658results about "Centrifugal force sediment separation" patented technology

Disclosed herein are methods and compositions for identifying and / or treating subjects having or likely to have amyotrophic lateral sclerosis (ALS) or frontotemporal dementia (FTD). Antibodies specific for one or more di-amino acid repeat-containing proteins are also provided herein.

The invention belongs to the technical field of oil exploitation, and particularly relates to an oil exploitation device with a gravel filtering function. The oil exploitation device comprises a collecting frame, the inner bottom wall of the collecting frame is fixedly connected with a filtering cylinder through a supporting rod, the upper end of the filtering cylinder is fixedly communicated with two oil conveying pipes, and the two oil conveying pipes are both in butt joint with an oil pipeline; and the centrifugal separation mechanism is used for achieving separation of petroleum and gravel through the effect of centrifugal force, the centrifugal separation mechanism comprises filtering holes formed in the peripheral side wall of the filtering cylinder, and a rotational flow block is rotationally installed in the filtering cylinder. Through the arrangement of the centrifugal separation mechanism and the design that the upper portion of a rotational flow block is inclined and contracts inwards, mixed fluid is guided to form spirally-descending rotational flow, and petroleum is rapidly separated through filtering holes through centrifugal force; and by arranging the gravel conveying mechanism, a separation-conveying continuous operation chain is formed, and the blocking risk caused by gravel accumulation is thoroughly eliminated.

The present invention relates to the field of wastewater treatment technology, and more particularly to a process and apparatus for separating and recovering chromium and lead ions from wastewater. The apparatus comprises a flotation sedimentation tank equipped with an inlet pipe and a drain pipe, a feeding mechanism, and a dispersion mechanism. The flotation sedimentation tank is used to receive the wastewater to be treated. The feeding mechanism is disposed within the flotation sedimentation tank and is used to inject a reactant, a collector, and aeration gas into the flotation sedimentation tank. The dispersion mechanism is connected to the feeding mechanism and is used to disperse the reactant, collector, and aeration gas within the flotation sedimentation tank so that they come into full contact with the wastewater. The process comprises: introducing a reactant into the wastewater to cause the chromium ions and lead ions to react, respectively, to produce a chromium precipitate and a lead precipitate; introducing a collector into the wastewater to cause the lead precipitate to combine with the collector to impart hydrophobicity; aerating the wastewater to cause the lead precipitate to form froth; and separating and recovering the froth from the chromium precipitate. The present invention can achieve simultaneous separation and recovery of chromium and lead ions from wastewater, achieving high separation and recovery rates.

The invention discloses a stirring and separating device for aerogel preparation, and relates to the technical field of aerogel preparation, the stirring and separating device comprises a stirring tank, a centrifugal assembly and a stirring assembly, the stirring tank is internally provided with the centrifugal assembly, and the bottom end of the centrifugal assembly is fixedly connected with the stirring assembly; the stirring assembly comprises a stirring assembly arranged in the stirring tank, and a driving assembly is arranged at the top end of the stirring assembly; the centrifugal assembly comprises a separation assembly, and an adjusting assembly is arranged on the side face of the separation assembly. According to the aerogel preparation device, uniform stirring and impurity cleaning in the aerogel preparation process can be achieved, and the aerogel production efficiency is reduced.

The invention relates to the technical field of wastewater treatment, in particular to a process and device for separating and recycling chromium and lead ions in wastewater, the device comprises a flotation sedimentation tank provided with a water inlet pipe and a water outlet pipe, a feeding mechanism and a dispersing mechanism, the flotation sedimentation tank is used for containing wastewater to be treated, and the feeding mechanism is arranged in the flotation sedimentation tank; the feeding mechanism is connected with the flotation sedimentation tank and used for injecting reactants, collecting agents and aeration gas into the flotation sedimentation tank, and the dispersing mechanism is connected with the feeding mechanism and used for dispersing the reactants, the collecting agents and the aeration gas into the flotation sedimentation tank to make full contact with wastewater. The process comprises the following steps: introducing a reactant into the wastewater, so that chromium ions and lead ions respectively react to generate a chromium precipitate and a lead precipitate; a collecting agent is introduced into the wastewater, so that the lead precipitate is combined with the collecting agent to obtain hydrophobicity; aerating the wastewater to enable the lead precipitate to form floating foam; and separating and recovering the floating foam and the chromium precipitate. The method can realize synchronous separation and recovery of chromium and lead ions in wastewater, and is high in separation rate and recovery rate.

