131results about How to "Simple components" patented technology

The invention relates to the technical field of denitration, and discloses a cerium-based catalyst, a preparation method thereof and application of the cerium-based catalyst in catalytic oxidation of nitric oxide. The cerium-based catalyst contains CeO2 and a transition metal oxide, and the transition metal oxide is selected from at least one of an oxide of Mn, an oxide of Co, an oxide of Ni and an oxide of Cu; on the basis of the total weight of the cerium-based catalyst, the mass content of the transition metal oxide is 0.5-20%. The cerium-based catalyst provided by the invention is prepared by taking rare earth oxide CeO2 as a unique or main catalyst carrier and adding a small amount of specific transition metal oxide. Compared with a traditional catalyst, the cerium-based catalyst has the advantages that the catalytic activity is obviously improved, and high-temperature pretreatment hardly affects the performance of the catalyst and even has a positive effect.

The invention relates to the field of biological fermentation, in particular to a method for fermenting cacumen biotae with compound bacteria and application of the cacumen biotae, and the compound bacteria comprise lactococcus lactis and pichia pastoris. The method comprises the following steps: (1) pretreating cacumen biotae; (2) performing enzyme treatment on the cacumen biotae; (3) fermenting the cacumen biotae; and (4) treating fermentation liquor. The invention has the following beneficial effects: (1) enzymolysis parameters are optimized, fermentation parameters are optimized, a fermentation liquor extraction method is optimized, and a better fermentation method is obtained; (2) the Chinese arborvitae twigs are fermented, so that compared with fermentation of various traditional Chinese medicine raw materials in the prior art, the components are simplified, and the method is more convenient; and (3) a mouse experiment proves that more flavones and a better anti-hair loss effect can be obtained by using the optimized fermentation method, and the application of the cacumen biotae is more facilitated.

The utility model discloses a tumbling cutter for rolling finish machining of a metal workpiece, which relates to the technical field of rolling machining cutters, solves the technical problems of lower surface roughness grade, complex structure and smaller machining range in the prior art, comprises a cutter handle, and is characterized in that a pin shaft is fixedly mounted on the cutter handle; a deep groove ball bearing is installed on the pin shaft, a steel ball frame is fixedly installed at the front end of the cutter handle, a steel ball hole is formed in the front end of the steel ball frame, and a hard alloy ball is movably installed in the steel ball hole. Components are few, the structure is simple, manufacturing and maintenance are easy, and production efficiency is improved; the contact surface of the tumbling cutter is small, large pressure can be obtained, equipment load is reduced, abrasion is relieved, and the service life of equipment is prolonged; the deep groove ball bearing serving as a supporting element is small in friction coefficient and beneficial to maintaining the rolling state; and the production flexibility is improved due to the workpieces which can be subjected to roll finishing.

The invention discloses an in-situ self-condensing hydrogel based on hydrothermal carbonization synthesis and a preparation method thereof, belongs to a water retention material in an ecological restoration technology and an in-situ self-condensing technology, and aims to solve the technical problems of high energy consumption and serious environmental pollution during hydrogel preparation in the prior art. The preparation method comprises the following steps: preparing modified hydrothermal carbon filtrate, N, N '-methylene bisacrylamide, acrylamide and ammonium persulfate; the modified hydrothermal carbon filtrate comprises plant powder, sodium hydroxide and urea; the preparation method comprises the following steps: weighing sodium hydroxide and urea, and dissolving to obtain a mixed solution; weighing plant powder, pouring the plant powder into the mixed solution, uniformly mixing, reacting and carrying out suction filtration to obtain modified hydrothermal carbon filtrate, so as to obtain a mixture 1; uniformly mixing N, N '-methylene bisacrylamide, acrylamide and the mixture 1, adding ammonium persulfate, uniformly mixing to obtain a mixture 2, reacting the mixture 2 at normal temperature, washing, and drying to obtain the in-situ self-condensing hydrogel.

