46results about How to "Good potential" patented technology

The invention relates to the technical field of sandstone type uranium ore geological exploration, and particularly discloses a paleovalley type uranium ore exploration method. The method comprises the steps that 1, field core logging is performed, paleovalley sandstone core features are acquired through geological and geophysical prospecting and hydrological logging, and a drilling comprehensive histogram is drawn; 2, mineral features of the paleovalley sandstone core are acquired through sampling the sandstone core and performing geological and geophysical prospecting sampling analysis; 3, a paleovalley planar map and a paleovalley profile map are drawn, and paleovalley sand body strata are divided according to drilling data and sandstone core logging; and 4, an oxidation region and a restoration region are divided according to the paleovalley sand body strata, an oxidation zone front line of an interface of the oxidation region and the restoration region is determined, a delineated uranium ore body is analyzed through drilling, searching and verifying. According to the exploration method, the ore-forming environment of the paleovalley type uranium ore can be effectively judged, division for the paleovalley sand body is performed, a preferable ore-finding area is delineated, and a technical method and a basis are provided for ore-finding of the paleovalley type uranium ore.

The invention relates to preparation of protamine gold nanoclusters and application in analogue enzyme color comparison and fluorescence detection. The protamine gold nanoclusters not only have activity of horseradish peroxidase and oxidase, but also have fluorescent characteristic. Hereby, a protamine gold nanocluster analogue enzyme visual color comparator and a fluorescence sensor are established respectively and are used for detecting heavy metal ions. The protamine gold nanoclusters are prepared simply and conveniently, are low in cost, and have excellent fluorescence stability and chemical stability, and the shortcomings that fluorescence of traditional dyestuff is short in service life, photobleaching occurs easily and the like can be overcome; a fluorescence method is high in sensitivity and good in stability, and expensive instruments are not required; and analogue enzyme catalytic color comparison is sensitive and environment-friendly, and can be used for field real-time monitoring. The protamine gold nanoclusters are expected to be expanded and applied to detection and analysis of related substances in the fields of environment and biomedicines and disease markers, and have wide application prospect.

The invention particularly relates to a xanthine oxidase inhibitory peptide. The amino acid sequence of the xanthine oxidase inhibitory peptide is Glu-Glu-Ala-Lys (EEAK). The IC50 value of the tetrapeptide EEAK on xanthine oxidase inhibitory activity is 173.00+ / -0.06 [mu]M, the tetrapeptide EEAK has a continuous and stable inhibitory effect on xanthine oxidase, and the tetrapeptide EEAK has the outstanding advantages of safety, no toxic or side effect, easiness in absorption, industrialization and the like. The active tetrapeptide EEAK or the derivative thereof can be used for preparing gout treatment / prevention medicines or used as a functional food additive for long-term treatment and health care of gout patients, and has a wide application prospect and very important significance.

The invention provides a biomedical metastable beta type Zr-Nb alloy ingot casting. The biomedical metastable beta type Zr-Nb alloy ingot casting is composed of components including, by mass percent, 10% to 50% of Nb, 0.05% to 0.15% of O and the balance Zr and inevitable impurities. In addition, the invention further provides a method for preparing the Zr-Nb alloy ingot casting. The method comprises the steps that firstly, raw materials are weighed and mixed to be pressed into a self-consuming electrode block; secondly, combined welding is carried out to obtain a primary self-consuming electrode; thirdly, smelting is carried out to obtain a primary ingot casting; fourthly, combined welding is carried out to obtain a secondary self-consuming electrode; fifthly, smelting is carried out to obtain a secondary ingot casting; sixthly, combined welding is carried out to obtain a three-time self-consuming electrode; seventhly, smelting is carried out to obtain a finished product ingot casting. According to the alloy ingot casting, the content of Zr in the alloy element is higher than the content of Zr-Nb base alloy for traditional nuclear engineering, the chemical component uniformity is good, an alloy bar obtained through machining treatment of the finished product ingot casting has the good comprehensive mechanical property, and the ingot casting has the good application prospect in the surgical implant field of the orthopedics department, the dentistry and the like.

