Process of extracting soluble polysaccharide from fragile blueberry leaf

The process of extracting soluble polysaccharide from fragile blueberry leaf includes the following steps: 1. drying fragile blueberry leaf and crushing in a crusher; 2. leaching fragile blueberry leaf powder in hot distilled water, cooling and filtering to obtain filtrate; 3. centrifuging the filtrate to obtain liquid phase and precipitate; 4. washing the liquid phase through mixing with 80 % concentration alcohol solution and centrifuging to obtain fragile blueberry polysaccharide; 5. washing the liquid phase through mixing with 80 % concentration alcohol solution and centrifuging to obtainfragile blueberry polysaccharide repeatedly for 1-3 times; and 6. vacuum drying the collected fragile blueberry polysaccharide. The present invention has simple technological process and high extracting rate.

Plantar pressure sensor for correcting frequency influence

The utility model discloses a plantar pressure sensor capable of correcting frequency influence. The device comprises a signal acquisition part and a rear-end circuit, wherein the signal output end ofthe signal acquisition part is connected with the signal input end of the rear-end circuit, the signal acquisition part comprises a frequency acquisition unit and at least one pressure acquisition unit, and each pressure acquisition unit comprises a first device protection layer, a first electrode, a piezoelectric film, a ground electrode and a second device protection layer which are sequentially arranged from top to bottom. According to the utility model, not only can the plantar pressure be measured during walking, but also the corresponding frequency can be measured, the piezoelectric constant change caused by the frequency change can be corrected, and richer, more comprehensive and more accurate data can be provided for the measurement of the plantar pressure. The utility model is suitable ...

Fusion cage push-out test device and test method

The invention provides a fusion cage push-out testing device and a testing method, and belongs to the technical field of medical instrument testing, the testing device and the testing method are included, a fusion cage needing to be measured is fixed through the testing device, and then a universal material testing machine applies a load to push out the fusion cage. According to the method, the push-out force of the fusion cage under different conditions can be tested, mechanical data and displacement data are automatically obtained through a universal material testing machine sensor, a displacement-load relation graph is obtained, and therefore measurement of the push-out force of the fusion cage is achieved.

Work piece discernment pusher

The utility model provides a pair of work piece discernment pusher, including propelling movement subassembly, work piece discernment with be used for transporting the conveyer belt of work piece, thepropelling movement subassembly includes the crank, is the connecting rod of V -arrangement, push -and -pull rod, rocker, frame and driving motor. Articulate one end is connected through the pivot ofhinge with driving motor, and crank, connecting rod and push -and -pull rod loop through the hinge and be connected, the tip of push -and -pull rod articulates has the slider, and the slider still sets up on the guide rail that the level set up. The lower extreme of rocker passes through the hinge to be fixed in the frame, and the upper end of rocker still is connected with the connecting rod middle part through the hinge. Work piece discernment piece is connected with the controller, and the controller still is connected with driving motor. Above -mentioned work piece discernment pusher hassolved ...

Molybdenum-rhenium alloy bone fracture plate system with growth stimulation function

The invention provides a molybdenum-rhenium alloy bone fracture plate system with a growth stimulation function, which belongs to the technical field of trauma surgical instruments and comprises a bone fracture plate body, a bone growth stimulation mechanism, a miniature self-adaptive lifting mechanism, a control module and a power module. The bone growth stimulation mechanism is arranged on the side, facing the bone surface, of the bone fracture plate body through the micro self-adaptive lifting mechanism, and the pressure value between the bone growth stimulation mechanism and the bone surface is controlled by the control module to be automatically adjusted, so that an electrode unit of the bone growth stimulation mechanism can be stably attached to the wound surface under the condition that blood supply is not affected. Direct current stimulation is continuously and stably carried out on a wounded bone surface, so that the activity of osteoblast proliferation is promoted, and bone healing ...

