58results about How to "Keep basic features" patented technology

The invention relates to a graphene / titanium dioxide composite material, a preparation method and application thereof. The graphene / titanium dioxide composite material comprises: graphene and titaniumdioxide particles closely attached to the graphene sheet. According to the invention, graphene and titanium dioxide are selected for compounding to obtain an efficient photocatalyst with the excellent properties of graphene and titanium oxide simultaneously.

The invention discloses a method and system for dynamically suppressing power line impulse noise. A power line impulse input code stream is modulated, and part of peak values of each OFDM symbol that are obtained are quantized and coded, and are then input to a power line channel together with the OFDM symbols; a receiving end receives signals on a power line, the abovementioned part of peak values are recovered from coded signals, an average value of the peak value information is calculated, a received OFDM symbol sampling value is compared with the average value, thereby judging the magnitude of noise; three different noise suppression methods of deep amplitude limiting, amplitude limiting and blanking are used to process each OFDM symbol according to difference of the magnitude of noise; and blanking and amplitude limiting thresholds of the three noise suppression methods are determined by using a threshold value optimization method, and data after processing is completed are sent to an OFDM demodulation module. The method for dynamically suppressing the power line impulse noise adopts different noise suppression methods to process noise according to different situations of the magnitude of impulse noise. The deep amplitude limiting method keeps the basic features of signals; the blanking method performs zero setting on detected impulse noise, and immediately eliminates interference among the signals without affecting system performance; and the amplitude limiting mode is easy to realize.

The invention relates to a method for preparing gradient metal-containing three-dimensional network ceramic. The method comprises the preparation of a gradient metal-containing ceramic precursor and the sintering of the ceramic precursor, wherein the preparation of the gradient metal-containing ceramic precursor comprises selection of organic foam and preparation of a ceramic size, preparation of the precursor by virtue of an organic foam steeping method, and the sintering of the ceramic precursor. The gradient metal-containing three-dimensional network ceramic can be applied to preparation of a ceramic enhanced metal-based composite material, a mode of only having mechanical bonding of a boundary between metal ceramic and metals in a composite material is improved into a mode of mixing mechanical bonding with diffusion bonding, and the bonding strength of the ceramic and metal phase in the composite material can be greatly enhanced.

The invention provides a large scale production technology for a dental pulp stem cell. The large scale production technology comprises following steps of (1) separating and extracting the dental pulp stem cell; (2) amplifying the dental pulp stem cell through two dimension cultivation; (3) detecting the dental pulp stem cell; (4) cultivating the dental pulp stem cell on a large scale; (5) freeze preserving the dental pulp stem cell; and (6) freeze preserving the dental pulp stem cell for a long term. The invention provides an in vitro large-scale cultivating and amplifying method for a dental pulp stem cell, establishes a long-term, standard and systematized freeze preserving system for a high quality high activity dental pulp stem cell, so that the method can provide a high enough quality stem cell resource for clinic and scientific researches, and has low cost and a wide application prospect.

The invention provides a scale production process of adipose-derived stem cells. The production process comprises the following steps: (1) separating and extracting adipose-derived stem cells; (2) culturing and amplifying the adipose-derived stem cells; (3) detecting the adipose-derived stem cells; (4) culturing the adipose-derived stem cells on a large scale; (5) refrigerating the adipose-derived stem cells for preserving; (6) preserving the adipose-derived stem cells for a long time in a refrigerating manner. An in-vitro scale culturing and amplifying method for adipose-derived stem cells is provided, and a long-term, standard and systemic refrigeration preserving system is established for high-quality and high-activity adipose-derived stem cells, so that sufficient high-quality adipose-derived stem cell resources are provided for clinical treatment and scientific research. The process is low in cost and wide in application prospect.

The invention relates to a nitrogen-doped graphene / nano titanium dioxide photocatalyst as well as a preparation method and application thereof. The nitrogen-doped graphene / nano titanium dioxide photocatalyst contains nitrogen-doped graphene, and titanium dioxide supported to the nitrogen-doped graphene, wherein the nitrogen-doped graphene contains a nitrogen source; the nitrogen source comprises graphite nitrogen and pyrrole nitrogen; and a mass ratio of the nitrogen-doped graphene to titanium dioxide is (0.005-0.05):1, preferably (0.01-0.02):1.

