76results about How to "Reduce the probability of contamination" patented technology

A process for extracting hemopoietic stem cells from the placenta of healthy puerperant to create hemopoistic stem cell bank features that the mechanical, enzyme digestive and monoclonal antibody-magnetic bead method is used to extract blood stem cells from placenta, and concentrate and purify them. Its advantages are high activity and high concentration.

The invention relates to an automatic medicine taking cabinet and a medicine taking method. The automatic medicine taking cabinet comprises a cabinet body, the cabinet body comprises a medicine placing rack, a front panel located in front of the medicine placing rack, a cabinet door located on the rear side of the medicine placing rack, a medicine taking mechanism and a control system. The invention further discloses the medicine taking method. According to the automatic medicine taking cabinet, a medicine taking trolley hopper of the medicine taking mechanism can reach the lower portions of medicine containing bins along medicine taking rail units, walk to the left side of the medicine taking rail units after taking medicines and pour the medicines into an adjacent medicine hopper, and then a medicine collecting trolley reaches the designated medicine outlet position through a lifting unit and a horizontal moving rail unit. By adopting the cooperation of conveyor belts and correlationsensors, the problems of a medicine feeding mode and counting are well solved, and when the medicines are placed, only the cabinet door needs to be opened, the medicines are pushed in from the back,the previous medicines are in the front, the current medicines are in the back, the operation is simple and convenient, and the situation that the previous medicines are out of date due to unreasonable medicine placement can be prevented.

The invention belongs to the technical field of biological detection, and particularly discloses a nucleic acid detector and a nucleic acid detection method. The nucleic acid detector comprises a mounting rack, a reagent plate, a cover plate assembly, a heat treatment unit, a liquid moving device, an oscillating unit and a magnetic attraction assembly, wherein a nucleic acid amplification tube, ahybridization tank, a reaction tube and a reagent tube for storing an extraction reagent are arranged on the reagent plate; the cover plate assembly can move towards or away from the nucleic acid amplification tube so as to close or open a tube opening of the nucleic acid amplification tube; the heat treatment unit is used for heating or cooling the liquid on the reagent plate; the liquid moving device is used for sucking and transferring the liquid on the reagent plate; the oscillating unit is used for driving the reagent plate to oscillate back and forth in a horizontal direction; and the magnetic attraction assembly is used for carrying out magnetic attraction and magnetic release on magnetic beads in a reaction liquid on the reagent plate. The nucleic acid detection method adopts the nucleic acid detector for nucleic acid detection. According to the nucleic acid detector and the nucleic acid detection method provided by the invention, the nucleic acid detection efficiency can be improved.

The invention relates to the technical field of planting of the Hypsizigus tessellatus, in particular to a planting method of the Hypsizigus tessellatus. Chinese medicine residues and edible fungus waste materials are combined for use to replace high-cost culture medium materials, such as corn starch, so that planting cost of the Hypsizigus tessellatus is greatly lowered; meanwhile, the Chinese medicine residues disposed as waste are comprehensively utilized, and environmental pollution is avoided. Planting process and planting technical parameters are controlled and adjusted, nutrient ingredients are allocated, and accordingly, the Hypsizigus tessellatus cultivated has white and thick mycelia and grows fast, chances of the Hypsizigus tessellatus being contaminated are slim, and fruiting bodies of the Hypsizigus tessellatus are large, white, tender and thick.

The invention provides a double-end glue dispensing device. The double-end glue dispensing device comprises a glue dispensing device body, the glue dispensing device body comprises a double-end glue dispensing mechanism, a shell for forming a device skeleton and an electronic control module for supplying power for the device, wherein the double-end glue dispensing mechanism comprises a clamping component, a glue dispensing component and an assembling component, the assembling component is used for conveying a carrier, the glue dispensing component moves to the assembling component and is usedfor performing glue spraying on a glue spraying area on the assembling component, the clamping component is used for grabbing a workpiece and carrying the workpiece to move to make the workpiece be placed on the carrier, so that assembly is realized. According to the double-end glue dispensing device, the workpiece is grabbed and placed on the carrier through the clamping component, the glue dispensing component performs the glue spraying on the glue spraying area on the workpiece or the carrier to make the workpiece and the carrier be fixedly assembled into a whole, and meanwhile, the double-end glue dispensing device is simple in structure and convenient to maintain.

