26results about How to "Fully adsorbed" patented technology

The application discloses a kind of waste tire geotechnical structure and its benzene permeation prevention processing method, processing method includes the following steps: waste mask disinfection treatment;ZnCl2 is dissolved in HCl, preprocessed activated carbon is added, after oscillation stirring, make ZnCl2 solution enter into activated carbon, dry to constant weight, with nitrogen at 850~900 ℃, activated carbon is activated, and ZnCl2 modified activated carbon is obtained;Multiple waste masks are tied together, and ZnCl2 modified activated carbon is wrapped between adjacent waste masks;Fixed on geogrid, the outer layer non-woven fabric of waste mask is towards waste tire, the inner layer non-woven fabric is towards geogrid, and ZnCl2 modified activated carbon is rolled on the tread pattern groove of waste tire;The bottom end of geogrid is fixed with lock catch.The application effectively solves the potential harm generated when waste tire is applied to geotechnical application, expands the application field of waste tire, and reduces the pollution generated when waste tire is used in soil.

This application relates to a bag-opening mechanism for a packaging machine, comprising a support frame. A first clamping and adsorption assembly and a second clamping and adsorption assembly are symmetrically arranged below the support frame. The first and second clamping and adsorption assemblies have identical structures, each including an adsorption assembly. Connecting arms are fixedly connected to both ends of the adsorption assembly. The ends of the connecting arms are connected to the support frame via adjustable length connecting rods. The connecting arm in the first clamping and adsorption assembly is connected to the support frame via a first rotating arm, with both ends of the first rotating arm rotatably connected to the connecting arm and the support frame. Similarly, the connecting arm in the second clamping and adsorption assembly is connected to the support frame via a second rotating arm, with both ends of the second rotating arm rotatably connected to the connecting arm and the support frame. A drive mechanism is provided on one side of the support frame to drive the first and second clamping and adsorption assemblies to move synchronously to achieve clamping and adsorption. This application improves the reliability and efficiency of the bag-opening mechanism and expands its applicability.

The utility model discloses a kind of dibenzyl ether oxidation preparation benzaldehyde tail gas adsorption devices, including adsorption tank, condensing box, receiver, condensing box is arranged at the side of adsorption tank, and is connected by connecting pipe, receiver is connected at the lower end of adsorption tank by receiver air outlet, the top of adsorption tank is provided with vapour inlet, the inside of adsorption tank is equipped with activated carbon adsorption module, and is provided with multiple groups, the collaborative work of the equipment such as condenser, activated carbon adsorption module, adsorption tank etc. by setting, can carry out efficient adsorption treatment to dibenzyl ether oxidation preparation benzaldehyde tail gas, make the organic gas in tail gas be fully adsorbed, to realize the standard discharge of tail gas, effectively reduce the pollution to environment.

The utility model discloses a glue tank adjusting mechanism of a primer machine. Two laterally rotating primer wheels are arranged on the inner side of a glue tank, and a first supporting assembly and a second supporting assembly are arranged on the lower side of the glue tank; in the first supporting assembly, two first supporting seats are fixed to the rack body, and first shaft rods are rotationally connected to the first supporting seats; the two adjusting wheels are connected with the first shaft rod and rotate along with the first shaft rod, and each adjusting wheel is provided with an eccentric arc-shaped groove; the two second supporting seats are fixed to the lower side of the glue groove, and the second shaft rod is connected to the second supporting seats and penetrates through the arc-shaped groove; in the second supporting assembly, a third supporting base is fixed to the rack body, a fourth supporting base is fixed to the lower side of the glue groove, and the third supporting base and the fourth supporting base are rotationally connected through a third shaft rod; according to the utility model, by adjusting the inclination of the glue groove, the book block is glued twice through the two bottom glue wheels, the thin glue is firstly glued to facilitate paper adsorption, and then the glue is glued to enable the lower glue to be more easily adsorbed on the back ridge of the book block, so that the paper is ensured to fully adsorb the glue, bubbles are avoided, the gluing is fuller, and the fitting quality of the book block and a book page is obviously improved.