The invention relates to a method for making grape pomace dietary fiber nutritious biscuits. Grape pomace produced in a wine making process is rich in nutrients, but is always used as feeds and fertilizers and even buried, so that the utilization rate is low. The method comprises the following steps of collecting grape pomace produced by wine making, separating skin and seeds and drying in medium and short-wavelength infrared drying equipment respectively, performing superfine pulverization, adding the treated skin and seeds into a mixture of an aqueous solution of accessories and egg juice together with low-gluten flour, and adding peanut oil to obtain a dough; performing rolling, forming, baking, cooling and packaging. According to the method, the grape pomace which is produced by wine making and is rich in nutrients and dietary fibers is dried into superfine powder, and the superfine powder is added into biscuits to make the grape pomace dietary fiber nutritious biscuits; according to the grape pomace dietary fiber nutritious biscuits, basic characteristics of biscuits are maintained, the nutrients such as the dietary fibers, anthocyanin and polypehnols in the grape pomace in the biscuits are highlighted, the nutritional value is improved, and grape-flavored biscuits are made.

The invention relates to a method for preparing a hydroxyapatite nano-composite supramolecular hydrogel with biocompatibility. A method for preparing an injectable hydroxyapatite nano-composite supramolecular hydrogel is characterized in that the method comprises the following steps of 1) selecting, mixing and ultrasonic dispersing a polyethylene oxide-poly(propylene oxide)-polyethylene oxide triblock polymer, a hydroxyapatite nanoparticle and water with the ratio of 10-200mg:0.2-100mg:1mL, thus obtaining the suspension of the hydroxyapatite nanoparticle; 2) according to the polyethylene oxide-poly(propylene oxide)-polyethylene oxide triblock polymer, the hydroxyapatite nanoparticle, an Alpha-cyclodextrin and water with the ratio of 10-200mg:0.2-100mg:80-400mg:1mL and selecting Alpha-cyclodextrin and water to prepare the water solution of Alpha-cyclodextrin; and 3) mixing, ultrasonic dispersing and standing the suspension obtained in the step 1) and the Alpha-cyclodextrin water solution obtained in the step 2), thus obtaining the injectable hydroxyapatite nano-composite supramolecular hydrogel. The preparation process is safe, simple and effective.

The invention discloses carboxyl-terminated phosphorus-containing copolyester which is formed by randomly connecting and combining structural units shown as I, II and III according to carboxyl and hydroxyl functional groups, and the Mw of the carboxyl-terminated phosphorus-containing copolyester is 1.1*10<3>-1.3*10<4> g.mol<-1>. The invention further discloses a preparation method of the carboxyl-terminated phosphorus-containing copolyester, a halogen-free flame retardant biology-based pressure sensitive adhesive composed of the carboxyl-terminated phosphorus-containing copolyester and application. The copolyester is biology-based phosphorus-containing copolyester, the halogen-free flame retardant pressure sensitive adhesive formed by the copolyester and renewable resource epoxidized plant oil not only maintains the basic characteristics and good adhesive strength of a biology base, but also achieves the excellent halogen-free flame retardant properties, and the blank of biology-based halogen-free flame retardant pressure sensitive adhesive products is filled up; in addition, preparation is easy and mature, solvent is not used, the cost is low, pollution to the environment is little, and application and popularization are convenient.

