, and filtering; carrying out gradient elution, detecting and identifying, drawing an elution curve, carrying out vacuum concentration, dialyzing, freeze-drying, selecting a water component polysaccharide, preparing a polysaccharide solution, and purifying and separating. The raw materials are rich, the preparation method is simple and easy to operate, technical support is provided for development of novel medicines for treating lung injury, and practical application and popularization value is achieved.

The invention discloses a borehole wall collapse pressure analysis method and device based on mudstone hydration. Comprising the steps that a mudstone well wall is regarded as a semi-permeable membrane, chemical potential difference is introduced, and a drilling fluid invasion physical model and a multi-field coupling equation under the drilling fluid invasion mudstone multi-field coupling condition are established under the solute diffusion condition; based on the assumed condition of drilling fluid invading mudstone, a well circumference stress calculation model under the multi-field coupling condition and a hydration mechanical stress balance equation, obtaining an all-directional stress expression under the hydration effect and boundary conditions of well wall instability calculation of the drilling fluid invading physical model, and obtaining stratum well circumference stress under the hydration effect; the change rule of rock mechanical parameters along with the formation water content is analyzed, a borehole wall collapse pressure model after mudstone hydration is established based on linear elastic hypothesis of the mudstone borehole wall and superposition of formation well circumferential stress, and the well circumferential borehole wall collapse pressure after mudstone hydration is solved in combination with actual drilling data. The method can be used for reasonably predicting the borehole wall collapse pressure of a mudstone-containing interlayer or sand mudstone.

The application discloses a heat exchange and heat dissipation structure of pulse power conversion, which comprises a wooden conical shell, a bottom frame, a circular groove, a fine hole, a heat-absorbing liquid loading frame, a square grid cover, an air outlet channel, a U-shaped strip, a semi-permeable membrane, a micro water pump, a transmission rod, a capillary, a suction fan blade, a three-blade frame and a motor. The application has a reasonable structure, and through synchronous flow between hot air and heat-absorbing liquid, the application avoids the stagnation after heat conduction and exchange, and facilitates the conduction and diffusion of the capillary to the outside world, so that the effect of heat dissipation and cooling is achieved. The heat-absorbing liquid with low temperature is used for heat exchange with hot air again, and the hot air enters the semi-permeable membrane immersed in the heat-absorbing liquid, so that the heat-absorbing liquid is prevented from seeping out, and the heat of the hot air is efficiently conducted into the heat-absorbing liquid. The suction fan blade and the connecting part are different from the existing heat dissipation fan which is placed at the heat dissipation hole in the outside of the equipment, and are placed in the inside of the equipment, so that the closed property of the equipment is ensured and the equipment is not disturbed by the outside.

The utility model relates to the technical field of concrete additives, in particular to water reducing agent concentration equipment which comprises an inner cylinder, a heating assembly is arranged in the inner cylinder, a pressure increasing valve and a pressure reducing valve are communicated in the inner cylinder, a stirring structure is coaxially arranged in the inner cylinder, and the heating assembly is arranged in the stirring structure. A plurality of permeable membrane layers are arranged on the lower layer of the inner cylinder, the permeable membrane layers are circumferentially arranged on the cylinder wall of the inner cylinder, and each permeable membrane layer is of a semi-permeable membrane structure through which only water molecules pass. An outer cylinder is sleeved outside the inner cylinder, a permeable space is arranged between the outer cylinder and the inner cylinder, and a solvent reaction space is arranged in the inner cylinder. The solvent reaction space and the permeable space jointly form a solvent concentration chamber, and at least two solvent concentration chambers are arranged up and down and are communicated through a filtering channel. The utility model solves the technical problems of multiple times of concentration of the water reducing agent concentration equipment and improvement of the concentration efficiency and the concentration quality.