The present invention relates to a Geobacillus caldoxylosilyticus strain producing cyclodextrin glycosyltransferase, wherein the strain is Geobacillus caldoxylosilyticus CHB1, is preserved in China Center for Type Culture Collection on August 28, 2013, and has the preservation number of CCTCC M2013384, and it is proved that the enzyme produced by the Geobacillus caldoxylosilyticus is cyclodextrin glycosyltransferase (short for CGTase) belonging to the alpha-amylase family, and can be adopted to catalyze soluble starch so as to generate alpha-cyclodextrin. According to the present invention, the new strain Geobacillussp CHB1 producing CGTase is provided, the optimum enzyme activity reaction temperature of the enzyme production fermentation broth supernatant of the strain is 65 DEG C, the activity is maintained between 40-85 DEG C, and the CGTase produced by the strain can be used for producing alpha-cyclodextrin, and can further be used for processing processes of starch in the temperature range and the like.

The invention provides an indium zinc sulfide / zinc ferrite composite photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: a) mixing an iron source, a zinc source and polyvinylpyrrolidone in the presence of a first solvent, performing electrostatic spinning, and calcining to obtain ZnFe2O4 nanofibers; and b) mixing a zinc source, an indium source and a sulfur source in the presence of a second solvent, adding the ZnFe2O4 nanofiber obtained in the step a), and carrying out solvothermal reaction, so that the obtained ZnIn2S4 nanosheet is loaded on the ZnFe2O4 nanofiber to obtain the indium zinc sulfide / zinc ferrite composite photocatalyst. Compared with the prior art, the preparation method provided by the invention has the advantages that a two-dimensional ZnIn2S4 nanosheet photocatalyst is loaded on one-dimensional zinc ferrite (ZnFe2O4) nanofibers through a low-temperature solvothermal method, so that the ZnIn2S4 / ZnFe2O4 nano composite material is obtained, and the composite material can be used for carrying out photocatalytic degradation on waste gas so as to effectively treat the waste gas.

The invention relates to antifungal application of an essential oil composition to mildew fungi.The essential oil composition is a composition obtained after reforming and compounding natural plant essential oil. The essential oil composition mainly comprises limonene, 1,8-cineole, p-cymene, terpilenol and the like. Verticillium fusarium, aspergillus flavus, penicillium citrinum, bacillus subtilis, saccharomycetes and lactobacillus paracasei in the mildew fungi are selected, an antifungal activity test on the essential oil composition is conducted, and it is shown through the result that the essential oil composition has a good antifungal effect on the six kinds of fungi within a certain concentration range.When the essential oil compositon shows the obvious inhibition effect on the six kinds of fungi, the concentration of the essential oil composition ranges from 0.075 microliter per milliliter to 0.240 microliter per milliliter, and the concentration of propionic acid ranges from 0.045 microliter per milliliter to 0.263 microliter per milliliter. The effective concentration range of the essential oil composition is in the propionic acid range, and good application potential is achieved for antifungal operation of the mildew fungi.

The invention relates to the technical field of oil field oil production engineering and belongs to a combined type double jet flow nozzle used for an oil-water well oil layer ground control underground level drilling device. The nozzle is designed for solving problems that a prior nozzle can only produce common continuous jet flows and rock crushing efficiency is low. The nozzle is composed of a pressing cap 1, a rotation body 2 and a nozzle base 3, wherein the right end of the pressing cap 1 is threaded to the left end of the nozzle base 3; the rotation body 2 is disposed in the nozzle base 3 and is pressed with the aid of the pressing cap 1. The nozzle is mainly applied to field construction of the oil-water well oil layer ground control underground level drilling device and has advantages of being simple in structure and capable of converting common continuous jet flows into rotation jet flows and thus achieving high rock crushing efficiency and the like.

