Apparatus and method for removal of particles and VOC from an airstream, in which particles carried by the airstream are charged by a corona ionizer and then collected by an electrically enhanced filter downstream of the ionizer. A catalytic filter downstream of the electrically enhanced filter removes VOC as well as ozone generated by the ionizer.

Kinetically stable halogenated polysilanes include mixture of compounds having respectively at least four silicon atoms bound together, the substituents thereof comprising chlorine, and chlorine and hydrogen, and in the composition thereof, the atomic ratio of substituent to silicon is at least 1:1, wherein a) the kinetically stable halogenated polysilanes have a kinetically high stability in relation to oxidative splitting by chlorine, and the degree of conversion at temperatures of 120° C. within 10 hours with an excess of chlorine gas at 1013 hPa does not exceed 30 mol %, and b) the kinetically stable halogenated polysilanes have a percentage of branching points in the polysilane molecules of more than 8 mol %.

The present disclosure provides an apparatus for manufacturing a single crystal silicon ingot having a dual crucible for silicon melting which can be reused due to a dual crucible structure. The apparatus includes a dual crucible for silicon melting, into which raw silicon is charged, a crucible heater heating the dual crucible to melt the raw silicon into molten silicon, a crucible drive unit controlling rotation and elevation of the dual crucible, and a pull-up drive unit disposed above the dual crucible and pulling up a seed crystal dipped in the molten silicon to produce a silicon ingot. The dual crucible has a container shape open at an upper side thereof, and includes a graphite crucible having an inclined surface connecting an inner bottom and an inner wall, and a quartz crucible inserted into the graphite crucible and receiving the raw silicon charged into the dual crucible.

The present invention concerns a process for producing ammonia synthesis gas from the reforming of hydrocarbons with steam in a primary reformer (1) equipped with a plurality of externally heated catalytic tubes and then in a secondary reformer (2) together with an oxidant gas. In this process, the reaction of said hydrocarbons with said steam in said primary reformer (1) is performed at an operating pressure of at least 45 bar in the catalytic tubes and a flow of essentially pure oxygen or oxygen-enriched air is added to said secondary reformer as oxidant gas for substantially reforming together with said all the hydrocarbons content of said product gas exiting the primary reformer (1). In the case essentially pure oxygen is used as oxidant gas, a flow of nitrogen is added downstream the secondary reformer (2) to reach a N2/H2 molar ratio corresponding to or close to the stoichiometric ratio for ammonia synthesis. This process allows to obtain high synthesis gas production capacities and lower investment and energy costs.

System and method for sustainable economic development which includes hydrogen extracted from substances, for example, sea water, industrial waste water, agricultural waste water, sewage, and landfill waste water. The hydrogen extraction is accomplished by thermal dissociation, electrical dissociation, optical dissociation, and magnetic dissociation. The hydrogen extraction further includes operation in conjunction with energy addition from renewable resources, for example, solar, wind, moving water, geothermal, or biomass resources.

A method of preparing functionalized graphene, comprises treating graphene with an alkali metal in the presence of an electron transfer agent and coordinating solvent, and adding a functionalizing compound. The method further includes quenching unreacted alkali metal by addition of a protic medium, and isolating the functionalized graphene.

Providing a roaster that operates at temperatures in the range of 800° Celsius to 2000° Celsius with inert, optional oxidizing and reducing gases to treat graphite contaminated with radionuclides including tritium, carbon-14, and chlorine-36. The combination of temperatures and gases allow for the removal of most to substantially all the carbon-14 within the graphite while substantially limiting gasifying the bulk graphite.

Provided are a method for post-treatment of a carbonaceous material using dehydrocyclization, a carbonaceous material post-treated by the method, and a polymer composite material including the carbonaceous material. More particularly, provided are a method for post-treatment of a carbonaceous material using dehydrocyclization, including subjecting the carbonaceous material to dehydrocyclization at room temperature to heal structural defects in the carbonaceous material, while increasing the effective conjugated length of the carbonaceous material to improve the electrical conductivity thereof, as well as a carbonaceous material post-treated by the method and a polymer composite material including the carbonaceous material.

A semi-continuous process and system thereof, for the synthesis of a narrow particle size distribution Zeigler Natta procatalyst for use in the manufacture of polyolefins. The process comprises: (a) mixing a reaction mixture containing a titanium compound; (b) charging a first reactor with said reaction mixture; (c) removing excess reactants from said first reactor as a filtrate; (d) feeding said filtrate to at least one further reactor; and continuously removing excess reactants from said at least further reactor.