The present application relates to a device and method for recycling wastewater and dye used for dyeing chemical fiber fabric, belonging to the field of sewage treatment technology. The device comprises a regulating and storing tank, a collecting box I, a resolving barrel, a collecting box II, a recovery tank I and a recovery tank II. The regulating and storing tank homogenously treats the dyeing wastewater through a stirring shaft, and sends the wastewater into the settling tank of the collecting box I through a water pump I. The dosing assemblies I and II add coagulant and coagulant aid to form floc to precipitate, and the supernatant enters the collecting tank. The two containing boxes in the resolving barrel are filled with activated carbon, and the supernatant is delivered through a water pump II to adsorb dye by the activated carbon. The saturated activated carbon is resolved by the resolving assembly, and the two containing boxes are alternately used by driving of a motor. The resolved dye liquid enters the recovery tank I through the collecting box II for recovery. The treated clean water is sent into the recovery tank II through a water pump IV for recycling. The present application realizes efficient recycling of dye and wastewater, improves the treatment continuity and resource utilization rate, and reduces the production cost and environmental pollution.

The utility model discloses a kind of plastic bottle embryo mould embryo process generation waste gas treatment devices, belong to waste gas treatment technical field;Including purification tank, the purification tank is provided with inlet pipe and outlet pipe, it further includes first activated carbon layer and second activated carbon layer, the first activated carbon layer and second activated carbon layer respectively include multiple activated carbon purification cylinder, the activated carbon purification cylinder is rotatably connected with purification tank, and the activated carbon purification cylinder of first activated carbon layer and second activated carbon layer is staggered arrangement;The utility model is set using cylindrical adsorption structure, and is set multiple, increase the contact area and path of waste gas and activated carbon, make adsorption more fully, effectively promote waste gas purification effect, motor drives activated carbon cylinder rotation, so that activated carbon all-round contact waste gas, fully exert adsorption capacity, avoid resource waste.

The utility model discloses a denitrification aluminum ash deironing system which comprises a first deironing mechanism, a size mixing and stirring tank and a second deironing mechanism, the first deironing mechanism comprises a first magnetic rod group and a second magnetic rod group which are arranged up and down, and the first magnetic rod group and the second magnetic rod group are sequentially contacted with aluminum ash powder passing through from top to bottom; the size mixing and stirring tank is used for receiving the aluminum ash powder output by the first discharging opening and mixing the aluminum ash powder into aluminum ash slurry; the second iron removal mechanism is used for receiving the aluminum mortar from the mortar mixing and stirring tank and adsorbing iron components in the aluminum mortar and comprises a first magnetic rod set and a second magnetic rod set which are rotationally arranged, and the first magnetic rod set and the second magnetic rod set are sequentially arranged in the conveying direction of the aluminum mortar. And the first magnetic rod group and the second magnetic rod group rotate and stir so as to contact and adsorb iron components in the aluminum mortar. The denitrification aluminum ash iron removal system disclosed by the utility model can improve the removal effect on weakly magnetic iron elements.

The utility model discloses a tea perfuming device for tea powder preparation, which comprises a base, the outer wall of the top of the base is fixedly connected with a driving seat, the inner wall of the driving seat is slidably connected with a stirring barrel, the tea perfuming device further comprises a spraying device, and the outer wall of the bottom of the spraying device is fixedly connected with the outer wall of the top of the driving seat; the utility model relates to the technical field of tea perfuming, according to the spraying device, through the cooperation of a spraying head and a spraying pipe, a water pump rapidly pumps perfume liquid in a spraying box, the perfume liquid is timely conveyed to the spraying head through a water outlet pipe and the spraying pipe and pushes a rotating paddle to rotate, and the rotating paddle drives the whole spraying head to slide and rotate along an annular groove through a rotating shaft; the atomized spice liquid is uniformly sprayed on the tea leaves through the atomizing nozzle, the stirring barrel can be heated through the heating plate arranged on the inner wall of the driving seat, and the tea leaves can better absorb the fragrance of the spice liquid by properly increasing the temperature.

The utility model discloses a screening separator with an automatic cleaning function, which relates to the technical field of waste metal barrel treatment and comprises a device shell, a tail gas treatment component is mounted at one end of the device shell, a positioning plate is arranged at an air inlet of the tail gas treatment component, a material receiving box is mounted at the bottom of the positioning plate, and a material receiving device is mounted at the bottom of the material receiving box. And a vibration assembly for shaking the metal fragments in the material receiving box is arranged at the bottom of the material receiving box and comprises a bottom plate, a spring and a connecting plate. Through the arrangement of the vibration assembly, multi-angle primary dust collection and heating are carried out on the two faces of metal fragments, then toxic gas adsorption is fully carried out on the metal fragments, the quality of the equipment is improved, the working efficiency is also improved, and the environment is effectively protected; and in the transportation process, the metal fragments are heated, toxic gas left on the surfaces of the metal fragments is adsorbed, the positions of the metal fragments are limited and controlled, and splashing of the metal fragments is reduced.