The invention discloses a method for effectively relieving soybean antigen protein Glycinin in fish feed and application of the method. The invention discloses application of N-acetylcysteine as a functional feed additive capable of relieving carp enteritis induced by soybean antigen protein Glycinin. The feed disclosed by the invention comprises a soybean antigen protein Glycinin and N-acetylcysteine (NAC). According to the present invention, 1.5-6.0 g / kg of NAC is added to a feed containing 80 g / kg of Glycinin, such that the fish growth, the feed utilization rate, the digestion function, the protein metabolism function, the immune function, the oxidation resistance and the intestinal morphology can be significantly improved, and the soybean antigen protein Glycinin-induced growth inhibition and the intestinal injury can be effectively relieved; the functional fish feed additive provided by the invention is relatively low in cost and easy to popularize, and is beneficial to development of novel green antibiotic-replacing additives, improvement of the utilization rate of soybean protein sources, reduction of feed cost and promotion of healthy culture of fishes.

The invention discloses a microneedle high-speed implanter, and relates to the technical field of medical instruments, and the microneedle high-speed implanter comprises a cylindrical cavity, a sealing cover, sealing rubber, a microneedle storage sheet and a microneedle. The microneedle storage piece is used for storing microneedles, a limiting ring is arranged in the microneedle storage piece and used for fixing the microneedles, the microneedles are nail-shaped, and when the microneedle storage piece is used, the microneedle storage piece containing the microneedles is embedded into the columnar cavity, and the sealing cover is fixed to the columnar cavity through threads and sealed through the sealing rubber. Compressed gas enters the microneedle high-speed implanter through the rapid gas pipe connector on the sealing cover, pushes the microneedle to be separated from the microneedle storage piece, continuously accelerates in the acceleration trajectory of the columnar cavity and finally flies out at a certain speed. And after the flying-out microneedle is in contact with the skin, the conical needle tip punctures into the skin, and the base is blocked to stay outside the skin, so that a specific puncture depth is realized. The invention aims to realize efficient implantation of the microneedle by utilizing the hardening phenomenon of the skin at a high strain rate.

The invention discloses a display method of a high-chromium-nickel multi-component alloying austenitic heat-resistant steel grain boundary, and belongs to the technical field of metallographic sample preparation. The method comprises the following steps: grinding and polishing a to-be-corroded high-chromium-nickel multi-element alloying austenitic heat-resistant steel sample; enabling the ground and polished surface to be corroded of the sample to be in full contact with a corrosive agent for 2.5-4 minutes so as to corrode the sample; wherein the corrosive agent is a normal-temperature aqueous solution of FeCl3 and HCl, the mass concentration of FeCl3 in the corrosive agent solution is 4.8-5.2%, and the volume concentration of HCl is 20%; and washing the corroded sample with clear water, then washing with absolute ethyl alcohol, and drying. According to the method, the grain boundary corrosion of the high-chromium-nickel multi-element alloying heat-resistant steel for the ultra-supercritical unit can be realized at normal temperature, electrolytic corrosion is not needed, the operation is relatively simple, and the components of the corrosive agent are also relatively simple.

The utility model provides a wafer grinding set, which comprises a working disc, a wafer bearing surface, a rotating shaft center point formed by the rotating axis of the working disc on the wafer bearing surface, a fixed supporting point arranged on the wafer bearing surface, and a center line passing through the fixed supporting point and the rotating shaft center point; the first displacement meter is provided with a first measuring point, and the first measuring point is located on the working disc and passes through the center line; and the second displacement meter is provided with a second measuring point, and the second measuring point is positioned on the working disc and does not pass through the center line. The utility model further discloses a wafer grinding device with the wafer grinding set.