A method for producing pear residue dietary fiber biscuits includes the specific steps that firstly, butter is softened and beaten at room temperature; secondly, flour is mixed with the mixture evenly; thirdly, dough is prepared; fourthly, the dough is fermented; fifthly, the dough is pressed by means of a mould; sixthly, baking is conducted; seventhly, cooling and packaging are carried out. The pear residue dietary fiber biscuits are beneficial to gastro-intestinal digestion, and have the advantages of regulating intestinal balance, improving intestinal flora, keeping human intestinal tract circulation smooth, clearing away toxin and relaxing the bowels, reducing diabetes, improving human immunity, reducing kidney calculi and preventing cardiovascular diseases, diabetes and hypertension. Compared with traditional biscuits, the pear residue dietary fiber biscuits have the advantages of being low in grease, sugar and calorie. The practical manufacturing method of the pear residue dietary fiber biscuits is provided for utilization of residues generated in juice production, maximum resource utilization is achieved, and the function of saving resources is achieved. The biscuits have good health-care functions, market prospects and popularization value.

The invention discloses a rotary type capillary viscometer, comprising an upper liquid receiver, a timing ball, a first capillary, a suspension horizontal ball, a lower liquid receiver, and a rise liquid tube, wherein, the upper liquid receiver, the timing ball, the first capillary, the suspension horizontal ball, the lower liquid receiver, and the rise liquid tube are connected orderly, the suspension horizontal ball is connected with an liquid injection pipe, a bypass pipe connected with the liquid injection pipe is arranged between the timing ball and the upper liquid receiver, the volume of the upper liquid receiver is larger than that of the timing ball, the capillary viscometer is arranged in a bearing container, the bearing container is provided with a rotary unit of the rotary bearing container, the rotary unit comprises a carriage and a base, the carriage is provided with an upper gear and a lower gear, the upper gear is in a linkage with the lower gear, and the lower gear isin a linkage with the bearing container. According to the invention, the capillary viscometer is embedded in the bearing container, the liquid rising through rotation method is combined with bearing through the bearing container, thus the cycle measurement of the viscosity of a volatile mixture (or pure) solution system, unstable liquid or liquid of which steam has toxicity in the air can be realized, and high pressure can be born.

The invention discloses a voice processing method used for an electrical cochlea. The voice processing method used for the electrical cochlea comprises the steps of pre-processing, namely carrying out pre-processing on a voice signal input through a microphone; Hilbert-Huang transformation, namely carrying out Hilbert-Huang transformation on the pre-processed voice signal to obtain Hilbert-Huang transformation signals of multiple channels; modulation, namely processing the Hilbert-Huang transformation signal of each channel to obtain an amplitude signal and a frequency signal which correspond to the Hilbert-Huang transformation signal of the channel, modulating a biphase pulse by means of the frequency signal corresponding to the Hilbert-Huang transformation signal of each channel to obtain a biphase pulse modulation frequency signal corresponding to the Hilbert-Huang transformation signal of the channel, and modulating the biphase pulse modulation frequency signal corresponding to the Hilbert-Huang transformation signal of each channel by means of the amplitude signal corresponding to the Hilbert-Huang transformation signal of the channel to obtain a channel modulation signal used for driving an electrode corresponding to the channel.

The invention relates to a preparing method for wear-resisting soft polyester bulked continuous filaments. The method includes the first step of preparing talcum powder master batch, wherein dried modified superfine talcum powder, a carrier, a compatibilizer, dispersant, antioxidant and ester exchange inhibitor are added into a high-speed mixer to be mixed and are blended in a molten mode and granulated through a double-screw extruder; the second step of spinning, wherein polyethylene glycol terephthalate or polypropylene glycol terephthalate and polybutylene glycol terephthalate slices are mixed, dried, and mixed with dried talcum powder master batch, and the mixture is added into a feed screw of a BCF spinning unit to prepare the polyester bulked continuous filaments through a one-step mode. Compared with pure polyester fibers, wear resistance of the two kinds of obtained bulked continuous filaments is improved by 30% or more, moreover, the PBT / PET bulked continuous filaments have fiber characteristics such as high rebound resilience similar to PBT-BCF and soft handfeel, and heat stability of the physical form is obviously improved; the obtained PTT / PBT bulked continuous filaments have the fiber characteristic similar to that of PTT-BCF, and raw material cost is reduced.

