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33results about How to "Avoid Potential Contamination" patented technology

Surgical instrument with detachable tool assembly

A surgical instrument includes a detachable tool assembly. The assembly includes a connection rod and a tool, such as a pair of jaws or an electrode. The instrument also includes a shaft operatively connected to a handle movable between operating positions and an ejected position. A tubular housing encloses the shaft and a collet. The collet is attached to the rod and movable between the positions. The fingers of the collet are flared apart in the ejected position but collapse to capture the connection rod in the operating positions. A tongue-and-groove arrangement provides a secondary coupling between the assembly and the housing when the handle is in the operating positions.
Owner:LIVNEH STEVE

Device and method for preparing large-size high-quality graphene single crystal

The invention relates to a device and method for preparing a large-size high-quality graphene single crystal. The device comprises a shell and a top cover. The top cover is internally provided with a gas spray head with a gas distributing pipe so that inlet high-purity gas can enter a reaction cavity in an evenly-distributed mode. The reaction cavity is composed of sealed silica pipes, a graphite heating element connected between the two sealed silica pipes in an inserted mode and a graphite crucible placed in the graphite heating element. The graphite crucible is used for containing a SiC wafer substrate. A cooling water system and an intermediate frequency coil are arranged outside the graphite heating element. A gas outlet is formed in the bottom of the shell. The invention further provides the method for preparing the large-size high-quality graphene single crystal on the SiC substrate. By means of the device and method, the migration rate of the high-quality graphene crystal prepared on the SiC substrate is higher than that of graphene prepared through a SiC high-temperature pyrolysis method by 1-2 orders of magnitudes.
Owner:SHANDONG UNIV

Method for quickly producing bio-organic fertilizer by using tobacco stalks and bio-organic fertilizer

The invention discloses a method for quickly producing a bio-organic fertilizer by using tobacco stalks and the bio-organic fertilizer. The raw materials for producing the bio-organic fertilizer in the method comprise the following substances in percentage by weight: 30 to 70 percent of tobacco stalks subjected to steam explosion treatment, 20 to 50 percent of mixed accessories, 5 to 15 percent of conditioning agent and 1 to 5 percent of microbial flora; and the bio-organic fertilizer is prepared through an aerobic composting process, wherein the stacking C / N ratio is adjusted to be 25 to 35 / 1, the water content is adjusted to be 50 to 65 percent, the pH is controlled to be 5.0 to 8.5, the strip stamping height is 1.0 to 1.5 m, and the tobacco stalks are crushed, screened and packaged after reaching a maturity index. The method has the characteristics of fast treatment, high efficiency and fast maturity, and has an important practical significance for fully using wasted tobacco stalk resources, improving the ecological environment of tobacco planting areas and reducing environmental pollution. The bio-organic fertilizer has high organic content, has the effects of improving the soil structure and improving the soil fertility, and can be widely used for planting economic crops of tobaccos, vegetables and the like.
Owner:HENAN AGRICULTURAL UNIVERSITY

Method of zyme catalyzing cyclo-olefin oxidation

The invention relates to a method of enzyme catalyzing olefin expoxidation. In the aqueous solution, the bromine peroxidase is applied for biological catalyst and hydrogen peroxide or oxygen is taken as oxygen source to oxidate the olefin into expoxidation. Take the cyclohexen as example. The hydrogen peroxide is applied as the source. They react under the 20 DEG C. to 70 DEG C. for two to ten hours. The yield of epoxy cyclohexane to the hydrogen peroxide is more than 50 per cent and the selectivity of the epoxy cyclohexane is more than 85 per cent. After the reaction, the water phase is separated from the organic phase automatically, and the enzymes left in the water phase can be recycled. Boasting easy technical process, recycled enzymes and easy yield separation, the method is an environment-friendly green chemical process.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

