261results about How to "Increase shear stress" patented technology

An implantable stent having surface features adapted to promote an organized growth pattern of infiltrating cells when implanted in a tubular organ is provided. The surface features comprise depressions, pores, projections, pleats, channels or grooves in the stent body and are designed to increase turbulence or stagnation in the flow of a liquid, such as blood through the stent, and / or to promote the growth of infiltrating cells in an organized pattern. Alternatively, the invention stent can be populated with living cells prior to implant and can be heatable from an external source of energy, thereby inducing production of therapeutic bioactive agents from ingrowing cells. The invention also provides an implantable heatable stent for transcutaneously monitoring the flow of fluid through a lumen into which the stent is implanted by measuring the rate at which the heated stent cools in response to blood flow when the source of heat is removed.

Gelled organic compositions and methods for using same. The gelled compositions may be liquid organic fluids, such as gelled liquid hydrocarbons, formed from a mixture of an organic-base fluid, a carboxylic acid, and one or more metal source compounds, such as a metal salt of carboxylic acid. The gelled compositions may be used in variety of applications including, but not limited to, oil field, pipeline and processing facility applications.

An implantable stent having surface features adapted to promote an organized growth pattern of infiltrating cells when implanted in a tubular organ is provided. The surface features comprise depressions, pores, projections, pleats, channels or grooves in the stent body and are designed to increase turbulence or stagnation in the flow of a liquid, such as blood through the stent, and / or to promote the growth of infiltrating cells in an organized pattern. Alternatively, the invention stent can be populated with living cells prior to implant and can be heatable from an external source of energy, thereby inducing production of therapeutic bioactive agents from ingrowing cells. The invention also provides an implantable heatable stent for transcutaneously monitoring the flow of fluid through a lumen into which the stent is implanted by measuring the rate at which the heated stent cools in response to blood flow when the source of heat is removed.

A semiconductor mounting board 80 is prepared by electrically joining an IC chip 70 via an interposer 60 of high rigidity to external pads 41 and internal pads 43, which are formed on the uppermost surface of a build-up layer 30. When the IC chip 70 generates heat, since pads 41 are positioned away from the center, a large shearing stress is applied to the portions at which pads 41 are joined to the interposer 60 in comparison to the portions at which pads 43 are joined to the interposer 60. Here, pads 41 are formed at substantially flat wiring portions and thus when joined to the interposer 60 by means of solder bumps 51, voids and angled portions, at which stress tends to concentrate, are not formed in the interiors of solder bumps 51. The joining reliability is thus high.

A system and method of securing apparel to protective equipment is provided. In particular, the system includes an apparel attachment member defining a first side having an adhesive coating that secures the apparel attachment member to the protective equipment, and a second side having a plurality of hooks that removeably engage a plurality of loops located on the apparel.

Methods and devices relating to polymer-bioceramic composite implantable medical devices are disclosed.

A method for removing one or more strongly adsorbed components (SAC) from a process gas stream having SAC and other gaseous components adjusts the temperature of the SAC-laden process gas stream to be between about 80° and about 500° C. The temperature-adjusted process gas stream is contacted with a heat-exchange surface to transfer heat to an adsorbent, thus causing adsorbed SAC to be desorbed for collection, and to cool the process gas stream and remove any condensate from the cooled process gas stream. The cooled process gas stream is contacted with a cooled section of the adsorbent to adsorb SAC therefrom, producing a SAC-depleted process gas stream and a SAC-laden adsorbent. Desorbed SAC is withdrawn for collection and any adsorbent fines are withdrawing for collection.

A device, system, and method for direct delivery of a therapeutic to a target site that utilizes the non-Newtonian characteristics of shear thinning and shear thickening to allow easy passage of a therapeutic through a delivery lumen yet facilitate retention of the therapeutic in the target site. The device, system, and method includes increasing the shear rate or shear stress of a non-Newtonian fluid having therapeutic properties thereby increasing or decreasing the viscosity of the non-Newtonian fluid.

Apparatus for multiplying layers in a composite polymer stream includes an intermediate section having open conduits sandwiched between housing sections that close the conduits. The conduits have respective first stages separated by a first blade extending to a first face, and respective second stages separated by a second blade extending to a second face. The first stages separate the stream into sub-streams and compress and shift the sub-streams in a first dimension, whereas the second stages shift the sub-streams in a second dimension. In order to maintain a constant cross-sectional area of the sub-streams, the housing sections may be provided with complementary open channels. The apparatus can be used to multiply layers which are side-by-side or one-over-another by changing orientation in the direction of flow.

