130 results about "Nylon filter" patented technology

The invention discloses a PM2.5 particulate mass sampler with four sampling channels: in the first sampling channel, the sampling head includes a PM2.5 cutter, a diffused solution container, Teflon filter membrane and nylon filter membrane; the sampling head in the second sampling channel includes a PM2.5 cutter and Teflon filter membrane; the sampling head in the third sampling channel includes PM2.5 cutter and two-layer quartz membrane; the sampling head in the forth sampling channel includes PM2.5 cutter and polycarbonate membrane.

The invention relates to a surface modification method of carbon nanotube and application of the surface modified carbon nanotube. The surface modification method comprises the following steps: (1) adding carbon nanotubes into concentrated nitric acid, heating and refluxing under stirring, cooling, centrifuging to obtain a solid matter, washing the solid matter with deionized water to pH 7, vacuum drying to obtain acidified carbon nanotubes, adding the acidified carbon nanotubes and thionyl chloride into an organic solvent, ultrasonic dispersing, stirring for reaction, distilling under reduced pressure to obtain a solid product, filtering the solid product with a nylon filter membrane, cleaning, vacuum drying to obtain carbon nanotube acyl chloride, adding carbon nanotube acyl chloride and sodium p-aminobenzenesulfonate into an organic solvent, ultrasonic dispersing, stirring for reaction, cooling the reaction solution to room temperature, suction-filtering with a nylon membrane, washing, and vacuum drying to obtain multi-wall carbon nanotubes modified by sodium p-aminobenzenesulfonate. The surface modified carbon nanotube prepared by the invention has significantly enhanced metal ion adsorption property and high recycle rate, and is easy to be separated.

The invention relates to a method for preparing a high thermoelectric performance silver selenide / nylon flexible composite film. The method comprises the following steps: (1) taking glycol dispersionliquid of the selenium nanowire, silver nitrate and a glycol solvent, stirring and mixing the the materials, and performing steps of reacting, centrifuging and washing to obtain a silver selenide nanowire; (2) taking the silver selenide nanowire prepared in the step (1) and dispersing the material in absolute ethanol, using a nylon filter membrane as a sinking bottom, and performing vacuum-filtering to obtain a silver selenide / nylon flexible film; and (3) finally, performing vacuum drying on the silver selenide / nylon flexible film obtained in the step (2), and then performing hot pressing to obtain the target product. Compared with the prior art, an inorganic phase and a flexible substrate of the composite film prepared by the invention has strong binding force, the composite film has superior flexibility, and is favorable for use on a flexible device.

The invention discloses a centrifugal dehydrator for a textile. The centrifugal dehydrator comprises a shell. An installation base is arranged at the bottom of the shell. An end cover is arranged on the upper portion of the shell. A rotating spindle is arranged at the center in the shell. A circle of dehydration baskets are arranged on the outer side of the rotating spindle. A drainage channel is arranged between the dehydration baskets and the inner wall of the shell. An upper pressing plate is arranged above the dehydration baskets. Nylon filter nets are suspended below the upper pressing plate. A direct current motor is arranged on one side of the shell. The direct current motor is connected with the rotating spindle. The direct current motor is provided with a sound insulating cover. The inner wall of the shell is provided with a waterproof sound-insulating cotton layer. Due to the fact that the waterproof sound insulating cotton layer is arranged on the inner wall of the shell, and the sound insulating cover is arranged on the direct current motor, the sound insulating effect is good; due to the fact that the nylon filter nets are arranged in the dehydration baskets, impurities on the textile are filtered out and stored, and dehydration holes in the dehydration baskets and the drainage channel are prevented from being blocked; the centrifugal dehydrator is simple in structure, convenient to use and wide in application prospect.