The present invention relates to a method of preparing a spherical mesoporous silica structure containing silver nanoparticles dispersed therein by adding a silver nitrate solution to an aqueous surfactant solution and performing a sol-gel process and to spherical mesoporous silica prepared thereby. The spherical mesoporous silica is cost-effective compared to a conventional method that uses silver nanoparticles as a raw material, because the silver nitrate solution that is inexpensive compared to silver nanoparticles is used. Also, the spherical mesoporous silica can be with high productivity in large amounts, and thus is easily commercialized. Moreover, because silver nanoparticles are incorporated into the pores of the mesoporous silica, the silver nanoparticles are used stably and do not change color and odor. In addition, the spherical mesoporous silica exhibits various additional effects, including far-infrared ray emission and deodorization, attributable to silica.

Provided is a method of producing a carbon catalyst having an improved activity. The method of producing carbon catalyst including a carbonization step of carbonizing raw materials containing an organic compound as a carbon source, a metal, and an electrically conductive carbon material to produce a carbonized material; a metal impregnation step of impregnating the carbonized material with a metal; and a heat treatment step of subjecting the carbonized material impregnated with the metal to a heat treatment.

Described is a process for preparing platinum-carbene complexes.

The present invention provides an alkali metal salt of fluorosulfonyl imide having favorable heat resistance and a reduced content of specific impurities and a water content, and provides a method for producing an alkali metal salt of fluorosulfonyl imide, which is capable of easily removing a solvent from a reaction solution. An alkali metal salt of fluorosulfonyl imide of the present invention is represented by the following general formula (I) and has a mass loss rate of 2% or less when the alkali metal salt of fluorosulfonyl imide is kept at 100° C. for 8 hours under an air current. A method for producing an alkali metal salt of fluorosulfonyl imide of the present invention comprises a step of concentrating a solution of the alkali metal salt of fluorosulfonyl imide by bubbling a gas into a reaction solution containing the alkali metal salt of fluorosulfonyl imide, and/or concentrating a solution of the alkali metal salt of fluorosulfonyl imide by thin layer distillation.

A portable, collapsible vending cart which can be used to vend disparate items in a variety of environments. The cart is adaptable to accommodate vendors of a wide variety of products, and provides an apparatus which is in compliance with most state regulations for vending carts. The cart is adapted to fit within the “security space” of a storefront, the space between a pull down security gate and the display window/entry point of the storefront. A locking mechanism extending from the vending cart is designed for secure locking engagement within the security space using infrastructure associated with the standard security gate.

An enclosure for enclosing a flat panel display for viewing that is substantially sealed and resistant to liquid ingress. The enclosure comprises a bezel, a substantially transparent front cover, and an enclosure housing. The bezel has a peripheral surface defining an enclosure area, an inner edge defining a display opening, and a rear surface. The substantially transparent front cover is operatively connected to the bezel and covers the display opening. The enclosure housing has a front opening and a flange disposed about and extending from the front opening. The bezel and the enclosure housing are joined together at a joining region that is substantially sealed and resistant to liquid ingress. The bezel, the front cover, and the enclosure housing define the enclosure, which is configured to receive a flat panel display therein.

A table top dishwasher comprises (a) a tub (10) for accommodating articles to be cleaned; (b) a water-tight hood (12) arranged over said tub (10), said hood comprising a fixed hood portion (14), an access opening (42), and a rotatable door (16) which is connected to the fixed hood portion so as to be rotatable between a raised opened position in which it exposes the access opening to provide access to the tub and a lowered closed position in which it closes the access opening and forms part of the water-tight hood; and (c) a gasket (44) which is attached to the fixed hood portion (14) or to the rotatable door (16) along an edge region of the access opening, wherein the fixed hood portion (14)or the rotatable door (16), respectively, comprises a plurality of mounting projections (46), and wherein the gasket comprises a plurality of apertures (54) in which the mounting projections are held by snap-fit connection.

An anesthesia workstation includes a sliding track system attached to the front of the anesthesia workstation for the mounting of one or more displays. The displays are horizontally slidable along the front of the anesthesia workstation along the sliding track. In addition, the sliding track system includes pivot points which enable outward pivoting of the displays up to 90 degrees. Sliding and pivoting of the displays is possible both independently and simultaneously. The sliding track system allows the anesthetist to slide and pivot the displays across the front of the workstation along the length of the track to the most preferable viewing position. Additional storage space is positioned within the anesthesia workstation behind the displays and becomes exposed and accessible when the displays are manipulated via the sliding track system.