The invention discloses a non-scaling-powder pulse ultrasound low-temperature brazing method for copper-based materials. A to-be-welded assembly is composed of base metal and alloy brazing filler metal. The alloy brazing filler metal is formed by preparing at least two of SnAg, SnCu, SnIn or SnBi; pulse current is used for making an ultrasound tool head generate heat, the temperature of the ultrasound tool head is controlled to range from 200 DEG C to 400 DEG C, the brazing temperature ranges from 100 DEG C to 287 DEG C, and the welding face of the to-be-welded assembly is subjected to ultrasound brazing; and meanwhile, the ultrasonic action time ranges from 0.5 s to 6 s, and metallurgical bonding is formed by the welding base metal. According to the provided brazing method, the metallurgyreaction is generated between the base metal and the alloy brazing filler metal, metallurgical bonding is formed between the welding base metal and the alloy brazing filler metal, and the connectingstrength of an ultrasonic welding compression joint clamp is improved. On the basis of the forming principle, the invention further provides a non-scaling-powder pulse ultrasound low-temperature brazing method for a copper wire and a circuit copper base plate and a non-scaling-powder pulse ultrasound low-temperature brazing method for a copper wire and a copper terminal in a high-frequency data line interface.

The invention relates to a method and a loading plate for degumming cleaning a crystalline silicon solar cell silicon wafer. The method mainly comprises the following steps of: bonding silicon blocks onto the loading plate distributed with porous channels, cutting the silicon blocks on a multiline cutting machine, simultaneously cutting through the porous channels of the loading plate, then connecting the porous channels with a water pipe, introducing tap water, leading the water to flow down from cut gaps, and washing away mortar bonded in the silicon wafer. By the use of the method, not only can the water consumption be greatly reduced and can water be saved by 70%, but also the cleaning effect is good, the staining rate is reduced, the quality of a product is improved, the rate of A-grade products can be improved by 1.5-2%, the cleaning time is shortened, and the labor productivity is improved by 33%; and for the loading plate for cleaning, the structure is simple, the manufacturing cost is low, the use is convenient and the production cost and the manufacturing cost of the silicon wafer are reduced.

The invention discloses a liquid crystal display device and a preparation method thereof. The device comprises an upper substrate, a lower substrate corresponding to the upper substrate, a display area, a frame adhesive and a polymer ring, wherein the display area is arranged between the upper substrate and the lower substrate and filled with liquid crystal, and the frame adhesive is arranged on the outer edge of the liquid crystal display device. The polymer ring surrounds the display area, and the frame adhesive is arranged around the outer edge of the polymer ring; the upper end and the lower end of the polymer ring are connected with the upper substrate and the lower substrate respectively. Because the periphery of the display area is surrounded by the polymer ring, and the upper end and the lower end of the polymer ring are connected with the upper substrate and the lower substrate, the liquid crystal is completely isolated from the frame adhesive, and thus it is avoided that the liquid crystal is polluted.

The invention relates to the technical field of packaging of consumable items such as catheters and discloses automatic coiling and packaging equipment of the consumable items such as the catheters. The equipment comprises a wire coiling table, a bag sucking and expanding mechanism expanding openings of bags, a bag sucking and rotating mechanism sucking the bags in the bag sucking and expanding mechanism and rotating the bags to the vertical state, a bag clamping mechanism clamping the bags sucked by the bag sucking and rotating mechanism, a bag closing mechanism closing the openings of the bags and a moving insertion strip packaging the consumable items such as the catheters into the bags and moving the bags containing the consumable items such as the catheters to the bag sucking and rotating mechanism; the wire coiling table is provided with two wire coiling heads for coiling the consumable items such as the catheters; and a moving strip moving the consumable items such as the catheters on the wire coiling table into the moving insertion strip is arranged above the moving insertion strip. Automatic packaging of the consumable items such as the catheters can be completed through sequential operation of the moving strip, the moving insertion strip, the bag sucking and expanding mechanism, the bag sucking and rotating mechanism, the bag clamping mechanism and the bag closing mechanism, the automation degree is high, the packaging efficiency is high, the cost is low, and the probability of polluting the consumable items such as the catheters is lowered.