The invention relates to an ultrasonic driving optical-fiber winding filter, solving the problems that the traditional ultrasonic optical-fiber narrow-band filter has large space occupation, and an ultrasonic driving pyramid only can drive single optical fiber. The ultrasonic driving optical-fiber winding filter comprises a wedge-shaped ultrasonic amplitude transformer, a piezoelectric driver (an ultrasonic transducer), a sound absorbing material and an optical-fiber winding, wherein the piezoelectric driver (the ultrasonic transducer) is bonded at the bottom of the wedge-shaped ultrasonic amplitude transformer, the sound absorbing material is bonded at the bottom of the piezoelectric driver, and the optical-fiber winding is bonded to a wedge-shaped pyramid cutting edge. The ultrasonic driving optical-fiber winding filter filters light waves with a specific wavelength, which is transmitted in optical fiber, solves the defects that the traditional ultrasonic driving optical-fiber filter is easy to break off and damage, and the ultrasonic driving pyramid is not easy to process and maintains the fundamental characteristics of the general ultrasonic driving optical-fiber filter and realizes adjustable filtering position and adjustable filtering intensity, and therefore, the ultrasonic driving optical-fiber winding filter can be directly applied to an optical-fiber access.

The invention relates to an image skeletonization method of a printing circuit board based on FPGA which firstly inputs an image to analyze the neighborhood of each pixel and count the number n with a pixel value of 1 among the surrounding 8 pixels and the pixel with a switch time S between 0 and 1, with an output being 1 and a preservation being 1; then, judging whether a central pixel is 1; deleting the central pixel if the central pixel is zero; when n is more than 1 but is equal to or less than 6, S is equal to 2, and circulating time is odd, investigating the pixels on the right and lower directions of the central pixel and the pixels on the left and right directions of the central pixel, judging whether 0 and 1 are cross, outputting 0 and deleting the pixel; when n is more than 1 but is equal to or less than 6, S is equal to 4, n is equal to 4, and the circulating time is odd, investigating the pixels on the upper-left and upper-right directions of the central pixel and the pixels on the lower-left and lower-right directions of the central pixel; judging whether the lower side pixel of the central pixel is 1 and whether 0 and 1 are two communicating areas; if the pixel is 0, deleting the pixel. The invention can fast and accurately withdraw the image skeleton.

The invention provides a liquid crystal polymer compound for electroplated decoration. The liquid crystal polymer compound comprises the following raw materials in percentage by weight: 40-90% of liquid crystal polymer, 3-20% of thermoplastic elastomer, 0-30% of polyamide resin, 0-40% of inorganic ore powder and 0-2% of coupling agent, wherein the melt index of the thermoplastic elastomer is higher than that of the liquid crystal polymer. The invention also provides a preparation method of the liquid crystal polymer material for electroplated decoration. The liquid crystal polymer material provided by the invention can satisfy electroplating requirements, and can be treated by an environment-friendly potassium permanganate roughening solution, thereby conforming to the development of environment-friendly electroplating; after electroplating, the electroplating binding force between the material and the surface of an electroplating coating layer can be up to 10N or above, thereby ensuring the use safety; and meanwhile, the liquid crystal polymer material has excellent mechanical properties.

The invention relates to the field of data compression and discloses a lossy compression method and device for vector spatial data in order to solve a technical problem that the compression ratios of pattern spots in different sizes are inconsistent in the prior art. The method comprises steps of: acquiring vector spatial data to be compressed, wherein the vector spatial data includes at least two polygons; according to a certain sequence, successively selecting three points from each line of the first polygon; successively recording an intersection angle between a connecting line between the first point and the second point in the three points and a connecting line between the second point and the third point in the three points, wherein the intersection angle corresponds to the second point in the three points; ordering the intersection angles from large to small; computing the number N of the points, required to be deleted, on the corresponding line according to the compression ratio, wherein the N is a positive integer; and deleting the points, corresponding to the first N intersection angles, on the corresponding line. The method and the device have a technical effect that approximate compression ratios of the pattern spots in different sizes are achieved after data compression is executed, and guarantee the basic characteristic of original data.