One-pot synthesis method of ceftriaxone sodium

The invention relates to a one-pot synthesis method of ceftriaxone sodium. The adopted one-pot synthesis method comprises the following steps: directly adopting an organic solution of 7-ACT as the intermediate 7-ACT is not separated in a solid manner, adding an organic solvent B, an antioxidant and water into the organic solution of the 7-ACT, then, adding AE active ester, performing further reaction under the action of organic base, adding a salt forming agent for salt formation, performing standing, extraction, water phase decolorization and filtering, and adding water-soluble organic solvent C crystal, so as to obtain the ceftriaxone sodium. According to the method for synthesizing the ceftriaxone sodium, the whole-process non-artificial direct contact to materials can be realized, the whole-process whole-solvent flow-state closed operation can be implemented, the control on the interaction effect of personnel and materials during the production process is facilitated, the shortening of the production period is facilitated, the production operation is simplified, the discharge of waste liquid is reduced, the energy consumption during the intermediate drying process is reduced, and the effect of reducing the cost to a certain degree is achieved.
Owner:山东安弘制药有限公司

Stem cell freezing medium and stem cell freezing method

The invention relates to the field of biotechnology, and in particular relates to a stem cell freezing medium and a stem cell freezing method. The stem cell freezing medium consists of DMSO, hydroxyethyl starch and a serum-free medium. The stem cell freezing medium provided by the invention can be used for remarkably reducing injury of the freezing medium on cells, so as to significantly improve the survival rate of the stem cells; and by adopting the serum-free medium, potential pollution caused by serum is avoided.
Owner:GUANGZHOU SALIAI STEMCELL SCI & TECH CO LTD

Sorting device and intelligent control system used for bone-containing sliced fish

ActiveCN107096724AMeet the needs of full automationAvoid the possibility of incomplete detectionSortingX-rayEngineering
The invention relates to the technical field of food detection and discloses a sorting device used for bone-containing sliced fish. The sorting device includes a transmission device, and an X-ray detection apparatus and a removal device that are arranged on the transmission device. The transmission device is used for carrying and moving a plurality sheets of the sliced fish, which are uniformly and symmetrically placed on the transmission device. The X-ray detection apparatus is used for detecting the sliced fish to find out bone-containing sliced fish therefrom, and the removal device removes the bone-containing sliced fish according to detection results of the X-ray detection apparatus. The invention also discloses an intelligent control system for the bone-containing sliced fish. The sorting device has simple structure, can significantly reduce manpower cost and has excellent use effect.
Owner:SHANGHAI OCEAN UNIV +2

Method for preparing 3,4-dichloro bromobenzene

The invention belongs to the chemical engineering field, and particularly discloses a method for preparing 3,4-dichloro bromobenzene. The method comprises steps of adding reduced iron powder into the raw material o-dichlorobenzene, inletting bromine water under certain pressure and temperature, and carrying out bromination reaction in a bromination kettle; carrying out multistage crystallization on the crude bromized 3,4-dichloro bromobenzene through solution, so as to purify the 3,4-dichloro bromobenzene, wherein the crude bromized 3,4-dichloro bromobenzene is crystallized by at least one stage, generally by multiple stages, namely, from one stage to three stages, so that a complete cycle of crystallization and purification of the 3,4-dichloro bromobenzene product is formed. The method has the main beneficial effects that the product is not polluted by foreign solvents or other materials, for the byproduct 2,3- dichloro bromobenzene generated in preparation of 3,4-dichloro bromobenzene through o-dichlorobenzene is used as the solvent; particularly, reduction of the yield of 3,4-dichloro bromobenzene caused by intensified side reaction of the 2,3- dichloro bromobenzene due to rectification high temperature is avoided; the method has the characteristics of high yield of the product, high purity and high production efficiency.
Owner:福建桦智工程技术有限公司