Amplifier circuit, amplifier and electronic equipment

The invention provides an amplifier circuit, an amplifier and electronic equipment, the amplifier circuit comprises an amplifying circuit, a matching circuit, an isolating circuit and a first inductor, the output end of the amplifying circuit is connected with the isolating circuit and the matching circuit; wherein the matching circuit and the isolating circuit are connected in parallel, and are respectively grounded through the first inductor; the first inductor multiplexes the matching circuit and the isolating circuit to form a first filter circuit, and the first filter circuit is used for filtering signals output by the output end of the amplifying circuit.

Preparation method of atomically active sites catalyst supported by integral nitrogen-doped porous carbon for catalyzing VOCs degradation at room temperature

Abstract The present invention discloses a preparation method of atomically active sites catalyst, which uses transition metal as active sites. The catalyst takes the macroscopically formed integral nitrogen-doped porous carbon as the support, which is a three-dimensional porous carbon material. It not only shows the advantages of good shape plasticity and high mechanical strength on macroscopic view, but also can solve the problems of pressure drop in catalyst bed, transportation and storage in the field of industrial catalysis. Furthermore, its large specific surface area and pore volume at the microscopic level, and the interconnected meso-micropore hierarchical structure, lead to a good combination of macroscopic and microscopic level. The integral nitrogen-doped porous carbon is used to support transition metal atoms, which can avoid the aggregation of metal atoms, dispersing metal atoms at the atomic level, thus constructing an atomically active sites catalyst with controllable shape ...

Method for extracting composite polypeptide liquid from mackerel bone

The invention discloses a method for extracting compound polypeptide liquid from a fish bone of mackerel. The method comprises the following steps that: the fish bone of mackerel is cleaned, ground and soaked in deionized water; the deionized water is removed by filtering; in the weight ratio of the fish bone to water being 1:5 to 1:10, the fish bone is added with the water, the enzyme is added according to the 1 to 5 percent of the weight of the fish bone and the weight ratio of the animal albumen hydrolytic enzyme to the neutral proteinase being 3:1 to 1:3, the pH value is adjusted to be between 5.5 and 8.5, and the mixed solution is subjected to enzymolysis at a temperature of between 45 and 70 DEG C; the enzymolysis liquid is heated at a temperature of between 90 and 100 DEG C for deactivating the enzyme; and the enzymolysis liquid is filtered by linen, the obtained filtrate is centrifuged for 10 to 15min under a rotation speed of between 2,000 and 4,000rpm to obtain supernatant, and ...

Handheld spinal operation system with navigation and automatic puncture functions

The invention discloses a handheld spinal operation system with navigation and automatic puncture functions, and belongs to the technical field of medical instruments, the system comprises an automatic puncture device and a mobile navigation device mounted on the automatic puncture device; when a user punctures and punches a pedicle screw channel, the user can observe the screen of the mobile navigation equipment in real time, the actual angle and position of the mobile navigation equipment, the expected puncture angle and position and the deviation between the two angles and positions can be displayed in the screen, and the two angles and positions are consistent through manual adjustment. And the automatic puncture equipment is used for punching a pedicle screw channel. According to the spinal operation system, the pedicle screw path which is high in precision and small in deviation from expected planning is obtained for the spinal operation through a simple and convenient means, the ...

Breeding and cultivation method of sweet-waxy corn hybrid

The invention discloses a breeding method of a sweet-waxy corn hybrid. Belongs to the technical field of corn seed breeding. According to the method, a high-combining-ability homozygous excellent waxy corn inbred line N310 which is subjected to continuous multi-generation selfing, screening, identification and breeding for many years is used as a female parent, an excellent sweet-waxy double-hidden corn inbred line TN274 is used as a male parent, new variety breeding is performed, a breeding place with good terrain is selected for breeding in the variety breeding process, the purity of seeds is ensured through space and time isolation, and the breeding efficiency is improved. The sweet-waxy corn variety bred by the method is high in combining ability, short in growth period, high in yield, excellent in quality, good in tenderness, high in sugar content and moderate in plant height, and the vacancy of the excellent sweet-waxy corn variety is made up. The invention further provides a sweet-waxy ...