The invention provides aluminum foil paper with laser holographic security and a manufacturing process thereof. The aluminum foil paper with laser holographic security comprises a body paper layer, a plastic-based membrane and an aluminum foil layer, wherein the surface of the body paper layer is plated with a layer of aluminum film by virtue of a vacuum aluminizing method, so that the aluminum foil layer is formed; the surface of the plastic-based membrane is coated with a polyurethane layer, so that an information carrying layer with laser holographic patterns is formed; and the information carrying layer is subjected to die pressing by virtue of a metal matrix, so that a transparent laser holographic film is obtained. The surface of the body paper layer is plated with a layer of aluminum film by virtue of the vacuum aluminizing method, so that the aluminum foil paper is preliminarily formed and has the advantages of less material consumption, convenience in processing and high molding rate; by virtue of the laser holographic film formed by polyurethane, molding of anti-fake marks is realized, and polyurethane has a relatively high optical refractive index; and the polyurethane film serving as the laser holographic film not only reserves the basic characteristics of common aluminum-plated films with laser holographic security, but also is enhanced in anti-fake performance, lowered in cost and greatly expanded in application functions.

The invention relates to a method for processing a recombined bamboo with small-diameter bamboo wood, belonging a green removing process being dominated by a green scraping method and providing a whole set of method suitable for processing the recombined bamboo with small-diameter bamboo wood. The method comprises following eight sequential steps of: A. sawing off an original bamboo with a disk saw; B. slicing the sawn bamboo wood with a multichip slicer; C. scraping green on bamboo sheets; D. rolling the bamboo sheets with green scraped through a primary rolling wheel set into flexible bamboo sheets connected with each other; E. boiling the rolled bamboo sheets to remove sugar; F. drying the rolled bamboo sheets; G. coating glue on the dried bamboo sheets; and H. carrying out cold forming or hot-press gluing on the bamboo sheets with glue so as to form novel recombined bamboo. According to the method, problems of difficulty in removing green, low use ratio of the bamboo wood, high production cost, and difficulty in processing small-diameter bamboos in the prior art are solved.

The invention provides a polyphenylene sulfide compound for environment-friendly electroplating. The compound comprises, by weight, 40-90% of polyphenylene sulfide resin, 3-20% of thermoplastic elastomer, 0-30% of polyamide resin, 0-40% of inorganic mineral powder and 0-2% of coupling agent, wherein melt index of the thermoplastic elastomer is higher than that of the polyamide resin and the polyphenylene sulfide resin. The invention further provides a preparation method of the compound. The polyphenylene sulfide compound is excellent in processing performance and mechanical performance, can be treated by using environment-friendly potassium permanganate roughing liquid and is suitable for development of environment-friendly electroplating; after electroplating, electroplating binding force with the surface of an electroplating coating reaches higher than 10N, and safety in use is guaranteed.

The invention provides an aliphatic polyamide compound for environment-friendly electroplating. The polyamide compound is prepared from the following raw materials in percentage by weight: 40 percentto 90 percent of aliphatic polyamide resin, 3 percent to 20 percent of a thermoplastic elastomer, 0 percent to 2 percent of a coupling agent and 0 percent to 40 percent of inorganic ore powder, wherein the melt index of the thermoplastic elastomer is higher than that of the aliphatic polyamide resin. The invention further provides a preparation method of the aliphatic polyamide compound for the environment-friendly electroplating; the aliphatic polyamide compound provided by the invention can be treated by utilizing an environment-friendly potassium permanganate roughening solution, so that the aliphatic polyamide compound is suitable for the development of the environment-friendly electroplating; after the electroplating is carried out, the electroplating binding force between the polyamide compound and the surface of an electroplating cladded layer can reach 10N or more; the utilization safety is ensured.

The invention relates to a fire image edge extraction processing method, a terminal and a system, and belongs to the technical field of fire flame extraction. The method comprises the steps of obtaining a fire image of a target object; performing pixel screening on the fire image by using pixel RGB and HSV information to obtain a first fire binary image of the target object, converting the fire image into a grayscale image, and obtaining a second fire binary image of the target object by using an Otsu algorithm; performing AND processing on the first fire binary image and the second fire binary image to obtain a third fire binary image of the target object; and performing edge extraction on the third fire binary image to obtain a first target flame edge extraction image of the target object. Compared with a classic canny algorithm and a local interference removal improved canny algorithm, the fire image edge extraction effect is better, and therefore the accuracy of fire flame extraction can be improved.

