17results about How to "No cross contamination" patented technology

The invention discloses a composite additive for a vanadium electrolyte and a preparation method of the composite additive, and relates to the technical field of vanadium batteries. The composite additive is applied to the electrolyte of the vanadium battery, the electrolyte is a positive electrode electrolyte and a negative electrode electrolyte, the concentration of the vanadium electrolyte can be improved, precipitation and crystallization of vanadium ions can be inhibited, and meanwhile, the electrochemical activity of the vanadium battery can be improved. The composite additive comprises a mixture formed by a first component and a second component, the first component comprises at least one of a fluorine-containing compound, oxyacid and oxysalt, and the second component is a surfactant.

The present invention discloses an ambient air constant-current automatic sampling system and a sampling method thereof. The system includes a vacuum sampling tank, a buffer container and a switching valve. The buffer container is respectively connected to the vacuum sampling tank and the atmospheric environment through the switching valve. Through the switching control of the switching valve, the buffer container is alternately connected to the atmospheric environment and the vacuum sampling tank to achieve the pressure balance of the sampled gas. The present invention also discloses a constant-current ambient air sampling method. The present invention breaks the foreign technical monopoly on high-precision atmospheric constant-current sampling devices, ensures the accuracy of atmospheric sampling flow control, ensures the inertness of the overall gas flow path, has flexible flow control and adjustment methods, uses commonly used industrial mass-produced devices and materials, realizes consumable-free and easy maintenance, and constructs an economical and efficient fully automatic ambient air constant-current automatic sampling system, contributing to the country's atmospheric environment monitoring and governance.

The utility model relates to the technical field of sample extraction equipment, and discloses sample extraction equipment for plant quarantine, which comprises a workbench, a grinding table is arranged on the upper surface of the workbench, a sampling table is fixedly connected to the upper surface of the workbench, a dismounting assembly is arranged at the top of the workbench, and a pressing assembly is arranged at the top of the workbench. The pressing assembly is used for pressing a plant sample, the dismounting assembly comprises lantern rings, the lantern rings are fixedly connected to the top of the workbench, a plurality of insertion columns are fixedly connected to the side wall of the grinding table, the insertion columns are slidably connected to the interiors of the lantern rings, first sliding blocks are slidably connected to the interiors of the insertion columns, and springs are arranged in the insertion columns. And one end of the spring is fixedly connected to the side wall of the grinding table. According to the grinding table disclosed by the utility model, the grinding table can be quickly disassembled through a convenient disassembly mode between the insertion column and the lantern ring, so that the grinding table can be comprehensively and carefully cleaned, and no sample residue and cross contamination are ensured.

The utility model relates to a urine collector, and belongs to the technical field of medical auxiliary instruments. Comprising a urine collecting bottle and a urine collecting funnel, the urine collecting funnel is fixed to the upper portion of the urine collecting bottle in a detachable connection mode, and a flow dividing assembly and an air guide pipe are arranged in the urine collecting funnel. The shunting assembly comprises at least one separator, and the separator is arranged at the bottom of the urine collecting funnel and is provided with at least one shunting gap communicated with the urine collecting bottle and the urine collecting funnel; one end of the air guide pipe penetrates through the shunting assembly and extends into the urine collecting bottle, and the other end of the air guide pipe is communicated with the outside and used for balancing air pressure inside and outside the urine collecting bottle; when the liquid level of the urine in the urine collecting bottle is in contact with the bottom end of the gas guide tube, the urine is prevented from continuously flowing into the urine collecting bottle through the flow dividing gap by virtue of a pressure difference. By means of the urine collecting device, the problems that in the prior art, a urine collecting device is complex in structure and large in operation difficulty are solved.