Novel self-binding and fixing bone fracture plate for chest rib fracture

The invention relates to the technical field of novel medical instruments, in particular to a novel self-binding and fixing bone fracture plate for chest rib fracture.The novel self-binding and fixing bone fracture plate comprises an upper fixing plate, a lower binding plate and locking screws, at least two sets of through holes are symmetrically formed in the long edge of the upper fixing plate, and at least two sets of fixing grooves are symmetrically formed in the two side faces of the long edge of the upper fixing plate; a notch is formed in the fixing groove, the lower binding plate is arranged in the fixing groove and comprises a deformation part and hook parts, a deformation space is formed in the middle of the deformation part, a threaded hole coaxial with the through hole is formed in the middle of the deformation part, and the hook parts are symmetrically fixed to the two sides of the deformation part; the locking screw downwards penetrates through the through hole to be in threaded ...

Photovoltaic solar strip and preparation method thereof

The invention discloses a photovoltaic solar strip and a preparation method thereof, and relates to a method for manufacturing a copper strip for a flat solar heat collecting plate core. An oxygen-free copper strip is characterized by comprising the following components in percentage by weight: more than or equal to 99.99 percent of copper, less than or equal to 0.0010 percent of oxygen, less than or equal to 0.0040 percent of iron and less than or equal to 0.0010 percent of phosphorus; and the tensile strength is more than or equal to 240MPa, and HV is less than or equal to 50. The preparation method sequentially comprises the following steps of: (1) ingot casting and uniform heating of an oxygen-free copper raw material; (2) hot rolling; (3) double-side milling; (4) rough rolling; (5) trimming; (6) medium rolling with a finishing mill; (7) intermediate annealing; (8) final rolling with the finishing mill; (9) annealing; and (10) shearing and packing. The requirements of high strength ...

Ganoderma lucidum spores polysaccharides preparing method

The invention discloses a ganoderma lucidum spores polysaccharides preparing method. According to the method, wall breaking and crushing are conducted on ganoderma spore, spore oil is extracted through supercritical CO2 fluid, then water extraction, membrane concentration and spray drying are conducted on the residues generated after oil extraction is conducted, and ganoderma lucidum spores polysaccharides is obtained. The method is easy and convenient to operate, the production cycle is short, the cost is low, energy is saved, and the environment is protected. The obtained ganoderma lucidum spores polysaccharides is spray drying powder, the power is even in color and granularity, and the ash content is low.

Low-cost flux-cored cutting wire for underwater wet-type arc cutting and preparation method thereof

The invention discloses a low-cost flux-cored cutting wire for underwater wet-type arc cutting and a preparation method thereof. The flux-cored cutting wire is composed of a flux core and an outer-layer steel belt and is characterized in that the flux core is composed of the following powders, by weight, 6-20% of sodium bicarbonate, 40-60% of limestone, 0.2-2% of potassium carbonate, 0.05-2.5% of rare-earth oxide and the balance being sodium percarbonate, and the total mass percent is 100%. The preparation method comprises the steps that the powders after being matched are mixed evenly; drying is conducted on the evenly mixed powders, and the drying temperature can not be above 50 DEG C; a forming machine is adopted for fabricating the outer-layer steel belt into a U type groove shape, meanwhile, the powders are filled into a U-shaped groove, an opening of the groove is closed, and the powder filling rate is controlled within 18-25%; finally, a wire drawing machine is adopted for conducting ...

Method for extracting composite polypeptide liquid from mackerel bone

The invention discloses a method for extracting compound polypeptide liquid from a fish bone of mackerel. The method comprises the following steps that: the fish bone of mackerel is cleaned, ground and soaked in deionized water; the deionized water is removed by filtering; in the weight ratio of the fish bone to water being 1:5 to 1:10, the fish bone is added with the water, the enzyme is added according to the 1 to 5 percent of the weight of the fish bone and the weight ratio of the animal albumen hydrolytic enzyme to the neutral proteinase being 3:1 to 1:3, the pH value is adjusted to be between 5.5 and 8.5, and the mixed solution is subjected to enzymolysis at a temperature of between 45 and 70 DEG C; the enzymolysis liquid is heated at a temperature of between 90 and 100 DEG C for deactivating the enzyme; and the enzymolysis liquid is filtered by linen, the obtained filtrate is centrifuged for 10 to 15min under a rotation speed of between 2,000 and 4,000rpm to obtain supernatant, and ...

