400results about How to "Avoid mutual contamination" patented technology

The invention discloses a printing spray head device based on a microfluidic chip. The printing spray device comprises a chip substrate, wherein at least one material flow passage and a at least one control flow passage are formed in the chip substrate; the material flow passage is used for conveying a printing material; a fluid substance with controllable pressure flows in the control flow passage; the control flow passage and the corresponding material flow passage are intersected and a control valve is formed at an intersection; the control valve comprises a flexible film for isolating the control flow passage from the corresponding material flow passage at the intersection; the flexible film changes shape according to the pressure in the control flow passage to control connection and cutoff of the material flow passage. The printing spray device can alternately print multiple materials through a single spray head in once printing process.

There is provided a highly reliable autoanalyzer less liable to sample and reagent carry-over and capable of preventing contamination and precisely pipetting samples and reagents. Using a sample pipetting nozzle 27 having water-repellent surfaces, a sample is pipetted from a sample cell 25 to a reaction cell 4 having a hydrophilic bottom face.

The invention discloses an apparatus for collecting water and sampling on multiple points as well as an unmanned aerial vehicle sampling system and sampling method, which belongs to the technical field of acquisition of a water sample. The apparatus is provided with parts such as a shell, an upper plate, a bottom plate, a coiled pipe assembly, a position adjusting assembly and a water collection assembly, wherein corresponding parts in the coiled pipe assembly are accurately controlled by virtue of the position adjusting assembly, the flushing process and water injection process of a water pipe can be realized, and the water quality detection process of a sampled water area can be completed by virtue of the water collection assembly, so that the collection of various water samples in various water areas can be accurately and rapidly realized. The multi-point water collection and sampling apparatus has the advantages that the structure is simple and the setting is simpleand convenient;the control method of the unmanned aerial vehicle sampling system carrying the multi-point water collection and sampling apparatus is simple; and the rapid collection of a plurality of water samples in various water areas can be effectively realized, the accuracy of the water sample in the collection process can be ensured, the pollution of the sample and the damage to the part can be reduced, thewater sample collection efficiency is improved, the water quality detection accuracy is improved, the water quality detection cost can be reduced, and the application prospect and application popularization value are relatively good.

The invention relates to a glass storage and transport device which comprises a bracket, a pair of forklift limiting grooves and a pair of limiting mechanisms, wherein the bracket is a cube formed by four longitudinal beams and a plurality of cross beams, the pair of forklift limiting grooves is arranged at the bottom of the bracket, the limiting mechanisms are arranged at upper parts of two opposite sides of the bracket, each limiting mechanism comprises a limiting block fixing rod and a row of limiting blocks, the limiting blocks are connected to the limiting block fixing rods according to the thickness of glass to form the limiting grooves. Compared with the prior art, the glass storage and transport device has the advantages of accelerating glass drying and cooling speed, avoiding cross pollution of paint between two pieces of glass, achieving simple structure, saving production space and solving storage and transport problem.

The invention relates to a method for preparing high-purity cobalt by adopting hydrochloric acid solution system electrodeposition. The method is characterized in that the technical process is sequentially as follows: hydrochloric acid solution system is adopted and 99.95% of electrodeposition cobalt is taken as an anode; a CoCI2 solution with ph of 3-3.5 is prepared by an electrolytic solution; the regular electrolytic solution is sequentially led into anion exchange resin for ion exchange deep clarification, and finally led into an electrobath for electrodeposition; the solution amount prossed by ion exchange clarification is equal to extracted and electrodeposited solution; the high-purity cobalt is obtained by electrodeposition. The electronic torch melting is carried out on high-purity cobalt to prepare high-purity cobalt ingot which can meet the requirements of different users. The high-purity electrodepositing cobalt of 5N or more than 5 N and high purity ingot are reached by high-purity cobalt prepared by the method processed by glow discharge mass spectrography-GDMS analyzing.

