95results about How to "Reduced risk of cross-contamination" patented technology

The invention provides a method for one-step column separation of Sr, Nd and Pb in a geologic sample. The method comprises the following steps: dissolving the geologic sample to obtain a sample solution; and chemically separating, allowing the sample solution to go through an exchange column supported with A cation resin and Sr specific resin to respectively separate Sr, Nd and Pb, wherein the A cation resin is positioned at the upper layer of the exchange layer, the Sr specific resin is positioned at the lower layer of the exchange column, the A cation resin is a strong acid cation exchange column containing a sulfonic acid exchange group and adopting a styrene-divinyl benzene copolymer as a skeleton, the cross-linking degree of the A cation resin is 12%, and the Sr specific resin is an inert resin support supported with a solution formed by dissolving dicyclohexyl crown ether in a liquid organic solvent.

The invention relates to a super-sensitivity method, primer group and kit for capturing whole genome of novel coronavirus. The method can conveniently and quickly amplify the whole genome of the novelcoronavirus by using a small amount of RNA, and can directly dock with a second-generation sequencing library-building reagent and a third-generation sequencing platform so as to obtain a whole genome sequence of the novel coronavirus.

The invention discloses an automatic sample injection system based on a micro-fluidic chip. The automatic sample injection system comprises a micro-fluidic chip and a sample injection device for inputting samples into the micro-fluidic chip, and further comprises a negative pressure control device for generating negative pressure, wherein the sample injection device comprises a porous plate for accommodating samples; a suction needle is connected to the sample injection port of the micro-fluidic chip in a sealed manner; the negative pressure control device generates air pressure from the porous plate to the micro-fluidic chip, so that the samples in the porous plate are sucked into the micro-fluidic chip through the suction needle. According to the automatic sample injection system, the samples are directly led into the micro-fluidic chip through the suction needle by virtue of the negative pressure, manual sample adding is avoided, the detection automation degree is improved, and the cross contamination risk is reduced.

The invention discloses a plate chain type conveyor. The plate chain type conveyor comprises racks, two pairs of chain wheels supported at the two ends of the racks, and conveyor belts which are wound on the two pairs of chain wheels, wherein each conveyor belt is composed of two conveying chains and one group of material plate. The plate chain type conveyor is characterized in that a support lug is arranged at one edge, close to a chain plate on one side of the material plate, of each of the two conveying chains in a manner of extending outwards; a connection hole is formed in one front end of each support lug along the movement direction of the conveying chains, and a spring pin is arranged at the other end of each support lug; the spring pins are fixedly arranged on the outer sides of the support lugs and nail rods of the pins penetrate through the support lugs to enter the inner sides of the support lugs; when the conveying chains are at a stretched state, the distances from each connection hole to the adjacent two spring pins are equal; when the conveyor belts are located on the upper sides of the chain wheels, one end of each material plate is hinged with the connection holes in the support lugs of one pair of chain sections, and the other end of each material plate is supported on one rear spring pin adjacent to the connection holes. Unloading control devices are arranged on the rack close to the rail ends of the upper and lower layers of conveyor belts respectively.

The invention discloses a blood collection tube labeling and assembling automatic connecting device which comprises a transfer device A (1), a lifting section (2), a transfer device B (3) and a reverse removing section (4). Each transfer device comprises a carrying platform and a rotating disc, wherein vacuum material suction devices are evenly distributed on the lower surface of the rotating disc circumferentially, and the rear end of the carrying platform is located at the lower portion of the rotating disc. The transfer device A (1) conveys materials outputted by a labeling machine (6) to a discharge bin A (7). The discharge port of the discharge bin A (7) is located at the upper portion of a lifting conveying belt (8). The transfer device B (3) conveys materials outputted by the lifting conveying belt (8) to the reverse removing section (4) and a horizontal conveying belt (12). A detecting device (14) and a removing device (15) are arranged on one side of the horizontal conveying belt (12). The blood collection tube labeling and assembling automatic connecting device has the advantages that full automation is achieved in the production process from labeling to assembling, personnel for arranging, transferring and placing products are omitted, work efficiency is improved, labor intensity is lowered, and production cost is saved.