Carbon dots synthesized by drug function retention strategy, and preparation method and application thereof

The invention belongs to the field of medicines, and relates to a carbon dot synthesized by a medicine function retention strategy, and a preparation method and application thereof. According to the carbon dots synthesized by the drug function retention strategy, hydroxyurea and o-phenylenediamine are used as precursors, and mannose is used for modification. The preparation method comprises the following steps: adding hydroxyurea and o-phenylenediamine into a solvent, carrying out ultrasonic dissolution, then carrying out a heating reaction, after the reaction is completed, carrying out filtration to obtain a p-CDs solution, carrying out washing and centrifugation to obtain a supernatant, and then carrying out rotary evaporation and drying to obtain a p-CDs solid; adding the mp-CDs and mannose into distilled water, performing ultrasonic dissolution, performing water bath reaction to obtain a mp-CDs solution, and filtering and drying to obtain the mp-CDs carbon dots. When the carbon dot ...

High-efficiency heat production flux-cored cutting wire for underwater wet-type arc cutting and preparation method thereof

The invention discloses a high-efficiency heat production flux-cored cutting wire for underwater wet-type arc cutting and a preparation method thereof. The flux-cored cutting wire is composed of a flux core and an outer-layer steel belt and is characterized in that the flux core is composed of the following powders, by weight, 4-7% of sodium bicarbonate, 10-18% of dolomite, 10-20% of aluminite powder, 0.05-1.5% of rare-earth oxide and the balance being sodium percarbonate, and the total mass percent is 100%. The preparation method comprises the steps that powders are weighed according to the proportion, the potassium perchlorate, the sodium bicarbonate and the dolomite are evenly mixed firstly, then the rare-earth oxide is added and evenly mixed with the former mixture, and finally the aluminite powder is added and evenly mixed with the mixture; drying is conducted on the evenly mixed powders, and the drying temperature can not be above 50 DEG C; a forming machine is adopted for fabricating ...

Method for extracting protein from yellow rice wine stillage

Optical line diameter measuring instrument and measuring method

The invention discloses an optical line diameter measuring instrument, and belongs to the technical field of medical instruments, the optical line diameter measuring instrument comprises a measuring instrument body, the measuring instrument body is provided with a measuring unit, a clamping unit and a control unit, the measuring unit comprises a measuring frame, and the measuring frame is provided with a first laser receiving sensor and a first laser emitting area which are arranged in the radial direction of a measured body; a second laser receiving sensor and a reflecting prism which are arranged in the other radial direction of the measured object are arranged on the measuring frame, a second laser emitting area is arranged on the measuring frame, and a laser generator is arranged in the second laser emitting area or the first laser emitting area; and a first linear module for controlling the laser generator to reciprocate between the first laser emission area and the second laser emission ...

Charge pump architecture with automatic clamping output end voltage protection and protection method thereof

The invention discloses a charge pump architecture with automatic clamping output end voltage protection and a protection method thereof.The protection method of the charge pump architecture with the automatic clamping output end voltage protection comprises the steps that S1, in an initial state, reference voltage Vref is higher than Vf1, so that an output signal of a voltage comparator U1 is 1, an output signal of a phase inverter U2 is 0, and the reference voltage Vref is lower than Vf1; a clock signal CLK is output through the OR gate U3; meanwhile, the reference voltage Vref is higher than Vf2, so that an output signal of the voltage comparator U4 is 1, an output signal of the phase inverter U5 is 0, and a clock signal CLK output by the OR gate U3 is output through the NOR gate U6. The invention discloses a charge pump architecture with automatic clamping output end voltage protection and a protection method of the charge pump architecture, and overcomes the defect that when a CHARGE ...