A body adapted for relative movement with respect to a fluid, said movement creating a flow of fluid with respect to the body in a relative flow direction, said body having at least one surface with a surface profile exposed to the fluid and comprising at least one smooth step facing in relative flow direction towards the flow, said step having a height between 4% and 30% of the local boundary layer thickness (δ99) of the fluid contacting the body in the vicinity of the step.

A non-toxic anti-fouling coating paste having a rheologic switching behavior based on a flow point, which can be set to the hydrodynamic and biological environmental conditions of a submarine component to be protected and which is between 5 Pa and 2,000 Pa above the wall shearing stress of the unfouled component to form a substrate which prevents colonization by marine fouling organisms.

The invention discloses a full-automatic descaling multi-effect evaporator, which comprises a heater and an evaporation chamber, wherein a granule distributor which can make fluid be distributed to tube nests of the heater uniformly is arranged at the bottom of the heater; and a granule separator is also arranged between the heater and the evaporation chamber. Due to the adoption of the technical scheme, the full-automatic descaling multi-effect evaporator has the advantages that a descaling process can be simplified, heat transfer is enhanced, and a heat transfer coefficient is increased, so that the evaporator can clean and remove scales online to realize continuous production. According to the optimized technical scheme, an intensifier ring is arranged in the granule separator, and a granule separation chamber and a granule storage chamber are also formed in the granule separator, so that liquid forms a vortex which rotates at high speed when passing through the cylindrical granule separation chamber under the action of centrifugal force formed by the intensifier ring to do circular rotary motion, so that granular solids are separated from the liquid quickly.

A process for devulcanization of vulcanized rubber, comprising the steps of: (a) preparing a mixture comprising: between about 5% w / w and about 50% w / w of thermoplastic polymer, between about 49% w / w and about 94% w / w of waste vulcanized rubber, and between about 0.01% w / w and about 1.8% w / w of stabilizing agent; and (b) kneading and desulfurizing the mixture by means of a co-rotating twin screw extruder at an extrusion temperature of between 150° C. and 320° C. to obtain devulcanized rubber. The devulcanized rubber is water-cooled, ground and dried or is rolled into sheet. This process combines the devulcanization, milling process and filtrating rubber as one process, possesses a higher devulcanization efficiency, treatment capability and lower energy consumption. Through the present invention, a controllable devulcanization process and a higher performance of the reformed materials with reclaimed rubber are achieved.

The invention is for the combination of EDTA, cystine, selenium, Vitamin C, Vitamin E, and zinc for anti-thrombotic effect and for the effect of restoring platelet aggregation, an integral component of thrombus formation, to normal and for the monitoring of the response to therapy with the combination. Methods for use of the components and method for performing the monitoring are included. The combination and method are particularly efficacious for vascular deficiency ailments including atherosclerotic vascular disease, reduction of ischemic cerebal event, complications from surgical procedures including restenosis, neurogenerative disease, and erectile disfunction, and vascular deficiency resulting from etiology of sepsis and chronic infection.

The invention discloses a radial extrusion type magnetorheological fluid brake, and belongs to the field of hydraulic resistance brakes. On the basis of an existing device, a right guiding magnetic brake outer shell, a pressurization device, a coil fixing ring, pressurization channels, a right magnet exciting coil and a separation magnet ring are added to the brake, wherein the right guiding magnetic brake outer shell is arranged on the right of a left guiding magnetic brake outer shell, a gap is reserved between the right guiding magnetic brake outer shell and the left guiding magnetic brake outer shell, and the pressurization device is arranged on the outer circumference of the right guiding magnetic brake outer shell; a magnetorheological fluid gap is formed between a driving shaft and the right guiding magnetic brake outer shell, the other magnetorheological fluid gap is formed between the driving shaft and the left guiding magnetic brake outer shell, and a left magnet exciting coil, the right magnet exciting coil and the separation magnet ring are arranged in the gap formed between the right guiding magnetic brake outer shell and the left guiding magnetic brake outer shell; and the left magnet exciting coil and the right magnet exciting coil are fixed through the coil fixing ring, the pressurization channels are respectively arranged on the right guiding magnetic brake outer shell, the coil fixing ring and the separation magnet ring. The radial extrusion type magnetorheological fluid brake is simple in assembling and compact in structure, provides large braking torque, meanwhile enhances device reliability, and reduces energy consumption.