The invention provides a polyamide compound for environment-friendly electroplating. The polyamide compound is prepared from the following raw materials in percentage by weight: 40 percent to 90 percent of aromatic-ring-containing polyamide resin, 3 percent to 20 percent of a thermoplastic elastomer, 0 percent to 20 percent of aliphatic polyamide, 0 percent to 2 percent of a coupling agent and 0 percent to 40 percent of inorganic ore powder, wherein the melt index of the thermoplastic elastomer is higher than that of the aromatic-ring-containing polyamide resin and the aliphatic polyamide. Theinvention further provides a preparation method of the polyamide compound for the environment-friendly electroplating; the polyamide compound provided by the invention has better electroplating performance and mechanical property and can be treated by utilizing an environment-friendly potassium permanganate roughening solution, so that the polyamide compound is suitable for the development of theenvironment-friendly electroplating; after the electroplating is carried out, the electroplating binding force between the polyamide compound and the surface of an electroplating cladded layer can reach 10N or more; the utilization safety is ensured.

The invention relates to a preparation method of mosquito repellent viscose fiber. The preparation method comprises the following steps: preparing a l PMD (p-menthane-3,8-diol)l dispersion solution ora lemon eucalyptus leaf oil dispersion solution, preparing a sodium carboxymethyl cellulose solution and preparing a uniform mixed solution of the dispersion solution and the sodium carboxymethyl cellulose solution; continuously blending the mixed solution and a spinning viscose stock solution in a ratio of 1:50-1:20 in a pre-spinning injection device, feeding the solution in spinning equipment for spinning after uniform dispersion, and performing drafting, cut-off, desulfurizing, washing, bleaching, pickling, washing, oiling, drying and the like on fiber obtained by spinning to prepare the mosquito repellent viscose fiber. A mosquito repellent is prepared from lemon eucalyptus leaf oil and extracts of the lemon eucalyptus leaf oil, and has the characteristics of being natural and safe; the fiber is easy to prepare and low in cost; the mosquito repellent viscose fiber not only can maintain basic characteristics of viscose fiber, but also has a long-acting mosquito repelling function,can be used for preparing textiles with a mosquito repelling function, and has good industrialization and market application prospects.

The invention discloses a core-shell structured fire extinguishing agent for a metal sodium fire and a preparation method thereof. The fire extinguishing agent is composed of the following componentsby mass: 60.0 to 85.0% of expanded graphite, 1.0 to 8.0% of a binder and 15.0 to 35.0% of a covering agent. According to the invention, powder particles of the fire extinguishing agent prepared by using the preparation method provided by the invention are sprayed onto the metal sodium fire; the expanded graphite has good heat conduction effect, so the temperature of metal sodium can be rapidly reduced; meanwhile, the covering agent can form a compact and thin film on the surface of burning metal sodium, so the burning metal sodium is isolated from surrounding air, and the effect of extinguishing fire by smothering is exerted. Thus, the fire extinguishing agent provided by the invention has greatly-improved fire extinguishing efficiency compared with a single graphite powder, and can achieve the effect of rapid and thorough fire extinguishing.