A cabinet drawer includes a molded drawer floor having a central portion including at least one depression, each depression having a bottom wall and a sidewall having an inner surface and an outer surface. A flange extends outwardly from an upper edge of each depression. A plurality of webs extends outward from each depression outer surface for connection with a drawer slide system. A peripheral edge of the flange includes a plurality of deflectable tabs for coupling to a surrounding fence without the use of fasteners. The fence includes a skirt portion extending downward from the drawer floor flange to hide any drawer slide mechanism coupling the drawer floor to any underlying base.

A bottom mount refrigerator is provided with refrigerator components housed in a space adjacent the top of the fresh food compartment between a false ceiling and the top wall of the compartment. The top wall includes a stepped portion formed in the liner forming the compartment. The stepped portion is positioned near the top and front of the compartment, and it includes a section that is lower than the remainder of the top wall. The stepped portion includes a rear facing face in the interior of the compartment, and the false ceiling is positioned between the rear facing face and the back wall. The ceiling extends horizontal from the rear wall before angling upward to abut the face of the stepped portion. The false ceiling may also contain apertures to provide access to the components housed between the ceiling and the top wall.

A refrigerator is provided with rotatable shelves for easy food/item access and cleaning. In one embodiment a stationary or fixed shelf includes a rotatable disk mounted on a bearing retainer having bearings therein for manual, three hundred sixty degree (360°) rotation as desired. In another embodiment a quarter-round pivotable shelf is attached to a stanchion to enable the shelf to be manually pivoted ninety degrees (90°) for withdrawing and returning the shelf to the refrigerator food storage compartment as needed.

An appliance is provided having one or more racks or shelves, the position of which may be adjusted vertically. Multiple different positions along the vertical direction can be made available for selection by a user of the appliance. One or more mechanisms allow for the selective adjustment and securing of the vertical position at which a shelf may be located.

A telecommunication distribution box includes a housing and an electrical component mounted in the housing. A cover plate is movably connected to the housing and is movable between open and closed positions. A lip extends outwardly from the cover plate. The lip covers the electrical component when the cover plate is in the closed position to prevent accessing and removing the electrical component.

A collapsible closet assembly has a pair of generally vertical rigid walls, and a plurality of generally flexible panels extending between the pair of rigid walls. A plurality of supports pivotally connect between the pair of vertical rigid walls and attach to the plurality of generally flexible panels, for movement of the plurality of supports, the pair of vertical walls, and the plurality of generally flexible panels between a collapsed position for storage and an expanded position for operation.

Systems, methods and apparatus are provided through which in some implementations an expandable or adjustable snap-in cam or other friction device having a mechanically lockable drawer, shelf or divider in a cabinet, pantry, kitchen cupboard mount includes no screws or other permanent mounting.

A fastening device for releasably mounting a front cover on a drawer, in particular on a side wall of the drawer, includes a furniture fitting that is pre-assembled on the front cover; a catching mechanism associated with the drawer and including a movable catching element accommodating the furniture fitting when the furniture fitting is inserted; and a pulling mechanism pulling the furniture fitting towards the drawer under the effect of a spring. A positioning contour and a movable positioning member are provided to move the catching element, and the positioning member and the positioning contour at least temporarily rest against each other under the effect of a spring.

A screwless carrying frame for data access devices is fixed to a bottom board and includes a first frame body having an upper structure with an upper vertical plate and an upper transverse plate connected into a step shape. The upper vertical plate has elastic packing elements, and the upper transverse plate has elastic support elements. A second frame body is installed at the bottom board and connected to the first frame body and includes an upper structure with an upper riser plate and an upper horizontal plate connected into a step shape. An upper carrying space is formed between two upper structures of the first and second frame bodies for accommodating the data access device. The elastic packing element is elastically packed at a lateral side of the data access device and the elastic support element is elastically supported at a bottom side of the data access device.

