245 results about "Micro perforated plate" patented technology

A laboratory automation system that is capable of carrying out clinical chemistry assays, immunoassays, amplification of nucleic acid assays, and any combination of the foregoing, said laboratory automation system employing at least one of micro-well plates and deep multi-well plates as reaction vessels. The use of micro-well plates as reaction vessels enables the laboratory automation system to assume a variety of arrangements, i.e., the laboratory automation system can comprise a variety of functional modules that can be arranged in various ways. In order to effectively carry out immunoassays by means of micro-well plates, a technique known as inverse magnetic particle processing can be used to transfer the product(s) of immunoassays from one micro-well of a micro-well plate to another.

An acoustic metamaterial layered composite for noise control may include a plurality of micro-perforated plates alternately and periodically arranged with a plurality of absorbent layers and optional air gaps. The plurality of micro-perforated plates may be in a form of a periodically arranged stack and include perforations extending therethrough. Each of the plurality of absorbent layers is formed of a poroelastic material. The metamaterial layered composite noise control device is designed using the metamaterial acoustics transformation approach for optimized noise control.

The invention relates to a sound-insulating, ventilating and heat transfer enhancing acoustic metamaterial structural unit, which comprises a frame, wherein a restraining body is arranged inside the frame, and at least one of the upper and lower surfaces of the frame is coated with a thin film; and at least one hole is formed in the restraining body and the thin film. In addition, the invention provides an acoustic metamaterial composite plate and an acoustic metamaterial composite structure comprising the acoustic metamaterial structural unit, as well as a frequency modulation method and an assembly method. The acoustic metamaterial structural unit has sound insulation capability superior to that of an ordinary perforated plate or micro-perforated plate within a broadband, can ensure that sufficient heat flow, air flow or liquid flow can pass through smoothly, and increases heat diffusion rate of fluid media on both sides of holes and accelerates heat convection efficiency through unit localized vibration generated by the structure under excitation of acoustic waves. The acoustic metamaterial structural unit and the array composite structure have the advantages of simple assembly technology and stable working performance.

The invention relates to a micro-perforated plate with a resonant sound absorption structure. The micro-perforated plate with the resonant sound absorption structure is characterized by comprising a rigid wall, a micro-perforated plate and a cavity which is formed between the rigid wall and the micro-perforated plate, wherein the two ends of the rigid wall are connected with the two ends of the micro-perforated plate through a flexible or elastic material respectively. In the sound wave absorption process of the micro-perforated plate with the resonant sound absorption structure, the distancebetween the micro-perforated plate and the rigid wall can be automatically adjusted and a semi-active resonant sound absorption structure is formed in the cavity between the micro-perforated plate and the rigid wall along with the variation of sound wave frequency and the influence of vibrating air flow. Therefore, the micro-perforated plate with the resonant sound absorption structure has highersound absorption performance in a wider frequency range, the sound absorption frequency band of the micro-perforated plate with the resonant sound absorption structure is greatly expanded, and the defect of a narrower sound absorption frequency band of a sound absorber of the micro-perforated plate with a rigid structure can be overcome. The micro-perforated plate with the resonant sound absorption structure can be widely used for the sound absorber, mufflers and various sound absorption and insulation structures to treat a noise environment caused by air power noise.

A micro well plate is described for capturing and distributing single cells in individual wells is described, wherein at least one individual well is provided with a bottom plate having at least one pore to pass sample liquid, such that if one object or cell of interest is collected on the bottom plate of the well, the sample flow rate through that particular well is significantly reduced, minimizing the possibility that multiple cells or objects of interest entering the same well. The presented invention is particularly suited for obtaining single cells and/or microorganisms suspended in fluid samples for subsequent detailed interrogation.