This invention relates to the field of exhaust gas treatment technology, specifically to a high-efficiency industrial exhaust gas treatment system and method. The system includes a cabinet with several air inlets at its bottom and several exhaust outlets on its side walls. Protective filters are fixedly connected to each of the air inlets and exhaust outlets. This invention utilizes an electrostatic adsorption roller to move up and down, effectively adsorbing dust particles inside the filter holes of the protective filter, maintaining the exhaust efficiency of the exhaust outlets after long-term operation of the exhaust gas treatment system. Simultaneously, the electrostatic adsorption roller can intermittently adsorb dust particles from the protective filter at the exhaust outlets, achieving automatic dust particle collection. Furthermore, a brush plate can be used to remove dust particles from the filter holes of the protective filter, maintaining the air intake efficiency of the air inlets, ensuring airflow rate and ventilation performance, and guaranteeing the stable and efficient operation of the industrial exhaust gas treatment system.

The utility model discloses a deep adsorption treatment device for chemical wastewater, which relates to the technical field of chemical wastewater treatment and comprises a treatment pond, a pretreatment unit and a deep adsorption unit. According to the chemical wastewater treatment device, the interior of the treatment tank is divided into three tank bodies by the separation frame, chemical wastewater to be treated flows downwards step by step along the step plates in the treatment tank, and the chemical wastewater can be subjected to multi-stage filtration by arranging different filtering boxes at the three tank bodies respectively, so that deep adsorption treatment on the wastewater is realized; therefore, various harmful impurities in the wastewater are effectively filtered out; a reliable pretreatment unit is also arranged, so that the flow rate of the wastewater can be reduced in advance, substances in the wastewater can be sufficiently adsorbed subsequently, and heat in the wastewater can be recycled; and a filter screen frame is arranged, so that large-particle impurities can be filtered and are prevented from entering a subsequent process to cause blockage, and the practicability of the device is effectively improved.

The invention discloses a waste gas treatment device for non-woven bag production, and particularly relates to the technical field of waste gas treatment.The waste gas treatment device comprises a conveying pipe, the conveying pipe is connected with a non-woven bag production device, the other side of the conveying pipe is fixedly connected with a first treatment mechanism, and the right side of the first treatment mechanism is fixedly connected with a dehumidification filtering mechanism; the middle of the right side of the dehumidification filtering mechanism is fixedly connected with a matching mechanism. According to the waste gas treatment device for non-woven fabric bag production, firstly, waste gas is subjected to acid-base neutralization to remove acidic harmful components, synchronous cooling treatment is conducted, the reaction time is prolonged, the basic purification effect is improved, then the waste gas makes uniform contact with an adsorption material through multi-path split-flow transmission, residual harmful gas is fully adsorbed, and the waste gas treatment effect is improved. Finally, fine particles are efficiently removed through a rotary capturing structure, attached particles are promoted to fall off and be recycled through the vibration effect, a single power source drives multiple structures to operate cooperatively, energy consumption is reduced, waste gas leakage is avoided through whole-process closed treatment, and it is ensured that exhausted gas meets the environmental protection standard.

The invention discloses a heat preservation rubber and plastic plate molding press and a thickness control pressing head thereof, and relates to the technical field of rubber and plastic plate production and processing, the heat preservation rubber and plastic plate molding press comprises a rack, and a heating assembly is fixedly installed at the center of the top of the rack. When the device is used, a fan is started, peculiar smell is sucked into a plurality of air suction hoods through air suction holes, then enters a square pipe through a fixed pipe and then enters a connecting pipe, sucked air is sprayed out downwards through an air outlet pipe, and sprayed air flow pushes arc-shaped blades to rotate; odor gas enters the annular adsorption bed along the arc shape of the arc-shaped blades, an adsorbent in the annular adsorption bed can adsorb the odor gas, the gas is driven to flow under the rotation of the arc-shaped blades, the odor gas can be fully adsorbed, the adsorption effect is improved, the treated air is discharged through the exhaust holes, and therefore the gas treatment effect is achieved. And the pollution to air and the influence on human health are reduced.