The invention provides an indoor unit and an air conditioner, and the indoor unit comprises a middle frame shell, a middle frame shell, an air guide plate, a heat exchanger and a heat exchanger, one end of the wind shielding curtain is connected with the wind deflector, and the other end of the wind shielding curtain is mounted on the opening side, corresponding to the wind deflector, of the air outlet; when the air outlet is opened by the air deflector, the air blocking curtain and the air deflector form an air channel with a lateral air outlet arranged in the transverse direction, so that airflow output by the air outlet is guided out through the lateral air outlet. The technical problem that the use efficiency of the indoor unit is reduced due to the fact that a traditional air blocking curtain and a traditional air guide plate are independent in function in a middle frame shell and poor in cooperation and cooperation between the air blocking curtain and the air guide plate is solved.

The present application discloses a use of a self-assembled hydrogel in plugging allergic dentinal tubules, belonging to the technical field of dental biomaterials. The present application provides a use of a self-assembled hydrogel for preparing an allergic dentinal tubule plugging agent, wherein the self-assembled hydrogel is formed by contacting a 1‑30% w / w macromolecular solution with a 1‑30% w / w polyphenol solution; the present application also provides a desensitization therapeutic agent for dentin hypersensitivity containing the self-assembled hydrogel. After the self-assembled hydrogel provided in the present application is used to prepare an allergic dentinal tubule plugging agent, the macromolecular solution and the polyphenol solution can respectively penetrate into the deep layer of the allergic dentinal tubules and self-assemble inside the dentinal tubules to form a dense cross-linked macromolecular hydrogel, thereby effectively avoiding the problem that the cross-linked macromolecular gel solution is difficult to penetrate into the deep layer of the allergic dentinal tubules, and achieving deep plugging of the allergic dentinal tubules.

The present invention discloses a multi-needle bar driven embroidery machine head and an embroidery machine, belonging to the technical field of embroidery machines. The embroidery machine head comprises a housing, a needle bar driving shaft, a guide rod, a needle bar driver, a needle bar cam and a connecting rod structure. The guide rod and the needle bar driver are both provided with 2N numbers at intervals in the horizontal direction, N is a positive integer and a multiple of 2, and the connecting rod structure is provided with N sets in parallel in the horizontal direction, and each set of connecting rod structures is used to drive two corresponding needle bar drivers. Each set of connecting rod structures drives two needle bar drivers, and the connecting rod structures on the same head are arranged side by side in the horizontal direction. The corresponding relationship between the connecting rod structure and the needle bar driver is reasonably set, and the number of connecting rod structures is appropriately controlled while satisfying the driving requirements of the multi-needle bar drivers, reducing the installation space required for the connecting rod structure, which is conducive to reasonably simplifying the internal structure of the head, reserving sufficient installation space for other components of the head, so that the head can meet the structural requirements of the multi-needle bar drive.

The multifunctional cervical and lumbar vertebra traction bed comprises an upper bed outer frame, side sliding rails are arranged at the front end and the rear end of one side of the upper bed outer frame correspondingly, a lower bed outer frame is movably connected to one sides of the two side sliding rails, and S-shaped frames are fixedly connected to the front side and the rear side of the upper bed outer frame correspondingly; the lower end of one side of the upper bed outer frame is fixedly connected with a U-shaped supporting frame, a T-shaped supporting frame is fixedly connected between end feet of one sides of the two S-shaped frames, a guide rail is fixedly connected between the upper end of the T-shaped supporting frame and the lower end of the U-shaped supporting frame, the surface of the guide rail is sleeved with two sliding frames, the upper ends of the two sliding frames are fixedly connected with a movable beam (A), and the lower ends of the two sliding frames are fixedly connected with a movable beam (B). And one end of the movable beam (A) is connected with a stretching driving mechanism. Compared with the prior art, the S-shaped frame has the advantages that the handrail and the support are integrated in the manufacturing process, so that an existing handrail structure is replaced, components are further simplified, and the mounting efficiency is improved.