This invention proposes a multi-channel gas distribution calibration device, comprising a multi-inlet, one-outlet solenoid valve assembly. The inlets of the solenoid valves in the assembly are each connected to an inlet nozzle via pipelines. The outlets of the solenoid valves are sequentially connected via pipelines to a proportional valve, an orifice flow meter, and a three-way connector. The second port of the three-way connector is connected to a glass rotor flow meter, which is connected to an exhaust gas port. The third port of the three-way connector is connected to an outlet gas port. This invention, by connecting nine standard gas lines and one zero gas line through the multi-inlet, one-outlet solenoid valves, can achieve calibration of one gas at multiple concentrations or nine different gases. It eliminates the need for manual gas cylinder replacement and pipeline switching, enabling rapid gas switching and ensuring no cross-contamination. This significantly reduces the impact of manual intervention and operation time, improving calibration efficiency and reliability.

The invention discloses a full-automatic single-chip microbiological detection system. The system comprises a micro-fluidic chip, a cam mechanism, a pressing module for driving the cam mechanism to do reciprocating rectilinear motion, a first on-off assembly and a second on-off assembly, during working, the pressing module drives the cam mechanism, the first on-off assembly and the second on-off assembly to linearly move to approach the micro-fluidic chip, the second on-off assembly controls the micro-fluidic chip to be communicated with the atmosphere, and the cam mechanism sequentially controls the first on-off assembly to open or close a flow channel on the micro-fluidic chip. Controlling the solution to be transferred into a target chamber for a microbiological detection experiment; various solutions are quantitatively filled into the storage cavity in the micro-fluidic chip in advance, the corresponding solutions are controlled to be transferred into the target cavity for experiments in different experiment steps based on cooperation of a cam structure, the on-off puncture assembly and the like, reagent bottles and pipelines do not need to be externally connected, operation is easy and convenient, stability is good, and reliability is high.

The invention relates to the technical field of syringes, in particular to a needleless emitter and a using method thereof.The needleless emitter comprises a needleless prefilled medicine core used for conveying liquid medicine and a retaining structure used for limiting the needleless prefilled medicine core; the retaining structure is used for locking and matching the needleless pre-filling and sealing medicine core with the needleless emitter to prevent the needleless pre-filling and sealing medicine core from rotating during disassembly; when the needleless pre-filling and sealing medicine core needs to be removed, the unlocking mechanism on the retaining structure is operated to unlock the needleless pre-filling and sealing medicine core. The prefilled emitter has the beneficial effects that the prefilled emitter can reduce liquid medicine residues to the maximum extent, and the dosage is more accurate; tedious medicine pumping is avoided, and operation is convenient; the advantages of small wound, no pain, high absorption efficiency, avoidance of needle terrorism and the like of needle-free injection can be achieved; various thrust structures improve the stability and operability of needle-free pre-filling and sealing medicine cores of different specifications in the using process.

The utility model discloses a laboratory pipette, and particularly relates to the technical field of experimental equipment, the laboratory pipette comprises a base, the top of the base is provided with a top plate, the top plate is internally provided with a pipette body, the bottom of the pipette body is provided with a liquid taking pipe, and a connecting plate is arranged between the base and the top plate; the clamping mechanism comprises a mounting block and a clamping seat, the mounting block is mounted on one side of the connecting plate, the clamping seat is fixed on one side of the mounting block, and a groove is formed in the clamping seat; according to the utility model, through the arrangement of the clamping mechanism, the pipette body can be stabilized during working, so that the pipette body is not easy to shake or deviate, thereby avoiding the situation that a user needs to support the pipette body in the operation process; the hand fatigue and pressure of a user and unnecessary accidents are reduced, the accuracy and consistency of the device during liquid transfer are improved, and the safety of liquid transfer operation is improved.

This invention proposes a multi-channel electrochemical sensing chip for detecting AHLs, its fabrication method, and its applications. The chip includes a substrate, an electrode layer, an aptamer immobilization carrier layer, an aptamer self-assembly layer, and a mesoporous silica protective layer. The electrode layer includes multiple working electrode channels, a common counter electrode, and a common reference electrode, all electrically isolated by an insulating layer. Each working electrode channel includes at least two detection channels and one negative control channel. The aptamer self-assembly layer includes various aptamer sequences that specifically bind to AHLs. Different detection channels are configured with different aptamer sequences. The negative control channel is configured with random mismatched or nonsense aptamer sequences. The aptamer 5' end is modified with an aptamer sequence immobilization group, and the 3' end is modified with an electrochemical signal tag. The technical problem addressed is how to achieve simultaneous, highly sensitive, and biofouling-resistant in-situ continuous monitoring of multiple components of AHLs to meet the needs of interspecies interaction research in microbial aggregates.