The invention relates to a novel quasi-physiological pulsating flow environment arterial blood vessel tissue engineering reactor. The reactor comprises a liquid storage device 27, a liquid driver 21 and a blood vessel tissue dynamic culture chamber 25 which are sequentially connected through a fluid pipeline to form a fluid circulation loop, and a pulsation generator 24, wherein the liquid driver21 drives a liquid culture medium to circularly flow; the pulsation generator 24 forms the pulsation of the circularly flowing liquid culture medium and comprises a pulsation chamber 241 which is a closed chamber with fixed volume, a closed piston 244 in the pulsation chamber 241, a linear steeping motor 243 and a pull rod 242; the pull rod connects the closed piston 244 with a driving shaft of the linear stepping motor 243; and the closed chamber is communicated with the fluid pipeline above the culture chamber 25.

The invention pertains to the environmental protection technical field, and in particular relates to a continuous silk spraying vegetation method. The continuous silk spraying vegetation method is applied to a high and steep rock slope for the construction of vegetation layers. The invention is characterized in that the vegetation layers are formed by the continuous and synchronous spraying on bacteria soil base materials and long woven silks under high-pressure air, and the bacteria soil vegetation layer is provided with mutually entangled fiber meshes. The overlaying of a fiber net and the bacteria soil layer enhances shearing strength and dynamic stress resistance, which can closely and firmly contact with rock surfaces and enhance the anti-erosion performance, thus effectively preventing the failure of slope protection caused by rainwater erosion. The base material is bacteria soil containing compound microbial bacterial fertilizer, wherein, the compound microbial bacteria can activate the soil, promote the growth and extension of roots, organically integrate with the fiber net and the bacteria soil, realize interception, promote precipitation, achieve water conservation and prevent water and soil erosion.

The invention relates to magneto-rheological fluid with good settling agglomeration resistance. The magneto-rheological fluid comprises the following ingredients in parts by weight according to 100 volume parts: 125-225 parts of ferromagnetic particles, 30-85 parts of carrier fluid, 0.2-5 parts of xanthan gum, and 0-12.5 parts of additives, wherein the additives are a thixotropic agent, a dispersing agent, an antioxidant and a lubricant when the carrier fluid is water-based; and when the carrier fluid is oil-based, the additives are a thixotropic agent, a dispersing agent, and a lubricant. The magneto-rheological fluid is good in stability within a larger temperature range (minus 18 DEG C-130 DEG C), difficult to settle, and also keeps the original performances, namely high shearing stress and good friction property.

The present invention relates to methods and systems for cell lysis in a microfluidic device. More specifically, embodiments of the present invention relate to methods and systems for rapid continuous flow mechanical cell lysis. In one embodiment, a microfluidic device includes one or more microfluidic channels, each channel comprising constricted regions and non-constricted regions separating the constricted regions, wherein the constricted regions are configured to disrupt the cellular membranes of cells in fluid flowing through the one or more microfluidic channels.

The invention relates to a method for preparing an aluminum matrix composite, in particular to a method for preparing a graphene reinforced aluminum matrix composite by using graphite micro pieces as raw materials to solve the problems that current graphene reinforced aluminum matrix composites are high in cost, composite castings are poor in performance, and opening of graphene piece layers is insufficient. The preparation method comprises the steps of weighing, graphite micro piece dispersion and precast block forming, aluminum metal vacuum permeation, large plastic deformation treatment and component homogenization treatment. According to the method, the low-cost graphite micro pieces are used as the raw materials, a graphite micro piece reinforced aluminum matrix composite is firstly prepared, and the prepared few-layer graphene reinforced aluminum matrix composite is excellent in comprehensive performance, over 90 GPa in elastic modulus, over 400 MPa in tensible strength and over 230 W / (m.K) in heat conductivity. The method is applicable to preparing the graphene reinforced aluminum matrix composite.

In a continuous process for producing filler-containing silicone compositions (P), a silicone composition (E) comprising filler (F1) is mixed with filler (F2).

