345results about How to "Long storage time" patented technology

The utility model discloses a full-automatic whole blood sample pretreatment device for separating plasma through immunomagnetic beads. The full-automatic whole blood sample pretreatment device comprises a plasma separation mechanism for extracting a plasma sample from a whole blood sample, a conveying mechanism for conveying a blood collection tube and a sample cup, and a feeding mechanism for providing the sample cup, the plasma separation mechanism comprises a sample loading and shaking module for uniformly mixing a whole blood sample in the blood collection tube, a puncture sampling module for collecting the whole blood sample or the plasma sample, and a magnetic separation module for separating the plasma sample; the magnetic separation module comprises an oscillation assembly, a magnetic attraction assembly and a reaction cup, and freeze-dried immunomagnetic beads and an antibody reagent are pre-stored in the reaction cup. The device provided by the utility model can be used for comprehensively and automatically pretreating a whole blood sample and improving the quality and the efficiency of plasma separation.

The invention discloses a water quality sampling device for environment detection, which comprises a connecting plate, a connecting block is fixedly connected to the side wall of the connecting plate, a connecting ring is fixedly connected to one side of the connecting block, a driving blade is rotatably connected to the inner wall of the connecting ring, and an electric rotating rod is fixedly connected to one side of the driving blade. The invention relates to the technical field of water quality sampling devices. Through cooperation of a detector, a sliding circular plate, a fixed cone, a sealing plug, a preservative leather bag, a second electric push rod, a telescopic plate, a push plate, a limiting groove, a sealing bin, an extrusion plate, a reset spring, a limiting pipe and an electric telescopic pipe, a storage test tube injected with sampling water can be automatically sealed, and deterioration caused by excessive contact between a water source and air is avoided; meanwhile, a preservative can be automatically added into the sampling water, the preservation time of the sampling water is prolonged, and after a sealing plug in a limiting pipe is used up, a detector detects and reminds an operator that the sampling water is input into a storage test tube in equipment.

The invention relates to the technical field of microorganisms, in particular to a microbial composition for a water-soluble fertilizer and a preparation method thereof.The preparation method comprises the steps that a microbial complex microbial inoculant is immobilized through modified biochar to obtain the modified microbial complex microbial inoculant, and then the modified microbial complex microbial inoculant is modified through a coating material and an ascorbic acid aqueous solution; and uniformly mixing the microbial composition A and the microbial composition B to obtain the microbial composition for the water-soluble fertilizer. According to the invention, the biochar not only can provide nutrients for microorganisms, but also can create a relatively stable living environment; a coating material is sodium alginate and ascorbic acid, so that the stability of the biochar immobilized microorganisms can be further maintained, and the influence of ultraviolet rays on the microorganisms can be reduced. The prepared microbial composition for the water-soluble fertilizer can effectively play roles in fixing nitrogen, dissolving phosphorus, preventing plant diseases and insect pests and promoting plant growth, and has a wide application prospect compared with the prior art.

The invention relates to an elevation control and precise regulation and control method for frozen sand mold additive manufacturing in a time sequence space. According to the method, a mathematical model that the thickness of floating sand changes along with time due to moisture heat exchange of the frozen sand mold in air is established, and the thickness of the floating sand of frozen sand molds with different curved surfaces under the parameter conditions of different environment temperatures, time scales, sand mold materials, moisture contents and the like is predicted and fed back; and in the freezing printing process, real-time adhesive and height compensation is carried out on sand molds at different wall thicknesses, and the dimensional precision and geometric precision of the frozen sand molds are protected to a certain extent. According to the method, the problem of dimensional accuracy error caused by floating sand generated by heat exchange in air in the manufacturing and subsequent placing processes of the frozen sand mold is effectively solved, and the dimensional accuracy of the sand mold during casting is ensured.