The invention relates to the technical field of rotational flow desilting devices, and particularly discloses a rotational flow desilting device for hydraulic engineering, which comprises a rotational flow desilting cylinder, a rotational flow assembly, a sand-water separation assembly, a conveying assembly and a control management unit, a discharging pipe is fixedly connected to the bottom of the rotational flow desilting cylinder, a control valve is fixedly connected to the interior of the discharging pipe, an electric valve is fixedly connected to the interior of the water inlet pipe, and the control management unit is used for monitoring and analyzing the running state of the rotational flow desilting cylinder in real time. According to the invention, through the arrangement of the control management unit, the traditional extensive mode depending on artificial experience judgment can be changed, so that the equipment operation information can be obtained more comprehensively, timely and accurately. Based on the data, different working conditions can be accurately identified, a basis is provided for parameter optimization, and the problem that traditional fixed parameter control cannot adapt to sewage characteristic changes is solved.

This invention discloses an air-lift cyclone sand separator, comprising a sedimentation tank and an air-lift device. The sedimentation tank has a sand-collecting hopper at its lower end, and a hollow shaft extending vertically is placed inside the sedimentation tank. A paddle is fixed to the lower end of the hollow shaft at the upper opening of the sand-collecting hopper. A driving device is fixed to the upper end of the sedimentation tank and connected to the upper end of the hollow shaft. The air-lift device includes an air-lift tank, an air-lift pipe, an air-purge pipe, and a sand-discharge pipe. The air-lift tank is housed within and communicates with the sand-collecting hopper. The air-lift pipe passes through the hollow shaft and communicates with the air-lift tank. The air-purge pipe passes through the hollow shaft and communicates with the sand-collecting hopper. The sand-discharge pipe passes through the hollow shaft and communicates with the air-lift tank. The paddle accelerates the rotation speed of the water flow in the sedimentation tank, allowing the sand to settle better. The settled sand is concentrated in the sand-discharge hopper. The air-lift pipe drives the water flow through the air-lift tank and into the sand-discharge pipe. The air-purge pipe disperses the sand in the sand-collecting hopper, allowing the dispersed sand to enter the sand-discharge pipe with the water flow, resulting in good sand removal efficiency.

This disclosure describes methods to separate solids from liquids in a production facility. A process separates components in the process stream by applying non-condensable media to create density differences and then using a mechanical device to separate the solids from the liquids based on the density difference. The process produces the liquids and solids, which may be further processed to create valuable animal feed products.

The utility model discloses a liquid-phase synthesis system of lithium sulfide. Comprising a first lithium sulfate dissolving device, a first barium sulfide dissolving device, a chemical combination reaction device, a first separation device and a second separation device, the liquid phase after-treatment unit is used for concentrating, purifying and drying the liquid phase to obtain lithium sulfide, and the solid phase after-treatment unit is used for washing and drying the solid phase to obtain barium sulfate; the first lithium sulfate dissolving device and the first barium sulfide dissolving device are both connected with a raw material inlet of the combination reaction device; and a reaction product outlet of the combination reaction device is connected with the first separation device. The liquid-phase synthesis system of the lithium sulfide has the advantages that products are easy to separate, the purity of the lithium sulfide products is high, the liquid-phase synthesis system of the lithium sulfide is very suitable for industrial-scale production, and the produced high-purity anhydrous lithium sulfide is very suitable for solid-state battery anode materials and has huge potential economic benefits.

The invention relates to a method for extracting and separating polyether polyol in waste salt slag by a water-based method, and belongs to the technical field of separation and purification. The method comprises the following steps: (1) slurrying extraction: mixing polyether polyol salt slag with water according to a certain mass ratio, and carrying out slurrying extraction under a stirring condition to obtain oil-water-salt mixed slurry; (2) performing centrifugal separation to obtain an oil-water mixture rich in polyether polyol; (3) demulsifying and layering to obtain a polyether polyol phase; and (4) refining and purifying: dehydrating the polyether polyol phase to obtain a recycled polyether polyol product. According to the method, water is used as an extraction solvent, so that the use of toxic and flammable organic solvents is completely avoided, the safety and health hidden dangers are fundamentally eliminated, and secondary organic pollution is avoided. By optimizing parameters such as the temperature and the liquid-solid ratio of extraction water and combining centrifugal separation, the polyether polyol can be efficiently extracted and separated from the thick salt slag, and the recovery rate can reach 95% or above.