Application of modified polyvinylidene fluoride material in simultaneous adsorption of micro-plastics and perfluorinated compounds in water body

The invention discloses an application of a modified polyvinylidene fluoride material in simultaneous adsorption of micro-plastics and perfluorinated compounds in a water body, synchronous adsorption of the micro-plastics and perfluorinated compounds in the water body is completed by using the surface wettability and adhesive property of the modified polyvinylidene fluoride material, and the operation is simple, green and rapid. According to the modified polyvinylidene fluoride material, ionic liquid connected through chemical bonds is evenly distributed on a polymer material matrix through an electron beam radiation grafting chemical modification method, the grafted ionic liquid has good hydrophilicity and high surface energy, meanwhile, the surface energy of the polymer material is greatly improved through curing in the water vapor atmosphere, and the surface energy of the polymer material is greatly improved. The surface of the material is endowed with a micro-nano graded coarse structure ...

Vertebral plate fixing plate dynamic bending fatigue test device and test method

The invention relates to the technical field of medical instruments, in particular to a vertebral plate fixing plate dynamic bending fatigue testing device and method.The vertebral plate fixing plate dynamic bending fatigue testing device comprises a base, a support testing block, a connecting block and a fatigue testing machine, a sliding groove used for moving of the support testing block is formed in the base, and a locking bolt for fixing the support testing block is arranged on the base; the support test blocks are symmetrically arranged in the sliding grooves in a sliding mode, an interval groove is formed between the support test blocks, two vertebral plate fixing plates are symmetrically arranged in the interval groove, the lower ends of the vertebral plate fixing plates are fixed to the upper ends of the support test blocks, and grooves are formed in the vertebral plate fixing plates; the connecting block is attached in the groove, the upper end face of the connecting block is ...

Modified polyvinylidene fluoride coating material with graded roughness on surface and preparation method thereof

The invention discloses a modified polyvinylidene fluoride coating material with graded rough surface and a preparation method thereof. A micro-nano two-stage coarse structure is constructed on the surface of the coating material, and the coating material has adjustable wettability. According to the method disclosed by the invention, graded roughness is constructed on the surface of the coating through curing in a water vapor atmosphere, and the surface is endowed with adjustable wettability, so that the coating has relatively high bonding strength. The prepared coating material has good thermal, mechanical and chemical stability and high surface energy and bonding strength, and is expected to provide a certain thought for deep development and application of fluorocarbon coatings.

Crane sling registration system based on image perception guiding technology

The invention provides a crane sling registration system based on an image perception guiding technology, which comprises a ground rail, a rigid support leg, a flexible leg, a main beam, an electrical control system, a cart running mechanism and a visual identification system, an auxiliary sling and an upper trolley sling are arranged on an upper trolley, a lower trolley sling is arranged on a lower trolley, a high-definition camera A1 is arranged at the A end of the main beam, and a high-definition camera A2 is arranged at the B end of the main beam. A high-definition camera A2 is installed at the end B of the main beam, an upper trolley is provided with an upper-vehicle high-definition camera B1, a lower trolley is provided with a lower-vehicle high-definition camera B2, and the visual recognition system is used for receiving image information of the cameras, collecting data of a hoisting target in a unit time sequence and feeding back the distance between each camera and the end of the ...

Intelligent spinal fusion test model sensing system and test method

The invention relates to the field of medical instruments, in particular to an intelligent spinal fusion test mold sensing system and a test method.The intelligent spinal fusion test mold sensing system comprises a test mold assembly which comprises a test mold head and a handle; the pressure sensor modules are adhered to the upper surface and the lower surface of the test die head; the control module comprises a signal processing module and a display screen, the signal processing module is in electric signal connection with the two groups of pressure sensor modules and the display screen, and the display screen is used for displaying pressure values borne by the pressure sensor modules. Force values borne by the upper surface and the lower surface of the test mold are displayed on the display screen after being processed by the signal processing module, certain guidance suggestions are given to a doctor according to the force values measured by the sensing system, the doctor can conveniently ...