The invention discloses a halogen-free flame retardant polycarbonate (PC) composite material and a preparation method thereof. The halogen-free flame retardant polycarbonate (PC) composite material is prepared from the following components in percentage by mass: 75%-95% of polycarbonate (PC), 0.05%-0.1% of a halogen-free flame retardant, 5%-15% of organic montmorillonite, 0.1%-1% of anti-dropping agent, 0.1%-1% of a hydrolysis-resistant stabilizer, 0.1%-0.5% of an antioxidant and 0.1%-1% of a lubricant. Compared with the prior art, a sulfonate halogen-free flame retardant and organic montmorillonite adopted by the preparation method have good flame-retardant synergistic effect, so that the prepared polycarbonate (PC) composite material has high flame resistance, is halogen-free, non-toxic, safe, efficient, capable of achieving UL-94V-0 level and preventing melting and dropping and also capable of improving the performances such as impact strength, rigidity, heat resistance and processing performance of the material, and has good potential and application prospect.

The invention relates to a programmable U-segment wireless microphone system. The programmable U-segment wireless microphone system comprises a wireless microphone sender and a wireless microphone receiver, wherein the wireless microphone sender comprises a key, a programmable key module, a first CPU module connected with the programmable key module, a control signal and audio signal coding module and a transmitting module; the wireless microphone receiver comprises a receiving module, an audio signal and control signal decoding module, a second CPU module, an infrared remote control programmable module and / or a serial communication programmable module; and the infrared remote control programmable module and the serial communication programmable module are arranged in parallel, wherein the infrared remote control programmable module and the serial communication programmable module are separately connected with the serial interface of a song choosing machine, and used for identifying and programming the serial interface instruction of the song choosing machine, and storing in the second CPU module. The programmable U-segment wireless microphone system disclosed by the invention has the advantage that: a person using a wireless microphone in the invention can rapidly control all kinds of equipment by utilizing the microphone.

The invention relates to an environmental protection PVC color cake. The environmental protection PVC color cake comprises 38 to 45 parts of PVC paste resin, 33 to 42 parts of PVC resin powder, 28 to35 parts of poly amino resin, 32 to 39 parts of a pigment, 20 to 32 parts of diatomite, 8 to 13 parts of zinc stearate, 12 to 16 parts of stearic acid, 6 to 11 parts of nanometer zinc oxide, 3 to 6 parts of organic tin, 2 to 5 parts of organic antimony, 11 to 15 parts of epoxy soybean oil, 6 to 12 parts of cellulose, 4 to 9 parts of silica, 30 to 45 parts of deionized water, and 16 to 23 parts ofglycerin. Novel materials are added into an obtained base material, and dispersion grinding is carried out so as to obtain the environmental protection PVC color cake. The environmental protection PVCcolor cake is prepared from the novel environment-friendly materials at a scientific and reasonable ratio, the common environment-friendly safe raw materials are adopted in the formula, so that the obtained environmental protection PVC color cake is high in safety, uniform in coloring, low in manufacturing cost, and excellent in application potential, is convenient to use, and is economical.

The invention relates to a point cloud segmentation method for a power corridor scene, which comprises the following steps of: training and adjusting a convolutional neural network with a structure with six stages, and transmitting disordered point clouds as input to the convolutional neural network which is trained and adjusted for segmentation. The method has high change adaptability to angle and shape changes of objects in an electric power corridor scene; moreover, the convolutional neural network does not add artificial preset characteristics, and the object is segmented through a learning method, so that the objective facts are reflected better. The work of using the convolutional neural network method is to design a network architecture, which is time-saving and labor-saving compared with the design of manual features. In addition, compared with a deep learning network using voxels, the used convolutional neural network directly uses point cloud input, and the calculated amountand the intermediate variable storage space are greatly reduced. And finally, as there are few data sets of the electric power scene, the data sets are increased by using a transfer learning method, and the generalization ability of the model is improved.

