Abstract: A liquid ejection apparatus ejecting an aqueous ink and an aqueous reaction liquid containing a reactant that reacts with the aqueous ink to record an image on a record medium, wherein the liquid ejection apparatus includes an element substrate including: a plurality of individual channels having an ejection port configured to eject the liquid, a pressure chamber configured to supply the liquid to the ejection port, and an energy-generating element configured to generate energy to eject the liquid; an upstream channel configured to supply the liquid to the plurality of individual channels; and a downstream channel for outflow of the liquid from the plurality of individual channels, the ejection port has a protrusion protruding toward a center of the ejection port.

Abstract: An ink jet recording method including ejecting an aqueous ink from a first ejection port, and ejecting, from a second ejection port, an aqueous reaction liquid containing a reactant that reacts with the aqueous ink. The liquid ejection apparatus includes an element substrate having the second ejection port configured to eject the aqueous reaction liquid, a pressure chamber, and an energy-generating element, an upstream channel r, and a downstream channe, and the element substrate has a face configured to face the record medium in an ejection direction of the aqueous reaction liquid, wherein the method further including ejecting the aqueous reaction liquid from the second ejection port which is located closer to the pressure chamber than the face, and flowing the aqueous reaction liquid from the upstream channel to the downstream channel through the pressure chamber.

Abstract: The present invention provides a novel hydrolase that can industrially produce optically highly pure (1S,2S)-1-alkoxycarbonyl-2-vinylcyclopropane carboxylic acid with high efficiency at low costs, and a production method using the hydrolase.

Abstract: A liquid ejection head includes an element substrate, an electric wiring board, and a sealant. The element substrate includes a substrate having a first face, and an element, a channel forming member, and a pad array that are disposed at the first face of the substrate. The element is configured to eject a liquid. The channel forming member includes a pressure chamber, and an ejection port communicating with the pressure chamber and through which the liquid is ejected. The pad array includes multiple pads electrically connected to the element and arranged along one side of the substrate. The electric wiring board is connected to each pad via an electric connection part. The sealant is disposed on the first face of the substrate, and surrounds the electric connection part. In the element substrate, the channel forming member has an opening, and the pad array is located within the opening.

Abstract: A liquid ejection head includes a liquid chamber having an element that generates thermal energy, a discharge port for liquid, a nozzle that communicates between the discharge port and the liquid chamber, and a liquid supply path and a liquid collection path in communication with the liquid chamber on opposite sides. The thermal energy forms a bubble in the liquid chamber, and the formed bubble enters the nozzle to eject liquid under pressure of the bubble. In a state where at least a portion of the bubble in the nozzle has a velocity component toward a surface of the liquid chamber that has the element and before liquid to be ejected comes in contact with the surface of the liquid chamber by being drawn into the liquid chamber by contraction of the bubble, the bubble communicates with an atmosphere and the liquid is ejected through the discharge port.

Abstract: A processor of a medical support device is configured to: acquire an intracorporeal image that is captured by an intracorporeal camera that images an inside of a body of a subject, the intracorporeal image including, within an imaging range, an organ punctured by a puncture needle, an insertion part of a medical device inserted into the body, and a marker that is provided at the insertion part and is image-recognizable; derive position/posture information including at least one of a position or a posture of the insertion part based on the marker; and execute display control of displaying a puncture path of the puncture needle in a superimposed form at a position specified in the intracorporeal image based on the position/posture information.

Abstract: In an ink jet printing method for discharging ink from a liquid discharge head, the ink contains titanium oxide having a precipitation velocity of 1.0×10?11 m/s or more based on a Stokes equation in the ink, the liquid discharge head comprises a discharge port, a pressure chamber, an energy-generating element for discharging the ink, an upstream flow channel for supplying a liquid to the pressure chamber, a downstream flow channel communicating with the pressure chamber, and a pump communicating with the upstream and downstream flow channels and forming a circulation path in which the ink circulates in an order of the upstream flow channel, pressure chamber, downstream flow channel, and upstream flow channel, and a ratio of the flow rate Q of the ink in the circulation path to the maximum cross-sectional area S of the circulation path, Q/S [m/s], is higher than the precipitation velocity.

Abstract: In an ink jet printing method for printing an image on a print medium by discharging an aqueous ink and an aqueous reaction liquid containing a reactant that reacts with the aqueous ink from a liquid discharge head, the liquid discharge head includes an element substrate, upstream and downstream flow channels, a pump, and a temperature control unit. The element substrate includes a discharge port discharging the aqueous reaction liquid, a pressure chamber supplying a liquid to the discharge port, and a discharge element generating energy for discharging the liquid. The upstream flow channel supplies a liquid to the pressure chamber. The downstream flow channel communicates with the pressure chamber. The pump communicates with the upstream and downstream flow channels and allows a liquid in the downstream flow channel to flow in the upstream flow channel. The temperature control unit heats the aqueous ink or the aqueous reaction liquid.

Abstract: An ink-jet recording apparatus includes an ink-jet recording head including an ejection port for ejecting the ink, a pressure chamber communicating with the ejection port and including therein a recording element substrate configured to generate energy for ejecting the ink, a supply channel communicating with the pressure chamber and configured to supply the ink to the pressure chamber, and a temperature adjusting unit configured to heat the ink. The ink contains titanium oxide and has a viscosity of 8 mPa·s or more at 25° C.