The invention discloses a broadband micro-perforated board sound absorber, a sound absorber performance prediction method and a sound absorber structure design method. The sound absorber comprises a surface micro-perforated board and a back chamber with unequal periodicity depth, and the back chamber is used for expanding sound absorption bandwidth of the sound absorber. The performance prediction method is used for predicting a sound absorption coefficient frequency spectrum of the sound absorber, through finite element simulation and experiment measurement verification, the performance prediction method is accurate and reliable; the structure design method used for effectively realizing the broadband micro-perforated board sound absorber comprises steps that (1), a depth matrix of the periodic back chamber is designed on the basis of the secondary residual sequence combination arrangement theory; and (2), evaluation is realized on the basis of the performance prediction method, combination of parameters of the sound absorber are sequentially determined, including total sound absorber width of the periodic back chamber, depth of each sub back chamber, board thickness of the micro-perforated board, aperture and perforated percentage. Through the sound absorber performance prediction method and the sound absorber structure design method, the micro-perforated board sound absorber having the broadband sound absorption performance can be accurately, reliably and simply designed.

The invention discloses a tubular type micro air bubble generator. The tubular type micro air bubble generator is arranged in a water purifying pipeline, and comprises a water intake assembly (1), anannular air injection mechanism (2) and an air bubble breaking mechanism (3) which are sequentially connected and coaxially arranged, wherein the annular air injection mechanism (2) comprises an air injection pipe (21), an outer ring (22), an inner ring (23) and a connecting pipe (24); the inner ring (23) and the outer ring (22) are arranged in a concentric way; the outer ring (22) is of a cavitystructure; the inner ring (23) is of a ring cavity (233) with a side opening; a micro-pore plate (232) is arranged at the side opening of the inner ring (23); the outer wall of a cavity of the outer ring (22) is communicated with the air injection pipe (21), and the inner wall of the cavity of the outer ring (22) is communicated with the ring cavity (233) of the inner ring (22) through the connecting pipe (24). The tubular type micro air bubble generator has the advantages that the structure is compact, the operation is simple, the maintenance cost is low, and the micro air bubbles with different particle sizes can be produced.

Microplates having a body defining a plurality of wells, wherein the wells have at least one bottom portion configured to allow the sample to be analyzed by various methods in situ with minimized background interference in the data obtained, and methods of using the same, are disclosed. The improved microplate may also have wells having certain shapes and/or sizes to allow the sample to be analyzed with minimized background interference in the data obtained. A system for obtaining high-quality XRPD or Raman data is also disclosed.

The invention provides a composite material silencing and noise-reducing acoustic liner and a preparation method thereof, belongs to the technical field of structural/functional integrated composite material molding, and mainly relates to a composite material microporous panel honeycomb sandwich structure silencing and noise-reducing acoustic liner assembly, a molding process method and applications thereof, specifically to layer spreading of aramid fiber and glass fiber reinforced epoxy resin-based composite prepreg, application of a polymer acoustic separation membrane material, and hot press tank curing molding. According to the present invention, a large number of micro-pores are processed on the composite material layer plate through the laser processing method; and the Nomex aramid paper honeycomb core, the composite material panel and the back plate are adhered and cured by the film-like adhesive to form the micro perforated plate composite material silencing and noise-reducingacoustic liner, wherein the silencing and noise-reducing acoustic liner can be the single-freedom-degree acoustic liner structure and the multi-freedom-degree acoustic liner structure, and can achievethe acoustic noise reduction function of aero engines.

The invention relates to a biochip and a production method thereof, the biochip adopts a microporous plate as a chip barrier, the bottom of each pore of the microporous plate is coated with a coating layer, and a probe which crossbreeds with a substance to be detected is fixed on the coating layer. As the coating layers are fixed at the bottoms of the plastic pores of the microporous plate used by ELISA and are dotted and provided with probe molecules, compared with the traditional biochip made of glass materials, as the adsorptivity between plastics and the coating layers is good, the probe molecules are not easy to fall off, simultaneously, the chip is not easily broken, the sample to be detected is not easily lost, and the experimental result is more reliable and stable.