The invention provides a nucleic acid protein nanocomposite as well as a preparation method and application thereof. Functional proteins and a coupling reagent are coupled with each other and are thenconnected with a nucleic acid chain, a nucleic acid nanostructure is connected with a capture chain, and the nucleic acid chain is connected with the capture chain by means of complementary base pairing; the nucleic acid protein nanocomposite provided by the invention realizes the precise arrangement of the functional proteins on the nucleic acid nanostructure, and solves the problem that proteindrugs can not easily enter cells as biomacromolecules; the nucleic acid protein nanocomposite can rapidly deliver the loaded protein drugs into tumor cells and achieve the cytotoxic effect so as to achieve the aims of killing cancer cells and inhibiting the vitality of the cancer cells. In addition, the preparation method of the nucleic acid protein nanocomposite is simple and easy to implement,and can precisely control the positions of the functional proteins on the nucleic acid nanostructure; furthermore, the nucleic acid protein nanocomposite has a good anti-tumor effect, and is expectedto be applied to the study of the administration of various biological functional macromolecules and the early diagnosis of diseases.

The invention discloses a sprint training machine which comprises a running machine frame. Small carrier rollers are arranged between running frames of the running machine frame, a running belt attached to the small carrier rollers is arranged outside the small carrier rollers, the two ends of the running belt are respectively provided with a fixing roller in belt transmission fit with the running belt, the fixing rollers are installed at the two ends of the running frames respectively, the two ends of the running frames are respectively provided with a damping adjustment mechanism, a tension sensor is installed on a support of the running machine frame, a tying strip is connected to the tension sensor, and a display device is installed at the top of the support of the running machine frame. The sprint training machine is simple in structure and convenient to operate, an actual competition can be conveniently simulated in the training process, the training efficiency of sprinters is improved, particularly, tension values generated in the running process of the sprinters can be led out through the tension sensor, and effective reference data are provided for the aim that coaches more scientifically adjust the exercise training methods and better exploit potential of the sprinters.

The invention discloses a preparation method of a polypyrrole / polyvinylidene fluoride composite film with a sandwich structure, and belongs to the application field of high-energy-storage-density dielectric capacitors. The problem that the breakdown strength is too low due to filler doping is solved. The composite film is divided into three layers, the upper layer and the lower layer are polyvinylidene fluoride films, and the middle layer is a doped polypyrrole / polyvinylidene fluoride composite film. The upper layer and the lower layer are prepared by a tape casting method; the middle layer is prepared by adopting an electrostatic spinning method; and the sandwich structure composite film is obtained through a hot pressing method. By introducing the sandwich structure, the breakdown strength of the composite film is greatly improved, and the composite film has relatively low loss. The polypyrrole / polyvinylidene fluoride composite film with the sandwich structure has excellent energy storage performance, is simple and safe in design scheme, has good potential in the field of energy storage, and particularly has more obvious effects in the aspects of miniaturization, light weight and integration of electrical and electronic equipment.

The invention relates to a synthetic method for a cyanophenyl compound. The method comprises the following steps: reacting a compound as shown in a formula (I) which is described in the specification with a compound (i.e., N-cyano-N-phenyl-p-toluenesulfonamide) as shown in a formula (II) which is described in the specification in an organic solvent in the presence of a catalyst, ligand and an auxiliary agent, and carrying out treatment after completion of the reaction so as to obtain a compound as shown in a formula (III) which is described in the specification. In the formula (III), R is selected from H, C1-6 alkyl groups, C1-6 alkyloxy groups, a nitro group, a cyano group or a phenyl group. The method employs cooperation of a specific reaction substrate, the catalyst, the ligand, the auxiliary agent and the organic solvent to realize high yield of the cyanophenyl compound; so a novel synthetic method for the cyanophenyl compound is provided, and the method has good industrial production prospect and potential.

The invention relates to polyvinyl chloride environment-friendly color paste. The polyvinyl chloride environment-friendly color paste is prepared from the following raw materials: 8-15 parts of PVC paste resin, 12-16 parts of PVC resin powder, 38-45 parts of pigments, 11-14 parts of light calcium carbonate, 45-55 parts of deionized water, 24-34 parts of glycerine, 12-18 parts of epoxidized soybeanoil, 8-12 parts of triethanolamine and 5-8 parts of methyl methacrylate. The environment-friendly color paste is obtained through adding new materials to the base stock and carrying out dispersing and grinding. According to the polyvinyl chloride environment-friendly color paste, scientific and reasonable proportioning is carried out by using novel environment-friendly materials, the conventionalenvironment-friendly safe raw materials are used in the formula, and the prepared environment-friendly color paste is good in safety, uniform in coloration, convenient in use, good in economical efficiency, low in manufacturing cost and little in harm, has good potential, is environmentally friendly and is in line with the inspection specifications of polycyclic aromatic hydrocarbons; the polycyclic aromatic hydrocarbons are not detected, so that the polyvinyl chloride environment-friendly color paste meets environmental requirements; the polyvinyl chloride environment-friendly color paste provided by the invention is extensively applied to the fields of medical care, sanitation, foods and the like.