The invention relates to an intelligent medicine cabinet and a medicine dispensing method. The intelligent medicine cabinet comprises a cabinet body. The cabinet body comprises a medicine shelf, a front panel located in front of the medicine shelf, a cabinet door located on the rear side of the medicine shelf, a medicine dispensing mechanism and a control system. The invention further discloses the medicine dispensing method. According to the intelligent medicine cabinet, a medicine hopper unit can reach any needed position in the vertical plane in front of the medicine shelf, the problems ofthe medicine feeding mode and counting are well solved through the cooperation of a conveying belt and through beam sensors, when medicines are placed, only the cabinet door needs to be opened, the medicines are pushed in from back, medicines with earlier production date are placed in the front, the medicines placed this time are placed behind, operation is easy and convenient, the situation thatdue to unreasonable medicine placement, the medicines with earlier production date are out of date can be prevented, all the medicines can be dispensed at a time according to the set sequence throughinput or code scanning, use is very convenient, and the intelligent medicine cabinet is suitable for medical care medicine dispensing in hospitals and autonomous medicine dispensing for patients.

The invention provides a recombinant polymorphic hansenula polymorpha and a preparation method thereof. The recombinant polymorphic hansenula polymorpha comprises an encoding gene containing L protein of hepatitis B virus, and the encoding gene containing S protein of the hepatitis B virus. Compared with the prior art, the polymorphic hansenula polymorpha provided by the invention has the following advantages and positive effects that the polymorphic hansenula polymorpha can be independently configured into VLP (Virus Like Particle) in a human body, and the VLP is closest to HBV (Hepatitis B Virus) natural virus particles, so that the immune protective effect of the VLP to the HBV infection is theoretically higher. The polymorphic hansenula polymorpha a provided by the invention is excellent in hereditary stability, adopts methanol or glycerin as the only and one carbon source, realizes the repression/derepression inducible expression mode and enables extrinsic proteins to be efficiently expressed.

The invention discloses an automatic tape connecting device. The automatic tape connecting device comprises a mounting plate, a hot-melt tape connecting mechanism and an old material cutting mechanism; the hot-melt tape connecting mechanism is arranged on the mounting plate and is used for hot-melt connection of old material tape and new material tape; and the old material cutting mechanism is arranged on the mounting plate and is used for cutting the old material tape. According to the technical scheme of the automatic tape connecting device, the problems that when an existing automatic tapeconnecting mechanism carries out tape connecting on a new material coil and an old material coil, the efficiency of a machine is reduced, the labor cost is increased, and the quality of a battery cellis influenced due to manual adhesive preparation can be solved.

The invention discloses an equivalent liquid filling control device in the technical field of filling machines, and aims to solve the technical problems of complex structure and lower filling precision of an equivalent filling device in the prior art. The equivalent liquid filling control device comprises an exhaust pipe communicated with the atmosphere, and a liquid inlet pipe communicated with a liquid storage tank, wherein a bushing capable of vertically sliding along the liquid inlet pipe coats the lower end of the liquid inlet pipe; a lower pipe opening of the bushing is provided with a filling head in sliding sealing connection with the bushing; a through hole for mounting the exhaust pipe is formed in the filling head; the exhaust pipe is in sealing connection with the through hole; a bottle plug for sealing a filling bottle opening coats the bushing; the upper end of the liquid inlet pipe is in threaded connection with an adjusting screw sleeve; and a compression spring is connected between the adjusting screw sleeve and the bushing. The adjusting screw sleeve coats the periphery of the liquid inlet pipe; the relative positions of the bottle plug and the filling head are changed through rotating the adjusting screw sleeve so as to achieve the purpose of controlling a filling liquid level; and the liquid level control is convenient and fast.

The invention provides a limbal epithelial stem cell isolated culture method, the limbal epithelial stem cells obtained by the isolated culture method have higher cell activity and stronger cell proliferation ability, and the culture method is simple, effective and low in rejection reaction. Wherein the number of cells subjected to primary culture is 9.5-105, the positive expression rate of a surface marker is detected by flow cytometry, and a result is negative expression of a surface symbolic antibody of an antibody AE5 corneal fibroblast, negative expression of CX43 corneal stem cells, positive expression of a PCNA antibody and positive expression of a BrdU antibody.

The invention discloses a novel and practical litopenaeus vannamei RNA (ribonucleic acid) virus fast detection kit and a detection method. The detection kit comprises a PBS (poly butylenes succinate) pretreatment solution, an RNA fast extraction solution and a detection solution. The kit and the detection method have the advantages that the sensitivity is high; the specificity is high; the detection time is short; the accuracy is high; the operation is simple; the requirements on instruments and equipment are low; the pollution cannot be caused. The problems that the conventional detection method has high requirements on the equipment and the detection environment, the operation is complicated, the requirement on the specialty of technicians is high, and the like are solved. The wide application prospects are realized.