The invention relates to the technical field of sewage treatment, in particular to an assembly type stacked hydraulic grit chamber for a sewage treatment plant. The assembly type stacked disc hydraulic grit chamber for the sewage treatment plant comprises a stacked disc module device, an unpowered water distribution device and a backwashing and fluidizing device, the stacked disc module device comprises a plurality of stacked discs which are sequentially arranged at intervals in the vertical direction, a water outlet channel is formed between every two adjacent stacked discs, and a water outlet is formed in the inner side of each stacked disc. According to the assembly type stacked disc hydraulic grit chamber for the sewage treatment plant, water flow is sprayed to the inner surface of the stacked disc through the cleaning disc assembly so as to wash the inner surface of the stacked disc, the automatic backwashing function is achieved, the problem of sand accumulation of the stacked disc is effectively solved, and sand hardening is prevented. Through the automatic backwashing function, the manual cleaning frequency and strength are greatly reduced, the manual labor intensity and potential safety hazards are reduced, the stacked trays are prevented from being blocked, and the service life of the stacked trays is prolonged.

The disclosure relates to the purification and treatment of oil produced from the liquefaction of waste polymer like for instance the pyrolysis of waste plastic via the polymerization of dienes prior to further treatments.

Some embodiments of the technology disclosed herein relate to a system having a hydrodynamic separator element defining an element inlet and an element outlet. The element outlet has a first element outlet and a second element outlet. The hydrodynamic separator element has a plurality of curved microfluidic channels in fluid communication. Each of the plurality of microfluidic channels are arranged to operate in parallel. Each microfluidic channel defines a channel inlet downstream of the element inlet and a channel outlet having a first channel outlet upstream of the first element outlet and a second channel outlet upstream of the second element outlet. A flow characteristic sensor is in sensing communication with the separator element. A controller is in data communication with the flow characteristic sensor, where the controller is configured to provide a first alert upon the flow characteristic being outside a first threshold.

A device for recovering entrained organic particles from an aqueous solution is provided. The device comprises a tank configured to receive a mixed solution through an inlet, wherein the mixed solution comprises an aqueous solution and organic particles, a plurality of curved impellers configured to impel a torque on the mixed solution, wherein in response to receiving the torque the mixed solution moves in a rotational motion within the tank, a deflector wall coupled to the floor extending vertically from the floor and surrounding the plurality of curved impellers to form an inner well configured to direct a flow of the rotating mixed solution towards a top surface of the tank, and a skim launder coupled to a boundary wall of the tank and positioned at the top surface, wherein the skim launder is configured to recover organic particles from the tank as they separate from the aqueous solution.

A hydrodynamic separator is configured to separate a liquid having dispersed particles. The separator has a substrate and a liquid channel defined by the substrate, where the liquid channel is configured to receive a liquid having a Reynolds number (Re) within the channel. The liquid channel has an inlet and an outlet and is curved to define an inner radius (RC). The liquid channel has a liquid channel length (LD) along the curve and a rectangular cross-section along the length of the curve, where the rectangular cross-section has a height, a width (w), and a hydraulic diameter (DH). The liquid channel length (LD) is greater than or equal to a linear focusing length (Lf), andLf=1598.8Rc⁢α⁢w2Re⁢DH3+6.4,where a is the particle diameter. The liquid channel length (LD) is greater than or equal to a linear focusing length (Lf), andLf=1⁢5⁢6.2⁢RcRe ⁢(wDH)2+24.3.In various embodiments the liquid channel length (LD) is greater than or equal to a linear focusing length (Lf), andLf=Re⁢w28⁢DH+2⁢4.3.