The invention provides an S-shaped bent waveguide structure with offset and grooves. The S-shaped bent waveguide structure comprises an input straight waveguide, two bent waveguides with opposite curvatures and the same radius, an output straight waveguide, offset at each waveguide joint and the grooves filled with low-refractive-index media. The S-shaped bent optical waveguide structure with the offset and the grooves is characterized in that certain offset is introduced into the connection part of the input straight waveguide and a first bent waveguide section, the connection part of bent waveguide sections with opposite curvatures and the same radius and the connection part of a second bent waveguide section and an output straight waveguide section in an S-shaped waveguide respectively; two grooves with the same shape are added to the outer sides of two bent arc sections respectively, the grooves are filled with air, waveguide core widths are consistent, and a small difference value exists between the refractive indexes of a waveguide core layer and a wrapping layer. The S-shaped waveguide with a small refractive index difference can generate obvious bending loss under a small bending radius, transition loss and radiation loss existing in the S-shaped bent waveguide can be correspondingly reduced by introducing the offset and grooves with proper sizes, and therefore the low-loss transmission of the S-shaped bending waveguide is achieved. According to the invention, compact-size and low-loss optical path design in optical interconnection can be realized.

The invention discloses an immobilized Helianthus tuberosus L. fructan excision hydrolytic enzyme and a preparation method thereof. The method includes any one of the following methods that in the first method, D201 macroporous anion resin serves as a carrier of Helianthus tuberosus L. fructan excision hydrolytic enzyme liquor, after adsorption and cooling under the conditions that the temperature is 10-45 DEG C and pH is 4.0-6.0, a glutaraldehyde solution with the final concentration being 0.1-0.5% serves as a cross-linking agent, and immobilized enzyme is obtained after cross-linking, washing and drying at 2-25 DEG C; in the second method, Helianthus tuberosus L. fructan excision hydrolytic enzyme liquor is added into a sodium alginate solution to be evenly mixed, a mixed solution is prepared, the mixed solution is added into a calcium chloride solution dropwise, filtering is conducted after the mixture stands still and is immobilized, and filter cakes are washed and dried to obtain immobilized enzyme. The enzyme recycling and utilizing rate, operation stability and storage stability of the immobilized enzyme prepared through the technical scheme are remarkably increased, and accordingly the prepared immobilized enzyme has good potentials in actual industrial application.

The invention belongs to the technical field of preparation and application of functional nano materials, a gold nano-cluster synthesized by taking cellulase as a template is successfully prepared byadopting a one-pot method, the nano-cluster shows red fluorescence under the irradiation of a 365nm ultraviolet lamp, the maximum excitation wavelength is 560nm, and the maximum emission wavelength is680nm. The invention also provides a method for fluorescence quantitative detection of metal ions, papain and ascorbic acid by utilizing the cellulase gold nano-cluster. The method is simple and convenient to operate, short in time consumption and easy to realize. The cellulase-coated gold nano-cluster prepared by the invention not only enhances the activity of the cellulase, but also can be applied to the aspects of environmental monitoring, food and medicine, agricultural production and the like on the basis of the capability of tracking biomolecules by strong red fluorescence.

The invention discloses an urban black and odorous water body grading method based on spectral matching. The method comprises the following steps: dividing actually measured water body remote sensingreflectivity into six grades according to chromaticity judged in the field; taking the mean value of the actually measured water body remote sensing reflectivity of each grade as a standard spectrum of each grade; performing spectral analysis on the six levels of standard spectra to obtain spectral difference waveband ranges among different levels of water bodies; and constructing an urban black and odorous water body grading method based on spectral matching to distinguish water bodies of all grades one by one; and classifying the distinguished urban water bodies with various chromaticity grades into water body grades with different black and odorous degrees, wherein the overall grading precision is 77.03%.