The invention relates to an agricultural organic waste anaerobic fermentation recovery biogas reaction apparatus and a recovery method thereof. The apparatus comprises an acidogenic fermentation phase reactor and a methanogenic phase reactor, a filtering device exists between the acidogenic fermentation phase reactor and the methanogenic phase reactor, wherein the acidogenic fermentation phase reactor adopts a continuous stirred tank reactor, the methanogenic phase reactor adopts an anaerobic expanded granular sludge bed reactor with the ratio of height to diameter of 9:1-10:1, a filtering material made of a nylon filter screen or a polyethylene filter screen is arranged in the filtering device, the aperture size of the filter screen is 0.5-3mm, and a total volume ratio of the acidogenic fermentation phase reactor to the filtering device to the methanogenic phase reactor is 2.5-3.5:1:1. The apparatus and the method can improve the degradation efficiency of agricultural organic wastes in an anaerobic fermentation system, alleviate the bottlenecks of the obstruction technology of equipment and pipelines, reduce the fluctuation interference of northern low temperature environment to the whole anaerobic fermentation system, and improve the running stability and the biogas generation rate of the system.

The invention discloses a method for improving the film uncovering property of a pomace papier-mache food, belonging to the technical field of fruit and vegetable food processing and aiming at being used in the production of pomace papier-mache food which is predominantly edible. The method comprises the steps of: by taking pomace after fruit juicing as a raw material, after carrying out pretreatment such as fine slicing, debitterizing and color protection on the raw material, mixing the raw material with a film forming agent, a plasticizer and a flavoring agent for beating and homogenizing, and degassing, film forming, primary drying, film uncovering, segmentation, secondary drying and packaging to obtain the pomace papier-mache food. By taking konjac dietary fiber and modified wheat gluten protein as the important film forming agent, and adopting nylon filtering cloth with 200-500 meshes as a film forming medium, the method improves the film uncovering property of the pomace papier-mache food, and solves the problem that industrialized continuous production cannot be realized as complete film uncovering is difficult in the industrialization of the pomace papier-mache food at present on the premise of ensuring the mechanical properties such as tensile strength and elongation at break of the pomace papier-mache food.

The invention relates to a preparation method for optimizing the thermoelectric performance of a silver selenide / nylon flexible composite film, and the method comprises the following steps: (1) takinga selenium nanowire as a template, enabling the selenium nanowire to react with silver nitrate in an ethylene glycol solvent at 40 DEG C, and carrying out separation, thereby obtaining a silver selenide nanostructure; (2) dispersing the silver selenide nanostructure in absolute ethyl alcohol, taking a nylon filter membrane as a substrate, and performing suction filtration and drying to obtain a nylon-silver selenide film; and (3) finally, carrying out hot pressing treatment on the nylon-silver selenide film obtained in the step (2) to obtain a target product. Compared with the prior art, themethod has the advantages that the high-performance flexible thermoelectric thin film can be prepared, and the thin film is used for manufacturing a high-output-performance thermoelectric device to supply power to a wearable electronic device.

The invention discloses a device and a method for evaluating the water invasion resistance of an oil well cement slurry in the setting waiting process. The device mainly comprises a magnetic stirrer 1, an electric conductivity tester 2 and a kettle body 3, the kettle body is arranged on the magnetic stirrer, a cement mortar 7, an iron filter screen 4 and a simulated stratum water 8 are arranged in the kettle body from outside to inside, the iron filter screen is connected and fixed to the kettle body through a buckle 10, 3-8 nylon filter screens 5 wind around the outer wall of the iron filter screen, the bottom of the iron filter screen is seamlessly pasted to the bottom of the kettle body, the simulated stratum water 8 is arranged in the iron filter screen, the bottom of the simulated stratum water 8 is provided with a magneton 9 matching with the magnetic stirrer, and the probe 11 of the electric conductivity tester 2 is placed in the simulated stratum water 8. The method is characterized in that the critical water speed of the stratum water interfering and destroying the cement mortar on the simulated cement-formation interface is measured to characterize the water invasion resistance of the oil well cement slurry in the setting waiting process. The device and the method have the advantages of reliable principle, simplicity in operation, and provision of reference and basis for the optimization and adjustment of the formula of the oil well cement slurry and the improvement of the water invasion resistance of the cement slurry.