Urine preservation solution, urine collection container, method and kit

The invention provides a urine preservation solution for obtaining epithelial cells from urine. The urine preservation solution comprises an acid-base balance buffer system, a plurality of ionic components, a plurality of amino acid components and an inhibitor of bacteria or fungi, and does not contain animal-derived components. The invention also provides a urine collection container. The urine collection container comprises a bottle body, a bottle cap and a rotating device, wherein the bottle body comprises a middle partition plate for dividing the bottle body into an upper sample bin and alower preservation solution bin, and the preservation solution bin is pre-filled with the urine preservation solution; the bottle cap is arranged at the top of the urine collection container; the rotating device is arranged to close or open a hole in the middle partition board to close or open communication between the sample bin and the preservation solution bin. The invention further provides amethod for collecting and storing urine for culturing epithelial cells and a corresponding kit. Accordingly, collection of urine samples is simplified, preservation time of the epithelial cells in urine is prolonged, and the epithelial cells are conveniently obtained from the urine.
Owner:FUWAI HOSPITAL CHINESE ACAD OF MEDICAL SCI & PEKING UNION MEDICAL COLLEGE

Extraction process of dihydromyricetin in ampelopsis grossedentata and preparation process of ampelopsis grossedentata functional beverage

The invention discloses an extraction process of dihydromyricetin in ampelopsis grossedentata and a preparation process of an ampelopsis grossedentata functional beverage. The extraction method comprises the steps of pretreatment, countercurrent extraction treatment, pretreatment of filter residues, extraction and combination of the filter residues, vacuum concentration of flavonoid extracts, crystallization and the like. According to the extraction method, the raw materials can be extracted sufficiently, the residual flavonoid substances in the filter residues can be extracted more thoroughly, efficient extraction of the flavonoid substances is guaranteed, the extraction rate is high, and the flavonoid content is high. Meanwhile, the extraction method adopts a method of combining water extraction, ultrasonic extraction and high-pressure extraction, so that potential pollution caused by use of organic solvents such as ethanol is avoided. The method has the advantages of high dihydromyricetin extraction rate and high dihydromyricetin content.
Owner:武汉食味深山农业科技有限公司

Protein-free culture medium for culturing microencapsulated recombinant Chinese hamster ovary (CHO) cells and preparation method thereof

InactiveCN104212768AAvoid Potential ContaminationReduce the difficulty and cost of separation and purificationOn/in organic carrierForeign genetic material cellsHamsterTransferrin
The invention discloses a protein-free culture medium for culturing microencapsulated recombinant Chinese hamster ovary (CHO) cells and a preparation method thereof. By using DMEM (dulbecco's modified eagle medium) / F12 as a basal culture medium, micromolecule substance iron salt with definite component, zinc salt, sodium selenite, sodium acetate, glutamine and glucose are added according to the characteristics of the microencapsulated cell culture. The culture medium does not influence the stability of the microcapsules, does not have insulin or transferrin in the traditional serum-free culture medium, and lowers the downstream technique and cost; and the product expression level is approximate to the culture level of the expensive specific culture medium, but the price is only one-tenth of the expensive specific culture medium. Thus, the protein-free culture medium can be used for microencapsulated recombinant CHO cells culture and protein expression, and greatly lowers the culture cost.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Chemical laboratory waste incineration treatment system

The invention relates to a chemical laboratory waste incineration treatment system. The chemical laboratory waste incineration treatment system comprises a cleaning system, a rotary incineration system, a waste heat utilization system and a flue gas treatment system. According to the chemical laboratory waste incineration treatment system, not only can chemical laboratory waste be treated, but also generated wastewater can be cyclically treated, comprehensive treatment on the chemical laboratory waste is achieved, flue gas generated by incineration can be treated, generation of secondary pollution is prevented, and a good application prospect is achieved.
Owner:DONGGUAN UNIV OF TECH

Detection equipment and method for fish fillets containing bones

The invention relates to the technical field of food detection, and discloses detection equipment for fish fillets containing bones. The detection equipment comprises a conveyor, and an X-ray detection device arranged on the conveyor, wherein the conveyor is used for carrying and moving a plurality of fish fillets, and the X-ray detection device is used for detecting the plurality of fish fillets to find out the fish fillets containing bones, and displaying a detection result. The invention also disclosed a detection method for the fish fillets containing bones. By using the X-ray detection device, the detection equipment provided by the invention realizes real-time detection of a plurality of fish fillets in each big area on a conveyor belt; and the detection equipment is simple in structure, and can obviously reduce the labor cost and have a good using effect.
Owner:SHANGHAI OCEAN UNIV +2