The invention provides a micro-pulse peristaltic pump type diabetes insulin pump which comprises a shell, a micro-pump medicine bin assembly, a micro motor and a gear assembly are arranged in the shell, and the micro-pump medicine bin assembly is detachably connected with the shell; a medicine bin containing insulin and a micro peristaltic pump used for pumping the insulin are arranged in the micro pump medicine bin assembly, and the two ends of a pump pipe of the micro peristaltic pump are connected with the medicine bin and an external medicine conveying guide pipe respectively. The micro motor is a flat motor, and the ratio of the diameter to the length of an armature of the micro motor is 8: 1. The insulin pump is different from a plunger type insulin pump existing in the current market, a power device adopts a micro peristaltic pump and is combined with a micro flat torque type motor, a speed reducing mechanism does not need to be arranged, the output torque is effectively increased in a limited space, and the dual requirements of the insulin pump for high-precision and low-power-consumption driving are met; the equipment is obviously simplified, and the weight of the equipment is reduced. Meanwhile, flexible supplement of liquid medicine can be achieved through the detachable medicine bin, the medicine bin can be repeatedly used, and the material consumption is reduced.

The utility model provides a Luer multi-channel connector with a forced mixing assisting function and a mixing suite. The Luer multi-channel connector with the forced mixing assisting function comprises a forced mixing assembly, and at least two Luer connectors are arranged outside the forced mixing assembly for connection; the forced mixing assembly comprises an I-shaped hollow cavity, a Y-shaped hollow cavity, an L-shaped hollow cavity, a V-shaped hollow cavity or an X-shaped hollow cavity and a built-in mixing assisting part, and the mixing suite comprises a Luer multi-channel connector with a forced mixing assisting function, at least one injector pre-filled with liquid and at least one injector pre-filled with solid-phase powder which are combined to form a closed forced mixing system. By alternately pushing the plunger rods of the at least two injectors, liquid and solid powder or another liquid are alternately forced in a reciprocating manner in the plurality of injectors through the mixing suite for multiple times to obtain homogeneous solid-liquid or liquid-liquid mixture. According to the utility model, the solid phase and the liquid phase which are pre-filled in the injector can be conveniently and quickly forced to be mixed, bubbles can be reduced, external pollution and material waste are avoided, and the operation preparation time is shortened.

The application relates to the technical field of dustproof test boxes, in particular to a dustproof test box device capable of recycling dust, which comprises a test chamber, a collecting hopper, a first pipe body, a blower, a dust return pipe, a transfer box, a movable box body and a dust collecting assembly, the collecting hopper is fixedly connected to the inner side of the top of the test chamber, the first pipe body is fixedly connected below the discharge end of the collecting hopper, the movable box body is slidingly connected below the discharge port of the transfer box, and the blower is installed on the outer side of the dust return pipe. The dustproof test box device capable of recycling dust can store different kinds of dust through two groups of switchable movable box bodies. When it is necessary to switch the test, the dust can be temporarily stored in one box body, the other box body is filled with new dust for continuing the test, and the dust which is not exhausted is avoided from being directly discarded. Through the closed loop cooperation of the blower, the dust return pipe and the transfer box, the dust after the test can be collected to the transfer box, and the same kind of dust can be recycled for multiple times.