The embodiment of the invention relates to the technical field of pesticide preparation production, and provides a solution mixing device and process for production of a dispersible oil suspending agent, the solution mixing device comprises a main kettle body, a central driving shaft extends into a mixing main cavity, and a stirring paddle is arranged at the lower part of the main kettle body; the floating bearing assembly is arranged in the mixing main cavity and can synchronously move along with the lifting of the liquid level; the elastic impact breaking assemblies are distributed along the circumference of the floating bearing assembly, and each elastic impact breaking assembly comprises a fixed seat, an impact arm, an impact hammer and a force storage spring; the trigger transmission assembly is arranged between the center driving shaft and the elastic impact breaking assembly and used for converting the rotating motion of the center driving shaft into the periodic impact motion of the impact arm, and the impact hammer downwards impacts powder aggregates on the liquid level of the mixed liquid. By means of the technical scheme, the technical problem that in the prior art, the adaptability of the mixing strength and the adsorption effect of the auxiliaries is insufficient is solved.

This invention discloses a pulp molded product with high coffee grounds content, its preparation method, and its application. It contains pulp fibers and coffee grounds. The pulp fibers have a freeness of 25-45SR and a water retention value of 1.25-1.4. The coffee grounds constitute 30%-60% of the mass of the pulp molded product, and the particle size of the coffee grounds is 30-500 mesh. This pulp molded product can be prepared through fiber pulp, coffee grounds abrasive, mixing, and molding steps. The pulp molded product of this invention is particularly suitable for use as a coffee cup saucer.

The invention discloses an anti-interference electronic prepayment electric energy meter, and relates to the technical field of electric energy meters, the anti-interference electronic prepayment electric energy meter comprises a rear shell, the front end of the rear shell is buckled with a front shell, the interior of the rear shell is fixedly connected with a circuit board through bolts, and the front end of the circuit board is integrated with a display screen, a metering chip, a wireless communication module and an MCU controller; the air inlet and the air outlet which are obliquely formed are cooperatively matched with the cooling fan, an active convection channel is constructed, humid air is driven to actively and rapidly flow through the moisture absorption material in the dehumidification box, the contact area of the air and the moisture absorption material is increased, it is ensured that moisture is fully adsorbed, the humid state in equipment in a high-humidity area can be rapidly improved, and the service life of the equipment is prolonged. Meanwhile, the dehumidification box adopts a slot type drawing design, and is matched with a side door and a handle, so that moisture absorption materials can be conveniently observed, taken out or replaced without disassembling the equipment shell, the operation and maintenance difficulty and risk are reduced, and the maintenance efficiency is improved.

The application provides a production method of salt lake potassium chloride. The method comprises the following steps: adding fresh water into carnallite to perform decomposition, then filtering to obtain a solid-phase mixture; adding fresh water into the solid-phase mixture to perform dissolution to obtain a liquid-phase mixture; using a composite adsorption membrane to perform treatment on the liquid-phase mixture to obtain a filtrate; heating the filtrate to boiling, then cooling and crystallizing, and finally drying to obtain potassium chloride; the composite adsorption membrane comprises a first sodium ion adsorption membrane, a nano-alumina modified nanofiltration membrane and a second sodium ion adsorption membrane which are stacked in sequence. The nano-alumina modified nanofiltration membrane can effectively adsorb the residual divalent ions in the coexisting liquid, and the sodium ion adsorption membrane can fully adsorb sodium ions, so that the potassium ions and sodium ions and the divalent impurity ions can be separated. The method has the advantages of short process flow, simple operation, low production cost, high quality of the prepared potassium chloride product, good recovery rate and large particle size, and has a wide application prospect.