Remote sensor damping and vibration-isolation device improved based on bi-pod supporting mode

ActiveCN107255131AVibration reduction effect is effectiveFast and efficient conversionShock absorbersVibration isolationRemote sensors
The invention provides a remote sensor damping and vibration-isolation device improved based on a bi-pod supporting mode, and relates to the technical field of optical remote sensing vibration isolation. The remote sensor damping and vibration-isolation device comprises lower adapting supports, vibration isolation metal outer rods, vibration isolation metal inner rods and an upper adapting support, wherein the lower adapting supports are located in the same plane and horizontally fixed at the lower end of the remote sensor damping and vibration-isolation device; one end of each vibration isolation metal outer rod is fixedly connected with the corresponding lower adapting support, and the vibration isolation metal inner rods are fixedly mounted in the vibration isolation metal outer rods and extend out of the upper end faces, in the axial direction, of the vibration isolation metal outer rods; the ends, extending out of the vibration isolation metal outer rods, of the vibration isolation metal inner rods are fixedly connected; and the upper adapting support is fixedly mounted at the joint of the vibration isolation metal inner rods. The remote sensor damping and vibration-isolation device is high in vibration reduction efficiency and few in consumed system resource, functional separation of a rigid supporting structure and a damping and vibration reduction structure is achieved, the technical problem that the rigidity of a vibration isolation system is hard to maintain effectively is solved, and the temperature maintaining purpose of a working section of the damping and vibration isolation system is achieved.
Owner:BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH

Sorting mechanism capable of distinguishing grades of tea fresh leaves

InactiveCN111842191AAvoid lossControl the amount of fresh tea leavesPre-extraction tea treatmentSortingAir compressionNeural network system
The invention discloses a sorting mechanism capable of distinguishing the grades of tea fresh leaves. The sorting mechanism comprises a sorting box and a feed mechanism; the sorting box is arranged onone side of the feed mechanism and comprises a box body rack, a vibrating feeding mechanism, a first sorting mechanism, a second sorting mechanism, a signal processor and a sensing device; the firstsorting mechanism comprises an infrared spectrum scanning device; the infrared spectrum scanning device is arranged below a first sliding chute; the light projection direction of the infrared spectrumscanning device is perpendicular to the sliding rail of the first sliding chute; an air compressor and an air-jet device are arranged below the infrared spectrum scanning device; the air-jet device communicates with the air compressor; and the air-jet device and the infrared spectrum scanning device are electrically connected with the sensing device. According to the existing near infrared spectrum special waveband of the fresh leaves, the tea fresh leaves with high grade are screened out first, then, a neural network is adopted to further analyze, screen and distinguish, and the sorting mechanism is fast, precise and effective in screening.
Owner:INST OF FRUIT & TEA HUBEI ACAD OF AGRI SCI

Mini-Severing And Back-Off Tool With Pressure Balanced Explosives

A “mini-severing and back-off” tool includes a tubular magazine for a column of explosive pellets that are sized in diameter to provide a predetermined weight of explosive per unit column length. The tubular wall is vented at prescribed intervals for fluid pressure equalization between the internal bore of the tubular and the fluid pressure around the outside of the tubular. A fluid barrier is positioned between one end of the explosive pellet tubular and a detonator or an explosive booster provided to detonate the explosive pellet tubular. The explosive pellet tubular is positioned within the flow bore of a pipe string and adjacent to an intended pipe joint, and the explosive pellet tubular is detonated simultaneously with an application of torque on the pipe string, wherein the torque is applied in the thread release direction to disassemble the intended pipe joint.
Owner:W T BELL INT INC