Abstract: Provided is an ink jet recording method by a so-called multi-pass method. The recording head includes a plurality of ejection orifices for ejecting the aqueous ink, a pressure chamber that communicates with the ejection orifices, an ejection unit that includes an ejection element disposed in the pressure chamber and generating energy for ejecting the aqueous ink from the plurality of ejection orifices, and a circulation unit that includes a supply channel for supplying the aqueous ink to the pressure chamber of the ejection unit and a collecting channel for collecting the aqueous ink from the pressure chamber of the ejection unit. The aqueous ink contains a coloring material having a volume-based cumulative 50% particle diameter D50 (nm) of 160 nm or more.

Abstract: In an ink jet printing method for discharging ink from a liquid discharge head, the ink contains titanium oxide having a precipitation velocity of 1.0×10?11 m/s or more based on a Stokes equation in the ink, the liquid discharge head comprises a discharge port, a pressure chamber, an energy-generating element, an upstream flow channel for supplying a liquid to the pressure chamber, a downstream flow channel communicating with the pressure chamber, and a pump communicating with the upstream flow channel and the downstream flow channel and forming a circulation path in which the ink circulates in an order of the upstream flow channel, pressure chamber, downstream flow channel, and upstream flow channel, the liquid discharge head is configured so as to perform reciprocal scan, and a scanning velocity in a region where the liquid discharge head scans at a constant velocity is higher than the precipitation velocity.

Abstract: Provided is an ink jet recording method of ejecting an aqueous ink from ejection orifices to record an image on a unit area of a recording medium. Reciprocal scanning of a recording head is performed plural times on the unit area while performing reciprocal scanning in a direction intersecting a conveyance direction of the recording medium. The recording head includes the ejection orifices, a pressure chamber that communicates with the ejection orifices, and an ejection unit that includes an ejection element disposed in the pressure chamber to eject the aqueous ink. The recording head also includes a circulation unit having a supply channel for supplying the aqueous ink to the pressure chamber of the ejection unit, and a collecting channel for collecting the aqueous ink from the pressure chamber. The aqueous ink contains a particle having a specific gravity of 3.8 gram per cubic centimeter (g/cm3) or more.

Abstract: An ink-jet recording method includes ejecting an ink from an ink-jet recording head. The ink contains titanium oxide and a wax particle. The ink-jet recording head includes an ejection port through which the ink is ejected, a pressure chamber having therein an energy-generating element that generates energy for ejecting the ink, an ejection port portion configured to communicate between the ejection port and the pressure chamber, an individual supply channel communicating with the pressure chamber and configured to supply the ink to the pressure chamber, and an individual collecting channel communicating with the pressure chamber and configured to collect the ink from the pressure chamber.

Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.

Abstract: A liquid ejection head includes a print element substrate having an ejection port forming member including an ejection surface on which a plurality of ejection port arrays for ejecting liquid are formed and a protection member having an opening corresponding to one of the ejection port arrays, the protection member is provided with at least one recessed portion at an end parallel to a direction of the plurality of ejection port arrays in a direction orthogonal to the plurality of ejection port arrays and a projection portion projecting in the direction orthogonal to the plurality of ejection port arrays, the projection portion is provided inside the at least one recessed portion, and the ejection port forming member has a corresponding recessed portion corresponding to the projection portion in the direction orthogonal to the plurality of ejection port arrays.

Abstract: A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.

Abstract: A liquid ejection head includes an element substrate provided with an ejection port row in which ejection ports are arrayed. The port includes a protruding portion protruding toward a center of the ejection port, an energy generation element configured to generate energy to eject liquid, and a pressure chamber including the energy generation element thereinside. The head has a liquid supply path for supplying liquid to the pressure chamber, and a liquid collecting path for collecting liquid from the pressure chamber. A direction in which the protruding portion protrudes is substantially parallel to a flow direction of liquid in the pressure chamber flowing from the liquid supply path to the liquid collecting path via the pressure chamber. The flow direction is same direction in the pressure chambers, and is same direction as a relative moving direction of a medium that receives liquid ejected from the liquid ejection head.

Abstract: A liquid ejection head according to the present disclosure includes: a printing element substrate including an ejection surface provided with a first ejection orifice array in which an ejection orifice configured to be capable of ejecting a liquid is arranged in plurality in an array direction and a second ejection orifice array arranged in a direction intersecting with the array direction and the first ejection orifice array; and a protective member provided with a first opening corresponding to the first ejection orifice array and a second opening corresponding to the second ejection orifice array, wherein the protective member is arranged adjacent to the ejection surface of the printing element substrate via an adhesive arranged between the first ejection orifice array and the second ejection orifice array.

Abstract: There is provided a liquid ejection head including: a printing element board having an ejection surface in which an ejection orifice array is formed to eject liquid; and a protective member having an opening corresponding to the ejection orifice array, wherein the shape of the opening is an elongate shape having a longitudinal direction and a lateral direction in the case of viewing from the ejection surface, the opening has a first side surface parallel to the longitudinal direction and a second side surface parallel to the transverse direction, and the protective member s fixed to the ejection surface such that the first side surface has a first inclination angle with the ejection surface.

Abstract: A liquid ejection device has an element substrate having an ejection port; and a voltage application unit applying a voltage to the element substrate, wherein the element substrate has a first layer having the ejection port and a first channel communicating with the ejection port and a second layer fixed to a back face of the first layer and having a second channel communicating with the first channel, a heat element for ejecting the liquid, a first electrode covering a surface of the heat element on a side of the first layer and exposed to the first channel, and a second electrode exposed to the first channel at a position different from the first electrode and not overlapping the heat element on a plan view, and the voltage application unit is configured to apply the voltage so that the first electrode is at a negative potential.