The utility model discloses energy-saving waste gas dust-removing environment-friendly equipment, and relates to the technical field of dust-removing environment-friendly equipment, the energy-saving waste gas dust-removing environment-friendly equipment comprises a dust-removing box body, the upper end of the dust-removing box body is provided with a dust-removing device, and one side of the dust-removing box body is connected with an adsorption device; the other side of the adsorption device is connected with the discharge device; according to the utility model, the activated carbon filter plates in the adsorption device are arranged in a rectangular array manner, so that the contact area and the contact time of waste gas and the activated carbon filter plates are increased, residual harmful gas and fine particles in the waste gas can be fully adsorbed, deep purification of the waste gas is realized, and the waste gas emission reaches a higher environmental protection standard; a plurality of top maintenance doors are arranged on the filter box, so that workers can conveniently check, replace and maintain the activated carbon filter plate, and the normal operation of the equipment is ensured.

The invention discloses a serum fibroblast activation protein detection kit based on latex microspheres, a detection method and application, and belongs to the technical field of biological reagents for diagnosis. The core breakthrough of the invention lies in that a dual-specificity system of latex microsphere specific adsorption and FAP targeted immunofluorescence coupling is constructed, and efficient and stable capture of the exosome is realized by virtue of the high specific surface area of the aldehyde group / sulfate latex microspheres and the specific interaction of the aldehyde group-amino group; and a high-affinity rabbit monoclonal anti-FAP antibody and a streptavidin-PE signal amplification system are matched, so that the detection problem of low-abundance FAP + Exo in an early tumor sample is successfully solved. Meanwhile, the integrity of the exosome structure and the FAP native conformation is guaranteed through the mild reaction conditions in the whole process, background interference is effectively deducted through a triple control system, and the accuracy and repeatability of the detection result are guaranteed.

The utility model relates to carbon dioxide capture technology field, specifically disclose a kind of carbon dioxide capture device, comprising: pretreatment mechanism, pretreatment mechanism includes flue gas exhaust pipe and is installed on the pretreatment component of flue gas exhaust pipe, pretreatment component includes temperature regulating equipment, desulfurization bin and dust bin, carbon capture mechanism, carbon capture mechanism includes the second transmission elbow pipe connected in the lower surface of dust bin, the second transmission elbow pipe is connected with absorption bin away from dust bin one end, absorption bin inside includes amine base compound solution;The device can realize the effect of absorbing carbon dioxide by cooperating with physics and chemistry by setting temperature regulating equipment, desulfurization bin and the pretreatment component of dust bin and absorption bin, finally carbon dioxide sensor detects that carbon dioxide content in flue gas is qualified only to automatically open electromagnetic valve and carry out smoke exhaust operation.

The utility model relates to the field of traditional Chinese medicine decoction piece processing, and discloses a dust removal device for traditional Chinese medicine decoction piece processing, which comprises a dust removal cabinet for processing traditional Chinese medicine decoction pieces, and a dust removal mechanism for traditional Chinese medicine decoction pieces is arranged on the dust removal cabinet; the traditional Chinese medicine decoction piece dust removal mechanism comprises a power motor, a net cylinder, a feeding hopper, a dust suction pipe, an arc-shaped dust suction cover, a connecting pipe, a round cover, cleaning bristles, a first drainage plate and a second drainage plate. The output end of the power motor is fixedly connected with the net barrel, the top end of the net barrel is fixedly connected with the feeding hopper, the dust suction pipe is fixedly connected with the arc-shaped dust suction cover and the connecting pipe, the round cover is fixedly connected with the connecting pipe, the cleaning bristles are fixedly installed on the inner wall of the net barrel, and the first drainage plate and the second drainage plate are fixedly installed on the inner wall of the net barrel. The traditional Chinese medicine decoction piece dedusting device has the following advantages and effects that the traditional Chinese medicine decoction pieces can be fully subjected to dedusting treatment, and the dedusting effect on the traditional Chinese medicine decoction pieces is guaranteed.

The utility model discloses a gravel waste dust-free smashing device which comprises a box body, a feeding port is formed in one side of the top of the box body, a smashing roller is installed on the inner wall of the box body, the gravel waste dust-free smashing device further comprises a screening device, and the screening device is installed between the box body and the smashing roller. The utility model relates to the technical field of sandstone waste dust-free crushing, and discloses a sandstone waste dust-free crushing device which is characterized in that small-particle materials are preliminarily screened through a material guide net, so that the materials are uniformly distributed, a crushing roller is matched with a material receiving disc and a screen to continuously crush the materials, and the material receiving disc slides along a vertical rod and extrudes an elastic piece in a mounting seat to perform vibration control through vibration; and meanwhile, the sealing performance is enhanced through the first soft sleeve on the surface of the mounting seat and the second soft sleeve at the bottom, so that the device can effectively improve the particle size distribution of materials and ensure the uniform particle size, is particularly suitable for crushing gravel waste, ensuring the uniform particle size and improving the recycling quality of the gravel waste, and has high practicability when being used for producing building materials. The stability of the product performance can be effectively improved.

