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40results about How to "Safe method of operation" patented technology

Method and device for plants carbon isotope labelling

The invention discloses a method and device for marking plant carbon isotopes. The method comprises following steps: sowing seed in the cultivating disk which located in the soil; putting cultivating disk into air- tight box; adding sodium carbonate marked with carbon-14 or carbon- 13 under air- tight condition, carrying out reaction with hydrochloric acid in reaction tank to generate carbon dioxide for plant photosynthesis. The carbon dioxide in box is mixed with electrical fan, and light is replenished with daylight lamp, the temperature and humidity are reduced by using cooling tube, and water is added into cultivating disk with fluid infusion bottle. The plant marked with carbon- 13 or carbon- 14 is got after cultivation. The invention is characterized by simple and safe operation, prevention of carbon marked with carbon isotopes escape, increased utilization coefficient of carbon isotopes, suitability for carbon isotopes mark for various plants, especially for woody plant.
Owner:INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI

Method for analyzing ferrosilicon alloy components for X-ray fluorescence spectrum analysis

The invention discloses a method for analyzing ferrosilicon alloy components for X-ray fluorescence spectrum analysis. A method for preparing a sample comprises the following steps of: selecting a proper oxidant; adding a flux into a platinum crucible, putting the platinum crucible in a high temperature furnace, and melting the flux at high temperature to manufacture a wall built-up flux crucible with the basement of flux; mixing a ferrosilicon alloy test sample, the flux and the oxidant, pouring the mixture into the flux crucible, and covering a certain amount of mixed flux; and putting the flux crucible filled with the ferrosilicon alloy test sample, the flux, the oxidant and the mixed flux into the high temperature furnace, preliminarily oxidizing at low temperature, shifting into a high temperature zone, and melting at high temperature to prepare the ferrosilicon alloy test sample glass sample for the X-ray fluorescence spectrum analysis. In the technical scheme, elements are uniformly distributed in the prepared glass sample, and the glass sample has no particle effect and can be preserved for a long time; moreover, the operation method is simple and safe, the preparation time of the sample is short, and primary and secondary quantity elements in the ferrosilicon alloy are rapidly and accurately measured.
Owner:MAANSHAN IRON & STEEL CO LTD

Method for detecting food pathogen by electrochemical luminescence gene sensor on basis of magnetic in-situ amplification

The invention discloses a method for detecting food pathogen by an electrochemical luminescence gene sensor on the basis of magnetic in-situ amplification. The method comprises the following steps: designing three PCR (Polymerase Chain Reaction) primers by using highly conserved DNA (deoxyribonucleic acid) sequence of food pathogen as a detection target segment; preparing a magnetic primer from the primer 1, preparing a TBR (tris (bipyridine) ruthenium) primer from the primer 2, and using the primer 3 as a common PCR primer, wherein when a target gene segment exists in the detection system, the magnetic primer can be amplified as the PCR process goes on, and the magnetic particles can directly have a TBR-modified double-chain nucleic acid product; when no target gene segment exists, the magnetic primer can not be amplified, and thus, no product with signal molecules can appear; and carrying out magnetic separation and in-situ electrochemical luminescence detection. The method can be used for quickly, sensitively, safely and specifically detecting the target gene segment, and is very suitable for popularization in the actual detection process.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Matrix modifying reagent for detecting content of lead and cadmium elements in whole blood and application thereof

The invention discloses a matrix modifying reagent for detecting content of lead and cadmium elements in whole blood, which comprises the following compositions: diammonium phosphate with the mass concentration of 0.5 to 0.6 percent, millesimal polyoxyethylene octyl phenyl ether with volume concentration of 2.0 to 4.0 percent, millesimal concentrated nitric acid with volume concentration of 1.0 to 3.0, and the balance of ultrapure water. The invention also provides a method for detecting content of lead and cadmium elements in the whole blood by the matrix modifying reagent, which dilutes concentration of the whole blood to be between one eighth and one thirteenth of the original concentration by adopting the matrix modifying reagent, and adds the diluted blood to an atomic absorption spectrometer for detecting. The detection method can detect lead and cadmium elements in one time, and has small amount of blood sample, simple operation, and low requirement on environment and operators.
Owner:BEIJING BOHUI INNOVATION TECH