The invention relates to the technical field of concrete, in particular to a dust removing device for concrete processing. The dust removing device comprises a base and a pulverizer body and a dust removing box fixedly mounted on the left and right sides of the upper surface of the base by bolts. The pulverizer body is communicated with an air inlet pipe, the tail end of the air inlet pipe is communicated with the upper end of the dust removing box, a filtering assembly is fixedly mounted on the upper portions of the left and right inner walls of the dust removing box by screws, an exhaust pipeline is vertically communicated with the right side of a cover plate at the upper end of the dust removing box, the middle of the cover plate at the upper end of the dust removing box is communicatedwith an inlet main pipeline, and dust in the pulverizer body is sucked to the dust removing box by a fan through an intake pipe and can be preliminarily intercepted and filtered off by matching of ametal rubber filter screen and a nylon filter screen. At the same time, the residual dust in the air can be filtered again by means of a sprinkler, and the filter assembly can be rinsed.

The invention discloses an air filtration material which is formed by stitching blended napping filter cloth and a nylon filter screen or teflon filter screen, wherein the blended napping filter cloth is formed by blended weaving of first polymer fiber and second polymer fiber at the ratio of 1:1; and a napping face of the blended napping filter cloth fits the nylon filter screen (or teflon filter screen). According to the manufacturing method of the air filtration material, low-cost and widely-applied polypropylene fiber, polyester fiber, etc. are selected, and a simple napping and stitching technological mode is adopted. The air filtration material can highly-efficiently adsorb small granular dust in the air and can be conveniently applied in various existing air-borne dust filtration units.

The invention discloses a preparation process of scale jelly, relating to the technical field of processing of fish products. The preparation process comprises the following steps: (1), unfreezing and rehydrating scales; (2), cleaning; (3), pretreating, namely, respectively performing acid treatment, alkali treatment and enzyme treatment on the scales, cleaning the scales with flowing tap water until the pH is 7.0, washing twice with distilled water, draining the wet scales until no water drops, placing the scales in a beaker, adding distilled water in a certain ratio, and sealing with aluminum foil paper to prevent water from evaporating; (4), extracting gelatin, namely, extracting gelatin under the conditions that the temperature is 70-100 DEG C, the time is 0.5-4 hours, the ratio of the wet scales to the distilled water is 1 to (3-8) and the pH of water for extracting the gelatin is 7.0; (5), suction-filtering, namely, performing vacuum suction filtration by a Buchner funnel, and filtering scale residues with nylon filter cloth; and (6), gelling, namely, gelling the scale gelatin in a container at a temperature of -10 to 10 DEG C. The scale jelly is high in yield, and high in calcium content; nutritional ingredients are not damaged; the preparation process is simple, gelatin is convenient to extract, and the cost is low.

The invention belongs to the technical field of analytical chemistry and discloses an LC-MS (liquid chromatography-mass spectrometry) method used for screening an antioxidant in an elastomer seal of adrug packaging. The method comprises the following steps: breaking a to-be-detected elastomer into particles with the size of 5mm*5mm, weighing 0.5g of a broken rubber plug, loading the broken rubberplug into a microwave digestion tube, adding 10ml of dichloromethane into the microwave digestion tube for swelling overnight, performing microwave digestion at the temperature of 40 DEG C for 45minand cooling to room temperature; filtering with a glass hopper, removing the elastomer particles, performing vacuum rotary evaporation on filtrate, removing a dichloromethane solvent, dissolving residues with 8ml of methanol through ultrasonic oscillation after evaporation, transferring dissolved solution into a 10ml of measuring flask and enabling the volume of the dissolved solution to be constant with methanol; taking the solution after the volume of the dissolved solution is constant, filtering the solution with a 0.45mum of nylon filtering membrane and detecting filtrate with an LC method. The LC-MS method has the advantages of being high in accuracy, good in sensitivity, short in detection time and strong in qualitative and quantitative accuracy; the LC-MS method is strong in tolerance to a matrix, the coverage of the antioxidant is comprehensive, and degradation products of the antioxidant are monitored meanwhile.