The utility model relates to a device for water-gas separation measurement in an unsaturated soil consolidation process. The device comprises a base, a pressure chamber and a vertical loading mechanism which are sequentially connected from bottom to top, the spiral line groove, the first three-way valve and the drainage measuring piece are communicated to form a drainage channel communicated with the soil sample containing space, and the first exhaust pipeline / second exhaust pipeline, the second three-way valve and the exhaust measuring piece are communicated to form an exhaust channel communicated with the soil sample containing space. The device has the beneficial effects that through the collaborative design of the base, the pressure chamber and the vertical loading mechanism, the spiral grooves of the upper and lower argil plates and the hydrophobic semi-permeable membrane exhaust pipelines are matched, water and gas discharged by consolidation of a soil sample are guided into the independent drainage and exhaust channels respectively, and the spiral grooves are combined with the water-permeable and air-impermeable characteristics of the argil plates to guide water to the drainage measuring piece; the hydrophobic semi-permeable membrane blocks moisture and only allows gas to enter the exhaust measuring piece through the exhaust pipeline, so that water-gas physical separation and synchronous accurate measurement are realized.

The invention relates to a concentration and purification device and method for preparing fructus cannabis functional peptide, belongs to the technical field of devices for preparing peptide, and aims to solve the background problems that in the prior art, when peptide is separated and purified from raw materials, impurities in the raw materials easily block a filter membrane, and two methods are generally adopted for solving the blocking problem: one method needs to clean the filter membrane, and the other method needs to clean the filter membrane; the other filter membrane needs to be replaced; the problem that the efficiency of separating and purifying the polypeptide is greatly reduced due to the fact that the filter membrane can be replaced only after the introduction of raw materials is stopped when the filter membrane is cleaned or replaced and the separation and purification work of the polypeptide needs to be interrupted is solved. The method comprises the following steps: opening a feeding pipe valve, pouring raw materials through a feeding pipe, and enabling the raw materials to fall on a semipermeable membrane; the raw materials are concentrated and purified through semipermeable membrane filtration, and the purified raw materials fall to the bottom of the reaction barrel to be collected; the purified raw materials can be taken out by opening a discharge port valve; the booster pump is electrified to pressurize the interior of the reaction barrel, so that the speed of the raw materials passing through the semipermeable membrane can be accelerated.

The application relates to the field of water treatment, and particularly discloses a semi-permeable membrane for seawater desalination and a preparation method thereof; the semi-permeable membrane for seawater desalination is composed of an aromatic polyamide membrane and an adsorption layer; the adsorption layer is composed of a chitosan membrane and rebound particles; the chitosan membrane comprises: a chitosan solution, graphene modified flexible fibers, glycerol and glutaraldehyde; the preparation method is as follows: the chitosan solution, the graphene modified flexible fibers, the glycerol and the glutaraldehyde are uniformly mixed and stirred, and are cast into a film; the rebound particles are uniformly sprayed on the surface of the film layer to obtain the adsorption layer; the aromatic polyamide membrane is uniformly sprayed with an ethyl cellulose solution around the periphery; then, the side of the adsorption layer provided with the rebound particles is adhered to one side of the aromatic polyamide membrane which is sprayed with the ethyl cellulose solution; and the semi-permeable membrane is prepared through drying; under the condition of long-time use, the semi-permeable membrane still has high separation efficiency, and the surface of the semi-permeable membrane is not easy to attach bacteria, viruses, aquatic organisms and other substances, so that the semi-permeable membrane has a long service life.