Method for continuously separating and preparing functional lactoprotein in raw and fresh milk

The invention discloses a method for continuously separating and preparing functional lactoprotein in raw and fresh milk. The method mainly comprises the following steps: step one, separating and recovering milk fat by adopting a centrifugal method; step two, separating casein by combining a chymosin precipitation method with an acid precipitation method; step three, centrifuging a solution to obtain a supernatant being whey protein, carrying out microfiltration sterilization, and recovering permeate liquid for later use; step three, recovering a lactoferrin crude product by adopting an isoelectric point method; step three, recycling trapped fluid by an ultrafiltration method to obtain a crude immunoglobulin product; step five, removing lactose components from the ultrafiltration permeateto obtain an alpha-lactalbumin crude product; and step six, carrying out chromatographic purification on the alpha-lactalbumin crude product to obtain high-purity protein. According to the invention,the casein is separated by adopting the chymosin precipitation method combined with the acid precipitation method, so that the whey protein yield is increased; the subsequent separation of three different functional lactoproteins is facilitated; the protein crude product and the high-purity protein can be respectively obtained; and the requirements of the food industry on different raw materials are met.
Owner:JILIN UNIV

Online device for rapidly detecting quality indicators of prepreg tape

The invention discloses an online device for rapidly detecting the quality indicators of a prepreg tape, and relates to a device for detecting the quality indicators of the prepreg tape. The invention is to solve the problem of time-consuming, energy-consuming and large reagent-consuming nature of the analysis results in the existing prepreg tape detection method. A first guide roll and a second guide roll are respectively fixed on a first bracket in a vertical manner; a third guide roll and the second guide roll are arranged vertically and fixedly connected with a support plate which is vertically fixed on the first bracket, a fourth guide roll and the third guide roll are arranged in a top and bottom staggered manner, a probe is arranged at one side of the prepreg tape to be tested, the head part of the probe is opposite to the prepreg tape to be tested, a reflecting plate is arranged at the other side of the prepreg tape to be tested and opposite to the probe, the input end of the probe is connected with a near infrared spectrometer through optical fiber, and the near infrared spectrometer is connected with a computer. The invention can acquire the quality information of the prepreg in a online real-time manner, rapidly reflects the changes of each quality indicator in the prepreg tape to be tested and data detection and production process are carried out synchronously, and the detection results are accurate.
Owner:HARBIN INST OF TECH

Method for mounting anti-waving spacers on 66-kilovolt power transmission hot-line

The invention relates to the field of hot-line jobs of power transmission lines, in particular to a method for mounting anti-waving spacers on a 66-kilovolt power transmission hot-line. The method is characterized in that an operator fixes one end of an anti-waving spacer on a lower lead of the power transmission line by means of equal potential working, and fixedly connects the other end of the anti-waving spacer with an intermediate lead by means of middle potential working. Compared with the prior art, the method has the advantages that the method is safer than a common hot-line working method, particularly middle lead equal potential working is substituted by middle lead middle potential working, hot-line working operators can be protected better, and the method is of significance to prevention of ice coverage and wind waving disasters and guaranteeing safe and stable running of the power transmission line; power outage time limit is freed, and operation is convenient and quick; and power outage mounting time can be shortened by 70%, power sale quantity of power supply enterprises is increased, power supply reliability is improved, service quality of the power supply enterprise is improved, and remarkable social benefits are obtained.
Owner:ANSHAN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER COMPANY +1

Overhead ground wire suspended cable clamp adjusting method and buffer device thereof

The invention relates to an overhead ground wire suspended cable clamp adjusting method and a buffer device thereof, belonging to the technical field of overhead transmission line maintenance. The technical scheme is that the device comprises a front clamp seat (1), a front end (2), an inner screw rod (3), a ratchet wrench (4), a middle screw rod (5), an outer screw rod (6), a rear end (7), a back clamp seat (8), a front clamping nail (9), a back clamping nail (10), a front clamping hollow groove (11), a front clamping bolt (12), a back clamping hollow groove (14) and a back clamping bolt (15). The device is used for correcting a suspended cable clamp and loosening a U-shaped clip nut after the overhead ground wire suspended cable clamp is tilted, and the sudden sliding of a ground wire to generate impact force is avoided. When the overhead ground wire suspended cable clamp is corrected by the device, the generation of the impact force by the sudden sliding of the ground wire and caused violent shaking of a tower are avoided, the maintenance safety is ensured, the cost is low, the manufacturing and making process is simple, the volume is small, the weight is light, the operation method is simple, the device is safe and reliable to use, the practicability is strong, and the method and the device have a broad market space.
Owner:STATE GRID CORP OF CHINA +1