The invention discloses a method for treating industrial wastewater by a microbial agent. The device comprises an aerobic strain tank, an anaerobic strain tank, a grid, a regulating tank, a flocculation tank, an anaerobic reaction tank, an aerobic aeration biofilter tank and a methane recovery device. The method comprises preparation of a culture medium, cultivation of anaerobic bacteria, cultivation of aerobic bacteria, cultivation of flocculating bacteria, expansion and enhancement of a strain, domestication and cultivation, sewage filtration based on the grid, adjustment of pH in an adjustment tank, feeding into the flocculation tank, addition of flocculating bacteria, standing of the sewage in the anaerobic reaction tank for 8-10h, stirring, recovery of methane, feeding of sewage intothe aerobic aeration biofilter tank, filtration based on a three-layer special-shaped fiber nylon filter cloth, secondary filtration based on gravity, ultraviolet lamp disinfection, discharge after detection, and return of unqualified sewage into the anaerobic reaction tank. The device has good sewage treatment effects, is free of chemical reagents, prevents secondary pollution, has a low ventilatory capacity, a small stirring amount and a small sewage flow amount, has small discharge of odor and excess sludge and realizes energy saving and emission reduction.

The invention discloses a suspension culture method for intestinal cells of stomachless lukewarm water fish. According to the invention, collected intestinal cell suspension is mixed together for refrigeration and centrifugation for 10 min at 1500 Xg; collected cell deposition is suspended with a solution -3 anew and subjected to oscillation incubation at a temperature of 25 DEG C for 15 min, andsuspension of intestinal cells is filtered with a blood nylon filter having a bore diameter of 100 -mu m and subjected to refrigeration and centrifugation for 10 min at 1500 Xg; obtained cell deposition is suspended in a solution -3 anew for subsequent usage in tests; the integrity of cell membranes is detected by using the method of 0.5% typan blue exclusion; cell suspension and dyes are isopyknicly mixed and added on a counting panel drop by drop, a coverslip is covered, and after the counting panel is stood for one minute, the number of dead cells, the total number of cells and the cell viability are calculated; the cell suspension is subjected to refrigeration and centrifugation for 10 min at 1500 Xg, and the activity of a liquid supernatant and cell deposition LDH is determined respectively; the cell suspension is lightly and evenly mixed, a desired amount of the cell suspension is taken for oscillation incubation at a temperature of 26 DEG C, a rotate speed is 70 revolution / min,and total culture time is 240 minutes. The invention brings forward the suspension culture method for intestinal cells of stomachless lukewarm water fish for the first time.

The invention discloses a processing method of wheat germ bean curd, belonging to the field of food processing. The processing method comprises the following steps of: firstly weighing a certain amount of wheat germ, placing the wheat germ into a high-pressure sterilizing device, heating at the temperature of 112 DEG C for 60 minutes to inactivate activity of lipoxidase in the wheat germ, adding water to soak the wheat germ in massic volume ratio of 1: (4.1-4.3), grinding into pulp, and filtering by virtue of a 80-100 meshes nylon filter screen to obtain wheat germ juice for later use; and then carrying out the following processes on soybean: soaking, pulp grinding, filtering, mixing and pulp boiling, cooling and pulp-slag separating, curdling, filling and sizing, and recooling. In the mixing and pulp boiling process, the germ juice is added into soybean milk in the volume ratio of 1: (4-5), the germ juice and the soybean milk are uniformly mixed, and then cooking is carried out. A composite coagulating agent is formed by compounding gluconic acid delta lactone with single hard fatty acyl glyceride in mass ratio of (10-13): 1. Texture characteristics of the wheat germ bean curd obtained by adopting the processing method are improved compared with those of pure soybean lactone bean curd sold in the market, hardness, elasticity and chewiness of the processed bean curd are improved, and adhesive power is reduced; milling by product is taken as raw material in the processing method disclosed by the invention, thus cost is low; and the wheat germ bean curd preparation process is simple, is short in flow, is convenient to control and popularize and has wide market prospect.