The invention belongs to the technical field of drilling and completion of heavy oil wells, and particularly relates to an anti-condensation pipe inhibitor as well as a preparation method, a use method and application thereof. The anti-condensation pipe inhibitor provided by the invention comprises the following components in percentage by weight: 80%-100% of a penetrant and 0-20% of a solubilizer. The anti-condensation pipe inhibitor disclosed by the invention has the advantages of simple components, convenience in preparation, rapidness, high efficiency, low cost, strong pertinence, no influence on the performance of drilling fluid and the like.

The invention discloses a method for preparing a star-shaped block copolymer based on a light-operated in-situ bromine-iodine conversion reversible-inactivation free radical polymerization method, which comprises the following steps: mixing and dissolving MMA (methyl methacrylate), an alkyl bromide initiator, iodide and an amine catalyst, and carrying out BIT-RDRP reaction under the irradiation of blue light to obtain a star-shaped homopolymer; and mixing and dissolving PEGMA300, iodide and an amine catalyst, mixing with the star-shaped homopolymer, and carrying out a BIT-RDRP reaction under the irradiation of blue light to obtain the amphiphilic star-shaped block copolymer. According to the invention, a BIT-RDRP reaction is adopted, and the BIT-RDRP reaction is introduced into a continuous flow microtube reactor to prepare an amphiphilic star-shaped block copolymer with a controllable block ratio; the method is mild in condition, simple in component, high in efficiency and capable of realizing continuous preparation, and a simple and efficient method is provided for controllable large-scale preparation of the star-shaped block copolymer.

This invention belongs to the field of metal rust prevention technology, specifically relating to an environmentally friendly water-based rust-preventive composition, its preparation method, and its application. The composition comprises, by weight, 3-8 parts of a first triazine compound, 1-5 parts of a second triazine compound, 10-20 parts of 2-amino-2-methyl-1,3-propanediol, 2-5 parts of dipropylene glycol monomethyl ether, and 65-85 parts of water. The first triazine compound is a triazine compound having substituents containing hydrophobic segments and at least two aminocarboxylic acid substituents, and the second triazine compound is a triazine compound having thiol substituents. This invention forms a dual-anchored protective film on the metal surface through the two triazine compounds, exhibiting excellent salt spray resistance, damp heat resistance, and film density. It achieves a salt spray test duration of 72 hours, a damp heat test duration of 960 hours, and an adhesion rating of 0. Furthermore, it is free of nitrites, phosphates, and heavy metals. The preparation method is simple, suitable for industrial production, and can be widely applied to metal rust prevention in machinery manufacturing, automotive parts, and other fields.

The invention discloses a 5-(4-benzocyclobutenyl)-1, 3-phenylenediamine compound, polyimide, a polymer film and a preparation method of the 5-(4-benzocyclobutenyl)-1, 3-phenylenediamine compound. A modified monomer with two active amino groups and a benzocyclobutene group capable of being directly heated and cross-linked is used as a diamine monomer to perform polymerization reaction, so that the benzocyclobutene group is introduced into a polymer molecule side chain, a four-membered ring of benzocyclobutene is subjected to ring opening cross-linking at high temperature to form an eight-membered ring structure, and the molecular weight of the polymer is reduced; according to the present invention, the low-molecular-weight by-product is not released during the curing, the catalyst or the initiator is not required to be added during the curing process, and other heteroatoms are not introduced, such that the prepared polymer film has characteristics of excellent heat resistance and excellent dielectric property, and has wide application prospects in the field of the dissolvable, easily-processed and low-water-absorption-rate target resin.

The application provides a boar semen cryopreservation agent and an application method; the boar semen cryopreservation agent comprises alpha-amylase, and the content of the alpha-amylase is 10-1000 mu g / L. The application method of the cryopreservation agent is as follows: centrifuging the boar semen after collection and pretreatment, removing supernatant after centrifugation; adding a refrigerant, re-suspending the sperm, and then placing the sperm in a 4 DEG C refrigerator and standing for 3-4 hours; adding a freezing liquid and fully mixing; filling the semen into a thin tube at 4 DEG C, uniformly laying the thin tubes in a freezing rack, and then precooling on a liquid nitrogen surface and then placing in liquid nitrogen for freezing. The application has the advantages that: the overall components of the cryopreservation agent are simple, the cost is low, and the overall cost performance is high; due to the addition of alpha-amylase in the cryopreservation agent, the storage quality of the boar frozen semen can be significantly improved; and the activity, acrosome integrity, DNA integrity, mitochondrial activity and other physical and chemical properties of the boar frozen semen are effectively improved.