Preparation method of cement product

The invention discloses a preparation method of a cement product. The preparation method comprises the following steps: (1) preparing raw materials for a cement product, mixing the raw materials with water, stirring the mixture, then adding the mixture into a die, and carrying out wet plate moulding; (2) placing the wet plate into a curing kiln to carry out first curing, and controlling the curing temperature in a range of 25 to 30 DEG C and the humidity more than 85%; (3) performing demoulding, after demoulding, placing the sheet into a curing kiln to carry out secondary curing, and controlling the curing temperature in a range of 25 to 30 DEG C and the humidity in a range of 70 to 85%; and (4) covering a film on the sheet in the outdoor and carrying out curing to obtain the finished product. The provided preparation method has the advantages that the quality of the prepared cement product is controllable, labor and time are saved, and the operation method is safe and reliable. The prepared cement product can be used as an exterior wall cladding of a building, has the advantages of low carbon, environment-friendliness, energy saving, deformation resistance, and recyclable property, and has the characteristics of quick moulding, short production period, good stability, fireproof property, corrosion resistant performance, and durability.
Owner:ZHUODA NEW MATERIALS TECH GRP WEIHAI CO LTD

Method and device for plants carbon isotope labelling

The invention discloses a method and device for marking plant carbon isotopes. The method comprises following steps: sowing seed in the cultivating disk which located in the soil; putting cultivating disk into air- tight box; adding sodium carbonate marked with carbon-14 or carbon- 13 under air- tight condition, carrying out reaction with hydrochloric acid in reaction tank to generate carbon dioxide for plant photosynthesis. The carbon dioxide in box is mixed with electrical fan, and light is replenished with daylight lamp, the temperature and humidity are reduced by using cooling tube, and water is added into cultivating disk with fluid infusion bottle. The plant marked with carbon- 13 or carbon- 14 is got after cultivation. The invention is characterized by simple and safe operation, prevention of carbon marked with carbon isotopes escape, increased utilization coefficient of carbon isotopes, suitability for carbon isotopes mark for various plants, especially for woody plant.
Owner:INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI

Method for detecting food pathogen by electrochemical luminescence gene sensor on basis of magnetic in-situ amplification

The invention discloses a method for detecting food pathogen by an electrochemical luminescence gene sensor on the basis of magnetic in-situ amplification. The method comprises the following steps: designing three PCR (Polymerase Chain Reaction) primers by using highly conserved DNA (deoxyribonucleic acid) sequence of food pathogen as a detection target segment; preparing a magnetic primer from the primer 1, preparing a TBR (tris (bipyridine) ruthenium) primer from the primer 2, and using the primer 3 as a common PCR primer, wherein when a target gene segment exists in the detection system, the magnetic primer can be amplified as the PCR process goes on, and the magnetic particles can directly have a TBR-modified double-chain nucleic acid product; when no target gene segment exists, the magnetic primer can not be amplified, and thus, no product with signal molecules can appear; and carrying out magnetic separation and in-situ electrochemical luminescence detection. The method can be used for quickly, sensitively, safely and specifically detecting the target gene segment, and is very suitable for popularization in the actual detection process.
Owner:SOUTH CHINA NORMAL UNIVERSITY

Method for adjusting three-dimensional photonic crystal band gap through lithiation method