The invention discloses a method for extracting polyphenol from passion fruit peel. The method comprises the following steps: freeze-drying and crushing the passion fruit peel; carrying out ultrasonic wave-ethanol assisted extraction in a solution 30-80% ethanol under an ultrasonic power of 200-400 W at a temperature of 30-70 DEG C for 5-35 min, filtering the obtained solution by a 0.45-0.80 [mu]m nylon filter, and concentrating the filtered solution; and separating and purifying the obtained concentrate by macro-porous resin with the particle size of 0.30-1.25 mm, and carrying out vacuum freeze drying to obtain powder of polyphenol in the passion fruit peel. The extraction method ensures the extraction rate and the purity of the polyphenol through combining ultrasonic wave-ethanol assisted extraction, macro-porous resin separation and purification and vacuum freeze drying technologies. The extraction rate of the polyphenol in the passion fruit peel can reach 33.95-50.35%. The extraction method is a new method for effectively utilizing the passion fruit peel, and can change wastes into valuables.

The invention provides a method for measuring insoluble substances in sodium humate, and belongs to the field of chemical experiment detection. According to the technical scheme, the method comprises the following steps: S1, extracting the insoluble substances; S2, carrying out suction filtration; S3, carrying out weighing; and S4, calculating a result. The method has the beneficial effects that nylon filter cloth is adopted, so that the sodium humate is not adsorbed on the nylon filter cloth, and only the water insoluble substances are left on the filter cloth; and the filtration is changed into the suction filtration, so that the water consumption is reduced, the detection time is shortened, the efficiency is improved, and the detection result is accurate and stable.

The invention provides a bearing cleanliness detection method and relates to an aircraft bearing cleanliness detection method. According to the bearing cleanliness detection method, the technical problem that a rolling bearing is damaged due to the pollution is solved. The method comprises the following steps: putting a wetted 1.2-micron micro-hole nylon filter membrane into an electrically heated drying oven, drying at 100+ / -5 DEG C for 30 minutes, carrying out weighing, and recording data X; and carrying out high-pressure spraying cleaning on a to-be-detected bearing by virtue of a spray gun, carrying out ultrasonic concussion, centrifugation and suction filtration, recording weight Y of the filtered 1.2-micron micro-hole nylon filter membrane, and calculating cleanliness weight Y-X, thereby finishing the bearing cleanliness detection. The production process is optimized and improved by virtue of analysis measures of an optical microscope and a scanning electron microscope and physical and chemical information representing bearing surface residual particles, and the cleanliness control level is improved. The bearing cleanliness detection method belongs to the bearing cleanliness detection field.

The invention discloses a washable garbage bin capable of collecting and cleaning vomits. The washable garbage bin comprises a garbage bin body; the garbage bin body is provided with a collecting mechanism; the collecting mechanism is provided with a containing platform, a hemispherical groove, a handrail, a non-slip mat, a water outlet, a collecting box, a support platform, a filter box, a waterdrainage hole, hooks, a nylon filter bag, a collecting flexible pipe, and a cleaning mechanism; the garbage bin body is internally provided with a sewage collecting and processing mechanism; the sewage collecting and processing mechanism comprises a water outlet, a purification water tank, a water inlet, a water suction pump, a water-pumping pipe, a water inlet pipe, a water storage tank, a support leg, an activated carbon adsorption box, a connection water pipe, a water guiding pipe, and a drainage mechanism; the garbage bin body is provided with a cleaning mechanism; the cleaning mechanism comprises a faucet, an electromagnetic valve, an infrared distancer, a spray pump, a fixed bracket, a spray pipe, and a water injection nozzle; and one side of the upper surface of the garbage bin bodyis provided with a controller. The washable garbage bin capable of collecting and cleaning the vomits has the beneficial effects of simple structure and high practicability.