A squirrel-cage rotor of an asynchronous machine, in particular a die-cast rotor, includes a rotatable shaft, a laminated core being rotation-locked on the shaft and having grooves and opposing end faces. A squirrel-cage winding has rotor rods disposed in the grooves and a cage ring disposed on each of the end faces and electrically connecting the rotor rods. A pair of retaining elements is disposed on the shaft, wherein each retaining element extends in a radial direction in form of a disk or a spoke and has in an axial direction a wall and / or an axially extending finger. The wall overlaps on a radial periphery in the axial direction both the cage ring and a predefined axial section of the rotor rods that terminate in the cage ring, without increasing an external diameter of the laminated core.

Embodiments of the disclosure include systems and methods for capturing particular biological matter from a sample from an individual. The systems and methods employ an apparatus (such as a container that is a tube or bag) comprising a fluoropolymer coating that is modified to comprise one or more moieties for binding of a desired biological agents when a sample is exposed to the modified fluoropolymer. In particular aspects, the biological matter is a particular type of cell, such as a particular blood or bone marrow cell, and the desired cell is captured by means of an aptamer selected to bind the cell.

The invention relates to a magneto-rheological hydraulic brake executing device for electric vehicles and belongs to the technical field of electric vehicles. The magneto-rheological hydraulic brake executing device comprises a driving shaft, a brake disk, magneto-rheological liquid, a shell, an electromagnetic coil, connecting plates and a support structure from the inside to the outside. The driving shaft and the brake disk are fixedly connected with a spline and transmit torque to wheels. A left shell piece and a right shell piece are integrally connected through bolts, the brake disk is horizontally disposed in the shell, and the magneto-rheological liquid is filled into the shell. The electromagnetic coil takes an iron core as a support, is limited and fixed by bolts distributed on the support and fits with the outer surface of the shell to form a magnetic loop. The support structure comprises a left portion and a right portion, is fixedly connected with a car body, transmits brake force to the vehicle body, supports the electromagnetic coil through bolts and fixes the brake structure by bolts. The magneto-rheological hydraulic brake executing device is simple and compact in structure, accordant with requirements of the vehicles, capable of setting pressure at millisecond magnitude and convenient to adjust and can meet the requirements for brake strength of the vehicles.

The invention belongs to the technical field of mass transfer reaction equipment, and particularly relates to mass transfer and reaction equipment for a reverse airflow shearing and rotating packed bed which solves the problems of the existing ultragravity equipment in the aspect of air phase mass transfer. The mass transfer and reaction equipment comprises a rotating bed main body, an equipment bracket and a transmission device, wherein the rotating bed main body comprises an upper part and a lower part which are an air collection chamber and a main cavity; the main cavity is internally provided with a packing rotor capable of rotating at a high speed; the upper part of the main cavity is connected with an air inlet pipe; the bottom of the main cavity is connected with a drainage pipe; the center of the packing rotor is provided with a liquid distributor; the liquid distributor is connected with a liquid inlet pipe; the top of the air collection chamber is connected with an exhaust pipe; an opening in the top of the packing rotor is communicated with the air collection chamber. The mass transfer and reaction equipment has the beneficial effects that the shearing stress for fluid can be increased, more momentum is transferred to interior fluid by packing, the boundary layer separation of air liquid is promoted, the degree of turbulence is increased, and the update rate of air liquid interface is increased, and thus the purpose of strengthening the air phase mass transfer is achieved; the operation stability is improved, and the equipment is suitable for high throughput occasions; the air collection chamber effectively inhibits the influences on operation balance caused by entrainment and flooding.

The invention discloses a vascular tissue engineering reactor with rotation function. The reactor overcomes the disadvantages that the common arterial tissue engineering reactors can not simultaneously supply the vascular tissue with the culture conditions of intravascular perfusion and vascular rotation, and the mass transfer performance is poor. The vascular tissue engineering reactor comprises a liquid storage bottle, a liquid driving device, a vascular tissue culture cavity, a linear motor, a step motor, a vascular tissue transmission device, and the like, realizes the vascular tissue rotation in the course of intravascular perfusion culture, and has good mass transfer performance.

A rotor / stator type mixer implements the particle size breakup apparatus and includes a stator having a plurality of openings formed thereon and a rotor disposed on the inside of the stator and spaced away from the stator with a specific gap. The rotor, which is disposed inwardly of the stator having the plurality of openings formed thereon so that it can be spaced away from the stator with the specific gap, has a rotor peripheral wall that faces opposite the inside of the stator peripheral wall and is disposed inwardly radially of the peripheral wall of the stator having the plurality of openings formed thereon so that it can be spaced away from the stator with the specific gap. In addition, the rotor has a plurality of openings formed thereon.