The invention discloses a plastic refractory for repairing a furnace lining of an intermediate frequency furnace and a preparation method thereof, and belongs to the technical field of refractory materials for intermediate frequency furnaces. The plastic refractory comprises the following components in percentage: 20%-30% of alumina, 35%-45% of mullite, 5%-15% of kyanite, 5%-10% of a plasticizer, 3%-7% of glucose, 2%-5% of silicon nitride and 10%-15% of modified aluminum polyphosphate. Wherein the modified aluminum polyphosphate is prepared by the following method: reacting aluminum polyphosphate, silica powder, polyvinyl alcohol and water at 180-220 DEG C, and cooling to room temperature to obtain the modified aluminum polyphosphate. The plastic refractory for repairing the furnace lining of the intermediate frequency furnace is low in manufacturing cost, has excellent adhesive property, high temperature resistance and thermal shock resistance, further has the advantages of long service life, long storage time and the like, and solves the problems of poor adhesive property, short service life, short storage time and the like of the plastic refractory in the prior art.

The invention discloses a formula and a preparation method of milk skin yoghurt. The milk skin yoghurt comprises the following raw materials: fresh milk, milk skin, sugar, cream, condensed milk, milk powder, cheese powder, protein powder and carotene. The invention also provides a preparation method of the milk skin yoghurt. The preparation method comprises the following steps: step 1, preparing materials; step 2, cooking: putting the fresh milk into a container, heating the fresh milk in a boiling water bath, and then cooling the fresh milk; step 3, blending: stirring the cooled fresh milk, sequentially adding the rest ingredients, and then cooling; step 4, fermentation: putting the mixture into a fermentation machine for fermentation for more than 8 hours; and step 5, inspecting and packaging. According to the milk skin yoghourt food processed by the method disclosed by the invention, through coordination and complementation of probiotics and various nutritional ingredients, the nutritional value in milk is maintained, the nutritional and health-care effects can be provided, and the milk skin yoghourt food is delicious in taste, unique in taste and wide in market prospect.

The invention discloses a synchronous monitoring system and method for non-methane total hydrocarbon and volatile organic compound components, and belongs to the technical field of environmental monitoring. Comprising an adsorption tube and a monitoring assembly, the adsorption tube is detachably connected with the monitoring assembly, the monitoring assembly comprises a focusing tube, a six-way valve, a four-way valve and a gas chromatograph, and the four-way valve and the six-way valve are each provided with an emptying flow path; the six-way valve is respectively communicated with the focusing tube and the capillary chromatography sampling assembly, and the capillary chromatography sampling assembly, the capillary chromatographic column and the mass spectrometry detector are sequentially communicated; a heating assembly is arranged outside the adsorption tube, a temperature control device is arranged outside the focusing tube, a thermal desorption temperature control area is arranged outside the focusing tube, the six-way valve and the four-way valve, and a column oven is arranged outside the capillary chromatographic column. Synchronous monitoring of non-methane hydrocarbon and VOCs components is achieved through the same monitoring assembly, the occupied space is reduced, the monitoring range is expanded, meanwhile, the sampling volume of the adsorption tube is flexible and controllable, and the sample preservation time is long.

The invention belongs to the technical field of fruit and vegetable preservation, and provides a preparation method of a silver nanoparticle / titanium dioxide / polydopamine modified montmorillonite antibacterial agent and application of the antibacterial agent in a copolyester / poly (butylene adipate-succinate)-terephthalate degradable film. The preparation method comprises the following steps: firstly preparing montmorillonite modified by polydopamine, and then mixing the montmorillonite modified by polydopamine with AgNO3 / TiO2 composite sol to prepare the antibacterial agent AgNPs / TiO2 / PMMT. The preparation method comprises the following steps: preparing an antibacterial agent, blending the antibacterial agent with PBTF and PBAT to prepare the antibacterial degradable composite air-conditioning film, and the composite air-conditioning film has antibacterial performance, excellent mechanical performance and air-conditioning performance, and can be applied to fruit and vegetable preservation.

The invention discloses a concentrated platelet product, a production process, a platelet preserving fluid and a storage method, and belongs to the technical field of biology. The production process comprises the following steps: taking fresh anticoagulant whole blood, shaking and depolymerizing; performing light centrifugation on the fresh anticoagulant whole blood subjected to shaking depolymerization to obtain upper-layer platelet-rich plasma I and lower-layer blood cells I; performing gradient centrifugation on the lower-layer blood cells I to obtain upper-layer and lower-layer red blood cells II containing an albuginea layer, plasma and a small amount of red blood cells; performing gradient centrifugation on the upper layer to obtain platelet-rich plasma II and lower-layer red blood cells III; combining the platelet-rich plasma I and the platelet-rich plasma II to obtain mixed platelet-rich plasma I; centrifuging the mixed platelet-rich plasma I to obtain upper-layer mixed platelet-rich plasma II and lower-layer red blood cells IV; centrifuging the upper-layer mixed platelet-rich plasma II to obtain upper-layer plasma and lower-layer platelets V; and adding a certain amount of plasma or platelet preserving fluid into the platelet V to obtain the concentrated platelet product.