The invention discloses a spliced dustproof and explosion-proof electric appliance assembly, which relates to the technical field of explosion-proof electric appliances, and solves the problems that according to an existing electric appliance assembly, the arrangement position of a heat dissipation and ventilation filter screen is not reasonable enough, the heat dissipation and ventilation filter screen is mostly directly exposed windward and lack of shielding, and dust accumulation is prone to occurring. The invention relates to a spliced dustproof and explosion-proof electric appliance assembly, which comprises an electric box shell, the whole electric box shell is of a square structure, a rectangular cover plate is slidably inserted into an opening in the front end of the electric box shell in a covering mode, a square rear end cover is locked and sealed to the rear end of the electric box shell in a covering mode, four vertical supporting positioning shafts are symmetrically welded and fixed to the left side and the right side of the middle of an upper side plate and a lower side plate of the electric box shell, and the four vertical supporting positioning shafts are slidably sleeved with two force transmission frames. And four hanging shafts are symmetrically welded on a lower side plate of the electric box shell. The two synchronous frames can drive the two transverse supporting brush rods to slide together to brush and clean the nylon filter screen when the steel cover is pulled down to check screen data, so that the trouble of additionally cleaning the filter screen manually at regular intervals is saved.

The invention relates to a ruminant rumen fluid collecting device, and aims to solve the technical problems that a collecting tube is easily blocked by rumen content when ruminant rumen fluid is extracted by inserting the tube from an oral cavity, the rumen fluid is polluted as a traditional rumen fluid collection device is provided with a manual negative-pressure pump and the rumen fluid is filtered, and activities of rumen microorganisms are affected in the prior art. The ruminant rumen fluid collecting device comprises a circulating water vacuum pump, an exhaust tube, a collecting bottle lower portion, a filtering plate, a fixing plate, a collecting bottle upper portion, a collecting tube, a steel tube, an opener, a fixing belt and a nylon filter screen, an extraction opening of the circulating water vacuum pump is communicated with the collecting bottle lower portion through the exhaust tube, the collecting bottle lower portion is connected with the collecting bottle upper portion in a threaded manner, the collecting bottle upper portion is communicated with one end of the collecting tube, the other end of the collecting tube is communicated with the steel tube, one end of the steel tube far away from the collecting tube is hemispherical, and collecting holes are uniformly formed in the outer wall of the collecting tube. The device is used for rapidly extracting ruminant rumen fluid.

The invention is a ship-carried Eichhornia crassipes solm automatic dehydrator, composed of salvage and transportation system, dehydrating system and purifying system. The salvage is completed by salvage and transportation system, and it can implement extensive-depth salvage procedure by depth adjusting rod. The hole conveyer belt can eliminate most adhesive water in the transporting course. The dehydrating system can meet the dehydrating requirements at different degrees by roller adjusting rod. The emersion water can achieve national land water effluent standard through many layers of different-aperture nylon filter net and sand filter, implement discharging without pollution. It has simple structure and can be installed on various ships and water surfaces for continuously working, convenient to use and maintain, low-cost and high-working efficiency.