Outdoor high-voltage area inspection system and method

The outdoor high-voltage area inspection system comprises a host system and an inspection terminal, the inspection terminal comprises a main control unit, an input unit, an output unit, a bus module and a power supply unit, and the power supply unit is used for providing working power for the main control unit, the input unit, the output unit and the bus module. The input unit, the output unit and the bus module are connected with the main control unit through ports, and the inspection terminal is connected with the host system through the communication module. The system has the advantages that the dispatching room of the substation and each jurisdiction substation are provided with the inspection terminal and the host system, so that the inspection operation content is timely and accurately transmitted to the inspection operation personnel; the inspection terminal is provided with a fingerprint module, a camera shooting module and a GPS module, and is used for detecting whether an inspection ...

Method of extracting soluble polysaccharide in bitter vegetable

Preparation method and application of astaxanthin encapsulated by soybean protein nanofibers

The invention discloses a preparation method and application of astaxanthin encapsulated by soybean protein nanofibers, and belongs to the field of nutrient substance delivery protection. According to the protein/astaxanthin compound and the preparation method thereof, the astaxanthin loading capacity of the protein/astaxanthin compound is enhanced through the fibrillated soybean protein isolate, the protein/astaxanthin compound is obtained through an emulsification-evaporation method and hydrophobic interaction and hydrogen bonds between the protein and the astaxanthin, and the problems that the astaxanthin is poor in water solubility, unstable in chemical property and low in bioavailability are solved. Meanwhile, the preparation method is simple, and the material source is wide.

Door opening supporting system for squat silo slip-form construction and construction method

The invention provides a door opening supporting system for squat silo slip form construction and a construction method.The door opening supporting system comprises a slip form lifting and reinforcing system and a concrete intercepting system, the slip form lifting and reinforcing system comprises a slip form lifting frame mechanism and a supporting and reinforcing mechanism, and the slip form lifting frame mechanism comprises a jack and a supporting rod; the supporting and reinforcing mechanism is arranged corresponding to the supporting rod and is connected and reinforced with the supporting rod; the concrete intercepting system comprises steel bar truss structures symmetrically arranged on the two sides of the door opening. According to the sliding formwork, normal construction of the sliding formwork is not affected, meanwhile, cost is reduced, structural stability is improved, and structural safety is ensured.

Ship generator set grid-connected phase difference detection method

The invention discloses a ship generator set grid-connected phase difference detection method. The ship generator set grid-connected phase difference detection method comprises the steps of respectively transmitting an exclusive-or square signal to two detection channels of the same timer, wherein one detection channel performs rising edge detection on the exclusive-or square signal to record a rising edge detection moment, and the other detection channel performs falling edge detection on the exclusive-or square signal and records a falling edge detection moment; using the falling edge detection moment to subtract the rising edge detection moment to obtain a calculation result; confirming the grid-connected phase difference if the calculation result is larger than 0, performing complementing calculation on the calculation result according to an exclusive-or wave formation principle and confirming that a calculated value is a grid-connected phase difference value if the calculation result ...

Text classification model attack method and device, electronic equipment and storage medium

The invention provides an attack method and device of a text classification model, electronic equipment and a storage medium, and relates to the technical field of artificial intelligence security, the method comprises the following steps: obtaining a to-be-classified text and a pre-trained target generator, the target generator being obtained by training an original generator based on first training data, the original generator is constructed based on a mask language model; inputting the to-be-classified text into the target generator to obtain a target wrongly classified text corresponding to the to-be-classified text; and outputting the target misclassification text to a to-be-attacked classification model to obtain a target misclassification result corresponding to the to-be-classified text, so as to solve the technical problems of low attack efficiency on the text classification model and low semantic quality of the generated misclassification text in the prior art.