The purpose of this disclosure is to provide a component with excellent chemical resistance, a method for manufacturing the same, and an apparatus for semiconductor manufacturing. This disclosure pertains to a component formed by laminating at least a portion of the surface of a material (a) with a barrier material having aromatic rings, wherein the component is at least one selected from the group consisting of components for building materials, components for mobile vehicles, components for aerospace applications, components for semiconductors, and components for information and communication.

The present invention discloses an embroidery machine, belonging to the technical field of embroidery equipment, comprising an upper shaft and a main drive motor, and also comprising a plurality of head modules, wherein the main shaft is arranged outside each head module, and each head module comprises at least one head, and the head comprises a housing, a needle bar drive shaft, a guide rod, a needle bar driver, a needle bar cam, a connecting rod structure, a presser foot structure, a presser foot drive wheel and a presser foot transmission mechanism, wherein the connecting rod structure is arranged between the needle bar cam and the needle bar driver and is used to drive the needle bar driver to move up and down, and the presser foot transmission mechanism is arranged between the presser foot drive wheel and the presser foot mechanism and is used to drive the presser foot mechanism to move up and down. Since the main shaft is arranged outside the head module, the strength of the main shaft can be increased by increasing the outer diameter of the main shaft, so as to better meet the structural requirements of the embroidery machine. When the main shaft needs to be replaced, only the relevant components of the sub-drive transmission mechanism need to be disassembled from the main shaft, and there is no need to disassemble the components on the head module.

The invention relates to the technical field of building materials, and discloses thermal insulation mortar as well as a preparation method and application thereof. The thermal insulation mortar comprises a dry material and a liquid material, the dry material comprises the following components: cement clinker, river sand, filler and redispersible latex powder; the liquid material comprises the following components: water and a heat-insulating emulsion; the mass ratio of the dry material to the liquid material is (2.0-2.6): 1. The thermal insulation mortar provided by the invention is simple in component, the thermal insulation emulsion is used as a functional thermal insulation raw material, the mortar can have a good reflective insulation effect, the mechanical properties such as tensile adhesive strength and compressive strength are improved, dry materials and liquid materials are mixed according to a specific proportion, the sand falling phenomenon during construction can be avoided, and the constructability is good.

The invention discloses an in-situ self-condensing hydrogel synthesized based on hydrothermal carbonization and a preparation method thereof, which belongs to water-retaining materials and in-situ self-condensing technologies in ecological restoration technology, and aims to solve the technical problems of large energy consumption and large environmental pollution in the preparation of hydrogels in the prior art. The invention comprises modified hydrothermal carbon filtrate, N, N'-methylenebisacrylamide, acrylamide, and ammonium persulfate; the modified hydrothermal carbon filtrate comprises plant powder, sodium hydroxide and urea; during preparation, sodium hydroxide and urea are first weighed and dissolved to obtain a mixed solution; plant powder is then weighed and poured into the mixed solution, and the modified hydrothermal carbon filtrate is obtained after mixing, reacting, and filtering to obtain a mixture 1; N, N'-methylenebisacrylamide, acrylamide and mixture 1 are uniformly mixed, and ammonium persulfate is added to mix to obtain a mixture 2; mixture 2 is reacted, washed, and dried at room temperature to obtain an in-situ self-condensing hydrogel.