The invention provides a fluorescently label amplification kit for simultaneously amplifying human 27 STR loci. The fluorescently label amplification kit comprises 24 autosomal STR loci, one Y-chromosome STR locus, and two specific amplified primer pairs for gender-identified STR loci. The loci are D3S1358, TH01, D21S11, D18S51, Penta E, D5S818, D13S317, D7S820, D16S539, CSF1PO, D2S1338, D6S1043,D22S1045, D19S433, D1S1656, D12S391, D10S1248, D2S441, vWA, D8S1179, TPOX , FGA, SE33, Penta D, DYS391, Y-INDEL and Amelogenin. The loci contain 20 core loci and four preferred loci as prescribed by the Ministry of Public Security, all sites of mainstream kits currently on the market are covered, the risk of incorrect gender identification due to the deletion of the Y-chromosome can be effectivelyprevented, and the advantages of high discrimination power and high probability of paternity exclusion are achieved.

This disclosure provides systems, methods and apparatus for processing multiple substrates in a batch cluster tool. A batch cluster tool can include a transfer chamber, an etch process chamber, and one or both of an ALD process chamber and an SAM process chamber. Each of the batch process chambers can be a common chamber where the substrates are open to one another, or can include multiple process subchambers that are isolated from one another in operation. Multiple substrates are transferred into an etch chamber. The substrates are exposed to a vapor phase etchant. The substrates can then be transferred to an atomic layer deposition (ALD) chamber and exposed to vapor phase reactants to form a thin film. The substrates can be transferred either from the etch process chamber or the ALD chamber to a third chamber and exposed to vapor phase reactants to form a self-assembled monolayer (SAM).

The invention belongs to the technical field of virus detection, and specifically relates to a triple fluorescent PCR detection kit for the infectious spleen and kidney necrosis virus, largemouth bassranavirus and siniperca chuatsi rhabdovirus. The kit of the invention comprises virus-specific amplification primers and probes, a positive standard, a negative standard, Taq enzyme, reverse transcriptase, a RNA enzyme inhibitor, a reaction buffer, dNTP, nuclease-free water and a freeze-drying protective agent. The kit of the invention can perform multiple channel detection at the same time by using triple fluorescent PCR, uses the different fluorescently labeled probes, can detect the three viruses simultaneously in one reaction system, reduces the detection difficulty, shortens the detection time, and can help raisers accurately get detection results in time. The kit of the invention has high detection sensitivity, high stability and strong specificity, has no cross-reactions with otheraquatic viruses, and can be used for early monitoring and prevention and control of epidemic diseases.

The invention provides a direct use type high-fidelity PCR amplification reagent mixture which is high in fidelity, stability and using convenience. The reagent mixture comprises DNA polymerase, KCl, Tris-HCl, MgSO4, (NH4)2SO4, dNTPs and glycerinum, and ddH2O serves as the solvent. In certain optimized embodiments, the reagent mixture further comprises an optimizer which is one or more of DMSO, tetramethylene sulfoxide, hydroxyproline, trehalose, ethanediol and BSA. In use, PCR can be conducted simply by adding a template and a primer to an amplification system, operation processes are simplified greatly, operation time is shortened, and pollution is reduced; meanwhile, due to the fact that the system contains the optimizer, PCR amplification fidelity and stability can be improved remarkably, and the fidelity of the reagent mixture reaches 2.3*10<-7> to 3.9*10<-7>.

The invention discloses a preparation method for a single-phase crosslinked sodium hyaluronate gel. The method specifically comprises the following steps: sodium hyaluronate alkali treatment-a 1,4-butanediol diglycidyl ether cross-linking reaction-dialysate dialysis-preliminary granulation-and colloid mill grinding granulation. The method provided by the invention controls a crosslinking degree ofa crosslinking agent and HA through designing reaction conditions, so that a gel with suitable viscoelastic properties is obtained, a gel particle diameter suitable for secondary granulation of a colloid mill is obtained by subsequent preliminary crushing, and finally the crosslinked sodium hyaluronate gel with a target diameter is obtained by selection of appropriate colloid mill granulation parameters; and since the final product has suitable rheological properties, small particle sizes and uniform distribution, artificial operation in the production process can be reduced, the risk of cross contamination is reduced, the production filling process can be met without adding lubricants, the production cycle is shortened, the situation that two-phase cross-linked products are difficult tomix uniformly is avoided, the risk of clinical use is reduced, and product quality is improved.