A tablet storage device includes a frame having a plurality of slots, at least one of which is adapted to hold a tablet. A docking station can be disposed in at least one slot. In some cases the docking station is configured to align a tablet as the tablet is positioned in the slot such that a corresponding port in the tablet aligns with, and connects to, a connector. The frame also has a surface to attach the device to a vertical surface and can have a door that can be moved from an open to a closed position and adapted to retain at least one tablet held within at least one slot when the door is closed. A power supply system and/or a network connection system can be provided with the tablet storage device.

A release-preventing system for wall cupboards wherein a cupboard (40, 70, 105, 110, 150) is hooked to a support (47, 76, 97, 115, 155) fixed to the wall (48, 77, 98, 114, 154) by a hook (41, 73, 91, 125, 162) of a cupboard holding device (40, 90, 124, 163) characterized in that between the hook (41, 73, 91, 125, 162) and the support (47, 76, 97, 115, 155) there is a release preventing element (51, 79, 101, 121, 160, 167) that prevents unhooking of the cupboard.

A pull-out guide for drawers or the like, includes a body rail, a drawer rail, and an automatic retraction for retracting the drawer rail into its closed final position. The automatic retraction is fixed to the body rail or drawer rail and has a pivotable coupling element that is guided in a longitudinally displaceable manner and interacts with a catch which is provided on the respective other rail. The automatic retraction and the catch are arranged in a vertical intermediate space, which is formed between a horizontal web of the body rail and a horizontal web of the drawer rail. The automatic retraction housing abuts the horizontal web of that rail to which the automatic retraction is fixed, and the coupling element can be pivoted about a horizontal axis into a locked position.

A connecting apparatus for connecting two drawer wall parts which are intended to be arranged at a right angle includes at least one receiving part which has a receiving opening for receiving an end section of a first drawer wall part and has at least one insertion opening, a bracket which has at least two limbs which run substantially parallel, wherein the bracket can be pushed onto a web, which is arranged or formed on a second drawer wall part, in order to connect the first drawer wall part and the second drawer wall part, and wherein the at least two limbs of the bracket surround the web of the second drawer wall part, wherein a first limb of the bracket can be inserted into the insertion opening in the receiving part and connects the receiving part to the second drawer wall part in a positionally secure manner.

A fastening device for releasably mounting a front cover on a drawer, in particular on a side wall of the drawer, includes a furniture fitting preassembled on the front cover; a catching mechanism associated with the drawer and which automatically retains the furniture fitting when the furniture fitting is inserted. The fastening device also includes a movable catching element having a positioning contour; and a locking mechanism for the catching mechanism. The locking mechanism prevents the furniture fitting from being accidentally released from the catching mechanism, and is equipped with a positioning member which can move within a guide track and rests against the positioning contour of the catching element.

A shelf assembly is provided for a refrigerator with a food compartment that includes a rear wall and a pair of opposed side walls. The shelf assembly includes a first and second shelf portion with first and second support surfaces. The second shelf portion is slidably moveable relative to the first shelf portion between an extended position and a retracted position. In the extended position, the second shelf portion is arranged such that the second support surface is substantially coplanar with the first support surface and the second support surface is located generally between a first support surface and a side wall of the food compartment. In the retracted position, the second planar support surface is arranged subjacent to the first planar support surface.

In one example, a modified electrical device includes a body and at least one connector on the body to make power and control connections with an active cover plate. A system includes an active cover plate comprising low voltage circuitry and a first interface and a modified electrical device. The modified electrical device includes high voltage circuitry and a second interface to connect to the first interface to supply low voltage to the active cover plate. A method for controlling a flow of power through a modified electrical device is also provided.

Storage apparatus configured to provide an external apparatus with logical storage area as data storage area, the storage apparatus having a physical storage medium configured to generate the logical storage area, and storage controller communicatively coupled to physical storage medium to control data input/output processing between the external apparatus and the logical storage area, wherein the storage controller includes circuit package including circuit board which implements predetermined function of storage controller and a circuit board case to accommodate the circuit board, plurality of cooling fan units that generate cooling air for cooling circuit component mounted on the circuit board of the circuit package, and a chassis having a structure for accommodating the circuit package and the cooling fan units, some of circuit packages are inserted to be accommodated in chassis from opening thereof and are arranged side by side across width direction of chassis.

A locking mechanism, adapted for connecting a first member to a second member, is provided. The locking mechanism includes a wedging unit, a locking unit and a pushing element. The wedging unit is disposed on the first member, and includes a hook movable between a wedging position and a separation position. The locking unit is disposed on the second member, and includes a locking element disposed in the second member, wherein the locking element is movable between a locking position and a releasing position. When the pushing element is moved toward a first direction, the pushing element pushes the locking element from the locking position to the releasing position to release the hook, and when the pushing element is moved toward a second direction, the pushing element pushes the hook from the wedging position to the separation position to release the hook.