The invention discloses a special garment processing solid waste environment-friendly treatment device and a treatment method thereof, and belongs to the technical field of solid waste treatment.The special garment processing solid waste environment-friendly treatment device comprises a shell, a feeding hopper is fixedly connected to the top of the shell, a discharging hopper is fixedly connected to the bottom of the shell, and supporting legs are fixedly connected to the bottom of the shell; a crushing assembly is arranged on the inner surface of the shell, a conveying assembly is arranged on the left side of the crushing assembly, an adsorption assembly is arranged at the top of the conveying assembly and comprises a rotating rod, and the rotating rod penetrates through the front face of the shell and is rotationally connected with the front face of the shell. The crushing assembly is arranged to shred solid waste in the special garment processing process, the crushing assembly can drive the conveying assembly to convey the waste to the crushing assembly in the operation process, at the moment, the waste conveyed on the conveying assembly can pass through the adsorption assembly, and therefore metal impurities in the waste are sucked out; and the effect of conveniently preventing metal impurities from damaging the crushing assembly is achieved.

The present application relates to the metallurgical technology field, especially relate to a kind of off-oven refining combined vacuum arc remelting preparation ultra-pure stainless steel method.The preparation method of the present application is by AOD station to transfer the crude molten steel obtained by EAF smelting to AOD refining furnace to blow oxygen refining, pre-reduction refining slag is CaO-CaF2-SiO2-MgO slag system;After pre-reduction treatment, reduction treatment is carried out, and the reduction refining slag is CaO-CaF2-SiO2-MgO slag system;The molten steel after reduction treatment is transferred to VD furnace for vacuum treatment, and the treated molten steel is transferred to ladle, then poured into mold, and ingot is obtained;After ingot is forged into electrode, ultra-pure stainless steel is prepared by VAR, with ultra-high cleanliness, coarse system inclusions is 0 level, fine system A+B+C+D inclusions≤0.5 level, effectively realize the accurate low control of aluminum content in steel, and simultaneously reduce the oxygen content and non-metallic inclusion content in steel, finally prepare high-quality ultra-pure stainless steel.

The utility model provides a kind of perfluorinated compound high-efficiency concentration device in water body, it is related to perfluorinated compound concentration technical field, including support base plate, the upside right end of support base plate is equipped with perfluorinated compound concentration subassembly, the perfluorinated compound concentration subassembly includes overflow jar installed in support base plate right side upper end, the downside of overflow jar is equipped with ultrasonic generator;The adsorption pipe that adsorbs perfluorinated compound is inserted into overflow jar, eluant reacts with perfluorinated compound on C18 film by osmotic action, combines it with eluant, forms soluble compound, when adsorption pipe is inserted into overflow jar, when being analyzed by eluant, ultrasonic controller controls ultrasonic generator to generate high frequency vibration, accelerates the reaction rate of eluant and perfluorinated compound, improves analysis efficiency, improves stripping effect simultaneously, after stripping end, adsorption pipe is extracted, to complete the analysis stripping process of perfluorinated compound.

The application discloses a static adsorption type plastic and metal solid waste grading separation device, and relates to the technical field of solid waste separation.The device comprises a grading box, a first fixed plate is fixedly connected to the bottom end of the grading box, a spring is fixedly connected to the bottom outer wall of the first fixed plate, a table plate is fixedly connected to the end of the spring away from the first fixed plate, a suction box and a support frame are fixedly connected to the bottom of the table plate; a grading screening assembly is arranged in the grading box; a dust collection assembly for adsorbing metal particles and a discharge assembly for releasing voltage are arranged in the suction box.In the application, the grading separation mode of "grading screening combined with large-particle-size air separation and small-and-medium-particle-size static adsorption" is adopted, so that efficient separation of solid wastes with different particle sizes and different materials is realized, and the structure linkage design of screening, air separation and static adsorption greatly improves the separation efficiency and purity, and meets the use requirement of people.