The invention discloses a method for adjusting a three-dimensional photonic crystal band gap through a lithiation method. The method for adjusting the three-dimensional photonic crystal band gap through the lithiation method aims at solving the problems that an existing method for adjusting the three-dimensional photonic crystal band gap is narrow in adjusting range and low in precision. The method for adjusting the photonic crystal band gap includes the steps that copper foil is perpendicularly put into PS microsphere emulsion to be cultivated, and copper foil on which a PS colloid template grows is obtained; secondly, GeC14 is added to (EMIM)TF2N, and an electrolyte is obtained; thirdly, a three-electrode electrolytic cell is used, a potentiostatic method is used for electrodeposition of germanium, and a three-dimensional germanium film is obtained; and fourthly, the lithium embedding and lithium removing processes are conducted in a three-electrode system, and therefore the three-dimensional photonic crystal band gap is adjusted. By means of the method, the direction of voltage is controlled so that the germanium film with the three-dimensional photonic crystal structure is correspondingly subjected to the lithium embedding and removing processes, and due to the fact that volume expansion of Ge is large, the adjusting range of the method is very large.
Owner:HARBIN INST OF TECH

Whole blood matrix modifying reagent and method for detecting multielement content in whole blood thereof

The invention discloses a whole blood matrix modifying reagent. The modifying reagent comprises the following compositions: 3 to 7 mass millesimal lanthanum chloride, 0.5 to 1.5 volume millesimal polyoxyethylene octyl phenyl ether, 0.5 to 1.5 volume millesimal concentrated nitric acid, and the balance of ultrapure water. The invention also provides a method for simultaneously detecting multielement by the whole blood matrix modifying reagent, which dilutes concentration of the whole blood to be between one twenty-sixth and one thirty-fifth of the original concentration by adopting the whole blood matrix modifying reagent, and installs a multielement simultaneous measuring atomic absorption device for detecting after standing the whole blood. The method can simultaneously detect multiple trace elements in the whole blood, and has good environmental applicability, high measuring accuracy and simple operation.
Owner:BEIJING BOHUI INNOVATION TECH

Cold preventing and spleen invigorating paste

InactiveCN1129442CPrevent common diseasesSolve or reduce the difficulty of taking medicine and injectionsDigestive systemUnknown materialsDiseaseMyrrh
Catching cold and diarrhea are familiar and frequently encountered diseases with high incidence of disease particularly for children. It influences health and growth badly. Now, chese two diseases are so prevalent, since there is little drugs to prevent them. The invention provides a medicine for external application, in order to solve or reduce children suffering from being taken an injection or medicine and parent's annoyance caused by taking medicine for children. The drug is pasted to umbilici point on bellybutton, stimulating the point, provided with showing effect on preventing and curing cold and diarrhea. The prescription and preparing method are as following: the sticky active extract from water solution of red sage root 150-200, frankincense 100-140, myrrh 100-140, astragalus root 150-200 and Angelica 100-170 etc. is mixed with powders of clove 70-100, cinnamon 70-80, white peony root 200-400. Above admixture being mixed evenly, then made into ointment for use.
Owner:李春土

Method for clamping blocking disc on input shaft through grinding external diameter

The invention relates to a method for clamping a blocking disc on an input shaft through grinding the external diameter, which comprises the following steps: firstly putting workpieces on each shaft table, ensuring that the external diameter distance of each workpiece is not less than 0.5 mm away from each finish turning surface of each shaft table, and positioning the blocking disc by using the two ends of an inner hole. The method is characterized in that when being blocked, big holes are assembled on all the end surfaces of each workpiece by using screws and then are positioned through center holes for disc shifting; and all the parts of the external diameter are ground to reach the required specifications. During clamping, the method further comprises the step of reversely blunting an edge; and a fillet is R0.2-0.4, and a chamber is 0.1-0.3*45 degrees. The method has the beneficial effects of simplicity in operation, easiness in implementation, safety and higher accuracy, and is an ideal method with large market prospect.
Owner:ZHUANGHE TIANCHENG MACHINERY

A method and a buffer device for adjusting the suspension clamp of an overhead lightning protection line

The invention relates to a method for adjusting the suspension clamp of an overhead lightning protection line and a buffer device, and belongs to the technical field of maintenance of overhead transmission lines. Technical solution: including front deck (1), front end (2), inner screw (3), ratchet wrench (4), middle screw (5), outer screw (6), rear end ( 7), rear clamping seat (8), front clamping nail (9), rear clamping nail (10), front clamping empty slot (11), front clamping bolt (12), rear clamping empty slot (14) and rear Clamp bolt (15); used to adjust the suspension clamp to loosen the U-shaped clip nut after the suspension clamp of the overhead lightning conductor is deflected, so as to prevent the sudden sliding of the lightning conductor to generate impact force. When the invention adjusts the suspension clamp of the overhead lightning protection wire, it prevents the sudden sliding of the lightning protection wire to generate impact force, causing the tower to shake violently, ensures the safety of maintenance, low cost, simple processing and manufacturing process, small size, light weight, simple operation method and safe use. Reliable and practical.
Owner:STATE GRID CORP OF CHINA +1