Ultrahigh molecular weight polyethylene filter containing activated carbon

The invention discloses an ultrahigh molecular weight polyethylene filter containing activated carbon. The ultra-high molecular weight polyethylene filter comprises a pipetting suction head and a filter element, the outer diameter of the filter element is matched with the inner diameter of the pipetting suction head, and the filter element is embedded and fixed in the middle of a pipe section of the pipetting suction head. The filter not only is simple in structure, reasonable in design and convenient to operate, but also has hydrophobicity while ensuring that air in the pipetting suction head passes through, so that potential pollution of a previous sample to a sample detection experiment is avoided, and the filter has a good application prospect.
Owner:上海金鑫生物科技有限公司

An improved damping and vibration isolation device for remote sensors based on bi-pod support

ActiveCN107255131BVibration reduction effect is effectiveFast and efficient conversionShock absorbersVibration isolationRemote sensors
The invention provides a remote sensor damping and vibration-isolation device improved based on a bi-pod supporting mode, and relates to the technical field of optical remote sensing vibration isolation. The remote sensor damping and vibration-isolation device comprises lower adapting supports, vibration isolation metal outer rods, vibration isolation metal inner rods and an upper adapting support, wherein the lower adapting supports are located in the same plane and horizontally fixed at the lower end of the remote sensor damping and vibration-isolation device; one end of each vibration isolation metal outer rod is fixedly connected with the corresponding lower adapting support, and the vibration isolation metal inner rods are fixedly mounted in the vibration isolation metal outer rods and extend out of the upper end faces, in the axial direction, of the vibration isolation metal outer rods; the ends, extending out of the vibration isolation metal outer rods, of the vibration isolation metal inner rods are fixedly connected; and the upper adapting support is fixedly mounted at the joint of the vibration isolation metal inner rods. The remote sensor damping and vibration-isolation device is high in vibration reduction efficiency and few in consumed system resource, functional separation of a rigid supporting structure and a damping and vibration reduction structure is achieved, the technical problem that the rigidity of a vibration isolation system is hard to maintain effectively is solved, and the temperature maintaining purpose of a working section of the damping and vibration isolation system is achieved.
Owner:BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH

A kind of preparation method of 3,4-dichlorobromobenzene

The invention belongs to the chemical engineering field, and particularly discloses a method for preparing 3,4-dichloro bromobenzene. The method comprises steps of adding reduced iron powder into the raw material o-dichlorobenzene, inletting bromine water under certain pressure and temperature, and carrying out bromination reaction in a bromination kettle; carrying out multistage crystallization on the crude bromized 3,4-dichloro bromobenzene through solution, so as to purify the 3,4-dichloro bromobenzene, wherein the crude bromized 3,4-dichloro bromobenzene is crystallized by at least one stage, generally by multiple stages, namely, from one stage to three stages, so that a complete cycle of crystallization and purification of the 3,4-dichloro bromobenzene product is formed. The method has the main beneficial effects that the product is not polluted by foreign solvents or other materials, for the byproduct 2,3- dichloro bromobenzene generated in preparation of 3,4-dichloro bromobenzene through o-dichlorobenzene is used as the solvent; particularly, reduction of the yield of 3,4-dichloro bromobenzene caused by intensified side reaction of the 2,3- dichloro bromobenzene due to rectification high temperature is avoided; the method has the characteristics of high yield of the product, high purity and high production efficiency.
Owner:福建桦智工程技术有限公司

Novel small door transmission mechanism

The invention discloses a novel small door transmission mechanism. The novel small door transmission mechanism is mounted on a decoration plate, the decoration plate is provided with an opening, and the opening of the decoration plate is provided with a small door. The novel small door transmission mechanism comprises a first lifting lug, a second lifting lug, two lifting lug mounting seats, a transmission shaft, a dustproof bin and a motor and is characterized in that the two lifting lug mounting seats are mounted on the decoration plate; one end of the first lifting lug is mounted on one lifting lug mounting seat, and the other end thereof is mounted on one lateral side of the small door; one end of the second lifting lug is mounted on the other lifting lug mounting seat, and the other end of thereof is mounted on the other lateral side of the small door; the dustproof bin is mounted on the decoration plate; the motor is mounted on the decoration plate, and the output shaft of the motor is located in the dustproof bin; one end of the transmission shaft is connected with one end of the second lifting lug, and the other end thereof is mounted in the dustproof bin and connected withthe output shaft of the motor. The novel small door transmission mechanism is simple and compact in structure, low in production difficulty, low in cost and capable of solving the potential pollutionproblem of drugs.
Owner:上海东富龙制药设备制造有限公司