The invention discloses anti-corrosion insulation glue. The anti-corrosion insulation glue is prepared from the following raw materials in parts by weight: 55 to 58 parts of base glue, 28 to 32 partsof asphalt, 25 to 28 parts of methyl vinyl silicone rubber, 16 to 18 parts of polybutadienoic acid resin, 15 to 18 parts of urea formaldehyde resin, 3 to 5 parts of perlite powder, 3 to 4 parts of graphite, 2 to 6 parts of ceramic powder, 1 to 2 parts of an anhydride curing agent, 2 to 5 parts of chlorosulfonated polyethylene, 0.8 to 1.5 parts of an emulsifying agent, 1.2 to 1.6 parts of a plasticizing agent, 6 to 7 parts of organic tin, 5 to 7 parts of antimonous oxide, 3 to 6 parts of polytetrafluoroethylene, 4 to 7 parts of carbon fiber and 5 to 8 parts of an antioxidant. The invention alsoprovides a preparation process of the anti-corrosion insulation glue. By adopting the polytetrafluoroethylene and the carbon fiber, the anti-corrosion insulation glue disclosed by the invention has high corrosion resistance; through sufficient reaction of the raw materials, the corrosion resistance and the adhesion of the prepared anti-corrosion insulation glue can be increased to a large extent.A preparation method is simple, the operation is convenient, the problem that common insulation glue is poor in corrosion resistance is solved, the adhesion is enhanced, and the anti-corrosion insulation glue is suitable for being popularized and used.

The invention provides a large-scale production process of uterine membrane stem cells. The process comprises the following steps: (1) performing separation extraction and primary culture on the uterine membrane stem cells; (2) performing culture amplification on the uterine membrane stem cells; (3) performing large-scale culture on the uterine membrane stem cells; (4) detecting the uterine membrane stem cells; (5) storing the uterine membrane stem cells in a freezing manner; and (6) storing the uterine membrane stem cells in the freezing manner for a long time and performing recovery detection at regular time. According to the process, the uterine membrane stem cells are obtained from the menstrual blood of a female at a child-bearing period, so that a large quantity of high-quality uterine membrane stem cells rich in functional activity can be obtained in short time by utilizing an in-vitro culture amplification method; and the uterine membrane stem cells are stored in the freezing manner for a long time under the environment of -196 DEG C after being detected to be qualified, thereby providing a large quantity of uterine membrane stem cell resources for clinical and scientific researches in the future. Thus, the great social value and significance is achieved.

The invention belongs to the technical field of laser anti-counterfeiting, and provides a laser holographic anti-counterfeiting film and a preparation method thereof. Firstly, a binding agent is prepared, the prepared binding agent and ink are mixed, the mixed material coats the surface of a base film, an anti-counterfeiting information coating material is added to form an ink layer, and finally, a polyurethane membrane coats the ink layer to obtain the laser holographic anti-counterfeiting film. Compared with a conventional method, the method provided by the invention uses the polyurethane membrane as a laser holographic anti-counterfeiting film, basic characteristics and excellent performance of a common aluminum coated laser holographic anti-counterfeiting film are retained, and meanwhile the binding agent reinforces interface bonding between the base film and the polyurethane membrane, improvement of film forming strength and toughness is facilitated, temperature resistance and weathering resistance of the film are improved, the reflectivity and the refractive index of the polyurethane membrane are effectively improved, anti-counterfeiting performance is reinforced, the process is simple, the costs are low and the laser holographic anti-counterfeiting film is easy to produce in a large scale.

The invention relates to a method for preparing a hydroxyapatite nano-composite supramolecular hydrogel with biocompatibility. A method for preparing an injectable hydroxyapatite nano-composite supramolecular hydrogel is characterized in that the method comprises the following steps of 1) selecting, mixing and ultrasonic dispersing a polyethylene oxide-poly(propylene oxide)-polyethylene oxide triblock polymer, a hydroxyapatite nanoparticle and water with the ratio of 10-200mg:0.2-100mg:1mL, thus obtaining the suspension of the hydroxyapatite nanoparticle; 2) according to the polyethylene oxide-poly(propylene oxide)-polyethylene oxide triblock polymer, the hydroxyapatite nanoparticle, an Alpha-cyclodextrin and water with the ratio of 10-200mg:0.2-100mg:80-400mg:1mL and selecting Alpha-cyclodextrin and water to prepare the water solution of Alpha-cyclodextrin; and 3) mixing, ultrasonic dispersing and standing the suspension obtained in the step 1) and the Alpha-cyclodextrin water solution obtained in the step 2), thus obtaining the injectable hydroxyapatite nano-composite supramolecular hydrogel. The preparation process is safe, simple and effective.