The invention relates to a set of multicomponent cartridges having at least two multicomponent cartridges (2), wherein each multicomponent cartridge (2) comprises at least a first and a second receiving chamber (3, 4) for components to be discharged, wherein each receiving chamber (3, 4) is configured substantially cylindrically and extends in a longitudinal direction (A), wherein the receiving chambers (3, 4) are arranged parallel to one another and have the same extent (L) in the longitudinal direction (A), wherein each multicomponent cartridge (2) is produced in one piece, so that the receiving chambers (3, 4) thereof are non-detachably connected to one another, and wherein the first receiving chamber (3) of each multicomponent cartridge (2) of the set (1) has the same external diameter (D1).

The invention provides a low-lactose low-lactoprotein depth hydrolysis infant formula food. The food comprises, by mass, 740-800 parts of vegetable fat powder, 160-200 parts of depth hydrolysis lactoprotein powder, 26-32 parts of mineral substances, 8-12 parts of fructo-oligosaccharide, 8-12 parts of vitamins and 0.3-0.5 part of nucleotide. The low-lactose low-lactoprotein depth hydrolysis infantformula food is good in stability in a goods shelf period, the risk of cross pollution is small in the preparation process, and the residual oxygen content is low.

The invention discloses a prefilled injector for medicine dissolution and a dispensing device. The prefilled injector comprises a push rod, a piston, a needle tube and a protective cap, wherein the needle tube is provided with a medicine dissolution joint, the medicine dissolution joint is in matched connection with an external cone joint of a prefilled injector for injection, and the protective cap is in sealed connection to an opening of the medicine dissolution joint. During medicine dispensing, the protective cap of the prefilled injector for the medicine dissolution and a protective cap of the prefilled injector for injection are taken off, then, the medicine dissolution joint is directly in matched connection with the external cone joint of the prefilled injector for injection, pushrods of the two injectors are pushed repeatedly for medicine dispensing, after medicines are sufficiently dissolved, the prefilled injector for medicine dissolution is directly taken down, finally, the needle is mounted at the external cone joint of the prefilled injector for injection for injection. The scheme simplifies the dispensing process, the workload of a medical worker is reduced, and puncture scrap falling and cross pollution can be avoided. The invention also discloses the prefilled injector for injection and the dispensing device for the prefilled injector for medicine dissolution.

The invention relates to an automatic transmission cabinet. The automatic transmission cabinet comprises a cabinet body respectively provided with a front cabinet door and a back cabinet door at the front and back two ends; the front cabinet door and the back cabinet door have the same structure; the front cabinet door includes a front door frame, an automatic transmission line I and a front automatic door sheet; the upper end of the front automatic door sheet is hinged with the front door frame; the automatic transmission line I is arranged above a lower wall plate of the front door frame; a front electric pushing mechanism is fixedly mounted on an upper wall plate of the front cabinet door, and is connected with the upper end of the front automatic door sheet; and cabinet doors on two sides of the front electric pushing mechanism are respectively provided with a photoelectric induction device I and a photoelectric induction device II. The automatic transmission cabinet has the following beneficial effects: when materials are automatically transmitted, mutual isolation of two areas is realized, so that mutual air flowing between the areas is stopped, the risk of cross contamination is reduced, and the saving of energy is facilitated; the labor intensity is relieved; the pollution of external materials to indoor spaces is effectively prevented; and the cabinet doors can be singly used, and can be conveniently matched with other automatic production lines for use.

The invention discloses a reagent set, a kit and a detection method for detecting fungal infection, and relates to the field of biotechnology. The reagent set comprises one of the following reagents or a combination of two of the following reagents: a PCR buffer and a complex enzyme preparation. The PCR buffer contains the following components: potassium acetate, MgCl2, glycerol, DMSO, Tween-20, and PEG-200. The complex enzyme preparation contains the following components: snail enzyme, lysozyme, papain and laccase. The reagent set can directly detect samples such as blood without the steps such as nucleic acid extraction and purification, and has the advantages of high sensitivity, good specificity and short detection time.