Method for quickly producing bio-organic fertilizer by using tobacco stalks and bio-organic fertilizer

The invention discloses a method for quickly producing a bio-organic fertilizer by using tobacco stalks and the bio-organic fertilizer. The raw materials for producing the bio-organic fertilizer in the method comprise the following substances in percentage by weight: 30 to 70 percent of tobacco stalks subjected to steam explosion treatment, 20 to 50 percent of mixed accessories, 5 to 15 percent of conditioning agent and 1 to 5 percent of microbial flora; and the bio-organic fertilizer is prepared through an aerobic composting process, wherein the stacking C / N ratio is adjusted to be 25 to 35 / 1, the water content is adjusted to be 50 to 65 percent, the pH is controlled to be 5.0 to 8.5, the strip stamping height is 1.0 to 1.5 m, and the tobacco stalks are crushed, screened and packaged after reaching a maturity index. The method has the characteristics of fast treatment, high efficiency and fast maturity, and has an important practical significance for fully using wasted tobacco stalk resources, improving the ecological environment of tobacco planting areas and reducing environmental pollution. The bio-organic fertilizer has high organic content, has the effects of improving the soil structure and improving the soil fertility, and can be widely used for planting economic crops of tobaccos, vegetables and the like.
Owner:HENAN AGRICULTURAL UNIVERSITY

Partition board composition raw materials based on desulfurized gypsum and preparation method

The invention relates to a partition board composition raw material based on desulfurized gypsum and a preparation method, the partition board composition raw material comprises dry desulfurized gypsum as a main material I, fly ash as a main material II and a reinforcing auxiliary material as a main material III, through the dry desulfurized gypsum and the fly ash, raw material setting of the partition board is realized, and through the reinforcing auxiliary material, the partition board is prepared. The partition board is reinforced, so that consumption treatment of the desulfurized gypsum is realized, and the environment is protected.
Owner:广州龙伟科技有限公司

medicine press

The invention discloses a medicine press, which comprises a base, a fixed baffle, a movable press, a connecting rod and a handle; one end of the base is provided with a fixed baffle, the connecting rod, the fixed baffle, and the handle And the movable pressure plate is connected by a pin shaft, so that the handle can rotate up and down through the support of the connecting rod and the two wings of the fixed baffle, and through the connection transmission of the connecting rod, the movable pressure plate is driven around the connecting shaft at the bottom of the two wings of the fixed baffle to face the “V” on the plane of the fixed baffle. ” type rotation movement, and then realize the functional movement of crushing the tablet between the fixed baffle plate and the movable platen. The medicine pressing device of the present invention has the advantages of safety, labor saving, high efficiency, easy processing, low cost, easy maintenance and cleaning, and effective prevention of cross-contamination.
Owner:贺 光

Method and system for secondary nucleation and reuse of calcified anaerobic granular sludge

The invention discloses a method for secondary nucleation and reuse of calcified anaerobic granular sludge, comprising: (1) collecting the calcified anaerobic granular sludge in a bioreactor, squeezing or crushing it; (2) The broken calcified anaerobic granular sludge is screened to obtain calcified anaerobic granular sludge debris within a certain range of particle size; (3) the obtained debris is mixed with the bioreactor inlet and outlet water and normal sludge for culture for a certain period of time; (4) return the mixed cultured sludge to the bioreactor to promote secondary nucleation and accelerate sludge granulation. The invention is easy to operate, has no special requirements on external conditions, helps to maintain high biomass and biological metabolic activity in the biological treatment system, improves process stability, and provides protection for avoiding external environmental pollution from calcified sludge and its adherent substances. It is a reference and has significant application value.
Owner:SOUTH CHINA NORMAL UNIVERSITY
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