The invention discloses a flocculation cyclone, and relates to the technical field of water treatment, the flocculation cyclone comprises cyclone barrels, top openings are formed in the exteriors of the cyclone barrels at the foremost end and the tail end, and a bottom opening and a top opening are formed in the exterior of the cyclone barrel at the middle part; tangent water inlet flow regulation and control mechanisms are installed between every two adjacent sets of bottom openings and between every two adjacent sets of top openings. The bottom of the inner side of the rotational flow barrel is fixedly connected with a mud return cone, the outer part of the rotational flow barrel at the tail end is fixedly connected with a sedimentation tank, and the inner side of the rotational flow barrel at the tail end is provided with a flow breaking mechanism. The device adopts a plurality of groups of rotational flow barrel arrays, flow is regulated through a tangential water inlet regulation and control mechanism, high-shear gradient rotational flow is formed, a mud return cone returns settled flocculate with a speed gradient of zero to a high-shear gradient area, collision of the flocculate is promoted to be increased, the coagulation efficiency is improved, a flow breaking mechanism enhances the flocculation effect, and the device is suitable for high and low flow working conditions, and has a good application prospect. The agent dosage and the dredging frequency are reduced, and the water treatment efficiency is optimized.

The present invention relates to the technical field of preparation of food and cosmetic raw materials. Disclosed are an antioxidant repair Ganoderma lucidum extract and a preparation method therefor. The preparation method comprises: mixing crushed fruit body of Ganoderma lucidum with pure water, and heating and dynamically extracting to obtain a crude extract; standing the obtained crude extract, naturally settling, filtering a supernatant by using a screen mesh, and collecting a crude filtrate; using a disc stack centrifuge to perform secondary impurity removal on the obtained crude filtrate so as to obtain a filtrate; performing fine filtration by using a ceramic membrane having a pore diameter of 400-1200 nm, and collecting a permeate; and finally, concentrating and drying to obtain an antioxidant repair Ganoderma lucidum extract. The preparation method of the present invention is simple to operate and low in cost, and has the advantage of large scale. The finished product is high in controllability and stability, and the Ganoderma lucidum extract which is wide in application and good in effect can be provided for the industries of food, health food, and cosmetics.

The utility model discloses a high-precision multilayer hydraulic cyclone desanding device which comprises a concrete pool body and a water inlet, the water inlet is located in the concrete pool body, one end of the water inlet is fixedly connected with a water distribution port, the end, away from the water inlet, of the water distribution port is fixedly connected with stacked discs, and the stacked discs are connected through stacked disc fixing pieces. The side, away from the stacking disc, of the stacking disc fixing piece is connected with a mounting frame, the top end of the mounting frame is fixedly connected with a mounting support, and a flushing system is arranged on the mounting frame. The bottom of the mounting bracket is connected with the whole desanding device, four mounting support legs are arranged on the periphery of the mounting bracket, the mounting support legs are connected with the concrete pool wall, in order to adapt to construction errors of the concrete pool wall, the mounting bracket can realize an adjusting space of + / -8cm, and in order to adapt to the shape of the concrete pool wall, the mounting support legs and the mounting bracket can realize 180-degree angle adjustment.

Per- and polyfluoroalkyl substances (PFAS) are destroyed by oxidation in supercritical conditions. PFAS in water is concentrated in a reverse osmosis step and salt from the resulting solution is removed in supercritical conditions prior to destruction of PFAS in supercritical conditions.

A device for recovering entrained organic particles from an aqueous solution is provided. The device comprises a tank configured to receive a mixed solution through an inlet, wherein the mixed solution comprises an aqueous solution and organic particles, a plurality of curved impellers configured to impel a torque on the mixed solution, wherein in response to receiving the torque the mixed solution moves in a rotational motion within the tank, a deflector wall coupled to the floor extending vertically from the floor and surrounding the plurality of curved impellers to form an inner well configured to direct a flow of the rotating mixed solution towards a top surface of the tank, and a skim launder coupled to a boundary wall of the tank and positioned at the top surface, wherein the skim launder is configured to recover organic particles from the tank as they separate from the aqueous solution.