The invention provides a micro-fluidic detection card capable of storage and sequential acquisition, which is sequentially laminated from bottom to top: a substrate layer, a sensing layer and a micro-fluidic chip layer, and the sensing layer comprises a sensing unit; a plurality of detection cavities are formed between the sensing layer and the micro-fluidic chip layer; the sensing unit is integrated in each detection cavity and is also suitable for being connected with a detection serial port; the micro-fluidic chip layer is connected with a central liquid storage cavity, and is also provided with an inlet and an outlet which are communicated with the central liquid storage cavity, and a micro-channel which is sequentially communicated with the inlet, the central liquid storage cavity and the outlet, and the micro-channel sequentially forms a positive guide Tesla valve and a negative guide Tesla valve in the flow direction from the inlet to the outlet; according to the invention, a plurality of detection cavities are designed on the improved Tesla valve structure, micro-liquids refluxed at different times can be separated by using the flow blocking characteristic of the reverse guide Tesla valve, and micro-liquid data at different times can be detected and contrastively analyzed, so that the micro-liquid detection device is suitable for micro-liquid detection.

The invention discloses an artificial feed for tomato leafminers, and a preparation method and application thereof. The feed for tomato leafminers comprises cellulose, lactic acid casein, wheat germ powder, Wesson salt, soybean powder, agar, sucrose, glucose, cholesterol, linolenic acid, linoleic acid, soybean oil, a composite preservative solution, a composite antibiotic solution, a composite vitamin B solution, a host plant homogenate and distilled water. The main raw materials of the feed are low in price, the preparation method of the feed is simple, the obtained artificial feed is mildew-proof and antiseptic, and the feeding effect is basically consistent with the level of the natural host. The larvae cultured with the feed are healthy and uniform in age, and the purpose of supplying a standard insect source for tomato leafminers can be achieved throughout the year and in successive generations.

The invention discloses a treatment method for relieving respiratory climacteric fruit and vegetable oxidation browning, and belongs to the technical field of fruit and vegetable storage and fresh-keeping processing. The method comprises the following steps: soaking treatment equipment and fruits and vegetables with NaClO or 75% ethanol solution, washing with deionized water, draining, and cutting into fresh-cut fruit and vegetable slices; soaking the pretreated fresh-cut fruit and vegetable slices in a 2-50 [mu] mol / L theanine solution, taking out the fresh-cut fruit and vegetable slices after the fresh-cut fruit and vegetable slices are completely soaked, and removing moisture on the surfaces of the fresh-cut fruit and vegetable slices; and storing the fresh-cut fruit and vegetable slices, wherein the sealed storage temperature is 0.5-8 DEG C. The treatment method can effectively slow down browning of the fresh-cut fruits and vegetables, is pollution-free to the environment, safe and sanitary, can improve the edible flavor of the fresh-cut fruits, and has the advantages of being green, environment-friendly, high in quality and low in price; the method not only can be used for relieving oxidation browning of fresh-cut apples, pears and yellow peaches, but also can be applied to browning and preservation of other breath climacteric fruits and vegetables, weight loss is reduced, and the method has good economic value.

The utility model discloses a slider structure, a telescopic boom and a telescopic boom forklift, and relates to the technical field of forklifts, the slider structure comprises a slider body, the slider body is provided with a first end face, the first end face is provided with an oil guide groove and an oil storage groove, the side face of the slider body is provided with an oil injection hole, and an oil duct is arranged in the slider body. The oil channel communicates with the oil guide groove and the oil injection hole. According to the sliding block structure, the telescopic boom frame and the telescopic boom forklift loader, lubricating oil can be quickly and conveniently supplemented, the structure is simple, the cost is low, in addition, the storage time is long after the lubricating oil is supplemented, the lubricating oil does not need to be frequently supplemented, and the practicability is better.