Whole blood matrix modifying reagent and method for detecting multielement content in whole blood thereof

The invention discloses a whole blood matrix modifying reagent. The modifying reagent comprises the following compositions: 3 to 7 mass millesimal lanthanum chloride, 0.5 to 1.5 volume millesimal polyoxyethylene octyl phenyl ether, 0.5 to 1.5 volume millesimal concentrated nitric acid, and the balance of ultrapure water. The invention also provides a method for simultaneously detecting multielement by the whole blood matrix modifying reagent, which dilutes concentration of the whole blood to be between one twenty-sixth and one thirty-fifth of the original concentration by adopting the whole blood matrix modifying reagent, and installs a multielement simultaneous measuring atomic absorption device for detecting after standing the whole blood. The method can simultaneously detect multiple trace elements in the whole blood, and has good environmental applicability, high measuring accuracy and simple operation.
Owner:BEIJING BOHUI INNOVATION TECH

Method for detecting concentration of four acids in mixed acid liquor

The invention provides a method for detecting the concentration of four acids in mixed acid liquor. The method comprises the following steps of measuring the total acidity and the content of fluosilicic acid, measuring the content of hydrochloric acid: adding barium nitrate, precipitating fluosilicate and sulfate radicals in the solution, and titrating chloride ions by using silver nitrate to measure the content of hydrochloric acid, determining the content of hydrofluoric acid: adding active silicon dioxide, enabling the active silicon dioxide to react with the hydrofluoric acid in the solution to produce fluosilicic acid, then determining the content of the fluosilicic acid, and subtracting the content of the fluosilicic acid, which is determined for the first time, from the content of the fluosilicic acid to calculate the content of HF, and determining the content of sulfuric acid in the solution by subtracting the content of hydrofluoric acid, hydrochloric acid and fluosilicic acid from the total acid. The method disclosed by the invention can be used for detecting the acid liquor component formed by mixing four acids, is simple and safe to operate, and is suitable for industrial popularization and application.
Owner:应悦

Grounding wire device

The invention relates to a grounding wire device which comprises a grounding wire clamp, a grounding down lead, a grounding electrode and an electricity testing device. The grounding wire clamp is connected with one end of the grounding down lead, the other end of the grounding down lead is connected with the grounding electrode, the electricity testing device is installed at the top end of the grounding electrode, and the grounding wire clamp comprises a wire clamp body, a hook and a tripping mechanism. The wire clamp body comprises a fixed half clamp and a movable half clamp, the first end of the fixed half clamp is fixedly provided with a hook, the second end of the fixed half clamp is hinged with the first end of the movable half clamp, the hinging is that an I-shaped clamping groove is formed in the second end of the fixed half clamp, and the first end of the movable half clamp is hooked into the I-shaped clamping groove. A tripping mechanism is installed at the second end of the movable half clamp, and the movable half clamp is connected with the first end of the fixed half clamp through the tripping mechanism. According to the invention, maintenance constructors can stand on the ground to complete electricity testing and ground wire hanging and picking work, and the operation method is safer and more reliable.
Owner:STATE GRID TIANJIN ELECTRIC POWER +1