The application discloses a water film protection device, a matched water treatment device and a use method, and belongs to the technical field of sewage treatment equipment, and comprises a water film reaction component, wherein the water film reaction component comprises a semi-permeable membrane, the outer surface of the semi-permeable membrane is provided with first protrusions, the first protrusions are uniformly distributed along the circumferential direction of the outer surface of the semi-permeable membrane, flow channels are arranged between adjacent first protrusions, the flow channels are matched with second protrusions, and the second protrusions are located on the inner surface of a reaction pool shell; a drain port is formed in the bottom of the reaction pool shell, the semi-permeable membrane and the reaction pool shell are combined to form a cavity; the reaction pool shell is further provided with a transparent observation port, which is used for observing whether the water flow state in the cavity is laminar flow, the direct corrosion of corrosive wastewater on the shell of the device is isolated by using the water film, meanwhile, the reaction ions of the medicament can better enter the wastewater for reaction by using the semi-permeable membrane, the service life of the semi-permeable membrane is effectively prolonged by the continuous flushing of the water flow on the surface of the semi-permeable membrane, and the maintenance and regeneration of the semi-permeable membrane are facilitated.

The invention relates to the technical field of yak meat product processing, and discloses a household dry-type ripened yak meat processing method, which comprises: carrying out static liquid discharge treatment on fresh yak meat, loading into a polymer semipermeable membrane ripened bag, vacuumizing, and sealing, so that the bag body is attached to the surface of a meat sample under negative pressure; placing the packaged meat sample in an air-cooled refrigerator in an overhead manner by using a support frame, and ensuring that the periphery and the bottom of the meat sample are in contact with airflow for low-temperature ripening; performing turn-over treatment every 2-4 days in the ripening process; and after ripening, opening the bag and cutting off a hard shell layer on the surface. By limiting the water vapor transmission rate of the ripening bag and cooperating with a specific temperature, humidity and wind speed environment, the method disclosed by the invention realizes directional balanced migration of meat sample moisture in a family environment, improves the tenderness of the meat by virtue of endogenous enzymolysis, and weakens the mutton smell of yak meat. The method is simple and convenient to operate, the technical problems that the ripening is easy to decay and the dehydration is uneven in a household environment are effectively solved, and the prepared finished product is obvious in ripening flavor and convenient for subsequent storage.

System for operating a seawater electrolysis system (1) with seawater (9) as electrolyte for decomposing seawater (9) into hydrogen and oxygen, but without the use of semipermeable or polymer electrolyte membranes, wherein the seawater electrolysis system (1) comprises a seawater electrolyzer (4) filled with seawater (9) as electrolyte, wherein a plurality of cathodes (2) and anodes (3) are arranged parallel to each other and immersed in the seawater (9), wherein in the direction of flow of the seawater (9) the cathodes (2) and anodes (3) are arranged in series or alternately, and are connected via a control device (19) to at least one DC voltage (8), wherein an electrode heater (30) is integrated inside each of the electrodes (2, 3).wherein a hydrogen collection chamber (15) and oxygen collection chamber (16) are arranged directly above each cathode (2) and anode (3), and the cathodes (2) and anodes (3) are each attached to the associated hydrogen collection chambers (15) and oxygen collection chambers (16) via fastenings (24), and wherein the seawater electrolyzer (4) has at least one salinometer (34) which is electrically connected to the control unit (19).

The present application provides a controlled release tablet of Brivaracetam and a preparation method thereof, which comprises: a bilayer tablet core containing Brivaracetam, which is composed of a drug-containing layer and a push layer; and a semi-permeable membrane coating with a drug release hole arranged outside the bilayer tablet core, wherein the drug-containing layer contains an effective dose of Brivaracetam, a sustained-release material I, a sustained-release material II, a binder I and other pharmaceutical excipients; the sustained-release material I is carbomer, the sustained-release material II is selected from any one of hydroxypropyl methyl cellulose, polyethylene oxide and polyvinyl pyrrolidone, and the weight ratio of the sustained-release material II to the sustained-release material I is 1:1-5:1; and the push layer contains a hydrophilic polymer, an osmotic pressure regulator, a binder II and other pharmaceutical excipients. The controlled release tablet of Brivaracetam of the present application has a significant zero-order drug release feature, a stable blood drug concentration, a long-lasting drug effect, and a good medication compliance with once-a-day administration.