The utility model provides a pier-side bracket for pushing a large-tonnage steel beam, which is characterized by comprising upright posts arranged on two sides of a pier, an upper backing plate and a lower backing plate respectively arranged at the upper end and the lower end of each upright post, and a top pad arranged on the upper backing plate, and is characterized in that anchoring horizontal support groups are arranged on the upright posts from top to bottom at intervals on the side of the pier; and one end of each layer of anchoring horizontal support group is fixedly connected with the pier, and the other end is fixedly connected with the upright post to form a closed-loop horizontal anchoring support structure. Compared with a non-pier-side support, the support is provided with a pier horizontal support, replacement filling hardening or piling curing is not needed, the material strength of the support can be reduced, the material amount is reduced, the construction cost of a temporary support is reduced, and field installation is convenient; the provided closed-loop anchoring horizontal supporting set is used for coping with horizontal thrust generated by pushing of the steel beam, transverse impact force generated in the pushing process of the steel beam is resisted through a prestress opposite-pulling structure, the bearing capacity of the pushing pier-side support is improved, stable installation of the pier-side support is facilitated, and the pushing requirement of the large-tonnage steel beam is met.

The application discloses a cement aerogel material with micro-expansion and shrinkage inhibition and a preparation method thereof. The cement aerogel material is prepared by mixing, foaming, pore forming and drying of a first component, cement and a second component. The first component comprises a hydrogel polymer, an expansion component, water and a dispersing agent. The second component comprises a foaming agent. The weight ratio of the hydrogel polymer, the expansion component, water and the cement is 0.08-0.3:0.04-0.3:8-15:1. By introducing the expansion component with a proper proportion, the expansion component expands, the intermediate-state skeleton strength is improved, and the shrinkage is resisted. The expansion volume is not less than the shrinkage volume in the drying process, the drying shrinkage is effectively offset, the overall structure integrity is maintained, and finally an additional active reinforcement effect is generated.

The utility model relates to the technical field of smoke-blocking vertical walls, in particular to an automatic smoke-blocking vertical wall which comprises a smoke-blocking vertical wall body, a traction mechanism, a triggering mechanism and a sensing device. The ceiling screen main body is arranged below a bare ceiling or on a decorative ceiling; the traction mechanism is connected with the smoke screen main body and is used for adjusting the lifting of the smoke screen main body; the traction mechanism is connected with the triggering mechanism; the sensing device is detachably connected with the triggering mechanism; when the induction device is triggered, the triggering mechanism can be triggered to drive the traction mechanism to move, and lifting of the ceiling screen body is adjusted. The induction device is a liquid glass bulb or a device containing easily-melted metal. According to the automatic smoke-blocking vertical wall, after the induction device induces high-temperature gas or smoke dust and is triggered, the triggering mechanism drives the traction mechanism to move so as to control and adjust the lifting of the smoke-blocking vertical wall main body, and the induction device does not need to be networked or provide a signal for use, and can automatically react and independently work.

The invention discloses a Frankliniella occidentalis attractant and application thereof, and belongs to the technical field of pest attractants. The effective component of the Frankliniella occidentalis attractant is at least one of n-butyraldehyde and (E, Z)-2, 6-nonadienal, and the concentration of the effective component is 0.001-10 mg / mL. The Frankliniella occidentalis attractant has a good attraction effect on Frankliniella occidentalis adults, after n-butyraldehyde and (E, Z)-2, 6-nonadienal are compounded, the defect that high concentration is used due to the fact that single (E, Z)-2, 6-nonadienal achieves a high attraction effect can be overcome, and the compounded attractant has a remarkable attraction effect at an extremely low dosage. In addition, the attractant is a plant source compound and does not pollute the environment; pests are not easy to generate resistance; the composition is simple, convenient to synthesize, economical, environment-friendly and convenient to popularize and apply.