A video display or screen cover which is preferably of a scale for covering large video walls (combinations of multiple video screens, such as in a matrix). The video display cover is for large screens and as such includes a series of coils and cords to fasten a transparent cover over a large expanse with sufficient surface tension to withstand contacts and blows from people and objects. The transparent cover is attached to a frame and the tension of the coils and cords applies surface tension to the surface of the transparent cover. The frame is preferably metal and sturdy and further has brackets to mount it to a wall.

The present invention pertains to a modular furniture system in which a flat-foldable or easily assembled and disassembled rigid base structure composed of rectangular-cross-sectioned pieces each with specific dimensions serves variously, once assembled, as the supporting framework for a flat-foldable chair seat-and-backrest module, which configured together with the base structure serves as either an upright dining chair with armrests or as a lower and more reclined lounge chair with armrests, or alternatively as configured for supporting the connectable or foldable components of a flat planar surface module to be used for dining or to serve as a desktop, or alternatively as configured for supporting a storage cabinet module with drawers or doors.

A pull-out guide assembly for a drawer, comprising a first guide part (2) and at least a second guide part (3) relatively and reversibly slidable in the pull-out direction of the drawer, at least one carriage (4) interposed between the first and second guide part (2, 3) and reversibly slidable in the pull-out direction of the drawer, the carriage (4) having a plurality of housing seats (8) for load-transmitting rolling elements (9) and at its ends elastically yielding stops (23, 23') suitable for interacting with arrest elements (30, 31) provided on the first and second guide parts (2, 3) in order to the limit the relative sliding thereof, characterized in that each of said stops (23, 23') is a component separate from the carriage (4) and has means of anchorage to the carriage (4), each stop (23, 23') being a component separate from the carriage (4) and having means of anchorage to the carriage (4) comprising an anchorage element (28, 28') insertable by means of mating shapes or by force or snap fitting into at least one of the housing seats (8) already present on said carriage (4) for the rolling elements (9).

A refrigerator is provided that includes a crisper system having one or more moveable and removable drawers. The drawers include rollers extending downwardly and outwardly from the drawers to provide maximum storage volume. The rollers are configured to work with channels formed in a support system, which may be integrally formed with a bottom floor of a compartment of the refrigerator. Therefore, the rollers and channels of the support system provide easy access and removability of the drawers of the crisper system.

A solar power inverter having a sealing means includes: a main case having an opening on a front surface thereof, the opening open and closed by a main cover; an auxiliary case coupled to one side surface of the main case, and having a second opening on a front surface thereof, the second opening open and closed by an auxiliary cover; and a gasket interposed between the main case and the auxiliary case, wherein the main case and the auxiliary case are coupled to each other by coupling bolts which pass through the main case, the gasket and the auxiliary case.

According to one embodiment, a battery-mounting structure includes a first housing, a second housing including a display device including a display screen, a hinge configured to attach the second housing to the first housing rotatably between a first position in which the display screen is covered with the first housing and a second position in which the display screen is exposed, and a battery configured to be attached to the first housing and including a recess configured to accommodate a part of the second housing in the second position.

portable electronic device includes a host module, a display module and a hinge structure. The hinge structure is pivotally connected to the host module and the display module. The hinge structure includes a support frame, a rotating component and two pivotal components. An end of the rotating component is installed inside the support frame and another end of the rotating component is installed inside the display module, so that the display module is capable of rotating in a first rotating direction relative to the support frame. The two pivotal components are disposed at opposite sides of the support frame and separated from the rotating component. An end of each pivotal component is installed inside the support frame and another end of each pivotal component is installed inside the host module, so that the display module is capable of rotating in a second rotating direction relative to the host module.

A cabinet drawer includes a molded drawer floor having a central portion including at least one depression, each depression having a bottom wall and a sidewall having an inner surface and an outer surface. A flange extends outwardly from an upper edge of each depression. A plurality of webs extends outward from each depression outer surface for connection with a drawer slide system. A peripheral edge of the flange includes a plurality of deflectable tabs for coupling to a surrounding fence without the use of fasteners. The fence includes a skirt portion extending downward from the drawer floor flange to hide any drawer slide mechanism coupling the drawer floor to any underlying base.