The invention belongs to the technical field of solid rocket engine lining materials, and particularly discloses a prepolymer lining material and a preparation method thereof.The prepolymer lining material comprises a component A and a component B. The component A comprises, by weight, 1-10 parts of a component B, 1-10 parts of a component C and 1-10 parts of a component D, the component A is prepared from the following raw materials: 100 parts of an adhesive matrix material, 14 to 30 parts of isocyanate, 0 to 2 parts of a cross-linking agent, 12 to 30 parts of powdery reinforcing filler, 0.5 to 1 part of an anti-aging agent, 0.3 to 1 part of a bonding agent, 0 to 4 parts of a plasticizer and 0 to 1 part of a catalyst; and the component B is 6-8 parts of a curing agent. According to the invention, the component A is prepared into two components and can be stored for a long time, and meanwhile, the component A and the component B can be molded in an engine shell after being mixed according to a ratio when the component A is pre-polymerized and the lining is constructed, so that a sagging-free state is quickly achieved, the process time and the process cost are further saved, and the lining molding efficiency is improved; the interface performance of the lining layer is ensured to meet the requirement through raw material control and process control.

The invention discloses a vitamin D3 clathrate compound and a preparation method thereof, and further discloses a calcium carbonate D3 tablet containing the vitamin D3 clathrate compound and a preparation method of the calcium carbonate D3 tablet. The vitamin D3 inclusion compound disclosed by the invention comprises the following components in percentage by mass: 0.05-0.75% of vitamin D3; 80.00 to 99.5 percent of hydroxypropyl-beta-cyclodextrin, and the balance of water; 1.00% to 10.00% of an antioxidant; 0.00 to 5.00% of an anti-sticking agent; wherein the antioxidant is butylated hydroxytoluene (BHT), vitamin E and sodium ascorbate. The invention also provides a preparation method of the vitamin D3 clathrate compound. The preparation method comprises the following steps: dissolving the vitamin D3 and the antioxidant in ethanol; the preparation method comprises the following steps: dissolving hydroxypropyl-beta-cyclodextrin in purified water, and then adding an anti-sticking agent; mixing the two solutions; and drying by using a spray dryer to prepare the vitamin D3 inclusion compound. The vitamin D3 inclusion compound prepared by the invention is high in inclusion rate and yield and can be stably stored for a long time, and a preparation (such as a calcium carbonate D3 tablet) prepared from the inclusion compound meets medicinal requirements, and is good in long-term stability, high in uniformity, simple to prepare and relatively low in cost.

The utility model discloses a part storage rack for electromechanical equipment maintenance, which comprises a rack, a storage device, a sealing device and a driving device are arranged on the rack, the storage device comprises a plurality of laminates, a plurality of first clapboards, a plurality of second clapboards and a plurality of storage boxes, mounting grooves are formed in the lower surfaces of the laminates, and the sealing device is arranged in the mounting grooves. The storage box is arranged in the storage box, parts needed during maintenance of electromechanical equipment can be conveniently stored, the cover plate is arranged above the storage box, the storage box is shielded and closed through the cover plate, the storage box is convenient to use, the storage box is convenient to use, and the storage box is convenient to use. And moisture and oxygen in the air are prevented from entering the storage box, and the storage time of the parts can be prolonged.

The invention discloses a large-area continuous MOF membrane and a preparation method and application thereof.The preparation method comprises the following steps that S1, zirconium tetrachloride and 1, 3, 5-tris (4-carboxyphenyl) benzene are dissolved in N, N-dimethylformamide, then formic acid and water are added, the obtained mixed solution is sealed and then placed in a drying oven for heat preservation, then a sulfonating reagent is added, standing is conducted after backflow is conducted for a period of time, and a sulfonating agent is obtained; centrifugally washing with ultrapure water to obtain a uniform dispersion liquid; s2, a substrate is washed in ethyl alcohol and deionized water for standby application; s3, fixing a substrate on a blade coater, blade-coating and tiling the prepared dispersion liquid on the surface of the substrate, and drying to obtain an MOF film; and S4, transferring the MOF film into a vacuum oven to further stabilize the structure. The two-dimensional MOF nanosheet can be conveniently and rapidly prepared by using a solvothermal method, a large-area continuous MOF membrane can be rapidly prepared by self-assembly through a blade coating method, and excellent lithium ion selectivity and permeability are shown under dual regulation and control of a size effect and an affinity effect of a sulfonic acid group.