The invention discloses a low-frequency coupling sound absorbing structure, comprising a peripheral cavity, a resonant cavity arranged in the peripheral cavity and an extension pipe structure arrangedin the resonant cavity. One end of the extension pipe structure is connected with the cavity wall of the resonant cavity through a corresponding through hole. The peripheral cavity comprises a micro-perforated plate, a back plate, a first side plate and a second side plate. The micro-perforated plate is provided with a plurality of micro-hole structures, the micro-perforated plate is arranged corresponding to the back plate, and the first side plate and the second side plate are arranged corresponding to the back plate. The low-frequency coupling sound absorbing structure in the present invention can increase the acoustic impedance of the sound absorbing structure by arranging a resonant cavity with an elongated tube structure in the peripheral cavity with the microporous structure, thereby facilitating the sound absorbing coefficient to be increased and the sound absorbing band to be widened, shifting the sound absorbing band to the low frequency, thereby realizing the low-frequencysound absorbing and contributing to the improvement of the product performance.

PURPOSE: A sound absorption panel is provided to isolate the diffusion of flames and to increase the sound absorption property by filling a coated honeycomb between a base plate and a perforated plate. CONSTITUTION: A base plate member(10) is formed in a plate shape with a certain size. A honeycomb(20) is formed by many honeycomb shaped cells and installed in the upper part of the base plate member with a certain thickness. A perforated plate member(30) is formed by a plate shape having many holes(31) and loaded on the upper part of the honeycomb. A side plate member(40) shields the perforated plate member and the base plate member, the honeycomb is located between the perforated plate member and the base plate member. Thereby, the sound absorption property is increased without a glass fiber, a rock wool or a foam.

The invention relates to the field of acoustic panel absorber and discloses a composite sound absorption structure based on combination of a micro-perforated board with an acoustic metamaterial. The composite sound absorption structure comprises a cover plate, side plates, a bottom plate, thin-film units, separation racks and mass blocks. The cover plate and the bottom plate are opposite to each other at an interval; and the side plates are connected with the cover plate and the bottom plate tightly to form a sound absorption back cavity. A plurality of micro sound absorbing holes and a plurality of unit holes are formed in the cover plate; one thin-film unit and one separation racks are arranged in each unit hole; and the thin-film units are fixed at the separation racks. The separation racks separate the unit holes into a plurality of cells. Each mass block is attached to the thin-film unit of one cell in each unit hole. Therefore, the sound absorption bandwidth can be broadened on the premise that the complexity of the sound absorption structure of the micro-perforated board is not increased; and thus the sound absorption effect can be enhanced.

The invention discloses a wide band sound absorption structure of film mechanical impedance combined with micropunched plate acoustic impedance, which comprises an upper support and a lower support which are fixedly and perpendicularly connected with a wall. A front micropunched plate and a rear micropunched plate are fixedly and perpendicularly connected between the two supports. A rectangular cavity is formed respectively between the front micropunched plate and the rear micropunched plate and between the rear micropunched plate and the wall. In the rectangular cavity formed by the rear micropunched plate and the wall, the inner side faces of the two supports are respectively and fixedly connected with a groove structure with the front face of a groove mouth facing the rear micropunchedplate in a vertically symmetrical mode. An elastic ring is closely bonded in the groove mouth of the groove structure in an adhesive mode and bonded with a composite film in an adhesive mode, and thecomposite film is formed by evenly pasting an elastic film and a sound insulation film. A mechanical impedance unit formed by films is added in a rear cavity. The micropunched plate is combined with mechanical impedance of films, the micropunched plate structure is utilized to absorb sound energy at middle and high band, and mechanical impedance of films is utilized to absorb sound energy for lowfrequency. The broadband sound absorption structure has the advantage that sound absorption frequency band is wide.