To provide an inexpensive transfer system.SOLUTION: A transfer system 6 is provided in sand sedimentation 1 in which sand mixed in drainage settles and is accumulated on a bottom part 1a. The transfer system 6 includes: a tank 62 arranged upward from the bottom part 1a and stores liquid for sand collection; a first water supply pipe 63 extending from the tank 62 to the sand sedimentation 1; a discharge port 632 installed in the sand sedimentation 1; a container 71 that receives mixed liquid in which sand is mixed in drainage, into a space inside a container through an inflow port, and discharges from discharge port concentrated liquid in which density of sand with respect to drainage is high; and a storage tank 72 having the discharge port arranged inside the tank and storing the concentrated liquid obtained by the container 71. The discharge port 632 discharges the liquid for sand collection that has flowed through the first water supply pipe 63 and transfers a mixed object accumulated on the bottom part 1a. The container 71 sends liquid in the received mixed liquid, from a delivery port to the tank. An aperture area of the delivery port is equal to or greater than an aperture area of the discharge port.SELECTED DRAWING: Figure 2

The utility model discloses organic silicon resin separation equipment which comprises a device body, a separation barrel is arranged in the device body, a cover plate is arranged on the separation barrel, a heating plate is arranged in the separation barrel, a feeding port, a motor, an exhaust pipe and a connector are sequentially arranged above the cover plate, the lower portion of the motor is connected with a connecting rod, and the lower portion of the connecting rod is connected with an exhaust pipe. Stirring blades are installed on the connecting rod, a sealing pipe is arranged in the exhaust pipe in a sealed mode, one end of the sealing pipe is connected with an activated carbon adsorption tower, a discharging pipe is arranged on the activated carbon adsorption tower, a connecting pipe is installed in the connector, a three-way spray head is connected to the lower portion of the connecting pipe, a suction pump is connected to the upper portion of the connecting pipe, and one end of the suction pump is connected with a water tank. The separation barrel is connected with a discharging pipe and a residue discharging pipe, volatile low-molecular substances released by heating can be subjected to adsorption treatment, the concentration of the volatile low-molecular substances is reduced, the operation cost is low, implementation is easy, and harm of the volatile low-molecular substances to the human body is reduced.

The invention relates to the technical field of silt cleaning and discharging, in particular to an automatic and quantitative desilting cleaning and discharging system. The system comprises a plurality of tandem type desilting basins, and acceleration pumps are arranged in the connecting sections of every two adjacent desilting basins; an acceleration pump can actively provide rotation acceleration power for water flow, the centrifugal force effect is strengthened, and meanwhile secondary flow is used for promoting sediment to be gathered to the bottom of a sand basin and then sediment in a sand storage bin; and finally, discharging of sediment in the sand storage bin is achieved through cooperative control of a control circuit and two ball valves which are arranged at the upper end and the lower end of the sand storage bin and opened in a staggered mode, the sediment settling and discharging process can be efficiently and automatically completed, and the device is suitable for numerous water flow environments and engineering scenes.

A system and method of isolating extracellular vesicles. The method includes loading one or more of blood or bone marrow into an input port of a concentration system and centrifuging one or more of the blood or bone marrow to separate one or more of red blood cells, platelet poor plasma, or platelet rich plasma / bone marrow concentrate fractions via a centrifuge device. The method further includes pumping one or more of bone marrow / platelet rich plasma fractions and platelet poor plasma fractions into a receptacle of the concentration system and adding a concentrated aqueous two-phase solution to one or more of the bone marrow concentrate / platelet rich plasma fractions and platelet poor plasma fractions. The method also includes drawing the concentrated aqueous two-phase solution and one or more of the bone marrow concentrate / platelet rich plasma fractions or platelet poor plasma fractions back into the centrifuge device to isolate one or more of extracellular vesicles and platelet rich plasma / bone marrow concentrate fractions.

The invention relates to the technical field of chemical engineering, and discloses an amide oil separation and ammonium sulfate crystallization integrated device. Comprising a neutralization reactor, a settling separation tank, a pre-crystallization solution tank, a DTB crystallizer, a centrifugal machine, a settling separator, a dryer, a mother liquor tank, a condensate water tank, an amide oil decanter, an ammoximation tert-butyl alcohol tower reboiler, a mother liquor heater set, a condenser, a vacuumizing condensing unit, a stirrer set and a reactor circulating pump. The invention further comprises a process for preparing the large-particle ammonium sulfate crystal from the saturated amide oil solution, rearrangement liquid from a lactam rearrangement system and gas ammonia are added into a neutralization reactor through an external circulation pipeline, and the large-particle ammonium sulfate crystal is prepared by fully utilizing heat in the gas ammonia dissolution and neutralization reaction and crystallization process. By combining the compound additive, the seed crystal and the continuous crystallization technology, the generation of large-particle ammonium sulfate crystals is promoted, meanwhile, the crystallization process is optimized, an efficient amide oil separation and continuous crystallization mode is realized, the energy consumption is saved, and the production efficiency is improved.