The invention relates to a kit and a method for simultaneously detecting IL-6, IL-21 and T cell CD4 surface molecules in lymphatic tissue, and belongs to the field of biomedicine. The kit comprises a quantum dot marked with an IL-6 antibody, a quantum dot marked with an IL-21 antibody and a quantum dot marked with a CD4 antibody. The antibodies marked by the quantum dots are specifically combined with antigens in lymphatic tissues respectively; the CD4T cells have the capacity of secreting IL-6 and IL-21, and the mutual relation between the CD4T cells and IL-6 and IL-21 reflects the tissue immunocompetence. The invention provides a kit for simultaneously detecting IL-6, IL-21 and T cell surface molecules in lymphatic tissues, which positions the spatial relationship between two cell factors and T cells, calculates and analyzes corresponding fluorescence intensity and evaluates immune conditions. The kit has the advantages of high fluorescence intensity, accurate detection result, wide spectrum selection, wide applicability, stable fluorescence structure, long preservation time, high sensitivity, good specificity and the like.

The invention discloses a three-layer sodium-ion battery diaphragm and a preparation method thereof, and belongs to the technical field of battery diaphragms.The diaphragm is of a three-layer A / B / A structure, the A layer is made of sodium-based montmorillonite modified cellulose-based diaphragm, montmorillonite has a high specific surface area and a pore structure, battery permeability and ion transmission efficiency are improved, and energy density and cycling stability are improved. The montmorillonite is subjected to sodium modification, and the sodium montmorillonite is superior to common montmorillonite and is high in dispersity, thermal stability and cation exchange capacity. According to the modified montmorillonite cellulose diaphragm, montmorillonite is hydrated to form a sheet structure to adsorb metal particles with positive charges, and montmorillonite-cellulose combination of the diaphragm is enhanced by combining with fibers with negative charges. The wettability and the liquid absorption rate are improved by the cellulose-based diaphragm, the degree of freedom of sodium ions is enhanced by the sodium montmorillonite, the ion migration speed is increased, and the battery performance is improved. And the layer B adopts a polyolefin diaphragm, so that the temperature requirements under different conditions are met, and the self-turn-off performance is provided.

The invention belongs to the technical field of restoration and protection of paper cultural relics, and discloses a paper deacidification reinforcement microcapsule and a preparation method and application thereof.The preparation method comprises the steps that 1, a chitosan quaternary ammonium salt solution with the mass concentration being 0.2%-5% and a carboxymethylcellulose solution with the mass concentration being 0.2%-4% are stirred for 1-3 hours at the room temperature, and a chitosan quaternary ammonium salt solution is obtained; a chitosan quaternary ammonium salt-carboxymethyl cellulose solution is obtained; (2) dispersing 0.2-0.8 g of nano calcium carbonate in a 95% ethanol solution, and carrying out ultrasonic cavitation to obtain a calcium carbonate-ethanol suspension; and (3) adding the calcium carbonate-ethanol suspension into the chitosan quaternary ammonium salt-carboxymethyl cellulose solution, and carrying out high-speed shearing emulsification to obtain the deacidified and reinforced microcapsule. The deacidification reinforcing microcapsule is simple and convenient to prepare and use, has a good deacidification reinforcing effect, enables paper to be alkaline and anti-aging after being treated, and can effectively improve the durability and prolong the storage life of the paper.

The invention discloses a vertical hotpot condiment packaging machine, and relates to the field of hotpot condiment sealed packaging, the vertical hotpot condiment packaging machine comprises a packaging machine box frame, the packaging machine box frame is provided and connected with a falling channel for hotpot condiments to fall and pass through; a movable limiting mechanism used for limiting the packaging bags is arranged on the upper portion of the falling channel, and the movable limiting mechanism is installed and connected to the packaging machine box frame. A conveying mechanism used for moving and conveying the packaging bags is arranged below the movable limiting mechanism, and the conveying mechanism is installed and connected to the packaging machine box frame. The packaging machine box frame is further provided and connected with a winding and unwinding mechanism used for winding and unwinding the conveyed packaging bags. The packaging machine is used for packaging hotpot condiments, and in the packaging implementation process, the sealing position of a packaging bag can be finely adjusted, so that the sealing effect of the formed hotpot condiment packaging bag is guaranteed, the fresh-keeping effect of the sealed hotpot condiments is guaranteed, and the storage time is prolonged.