The invention relates to a handheld continuous sampling device comprising a shell, a wiping matched part, a driving wheel, a driven wheel, a conveyor belt and a limiting device, wherein the wiping matched part is fixedly arranged in the shell and is exposed at a notch of the shell; the driving wheel is fixedly arranged in the shell and is provided with a first winding part for winding the conveyor belt; the driven wheel is fixedly arranged at one end, which is far away from the wiping matched part, in the shell and is provided with a second winding part; the two ends of the conveyor belt are fixed after bypassing a wiping part and are partially wound on the first winding part and the second winding part; and the limiting device is used for limiting the conveyor belt to continually move along a pre-set direction. According to the handheld continuous sampling device disclosed by the invention, a route range of the conveyor belt is controlled through the limiting device so as to prevent the conveyor belt stuck with sampled test paper from winding and prevent samples from mutually polluting; in addition, according to the invention, sampling carriers for each time of wiping can be continuously and automatically replaced and a problem that the samples are polluted so as to run off and fail to report, which is caused by the factor that the sampled samples contact mutually, is avoided; and therefore, the missing report rate is reduced.

The invention discloses a battery plate packing device which comprises a rack and a conveying device, wherein the conveying device is arranged on the rack; the conveying device is a cyclic conveying channel, and mold boxes are arranged on the outside of the conveying channel; a positive plate packing device, a positive plate compressing device, a negative plate packing device, a negative plate compressing device and a discharging device are sequentially arranged in the cyclic direction of the conveying channel, wherein the structures of the positive plate packing device and the negative platepacking device are same, the structures of the positive plate compressing device and the negative plate compressing device are same; and the positive plate packing device comprises a paper feeding device, a paper cutting device, a paper folding device and an upper plate device which are sequentially arranged along the conveying direction of the conveying channel. The battery plate packing device disclosed by the invention is suitable for being used for packing battery plates.

The invention provides a suspension type biological indicator of which the stability is good and spores are not easy to sprout. The biological indicator comprises a plastic tube of which the two ends are sealed by fusing, wherein bacterial tablets and a culture medium ampoule tube are arranged in the plastic tube; the invention further provides the preparation method of the biological indicator, and the preparation method comprises the following steps: sealing one end of the plastic tube by fusing for standby application; allowing a hydrophilic support to carry a specified number of spores and drying the spores to form the bacterial tablets, and encapsulating a recovery medium with pH indicating liquid in a glass tube to form the culture medium ampoule tube; placing the bacterial tablets and the culture medium ampoule tube in the plastic tube, and sealing the other end of the plastic tube by fusing. According to the suspension type biological indicator and the preparation method thereof, provided by the invention, the spores are in a dry state and the quality stability of the products is improved, during storage, the spores are isolated from the liquid recovery medium, therefore the spores do not grow, even the storage temperature is the same as the spore growth temperature, and the biological indicator can be stored at room temperature. The suspension type biological indicator can serve as indicator bacteria of various spores that are different in growth temperatures.

The invention discloses a separable mask with an internal arching strip. The separable mask comprises mask cloth and bands for fixing the mask cloth, and is characterized in that an annular interlayer is arranged on the inner side of the mask cloth, the inner circumference of the interlayer is separated from the mask cloth, the interlayer is provided with an annular connecting line for connecting the interlayer with the mask cloth, and the connecting line is located on the outer side of the portion, separated from the mask cloth, of the interior of the interlayer to accordingly form a groove with an inwards-opened opening; a pressing piece is arranged and matched with the groove in size and shape to accordingly enable a part of the edge of the pressing piece to be installed in the groove, and separable connection with the mask cloth or the interlayer is accordingly achieved; the pressing piece is provided with a strip-shaped body arching towards the region, surrounded by the groove and located in front of the mouth or the nose, of the mask cloth, and the mask cloth is ejected through the strip-shaped body from the region, in front of the mouth or the nose, of the inner side of the mask cloth. Materials can be saved, the air impermeability can be improved, the effective air inspiration breathable area of the mask can be increased, the comfort of the mask can be improved, and the separable mask is healthier.