Book classification method, apparatus and device, and storage medium

The invention discloses a book classification method, device and equipment and a storage medium, and the method comprises the steps: determining a first similarity between a to-be-screened book and a reference book according to the image features of the to-be-screened book and the image features of the reference book; according to the first similarity, determining a similar target book of the reference book in the to-be-screened books; and according to the classification category of the reference book, updating the classification category of the similar target book. The accuracy of book classification is improved.

Method for extracting perfluoroetane sulfonic acid and perfluorooctanoic acid ammonium from perfluorochemical-containing solid

The invention discloses a method for extracting perfluorooctane sulfonates and perfluoroheptanecarboxylic ammonium from a solid containg perfluoro compounds. The method comprises the following steps: the solid containing perfluoro compounds are washed completely and dried, added with methanol solution, added with alkenyl sodium sulfonate, heated for circumfluence, and filtered after being coolingdown to obtain a liquid phase I and a remaining material I after primary treatment; the liquid phase I undergoes a isochoric process and then centrifuge to obtain a liquid phase II and a deposit Iwhich is washed and added to the remaining material I after the first treatment, then a plurality of extraction is performed; the finally obtained solution is condensed through rotation evaporation condensation and purified through GPC condensation, and then tested through HPLC/MS/MS ; after a judgment is made that no PFOS and PFOA are tested, all extracts obtained undergo a mixed purifying condensation ...

Device and method for testing pulling-out force of screw cap of spinal screw

The invention relates to the field of medical instruments, in particular to a spinal screw cap pulling-out force testing device and method.The testing device comprises a buckle mechanism and a clamping mechanism, the buckle mechanism comprises a buckle body and a first connecting part, the first connecting part is fixed to the upper end of the buckle body, a first pin shaft hole is formed in the first connecting part, and a second pin shaft hole is formed in the second connecting part; a screw clamping opening for supporting a screw cap is formed in the buckle body, the clamping mechanism is arranged below the buckle mechanism, the clamping mechanism comprises a clamping body and a second connecting part, a clamping opening for clamping a screw body is formed in the upper end of the clamping body, a second pin shaft hole is formed in the second connecting part, and a first pin shaft is arranged in the second pin shaft hole. The clamping opening and the screw clamping opening are coaxially ...

Adjustable micro-motion interbody fusion cage

The invention provides an adjustable micro-motion interbody fusion cage, and belongs to the technical field of medical materials, the adjustable micro-motion interbody fusion cage comprises a fusion cage body, and the fusion cage body comprises a first body and a second body; the first body and the second body are overlapped and connected into a whole through a micro-motion structure, and each of the first body and the second body comprises a first section and a second section which are hinged; vertical screw holes are formed in the first section and the second section; a screw is arranged in the third screw hole; the screw is driven by the driving mechanism to ascend or descend along the threaded hole to be implanted into the vertebral body. The fusion cage body provided by the invention is provided with a micro-motion structure, so that the upper and lower vertebral bodies have a certain range of motion, and the comfort of a patient can be improved; meanwhile, the screw is perpendicular ...

Method for extracting perfluoroetane sulfonic acid and perfluorooctanoic acid ammonium from perfluorochemical-containing solid

The invention discloses a method for extracting perfluorooctane sulfonates and perfluoroheptanecarboxylic ammonium from a solid containg perfluoro compounds. The method comprises the following steps: the solid containing perfluoro compounds are washed completely and dried, added with methanol solution, added with alkenyl sodium sulfonate, heated for circumfluence, and filtered after being cooling down to obtain a liquid phase I and a remaining material I after primary treatment; the liquid phase I undergoes a isochoric process and then centrifuge to obtain a liquid phase II and a deposit Iwhich is washed and added to the remaining material I after the first treatment, then a plurality of extraction is performed; the finally obtained solution is condensed through rotation evaporation condensation and purified through GPC condensation, and then tested through HPLC/MS/MS ; after a judgment is made that no PFOS and PFOA are tested, all extracts obtained undergo a mixed purifying condensation ...