The invention discloses a trapping device of cladoceran insects in a crab pond and a method of the trapping device. The trapping device comprises a submerged pump and an undulating lamp, wherein the submerged pump is arranged in the crab pond in an inverted manner; the top ends of the submerged pump and the undulating lamp are respectively fixed on a fixed rod; a positioning rod is adopted for fixing the submerged pump and the undulating lamp; a water discharging pipe is arranged at the water discharging position of the submerged pump; a nylon filtering net bag sleeves the water discharging pipe. The trapping device disclosed by the invention has the advantages that by utilization of the principle of phototaxis of insects, the undulating lamp is fixed above the water surface of the crab pond, the submerged pump is erected under light, a suction opening of the submerged pump faces upwards, the submerged pump is inverted in water, the undulating lamp and the submerged pump are started at night, the insects gather together around the light, the insects near a pump opening are sucked into the submerged pump by the submerged pump and are discharged into the nylon filtering net bag by the water discharging pipe; the whole equipment is low in cost, and can be applicable to crab culture ponds, fish ponds and shrimp ponds; farmers have no need of using insecticides, so that the risk of investment and the insecticides is greatly reduced, no pollution or insecticide residue is caused to shrimps, crabs and fish, and the green and environment-friendly effects are achieved.

The invention relates to a novel sewage filter apparatus. The novel sewage filter apparatus comprises a support and a filter shell, wherein a water inlet and a water outlet are respectively formed above the left side wall and below the right side wall of the filter shell, an oblique baffle plate which inclines downwards from left to right is arranged below the water inlet, circular holes are uniformly formed in the oblique baffle plate, a conical support is arranged below the oblique baffle plate, a two-layer metal filter net is arranged on the upper end of the conical support, the lower end of the conical support is provided with a nylon filter net, a cylindrical filter barrel is also arranged below the conical support, and the bottom end of the cylindrical filter barrel is also connected with a barrel driving mechanism for driving the cylindrical filter barrel to rotate. By adopting the structure, impurities in sewage can be filtered in multiple layers, so that the filter efficiency and filter quality of the sewage can be effectively guaranteed.

The invention discloses a method for measuring the total cell wall matter content of tobacco, which belongs to the technical field of tobacco analysis and detection. The method comprises the following steps of: weighing a certain number of crushed tobacco samples with the fineness of 40 to 80 meshes, wrapping the crushed tobacco samples by using 1,000-mesh nylon filter cloth and tightening the wrapped samples; arranging 24 tobacco samples into a Soxhlet extraction device; adding 2.0 liters of mixed solution of petroleum ether and acetone, performing Soxhlet extraction for 48 hours, and observing extract liquor by using eyes until the extract liquor is colorless; arranging the Soxhlet-extracted samples into a beaker into which water in an amount 20 times the weight of the samples is added, heating the solution until the solution is boiling, keeping boiling the solution for 1 hour, performing desugaring, filtering the solution by using an abrased glass crucible, discarding the water and squeezing the samples to dryness by using hands; repeating the operations for four or five times; arranging the extracted samples into a drying oven, and drying the samples for 2.5 hours at 100 DEG C; and arranging the dried samples into a dryer with allochroic silicagel, cooling the samples to room temperature, weighing the samples, and obtaining the total weight of cell wall matters of the tobacco by subtracting the weight of the wrapping nylon filter cloth from the weight obtained by the weighing. The method has the advantages of simplicity, fewer toxic hazards and pollutions, low cost, high efficiency and analysis data accuracy.

A welding fume cleaner provided with flexible gas absorbing arms is disclosed. The welding fume cleaner includes a cleaner main body. A control panel is fixed on the external surface of the cleaner main body. A side surface of the cleaner main body is provided with a power supply plug. A position, on the side surface of the cleaner main body, close to the upper end of the power supply plug is provided with a maintenance door hinge. An oil water separator is fixed to the side surface of the cleaner main body. Hooks are fixedly mounted on upper four corners of the cleaner main body. The upper end of the cleaner main body is also provided with two air outlets. The welding fume cleaner is provided with the two flexible gas absorbing arms, thus enhancing gas absorbing effects, increasing the gas absorbing efficiency and making cleaning performance of the welding fume cleaner improved. In addition, a metal rubber filter screen and a nylon filter screen are provided, and therefore, welding fume can be deeply cleaned, harm of welding fume to operators is reduced, an operation environment is more ideal and the welding fume cleaner has a good application prospect.