The invention relates to environment-friendly PVC plastic dipping liquid. The environment-friendly PVC plastic dipping liquid comprises the following raw materials of: 37-42 parts of PVC resin powder,23-32 parts of PVC paste resin, 25-34 parts of pigment, 15-23 parts of butyl rubber powder, 12-18 parts of rubber oil, 11-15 parts of silicon crude rubber, 9-13 parts of vinyl silica gel, 8-15 partsof light nano calcium carbonate, 5-9 parts of nano zinc oxide, 7-14 parts of milk crude rubber, 7-18 parts of tripalmityl citrate, 3-5 parts of organic stabilizer and 30-46 parts of ionic liquid, newmaterials are added to the basic raw materials, and dispersion and grinding are performed, so that the environment-friendly PVC plastic dipping liquid. The environment-friendly PVC plastic dipping liquid has good safety, no pollution, uniform coloring, convenient use, good economy, low manufacturing cost, good potential, a good plastic dipping effect and a good plastic dipping property, and is environmentally friendly.

The invention provides a method for treating biogas slurry, which comprises the following steps: introducing biogas slurry into an aerobic bioreactor, treating under the action of aerobic activated sludge to obtain aerobic effluent, wherein the inoculation amount of the aerobic activated sludge is 10-14 g / L, the hydraulic retention time is 1-3 days, the dissolved oxygen concentration is 3.8-4.2 mg / L, and the aeration rate is 0.4-2.0 L / min. The pH of the aerobic effluent treated according to specific parameters is reduced, the SS and turbidity removal rate of the effluent is maximum, the content of various nutrient elements is highest, and the removal rate effect of organic matters is optimal. The aerobic effluent is separated through an ultrafiltration membrane, so that SS and turbidity inthe biogas slurry can be further reduced, the separated effluent is concentrated through a reverse osmosis membrane, so that the content of various nutrient elements and humic acid in the RO concentrated solution can be effectively increased, and meanwhile, the concentration of heavy metal ions in the RO concentrated solution cannot be increased. The obtained RO permeate liquid can be directly discharged after reaching the standards. The method provided by the invention effectively combines biogas slurry resource recovery and up-to-standard discharge, and has a wide application prospect.

The invention relates to water-based carbon-black environment-friendly color paste. The water-based carbon-black environment-friendly color paste comprises the following raw materials of: 89-95 partsof carbon black, 29-35 parts of pearl powder, 19-26 parts of glycerin, 49-55 parts of deionized water, 16-25 parts of ethylene glycol, 9-18 parts of nano silica, 7-14 parts of hydroxyethyl cellulose salts, 6-13 parts of water-based polyacrylate, 5-11 parts of an anti-foaming agent, 4-7 parts of mildew preventive and 9-15 parts of zinc stearate. Th new environment-friendly materials are utilized for scientific and reasonable matching, the conventional environment-friendly safe raw materials are applied to a formula, and the prepared water-based carbon-black environment-friendly color paste hasgood safety, uniform coloring, convenient use, good economy, low manufacture cost, good potential, environmental protection and small harm to the environment, and meets inspection specifications of polycyclic aromatic hydrocarbons, no polycyclic aromatic hydrocarbons are detected, and environmental requirements are met; therefore, the water-based carbon-black environment-friendly color paste can be widely applied to medical, health, paint, machinery, food and other fields.