The invention relates to an external recycle thermal perfusion therapeutic equipment, comprising a water tank, a heater, a cooler, an external recycle pump, a recycle guide pipe, a heat exchanger, a temperature sensor and an industrial computer. An electric heating or semiconductor heating and semiconductor cooling constant temperature recycle device is adopted in the external recycle system of the invention; the temperature sensor is arranged in the perfusion end of an internal recycle system. The temperature of liquid at the perfusion end of the internal recycle system can be accurately controlled by that the heat exchanger supplies heat source for the internal recycle and the industrial computer sends heating or cooling signals to an electronic controller for controlling the heating or cooling; in constant temperature the temperature control precision is plus minus 0.1 DEG C, so that the purpose of thermal perfusion in constant temperature can be achieved.

The invention discloses a method for preparing a tungsten-doped vanadium oxide film, comprising the following steps of: firstly, placing the cleaned substrate into a high vacuum chamber; secondly, introducing high-purity argon gas into a vacuum chamber; respectively carrying out sputter cleaning on the surfaces of a metal vanadium target and a metal tungsten target by turning on a vanadium target sputter power supply and a tungsten target sputter power supply under the condition that the substrate is shielded by using a substrate baffle; introducing high-purity oxygen gas into the vacuum chamber; opening the substrate baffle, closing a tungsten target baffle, turning on the vanadium target sputter power supply and depositing a bottom layer vanadium oxide film; after the depositing the bottom layer vanadium oxide film, closing oxygen gas and the vanadium target baffle and turning off the vanadium target sputter power supply, turning on the tungsten target sputter power supply and opening the tungsten target baffle and depositing an intermediate layer of tungsten film; after depositing the metal tungsten film, turning off the tungsten target sputter power supply and closing the tungsten target baffle, introducing oxygen gas again, turning on the vanadium target sputter power supply and opening the vanadium target baffle and depositing the vanadium oxide film; and finally, carrying out in-situ annealing treatment on a composite film obtained through deposition.

The invention relates to a process for treating ammonia nitrogen wastewater by a gas-state membrane. The process comprises the following steps: adopting a composite discolouring agent and a heavy metal catcher to pre-treat high-concentration ammonia nitrogen wastewater, feeding high-concentration ammonia nitrogen wastewater into an air stripping tower to perform ammonia nitrogen removal, introducing stripped ammonia gas into a hydrochloric acid absorption tower to generate ammonium chloride; mixing stripped wastewater with low-concentration ammonia nitrogen wastewater to obtain waste liquor, regulating the pH value of the waste liquor to be 10.5 or more, performing ultrafiltration, introducing ultra-filtered waste liquor and absorbing liquor into the gas-state membrane assembly, controlling flow speed andthe temperature, removing ammonia nitrogen to obtain an ammonia salt solution and waste liquor with ammonia nitrogen content lower than 10 mg/L; feeding the ammonia salt solution to the air stripping tower after regulating the pH value, passing through the hydrochloric acid absorption tower to obtain ammonium chloride. The process has an ammonia nitrogen removal rate higher than 99%; the treated waste liquor meets discharge standards. In a process, the gas-state membrane is good in stability, does not generate osmotic distillation of water; and a gas-state membrane process canbe continuously performed, so that industrial implementation is facilitated.

The invention provides an article distribution method, a server and a distribution robot. The method comprises the following steps: when the server receives a distribution task, a robot capable of executing the distribution task is selected as a distribution robot, and a plurality of idle containers are selected as distribution containers in the containers of the distribution robot; the distribution task and the container information of a plurality of distribution containers are distributed to the distribution robot; the distribution robot loads articles through a plurality of the distributioncontainers corresponding to the plurality of the container information, and distributes the articles according to the distribution task. The invention distributes articles through a plurality of distribution containers, saves human cost, can simultaneously distribute a plurality of kinds of articles, and improves the distribution efficiency.