The invention discloses an antibacterial marc paper-type edible packing film and belongs to the technical field of food package. The antibacterial marc paper-type edible packing film is characterizedin that under the condition of adding no chemical preservatives or bacteriostats, two or more marcs are taken as raw materials, blended, pulped, homogenized, film-formed after being deaerated, and dried to obtain an end product. Compounding and mixing are performed by use of the difference between functional ingredients of the two marcs; canna edulis ker powder and modified wheat gluten protein serve as forming agents; nylon filter cloth is taken as a film-forming medium; the antibacterial property and the edibility of the marc paper-type edible packing film are improved on the basis of guaranteeing the favorable film uncovering capability of the marc paper-type edible packing film; the problems that a conventional marc paper-type edible packing film cannot be stored for a long time due topoor antibacterial property and is short in shelf life are solved; and meanwhile, environmental pollution caused by marc waste is reduced.

The invention discloses a mycorrhizal ecological floating bed suitable for water purification and landscaping of small lakes. The mycorrhizal ecological floating bed comprises a floating bed floatingbody and a plurality of planting baskets, a plurality of planting holes are formed in the floating bed floating body, the planting baskets are placed in the planting holes in the floating bed floatingbody, nylon filter membranes with the pore diameter of 0.45 micron are arranged on the lower sides and the bottoms of the inner walls of the planting baskets, and the planting baskets are filled witha matrix and planted with aquatic plants inoculated with AMF. According to the mycorrhizal ecological floating bed provided by the invention, the purification capacity of aquatic plants to sewage isenhanced by utilizing AMF, the formation of mycorrhizal symbionts at the roots of the aquatic plants is promoted by utilizing the drop reoxygenation of a fountain and the interception effect of the 0.45-micron nylon filter membrane, and the sewage purification efficiency is effectively improved.

The invention discloses a mouse pancreas infiltrated immune cell separation method which comprises the following steps: digesting pancreas tissue by using mixed digestive juice of collagenase IV, DNAenzyme I and RPMI1640, filtering by using a nylon filtering net of 100 [mu]m, performing density gradient centrifugation, collecting middle-layer cells after centrifugation, and analyzing cell yield,a survival rate and cell types. Results show that (3.0+ / -1.2)*10<5> cells can be collected from each mouse, the survival rate of separated cells is (96.7+ / -2.2)%, flow cytometry shows that the contentof CD45 positive T cells is (97.1+ / -3.5)%, the content of CD3 positive T cells is (61.2+ / -5.7)%, the contents of CD4 positive T cells is (49.1+ / -5.1)%, the content of CD8 positive T cells is (47.2+ / -5.3)%, and the content of CD19 positive B cells is (32.8+ / -4.3)%. The conclusion is that the method is simply, efficient and stable, a great number of cells of a high survival rate and high purity arecollected, and a stable and reliable method is provided for related research on separation of pancreas infiltrated immune cells.

The invention relates to a culturing method for phytoplankton, in particular to a culturing method for chlorophyta scenedesmus phytoplankton. The method comprises the following steps of performing shading treatment on the periphery and bottom of an open container by virtue of a shade, injecting water into the container, wrapping freshwater fish compound feeds and dry clay powder with a nylon filter screen to form a feed bag, and sinking the feed bag to the bottom of the container, wherein the proportion of water, the freshwater fish compound feeds to the clay powder is (0.5-4L):(1-4g):1g; rotting the feed bag under an airtight condition of 18 to 35 DEG C, and removing the feed bag when the total nitrogen content of a water body reaches 15 to 25mg / L; removing the shade from the open container, performing aeration treatment on the water body for 8 to 20 days to obtain high-density and high-purity chlorophyta scenedesmus phytoplankton. The culturing method provided by the invention is simple, convenient to implement and low in culturing cost, the raw materials are readily available, and can be continuously used for many times, and great economic benefits are created.