A highly reliable vacuum heat insulating material having excellent processability, usability and heat insulating performance and a heat insulating box using the vacuum heat insulating material are provided. A vacuum heat insulating material related to the present invention includes: a core material structured by a laminated structure of an organic fiber assembly formed by forming an organic fiber into a sheet shape and cutting an end face with a predetermined length, and having a core material opening portion formed by a through hole or a notch with cutting; a gas-barrier outer cover material containing the core material inside, having a sealing portion for sealing surrounding of the sheet-shaped organic fiber assembly and surrounding of the core material opening portion, and hermetically sealing an inside with almost vacuum status by sealing the sealing portion; and an outer cover material opening portion provided at the outer cover material under a status in which the sealing portion provided at the surrounding of the sheet-shaped organic fiber assembly and the surrounding of the core material opening portion is sealed, being a through hole or a notch which is smaller than the core material opening portion with a sealed amount, and a long fiber being equal to or longer than a length of the sheet is used for the organic fiber.

A profiled element for damping sound vibrations on rail lines including a first main surface, which is designed and dimensioned such that it can be attached as a support surface to sections of the rail web without having to provide an adhesive layer, wherein the profiled element further has at least one recess on a front surface located opposite of the support surface, wherein the at least one recess in the front surface is designed for the positive engagement of an elastic fixing element for fixing the profiled element against the rail web, and at least one widened region of the profiled element in the region of the front surface, said widened region present in the lower region of the front surface in an installed position.

A rail joint bar for use in an insulated lap joint assembly includes a longitudinal extending body defining a plurality of holes therein for receiving fasteners. The body has a first end and a second end positioned at opposite ends of the body relative to a longitudinal direction of the body. The body is bent forming a first portion adjacent to the first end, a second portion adjacent to the second end and spaced from the first portion in the longitudinal direction, and an intermediate portion defined therebetween and positioned between the first and second ends. The first portion and the second portion are substantially parallel to each other and, and the intermediate portion of the body is configured to accommodate an increase in thickness of a web section at a point where two railroad rails are joined.

A system for fixing a rail onto a foundation and a support plate intended for such a system. The system comprises a guide plate, a spring element which can be clamped against the foundation by means of a clamping element, sits on the guide plate and in the final mounted system with its free spring arm exerts a retaining force on a rail foot of the rail, and a support plate which is arranged to compensate for height differences between the guide plate and the foundation concerned. The system proposes dividing the support into two parts along a joint line which runs, starting from the one long side of the support plate aligned transverse to the rail to be fixed, at a distance from the one short side to the passage opening and from there intersecting the passage opening in the direction of the short side of the support plate.

A guiding mechanism for an electric tool includes at least two guiding elements at least one of which has a first end portion having at least one protruding portion extending outwards therefrom and the other of which has a second end portion having at least one groove therein which may be engaged with the protruding portion. The groove has a cut-out and the protruding portion has an elastic clamping portion which may be engaged with the cut-out.

A rail seat includes a concrete rail tie; a pair of rail clip support shoulders cast in place in said rail tie each said shoulder having a rail face between its external sides; a pair of shoulder insulators each shaped to lie against the rail face of the rail shoulder; a pair of rail clips each having a base section adapted to seat within the rail clip support shoulder and a toe section adapted to seat on the rail base. The clip and toe insulator assembly is loaded on the shoulder in a vertical direction so that parts of the toe insulator seat within pockets in the shoulder that enable the clip and insulator assembly to move laterally towards the rail but not away from it and the clip base is aligned with the shoulder slot ready to enter it when the clip is moved laterally to the parked position which applies a small downward force to the clip toes and at this stage lie outside the limits of the rail base and finally the clip can be moved laterally into the installed position where the toe insulators sit on top of the rail base and securely hold it down.

It is an object of the present invention to provide a light-emitting element with high light emission efficiency and with a long lifetime. A light-emitting device comprises a first electrode, a second electrode, a light-emitting layer, a first layer, and a second layer, wherein the first layer is provided between the light-emitting layer and the first electrode, the second layer is provided between the light-emitting layer and the second electrode, the first layer is a layer for controlling the hole transport, the second layer is a layer for controlling the electron transport, and light emission from the light-emitting layer is obtained when voltage is applied to the first electrode and the second electrode so that potential of the first electrode is higher than potential of the second electrode.