A high-density high-throughput microplate and methods for simultaneously screening a plurality of protein crystallization solutions and for producing diffraction quality protein crystals in a vapor-diffusion environment are disclosed. The microplate has defined side-by-side paired chambers of equal size, wherein the side-by-side paired chambers have a maximum volume of about 8 μl, and wherein the paired chambers have a vapor channel, therein providing vapor exchange between the side-by-side paired chambers. The microplate further includes a membrane to seal the surface of the microplate. The microplate is adapted to receive a crystallization solution in one of the side-by-side paired chambers and a protein solution in the other of the side-by-side paired chambers, wherein the protein solution and the crystallization solution interact via a vapor diffusion process, which enables the formation of protein crystals within the chamber that contains the protein solution.

The invention relates to an electrooxidation ozone generator. The electrooxidation ozone generator comprises a housing forming an electrolytic tank, and a core part of an electrolytic electrode; the core part of the electrolytic electrode comprises an anode membrane-permeation electrode, a cathode membrane-permeation electrode, and an ion exchange membrane pasted between the anode membrane-permeation electrode and the cathode membrane-permeation electrode; the anode membrane-permeation electrode comprises a microporous plate base layer, an interlayer coated on the base layer, and a multifunctional dynamic membrane layer disposed on the interlayer surface; the cathode membrane-permeation electrode comprises a microporous plate base layer, an interlayer coated on the base layer, and a multifunctional dynamic membrane layer disposed on the interlayer surface, or comprises a microporous plate base layer and a multifunctional dynamic membrane layer disposed on the microporous plate base layer surface. The electrooxidation ozone generator comprises the following characteristics: firstly, by using the membrane-permeation electrodes with selective permeation effect, the permeation of raw material liquid to a catalyst side is controlled effectively; balanced bidirectional permeation effect is realized; the electric resistance and energy consumption of the generator are reduced; and the efficiency is improved. Secondly, with a controllable internal-pressure structure and self-balanced gas phase transmission channels, electrode reactions are ensured to be carried out at a controllable pressure; gas dissolved out from the anode has an ozone concentration of more than 20%; and the ozone generation efficiency is high. Thirdly, the generator has the characteristics of simple manufacturing and low cost.

The invention discloses a particle board resonance sound absorption structure. The particle board resonance sound absorption structure comprises pore plates and a bottom plate located behind the pore plates. Cavities between the bottom plate and the pore plates form the resonance sound absorption structure. The pore plates are particle sound absorption plates. The particle sound absorption plates comprise particles and binding agents. The outer surfaces of the particles are covered with the binding agents to form binding agent layers. Gaps between the particles covered with the binding agents form sound absorption pores. The particle board resonance sound absorption structure can be of a single-layer structure or a double-layer structure or a multilayer structure. The sound absorption performance of the resonance sound absorption structure can be correspondingly influenced by changing the particle sizes of the particle sound absorption plates; the actual measurement performance of the resonance sound absorption structure is approximate to the theoretical sound absorption characteristics of a micro perforated board sound absorption structure with the same parameters, so the corresponding particle board resonance sound absorption structure can be designed according to the application environment. The particle board resonance sound absorption structure is large in sound absorption coefficient, wide in sound absorption frequency band, simple in manufacturing process and capable of being widely applied to various noise control fields such as indoor sound absorption treatment, industrial noise control and railway sound barriers.

A microplate for polymerase chain reaction (PCR) comprises a substrate having a metallic material for heating PCR samples, and a barrier layer disposed adjacent to the substrate. In some cases, the barrier layer is formed of a first polymeric material. The microplate includes one or more wells for containing PCR samples. The one or more wells are formed of a second polymeric material sealed to the barrier layer. In some cases, the substrate can provide a PCR ramp rate of at least about 5° C./second.