The invention relates to PVC environment-friendly organic pigment which comprises 30-38 parts of PVC paste resin, 12-16 parts of silicon collagen, 13-17 parts of cyclohexanone constituent resin liquid, 11-15 parts of epoxy soybean oil, 16-23 parts of PVC resin powder, 24-35 parts of pigment, 3-6 parts of sterilizing agent, 8-14 parts of fatty alcohol polyoxyethylene ether, 15-22 parts of glycerin,26-43 parts of deionized water, 10-13 parts of stearic acid, 6-9 parts of barium stearate, 11-19 parts of light calcium carbonate, 2-3 parts of ultraviolet absorber and 7-12 parts of nano silicon dioxide. The PVC environment-friendly organic pigment is obtained by adding novel materials into base materials, dispersing and grinding. The PVC environment-friendly organic pigment is high in safety, environment-friendly, pollution-free, uniform in coloring, convenient to use, high in economic efficiency, low in manufacturing cost, great in potential, free of aromatic hydrocarbon compound, safe andnontoxic.

The invention provides an orally-administered decoction and an externally-applied poultice for treating cholelithiasis. The orally-administered decoction and the externally-applied poultice have the advantages that precise cholelithiasis treatment and prevention effect is achieved; due to non-invasion property and low side effect of traditional Chinese medicine as well as compressive synergistic effects such as effect on biliary tract dynamics, proportion change of components in bile, bile duct infection reduction and application in a perioperative period, the traditional Chinese medicine has good potential and promising development prospect in cholelithiasis treatment.

The invention discloses a tripeptide with ACE (angiotensin converting enzyme) inhibiting activity and an application thereof. The amino acid sequences of the ACE inhibiting tripeptide are separately HGR, WAK, CMK, AMR, LEW and FPK, the molecular weights of which are separately 368.40, 403.49, 380.52, 376.48, 446.51 and 390.49 Da. The ACE inhibiting peptide has a remarkable inhibiting effect to theACE, has the characteristics being safe, free of toxic and side effects, easy to absorb and the like, can be applied to foods, health-care products and blood pressure reducing drugs as functional components, and has a wide application prospect and quite important significance.

The invention provides a method for measuring mercury element content of gangue or fly ash. The method comprises the following steps of S1, test sample digestion, S2, electrochemical detection, and S3, mercury content calculation. The method utilizes unique processes and technological parameter selection, produces a good measurement result, has high accuracy and sensitivity, provides a brand new measurement method for mercury element content determination, and has good application value and prospect in industry and scientific research.

The invention discloses a water pump convenient to assemble and good in stability. The water pump comprises a mounting plate, a machine body is mounted on the upper end of the mounting plate, two connecting pipes are mounted on one side of the machine body, a sleeve ring is fixed to one ends of the connecting pipes, the connecting pipes are slidingly sleeved with sliding sleeves, two sleeves are mounted on the sleeve ring in a penetrating manner, and ejector rods are sleeved with the sleeves. The water pump can be rapidly and conveniently connected with an external water pipe with a flange disc, the connection method is simple, through the multiple manners, connection firmness is ensured, connection seal is improved, the leakage condition is avoided, the application range can be effectively improved, the water pump can be conveniently connected with external water pipes of multiple specifications, meanwhile, during operation, whole stability can be well ensured, when the water pump isnot used, the protection capacity is improved, connecting parts are prevented from being damaged, the influence of vibration or collision on the machine body can be avoided, the service life is prolonged, and work quality during use can be ensured.

The invention relates to a silicon carbide / carbon fiber reinforced composite material capable of absorbing radar waves and a preparation method thereof. In the present invention, polycarbosilane is dissolved in xylene for spinning, washed with water, oiled and dried to obtain silk thread; under nitrogen atmosphere, the silk thread is sintered at high temperature to obtain silicon carbide ceramic fiber; then, rice straw is used as raw material to extract Among them, the cellulose fibers are processed by pre-oxidation, pre-carbonization, carbonization and other processes to obtain carbon fibers; silicon carbide fibers and carbon fibers are combined to obtain silicon carbide / carbon fiber composite fiber mats; finally, polyphenylene sulfide particles are combined with The silicon carbide / carbon fiber composite fiber mat is mixed by a hot press to prepare a silicon carbide / carbon fiber reinforced composite material with radar wave absorption. The silicon carbide / carbon fiber reinforced composite material prepared by the invention exhibits obvious radar wave-absorbing performance, has a simple preparation process, has wide sources of raw materials, and has good market application prospects in the military field.