The present application relates to the technical field of micro-ecological diagnosis and treatment, and is a multi-chamber different point intestinal flora collection device, comprising a shell, a driving switching module and a plurality of circumferentially distributed sampling shells. The shell is designed in a split type, facilitating sample recovery; each sampling shell inlet is covered with a slow-release layer with different dissolution characteristics, which can respond to specific environmental parameters of different sections of the intestine. After a slow-release layer in the target intestinal section dissolves to trigger single-point sampling, the sampling shell is automatically driven to switch, allowing the next sampling shell to enter the working position. The device realizes automatic, time-sequential and multi-point precise sampling in a single intestinal journey, ensures independent and non-cross-contaminated samples at each point, and can obtain in-situ liquid samples at multiple points in the intestine, truly reflecting the spatial distribution heterogeneity and dynamic change rule of the flora, and providing key technical support for intestinal micro-ecological research, disease diagnosis and personalized treatment.

The utility model discloses a kind of automatic packaging equipment for lithium battery raw material, including nitrogen isolation storehouse, nitrogen isolation storehouse is equipped with sectional conveyor and by sectional conveyor in sequence cascaded front replacement chamber, packaging chamber and rear replacement chamber, automatic bagging device, automatic weighing filling device and automatic bagging mouth device are sequentially equipped in packaging chamber along material conveying direction, the inlet and outlet of front replacement chamber and rear replacement chamber are equipped with automatic isolation door, packaging barrel is replaced by nitrogen after carrying out in front replacement chamber, into packaging chamber, carries out automatic packaging, subsequently air replacement after carrying out in rear replacement chamber, and flows into subsequent process. The utility model forms full-closed nitrogen filling packaging space, successfully isolate lithium battery raw material with high activity, high sensitivity and air environment, maximum degree protects the chemical activity and purity of raw material, avoids the problems such as battery capacity attenuation, cycle life shortening, poor slurry stability caused by material deterioration.

The utility model discloses a kind of magnetic separation granulation devices for polyether ether ketone production, including granulator and magnetic separator, the granulator is equipped with feeding hopper and blanking port, the side of granulator is equipped with feeding fan, the air outlet of feeding fan is equipped with feeding pipeline, the top of feeding pipeline is equipped with first receiving funnel, first receiving funnel is located just below blanking port, the end of feeding pipeline away from feeding fan extends to just above magnetic separator. The utility model is matched with S-shaped distributor by feeding fan, utilizes drive box to drive first spur gear and second spur gear to engage, so that distributor rotates and evenly disperses material, rectangular blanking port of second receiving funnel covers entire first electromagnetic roller length, ensure that material forms uniform material layer on electromagnetic roller surface, avoid magnetic selection blind area caused by accumulation, significantly improve impurity adsorption efficiency.

This invention provides 13 High-abundance CO was prepared by CuO catalytic oxidation. 13 This invention relates to a CO2 apparatus and method, belonging to the field of stable isotope-labeled compound preparation technology. The apparatus described in this invention is an integrated unit comprising a feed gas supply unit, a fixed-bed reaction unit, a cryogenic collection unit, a partial pressure purification unit, and a tail gas treatment unit connected in series. The fixed-bed reaction unit includes a fixed-bed reactor, a heater, and a temperature sensor. This invention utilizes high-temperature calcined modified CuO catalyst particles, combined with a composite bed structure design of "quartz wool-quartz sand-catalyst-quartz sand," significantly improving conversion efficiency and selectivity; optimizing the purification process, achieving product quality that meets high-end application standards; featuring a novel apparatus design with greatly improved sealing and stability; simple and controllable operation, facilitating industrial scale-up; and being green, safe, and environmentally friendly, aligning with industrial development trends.

The present invention relates to the field of high-throughput sequencing, and in particular to a single-tube nested multiplex PCR amplification method for high-throughput targeted sequencing, that is, using different primers with different melting temperatures (Tm), by setting two groups of different PCR reaction stages, a single-tube nested multiplex PCR reaction is achieved. The PCR products are connected by connectors to finally complete the construction of an amplicon library. The present invention utilizes nested PCR to improve the sensitivity and specificity of traditional PCR, while overcoming the disadvantage of easy cross-contamination of traditional nested PCR. When this method is applied to the construction of an amplicon library, it can greatly improve the detection sensitivity, specificity and library construction efficiency, and is particularly suitable for high-throughput sequencing analysis of viral resistance mutant genes or other low nucleic acid content samples.