The invention discloses a photochromic solution, a photochromic cellulose acetate film and a preparation method and application of the photochromic cellulose acetate film and belongs to the technical field of photochromism, and the photochromic solution is prepared from methylene blue and triethanolamine. The obtained photochromic solution has excellent responsiveness under visible light, meanwhile, the raw material cost is low, the preparation process is simple, the color changing effect is obvious, the color fading rate is higher, obvious color changes are shown under light source irradiation, and the photochromic solution has wide application prospects and can be used in the fields of sensors, intelligent materials and the like.

The invention relates to the technical field of traditional Chinese medicine and health food, in particular to a composition for assisting in improving memory, application and a preparation. The composition for assisting in improving the memory comprises the following components in parts by weight: 2-9 parts of ginseng, 2-9 parts of ligusticum wallichii, 3-10 parts of gastrodia elata and 0.2-0.8 part of a ginkgo leaf extract. The preparation method of the composition comprises the following steps: adding water into gastrodia elata for extraction, filtering to obtain medicine residues and an extracting solution, concentrating the extracting solution, adding ethanol for fractional precipitation, and merging precipitates to obtain gastrodia elata polysaccharide; adding the medicine residue, ginseng and ligusticum wallichii into ethanol, extracting, filtering, concentrating under reduced pressure, and drying to obtain extract powder; and finally, mixing the gastrodia elata polysaccharide, the extract powder and the ginkgo leaf extract. Exploration is carried out on extraction methods of all the components, and efficacy experiments prove that the finally prepared composition has a remarkable memory improving effect.

The invention discloses a method for synthesizing tetracyclododecene (TCD) with high selectivity and low byproduct, which comprises the following steps of: pyrolyzing dicyclopentadiene (DCPD) serving as an initial raw material to generate cyclopentadiene (CPD), and reacting with norbornene (NB) in a system to generate TCD. According to the method, the feeding molar ratio of NB to DCPD is controlled to be 1: (0.237-2.138), preferably 3: 1, the reaction is carried out at the temperature of 160-280 DEG C and under the pressure of 3.0-8.0 MPa, CPD auto-agglutination and side reactions of CPD, DCPD, TCD and the like can be effectively inhibited, and the reaction selectivity is remarkably improved. The method is simple in process, the content of by-products in the obtained crude product is low, the components are relatively simple, the solvent and unreacted monomers can be conveniently recovered through rectification, the TCD product with the purity of 95% or above is finally obtained, and the whole process is easy for large-scale production.

The utility model discloses a viscous particle measuring device based on coupling of front light image transmission and backlight imaging. The viscous particle measuring device comprises a front light image transmission system, a backlight imaging system, a light source transmission system and a supporting system, the light source transmission system is connected in series with the front light image transmission system and the backlight imaging system; the backlight imaging system is positioned on the left side of the front light image transmission system; the light source transmission systems are located on the two sides of the front light image transmission system and the backlight imaging system. And the support system is rigidly connected to the light source transmission system, the front light image transmission system and the backlight imaging system. The device is ingenious in structure, simple in assembly and good in integrity; the method is suitable for high-precision measurement of non-viscous particles and viscous particles; the method has strong robustness on irregular size particle distribution in an unstable flow system, can eliminate the particle size spatial-temporal change effect caused by the viscous flocculation effect, and shows low sensitivity to the scattering intensity and the particle size refractive index / transmissivity of a light source at the same time.

The invention relates to the field of biological detection, in particular to a recombinase activity detection method and a kit. According to the method for detecting the strand displacement activity of the recombinase, the strand displacement template is subjected to fluorescence labeling, a quenching group modified DNA strand is displaced by utilizing the strand displacement effect of the recombinase, and the relative activity of the recombinase to be detected is obtained through a linear fitting equation of the fluorescence intensity increasing rate and the activity. The method can be used for detecting strand displacement products through a fluorescence detection means, is non-toxic and harmless, is simple and feasible, and can be used for determining the strand displacement recombination activity of the recombinase within 1 hour. By using the method, quantitative data of strand displacement activity can be obtained, and the strand displacement activity of recombinase can be accurately analyzed.