The invention relates to the technical field of pesticide packaging devices, in particular to a sealed packaging device for pesticides, which comprises a barrel body, a liquid pumping barrel is arranged at the upper end of the inner side of the barrel body, a piston plate is slidably connected to the inner side of the liquid pumping barrel, and a liquid outlet pipe extending to the outside of the barrel body is fixed to the upper side of the piston plate. A pipe opening blocking mechanism is arranged between the liquid outlet pipe and the liquid pumping barrel, and two pressure balancing mechanisms used for balancing the pressure of the inner side of the barrel body are arranged in the barrel body. Through the pipe orifice plugging mechanism, the liquid pumping cylinder and the barrel body are communicated with the outside only when the pesticide needs to be pumped, and when the pesticide does not need to be pumped, the liquid outlet pipe moves upwards to be located at the highest point, and the flow channel is not communicated with the liquid outlet pipe, so that the liquid pumping cylinder and the interior of the barrel body are always isolated from the outside; therefore, external air can be well prevented from permeating into the inner side of the barrel body during long-time storage, and the storage time of the insecticide in the barrel body is greatly prolonged.

The embodiment of the invention discloses a rice seed coating agent based on halloysite nanotubes as well as a preparation method and application thereof, relates to the technical field of seed coating agents, and aims to solve the technical problem that an existing seed coating agent is difficult to meet application requirements. The rice seed coating agent based on the halloysite nanotubes comprises the following components in parts by weight: 5-20 parts of halloysite nanotubes, 5-20 parts of urea, 1-5 parts of an adhesive, 1-2 parts of calcium chloride, 1-2 parts of an insecticide and 2-3 parts of a plant growth regulator. The halloysite seed coating agent provided by the invention is simple in preparation process, and a fertilizer or a pesticide is loaded by utilizing a hollow tubular structure and an interlayer pore structure of the halloysite nanotube. Through combination of multiple functional components, the germination rate of rice seeds can be increased, growth and development of seedlings are promoted, the yield increasing effect is achieved, and the development requirement of green agriculture is met.

The invention relates to the technical field of packaging and sealing equipment, in particular to automatic packaging and sealing integrated equipment for prefabricated vegetables, a sealing part comprises a slitting part and a sealing group, the sealing group seals a packaging bag filled with the prefabricated vegetables, and the slitting part cuts the part, sealed by the sealing group, of the packaging bag along the middle part, so that the packaging bag filled with the prefabricated vegetables falls off from a bag placing part; meanwhile, the bottom of the packaging bag discharged from the bag placing part is also sealed, and the prefabricated dishes can be continuously packaged; air in the packaging bag is pumped out by the vacuum pump, so that the prefabricated vegetables are in a vacuum environment, the preservation time is prolonged, the packaging bag is cut off while the top of the packaging bag is sealed, and due to the fact that the slitting part is located in the middle of the sealing piece, the packaging bag containing the prefabricated vegetables falls down from the discharging hole, the bottom of the packaging bag outside the discharging pipe is also sealed, and the prefabricated vegetables can continue to be contained; according to the equipment, the procedures of bagging, vacuumizing, sealing, slitting and the like are synchronously completed, the equipment size is greatly reduced, the occupied area is reduced, and meanwhile the packaging efficiency is improved.

The invention relates to the technical field of otolith sample preparation, in particular to a freshwater fish otolith sample preparation method which comprises the following steps: 1, sampling otolith; 2, otolith cleaning; 3, weighing the otolith; 4, fixing the otolith; 5, vacuumizing and hardening; 6, cutting the otolith; 7, fixing and cutting for the second time; 8, otolith polishing; 9, polishing the otolith; 10, otolith dyeing. According to the method, the freshwater fish otolith sample can be well prepared.