Online cleaning device and method for water vapor sampling system

The invention relates to an online cleaning device and method for a water vapor sampling system. The online cleaning device comprises an alkaline cleaning module and / or an acid cleaning module. The alkaline cleaning module comprises an alkaline cleaning tank for preparing an alkaline cleaning solution, an alkali cleaning input pipeline connecting a mother pipe which is to be sampled and provides acleaning water source and the alkaline cleaning tank, an alkali cleaning output pipeline connecting the alkali cleaning tank and a water vapor pipeline to be cleaned, an alkali cleaning input valve arranged on the alkali cleaning input pipeline, an alkali cleaning output valve arranged on the alkali cleaning output pipeline. The acid cleaning module comprises an acid cleaning tank for preparing an acid cleaning solution, an acid cleaning input pipeline connecting a mother pipe which is to be sampled and provides a cleaning water source and the acid cleaning tank, an acid cleaning output pipeline connecting the acid cleaning tank and a water vapor pipeline to be cleaned, an acid cleaning input valve arranged on the acid cleaning input pipeline, an acid cleaning output valve arranged on theacid cleaning output pipeline. The online cleaning device can perform online cleaning on the water vapor pipeline, saves labor and has simple operation, safety, reliability and good cleaning effect.
Owner:中电华创(苏州)电力技术研究有限公司 +2

Foreskin dilater

The invention discloses a foreskin dilater. The foreskin dilater includes a waist belt, an expansion needle and a drawstring, wherein the expansion needle includes a metal wire and hoses, the metal wire is bent so as to form a V shape or a U shape, and the metal wire includes a bent part and two needle-leg parts, and the tail end of each needle-leg part is of a water drop shape; the lengths of thetwo needle-leg parts are different, the needle-leg parts are sleeved by the hoses, and one end of the drawstring is connected to the bent part; and the other end of the drawstring is connected with the waist belt. The foreskin dilater has the advantages that the expansion needle is connected with the waist belt through the drawstring so that the expansion needle can be prevented from falling, andmoreover positions of the expansion needle can be changed through regular pulling of the drawstring, so that multiple-position expansion is achieved, the tension is increased, and the expansion effect is good; the whole dilater has light texture, a simple process and sustainable expansion, and children patients have no obvious pain, urination, bathing, dressing and other daily life of the children patients are not affected; and the operation method of the foreskin dilater is simple and safe, the foreskin dilater is worthy of clinical promotion, the degree of satisfaction of the children patients and family is increased, and the quality of medical care is increased.
Owner:崔玥

Buffering tray for solvent-free paper-plastic lamination or cigarette packet transferring technology and operation method

The invention relates to the field of solvent-free lamination curing, and provides a buffering tray for a solvent-free paper-plastic lamination or cigarette packet transferring technology and an operation method. The buffering tray for the solvent-free paper-plastic lamination or cigarette packet transferring technology comprises a conveying layer, a load bearing layer and a buffering layer whichare connected from bottom to top in sequence; the upper surface of the load bearing layer sinks from the two opposite side surface to the middle position, a symmetrical curved surface is formed, and the buffering layer is parallel to the curved surface; a coiled product is placed on the buffering layer, and the force bearing point of the buffering layer is higher than the lowest point of the buffering layer; and the buffering tray is stable, and production is convenient. The invention further provides the operation method utilizing the buffering tray. The operation method comprises the following steps that S1, a rolled-up solvent-free paper-plastic lamination semi-finished product is placed on the buffering tray; and S2, transport equipment is connected to the conveying layer of the buffering tray. The operation method is simple, convenient and safe. Through the buffering tray and the operation method, the building cost of production curing placement zones can be greatly reduced.
Owner:GUANGDONG XINRUI NEW MATERIAL TECH

Online device for rapidly detecting quality indicators of prepreg tape

The invention discloses an online device for rapidly detecting the quality indicators of a prepreg tape, and relates to a device for detecting the quality indicators of the prepreg tape. The invention is to solve the problem of time-consuming, energy-consuming and large reagent-consuming nature of the analysis results in the existing prepreg tape detection method. A first guide roll and a second guide roll are respectively fixed on a first bracket in a vertical manner; a third guide roll and the second guide roll are arranged vertically and fixedly connected with a support plate which is vertically fixed on the first bracket, a fourth guide roll and the third guide roll are arranged in a top and bottom staggered manner, a probe is arranged at one side of the prepreg tape to be tested, thehead part of the probe is opposite to the prepreg tape to be tested, a reflecting plate is arranged at the other side of the prepreg tape to be tested and opposite to the probe, the input end of the probe is connected with a near infrared spectrometer through optical fiber, and the near infrared spectrometer is connected with a computer. The invention can acquire the quality information of the prepreg in a online real-time manner, rapidly reflects the changes of each quality indicator in the prepreg tape to be tested and data detection and production process are carried out synchronously, andthe detection results are accurate.
Owner:HARBIN INST OF TECH