The invention discloses an integrated treatment process for heavy metal wastewater. The integrated treatment process comprises the following steps: step 1, pretreatment; 2, biological agent treatment; step 3, air flotation and magnetic separation; step 4, precipitation and separation; step 5, post-processing; step 6, magnetic medium separation and recovery; wherein in the second step, a biological agent adding unit and a hydrolysis reaction unit are included, the biological agent treatment unit comprises a stirrer, an agent adding ring and a guide cylinder, the stirrer comprises a stirring motor and a stirring impeller, the stirring impeller is connected with the stirring motor and inserted into the guide cylinder, and the agent adding ring is connected with the stirring impeller and synchronously rotates with the stirring impeller; the flow guide cylinder is provided with a turbulent flow ring, the turbulent flow ring comprises a ring body and cutting teeth, the ring body is installed in the flow guide cylinder, and the cutting teeth are arranged on the ring body. Compared with the prior art, the purposes of efficient treatment, stable water outlet, land occupation and cost saving and convenience in installation and extension are achieved.

The utility model discloses a rotary tangent water inlet device of a multi-layer rotational flow grit chamber, which comprises a stacked disc, a water distribution port component is spirally connected with the tangent angle of the stacked disc, the end part of the water distribution port component is connected with a water inlet component through a water segregator, the water inlet component comprises a water inlet, the vertical line direction of the water inlet is gradually reduced, and the vertical line direction of the water inlet is gradually reduced. The horizontal direction is gradually expanded, the gradually-shrinking angle is smaller than or equal to 15 degrees, the gradually-expanding angle is smaller than or equal to 10-20 degrees, and the gradually-shrinking angle is smaller than or equal to the gradually-expanding angle; the water flow enters the stacked disc from the outside of the stacked disc and rotates to enter the stacked disc through the tangent angle, so that the length of the water inlet device can be prolonged, the diverging ratio of the water inlet device and the inclination angle of the bottom edge of the lower portion of the water inlet device are adjusted, the flow speed changes stably, the turbulence degree is reduced, and the water flow is more stable when entering the stacked disc spiral flow cavity; the top elevation of the water inlet is higher than the upper edge of the top stacked disc by a certain height, and it is guaranteed that the water inlet liquid level elevation is higher than the water outlet liquid level elevation of the stacked disc, so that the device is driven by hydraulic power to operate.

The invention discloses a system and a method for extracting and filtering sweet-scented osmanthus liquid for sweet-scented osmanthus tea, and relates to the technical field of biological extraction. Comprising a stock solution tank, a filtering device and a storage tank which are sequentially communicated, and the filtering device is connected with an external nitrogen supply device and internally provided with a pre-separation unit, a microfiltration unit and an oil-water separation unit. In the pre-separation unit, a spiral feeding cavity is connected with a rotational flow cavity through a tangential channel, a screw rod and the rotational flow cavity form an annular rotational flow chamber, and an ultrasonic generator, a slag collecting chamber and a spiral slag discharging device are arranged; the microfiltration unit comprises a microfiltration cavity, and the stock solution in the rotational flow cavity is led to the bottom of the microfiltration cavity through a liquid distribution pipe and is filtered to a liquid collection chamber through a ceramic membrane pipe; a liquid inlet pipe of the oil-water separation unit is connected with a liquid collection chamber, and an upper component liquid outlet and a lower clear liquid outlet of an oil-water separation cavity are respectively connected with a storage tank to realize extraction and filtration of sweet-scented osmanthus component liquid. According to the invention, high-efficiency solid-liquid pre-separation, microfiltration and oil-water separation integrated purification of the sweet-scented osmanthus liquid and sesame oil recovery can be realized under nitrogen-sealed positive pressure conditions, membrane pollution is reduced, and aroma activity is maintained.

Methods and systems for separating material using a combination of a sieve bed and a gravity separator are included. Material is collected from the waste stream and passes through the screener. The collected larger material is then directed to a first gravity separator having a specific gravity. Plastic and residual metal are recovered.

The present invention is related to the field of tissue regeneration. It concerns more particularly new processes, tubes and devices for thrombin, platelet concentrate and wound healant preparations, alone or in combination with cell extracts, cell compositions and uses thereof.