The invention provides a kit and a method for detecting BHV-2 (bovine herpes virus 2) and particularly discloses a high-sensitivity BHV-2 quantitative real-time PCR (polymerase chain reaction) detection method and a kit. The kit comprises a primer group and a fluorescent probe for detecting the BHV-2; the primer group comprises four primers for nested amplification of specific DNA fragments of the BHV-2. With the adoption of the detection method, nested amplification and quantitative real-time PCR can be completed in one tube through one-step amplification by the aid of the four primers and the fluorescent probe. With the adoption of the BHV-2 quantitative real-time PCR detection method and the kit with high sensitivity, specificity and accuracy, quick detection of the BHV-2 can be realized, the kit is very convenient to apply, and on the basis of the advantages, the kit is suitable to be popularized and applied in livestock breeding units, animal inspection and quarantine departments and the like and has wide application prospect.

The invention discloses a powder packaging machine. The machine comprises a rack, a feeding device fixed on the rack, a film discharging device and a vacuum box device which is connected to the rack in a sliding mode and reciprocates up and down relative to the rack; the film discharging device is suitable for rolling planar films into three-dimensional packaging bags; the feeding device is suitable for quantitatively conveying materials to the packaging bags; and the vacuum box device is suitable for sealing the bottoms and the openings of the packaging bags and cutting and separating the twoadjacent packaging bags. According to the machine, the planar films are adopted as raw materials of the packaging bags, and compared with outsourced packaging bags, the films are free of pollution sothat the probability that the powder materials are polluted can be reduced; and besides, the vacuum box device can seal the bottoms and the openings of the packaging bags, and the packaging bags fullof materials do not need to fall for a long distance after being separated from the upper-level packaging bags, so that the leakage of the powder materials is avoided.

The invention discloses an intensive collecting and drying device for Western medicine tablets, and relates to the technical field of medicine storage. The intensive collecting and drying device for Western medicine tablets comprises a fixed shell, a ventilating tube, a fan, a heater, a filter box, a collecting cabin and a storage cabin, wherein the fixed shell is of a box body structure; the ventilating tube, the fan, the heater, the filter box, the collecting cabin and the storage cabin are arranged in the fixed shell; the fan, the heater and the filter box are arranged in the ventilating tube; and the collecting cabin is connected to the ventilating tube. The sealed ventilating tube is arranged for preventing medicine tablets from being in contact with outside air in a drying process, so that medicine tablet pollution probability is reduced; the fan is arranged in the ventilating tube to increase air flowing velocity; the heater further improves a tablet drying rate; and the filterbox is arranged at lower positions of the medicine tablets for absorbing water.

The invention discloses a purification coil for a large-diameter polycrystalline silicon bar stock and a method of the coil. In the process of melting purification of polycrystalline materials in a vacuum zone, in order to improve the purification efficiency and polycrystalline diameter, a novel coil is designed. Different from the traditional integral coil, the purification coil is splitted intotwo symmetrical parts; as the coil can be splitted into two independent parts, the coil can be removed when the polycrystalline materials above and below the coil are solidified together in a meltingzone, the purified polycrystalline materials are still connected with an upper shaft, and thus disassembly and assembly materials and subsequent pickling procedures are omitted, and the maximum diameter of the grown single crystal is changed from 2 inches to 3 inches, so that the qualified rate of products is improved, the operation procedures are simplified, the probability of contamination by external harmful impurities in the purification process is reduced, the production efficiency is improved, and the cost is reduced. The split type coil is very simple to design and use, and is beneficial to replacement and maintenance.

The invention discloses a chemical discharge sewage sampling detection device, and relates to the field of chemical sewage. The device comprises a rubber drum, the output end of the rubber drum is connected with a rubber pipe, the bottom end of the rubber pipe is fixedly provided with a moving rod, the outer wall of the moving rod is provided with a protective sleeve, and the outer wall of the protective sleeve is provided with a handle. A sampling opening penetrating through the outer wall of the protective sleeve is formed in the inner wall of the protective sleeve. By arranging a second bottle, a connecting rod, an inner connecting rod, a control switch, a detector and a display screen, when a user takes out the second bottle through the moving rod, the top end of the second bottle is separated from the moving rod, and the top end of the second bottle is sealed through a sealing plug, the rubber block in the internal connecting rod at the bottom end of the second bottle is tightly connected with the detection needle in the fixing groove in the top end of the detector, the control switch is started, the detection effect is obtained by observing the numerical value of the displayscreen, the user can rapidly and conveniently obtain the detection effect, meanwhile, the probability that a sample is polluted is reduced, and the transportation cost is reduced.