The utility model relates to the technical field of preservation devices, in particular to a preservation device for microorganism sampling. The technical problems that according to an existing preservation device, due to the fact that preservation conditions and types of different microorganisms are different, mutual isolation between samples stored in glass bottles is poor, cross contamination is likely to happen when bottle caps are opened and closed for storage, meanwhile, air and other pollutants are likely to enter the bottles when the bottle caps are frequently opened for storing the samples, and the storage time is shortened are solved. The sample is polluted, and the preservation quality of the sample is influenced. According to the technical scheme, the preservation device for microorganism sampling comprises a storage tank, a sealing assembly, a storage assembly and a control assembly; the sealing cover is combined with the sealing strip to be buckled and sealed with the storage tank, so that air and external pollutants are effectively prevented from entering the storage tank, microorganism samples in the storage tank are protected from being influenced by external factors, meanwhile, the situation that the samples in the storage tank are leaked or volatilized to cause deterioration of the samples is avoided, and the storage stability of the microorganism samples is improved.

The invention provides a device capable of collecting and detecting a liquid sample in a time sequence, which comprises a noninvasive liquid sample collecting and sensing detection module, the non-invasive liquid sample collection and sensing detection module comprises a liquid sample flow channel in a Tesla valve form, a liquid sample inlet communicated with an inlet of a reverse channel of the liquid sample flow channel, and a liquid sample outlet communicated with an outlet of the reverse channel of the liquid sample flow channel; the liquid storage cavities are respectively communicated with each curve section of the liquid sample flow channel in the Tesla valve form, and electrodes of the electrochemical sensor are arranged close to the bottom ends of the liquid storage cavities. According to the device capable of collecting and detecting the liquid samples in the time sequence, the liquid storage cavities connected to the Tesla valve in series can effectively prevent liquid from flowing reversely through the design of the structure and the length, sweat detection of different time sequences can be achieved through the characteristic that the reverse flowing speed of the Tesla valve is low, and data changes of sweat are analyzed.

The invention provides a polyimide film and a preparation method thereof, and relates to the technical field of polyimide film preparation. The preparation method of the polyimide film comprises the following steps: adding aromatic diamine and aromatic dianhydride into a polar solvent, and reacting to obtain polyamide acid resin; adding a dispersing agent and carbon black into a polar solvent to obtain slurry; adding the slurry into polyamic acid resin, and then adding aromatic dianhydride to obtain a polyamic acid resin solution B; adding aromatic diamine into the polyamic acid resin solution B to obtain a polyamic acid resin solution C, adding aromatic dianhydride to obtain a polyamic acid resin solution D, and adding an end-capping reagent to obtain a modified polyamic acid resin solution E; performing defoaming, coating and solvent removal treatment on the solution E to obtain a gel film, and performing imidization treatment to obtain a polyimide film; the film prepared by the invention has low water absorption and excellent insulating property.

The invention relates to the field of aromatherapy, in particular to dried flower color locking aromatherapy and a preparation method thereof. The dried flower color locking aromatherapy comprises the following components in parts by mass: a transparent glass bottle, liquid aromatherapy and dried flowers, the liquid aromatherapy is arranged in the transparent glass bottle, and the dried flowers are soaked in the liquid aromatherapy. The liquid aromatherapy product is prepared from the following components in parts by weight: 50 to 65 parts of dipropylene glycol monomethyl ether, 5 to 8 parts of benzalkonium chloride, 10 to 12 parts of deionized water and 12 to 18 parts of color locking composition, wherein the color locking composition is ethylene glycol stearate, sodium carboxymethyl cellulose and essence. According to the dried flower color locking aromatherapy, the problems of fading and corrosion of dried flowers are solved, the original color and luster of the dried flowers are kept, fading and corrosion of the dried flowers are avoided for a long time, fragrance is kept, and the dried flower color locking aromatherapy has ornamental value and decorative value.

The invention provides a TPE blood bag membrane material and a preparation method thereof, and solves the technical problems that an existing PVC blood bag membrane material is not environmentally friendly, not resistant to radiation and sterilization, poor in air permeability and the like. The TPE blood bag membrane material is prepared from the following raw materials in percentage by mass: 20 to 50 percent of SEBS, 5 to 20 percent of plasticizer, 30 to 60 percent of POE and 5 to 20 percent of EVA, the preparation method of the TPE blood bag membrane material comprises the following steps: S1, weighing the raw material components in percentage by weight; s2, fully and uniformly mixing the raw material components weighed in the step S1 to obtain a mixture; s3, carrying out melt extrusion and granulation on the mixture weighed in the step S2 through a twin-screw extruder; the method can be widely applied to the technical fields of polymer materials and medical application.