Stem cell preparation for beautifying and resisting aging as well as preparation method and application of stem cell preparation

The invention is applicable to the technical field of biology, and provides a stem cell preparation for beautifying and resisting aging as well as a preparation method and application of the stem cellpreparation. The stem cell preparation comprises a component A and a component B, wherein the component A comprises platelet concentration growth factors; the component B comprises umbilical cord mesenchymal stem cells, placenta polypeptide, serum and a hyaluronic acid solution; the mass of the placenta polypeptide is 8%-10% of that of the hyaluronic acid solution; and the mass of the serum is 20%-35% of that of the hyaluronic acid solution. The stem cell preparation provided by the invention has the advantages of easiness in angiogenesis and tissue regeneration after injection, high survivalrate of transplanted cells and the like, can eliminate facial wrinkles, improve skin texture and brighten skin color, and is good in repair effect and long in maintenance time.
Owner:西安九州再生医学集团有限公司

A method for continuous separation and preparation of functional milk protein in fresh milk

The invention discloses a method for continuously separating and preparing functional lactoprotein in raw and fresh milk. The method mainly comprises the following steps: step one, separating and recovering milk fat by adopting a centrifugal method; step two, separating casein by combining a chymosin precipitation method with an acid precipitation method; step three, centrifuging a solution to obtain a supernatant being whey protein, carrying out microfiltration sterilization, and recovering permeate liquid for later use; step three, recovering a lactoferrin crude product by adopting an isoelectric point method; step three, recycling trapped fluid by an ultrafiltration method to obtain a crude immunoglobulin product; step five, removing lactose components from the ultrafiltration permeateto obtain an alpha-lactalbumin crude product; and step six, carrying out chromatographic purification on the alpha-lactalbumin crude product to obtain high-purity protein. According to the invention,the casein is separated by adopting the chymosin precipitation method combined with the acid precipitation method, so that the whey protein yield is increased; the subsequent separation of three different functional lactoproteins is facilitated; the protein crude product and the high-purity protein can be respectively obtained; and the requirements of the food industry on different raw materials are met.
Owner:JILIN UNIV

A kind of method that utilizes oil shale ash to prepare porous material

The invention discloses a method for preparing porous materials using oil shale ash, which includes: adding dry oil shale ash to a sodium hydroxide solution, heating to 50-70°C, stirring for 4-6 hours, and then adjusting the temperature to 80-90°C, continue stirring for 6-8 hours to form an oil shale ash suspension; place the suspension in an ultrasonic grinder for 1-2 hours, and then separate the solid and liquid to obtain a liquid phase. Add hydrotalcite, continue stirring for 4 to 6 hours, age for 24 to 48 hours, and then filter and separate to obtain a solid phase. After washing and drying, the solid phase is calcined at 300 to 500°C for 3 to 5 hours, and cooled to room temperature. A porous material is obtained. The invention makes full use of waste resources, has rich sources of raw materials, simple and safe operating methods, and the prepared materials have a wide application range and can be used as catalyst carriers and adsorption materials.
Owner:浙江金峨生态建设有限公司

Electric high-voltage switchgear high-voltage handcart electric operating device

An electric operating device for a high-voltage handcart of an electric high-voltage switchgear, including a mechanical cart and an adjustable support balance frame, the mechanical cart and the adjustable support balance frame are connected by an adjustable screw; the bottom of the mechanical cart is equipped with a pulley and a power supply The adjustable supporting balance frame is provided with a motor, the output shaft of the motor is connected with the rotating shaft transmission rod, and the end of the rotating shaft transmission rod is provided with a replaceable slotted head. The operation method of the invention is simple and safe, the operation is convenient and convenient to move, and the speed is uniform when the electric operation handcart switch is performed, which meets the requirements of the switch manufacturer. When centralized overhaul test and new installation and commissioning of multiple high-voltage handcart switches, high-intensity continuous and frequent operations can be performed in a short period of time, with low loss, high economic benefits, safety, and labor-saving operators.
Owner:PUYANG POWER SUPPLY COMPANY STATE GRID HENAN ELECTRIC POWER +1
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