The invention discloses a porous glass plate and structures adopting the porous glass plate, which adopt the technical scheme that: the porous glass plate is provided with pores, the pores are perforated in a thickness direction and are in regular or irregular distribution in a plane direction, the opening ratio is more than or equal to 0.5 percent and is less than or equal to 60 percent, and thepores are circular or in any shape; and the structures adopting the porous glass plate comprise building and structure windows adopting the porous glass plate, vehicle windows adopting the porous glass plate, enclosures adopting the porous glass plate, sound barriers adopting the porous glass plate, totally enclosed structures of traffic passages adopting the porous glass plate, and paravents adopting the porous glass plate. The porous glass plate has the advantages of having air permeability and being favorable for the ventilation, having the sound-absorbing effect of a perforated plate and amicroperforated plate and certain sound insulation effect, having the effects of keeping out the wind and reducing the wind pressure, and having the rainproof and antitheft effects. The porous glassplate is applicable to windows or glass curtain walls of buildings and structures, vehicle windows, enclosures, sound barriers, enclosed structures of traffic passages and paravents.

The invention discloses a micropore plate sampling indication device which comprises a cuboid sampling base. The sampling base is provided with a cuboid sampling groove; the sampling groove is internally provided with a plurality of indicator lights which correspond to micropore plate holes one by one; row selection buttons are respectively arranged at the two sides of the sampling groove, and the number of the row selection buttons corresponds to that of the rows of the micropore plate holes; the lower part of the sampling groove is provided with line selection buttons, and the number of the line selection buttons corresponds to that of the lines of the micropore plate holes; and the sampling base is also provided with a functional button used for turning off the indicator lights. When the micropore plate sampling indication device is in use, a micropore plate is arranged on the indicator lights, the micropore plate holes are aligned to all the double-color light-emitting diode (LED) indicator lights, and the holes in which samples are added or are not added can be clearly indicated in the sampling process by the combined control of the row selection buttons, the line selection buttons and the functional button; and the row selection buttons, the line selection buttons and the functional button respectively have a sinking design, so that the error touch phenomena can be reduced in the sampling process, and the sampling error rate is greatly reduced.

The invention relates to the sound absorption technical field, particularly to a composite sound absorption plate. The composite sound absorption plate comprises a micro perforation plate and a base body which are arranged in an attached mode; the micro perforation plate is provided with a plurality of through sound absorption holes; the base body is provided with a plurality of sound absorption empty chambers; a communication channel is formed between every two adjacent sound absorption empty chambers; the surface of the base body, which is provided with the sound absorption empty chambers, is attached to the micro perforation plate; every sound absorption hole formed in the micro perforation plate is communicated with the corresponding sound absorption empty chamber formed in the base body. Compared with the prior art, the micro perforation plate, the sound absorption empty chambers and the communication channel formed between every two adjacent sound absorption empty chambers can effectively participate in energy consumption and sound absorption, the energy consumption effect is achieved through the resonance sound absorption principle of the micro perforation plate and the sound absorption empty chambers, and accordingly the sound absorption effect of the structure can be particularly significant and meanwhile the sound absorption structure is located on the base body and the micro perforation plate and accordingly the separated independent machining can be performed, the manufacturability is good, and the production cost can be controlled.

The invention relates to an analyzing method for detecting activity of soil xylanase, which comprises the following steps: firstly, weighting n sieved air dry soil samples into n thick test tubes, adding acetic acid buffer solution into each test tube, oscillating by a vortex oscillator, getting soil suspension into 96 micropore plates under the oscillation condition, adding 4-MUB-7-Beta-D-xyloside substrate solution into n-1 holes, and adding water with equal quantity into the other one hole so as to be used as non-substrate contrast, adding substrate solution with equal quantity and water with equal quantity into the (n+1)th hole so as to be used as soli-free contrast, oscillating and culturing under constant temperature; secondly, adding NaOH into the micropore plates to terminate the reaction after the culture is finished; thirdly, performing the fluorimetric determination to resultant of reaction by a multifunctional microplate reader; and fourthly, calculating the activity of the xylanase. Compared with the traditional method, the invention shortens the culture time, omits the operation procedures of filtration, and the like, and simplifies the operation steps; meanwhile, the determination data of fluorescent materials in the micropore plate can be obtained within 15s through the multifunctional microplate reader, huge samples are allowed to be simultaneously determined; and moreover, the invention has high accuracy and easy operation, stable and reliable result and good reproduction quality.